CN101261913B - Miniature breaker - Google Patents
Miniature breaker Download PDFInfo
- Publication number
- CN101261913B CN101261913B CN2007100796726A CN200710079672A CN101261913B CN 101261913 B CN101261913 B CN 101261913B CN 2007100796726 A CN2007100796726 A CN 2007100796726A CN 200710079672 A CN200710079672 A CN 200710079672A CN 101261913 B CN101261913 B CN 101261913B
- Authority
- CN
- China
- Prior art keywords
- contact
- button
- elastic
- elastic sheet
- circuit breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000926 separation method Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Fuses (AREA)
Abstract
The invention discloses a miniature circuit breaker, which is characterized in that: two terminals of a circuit are connected by a contacting spring plate, and leads the two terminals to be electrically connected, thus leading the circuit to be communicated; wherein, one end of the contacting spring plate, a fixed one, is fixedly connected with one terminal, and the other end of the contacting spring plate is a free one; the contacting spring plate close to the fixed end is bent and extends along a direction away from the free end, to form an elastic arc section; the elastic arc section takes the fixed end as a pivot and is provided with elastic-restoring forces. Through the setup of the elastic arc section, the contacting spring plate can be provided with elastic forces, the spatial lengths of the contacting spring plate can be effectively reduced, and the sizes of the contacting spring plate can be decreased, so as to realize the purpose of the miniaturization of the circuit breakers.
Description
Technical Field
The invention relates to electrical equipment, in particular to a micro-miniature breaker.
Background
Generally, in a whole circuit loop and an individual switch circuit loop for supplying power, electric elements such as a fuse, a breaker, and a thermal relay are used to protect the circuits, thereby preventing the occurrence of an electric wire ignition phenomenon due to current overload and overheating and ensuring the safety of power consumption.
In some single electronic and electrical products, such as: in products such as high-price electronic products, data processing information equipment or electric heating appliances with high power consumption, a circuit protection structure of a temperature sensing breaker is usually arranged inside a power cord or a machine body to protect the single electronic and electric products, so that the single electronic and electric products can sense and break the power in real time when the current is overloaded and the circuit is overheated, and the products can be burnt. Meanwhile, the arrangement of the circuit protection structure of the temperature sensing circuit breaker can avoid the condition that the current overload and overheating conditions of individual circuit loops or whole circuit loops cause the failure of other electric equipment in the individual circuit loops or the whole circuit loops due to the problems of single electronic and electric products.
The conventional temperature-sensing circuit breaker for a single electronic product is usually connected to two terminals by a contact spring, so as to connect a circuit loop, although the characteristic that the contact spring deforms after being heated and bends and bounces in a reverse direction to break the circuit loop can be utilized, so that the contact spring automatically trips and is disconnected when the current is overloaded and overheated; however, the conventional temperature sensing power-off protector has the following disadvantages
1. The contact spring sheet of the existing temperature sensing breaker is designed to be bent, and has the characteristics of thermal deformation, reverse bending and bouncing; when the contact elastic sheet is punched or assembled into a curved arc shape, the thickness, the bending degree and the structural characteristics of each contact elastic sheet cannot be completely the same during manufacturing, so that the reaction temperature value of the contact elastic sheet which is deformed after being heated and reversely bent and bounced is difficult to be effectively controlled, the value error of the set induction temperature is large, and the quality control is difficult.
2. The curved contact spring of the existing temperature sensing circuit breaker has low sensitivity of deformation and reverse bending bounce after being heated, and cannot timely protect the electronic product when being overloaded and overheated.
3. Because the space length and the size of the contact spring piece can not be reduced, the size and the total volume of the conventional temperature sensing breaker are relatively large, and the size of the power-off protector can not be reduced. The large-size and large-volume power-off protector can affect the aesthetic property of the product when arranged on a power line, and the size of the electric product can be increased when arranged inside an electric appliance.
4. The existing temperature sensing circuit breaker can not reduce the manufacturing materials, and the manufacturing cost of the product can not be reduced.
Disclosure of Invention
The invention aims to solve the defects of the curved contact spring piece of the existing temperature-sensing circuit breaker, such as: the reaction temperature value of the contact elastic sheet which is deformed by heating and reversely bent and bounced cannot be effectively controlled; the error of the set induction temperature value is large, and the production quality control is not easy; the sensitivity is not high, and the electronic product cannot be tripped or powered off in time when the electronic product is overloaded and overheated so as to protect the electronic product; the size and the total volume of the conventional temperature sensing circuit breaker are relatively large due to the fact that the space length and the size of the contact spring piece cannot be reduced; the material or the manufacturing cost of the product cannot be reduced.
The invention provides a microminiature breaker, which comprises a box body, a button and a contact elastic sheet; wherein,
the box body is hollow, at least two contact terminals are arranged in the box body, the first contact terminal is fixedly provided with one end of a contact elastic sheet, and the second contact terminal is combined with a second contact point;
the button is a cylinder, is movably embedded in the box body, can move relative to the box body and can be abutted against one surface of the contact elastic sheet;
the contact elastic sheet is a bent sheet body, one end of the contact elastic sheet is a fixed end, and the fixed end is arranged on the first contact terminal; the other end of the contact spring piece is a free end, and the free end is provided with a first contact point;
the contact elastic sheet is provided with an elastic curved arc section near the fixed end, and the elastic curved arc section bends and extends the contact elastic sheet to the direction far away from the free end and then bends to the direction of the free end to form a semicircular curved arc opening shape;
when the contact elastic sheet is heated, the elastic curved section makes the free end of the contact elastic sheet stretch outwards to bounce so as to make the first contact and the second contact in an absolute separation state.
The invention relates to a micro breaker, which mainly utilizes an elastic curved arc section formed by bending and extending a contact elastic sheet, so that the contact elastic sheet has elastic force through the arrangement of the elastic curved arc section, and the space length and the size of the short contact elastic sheet are reduced, thereby achieving the purpose of reducing the volume of the breaker.
Secondly, the contact spring piece is provided with an elastic curved arc section, the curved arc center of the elastic curved arc section is taken as an axis, the geometric relation of angular displacement is matched, when the elastic curved arc section is subjected to thermal deformation and opens an arc angle to displace a small distance, the free end and the first contact of the contact spring piece are relatively displaced for a large distance, the first contact and the second contact are ensured to be in an absolute separation state through the relatively amplified displacement distance, no electric field is connected, a circuit loop is in an absolute power-off state, and the power utilization safety is ensured.
And the contact elastic sheet arranged in the breaker group has elastic force by utilizing the arrangement of the elastic arc-shaped section, and does not realize the functions of deformation after being heated and reverse bending and bouncing by stamping or assembling into an arc shape, so that the reaction temperature value of the deformation and bouncing of the contact elastic sheet after being heated can be effectively controlled, the set induction temperature is accurate, and the quality is easy to control.
Finally, the contact elastic sheet has the outward-extending elastic restoring force by utilizing the arrangement of the elastic curved arc section, the whole structure is simple, the manufacture is easy, the requirement of volume miniaturization can be met, the number of materials required by the breaker structure is reduced, and the manufacture cost can be effectively reduced.
FIG. 1 is an exploded perspective view of an embodiment of the miniature circuit breaker of the present invention;
drawings
FIG. 2 is a combined cross-sectional view of an embodiment of the miniature circuit breaker according to the present invention, showing the circuit loop in a power-off state;
FIG. 3 is another sectional view of the miniature circuit breaker according to the present invention, showing the conducting state of the circuit loop;
fig. 4 is a partially enlarged view of fig. 3, which shows a state that the contact spring is thermally stretched, deformed and tripped when the current is overloaded or the circuit is overheated.
Wherein the reference numerals are as follows:
1 case 10 groove
101 upper indentation and 102 lower indentation
11 first contact terminal 111 projection
12 second contact terminal 121 second contact
13 first slot 14 second slot
2 expanded end of button 21
22 concave ring neck 23 elastic element
3 contact spring 30 through hole
31 first contact 32 with a flexible curved segment
33 convex piece 34 arc spring piece
341 buttonhole 342 slot
35 adjusting screw 351 ring concave neck
In order to make the invention more fully apparent, its objects, features and advantages, the invention will now be described in detail by way of the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Detailed Description
Fig. 1 is an exploded perspective view of a micro-breaker according to an embodiment of the present invention, and fig. 2 and 3 are two combined cross-sectional views of the micro-breaker according to an embodiment of the present invention, which includes a case 1, a button 2, and a contact spring 3; wherein,
the box body 1 is hollow, the box body 1 is provided with a groove 10, and the upper side and the lower side of the groove 10 are respectively provided with an upper concave notch 101 and a lower concave notch 102; at least two contact terminals, in this embodiment two contact terminals, i.e. a first contact terminal 11 and a second contact terminal 12, are disposed on the bottom surface of the case 1 and inserted into the first slot 13 and the second slot 14 below the case 1, respectively, the first contact terminal 11 is bent and fixed at one end of the contact spring 3, a protrusion 111 is disposed below the first contact terminal 11, and a second contact 121 is combined above the second contact terminal 12.
The button 2 is a cylinder, and the bottom end part of the button 2 is a cap-shaped disc-shaped expanded end 21; the button is provided with a concave annular neck part 22, and the diameter of the concave annular neck part 22 is smaller than that of the columnar body of the button 2; an elastic element 23 is sleeved on the concave annular neck portion 22 of the button 2, in this embodiment, the elastic element 23 is a coil spring; when assembling, the button 2 is movably embedded in the upper concave gap 101 of the groove 10 of the box body 1, the concave ring neck 22 of the button 2 is movably embedded in the lower concave gap 102, the elastic element 23 is located between the lower concave gap 102 and the expanded end 21 and has an outward extending elastic force, the button 2 can move up and down in the upper concave gap 101 and the lower concave gap 102 of the groove 10 of the box body 1, and the button 2 can abut against the upper side surface of the contact spring piece 3.
Referring to fig. 2 and 3, in the present embodiment, the fixed end of the contact spring 3 is provided with a through hole 30 which is sleeved on the protrusion 111 of the first contact terminal 11 and is jointly inserted into the first slot 13 below the box body 1 for fixation; the other end of the contact spring 3 is a free end, and a first contact 31 is arranged on the free end. The contact elastic sheet 3 forms an elastic curved section 32 near the fixed end, the elastic curved section 32 bends and extends the contact elastic sheet 3 to the direction far away from the free end and then bends to the direction of the free end to form a semicircular curved opening shape, the whole section of the elastic curved section 32 is a heat deformation area and has elastic restoring force, and the contact elastic sheet 3 has elastic force and can stretch outwards to bounce after being heated through the arrangement of the elastic curved section 32; meanwhile, the bending center of the elastic bending section 32 is used as an axis, and the geometric relationship of angular displacement is matched, when the elastic bending section 32 is deformed by heating, opens an arc angle and displaces a small distance, the first contact 31 of the free end of the contact elastic sheet 3 is relatively displaced a large distance, and certainly, when the elastic bending section 32 is closed by an arc angle and displaces a small distance, the first contact 31 of the free end of the contact elastic sheet 3 is relatively displaced a large distance. The contact spring 3 may be a composite metal sheet.
The fixed end of the contact spring 3 can also be riveted directly to the first contact terminal 11 by a rivet.
In addition, referring to fig. 1, fig. 2 and fig. 3, in the embodiment of the present invention, a protruding piece 33 is disposed at a free end of the contact elastic piece 3, the protruding piece 33 is movably fastened to a fastening hole 341 of an arc elastic piece 34, the other end of the arc elastic piece 34 is movably embedded in a concave neck 351 of an adjusting screw 35 by a groove 342, the adjusting screw 35 is disposed in the box body 1, the concave neck 351 of the adjusting screw 35 is exposed inside the box body 1, the arc elastic piece 34 has a proper elastic force by adjusting the displacement of the adjusting screw 35, and when the contact elastic piece 3 bounces to the upper side, the contact elastic piece can be ensured to be stretched and positioned in a bouncing off state.
The present invention is in the general power-off and power-on states, as shown in fig. 2 and 3; when the button 2 is pressed downward, the expanded end 21 of the lower end of the button 2 presses the contact spring 3 downward, so that the first contact 31 of the contact spring 3 is downward contacted with the second contact 121 of the second contact terminal 12, and a circuit loop communication state is formed, as shown in fig. 3.
When the current is overloaded or the circuit loop is overheated, the contact spring 3 is heated, the elastic curved section 32 is heated to deform and opens an arc angle to displace for a distance, referring to fig. 4, the free end of the contact spring 3 extends upwards, the first contact 31 displaces for a large distance relatively and bounces upwards, the displacement distance of the first contact 31 can ensure that the first contact 31 and the second contact 121 are in an absolute separation state, and then no electric field is connected, the power-off state of the circuit loop is ensured, as shown in fig. 2, at this time, the first contact 31 pushes the expanded end 21 of the button 2, so that the button 2 faces upwards.
The present invention has been described in detail with reference to the specific embodiments, but the above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. Therefore, all changes and modifications that come within the spirit of the invention are desired to be protected.
Claims (7)
1. A miniature circuit breaker comprises a box body, a button and a contact spring sheet; wherein,
the box body is hollow, at least two contact terminals are arranged in the box body, the first contact terminal is fixedly arranged at one end of the contact elastic sheet, and the second contact terminal is combined with a second contact point;
the button is a cylinder and is movably embedded in the box body, the button can move relative to the box body, and the button can be abutted against one surface of the contact elastic sheet;
the contact elastic sheet is a bent sheet body, one end of the contact elastic sheet is a fixed end, and the fixed end is arranged on the first contact terminal; the other end of the contact spring piece is a free end, and the free end is provided with a first contact point;
the contact elastic sheet is characterized in that an elastic curved arc section is formed near the fixed end, and bends and extends the contact elastic sheet towards the direction far away from the free end and then turns to bend towards the direction of the free end to form a semicircular curved arc opening shape;
when the contact elastic sheet is heated, the elastic curved section makes the free end of the contact elastic sheet stretch outwards to bounce so as to make the first contact and the second contact in an absolute separation state.
2. The miniature circuit breaker of claim 1, wherein said case has a recess, the upper and lower sides of said recess having upper and lower concave notches, respectively;
the bottom end part of the button column body is a hat-shaped expanded end; the button is provided with a concave ring neck part, and the diameter of the concave ring neck part is smaller than that of the button cylindrical body; an elastic element is sleeved on the concave ring neck part of the button;
the button is movably embedded in the upper concave gap of the groove of the box body, the concave ring neck of the button is movably embedded in the lower concave gap, and the elastic element is positioned between the lower concave gap and the expanded end and has elastic force stretching outwards.
3. The miniature circuit breaker of claim 2, wherein said resilient element is a coil spring.
4. The miniature circuit breaker of claim 1, wherein said first and second contact terminals are inserted into first and second slots, respectively, formed in a lower portion of said case.
5. The miniature circuit breaker of claim 4, wherein said contact spring has a fixed end and a first contact terminal inserted into a first slot under said case body for fixing.
6. The miniature circuit breaker of claim 1, wherein a fixed end of said contact spring is riveted directly to said first contact terminal.
7. The miniature circuit breaker of claim 1, wherein said contact spring is a composite metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100796726A CN101261913B (en) | 2007-03-05 | 2007-03-05 | Miniature breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100796726A CN101261913B (en) | 2007-03-05 | 2007-03-05 | Miniature breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101261913A CN101261913A (en) | 2008-09-10 |
| CN101261913B true CN101261913B (en) | 2011-09-28 |
Family
ID=39962282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100796726A Expired - Fee Related CN101261913B (en) | 2007-03-05 | 2007-03-05 | Miniature breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101261913B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229236A (en) * | 2016-08-22 | 2016-12-14 | 马忠良 | Hot release unit and surge suppressor |
| CN106768544B (en) * | 2016-11-25 | 2019-03-15 | 歌尔股份有限公司 | The acquisition methods and elasticity testing device of elastic slice elastic force |
| CN109119272A (en) * | 2018-09-25 | 2019-01-01 | 深圳马太亚科技有限公司 | Mute microswitch and mouse |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339808A (en) * | 2000-08-18 | 2002-03-13 | 德克萨斯仪器股份有限公司 | Creeping type small thermostat switch and thermostat member used thereof |
| CN1773644A (en) * | 2004-11-11 | 2006-05-17 | 游聪谋 | Micro-elastic switch structure |
-
2007
- 2007-03-05 CN CN2007100796726A patent/CN101261913B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339808A (en) * | 2000-08-18 | 2002-03-13 | 德克萨斯仪器股份有限公司 | Creeping type small thermostat switch and thermostat member used thereof |
| CN1773644A (en) * | 2004-11-11 | 2006-05-17 | 游聪谋 | Micro-elastic switch structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101261913A (en) | 2008-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7808361B1 (en) | Dual protection device for circuit | |
| CN101261913B (en) | Miniature breaker | |
| US7626482B2 (en) | Safety switch | |
| US7737816B1 (en) | Dual protection device for circuit | |
| CN101685722A (en) | Double temperature-sensing power-off circuit protection structure | |
| CN101728120B (en) | Dual temperature sensing cutoff circuit protective device | |
| US8154375B2 (en) | Overcurrent protection device having trip free mechanism | |
| US7355139B1 (en) | Miniature circuit breaker | |
| CN100351976C (en) | Protector of inductive circuit with dual-temperature | |
| CN209766325U (en) | Support piece structure of conductive elastic sheet | |
| CN101165836B (en) | Temperature fuse connection structure | |
| US10777995B1 (en) | Safety device for switch | |
| US6480090B1 (en) | Universal device for safety switches | |
| CN101728121B (en) | Dual temperature sensing cutoff circuit protective device | |
| CN218351330U (en) | Overload protection key switch and electrical appliance | |
| CN217405330U (en) | Open-type protector | |
| JP3731380B2 (en) | Thermal protector and battery pack using this thermal protector | |
| CN100414660C (en) | Circuit protector with dual temperature power-off induction | |
| US5633618A (en) | Fuseless plug with safety circuit breaker | |
| TWI374469B (en) | ||
| KR100784139B1 (en) | Protector of Over Load And Plug And Multi-tab Using The Same | |
| CN205542657U (en) | Thermal protector | |
| CN110867341A (en) | Contact bimetallic strip temperature controller | |
| CN221041004U (en) | Current sensitive type protector | |
| TWI674610B (en) | Push button switch and conductor sheet thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20140305 |