TW201337997A - Repeatable fuse for high current - Google Patents

Abstract

Provided is a repeatable fuse for high current, including a housing having an inner space; a first lead terminal disposed at a side surface of the housing; a second lead terminal disposed at the side surface of the housing to be spaced apart from the first lead terminal; a contact operation plate disposed in the housing to be electrically disconnected from the housing and to be electrically disconnected from or connected to either the first lead terminal or both the first lead terminal and the second lead terminal; a main spring and a bias spring which are disposed in the housing, and are elastic members configured to electrically connect or disconnect the contact operation plate to or from either the first lead terminal or both the first and second lead terminals; and a positive temperature coefficient thermistor inserted into the housing to be electrically connected to the first and second lead terminals. The positive temperature coefficient thermistor includes a positive temperature coefficient element, an electric resistance of which increases when a temperature of the positive temperature coefficient element is higher than a specific critical temperature. The contact operation plate is configured to operate according to tensile strengths of the main spring and the bias spring. The contact operation plate is configured to be moved in a direction in which the main spring and the bias spring are extended or compressed, to be electrically connected to or disconnected from either the first lead terminal or both the first and second lead terminals.

Description

Reproducible fuse for high current

The present invention relates to a reciprocal fuse for high current, comprising a positive temperature coefficient thermistor; and more particularly, the present invention relates to a reciprocable fuse for high current, wherein When the re-stable fuse is supplied with an overcurrent or is heated due to an external overheating, the resistance of one of the positive temperature coefficient thermistors is sharply increased to continuously prevent the current from flowing through the positive temperature coefficient thermistor Thereby, the power supply of the re-stable fuse is continuously cut off, and when the overcurrent disappears or the external overheating cause is removed, the PTC thermistor is cooled to allow the current to flow normally through the positive temperature Coefficient thermistor.

The present application claims priority to and the benefit of the Korean Patent Application No. 10-2011-0130731, filed on Dec.

In general, accidents are likely to occur in all different types of electrical/electronic products using electrical power, because they are attributable to one of the abnormal overcurrents or an external overheating occurring in one of the circuits. overheat. Conventionally, this problem is prevented by using a disposable fuse formed of a material that melts and cuts due to heat generated when an overcurrent flows through the disposable fuse. Although the disposable fuse is not expensive, the disposable fuse cannot be reused and should be replaced with a new fuse after use of the disposable fuse, thereby increasing the cost of replacement. To solve this problem, it has been manufactured by joining different types of metal plates having different coefficients of thermal expansion. A bimetal thermal switch replaces the disposable fuse. However, the bimetal thermal switch acts only as a contact point, has an operating rate that varies highly due to temperature, and requires an additional device (such as a limit switch).

On the other hand, when performing surface mounting on a printed circuit board (PCB), it is necessary to perform one of the surface mount fuses. However, surface mounting of a conventional disposable fuse cannot be performed because the conventional disposable fuse is melted at a temperature of about 270 ° C or higher during which welding is performed during a surface mount procedure. Although this problem can be avoided by using a bimetallic thermal switch, the bimetallic thermal switch has a large size and may deteriorate at a temperature of about 270 ° C or higher at which the soldering is performed. Therefore, surface mounting of the bimetal thermal switch cannot be performed.

In order to solve this problem, a re-stable fuse formed of an elastic member (for example, an elastic member formed of a shape memory alloy) which can be continuously used and which can be surface-mounted has been introduced. The re-stable fuse has high reliability because the power cut can be automatically performed and cancelled and the elastic member formed of a shape memory alloy has a low temperature deviation.

However, if the re-stable fuse repeatedly performs a process of performing power cut-off and canceling power cut in a state in which an electric circuit and the like are not sufficiently cooled under unstable current or voltage conditions, the fuse can be repeated. A fault that occurs or is contained in an electrical/electronic product can overheat. In this case, the electrical/electronic product may catch fire or fail.

[Previous Technical Document] [Patent Document]

Korean registered patent No. 10-1017995

Korean registered patent No. 10-0912215

Korean registered patent No. 10-0917996

The present invention is directed to a reflowable fuse for high current, wherein the positive temperature coefficient thermistor is heated when a positive temperature coefficient thermistor is supplied with an overcurrent or due to an external overheating cause One of the resistors is sharply increased to continuously prevent current from flowing through the positive temperature coefficient thermistor, thereby continuously cutting off the power supply of the re-stable fuse, and when the overcurrent disappears or the external overheating cause is removed The positive temperature coefficient thermistor is cooled to allow current to flow normally through the positive temperature coefficient thermistor.

According to an aspect of the present invention, a reflowable fuse for high current is provided, comprising: an outer casing having an inner space; a first lead terminal disposed at a side surface of the outer casing; a second lead terminal disposed at the side surface of the outer casing to be spaced apart from the first lead terminal; a contact operating plate disposed in the outer casing electrically disconnected from the outer casing and the first lead The terminal or the first lead terminal and the second lead terminal are electrically disconnected or connected; a main spring and a biasing spring are disposed in the outer casing and are configured to make the contact operation panel The first lead terminal or an elastic member electrically connected or disconnected from the first lead terminal and the second lead terminal; and a positive temperature coefficient thermistor inserted into the outer casing to be electrically connected to The first lead terminal and the second lead terminal. The positive temperature coefficient thermistor comprises a positive temperature coefficient component, and one of the positive temperature coefficient thermistors has a temperature higher than one of the positive temperature coefficient components Increase at a certain critical temperature. The contact panel is configured to operate in accordance with the tensile strength of the main spring and the biasing spring. The contact operating panel is configured to be moved in a tensile or compressive direction along one of the main spring and the biasing spring to electrically connect with the first lead terminal or the first lead terminal and the second lead terminal or Disconnected.

The resistance of the PTC thermistor can be increased to stretch the main spring when an overcurrent greater than a reference level is supplied or an internal temperature of the housing is attributed to an external environment above a certain critical temperature Therefore, the contact operation panel may be separated from the first lead terminal or the first lead terminal and the second lead terminal to be separated from the first lead terminal or the first lead terminal and the second lead terminal due to the tensile strength of the main spring. The terminals are electrically disconnected, thereby continuously preventing current flow between the first lead terminal and the second lead terminal. When the overcurrent disappears or the internal temperature of the outer casing is lower than the specific critical temperature, the positive temperature coefficient thermistor can be cooled to reduce the tensile strength of the main spring, and therefore, the contact operation plate can be attributed to the bias voltage Pressing the tensile strength of the spring toward the first lead terminal or both the first lead terminal and the second lead terminal to be electrically connected to the first lead terminal or both the first lead terminal and the second lead terminal, thereby Allows the repeatable fuse to return to a normal operating state.

The positive temperature coefficient thermistor may include: a first electrode electrically connected to the first lead terminal; a second electrode electrically connected to the second lead terminal; and a positive temperature coefficient element disposed thereon Between the first electrode and the second electrode, wherein one of the positive temperature coefficient thermistors increases in resistance when the temperature of the positive temperature coefficient element is above a certain critical temperature.

The positive temperature coefficient thermistor can have a plate shape. An insulator can It is disposed on one side surface of the positive temperature coefficient thermistor to prevent a short circuit from occurring between the first electrode and the second electrode.

The positive temperature coefficient element can be formed from a BaTiO ₃ based ceramic material.

The positive temperature coefficient element can be formed from a polymeric material in which the electrically conductive metal granules are distributed in the polymer matrix.

The re-stable fuse for high current may further comprise a support block that is inserted into the outer casing to securely contact the operating panel. The support block may be coupled to one end of the contact operation panel to support the contact operation panel, and may be formed of an insulator.

The main spring can be formed from a shape memory alloy. The biasing spring can include a conductive spring. The tensile strength of the primary spring may be greater than the tensile strength of the biasing spring when an overcurrent greater than a reference level is supplied or an internal temperature of the outer casing is attributed to an external environment above a particular critical temperature. When the overcurrent disappears or the internal temperature of the outer casing is lower than the specific critical temperature, the tensile strength of the main spring may be less than the tensile strength of the bias spring, and therefore, the contact operating plate may be attributable to the tensile spring bias The strength is applied toward the first lead terminal or both the first lead terminal and the second lead terminal.

A first opening may be formed in one of the first side surfaces of the outer casing. The first lead terminal and the second lead terminal may be inserted into the housing via the first opening. The contact operating panel can be configured to be electrically connected or disconnected from the first lead terminal and the second lead terminal. The first lead terminal and the second lead terminal may be electrically connected or disconnected from each other via a contact operation panel.

A plurality of contact units protruding upward may be respectively disposed on portions of the first lead terminal and the second lead terminal that are in contact with the contact operation panel. Contact the complex One of the contact unit of the contact unit of the plurality of contact units has a plate-like shape.

The contact operation panel may include: a connection unit electrically conductive and configured to contact the first lead terminal and the second lead terminal; a first connection unit connected to the connection unit; and a first board unit, It has a plate-like shape and is connected to the first connecting unit, and applies a force directly to the first plate unit according to the tensile strength of the main spring and the biasing spring. A force can be applied to the first plate unit according to the elastic movement of the main spring and the biasing spring. The connecting unit can be electrically connected or disconnected from the first lead terminal and the second lead terminal according to the force applied to the first board unit.

The main spring and the biasing spring may be disposed to be stretched or compressed in one direction parallel to the moving direction of the connecting unit. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed, a biasing spring may be disposed between the first plate unit and an inner wall of the outer casing.

The main spring and the biasing spring may be disposed to be stretched or compressed in one direction parallel to the moving direction of the connecting unit. The connecting unit may have a plate shape. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At one side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed, a biasing spring may be disposed between the connecting unit and an inner wall of the outer casing.

The contact operation panel may include: a connection unit having conductivity and contacting the first lead terminal and the second lead terminal; a first connection unit connected to the connection unit; and a first plate unit having a plate shape Shape and connection To the first connecting unit, and applying a force directly to the first plate unit according to the tensile strength of the main spring; a second connecting unit connected to the first plate unit; and a second plate unit, It has a plate-like shape and is connected to the second connecting unit, and applies a force directly to the second plate unit according to the tensile strength of the biasing spring. A force can be applied to the first plate unit according to one of the main springs being elastically moved. A force can be applied to the second panel unit in response to elastic movement of one of the biasing springs. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. A biasing spring may be disposed between the second plate unit and an inner wall of the outer casing at a side of the second connecting unit opposite to one side of the second connecting unit in which the main spring is disposed. The connecting unit can be electrically connected or disconnected from the first lead terminal and the second lead terminal according to the forces applied to the first board unit and the second board unit.

The re-stable fuse for high current may further include one of the trigger terminals inserted into the outer casing via one of the second openings formed in one of the second side surfaces of the outer casing. The trigger terminal can be electrically connected to the positive temperature coefficient thermistor.

A first opening may be formed in one of the first side surfaces of the outer casing. A second opening may be formed in the second side surface of one of the outer casings. The first lead terminal may be inserted into the housing via the first opening. The second lead terminal may be inserted into the housing via the second opening. The contact operating panel is disposed to be electrically connected to the second lead terminal and electrically connected or disconnected from the first lead terminal. The first lead terminal and the second lead terminal may be electrically connected or disconnected from each other via a contact operation panel.

One of the contact units protruding upward can be placed in contact with the contact panel One of the lead terminals is on the part. One of the contact units contacting the contact unit of the contact unit may have a plate shape.

A plurality of contact units protruding upward may be disposed on a portion of the first lead terminal that is in contact with the contact operation panel. One of the contact units contacting the plurality of contact units may have a plate-like shape.

One of the line contact units having one of the rod-like shapes protruding upward may be disposed on a portion of the first lead terminal that is in contact with the contact operation plate to increase a contact area between the first lead terminal and the contact operation plate. One of the contact units contacting the line contact unit may have a plate-like shape.

The contact operation panel may include: a connection unit having conductivity and contacting the first lead terminal; a first connection unit connected to the connection unit; and a first board unit having a plate shape and connected to The first connecting unit applies a force directly to the first plate unit according to the tensile strength of the main spring and the biasing spring. A force can be applied to the first plate unit according to the elastic movement of the main spring and the biasing spring. The connecting unit can be electrically connected or disconnected from the first lead terminal according to the force applied to the first board unit.

The main spring and the biasing spring may be disposed to be stretched or compressed in one direction parallel to the moving direction of the connecting unit. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed, a biasing spring may be disposed between the first plate unit and an inner wall of the outer casing.

The main spring and the biasing spring may be disposed to be stretched or compressed in the moving direction of the connecting unit. The connecting unit may have a plate shape. The main spring can be placed in Between the positive temperature coefficient thermistor and the first plate unit. At a side of the first connecting unit opposite to one side of the first connecting unit in which the main spring is disposed, a biasing spring may be disposed between the connecting unit and an inner wall of the outer casing.

The contact operation panel may include: a connection unit having conductivity and contacting the first lead terminal; a first connection unit connected to the connection unit; and a first board unit having a plate shape and connected to the a first connecting unit, and applying a force directly to the first plate unit according to a tensile strength of the main spring; a second connecting unit connected to the first plate unit; and a second plate unit having A plate-like shape is connected to the second connecting unit, and a force is directly applied to the second plate unit according to the tensile strength of the biasing spring. A force can be applied to the first plate unit according to one of the main springs being elastically moved. A force can be applied to the second panel unit in response to elastic movement of one of the biasing springs. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the second connecting unit opposite to one side of the second connecting unit in which the main spring is disposed, a biasing spring may be disposed between the second plate unit and an inner wall of the outer casing. The connecting unit can be electrically connected or disconnected from the first lead terminal according to the forces applied to the first board unit and the second board unit.

The re-stable fuse for high current may further include one of the trigger terminals inserted into the outer casing via one of the third openings formed in one of the third side surfaces of the outer casing. The trigger terminal can be electrically connected to the positive temperature coefficient thermistor.

The above and other objects, features and advantages of the present invention will become apparent from the <RTIgt;

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. While the invention has been shown and described with reference to the embodiments of the embodiments The same component symbols indicate the same elements in all figures.

A reversible fuse for high current according to an exemplary embodiment of the present invention includes: an outer casing having an inner space, a first lead terminal disposed at a side surface of the outer casing; a two lead terminal disposed at the side surface of the outer casing to be spaced apart from the first lead terminal; a contact operating plate disposed in the outer casing electrically disconnected from the outer casing and the first lead terminal Or the first lead terminal and the second lead terminal are electrically disconnected or connected; a main spring and a biasing spring are disposed in the outer casing and configured to contact the operating panel a first lead terminal or an elastic member electrically connected or disconnected from the first lead terminal and the second lead terminal; and a positive temperature coefficient thermistor inserted into the case to be electrically connected to the a first lead terminal and the second lead terminal. The positive temperature coefficient thermistor includes a positive temperature coefficient element, and the resistance of the positive temperature coefficient thermistor increases when a temperature of one of the positive temperature coefficient elements is higher than a certain critical temperature. The contact panel is configured to operate in accordance with the tensile strength of the main spring and the biasing spring. The contact operating panel is configured to be moved in a tensile or compressive direction along one of the main spring and the biasing spring to electrically connect with the first lead terminal or the first lead terminal and the second lead terminal or Disconnected.

When one current is greater than one reference level, the overcurrent is supplied or the internal temperature of one of the outer casings When the degree is higher than a specific critical temperature due to an external environment, the resistance of the positive temperature coefficient thermistor can be increased to stretch the main spring, and therefore, the contact operation panel can be attributed to the tensile strength of the main spring. Separating from the first lead terminal or the first lead terminal and the second lead terminal to be electrically disconnected from the first lead terminal or the first lead terminal and the second lead terminal, thereby continuously preventing current from flowing first Between the lead terminal and the second lead terminal. When the overcurrent disappears or the internal temperature of the outer casing is lower than the specific critical temperature, the positive temperature coefficient thermistor can be cooled to reduce the tensile strength of the main spring, and therefore, the contact operation plate can be attributed to the bias voltage Pressing the tensile strength of the spring toward the first lead terminal or both the first lead terminal and the second lead terminal to be electrically connected to the first lead terminal or both the first lead terminal and the second lead terminal, thereby Allows the repeatable fuse to return to a normal operating state.

The positive temperature coefficient thermistor may include: a first electrode electrically connected to the first lead terminal; a second electrode electrically connected to the second lead terminal; and a positive temperature coefficient element disposed thereon Between the first electrode and the second electrode, wherein one of the positive temperature coefficient thermistors increases in resistance when the temperature of the positive temperature coefficient element is above a certain critical temperature.

The positive temperature coefficient thermistor can have a plate shape. An insulator may be disposed on one side surface of the positive temperature coefficient thermistor to prevent a short circuit from occurring between the first electrode and the second electrode.

The positive temperature coefficient element can be formed from a BaTiO ₃ based ceramic material.

The positive temperature coefficient element can be formed from a polymeric material in which metal particles having electrical conductivity are distributed in the polymer matrix.

The re-stable fuse for high current may further comprise being inserted into the outer casing to One of the fixed contact panels supports the block. The support block may be coupled to one end of the contact operation panel to support the contact operation panel, and may be formed of an insulator.

The main spring can be formed from a shape memory alloy. The biasing spring can include a conductive spring. The tensile strength of the primary spring may be greater than the tensile strength of the biasing spring when an overcurrent greater than a reference level is supplied or an internal temperature of the outer casing is attributed to an external environment above a particular critical temperature. When the overcurrent disappears or the internal temperature of the outer casing is lower than the specific critical temperature, the tensile strength of the main spring may be less than the tensile strength of the bias spring, and therefore, the contact operating plate may be attributable to the tensile spring bias The strength is applied toward the first lead terminal or both the first lead terminal and the second lead terminal.

A first opening may be formed in one of the first side surfaces of the outer casing. The first lead terminal and the second lead terminal may be inserted into the housing via the first opening. The contact operating panel can be configured to be electrically connected or disconnected from the first lead terminal and the second lead terminal. The first lead terminal and the second lead terminal may be electrically connected or disconnected from each other via a contact operation panel.

A plurality of contact units protruding upward may be respectively disposed on portions of the first lead terminal and the second lead terminal that are in contact with the contact operation panel. One of the contact operating plates contacting the plurality of contact units has a plate-like shape.

The contact operation panel may include: a connection unit electrically conductive and configured to contact the first lead terminal and the second lead terminal; a first connection unit connected to the connection unit; and a first board unit, It has a plate shape and is connected to the first connecting unit, and according to the main spring and the biasing bullet The tensile strength of the spring is applied directly to the first plate unit. A force can be applied to the first plate unit according to the elastic movement of the main spring and the biasing spring. The connecting unit can be electrically connected or disconnected from the first lead terminal and the second lead terminal according to the force applied to the first board unit.

The main spring and the biasing spring may be disposed to be stretched or compressed in one direction parallel to the moving direction of the connecting unit. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed, a biasing spring may be disposed between the first plate unit and an inner wall of the outer casing.

The main spring and the biasing spring may be disposed to be stretched or compressed in one direction parallel to the moving direction of the connecting unit. The connecting unit may have a plate shape. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At one side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed, a biasing spring may be disposed between the connecting unit and an inner wall of the outer casing.

The contact operation panel may include: a connection unit having conductivity and contacting the first lead terminal and the second lead terminal; a first connection unit connected to the connection unit; and a first plate unit having a plate shape Forming and connecting to the first connecting unit, and applying a force directly to the first plate unit according to the tensile strength of the main spring; a second connecting unit connected to the first plate unit; and a second A plate unit having a plate-like shape and connected to the second connecting unit, and applying a force directly to the second plate unit according to the tensile strength of the biasing spring. A force can be applied to the first plate unit according to one of the main springs being elastically moved. Elastically movable according to one of the biasing springs A force is applied to the second panel unit. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. A biasing spring may be disposed between the second plate unit and an inner wall of the outer casing at a side of the second connecting unit opposite to one side of the second connecting unit in which the main spring is disposed. The connecting unit can be electrically connected or disconnected from the first lead terminal and the second lead terminal according to the forces applied to the first board unit and the second board unit.

The re-stable fuse for high current may further include one of the trigger terminals inserted into the outer casing via one of the second openings formed in one of the second side surfaces of the outer casing. The trigger terminal can be electrically connected to the positive temperature coefficient thermistor.

A first opening may be formed in one of the first side surfaces of the outer casing. A second opening may be formed in the second side surface of one of the outer casings. The first lead terminal may be inserted into the housing via the first opening. The second lead terminal may be inserted into the housing via the second opening. The contact operating panel is disposed to be electrically connected to the second lead terminal and electrically connected or disconnected from the first lead terminal. The first lead terminal and the second lead terminal may be electrically connected or disconnected from each other via a contact operation panel.

One of the contact units protruding upward may be disposed on a portion of the first lead terminal that is in contact with the contact operation panel. One of the contact units contacting the contact unit of the contact unit may have a plate shape.

A plurality of contact units protruding upward may be disposed on a portion of the first lead terminal that is in contact with the contact operation panel. One of the contact units contacting the plurality of contact units may have a plate-like shape.

One of the line contact units having a rod shape protruding upward can be placed in and Contacting a portion of the first lead terminal that the operation panel contacts to increase a contact area between the first lead terminal and the contact operation plate. One of the contact units contacting the line contact unit may have a plate-like shape.

The contact operation panel may include: a connection unit having conductivity and contacting the first lead terminal; a first connection unit connected to the connection unit; and a first board unit having a plate shape and connected to The first connecting unit applies a force directly to the first plate unit according to the tensile strength of the main spring and the biasing spring. A force can be applied to the first plate unit according to the elastic movement of the main spring and the biasing spring. The connecting unit can be electrically connected or disconnected from the first lead terminal according to the force applied to the first board unit.

The main spring and the biasing spring may be disposed to be stretched or compressed in one direction parallel to the moving direction of the connecting unit. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed, a biasing spring may be disposed between the first plate unit and an inner wall of the outer casing.

The main spring and the biasing spring are disposed to be stretched or compressed in the moving direction of the connecting unit. The connecting unit may have a plate shape. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the first connecting unit opposite to one side of the first connecting unit in which the main spring is disposed, a biasing spring may be disposed between the connecting unit and an inner wall of the outer casing.

The contact operation panel may include: a connection unit having conductivity and contacting the first lead terminal; a first connection unit connected to the connection unit; and a first board unit having a plate shape and connected to the First connection list And applying a force directly to the first plate unit according to the tensile strength of the main spring; a second connecting unit connected to the first plate unit; and a second plate unit having a plate shape The shape is connected to the second connecting unit, and a force is directly applied to the second plate unit according to the tensile strength of the biasing spring. A force can be applied to the first plate unit according to one of the main springs being elastically moved. A force can be applied to the second panel unit in response to elastic movement of one of the biasing springs. The main spring can be disposed between the positive temperature coefficient thermistor and the first plate unit. At a side of the second connecting unit opposite to one side of the second connecting unit in which the main spring is disposed, a biasing spring may be disposed between the second plate unit and an inner wall of the outer casing. The connecting unit can be electrically connected or disconnected from the first lead terminal according to the forces applied to the first board unit and the second board unit.

The re-stable fuse for high current may further include one of the trigger terminals inserted into the outer casing via one of the third openings formed in one of the third side surfaces of the outer casing. The trigger terminal can be electrically connected to the positive temperature coefficient thermistor.

<First Embodiment>

1 is a schematic diagram of one of reversible fuses for high current in accordance with a first exemplary embodiment of the present invention. 2 is a schematic cross-sectional view of one of the repeatable fuses for high currents depicted in FIG. FIG. 3 is a diagram showing one of the repeatable fuses for high current shown in FIG. 1 , wherein a first lead terminal 110 and a second lead terminal 120 are electrically disconnected from each other. FIG. 4 illustrates a positive temperature coefficient thermistor 160 in accordance with an exemplary embodiment of the present invention. FIG. 5 is a graph showing resistance characteristics of a positive temperature coefficient thermistor 160 in accordance with an exemplary embodiment of the present invention.

Referring to FIGS. 1 to 5, the re-stable fuse for high current according to the first embodiment includes a casing 100 (which includes an internal space), a first lead terminal 110, a second lead terminal 120, and a contact operation panel. 130, a main spring 140, a biasing spring 150 and a positive temperature coefficient thermistor 160. The first lead terminal 110 is disposed at one of the first side surfaces of the outer casing 100. The second lead terminal 120 is disposed at the first side surface of the outer casing 100 to be spaced apart from the first lead terminal 110. The contact operating panel 130 is disposed in the outer casing 100, electrically disconnected from the outer casing 100, and electrically disconnected or connected to the first lead terminal 110 and the second lead terminal 120. The main spring 140 and the biasing spring 150 are elastic members that are mounted in the outer casing 100 to electrically disconnect/connect the first lead terminal 110, the second lead terminal 120, and the contact operation plate 130 to each other. The positive temperature coefficient thermistor 160 is inserted into the outer casing 100 to be connected to the first lead terminal 110 and the second lead terminal 120. The re-stable fuse for high current may further include an insulating waterproof adhesive unit (not shown) that fixes the first lead terminal 110 and the second lead terminal 120 and seals the inside of the outer casing 100. The re-stable fuse for high current may further include a support block 170 that is inserted into the outer casing 100 to securely contact the operation panel 130.

The main spring 140 can be formed from a shape memory alloy. The biasing spring 150 can be formed by a conductive spring. The main spring 140 is when the re-stable fuse is supplied with an overcurrent greater than a reference level or is heated due to an external overheating and the internal temperature of one of the outer casings 100 is thus higher than a transition temperature of a shape memory alloy. One of the tensile strengths becomes greater than the tensile strength of the biasing spring 150. In this case, the contact operation panel 130 is disconnected from the first lead terminal 110 and the second lead terminal 120 and thus with the first lead terminal 110 and the second lead terminal 120 is electrically disconnected, thereby preventing current from flowing between the first lead terminal 110 and the second lead terminal 120. When one of the factors causing the overcurrent or the external overheating is removed and the internal temperature of the outer casing 100 is less than a certain critical temperature, the positive temperature coefficient thermistor 160 is cooled to reduce the tensile strength of the main spring 140. . Therefore, the tensile strength of the main spring 140 becomes smaller than the tensile strength of the biasing spring 150, and the contact operation plate 130 is pressed toward the first lead terminal 110 and the second due to the tensile strength of the biasing spring 150. The lead terminal 120 is thereby electrically connected to the first lead terminal 110 and the second lead terminal 120.

When an overcurrent is supplied to the re-stable fuse, the biasing spring 150 is heated to stretch (expand) the main spring 140, and the first lead terminal 110 and the second lead terminal 120 and the contact operation plate 130 are thus separated from each other Sexual disconnection. Next, an overcurrent flows to the positive temperature coefficient thermistor 160 and the positive temperature coefficient thermistor 160 self-heats to continuously maintain the main spring 140 at a high temperature (for example, 110 ° C or higher). Correspondingly, the first lead terminal 110 and the second lead terminal 120 and the contact operation panel 130 are electrically disconnected from each other.

However, if the factor causing the overcurrent is removed and the overcurrent is thus lost, the positive temperature coefficient thermistor 160 stops self-heating and is cooled, the tensile strength of the main spring 140 is reduced, and then, the contact operation panel 130 is returned. Due to the tensile strength of the biasing spring 150, the first lead terminal 110 and the second lead terminal 120 are pressed. Accordingly, the first lead terminal 110, the second lead terminal 120, and the contact operation panel 130 are returned to be electrically connected to each other.

The outer casing 100 can have any of various shapes (for example, a circular box shape, an elliptical box shape, and a polygonal box shape) because the outer casing 100 has an inner space. A cross section of the outer casing 100, which is perpendicular to its longitudinal direction, may have a circular, elliptical or polygonal shape. For example, the outer casing 100 may have a rectangular box shape including one inner space extending in the longitudinal direction and having a rectangular cross section perpendicular to the longitudinal direction.

The outer casing 100 houses and protects the contact operating plate 130, the main spring 140, and the biasing spring 150 therein.

A first opening 104 is formed in the first side surface of the outer casing 100, and the first lead terminal 110 and the second lead terminal 120 are inserted into the outer casing 100 via the first opening 104. According to an exemplary embodiment of the present invention, the outer casing 100 may be formed of an insulating material or a conductive material.

The first lead terminal 110 is, for example, an electrical connection unit that delivers current supplied from the second lead terminal 120 to an electric/electronic component (not shown), and the first lead terminal 110 is formed of a conductive material. The first lead terminal 110 is disposed at a first side surface of the outer casing 100. In the present embodiment, the first lead terminal 110 is disposed at one end of the outer casing 100 having a rectangular box shape. In this case, the first lead terminal 110 may be inserted into the outer casing 100 while passing through the first side surface of the outer casing 100, but the position of the first lead terminal 110 in the outer casing 100 is not limited as long as the first lead terminal 110 is It can be electrically connected or disconnected from the contact operation panel 130. The first lead terminal 110 is disposed to be insulated from the outer casing 100. To this end, the first side surface of the outer casing 100 in which the first lead terminal 110 is disposed may have an opening shape such that the outer casing 100 and the first lead terminal 110 may be spaced apart from each other, or the first lead terminal 110 may pass through the outer casing 100. One of the inner surfaces may be coated with an insulating material. The first lead terminal 110 is disposed to contact the positive temperature coefficient thermistor 160, and in particular, A lead terminal 110 is disposed to contact one of the first electrodes 162 of the positive temperature coefficient thermistor 160. The first lead terminal 110 may include one of the first contact units 112 protruding upward, which is in contact with one of the connection units 132 of the contact operation panel 130 on a portion of the first lead terminals 110.

The second lead terminal 120 is a unit on which power from the outside is supplied or connected to a power source, and the second lead terminal 120 is formed of a conductive material. The second lead terminal 120 is disposed at a predetermined distance from the first lead terminal 110. The second lead terminal 120 is inserted into the outer casing 100 via the first opening 104 in the first side surface of the outer casing 100 to be spaced apart from the first lead terminal 110. The second lead terminal 120 is disposed to be insulated from the outer casing 100. To this end, the first side surface of the outer casing 100 in which the second lead terminal 120 is disposed may have an opening shape such that the outer casing 100 and the second lead terminal 120 may be spaced apart from each other, or the second lead terminal 120 may pass through the outer casing 100. One of the inner surfaces may be coated with an insulating material. The second lead terminal 120 is disposed to contact a surface (second electrode 164) of one of the positive temperature coefficient thermistors 160 opposite to a surface of the positive temperature coefficient thermistor 160 that is in contact with the first lead terminal 110. The second lead terminal 120 may have a lower step portion 124 that is folded down to connect to one of the second electrodes 164 of the positive temperature coefficient thermistor 160. The second lead terminal 120 may include a second contact unit 122 that protrudes upward, which is in contact with the connection unit 132 of the contact operation panel 130 at a portion of the second lead terminal 120.

The first lead terminal 110 is electrically connected or disconnected from the second lead terminal 120 via the contact operation panel 130 . The contact operation panel 130 is such that the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other, and It is placed in the outer casing 100. The contact operating panel 130 is configured to operate in accordance with the tensile strength of the main spring 140 and the biasing spring 150 such that the contact operating plate 130 moves in a tensile or compressive direction along one of the main spring 140 and the biasing spring 150 for the first The lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected. The contact operation panel 130 may include: a connection unit 132 that contacts the first lead terminal 110 and the second lead terminal 120; a first connection unit 134 that is connected to the connection unit 132; and a first board unit 136 that is connected to The first connecting unit 132 applies a force directly to the first plate unit 136 according to the tensile strength of at least one elastic member selected between the main spring 140 and the biasing spring 150.

The connecting unit 132 can be electrically connected or disconnected from the first contact unit 112 of the first lead terminal 110, and can have a flat plate shape. In the embodiment in which the first lead terminal 110 and the second lead terminal 120 are inserted into the outer casing 100 via the first opening 104 formed in the first side surface of the outer casing 100, the connecting unit 132 is also The second contact unit 122 of the second lead terminal 120 is electrically connected or disconnected. The connecting unit 132 can include a conductive material.

The first connection unit 134 connected to the connection unit 132 may have a flat plate shape and may include a conductive material. The first connection unit 134 serves as a medium that connects the connection unit 132 with the first board unit 136 and may be disposed perpendicular to the connection unit 132 and the first board unit 136. As described above, the contact operation plate 130 including the connection unit 123, the first connection unit 134, and the first plate unit 136 may have a stepped structure in which the upper surface of the first plate unit 136 is higher than the upper surface of the connection unit 132.

The first plate unit 136 is a member connected to the first connecting unit 134, and applies a force directly to the first by elastically moving one of the at least one elastic member selected between the main spring 140 and the biasing spring 150. Board unit 136. The first board unit 136 can include a conductive material. A force can be applied to the first plate unit 136 by elastic movement of one of the main spring 140 and/or the biasing spring 150, and the force applied to the first plate unit 136 causes the connecting unit 132 and the first lead terminal 110 And the second lead terminal 120 is electrically disconnected or connected. When the connecting unit 132 is electrically disconnected or connected to the first lead terminal 110 and the second lead terminal 120 , the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

A support block 170 capable of supporting the first plate unit 136 may be disposed at one side surface of the outer casing 100 to be connected to the first plate unit 136. The support block 170 may be formed at one end of the outer casing 100 in one direction perpendicular to one longitudinal direction of the first plate unit 136 to support the first plate unit 136. The support block 170 is coupled to one end of the first plate unit 136 opposite to one end of the first plate unit 136 connected to the first connection unit 134. The support block 170 can have any of various shapes as long as the support block 170 can support the first plate unit 136. The support block 170 may be formed of an insulator.

The main spring 140 and the biasing spring 150 electrically connect or disconnect the first lead terminal 110 to the connecting unit 132 of the contact operating panel 130 and electrically connect the second lead terminal 120 to the connecting unit 132 of the contact operating panel 130 or Disconnected unit. The main spring 140 and the biasing spring 150 are disposed in the outer casing 100 such that they can be stretched or compressed in one direction parallel to the moving direction of one of the connecting units 132 (in one direction indicated by a solid arrow in FIG. 3). For example, the main spring 140 is disposed between the positive temperature coefficient thermistor 160 and the first plate unit 136 and is coupled to the positive temperature coefficient thermistor 160 in the outer casing 100. At a side of the first plate unit 136 opposite to one side of the first plate unit 136 in which the main spring 140 is disposed, a biasing spring 150 is disposed between the first plate unit 136 and one of the inner walls of the outer casing 100.

Specifically, the main spring 140 electrically connects or disconnects the first lead terminal 110 to the connecting unit 132 of the contact operating panel 130 and electrically connects or disconnects the second lead terminal 120 to the connecting unit 132 of the contact operating panel 130. And can be disposed between the positive temperature coefficient thermistor 160 and the first plate unit 136. In this case, when the internal temperature of the outer casing 100 is lower than a certain critical temperature (or the transition temperature of the main spring 140), the main spring 140 may be disposed between the positive temperature coefficient thermistor 160 and the first plate unit 136. In a compressed state. When the main spring 140 is compressed, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are in contact with each other and the second lead terminal 120 and the connection unit 132 contacting the operation panel 130 are in contact with each other. When the main spring 140 is stretched, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 may be separated to be electrically disconnected from each other and the connection unit 132 of the second lead terminal 120 and the contact operation panel 130 may be separated. Electrically disconnected from each other. To this end, the main spring 140 is formed of a shape memory alloy that deforms at a transition temperature or lower and returns to the original shape at a temperature greater than the transition temperature such that the main spring 140 can be heated to a transition temperature at the compressed main spring 140. Or stretch when higher. The main spring 140 may be formed of a nickel-titanium shape memory alloy which is an alloy of titanium (Ti) and nickel (Ni) or an alloy of copper (Cu), zinc (Zn), and aluminum (Al).

The biasing spring 150 together with the main spring 140 connects the first lead terminal 110 The connecting unit 132 of the touch panel 130 is electrically connected or disconnected and electrically connects or disconnects the second lead terminal 120 to the connecting unit 132 of the touch panel 130. At a side of the first plate unit 136 opposite to the side of the first plate unit 136 in which the main spring 140 is disposed, a biasing spring 150 may be disposed between the first plate unit 136 and the inner wall of the outer casing 100. In this case, unlike the main spring 140 being formed of a shape memory alloy, the biasing spring 150 may be formed of a general metal material such as stainless steel. For example, one of the bodies of the biasing spring 150 may be formed of stainless steel and then plated with silver. When the voltage supplied to one of the biasing springs 150 and a current system are maintained constant, the steady current flows through the biasing spring 150 due to the metal conductivity of the biasing spring 150 and the silver plating, but the temperature of the biasing spring 150 is It rises when it is supplied with an overvoltage or an overcurrent. As described above, the biasing spring 150 is in a tensile state (similar to a general spring) between the opposite surface of the first plate unit 136 and the inner wall of the outer casing 100 to apply pressure to the connecting unit 132 contacting the operation panel 130. It is maintained in contact with the first lead terminal 110 and the second lead terminal 120. When the main spring 140 is stretched, the biasing spring 150 may be compressed to separate the first lead terminal 110 and the second lead terminal 120 from the connecting unit 132 contacting the operation panel 130, thereby causing the first lead terminal 110 and the first lead terminal 110 The two lead terminals 120 are electrically disconnected from the connecting unit 132.

The main spring 140 in the form of a coil and the biasing spring 150 (as a spring member) may be used to manufacture the re-stable fuse for high current, but the invention is not limited thereto and the main spring 140 and/or the biasing spring 150 Can be any other type of spring, such as a plate bomb.

The positive temperature coefficient thermistor 160 is disposed at a bottom surface of the outer casing 100 to Electrically connected to the first lead terminal 110 and the second lead terminal 120. The first lead terminal 110 may contact one surface of the positive temperature coefficient thermistor 160, and the second lead terminal 120 may contact a positive temperature opposite to the surface of the positive temperature coefficient thermistor 160 contacting the first lead terminal 110. The other surface of the coefficient thermistor 160.

The positive temperature coefficient thermistor 160 is a thermistor having a positive temperature coefficient (PTC) in which a resistance value increases as the temperature rises. As described above, the positive temperature coefficient thermistor 160 exhibits self-heating characteristics.

As shown in FIG. 4, the PTC thermistor 160 according to an exemplary embodiment of the present invention may include a first electrode 162 contacting the first lead terminal 110 and a second electrode contacting the second lead terminal 120. 164 and a positive temperature coefficient element 166 having a PTC, wherein a resistor sharply increases at a particular critical temperature or higher. The positive temperature coefficient element 166 can be formed from a ceramic material or a polymeric material. The positive temperature coefficient thermistor 160 may have a plate type structure, and an insulator (not shown) may be disposed on one side surface of the positive temperature coefficient thermistor 160 to prevent a short circuit from occurring at the first electrode 162. Between the second electrode 164.

As shown in FIG. 5, one of the positive temperature coefficient thermistors 160 has a sharp change in resistance at about a critical temperature (Curie temperature).

Can be produced by the positive temperature coefficient element 166 BaTiO ₃ ceramic of tin or cerium having a predetermined content (e.g., 2 wt.% To 0.01 wt.%) Based on the mixing.

In addition, the BaTiO ₃ powder and the NbO ₃ powder may be mixed in a weight ratio of 98 to 99.95:2 to 0.05, and the resulting mixture is formed into a shape of one of a positive temperature coefficient thermistor and then the resulting mixture is obtained. The positive temperature coefficient element 166 is fabricated by baking at about 1100 ° C to about 1500 ° C for 1 hour to 12 hours.

In addition, the obtained mixture may be formed into a positive temperature coefficient heat by, for example, mixing BaTiO ₃ powder, NbO ₃ powder, and Nb ₂ O ₅ powder in a weight ratio of 98 to 99.95:2 to 0.05:0.5 to 0.01. The positive temperature coefficient element 166 is fabricated by one of the resistors in the desired shape and then the resulting mixture is baked at 1100 ° C to 1500 ° C for 1 hour to 12 hours.

As another example, the positive temperature coefficient element 166 can be formed from a polymeric material in which conductive metal particles (eg, nickel (Ni) particles) having electrical conductivity are included in the polymer matrix.

FIG. 5 illustrates the resistance characteristics of the positive temperature coefficient thermistor 160 with temperature. In general, the resistance of a positive temperature coefficient thermistor increases sharply at 80 ° C to 150 ° C. If one of the high current reversible fuses includes the positive temperature coefficient thermistor, one of the positive temperature coefficient thermistors is attributed to an overcurrent greater than a reference level or an external heating The source sharply increases when the temperature of the positive temperature coefficient thermistor rises to 80 ° C to 150 ° C, which is a critical temperature, thereby preventing current from flowing through the positive temperature coefficient thermistor. If the temperature of the positive temperature coefficient thermistor does not decrease below the critical temperature, current can be continuously prevented from flowing through the positive temperature coefficient thermistor.

In a reciprocable fuse for high current having a structure as described above, if a normal current or voltage of less than or equal to a reference level is supplied to the first lead terminal 110 or the second lead terminal 120 or the outer casing 100 internal temperature If the degree is less than a certain critical temperature, a tensile stress is applied to the biasing spring 150 and the main spring 140 remains compressed due to the tensile strength of one of the tensioned biasing springs 150, as shown in FIGS. 1 and 2 Drawn. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically connected to the connection unit 132 contacting the operation panel 130 , and the first lead terminal 110 is electrically connected to the second lead terminal 120 via the contact operation panel 130 .

In a reciprocable fuse for high current, when abnormal power (for example, a high current or voltage greater than one reference level) is supplied to the first lead terminal 110 or the second lead terminal 120, a high current is passed through A connecting unit 132 electrically connected to the lead terminal 110 and the second lead terminal 120, a first connecting unit 134 connected to the connecting unit 132, and a first board unit 136 connected to the first connecting unit 134 are supplied to the biasing spring 150 . When a high current is supplied to the biasing spring 150, the temperature of the biasing spring 150 rises due to one of the resistance values, thereby raising the internal temperature of the outer casing 100. Further, when an electric heating device or an electronic device is overheated and the internal temperature of the outer casing 100 is thus higher than a transition temperature, the temperature of the main spring 140 formed of a shape memory alloy is raised to change the main spring 140 to a tensile state. In other words, when the main spring 140 is changed to the tensile state as illustrated in FIG. 3, the first plate unit 136 contacting the operation panel 130 is one of the biasing springs 150 due to the tensile strength of the main spring 140. The orientation is compressed. Therefore, the biasing spring 150 is compressed. When the main spring 140 is stretched as described above, the connecting unit 132 contacting the operation panel 130 is moved upward due to a force applied to the first plate unit 136, and the first lead terminal 110 and the second lead terminal The connecting unit 132 of the 120 and the contact operating panel 130 are thus separated into electrical disconnects from each other. because Thus, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected to prevent current from flowing between them or the like. To this end, the tensile strength of the main spring 140 is set lower than the tensile strength of the biasing spring 150 at less than a transition (conversion) temperature and is set higher than the biasing spring at a temperature greater than the transition (conversion) temperature. 150 tensile strength.

The positive temperature coefficient thermistor 160 is formed of a ceramic or polymer material based on barium titanate (BaTiO ₃ ), and the resistance of one of the positive temperature coefficient thermistors 160 sharply increases as its temperature rises, as described above. description. The resistance of the positive temperature coefficient thermistor 160 does not gradually increase in proportion to the temperature, but sharply increases at a certain critical temperature or higher. Therefore, when the temperature of the positive temperature coefficient thermistor 160 is constantly maintained at or above the specific critical temperature, the positive temperature coefficient thermistor 160 can continuously prevent current from flowing through the positive temperature coefficient thermistor 160. Accordingly, the positive temperature coefficient thermistor 160 can be used as a switch to prevent current flow when one of the resistances changes or increases with temperature (when an overcurrent flows through the positive temperature coefficient thermistor 160). .

If abnormal power (such as overcurrent or an overvoltage greater than one reference level) is supplied to the re-fusible fuse for high current including the positive temperature coefficient thermistor 160 or if the internal temperature of the outer casing 100 is attributed to When an external heating source is raised, the main spring 140 formed of a shape memory alloy is heated and stretched, and therefore, the connecting unit 132 contacting the operation panel 130 is attributed to the pressure applied by the stretched main spring 140. The first lead terminal 110 and the second lead terminal 120 are separated. When the main spring 140 is stretched, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from the contact operation plate 130. Next, one The current path is immediately connected to the positive temperature coefficient thermistor 160 and the temperature of the positive temperature coefficient thermistor 160 is also sharply increased due to Joule heat. When the temperature of the positive temperature coefficient thermistor 160 rises to a certain critical temperature or higher, the resistance of one of the positive temperature coefficient thermistors 160 sharply increases and thus self-heats, thereby continuously compressing a tensile stress Applied to a main spring 140 formed of a shape memory alloy. Accordingly, if the temperature of the positive temperature coefficient thermistor 160 does not decrease below the specified critical temperature, current can be continuously prevented from flowing through the positive temperature coefficient thermistor 160.

Furthermore, even if abnormal power is continuously supplied to the re-stable fuse or the external heating source is maintained, the temperature of the positive temperature coefficient thermistor 160 does not decrease to less than a certain critical temperature. Therefore, one of the high temperature resistance of the positive temperature coefficient thermistor 160 is maintained and the positive temperature coefficient thermistor 160 generates heat to continuously apply a tensile stress to the main spring 140 formed of a shape memory alloy. Therefore, current cannot flow continuously through the positive temperature coefficient thermistor 160. Correspondingly, when the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from the connecting unit 132 contacting the operation panel 130 due to the stretching of the main spring 140, current can be continuously prevented from flowing through the positive temperature coefficient heat. The resistor 160 is thereby prevented from supplying power via a re-stable fuse for high current. Even if the abnormal power is continuously supplied to the re-saturated fuse for high current including the positive temperature coefficient thermistor 160 or the external heating source is continuously maintained, the current is continuously prevented from flowing through the positive temperature coefficient thermistor 160, thereby preventing Power is supplied via a re-stable fuse for high current. Accordingly, it is possible to prevent a fire or loss occurring in the electrical/electronic product due to overheating of a circuit or the like within an electrical/electrical product. effect.

If the biasing spring 150 is not stretched to return the connecting unit 132 of the contact operating panel 130 to the original position and the connecting unit 132 thus does not contact the first lead terminal 110 and the second lead terminal 120, via the high current The power supply of the repetitive fuse is completely blocked. When the overcurrent disappears or the external heating source is removed, the positive temperature coefficient thermistor 160 is cooled to stretch the biasing spring 150 and the connecting unit 132 of the operating contact plate 130 is thus returned to the original position to be electrically connected to the first A lead terminal 110 and a second lead terminal 120. Next, the allowable current flows normally through the positive temperature coefficient thermistor 160. A time delay that is substantially the same as one of the cooling periods of the positive temperature coefficient thermistor 160 occurs until normal current is allowed to flow. Accordingly, since one of the processes of automatically canceling this power cut-off state is performed in a state in which a circuit or the like is sufficiently cooled, it is possible to suppress the occurrence of failure in the re-stable fuse for high current and prevent inclusion One of the circuits in an electrical/electronic product is overheated.

According to the present embodiment, a positive temperature coefficient thermistor 160 formed of a ceramic material or a polymer material is used, wherein the higher the temperature of the positive temperature coefficient thermistor 160, the greater the resistance of one of them. In particular, one of the positive temperature coefficient thermistors 160 has a sharp increase in resistance above a certain critical temperature, thereby continuously preventing current from flowing through the positive temperature coefficient thermistor 160.

When the temperature of the positive temperature coefficient thermistor 160 rises above a certain critical temperature (at this time, an abnormal power (for example, an overcurrent or an overvoltage greater than a reference level) is supplied to the positive temperature coefficient thermistor 160 or Attributable to one At the time of the heating source, the resistance of one of the positive temperature coefficient thermistors 160 is sharply increased to continuously prevent current from flowing through the positive temperature coefficient thermistor 160. When abnormal power or the external heat source is removed, the positive temperature coefficient thermistor 160 is cooled to allow current to flow normally through the positive temperature coefficient thermistor 160.

Although a power source is connected to the second lead terminal 120 and an electrical/electronic component (eg, a circuit) is connected to the first lead terminal 110, the power source may be connected to the first lead terminal 110 and the electrical/electronic component It can be connected to the second lead terminal 120.

The operation of one of the high current reversible fuses will now be described in detail.

If normal power is supplied to an electrical/electronic component (ie, when there is no overcurrent or superheated ambient temperature), current is normally supplied to the second lead terminal 120, the connection unit 132 contacting the operation panel 130, and finally to the first Lead terminal 110. Thus, one of the reversible fuses is maintained at substantially the same resistance as a wire (e.g., about a few milliohms), thereby enabling the repeatable fuse to operate normally.

During normal operation of the re-stable fuse, the connecting unit 132 contacting the operating panel 130 is electrically connected to the first lead terminal 110 and the second lead terminal 120 due to one tensile strength of the biasing spring 150, as shown in FIG. And shown in Figure 2. When a current or a voltage less than or equal to a reference level is supplied via the second lead terminal 120, current flows through the connection unit 132 of the contact operation panel 130 via the second lead terminal 120. Since the connection unit 132 contacting the operation panel 130 is connected to the first lead terminal 110, current flows toward an electric/electronic product including one of the circuits.

If an overcurrent or an overvoltage is supplied to an electrical/electronic product, the Joule heat is generated due to the resistance value of one of the biasing springs 150, so the stretching is formed by a shape memory alloy. Spring 140. Next, the first plate unit 136 is moved upward due to the tensile strength of the main spring 140 to move the connecting unit 132 contacting the operation panel 130 upward, thereby causing the connecting unit 132 and the first lead terminal 110 and the second lead terminal 120 separation. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from each other. Since the connection unit 132 contacting the operation panel 130 is kept separated from the first lead terminal 110 and the second lead terminal 120 due to the stretching of the main spring 140, power supply to the electric/electronic product can be prevented.

When abnormal power is supplied to the re-stable fuse for high current, the biasing spring 150 is sharply heated by the Joule heat due to one of the resistance values of the biasing spring 150, and thus the operation (expansion) is formed by a shape memory alloy. Main spring 140. Therefore, as shown in FIG. 3 , the first lead terminal 110 and the second lead terminal 120 are separated from the connection unit 132 of the contact operation panel 130 , whereby the first lead terminal 110 and the second lead terminal 120 and the connection unit 132 are connected. Electrical disconnection. Therefore, a current path is connected to the positive temperature coefficient thermistor 160 via the second lead terminal 120. In this case, one of the positive temperature coefficient thermistors 160 has a resistance value in the range of several tens of milliohms to several ohms and thus is greater than a resistance value of one of the biasing springs 150 (ie, several milliohms). However, when Joule heat is generated due to an overcurrent, the resistance value of the positive temperature coefficient thermistor 160 is increased to several tens of kilohms to tens of megaohms in a few seconds. Therefore, the positive temperature coefficient thermistor 160 substantially becomes an insulator, thereby preventing the overcurrent.

The positive temperature coefficient thermistor 160 continuously self-heats before completely preventing abnormal power, and thus maintains an expanded state of one of the main springs 140 formed of a shape memory alloy. Therefore, if the abnormal power does not disappear, the connection unit 132 contacting the operation panel 130 does not return to the original state, and the connection terminals 132 of the first lead terminal 110 and the second lead terminal 120 and the contact operation panel 130 are maintained electrically each other. Disconnect, thereby continuously blocking abnormal power.

When the abnormal power disappears, the positive temperature coefficient thermistor 160 cannot self-heat and is thus naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Accordingly, a force is applied downward to the first plate unit 136. Therefore, the connection unit 132 contacting the operation panel 130 is depressed due to the force applied to the first board unit 136 and thus moved toward the first lead terminal 110 and the second lead terminal 120. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically connected to the connection unit 132 contacting the operation panel 130, thereby allowing the reversible fuse for high current to return to one of its normal operations.

When the abnormal power disappears and the positive temperature coefficient thermistor 160 is thus cooled, the tensile strength of the main spring 140 is released to remove a factor that prevents the connection unit 132 contacting the operation panel 130 from returning to the original position. Therefore, the connection unit 132 contacting the operation panel 130 returns to the original position due to the tensile strength of the biasing spring 150 and thus is connected to the first lead terminal 110 and the second lead terminal 120, thereby supplying electric power to the electric/ electronic product. When the positive temperature coefficient thermistor 160 is cooled, the main spring 140 formed of a shape memory alloy is also cooled. When the main spring 140 is cooled, the tensile strength of the main spring 140 caused by heating the main spring 140 is reduced. Main spring When the tensile strength of 140 is reduced, the main spring 140 is again compressed due to the tensile strength of the biasing spring 150. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically connected to the connection unit 132 contacting the operation panel 130. To this end, the re-stable fuse for high current can be set such that the tensile strength of the main spring 140 is higher than the tensile strength of the biasing spring 150 at a temperature greater than a transition (conversion), but when the interior of the outer casing 100 is The temperature is lowered to the transition (conversion) temperature of the main spring 140 or less, and the tensile strength of the biasing spring 150 is higher than the tensile strength of the main spring 140.

<Second embodiment>

6 is a schematic diagram of one of reversible fuses for high current according to a second exemplary embodiment of the present invention. Figure 7 is a schematic cross-sectional view of one of the repeatable fuses for high currents depicted in Figure 6. FIG. 8 is a diagram showing one of the repeatable fuses for high currents shown in FIG. 6, wherein a first lead terminal 110 and a second lead terminal 120 are electrically disconnected from each other. The components of the following embodiments that are identical to the components of the first embodiment will not be described herein.

Referring to FIGS. 6-8, the re-stable fuse for high current further includes a second side surface disposed at one of the outer casings 100, compared to the re-stable fuse for high current according to the first embodiment. A trigger terminal 180. The trigger terminal 180 is inserted into the outer casing 100 via the second side surface of the outer casing 100, and may be formed of a conductive material. The trigger terminal 180 is disposed to contact a positive temperature coefficient thermistor 160, and in particular, the trigger terminal 180 is disposed to contact one of the first electrodes 162 of the positive temperature coefficient thermistor 160.

When one of the signal voltages of about 5 volts or less is applied to the trigger terminal 180, the positive temperature coefficient thermistor 160 can self-heat to make the first lead terminal The sub-110 and the second lead terminal 120 are electrically disconnected from each other. Therefore, a remote control effect can be achieved. In other words, a signal voltage is applied from a master wafer to a safety hazard of one of the peripheral devices or one of the peripheral devices, for example, included in one of the main electronic devices or one of the microcomputers. The terminal 180 is triggered to electrically disconnect the first lead terminal 110 and the second lead terminal 120 from each other, thereby enabling the main wafer to be integrated with the safety of the control device. When the signal voltage is applied, the trigger terminal 180 can serve as a positive electrode (+) and the second lead terminal 120 can serve as a negative electrode (−) to set a voltage corresponding to the signal voltage between the trigger terminal 180 and the second lead terminal 120. A voltage difference.

One operation of one of the high current reversible fuses according to the second embodiment of the present invention will now be described.

If normal power is supplied to an electrical/electronic product (ie, when there is no overcurrent or superheated ambient temperature), the current is normally supplied to the second lead terminal 120, a contact unit 132 of the contact panel 130, and finally to The first lead terminal 110. Therefore, the resistance value of one of the repeatable fuses is maintained to be substantially the same as the resistance value of a wire (for example, about several milliohms), thereby enabling the repeatable fuse to operate normally.

During the normal operation of the re-stable fuse, the connecting unit 132 of the contact operating panel 130 is electrically connected to the first lead terminal 110 and the second lead terminal 120 due to one tensile strength of a biasing spring 150, as shown in the figure. 6 and shown in Figure 7. When a current or a voltage less than or equal to a reference level is supplied via the second lead terminal 120, current flows through the connection unit 132 of the contact operation panel 130 via the second lead terminal 120. Contact operation panel The connection unit 132 of 130 is electrically connected to the first lead terminal 110, so the current flows toward one of the electrical/electronic components including a circuit.

When one of the overheating of the surrounding environment or one of the peripheral devices is sensed via a sensor or the like, a signal voltage of about 5 volts or less is applied to the trigger terminal 180. When the signal voltage is applied, a current path is connected to the positive temperature coefficient thermistor 160 via the trigger terminal 180. Since the current flows to the positive temperature coefficient thermistor 160, the positive temperature coefficient thermistor 160 self-heats. Although one of the positive temperature coefficient thermistors 160 has a resistance value in the range of about several tens of milliohms to several ohms, Joule heat is generated due to the applied signal voltage and the positive temperature coefficient thermistor 160 The resistance value thus increases to tens of thousands of ohms to tens of megaohms in a few seconds. Therefore, the positive temperature coefficient thermistor 160 substantially becomes an insulator.

When the positive temperature coefficient thermistor 160 self-heats, a main spring 140 is stretched. Next, as shown in FIG. 8, due to one of the tensile strengths of the main spring 140, a first plate unit 136 is moved upward to move the connecting unit 132 contacting the operation panel 130 upward. Therefore, the first lead terminal 110 and the second lead terminal 120 are separated to be electrically disconnected from each other. The stretching of the main spring 140 maintains the connection unit 132 contacting the operation panel 130 from the first lead terminal 110 and the second lead terminal 120, thereby preventing power supply to the electric/electronic product.

The positive temperature coefficient thermistor 160 continuously self-heats before blocking the signal voltage via the trigger terminal 180, and thus maintains an expanded state of one of the main springs 140 formed of a shape memory alloy. Therefore, if the signal voltage is not blocked, the connection unit 132 contacting the operation panel 130 does not return to the original position. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected, thereby continuously preventing an overcurrent.

When the signal voltage is blocked, the positive temperature coefficient thermistor 160 is not self-heating and is therefore naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Accordingly, a force is applied downward to the first plate unit 136 to press down the connecting unit 132 contacting the operation panel 130. Therefore, the connecting unit 132 of the touch panel 130 is moved toward the first lead terminal 110 and the second lead terminal 120 to electrically connect the first lead terminal 110 and the second lead terminal 120 to the connecting unit 132 of the touch panel 130. This allows the repeatable fuse to return to a normal operating state.

When the signal voltage disappears and the positive temperature coefficient thermistor 160 is thus cooled, the tensile strength of the main spring 140 is released to remove a factor that prevents the connection unit 132 contacting the operation panel 130 from returning to the original position. Therefore, the connection unit 132 contacting the operation panel 130 returns to the original position due to the tensile strength of the biasing spring 150 and thus is connected to the first lead terminal 110 and the second lead terminal 120, thereby supplying electric power to the electric/ electronic product. When the positive temperature coefficient thermistor 160 is cooled, the main spring 140 formed of a shape memory alloy is also cooled. When the main spring 140 is cooled, the tensile strength of the main spring 140 caused by heating the main spring 140 is reduced and the main spring 140 is again compressed due to the tensile strength of the biasing spring 150. Therefore, the first lead terminal 110 and the second lead terminal 120 and the connection unit 132 contacting the operation panel 130 are electrically connected to each other.

<Third embodiment>

Figure 9 is a schematic illustration of one of the repeatable fuses for high current in accordance with a third exemplary embodiment of the present invention. Figure 10 is a schematic cross-sectional view of one of the repeatable fuses for high currents depicted in Figure 9.

Referring to FIGS. 9 and 10, in the reciprocal fuse for high current, a main spring 140 and a biasing spring 150 are disposed to be parallel to a moving direction of one of the connecting units 132 of one of the contact operating plates 130. Stretch or compress in one direction. The main spring 140 is disposed between the positive temperature coefficient thermistor 160 and a first plate unit 136. At a side of the first connecting unit 134 opposite to one side of the first connecting unit 134 in which the main spring 140 is disposed, the biasing spring 150 is disposed in one of the connecting unit 132 contacting the operation panel 130 and one of the outer casings 100 Between the walls. The connecting unit 132 contacting the operation panel 130 may have a flat plate-like structure.

Although not shown in the drawings, the re-stable fuse for high current according to the present embodiment may further include one of similar to the trigger terminal 180 included in the re-stable fuse for high current according to the second embodiment. Trigger terminal.

The re-stable fuse for high current according to the present embodiment has a structure in which one of the main spring 140 and the biasing spring 150 is disposed in parallel. This structure is designed to reduce the height and size of repeatable fuses for high currents to be as slim as possible. Therefore, this structure can be applied to the field of slim devices such as lithium (Li) battery packs.

In the reciprocable fuse for high current having the structure as described above, a force is directly applied to the connecting unit 132 according to elastic movement of one of the biasing springs 150, and elastically moves according to one of the main springs 140 A force is applied directly to the first plate unit 136. According to the main spring 140 and the biasing spring 150 The elastic movement causes the connecting unit 132 to be electrically connected or disconnected from the first lead terminal 110 and the second lead terminal 120. When the connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 and the second lead terminal 120 , the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

The main spring 140 is configured to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 to the first lead terminal 110 and the second lead terminal 120, and can be disposed on the positive temperature coefficient thermistor 160 and the first board. Between units 136. When the main spring 140 is compressed, the connection unit 132 contacting the operation panel 130 contacts the first lead terminal 110 and the second lead terminal 120. When the main spring 140 is stretched, the connecting unit 132 contacting the operation panel 130 is separated from the first lead terminal 110 and the second lead terminal 120 to be electrically disconnected from the first lead terminal 110 and the second lead terminal 120.

The biasing spring 150 together with the main spring 140 electrically connects or disconnects the connecting unit 132 of the contact operating panel 130 with the first lead terminal 110 and the second lead terminal 120. At the side of the first connection unit 134 opposite to the side where the first connection unit 134 of the main spring 140 is disposed, the biasing spring 150 may be disposed between the connection unit 132 contacting the operation panel 130 and the inner wall of the outer casing 100. At the opposite side of the first connecting unit 134, the biasing spring 150 may be disposed in a tensile state between the connecting unit 132 contacting the operating panel 130 and the inner wall of the outer casing 100 such that the connecting unit 132 contacting the operating panel 130 It may be pressed to maintain contact with the first lead terminal 110 and the second lead terminal 120. When the main spring 140 is stretched, the biasing spring 150 is compressed to separate the first lead terminal 110 and the second lead terminal 120 from the connection unit 132 contacting the operation panel 130 to be disconnected from the connection unit 132.

In a reciprocable fuse for high current, when abnormal power (for example, a current or voltage greater than a reference level) is supplied to the first lead terminal 110 or the second lead terminal 120, a high current is passed through with the first The lead terminal 110 and the second lead terminal 120 are electrically connected to the connection unit 132 to be supplied to the biasing spring 150. When the high current is supplied to the biasing spring 150, the temperature of the biasing spring 150 rises due to one of the resistance values thereof, thereby raising the internal temperature of the outer casing 100. Further, when the internal temperature of the outer casing 100 becomes higher than a transition temperature due to abnormal overheating of an electric heating device or an electronic instrument, the temperature of the main spring 140 formed of a shape memory alloy rises to bring the main spring 140 Change to a tensile state. In other words, when the main spring 140 is changed to the tensile state, the first plate unit 136 contacting the operation panel 130 is pressed due to the tensile strength of the main spring 140. Further, when the main spring 140 is in the tensile state, the connecting unit 132 contacting the operation panel 130 is moved upward by the force applied to the first plate unit 136. Then, the first lead terminal 110 and the second lead terminal 120 are separated from the connecting unit 132 of the contact operating panel 130 to be electrically disconnected from the connecting unit 132. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from each other, thereby preventing current flow between them or the like.

When the abnormal power disappears, the positive temperature coefficient thermistor 160 cannot self-heat and is thus naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Therefore, a force is directly applied downward to the connecting unit 132 to move the connecting unit 132 toward the first lead terminal 110 and the second lead terminal 120. Correspondingly, the first lead terminal 110, the second lead terminal 120, and the connecting unit 132 contacting the operation panel 130 are electrically connected to each other, thereby allowing The high current reciprocal fuse returns to a normal operating state.

<Fourth embodiment>

FIG. 11 is a schematic diagram showing one of reversible fuses for high current according to a fourth exemplary embodiment of the present invention. Figure 12 is a schematic cross-sectional view of one of the repeatable fuses for high currents depicted in Figure 11.

Referring to FIG. 11 and FIG. 12, a contact operating panel 130 includes: a connecting unit 132 having electrical conductivity and disposed to contact a first lead terminal 110 and a second lead terminal 120; a first connecting unit 134 Connected to the connecting unit 132; a first plate unit 136 having a plate-like shape and connected to the first connecting unit 134, and applying a force directly to the first plate unit according to a tensile strength of a main spring 140 a second connecting unit 137 connected to the first board unit 136; and a second board unit 138 having a plate shape and combined with the second connecting unit 137, and according to one of the biasing springs 150 The tensile strength is applied directly to the second plate unit 138. In this case, a support block 170 is coupled to the second plate unit 138 to support the contact operation panel 130. The support block 170 is connected to the other end of the second plate unit 138 opposite to one end of the second plate unit 138 connected to the second connection unit 137. The re-stable fuse for high current according to the present embodiment has a structure in which one of the main spring 140 and the biasing spring 150 is disposed in parallel. This structure is designed to reduce the height and size of repeatable fuses for high currents to be as slim as possible. Therefore, this structure can be applied to the field of slim devices such as lithium (Li) battery packs.

Although not shown in the drawings, the re-stable fuse for high current according to the present embodiment may further comprise and be included in the high-voltage according to the second embodiment. The trigger terminal 180 in the reflowable fuse is similar to one of the trigger terminals.

A force is applied to the first plate unit 136 according to one of the elastic movements of the main spring 140. A force is applied to the second plate unit 138 in accordance with the elastic movement of one of the biasing springs 150. The main spring 140 is disposed between a positive temperature coefficient thermistor 160 and the first plate unit 136. At a side of the second connecting unit 137 opposite to one side of the second connecting unit 137 in which the main spring 140 is disposed, the biasing spring 150 is disposed between the second plate unit 138 and an inner wall of one of the outer casings 100. The connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 and the second lead terminal 120 due to the force applied to the first board unit 136 and the second board unit 138.

In the reciprocable fuse for high current having the structure as described above, a force is directly applied to the first plate unit 136 according to elastic movement of one of the main springs 140, and is elastic according to one of the biasing springs 150 Moving is applied directly to the second panel unit 138. The connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 and the second lead terminal 120 according to the elastic movement of the main spring 140 and the biasing spring 150. When the connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 and the second lead terminal 120 , the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

The main spring 140 is used to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 to the first lead terminal 110 and the second lead terminal 120. The main spring 140 may be disposed between the positive temperature coefficient thermistor 160 and the first plate unit 136. When the main spring 140 is compressed, the connection unit 132 contacting the operation panel 130 may contact the first lead terminal 110 and the second lead terminal 120. When the main spring 140 is stretched, the connecting unit 132 contacting the operation panel 130 can be The first lead terminal 110 and the second lead terminal 120 are separated to be electrically disconnected from the first lead terminal 110 and the second lead terminal 120.

The biasing spring 150 is used together with the main spring 140 to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 with the first lead terminal 110 and the second lead terminal 120. At a side of the second connection unit 137 opposite to one side of the second connection unit 137 in which the main spring 140 is disposed, the biasing spring 150 may be disposed between the second plate unit 138 and the inner wall of the outer casing 100. At the opposite side of the second connecting unit 137, the biasing spring 150 can be disposed in a tensile state between the second plate unit 138 and the inner wall of the outer casing 100 such that the connecting unit 132 contacting the operating panel 130 can be applied The pressure is maintained in contact with the first lead terminal 110 and the second lead terminal 120. When the main spring 140 is stretched, the biasing spring 150 is compressed to separate the first lead terminal 110 and the second lead terminal 120 from the connection unit 132 contacting the operation panel 130, thereby causing the first lead terminal 110 and the second The lead terminal 120 is electrically disconnected from the connecting unit 132.

In a reciprocable fuse for high current, when abnormal power (for example, a current or voltage greater than a reference level) is supplied to the first lead terminal 110 or the second lead terminal 120, a high current is passed through with the first The connection unit 132 electrically connected to the lead terminal 110 and the second lead terminal 120, the first connection unit 134, the first plate unit 136, the second connection unit 137, and the second plate unit 138 are supplied to the biasing spring 150. When the high current is supplied to the biasing spring 150, the temperature of the biasing spring 150 rises due to one of the resistance values thereof, thereby raising the internal temperature of the outer casing 100. Further, when the internal temperature of the outer casing 100 becomes higher than a transition temperature due to abnormal overheating of an electric heating device or an electronic device, the temperature of the main spring 140 formed of a shape memory alloy Raised to change the main spring 140 to a tensile state. In other words, when the main spring 140 is changed to the tensile state, the first plate unit 136 contacting the operation panel 130 is pressed due to the tensile strength of the main spring 140. Further, when the main spring 140 is in the tensile state, the connecting unit 132 contacting the operation panel 130 is moved upward by the force applied to the first plate unit 136. Then, the first lead terminal 110 and the second lead terminal 120 are separated from the connecting unit 132 of the contact operating panel 130 to be electrically disconnected from the connecting unit 132. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from each other, thereby preventing current flow between them or the like.

When the abnormal power disappears, the positive temperature coefficient thermistor 160 cannot self-heat and is thus naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Therefore, a force is directly applied downward to the connecting unit 132 to move the connecting unit 132 toward the first lead terminal 110 and the second lead terminal 120. Accordingly, the first lead terminal 110, the second lead terminal 120, and the connection unit 132 contacting the operation panel 130 are electrically connected to each other, thereby allowing the reversible fuse for high current to return to a normal operation state.

<Fifth Embodiment>

FIG. 13 is a schematic diagram showing one of reversible fuses for high current according to a fifth exemplary embodiment of the present invention. Figure 14 is a schematic cross-sectional view of one of the repeatable fuses for high currents depicted in Figure 13.

Referring to FIGS. 13 and 14, in the reciprocal fuse for high current, a first opening 104 is formed in one of the first side surfaces of the outer casing 100 and a second opening (not shown) is formed in the outer casing. One of the second side surfaces of 100. First The lead terminal 110 and the second lead terminal 120 are inserted into the outer casing 100 via the first opening 104 and the second opening, respectively. A contact operating panel 130 is disposed to be electrically connected to the second lead terminal 120 and electrically connected and disconnected from the first lead terminal 110. The first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other via the contact operation panel 130.

When the internal temperature of the outer casing 100 rises to be higher than a transition temperature of a shape memory alloy due to an overcurrent greater than a reference level or an external superheat factor, the tensile strength of the main spring 140 becomes higher than the bias temperature. The tensile strength of the compression spring 150 and the contact operation plate 130 are thus separated from the first lead terminal 110, whereby the contact operation plate 130 is electrically disconnected from the first lead terminal 110. Therefore, current is prevented from flowing between the first lead terminal 110 and the second lead terminal 120. When a factor causing the overcurrent or the external superheat factor is removed to lower the internal temperature of the outer casing 100 below a certain critical temperature, the positive temperature coefficient thermistor 160 is cooled to reduce the main spring 140 tensile strength. Therefore, the tensile strength of the main spring 140 becomes smaller than the tensile strength of the bias spring 150. Due to the tensile strength of the biasing spring 150, the contact operating plate 130 is pressed toward the first lead terminal 110, whereby the first lead terminal 110 and the second lead terminal 120 are electrically connected to each other.

When an overcurrent is supplied to the re-stable fuse, the biasing spring 150 is heated to stretch (expand) the main spring 140, and the first lead terminal 110 and the contact operation plate 130 are thus separated to be electrically disconnected from each other. Then, an overcurrent flows to the positive temperature coefficient thermistor 160 and the positive temperature coefficient thermistor 160 is thus self-heated to continuously maintain the main spring 140 at a high temperature (for example, 110 ° C or higher). Correspondingly, the first lead terminal 110 and the contact operation panel 130 are dimensioned They are electrically disconnected from each other.

However, when the factor causing the overcurrent is removed and the overcurrent does not flow, the positive temperature coefficient thermistor 160 stops self-heating and is thus cooled, the tensile strength of the main spring 140 decreases, and then, the operation panel 130 is contacted. The pressure is applied toward the first lead terminal 110 due to the tensile strength of the biasing spring 150. Accordingly, the first lead terminal 110 and the contact operation panel 130 are returned to be electrically connected to each other.

The first opening 104 is formed in the first side surface of the outer casing 100, and the first lead terminal 110 is inserted into the outer casing 100 via the first opening 104. The second opening is formed in the second side surface of the outer casing 100, and the second lead terminal 120 is inserted into the outer casing 100 via the second opening.

The first lead terminal 110 is disposed to be connected to the positive temperature coefficient thermistor 160, and in particular, the first lead terminal 110 is disposed to be connected to the first electrode 162 of the positive temperature coefficient thermistor 160.

The second lead terminal 120 is inserted into the outer casing 100 via a second opening formed in the second side surface of the outer casing 100 and is disposed to be electrically connected to the contact operation plate 130. More specifically, the second lead terminal 120 is electrically connected to the first board unit 136 of the contact operation panel 130 via a first terminal connection unit 126. The second lead terminal 120 is disposed to be connected to one surface (second electrode 164) of the positive temperature coefficient thermistor 160 opposite to a surface of the positive temperature coefficient thermistor 160 contacting the first lead terminal 110.

The first lead terminal 110 is electrically connected or disconnected from the second lead terminal 120 via the contact operation panel 130 . The contact operation panel 130 may include: a connection unit 132 that contacts the first lead terminal 110; a first connection unit 134, Connected to the connecting unit 132; and a first plate unit 136 connected to the first connecting unit 134, and according to a tensile strength selected from one of the elastic members of the at least one elastic member between the main spring 140 and the biasing spring 150 The force is applied directly to the first plate unit 136.

The connecting unit 132 can be electrically connected or disconnected from the first contact unit 112 of the first lead terminal 110, and can have a flat plate shape. A plurality of first contact units 112 that are sufficiently electrically connected to the first lead terminals 110 may be formed. When a plurality of first contact units 112 are placed in parallel, a point contact resistance is reduced to increase a current capacity. The larger the number of the first contact units 112, the larger the current capacity. When the connecting unit 132 is electrically connected or disconnected from the first contact unit 112 of the first lead terminal 110, the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

A support block 170 is formed at one side surface of the outer casing 100 to support the second lead terminal 120. A second opening can be formed through the support block 170.

The main spring 140 and the biasing spring 150 are units for electrically connecting or disconnecting the first lead terminal 110 and the connecting unit 132 contacting the operation panel 130 to each other.

The main spring 140 is used to electrically connect or disconnect the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 to each other, and may be disposed between the PTC thermistor 160 and the first board unit 136. In this case, when the internal temperature of the outer casing 100 is lower than a certain critical temperature (or a transition temperature of the main spring 140), the main spring 140 may be between the positive temperature coefficient thermistor 160 and the first plate unit 136. Placed in a compressed state. When the main spring 140 is compressed, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are in contact with each other. When the main spring 140 is stretched, the first lead end The connecting unit 132 of the sub-110 and the contact operating panel 130 can be separated to be electrically disconnected from each other.

The biasing spring 150 is used together with the main spring 140 to electrically connect or disconnect the first lead terminal 110 and the connecting unit 132 contacting the operation panel 130 to each other. At a side of the first plate unit 136 opposite to one side of the first plate unit 136 in which the main spring 140 is disposed, a biasing spring 150 may be disposed between the first plate unit 136 and one of the inner walls of the outer casing 100. The biasing spring 150 is in a tensile state between the opposite side of the first plate unit 136 and the inner wall of the outer casing 100 to press the contact unit 132 contacting the operation plate 130 to maintain contact with the first lead terminal 110. . When the main spring 140 is stretched, the biasing spring 150 can be compressed to separate the first lead terminal 110 from the connecting unit 132 contacting the operation panel 130, thereby electrically disconnecting the first lead terminal 110 from the connecting unit 132. .

In a reciprocable fuse for high current having a structure as described above, if a normal current or voltage less than or equal to a reference level is supplied to the first lead terminal 110 or the second lead terminal 120 or the outer casing 100 If the internal temperature is less than or equal to a certain critical temperature, then a tensile stress is applied to the biasing spring 150 and the primary spring 140 remains compressed due to the tensile strength of one of the tensioned biasing springs 150. Therefore, the first lead terminal 110 is electrically connected to the connection unit 132 contacting the operation panel 130 , and the first lead terminal 110 is electrically connected to the second lead terminal 120 via the contact operation panel 130 .

In a reciprocable fuse for high current, when abnormal power (for example, a current or voltage greater than a reference level) is supplied to the first lead terminal 110 or the second lead terminal 120, a high current is passed through with the first Lead terminal 110 electrical a connecting connecting unit 132, a first connecting unit 134 connected to the connecting unit 132, a first board unit 136 connected to the first connecting unit 134 or a first terminal connecting unit 126 connected to the second lead terminal 120 and A first connection unit 126 is connected to the first plate unit 136 to be supplied to the biasing spring 150. When the high current is supplied to the biasing spring 150, the temperature of the biasing spring 150 rises due to one of the resistance values thereof, thereby raising the internal temperature of the outer casing 100. In addition, when the internal temperature of the outer casing 100 is higher than the transition temperature due to abnormal overheating of an electric heating device or an electronic instrument, the temperature of the main spring 140 formed of a shape memory alloy is raised to change the main spring 140. Into a state of tension. When the main spring 140 is changed to the tensile state, the first plate unit 136 contacting the operation panel 130 is pressed toward the biasing spring 150 due to the tensile strength of the main spring 140. Therefore, the biasing spring 150 is compressed. When the main spring 140 is changed to the tensile state, the connection unit 132 contacting the operation panel 130 is moved upward by the force applied to the first plate unit 136 to connect the first lead terminal 110 and the connection unit 132 contacting the operation panel 130. Separating, thereby electrically disconnecting the first lead terminal 110 and the connecting unit 132 from each other. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from each other, thereby preventing current flow between them or the like.

If abnormal power is supplied (for example, one over-current or one over-voltage is greater than one reference level) to a re-suppressable fuse for high current (which includes positive temperature coefficient thermistor 160) or if the internal temperature of the outer casing 100 is As a result of an external heating source, the temperature of the main spring 140 formed by a shape memory alloy rises to stretch the main spring. Due to the pressure applied by the stretched main spring 140, the connecting unit 132 contacting the operation panel 130 is separated from the first lead terminal 110 from. When the main spring 140 is stretched, the first lead terminal 110 and the contact operation plate 130 are electrically disconnected from each other. Next, a current path is directly connected to the positive temperature coefficient thermistor 160 and the temperature of the positive temperature coefficient thermistor 160 rises sharply due to Joule heat. When the temperature of the positive temperature coefficient thermistor 160 rises to a certain critical temperature or higher, the resistance of one of the positive temperature coefficient thermistors 160 sharply increases and the positive temperature coefficient thermistor 160 is thus self-heating A tensile stress is continuously applied to the main spring 140 formed of a shape memory alloy. Therefore, if the temperature of the positive temperature coefficient thermistor 160 does not decrease below the specific critical temperature, the current flow through the positive temperature coefficient thermistor 160 can be continuously prevented.

Even if abnormal power is continuously supplied or an external heating source is continuously maintained, the temperature of the positive temperature coefficient thermistor 160 does not decrease to less than a certain critical temperature. Therefore, the high resistance of one of the positive temperature coefficient thermistors 160 remains constant, and the positive temperature coefficient thermistor 160 self-heats to maintain the main spring 140 formed of a shape memory alloy in the tensile state. Therefore, current is continuously prevented from flowing through the positive temperature coefficient thermistor 160. Accordingly, when the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are electrically disconnected from each other due to the stretching of the main spring 140, current is continuously prevented from flowing through the positive temperature coefficient thermistor 160, This prevents power supply via re-stable fuses for high currents.

If the connection unit 132 contacting the operation panel 130 does not return to the original position and thus does not contact the first lead terminal 110 (due to the stretching of the biasing spring 150), power supply via the re-stable fuse for high current Was completely blocked. Positive temperature coefficient heat when an overcurrent disappears or an external heat source is removed The sense resistor 160 is cooled to stretch the bias spring 150 and the connection unit 132 contacting the operation panel 130 is thus returned to the original position to be electrically connected to the first lead terminal 110. Next, the allowable current flows normally through the positive temperature coefficient thermistor 160. A time delay that is substantially the same as one of the cooling periods of the positive temperature coefficient thermistor 160 occurs until the current is allowed to flow normally. Accordingly, since one of the processes of automatically canceling this power cut-off state is performed in a state in which a circuit or the like is sufficiently cooled, it is possible to suppress the occurrence of failure in the re-stable fuse for high current and prevent inclusion One of the circuits in an electrical/electronic product is overheated.

Although a power source is connected to the second lead terminal 120 and an electrical/electronic component (eg, a circuit) is connected to the first lead terminal 110, the power source can be connected to the first lead terminal 110 and the electrical/electronic product It can be connected to the second lead terminal 120.

The operation of the reciprocal fuse for high current according to the fifth embodiment will now be described in detail.

If normal power is supplied to an electrical/electronic product (ie, when there is no overcurrent or ambient temperature of overheating), current is normally supplied to the second lead terminal 120, the first terminal connection unit 126, and the first board unit 136. The first connection unit 134, the connection unit 132, and finally to the first lead terminal 110. Thus, one of the reversible fuses is maintained in substantially the same electrical resistance as a wire (e.g., about a few milliohms), thereby enabling the repeatable fuse to operate normally.

During normal operation of the repeatable fuse, the connection unit 132 contacting the operation panel 130 is electrically connected to the first due to the tensile strength of the biasing spring 150. Lead terminal 110. When a current or a voltage less than or equal to a reference level is supplied via the second lead terminal 120, current flows to the connection unit 132 of the contact operation panel 130 via the second lead terminal 120. Since the connection unit 132 contacting the operation panel 130 is electrically connected to the first lead terminal 110, current flows to one of the electrical/electronic components including a circuit.

If an overcurrent or an overvoltage greater than a reference level is supplied to an electrical/electronic product, Joule heat is generated due to a resistance value of the biasing spring 150 to stretch the main spring formed by a shape memory alloy 140. Next, the first plate unit 136 is moved upward due to the tensile strength of the main spring 140 to move the connecting unit 132 contacting the operation panel 130 upward. Therefore, the connection unit 132 is separated from the first lead terminal 110 and thus electrically disconnected from the first lead terminal 110. Due to the stretching of the main spring 140, the connection unit 132 contacting the operation panel 130 is maintained to be separated from the first lead terminal 110, thereby preventing power supply to the electric/electronic product.

When abnormal power is supplied, the Joule heat due to the resistance of one of the biasing springs 150 causes the biasing spring 150 to be heated abruptly, thus operating (expanding) the main spring 140 formed of a shape memory alloy. Therefore, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are separated to be electrically disconnected from each other. Therefore, a current path is connected to the positive temperature coefficient thermistor 160 via the second lead terminal 120. In this case, the resistance value of the positive temperature coefficient thermistor 160 is in the range of about several tens of milliohms to several ohms and is therefore greater than the resistance value of the biasing spring 150 (i.e., several milliohms). However, since Joule heat is generated due to an overcurrent, the resistance value of the positive temperature coefficient thermistor 160 is increased to several tens of kilo ohms to several tens of mega ohms in a few seconds. Therefore, the positive temperature system The number thermistor 160 essentially becomes an insulator, thereby preventing overcurrent.

The positive temperature coefficient thermistor 160 continuously self-heats before completely preventing the overcurrent, and thus maintains an expanded state of the main spring 140 formed of a shape memory alloy. Therefore, if the abnormal power does not disappear, the connection unit 132 contacting the operation panel 130 does not return to the original position and thus is maintained to be electrically disconnected from the first lead terminal 110, thereby continuously preventing the overcurrent.

When the abnormal power disappears, the positive temperature coefficient thermistor 160 cannot self-heat and is thus naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Therefore, a force is applied downward to the first plate unit 136 to press down the connection unit 132 contacting the operation panel 130 in accordance with the force applied to the first plate unit 136. Accordingly, the connecting unit 132 is moved toward the first lead terminal 110 to be electrically connected to the first lead terminal 110, thereby allowing the re-stable fuse for high current to return to a normal operating state.

When the overcurrent disappears and the positive temperature coefficient thermistor 160 is thus cooled, the tensile strength of the main spring 140 is released to remove a factor that prevents the connection unit 132 contacting the operation panel 130 from returning to the original position. Therefore, the connection unit 132 contacting the operation panel 130 returns to the original position due to the tensile strength of the biasing spring 150 and thus is connected to the first lead terminal 110, thereby supplying electric power to the electric/electronic product. When the positive temperature coefficient thermistor 160 is cooled, the main spring 140 formed of a shape memory alloy is also cooled. When the main spring 140 is cooled, the tensile strength of the main spring 140 caused by heating the main spring 140 is reduced and the main spring 140 is attributed to the biasing spring 150. The tensile strength is again compressed. Therefore, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are electrically connected to each other.

<Sixth embodiment>

FIG. 15 is a schematic diagram showing one of reversible fuses for high current according to a sixth exemplary embodiment of the present invention. The components of the following embodiments that are identical to the components of the fifth embodiment will not be described herein.

Referring to FIG. 15, the re-stable fuse for high current further includes one of the trigger terminals 180 disposed at one of the third side surfaces of the outer casing 100, compared to the re-stable fuse for high current according to the previous embodiment. . The trigger terminal 180 may be inserted into the outer casing 100 via the third side surface of the outer casing 100 and may be formed of a conductive material. The trigger terminal 180 is disposed to contact a positive temperature coefficient thermistor 160, and in particular, the trigger terminal 180 is disposed to contact one of the first electrodes 162 of the positive temperature coefficient thermistor 160.

When a signal voltage of about 5 volts or less is applied to the trigger terminal 180, the positive temperature coefficient thermistor 160 can self-heat to electrically disconnect a first lead terminal 110 and a second lead terminal 120 from each other. . Therefore, a remote control effect can be achieved. In other words, a signal voltage is applied from a master wafer to a safety hazard of one of the peripheral devices or a peripheral device, for example, via one of the main processors or one of the microcomputers included in any of the various electronic devices. The terminal 180 is triggered to electrically disconnect the first lead terminal 110 and the second lead terminal 120 from each other, thereby enabling the main wafer to be integrated with the safety of the control device. When the signal voltage is applied, the trigger terminal 180 can serve as a positive (+) and the second lead terminal 120 can serve as a negative (-) to set a signal voltage pair between the trigger terminal 180 and the second lead terminal 120. Should be one of the voltage differences.

One operation of the re-stripable fuse for high current according to the sixth embodiment will now be described.

When normal power is supplied to an electrical/electronic product (ie, when there is no overcurrent or superheated ambient temperature), the current is normally supplied to the second lead terminal 120, a first terminal connection unit 126, and a first board unit. 136. A first connecting unit 134, a connecting unit 132 and finally to the first lead terminal 110. Thus, one of the reversible fuses is maintained at substantially the same resistance as a wire (e.g., about a few milliohms), thereby enabling the repeatable fuse to operate normally.

During normal operation of the repeatable fuse, a connecting unit 132 of the contact operating panel 130 is electrically connected to the first lead terminal 110 due to a tensile strength of a biasing spring 150. When a current or voltage less than or equal to a reference level is supplied via the second lead terminal 120, current flows to the connection unit 132 of the contact operation panel 130 via the second lead terminal 120. Since the connection unit 132 contacting the operation panel 130 is electrically connected to the first lead terminal 110, current flows to one of the electrical/electronic components including a circuit.

When one of the overheating of the surrounding environment or one of the peripheral devices is sensed via a sensor or the like, a signal voltage of about 5 volts or less is applied from a main wafer to the trigger terminal 180. When the signal voltage is applied, a current path is connected to the positive temperature coefficient thermistor 160 via the trigger terminal 180. Since the current flows to the positive temperature coefficient thermistor 160, the positive temperature coefficient thermistor 160 self-heats. Although one of the positive temperature coefficient thermistors 160 has a resistance value ranging from about several tens of milliohms to several ohms, The Joule heat is generated due to the applied signal voltage and the resistance value of the positive temperature coefficient thermistor 160 thus increases to several tens of kilo ohms to tens of mega ohms in a few seconds. Therefore, the positive temperature coefficient thermistor 160 substantially becomes an insulator.

When the positive temperature coefficient thermistor 160 self-heats to stretch a main spring 140, the first plate unit 136 moves upward due to one of the tensile strengths of the main spring 140. Next, the connection unit 132 contacting the operation panel 130 is moved upward to be separated from the first lead terminal 110 and thus electrically disconnected from the first lead terminal 110. Due to the stretching of the main spring 140, the connection unit 132 contacting the operation panel 130 is maintained to be separated from the first lead terminal 110, thereby preventing power supply to the electric/electronic product.

The positive temperature coefficient thermistor 160 continuously self-heats before blocking the signal voltage applied via the trigger terminal 180, and thus maintains an expanded state of the main spring 140 formed of a shape memory alloy. Therefore, if the signal voltage is not blocked, the connection unit 132 contacting the operation panel 130 does not return to the original position and the connection terminals 132 of the first lead terminal 110 and the contact operation panel 130 are electrically disconnected from each other, thereby Continuously block an overcurrent.

When the signal voltage is blocked, the positive temperature coefficient thermistor 160 is not self-heating and is therefore naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Therefore, a force is applied downward to the first plate unit 136 to press down the connection unit 132 contacting the operation panel 130 in accordance with the force applied to the first plate unit 136. Therefore, the connection unit 132 moves toward the first lead terminal 110 to be electrically connected to the first lead terminal 110, thereby allowing for high current The repeatable fuse returns to a normal operating state.

When the signal voltage disappears and the positive temperature coefficient thermistor 160 is thus cooled, the tensile strength of the main spring 140 is released to remove a factor that prevents the connection unit 132 contacting the operation panel 130 from returning to the original position. Therefore, the connection unit 132 contacting the operation panel 130 returns to the original position due to the tensile strength of the biasing spring 150 and thus is connected to the first lead terminal 110, thereby supplying electric power to the electric/electronic product. When the positive temperature coefficient thermistor 160 is cooled, the main spring 140 formed of a shape memory alloy is also cooled. When the main spring 140 is cooled, the tensile strength of the main spring 140 caused by heating the main spring 140 is reduced. When the tensile strength of the main spring 140 is reduced, the main spring 140 is again compressed due to the tensile strength of the biasing spring 150. Therefore, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are electrically connected to each other.

<Seventh embodiment>

Figure 16 is a schematic diagram showing one of reversible fuses for high current in accordance with a seventh exemplary embodiment of the present invention. Figure 17 is an enlarged view of one of the line contact unit 116 and a contact operating panel 130, in accordance with an exemplary embodiment of the present invention.

Referring to FIGS. 16 and 17, a first lead terminal 110 includes a line contact unit 116 having a rod shape protruding upward to increase a contact area between the first lead terminal 110 and the contact operation plate 130. One of the contact operating plates 130 of the contact line contact unit 116 may have a plate shape.

The connection unit 132 can be electrically connected to the line contact unit 116 of the first lead terminal 110 Sexually connected or disconnected, and may have a flat plate shape. When the connecting unit 132 is electrically connected or disconnected from the line contact unit 116 of the first lead terminal 110, the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

Although not shown in the drawings, the re-stable fuse for high current according to the present embodiment may further include one of similar to the trigger terminal 180 included in the re-stable fuse for high current according to the sixth embodiment. Trigger terminal.

<Eighth Embodiment>

FIG. 18 is a schematic diagram showing one of reversible fuses for high current according to an eighth exemplary embodiment of the present invention.

Referring to FIG. 18, in the reciprocal fuse for high current, a main spring 140 and a biasing spring 150 are disposed to be pulled in one direction parallel to the moving direction of one of the connecting units 132 of one of the contact operating plates 130. Stretch or compress. The main spring 140 is disposed between a positive temperature coefficient thermistor 160 and a first plate unit 136. At one side of the first connection unit 134 opposite to one side of the first connection unit 134 in which the main spring 140 is disposed, the biasing spring 150 is disposed to contact the connection unit 132 of the operation panel 130 and the inner wall of one of the outer casings 100 between. The connecting unit 132 contacting the operation panel 130 may have a plate shape. The re-stable fuse for high current according to the present embodiment has a structure in which one of the main spring 140 and the biasing spring 150 is disposed in parallel. This structure is designed to reduce the height and size of repeatable fuses for high currents to be as slim as possible. Therefore, this structure can be applied to the field of slim devices such as lithium (Li) battery packs.

The first lead terminal 110 is disposed to contact the positive temperature coefficient thermistor 160, and in particular, the first lead terminal 110 is disposed to contact one of the first electrodes 162 of the positive temperature coefficient thermistor 160.

The second lead terminal 120 is inserted into the outer casing 100 via a second opening (not shown) formed in one of the second side surfaces of the outer casing 100 to be electrically connected to the contact operation panel 130. More specifically, the second lead terminal 120 is connected to the first board unit 136 that contacts the operation panel 130 to be electrically connected to the first board unit 136. The second lead terminal 120 is disposed to be connected to one of the positive temperature coefficient thermistors 160 opposite to one surface of the positive temperature coefficient thermistor 160 contacting the first lead terminal 110 via a second terminal connection unit 128 Surface (second electrode 164).

Although not shown in the drawings, the re-stable fuse for high current according to the present embodiment may further include one of the trigger terminals similar to the trigger terminal 180 included in the re-stable fuse according to the sixth embodiment.

In the reciprocable fuse for high current having the structure described above, a force is directly applied to the connecting unit 132 according to elastic movement of one of the biasing springs 150, and according to elastic movement of one of the main springs 140 A force is applied directly to the first plate unit 136. The connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 according to the elastic movement of the main spring 140 and the biasing spring 150. When the connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 , the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

The main spring 140 is used to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 to the first lead terminal 110 and may be disposed between the PTC thermistor 160 and the first board unit 136. When the main spring 140 is pressed In a contracted manner, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are in contact with each other. When the main spring 140 is stretched, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 may be separated to be electrically disconnected from each other.

The biasing spring 150 is used together with the main spring 140 to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 to the first lead terminal 110. At the side of the first connection unit 134 opposite to the side where the first connection unit 134 of the main spring 140 is disposed, the biasing spring 150 may be disposed between the connection unit 132 contacting the operation panel 130 and the inner wall of the outer casing 100. At the opposite side of the first connecting unit 134, the biasing spring 150 may be disposed in a tensile state between the connecting unit 132 contacting the operating panel 130 and the inner wall of the outer casing 100 such that the connecting unit 132 contacting the operating panel 130 It is pressed to maintain contact with the first lead terminal 110. When the main spring 140 is stretched, the biasing spring 150 is compressed to separate the first lead terminal 110 from the connecting unit 132 contacting the operation panel 130, thereby electrically disconnecting the first lead terminal 110 from the connecting unit 132.

In a reciprocable fuse for high current, when abnormal power (for example, current or voltage higher than a reference level) is supplied to the first lead terminal 110 or the second lead terminal 120, a high current is passed through A lead terminal 110 is electrically connected to the connection unit 132 to be supplied to the biasing spring 150. When the high current is supplied to the biasing spring 150, the temperature of the biasing spring 150 rises due to one of the resistance values thereof, thereby raising the internal temperature of the outer casing 100. Further, when the internal temperature of the outer casing 100 becomes higher than a transition temperature due to abnormal overheating of an electric heating device or an electronic instrument, the temperature of the main spring 140 formed of a shape memory alloy rises to bring the main spring 140 Change to a tensile state. In other words, when the main spring 140 is changed to the tensile state, the contact operation The first plate unit 136 of the plate 130 is pressed due to the tensile strength of the main spring 140. Further, when the main spring 140 is in the tensile state, the connecting unit 132 contacting the operation panel 130 is moved upward by the force applied to the first plate unit 136. Next, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are separated to be electrically disconnected from each other. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from each other, thereby preventing current flow between them or the like.

When the abnormal power disappears, the positive temperature coefficient thermistor 160 cannot self-heat and is thus naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Therefore, a force is applied directly downward to the connection unit 132 to move the connection unit 132 toward the first lead terminal 110. Accordingly, the first lead terminal 110 is electrically connected to the connection unit 132 of the contact operation panel 130, thereby allowing the re-stable fuse for high current to return to a normal operation state.

<Ninth embodiment>

FIG. 19 is a schematic diagram showing one of reversible fuses for high current according to a ninth exemplary embodiment of the present invention.

Referring to FIG. 19, a contact operating panel 130 includes a connecting unit 132, a first connecting unit 134, a first board unit 136, a second connecting unit 137, and a second board unit 138. The connection unit 132 is a conductive unit that contacts one of the first lead terminals 110. The first connection unit 134 is connected to the connection unit 132. The first plate unit 136 has a plate-like outer shape and is connected to the first connecting unit 134, and the first plate unit 136 is directly applied with a force according to one of the tensile strengths of one of the main springs 140. The second connection unit 137 is connected to the first board Yuan 136. The second plate unit 138 has a plate-like outer shape and is connected to the second connecting unit 137, and the second plate unit 138 is directly applied with a force according to one of the tensile strengths of one of the biasing springs 150. In this case, a support block 170 supports a second lead terminal 120. The second lead terminal 120 is connected to the other end of the second board unit 138 opposite to one end of the second board unit 138 connected to the second connection unit 137. The re-stable fuse for high current according to the present embodiment has a structure in which one of the main spring 140 and the biasing spring 150 is disposed in parallel. This structure is designed to reduce the height and size of repeatable fuses for high currents to be as slim as possible. Therefore, this structure can be applied to the field of slim devices such as lithium (Li) battery packs.

The first lead terminal 110 is disposed to contact a positive temperature coefficient thermistor 160, and in particular, the first lead terminal 110 is disposed to contact one of the first electrodes 162 of the positive temperature coefficient thermistor 160.

The second lead terminal 120 is inserted into the outer casing 100 via a second opening (not shown) formed in one of the second side surfaces of the outer casing 100 to be electrically connected to the contact operation panel 130. More specifically, the second lead terminal 120 is connected to the second board unit 138 that contacts the operation panel 130 to be electrically connected to the second board unit 138. The second lead terminal 120 is disposed to be connected to one of the positive temperature coefficient thermistors 160 opposite to one surface of the positive temperature coefficient thermistor 160 contacting the first lead terminal 110 via a second terminal connection unit 128 Surface (second electrode 164).

Although not shown in the drawings, the re-stable fuse for high current according to the present embodiment may further include one of the trigger terminals similar to the trigger terminal 180 included in the re-stable fuse according to the sixth embodiment.

A force is applied to the first plate unit 136 according to one of the elastic movements of the main spring 140, and a force is applied to the second plate unit 138 according to one of the elastic movements of the biasing spring 150. The main spring 140 is disposed between the positive temperature coefficient thermistor 160 and the first plate unit 136. At one side of the second connection unit 137 opposite to one side of the second connection unit 137 in which the main spring 140 is disposed, the biasing spring 150 is disposed between the second plate unit 138 and one of the inner walls of the outer casing 100. The connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 due to the force applied to the first board unit 136 and the second board unit 138.

In the reciprocable fuse for high current having the structure described above, a force is directly applied to the first plate unit 136 according to the elastic movement of the main spring 140, and according to the elastic movement of the biasing spring 150 A force is applied directly to the second plate unit 138. The connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 according to the elastic movement of the main spring 140 and the biasing spring 150. When the connecting unit 132 is electrically connected or disconnected from the first lead terminal 110 , the first lead terminal 110 and the second lead terminal 120 are electrically connected or disconnected from each other.

The main spring 140 is used to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 to the first lead terminal 110 and may be disposed between the PTC thermistor 160 and the first board unit 136. When the main spring 140 is compressed, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 are in contact with each other. When the main spring 140 is stretched, the first lead terminal 110 and the connection unit 132 contacting the operation panel 130 may be separated to be electrically disconnected from each other.

The biasing spring 150 is used together with the main spring 140 to electrically connect or disconnect the connecting unit 132 of the contact operating panel 130 to the first lead terminal 110. In and The side of the second connection unit 137 where the main spring 140 is disposed is opposite to the side of the second connection unit 137, and the biasing spring 150 may be disposed between the second plate unit 138 and the inner wall of the outer casing 100. At the opposite side of the second connecting unit 137, the biasing spring 150 can be disposed in a tensile state between the second plate unit 138 and the inner wall of the outer casing 100 such that the connecting unit 132 contacting the operating panel 130 can be applied The pressure is maintained in contact with the first lead terminal 110. When the main spring 140 is stretched, the biasing spring 150 may be compressed to separate the first lead terminal 110 from the connecting unit 132 contacting the operation panel 130, thereby electrically disconnecting the first lead terminal 110 and the connecting unit 132 from each other. Pick up.

In a reciprocable fuse for high current, when abnormal power (for example, current or voltage higher than a reference level) is supplied to the first lead terminal 110 or the second lead terminal 120, a high current is passed through The connection unit 132 electrically connected to the lead terminal 110, the first connection unit 134, the first board unit 136, the second connection unit 137, and the second board unit 138 are supplied to the biasing spring 150. When the high current biasing spring 150 is supplied, the temperature of the biasing spring 150 rises due to one of the resistance values thereof, thereby raising the internal temperature of the outer casing 100. Further, when the internal temperature of the outer casing 100 becomes higher than a transition temperature, the temperature of the main spring 140 formed of a shape memory alloy rises to bring the main spring 140 due to abnormal overheating of an electric heating device or an electronic instrument. Change to a tensile state. In other words, when the main spring 140 is changed to the tensile state, the first plate unit 136 contacting the operation panel 130 is pressed due to the tensile strength of the main spring 140. When the main spring 140 is in the tensile state, the connecting unit 132 contacting the operation panel 130 is moved upward by the force applied to the first plate unit 136. Next, the first lead terminal 110 and the contact operation The connecting units 132 of the board 130 are separated to be electrically disconnected from each other. Therefore, the first lead terminal 110 and the second lead terminal 120 are electrically disconnected from each other, thereby preventing current flow between them or the like.

When the abnormal power disappears, the positive temperature coefficient thermistor 160 cannot self-heat and is thus naturally cooled. Therefore, the tensile strength of the main spring 140 is released and the tensile strength of the biasing spring 150 becomes stronger than the tensile strength of the main spring 140. Therefore, a force is applied directly downward to the connection unit 132 to move the connection unit 132 toward the first lead terminal 110. Accordingly, the first lead terminal 110 is electrically connected to the connection unit 132 of the contact operation panel 130, thereby allowing the re-stable fuse for high current to return to a normal operation state.

According to the present invention, when a positive temperature coefficient thermistor self-heats to a certain critical temperature or higher, one of the positive temperature coefficient thermistors is sharply increased due to an overcurrent to continuously block current flow. The positive temperature coefficient thermistor is used to prevent continuous supply of electric power via the positive temperature coefficient thermistor. Therefore, it is possible to prevent a fire or failure occurring in the electrical/electronic product caused by one of the circuits in an electric/electronic product being supplied with an overcurrent or its overheating.

When the overcurrent disappears, the positive temperature coefficient thermistor is cooled to allow the current to flow normally through the positive temperature coefficient thermistor. When the allowable current flows normally, a time delay corresponding to one of the cooling periods of the positive temperature coefficient thermistor occurs. Therefore, since the power cut-off state is automatically canceled in a state of one of the sufficient cooling circuits or the like, it is possible to suppress the occurrence of the failure in a re-stable fuse and suppress the overheating of one of the circuits included in an electric/electronic product. . Correspondingly, the fire in the electrical/electronic product can be minimized The probability of occurrence of a disaster or failure.

Since safety components for high voltage/current in the field of electric vehicles or the like have been attracting attention, it is possible to manufacture a multi-contact structure instead of a single contact structure or a one-line contact structure instead of a one-contact structure. Safety components. Thus, a large amount of current can be supplied to the safety members during normal operation of one of the safety members. Accordingly, the safety members can be used in high power power machines, and can also be used as an effective overcurrent prevention/heating member in electric vehicles that are expected to increase substantially in the near future.

In addition, even if an overcurrent is suddenly or continuously supplied, a circuit can be continuously blocked, and a load device (for example, a motor, an important integrated circuit (IC) or the like) disposed at a rear portion can be thus to a large extent Protected from an electric shock. In addition, fires or failures occurring in an electrical/electronic product due to overheating of the ambient temperature can be prevented by efficiently disposing of ambient temperature overheating.

The one of the repeatable fuses for high current according to the present invention may further comprise a trigger terminal. When a signal voltage of about 5 volts or less is applied to the trigger terminal, a positive temperature coefficient thermistor self-heats to electrically disconnect a first lead terminal and a second lead terminal from each other. Therefore, a remote control effect can be achieved. For example, a signal voltage is applied from a master wafer to the trigger when one of the various electronic devices, the main processor or one of the microcomputers, senses the surrounding environment's overheating or one of the peripheral devices' safety hazards. The terminal is configured to electrically disconnect the first lead terminal and the second lead terminal from each other, thereby enabling the main wafer to be integrated with the safety of the control device.

It will be apparent to those skilled in the art that the spirit or scope of the invention may be Various modifications of the illustrative embodiments of the invention described above are made. Accordingly, the present invention is intended to cover all such modifications as such

100‧‧‧ Shell

104‧‧‧First opening

110‧‧‧First lead terminal

112‧‧‧First contact unit

116‧‧‧Line contact unit

120‧‧‧Second lead terminal

122‧‧‧Second contact unit

124‧‧‧Lower step

126‧‧‧First terminal connection unit

128‧‧‧Second terminal connection unit

130‧‧‧Contact operation panel

132‧‧‧ Connection unit

134‧‧‧First connection unit

136‧‧‧ first board unit

137‧‧‧Second connection unit

138‧‧‧Second board unit

140‧‧‧Main Spring

150‧‧‧bias spring

160‧‧‧Positive temperature coefficient thermistor

162‧‧‧first electrode

164‧‧‧second electrode

166‧‧‧ positive temperature coefficient components

170‧‧‧Support block

180‧‧‧Trigger terminal

1 is a schematic diagram of one of reversible fuses for high current according to a first exemplary embodiment of the present invention; FIG. 2 is a reciprocable fuse for high current as illustrated in FIG. 1 is a schematic cross-sectional view; FIG. 3 is a diagram showing one of the repeatable fuses for high current shown in FIG. 1, wherein a first lead terminal and a second lead terminal are electrically disconnected from each other FIG. 4 illustrates a positive temperature coefficient thermistor in accordance with an illustrative embodiment of the present invention.

5 is a graph showing resistance characteristics of a positive temperature coefficient thermistor according to an exemplary embodiment of the present invention; FIG. 6 is a diagram illustrating a second exemplary embodiment of the present invention. One of the high currents is a schematic diagram of one of the repeatable fuses; FIG. 7 is a schematic cross-sectional view of one of the repeatable fuses for high current shown in FIG. 6; FIG. 8 is a diagram of FIG. An illustration of a repeatable fuse for high current, wherein a first lead terminal and a second lead terminal are electrically disconnected from each other; FIG. 9 is a diagram illustrating a third exemplary embodiment of the present invention. A schematic diagram of one of the high-current repeatable fuses; 10 is a schematic cross-sectional view of one of the reflowable fuses for high currents shown in FIG. 9; FIG. 11 is a diagram showing one of high currents according to a fourth exemplary embodiment of the present invention. A schematic diagram of one of the repeating fuses; FIG. 12 is a schematic cross-sectional view of one of the reflowable fuses for high current shown in FIG. 11; FIG. 13 is a diagram showing a fifth exemplary embodiment of the present invention. FIG. 14 is a schematic cross-sectional view of one of the repeatable fuses for high currents illustrated in FIG. 13; FIG. 15 is a diagram showing one of the present inventions. A schematic diagram of one of the high-current re-stable fuses of the sixth exemplary embodiment; FIG. 16 is a diagram showing one of the high-current re-stable fuses according to a seventh exemplary embodiment of the present invention FIG. 17 is an enlarged view of a line contact unit and a contact operation panel according to an exemplary embodiment of the present invention; FIG. 18 is a diagram showing a high current according to an eighth exemplary embodiment of the present invention. a schematic diagram of a repeatable fuse; and FIG. 19 is a ninth example of the present invention A schematic diagram of one of the repeatable fuses for high currents of the embodiment.

100‧‧‧ Shell

104‧‧‧First opening

110‧‧‧First lead terminal

112‧‧‧First contact unit

120‧‧‧Second lead terminal

122‧‧‧Second contact unit

124‧‧‧Lower step

130‧‧‧Contact operation panel

132‧‧‧ Connection unit

134‧‧‧First connection unit

136‧‧‧ first board unit

140‧‧‧Main Spring

150‧‧‧bias spring

160‧‧‧Positive temperature coefficient thermistor

170‧‧‧Support block

Claims (24)

A reciprocable fuse for high current, comprising: a housing having an internal space; a first lead terminal disposed at a side surface of the housing; and a second lead terminal in the housing One of the side surfaces is disposed to be spaced apart from the first lead terminal; a contact operating plate disposed in the housing to be electrically disconnected from the housing and to the first lead terminal or the first lead terminal and the The second lead terminals are electrically disconnected or connected; a main spring and a biasing spring disposed in the housing and configured to contact the contact panel with the first lead terminal or the first An elastic member electrically connected or disconnected between the lead terminal and the second lead terminal; and a positive temperature coefficient thermistor inserted into the housing to be electrically connected to the first lead terminal and the second a lead terminal, wherein the positive temperature coefficient thermistor comprises a positive temperature coefficient element, and one of the positive temperature coefficient thermistors increases when a temperature of one of the positive temperature coefficient elements is higher than a specific critical temperature, Contact panel Operating in accordance with the tensile strength of the main spring and the biasing spring, and the contact operating plate is moved in a tensile or compressive direction along one of the main spring and the biasing spring to be coupled to the first lead terminal or the first Both the lead terminal and the second lead terminal are electrically connected or disconnected. The re-stable fuse for high current as claimed in claim 1, wherein when When the overcurrent is greater than a reference level or the internal temperature of one of the outer casings is higher than a specific critical temperature due to an external environment, the resistance of the positive temperature coefficient thermistor is increased to stretch the main spring Therefore, the contact operating panel is separated from the first lead terminal or the first lead terminal and the second lead terminal due to the tensile strength of the main spring to be separated from the first lead terminal or the first The lead terminal and the second lead terminal are electrically disconnected, thereby continuously preventing current from flowing between the first lead terminal and the second lead terminal, and when the overcurrent disappears or the internal temperature of the outer casing is low At the specific critical temperature, the positive temperature coefficient thermistor is cooled to reduce the tensile strength of the main spring, and therefore, the contact operating plate is pressed toward the tensile strength of the biasing spring. The first lead terminal or both the first lead terminal and the second lead terminal are electrically connected to the first lead terminal or both the first lead terminal and the second lead terminal, thereby allowing the repeatable The fuse returns to one The normal operating state. The re-fusible fuse for high current according to claim 1, wherein the positive temperature coefficient thermistor comprises: a first electrode electrically connected to the first lead terminal; and a second electrode electrically Connecting to the second lead terminal; and the positive temperature coefficient component disposed between the first electrode and the second electrode, wherein one of the positive temperature coefficient thermistors is at a temperature of the positive temperature coefficient component Increase above this particular critical temperature. The repeatable resistor for high current according to claim 3, wherein the positive temperature coefficient thermistor has a plate shape, and An insulator is disposed on one side surface of the positive temperature coefficient thermistor to prevent a short circuit from occurring between the first electrode and the second electrode. A re-stable fuse for high current as claimed in claim 1, wherein the positive temperature coefficient element is formed of a ceramic material based on BaTiO ₃ . The re-stable fuse for high current according to claim 1, wherein the positive temperature coefficient element is formed of a polymer material in which metal particles having conductivity are distributed in the polymer matrix. A re-stable fuse for high current according to claim 1, further comprising a housing inserted into the housing to fix a support block of the contact operation panel, wherein the support block is coupled to one end of the contact operation panel for supporting The contact panel is contacted and the support block is formed by an insulator. A repeatable fuse for high current according to claim 1, wherein the main spring is formed of a shape memory alloy, the bias spring includes a conductive spring, and an overcurrent is supplied or the outer casing is greater than a reference level When the internal temperature is higher than a specific critical temperature due to an external environment, the tensile strength of the main spring is greater than the tensile strength of the bias spring, and when the overcurrent disappears or the internal temperature of the outer casing is low At the specific critical temperature, the tensile strength of the main spring is less than the tensile strength of the biasing spring, and therefore, the contact operating plate is pressed toward the first lead due to the tensile strength of the biasing spring. a terminal or both the first lead terminal and the second lead terminal. A repeatable fuse for high current according to claim 1, wherein a first opening is formed in a first side surface of the one of the outer casings, The first lead terminal and the second lead terminal are inserted into the housing via the first opening, and the contact operating panel is configured to be electrically connected or disconnected from the first lead terminal and the second lead terminal, And the first lead terminal and the second lead terminal are electrically connected or disconnected from each other via the contact operation plate. The repeatable fuse for high current according to claim 9, wherein the plurality of contact units protruding upward are respectively disposed on a portion of the first lead terminal and the second lead terminal that are in contact with the contact operation plate, and are in contact One of the contact unit of the plurality of contact units has a plate-like shape. The reciprocal fuse for high current according to claim 9, wherein the contact operating panel comprises: a connecting unit electrically conductive and configured to contact the first lead terminal and the second lead terminal; a connecting unit connected to the connecting unit; and a first board unit having a plate shape and connected to the first connecting unit, and according to the tensile strength of the main spring and the biasing spring a force is directly applied to the first plate unit, wherein a force is applied to the first plate unit according to the elastic movement of the main spring and the biasing spring, and the force is applied according to the force applied to the first plate unit The connecting unit is electrically connected or disconnected from the first lead terminal and the second lead terminal. The re-stable fuse for high current as claimed in claim 11, wherein the main spring And the biasing spring is disposed to be stretched or compressed in a direction parallel to a moving direction of the connecting unit, the main spring being disposed between the PTC thermistor and the first plate unit, and One side of the first plate unit in which the main spring is disposed is opposite to a side of the first plate unit, and the biasing spring is disposed between the first plate unit and an inner wall of the outer casing. The repeatable fuse for high current according to claim 11, wherein the main spring and the bias spring are disposed to be stretched or compressed in a direction parallel to a moving direction of the connecting unit, the connecting unit having a board a main shape, the main spring is disposed between the PTC thermistor and the first plate unit, and the first plate unit is opposite to a side of the first plate unit in which the main spring is disposed At one side, the biasing spring is disposed between the connecting unit and an inner wall of the outer casing. The reciprocal fuse for high current according to claim 9, wherein the contact operating panel comprises: a connecting unit having conductivity and contacting the first lead terminal and the second lead terminal; a first connecting unit, Connected to the connecting unit; a first plate unit having a plate shape and connected to the first connecting unit, and applying a force directly to the first plate unit according to the tensile strength of the main spring; a second connecting unit connected to the first board unit; and a second board unit having a plate shape and connected to the second connecting unit, and according to the tensile strength of the bias spring a force is directly applied to the second plate unit, wherein a force is applied to the first plate unit according to elastic movement of one of the main springs, and a force is applied to the second plate according to elastic movement of one of the biasing springs a unit, the main spring being disposed between the PTC thermistor and the first plate unit, opposite to a side of the second connecting unit opposite to a side of the second connecting unit in which the main spring is disposed The biasing spring is disposed between the second plate unit and the inner wall of the outer casing, and the connecting unit and the first according to the forces applied to the first plate unit and the second plate unit The lead terminal and the second lead terminal are electrically connected or disconnected. A re-stable fuse for high current according to claim 9, further comprising a trigger terminal inserted into the housing via a second opening formed in one of the second side surfaces of the housing, wherein the trigger terminal Electrically connected to the positive temperature coefficient thermistor. A repeatable fuse for high current according to claim 1, wherein a first opening is formed in a first side surface of the outer casing, and a second opening is formed in a second side surface of the outer casing, The first lead terminal is inserted into the housing via the first opening, the second lead terminal is inserted into the housing via the second opening, the contact operating panel being disposed to be electrically connected to the second lead terminal And electrically connected or disconnected from the first lead terminal, and the first lead terminal and the second lead terminal are electrically connected or disconnected from each other via the contact operation plate. The re-stable fuse for high current according to claim 16, wherein one of the upwardly protruding contact units is disposed on a portion of the first lead terminal that is in contact with the contact operation panel, and the contact operation panel that contacts the contact unit One of the connecting units has a plate shape. The repeatable fuse for high current according to claim 16, wherein the plurality of contact units protruding upward are disposed on a portion of the first lead terminal that is in contact with the contact operation panel, and the one of the plurality of contact units is contacted One of the contact unit of the contact operation panel has a plate shape. A repeatable fuse for high current according to claim 16, wherein one of the line contact units having one of the bar-shaped shapes protruding upward is disposed on a portion of the first lead terminal that is in contact with the contact operation plate to increase the first A contact area between the lead terminal and the contact operation plate, and a connection unit of the contact operation plate contacting the line contact unit has a plate shape. The re-stable fuse for high current as claimed in claim 16, wherein the contact operation panel comprises: a connecting unit having electrical conductivity and contacting the first lead terminal; a first connecting unit connected to the connecting unit; and a first board unit having a plate shape and connected to the first connecting unit Applying a force directly to the first plate unit according to the tensile strength of the main spring and the biasing spring, wherein a force is applied to the first spring according to the elastic movement of the main spring and the biasing spring a board unit, and the connecting unit is electrically connected or disconnected from the first lead terminal according to the force applied to the first board unit. A repeatable fuse for high current according to claim 20, wherein the main spring and the biasing spring are disposed to be stretched or compressed in a direction parallel to a moving direction of the connecting unit, the main spring being disposed at the The biasing spring is disposed between the positive temperature coefficient thermistor and the first plate unit, and at a side of the first plate unit opposite to one side of the first plate unit in which the main spring is disposed Between the first plate unit and an inner wall of the outer casing. The re-stable fuse for high current as claimed in claim 20, wherein the main spring and the biasing spring are disposed to be stretched or compressed in a moving direction of the connecting unit, the connecting unit having a plate shape, the main a spring is disposed between the positive temperature coefficient thermistor and the first plate unit, and opposite to a side of the first connecting unit with the main spring disposed therein At one side of the first connecting unit, the biasing spring is disposed between the connecting unit and an inner wall of the outer casing. The re-stable fuse for high current according to claim 16, wherein the contact operation panel comprises: a connection unit having conductivity and contacting the first lead terminal; and a first connection unit connected to the connection unit a first plate unit having a plate-like shape and connected to the first connecting unit, and applying a force directly to the first plate unit according to the tensile strength of the main spring; a second connecting unit, Connected to the first plate unit; and a second plate unit having a plate-like shape and connected to the second connecting unit, and applying a force directly to the first according to the tensile strength of the biasing spring a two-plate unit, wherein a force is applied to the first plate unit according to elastic movement of one of the main springs, and a force is applied to the second plate unit according to one of the biasing springs, the main spring is disposed Between the positive temperature coefficient thermistor and the first plate unit, at a side of the second connecting unit opposite to one side of the second connecting unit in which the main spring is disposed, the biasing spring Placed on the second board And one between the inner housing and the unit is connected to the connecting or disconnecting the first lead terminal electrically to such a force is applied according to the first panel unit and the second plate of the unit. The re-stable fuse for high current of claim 16, further comprising a trigger terminal inserted into the housing via one of the third openings formed in one of the third side surfaces of the housing, wherein the trigger terminal Electrically connected to the positive temperature coefficient thermistor.