KR20130111778A - Vibration module for portable terminal - Google Patents

Abstract

PURPOSE: A vibration module of a portable terminal is provided to symmetrically dispose a magnetic moving body and a solenoid in a housing, thereby implementing reciprocating linear driving. CONSTITUTION: Two magnetic moving bodies (120) are installed to move in a first direction. Two solenoids (130) are disposed between the magnetic moving bodies. The magnetic moving bodies and the solenoids are symmetrically disposed around the first direction. A housing includes a couple of elastic bodies (140). The elastic bodies are installed in the housing to face each other in the first direction.

Description

Vibration Module for Portable Terminals {VIBRATION MODULE FOR PORTABLE TERMINAL}

The present invention relates to a portable terminal, and more particularly, to a vibration module of a portable terminal capable of providing a haptic feedback function.

The haptic feedback is a meaning including a force feedback function for remote control of a robot arm, and refers to a means of expressing information based on a user's tactile and skin contact. Recently, efforts have been made to utilize not only a simple vibration function for an incoming call notification in a portable terminal such as a cellular phone but also a function of notifying that a signal value of a key selected by a user is normally input when a touch screen is operated.

In general, the portable terminal provides a vibration mode as one of methods for notifying when a text is received or a call request (incoming call). For operation in the vibration mode, the portable terminal includes a vibration motor.

In consideration of the portability of the portable terminal, coin type and bar type (coin type) and bar type (cylinder or bar type) motors are used. The coin type or bar type motors merely provide a call notification function. have.

On the other hand, in recent years, when using the Internet, a touch screen phone that can provide a full-browsing (full-browsing) screen has emerged, input devices such as a keypad is also implemented as a virtual keypad on the touch screen, touch screen The keypad detects a point where the user touches and inputs a signal value assigned to the point. In general, a button-type keypad provides a user with a click feeling using a dome switch, and the like, so that the keypad can be perceived as a tactile sense. Therefore, a user who is familiar with the keypad arrangement of the portable terminal may know that a number or a letter that he or she wishes to input is input by operating a key without checking through the display device. On the other hand, when operating the keypad implemented in the touch screen does not provide a click feeling like the dome switch, the user must check the value input through the display device directly.

Therefore, by providing a haptic feedback function to a portable terminal equipped with a touch screen type input device, efforts to solve the inconvenience of having to check a value input through a display device one by one continue. The haptic feedback function of such a portable terminal is implemented by operating a vibration motor when operating a touch screen.

As a technology related to a haptic feedback device, Korean Patent Laid-Open Publication No. 10-2011-0075714 (published: 2011.07.06, title of the invention: a haptic feedback device and a control method of the haptic feedback device), or the Republic of Korea Patent No. 10 -1046017 (registered date: June 27, 2011, title of the invention: haptic feedback actuator, haptic feedback device and electronic device) and the like.

As the actuator mounted on the haptic feedback device, a coin type or a bar type, which is a general vibration motor, is used, but a linear vibration motor with improved response characteristics has been recently used. The characteristic of the linear vibration motor is a forced harmonic vibration caused by mass and spring. The maximum vibration force is large, but has only one resonance frequency, and thus the vibration force is suddenly reduced even by a few hz difference from the resonance frequency. In addition, the response characteristics have been improved compared to the existing DC motor, but in order to provide a realistic button click feeling and various haptic patterns to the user, a response characteristic of 10 ms or less is required. In the case of a linear vibration motor, the response characteristic is about 25 ms on average. However, there was a limit in implementing button click feeling.

Accordingly, the present invention provides a vibration module capable of giving a button feeling by vibrations according to the impact during haptic feedback, as well as preventing the bias toward one of the ends of the moving section of the magnetic moving body, thereby enabling stable driving. By providing a module, to provide a vibration module of a portable terminal to enable a stable linear reciprocating motion.

In addition, to provide a vibration module of a portable terminal having high reliability by applying a spring with less distortion during the straight reciprocating motion.

In addition, to provide a vibration module of the portable terminal to maximize the magnetic attraction / repulsive force between the permanent magnet and the solenoid to give a strong impact.

In addition, by increasing the vibration characteristics of the vibration module, to provide a vacuum module of the portable terminal that the user can receive a realistic button click feeling and various haptic feedback when the user touches the haptic device.

In order to solve the above technical problem, the vibration module of the portable terminal according to an aspect of the present invention, the vibration module of the portable terminal, the housing; A pair of magnetic moving parts installed in the housing to be movable in a first direction; And a pair of solenoids disposed between the magnetic moving bodies, wherein the magnetic moving bodies and the solenoids are symmetrically disposed about the first direction.

Preferably, the housing further includes a pair of elastic bodies, wherein the elastic bodies are installed in the housing to face each other in the first direction, and support the magnetic moving body to flow in the first direction.

More preferably, the magnetic moving body, the weight member disposed in the first direction; A first magnetic body part disposed at one end of the weight member and disposed along a second vertical direction of the first direction; And a second magnetic body part facing the first magnetic body part and disposed at the other end of the weight member and disposed along the second direction.

More preferably, the magnetic moving body has an 'H' shape.

More preferably, the solenoid is disposed between the first magnetic body portion and the second magnetic body portion.

More preferably, the first magnetic body portion, the first magnetic body disposed on one side of the weight member; And a second magnetic body positioned adjacent to the first magnetic body along the second direction and disposed on the other side of the weight member.

More preferably, the second magnetic body portion, is disposed on one side of the weight member, the third magnetic body facing the first magnetic body in the first direction; And a fourth magnetic body disposed adjacent to the third magnetic body along the second direction to face the second magnetic body in the first direction and disposed on the other side of the weight member.

More preferably, the solenoid may include a first solenoid disposed between the first magnetic body and the third magnetic body toward one side of the weight member; And a second solenoid disposed between the second magnetic body and the fourth magnetic body toward the other side of the weight member.

More preferably, the magnetic moving body includes: a first magnetic path connected to the first magnetic body, the first solenoid, and the third magnetic body; And a second magnetic path connected to the second magnetic body, the second solenoid, and the fourth magnetic body, wherein the first magnetic path and the second magnetic path are symmetrical.

More preferably, the first solenoid may include a first core part disposed in the first direction; And a first coil part wound around an outer circumference of the first core part, wherein the second solenoid includes: a second core part disposed in the first direction; And a second coil part wound around an outer circumference of the second core part.

More preferably, iron pieces are further provided at both ends of the first and second solenoids.

More preferably, cover portions for seating the first and second magnetic bodies are provided at both ends of the weight member.

More preferably, the cover portion comprises a SUS material.

More preferably, the weight member comprises a tungsten material.

More preferably, openings facing each other are formed on both sides of the housing, and each of the openings is equipped with the elastic body.

More preferably, the elastic body comprises a multi-stage leaf spring, the multi-stage leaf spring, the first support portion mounted to the opening and the second support portion supported on the central portion of the weight member; And an elastic plate connecting between the first and second supports and providing elasticity.

More preferably, the housing further comprises at least one pair of dampers for limiting the movement interval between the magnetic movable body and the solenoid.

In addition, the present invention provides a vibration module of a portable terminal, comprising: a first magnetic path including a pair of first magnetic force generating means and a first electromagnetic force generating means disposed between the first magnetic force generating means; And a second magnetic path comprising a pair of second magnetic force generating means and a second electromagnetic force generating means disposed between the second magnetic force generating means, wherein the first magnetic path and the second magnetic path are symmetric with each other. And linearly reciprocating in the first direction.

Preferably, a weight member provided in the first direction is further included between the first magnetic path and the second magnetic path.

More preferably, the first magnetic force generating means is symmetrically provided at both ends of the weight member, and the second magnetic force generating means is provided symmetrically at both ends of the weight member.

More preferably, as the voltage is applied to the first and second electromagnetic force generating means, the first and second magnetic force generating means linearly reciprocate away from or close to the first and second electromagnetic force generating means.

More preferably, a cover portion of SUS material is further included to cover the first magnetic force generating means and the second magnetic force generating means.

The vibration module of the portable terminal configured as described above has the effect of allowing the magnetic body and the solenoid to be symmetrically disposed in the housing to enable stable linear reciprocation of the vibration module.

As a result, the user may provide a feeling similar to a click through the acceleration generated at the moment of stopping, when vibrating according to an input signal applied to the solenoid or when the reciprocating linear motion is performed at both ends of the moving section of the magnetic moving object. Even when vibrating, a sufficient vibration force may be generated through acceleration at the moment when the moving direction of the magnetic moving object is switched at the end of the moving section, thereby providing a warning function such as an incoming call notification.

 In addition, by arranging the elastic bodies having the shape of the leaf spring to cross each other on both sides of the housing, to minimize the distortion of the elastic body when driving the vibration module, thereby improving the reliability of the vibration module as well as the elastic body.

In addition, by providing a cover material of the sustain material in the permanent magnet, there is an effect that can double the impact vibration of the vibration module.

In addition, there is an effect that the response characteristics of the vibration module is increased, there is an effect that can generate a variety of haptic effects combining impact and vibration.

In addition, if the amplitude of the magnetic moving object is limited through the damper, the magnetic moving body may hit the damper at the point of time when the magnetic moving body reaches a linearly reciprocating movement section, thereby causing vibration to implement a click feeling or a haptic feedback function. It can be easily generated.

1 is a view schematically illustrating a principle of the vibration module of the portable terminal operating.
2 is a schematic diagram illustrating an operation concept of a vibration module of a portable terminal of the present invention.
3 is a schematic diagram illustrating an operating mechanism of a vibration module of a portable terminal according to another embodiment of the present invention.
4 is an exploded perspective view schematically illustrating a vibration module of a portable terminal according to another embodiment of the present invention.
5 is an assembled perspective view illustrating the vibration module illustrated in FIG. 4.
6 is a perspective view schematically showing only a part of the configuration of the vibration module shown in FIG.
FIG. 7 is a diagram illustrating magnetic attraction between moving magnetic bodies, the combined force of the magnetic attraction force and the restoring force of the spring and the total magnetic force distribution between the solenoid and the moving magnetic body when the cover of the magnetic moving object is iron in the vibration module shown in FIG. 5.
FIG. 8 is a diagram illustrating magnetic attraction between moving magnetic bodies, the sum of magnetic attraction forces and restoring forces of springs, and the total magnetic force distribution between solenoids and moving magnetic bodies when the cover of the magnetic moving body is made of SUS in the vibration module illustrated in FIG. 5; to be.
9 is a perspective view illustrating an elastic body in the vibration module illustrated in FIG. 5.
FIG. 10 is a plan view of the elastic body in FIG. 5. FIG.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a vibration module of a portable terminal according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, in the embodiment of the present invention, ordinal numbers such as the first and the second, etc. are used, but only for distinguishing the objects of the same name from each other, the order may be arbitrarily determined, and the preceding order The explanations may apply mutatis mutandis.

1 is a view for explaining the principle of operating the vibration module of the portable terminal, with reference to Figure 1 looks at the principle of operating the vibration module of the portable terminal according to the present invention. The vibration module 100 of the portable terminal of the present invention uses a propensity to move to either of both ends of a section reciprocating as the vibrator is unstable at a neutral position.

That is, as shown in (b), the vibration module of the portable terminal has a tendency to move to either one of both ends of the section in which the vibrator is in an unstable state and reciprocates in the neutral position. Therefore, as shown in (a) and (f), the vibrator moves to either end of the reciprocating section as the speed is gradually increased. Therefore, the vibration force according to the acceleration at the time of switching the direction of movement at the end of the reciprocating section is sufficient to implement a warning function such as an incoming call notification. Furthermore, in actual production, since the vibrator is installed in a limited space, it is possible to generate a greater impact force if the vibrator hits the wall at the end of the reciprocating section. The vibration module may be implemented by magnetic force generating means and electromagnetic force generating means. That is, the electromagnetic force generated according to the signal input to the electromagnetic force generating means and the magnetic force of the magnetic force generating means may interact to linearly reciprocate the magnetic force generating means.

An embodiment of a vibration module of a mobile terminal having this principle will be briefly described.

2 is an assembled perspective view illustrating a vibration module of a portable terminal. Referring to FIG. 2, in the vibration module 10 of a conventional portable terminal, a solenoid 12 is positioned on one side of the housing 11, and the mass mover 13 reciprocates in a linear direction adjacent to the solenoid 12. ) Is formed. In FIG. 2A, the magnetic field generated by the permanent magnet 13a on the right side passes through the right solenoid 12a to the left solenoid 12b and passes through the left permanent magnet 13b to the right permanent magnet. Return to (13a). Even if the mass transfer body 13 including the permanent magnets 13a and 13b is positioned at the center of the housing 11, specifically, at the center of the solenoid 12, as shown in FIG. As shown in (b) and (c) of FIG. 2, the mass carrier 13 moves to the left or the right. As the mass mover 13 moves to the left or the right, impact vibrations are generated by hitting the dampers 17 and the like protruding from both ends of the solenoid 12. The solenoid 12 is attached to the housing 11, and the iron piece 12c is attached to the both ends. Looking at the mass transfer member 13, the left and right permanent magnets (13b, 13a) are provided, and between the left and right permanent magnets (13b, 13a) is provided with a weight (13c) such as tungsten. An elastic body (not shown) is provided between both sides of the mass mover 13, specifically, both ends of the permanent magnets 13a and 13b and the housing 11. The mass mover 13 is vibrated in the housing 11 while being supported by an elastic body according to a signal input to the solenoid 12.

When the mass carrier 13 is located at the center portion (= displacement is 0), the magnetic force is symmetrically zero, but the magnetic force increases as the mass carrier 13 is moved to either the left or the right side. In the left and right linear reciprocating motion of the mass mover 13, a restoring force is generated by the elastic body between the housing 11 and the mass mover 13. In the case of such a restoring force, unlike the magnetic force, the restoring force increases in order to return to the center as the mass carrier 13 moves away from the center. Therefore, in order for the mass carrier 13 to move left and right to generate an impact, the magnetic force must be greater than the restoring force as the mass carrier 13 moves away from the center to both ends of the solenoid 12. That is, the mass moving body 13 is far from the center, the permanent magnet (13a, 13b) and the iron core or sole plate (15) of the solenoid 12 should have a minimum clearance. When the current direction of the solenoid 12 is periodically changed, the weight 13c to which the permanent magnets 13a and 13b are attached undergoes a linear reciprocating motion. Since the vibration module 10 generates vibration by collision, the response time is short, such as 10 ms, and the vibration force generated by the collision is greater than that of the existing motor.

3 is a view for explaining the operating mechanism of the vibration module of the portable terminal according to another embodiment of the present invention.

Referring to FIG. 3, the vibration module 100 is symmetrically spaced apart from both sides of each electromagnetic force generating means around a pair of electromagnetic force generating means 130 such as the solenoid 130 and the electromagnetic force generating means 130. It includes a pair of magnetic force generating means 120, such as a permanent magnet (120, the same as the magnetic body portion to be described later) provided.

That is, the first electromagnetic force generating means 131 is located on one side and the second electromagnetic force generating means 132 is disposed on the other side of the first direction X which is linearly reciprocated. The pair of first magnetic force generating means 121a and 122a are disposed adjacent to both ends of the first electromagnetic force generating means 131 along the first direction (X). The pair of second magnetic force generating means 121b and 122b are disposed adjacent to both ends of the second electromagnetic force generating means 132 along the first direction (X). Accordingly, the first electromagnetic force generating means 131 and the pair of first magnetic force generating means 121a and 122a are arranged to form the first magnetic path P1 along the first direction X. FIG. In addition, the second electromagnetic force generating means 132 along the first direction X to have the first magnetic path P2 symmetrically disposed about the first magnetic path P1 and the first direction X. And a pair of second magnetic force generating means 121b and 122b are disposed along the first direction X. FIG.

When a current is applied to the first and second electromagnetic force generating means 131 and 132, the attraction force between the first and second electromagnetic force generating means 131 and 132 and the first and second magnetic force generating means 121a, 122a, 121b, and 122b Or repulsive action. As a result, the pair of first and second magnetic force generating means 121a, 122a, 121b, and 122b linearly reciprocate between both side surfaces of the electromagnetic force generating means 131,132. That is, the first magnetic path P1 and the first magnetic path P2 are symmetrically generated with respect to the first direction X. FIG.

Looking briefly at the configuration for this, one side around the first direction (X), the first solenoid 131 and the first solenoid 131 in both sides of the first solenoid (131) along the first direction (X) 122a), the second and fourth magnetic bodies 121b and 122b are disposed on both sides of the second solenoid 132 and the second solenoid 132 along the first direction X on the other side, and the electromagnetic force generating means 131 132 and the magnetic force generating means 121a, 122a, 121b, and 122b are symmetrically arranged. Thus, the first magnetic path (P1), the second magnetic body (121b), the second solenoid (1) generated along the first magnetic body (121a), the first solenoid 131, the third magnetic body (122a) 132 and the first magnetic path P2 generated along the fourth magnetic body 122b are symmetrically formed. When a current is applied to the electromagnetic force generating means 131, 132 so that the first and second magnetic paths P1 and P2 symmetrically formed in the same direction are applied to the first and second electromagnetic force generating means 131, 132. The direction of the electromagnetic force generated in the first and second magnetic paths P1 and P2 can be changed by controlling the input signal, which in turn causes the magnetic force generating means 121a, 122a, 121b, 122b to linearly reciprocate. .

Thus, the electromagnetic force generating means 131, 132 and the magnetic force generating means 121a, 122a, 121b, 122b are symmetrically disposed on both sides with respect to the first direction X to form the same magnetic path, thereby causing a magnetic force. When the generating means 121a, 122a, 121b, and 122b reciprocate linear movement, the movement is prevented in addition to the linear reciprocating movement, thereby preventing the oscillation, thereby enabling stable linear reciprocating motion.

4 is an exploded perspective view schematically illustrating a vibration module of a portable terminal according to an exemplary embodiment of the present invention, and FIG. 5 is an assembled perspective view illustrating the vibration module illustrated in FIG. 4. Looking at a specific embodiment of the vibration module 100 of the present invention with reference to Figures 4 and 5, the vibration module 100 of the portable terminal is a housing 110, a pair of magnetic moving body 120, a pair of And a solenoid 130 and an elastic body 140.

The magnetic movable body 120 and the solenoid 130 are symmetrically disposed in the first direction X inside the housing 110. Further, it is also arranged symmetrically in a second vertical direction Y in the first direction X. That is, the second direction Y perpendicular to the top, bottom (refer to FIG. 6) and the first direction X about the first direction X (the x-axis direction) in which the magnetic moving body 120 is linearly reciprocated. A pair of magnetic moving bodies 120 and a pair of solenoids such that the left and right (see FIG. 5) have a symmetrical structure with respect to the pair of solenoids 130 fixed to the housing 110 adjacent to each other 130 is disposed.

Openings 111 are formed in both side surfaces of the side surface of the housing 110 that face each other in the first direction X. FIG. That is, the pair of openings 111 are disposed to face each other along the first direction X (see FIG. 5, in the x-axis direction). An elastic body 140, which will be described later, is mounted on the outer side walls of the housing 110 at both sides of the opening 111 to provide an elastic force to the magnetic movable body 120 linearly reciprocating in the first direction X. The configuration of the elastic body 140 will be described later.

A damper 170 is provided on an inner wall of the housing 110. The damper 170 limits a distance that is moved during linear reciprocation of the magnetic moving body 120. The reason is to control the magnetic attraction between the magnetic movable body 120 and the solenoid 130. The damper 170 is installed on the inner wall of the housing 110 to face each other in the first direction X so as to adjust the distance between the linear and reciprocating movements of the magnetic moving body 120. Therefore, it is possible to adjust the movement interval of the magnetic movable body 120 linearly reciprocating in the first direction X according to the thickness or position of the damper 170. In the present embodiment, for example, four dampers 170 are arranged to face each other in the first direction X in close proximity to each corner of the rectangular housing 110. However, the damper 170 is not limited thereto. For example, the dampers 170 may be attached to both sides of the solenoid 130 to control magnetic attraction by adjusting the moving interval between the solenoid 130 and the magnetic moving object 120. Of course, if the position that can control the magnetic attraction between the magnetic body portion and the solenoid 130 by limiting the moving interval of the magnetic movable body 120, of course, various modifications are possible. The printed circuit board 112 is disposed on the inner bottom surface of the housing 110. Solenoid 130 to be described later is fixed to be electrically connected to the printed circuit board 112. A current, that is, an input signal is applied to the solenoid 130 using the printed circuit board 112.

The magnetic moving parts 120 are disposed in the housing 110 symmetrically with respect to each other with respect to the first direction X. The inner side of the housing 110 is installed to be movable in the first direction (X). Here, the first direction X is described above, but refers to a direction in which the magnetic movable body 120 linearly reciprocates, and will be described based on the x-axis direction with reference to FIG. 5. The magnetic moving body 120 includes a first magnetic body portion 121 and a second magnetic body portion 122 facing each other with respect to the second vertical direction Y in the first direction X, and includes a first direction ( It further comprises a weight member 123 disposed in X). That is, the weight member 123 disposed along the first direction X is disposed at the center of the housing 110, and the first magnetic body 121 is disposed along the second direction Y at both ends of the weight member 123. ) And the second magnetic body 122, and the first magnetic body 121 and the second magnetic body 122 are symmetrically disposed to face each other in the first direction (X).

The weight member 123 increases the weight of the magnetic moving body 120, thereby providing sufficient vibration force when the vibration module 100 operates. Therefore, it is preferable to manufacture the weight member 123 using tungsten or its alloy having the largest weight per unit mass. However, the material is not limited thereto and various materials may be used as long as the weight of the magnetic moving body 120 can be increased. Of course, the weight member 123 can be manufactured.

The first magnetic body 121 is disposed along the second direction Y at one end of the left side of the weight member 123 (see FIG. 5), and is formed on one side of the weight member 123 (the upper reference of FIG. 5). The first magnetic body 121a is provided, and the second magnetic body 121b adjacent to the first magnetic body 121a and the second direction Y is disposed on the other side of the weight member 123 (the lower part of FIG. 5). .

The second magnetic body part 122 is disposed along the second direction Y at one end of the right side (see FIG. 5) of the weight member 123, and faces the first magnetic body part 121 in the first direction X. FIG. Are placed facing each other. In addition, a space is formed between the first magnetic body 121 and the second magnetic body 122 so that the solenoid 130 to be described later is disposed. The second magnetic body 122 is provided with a third magnetic body 122a on the upper side of the right end of the weight member 123, and the third magnetic body 122a and the second direction (lower portion of the weight member 123). Along the Y), neighboring fourth magnetic bodies 122b are provided. Accordingly, the first magnetic body 121a and the second magnetic body 121b are disposed adjacent to each other along the second direction Y with respect to the weight member 123, and the third magnetic body 122a and the fourth magnetic body 122b. ) Are disposed adjacent to each other along the second direction (Y) around the weight member 123. In addition, the first magnetic body 121a and the third magnetic body 122a are disposed to face each other in the first direction X, and the second magnetic body 121b and the fourth magnetic body 122b may also face each other. Are arranged to face each other toward

Accordingly, the first magnetic body 121, the weight member 123, and the second magnetic body 122 are symmetrically arranged in both the first direction X and the second direction Y in a 'H' shape. . In addition, the solenoid 130 is disposed between the first magnetic body 121 and the second magnetic body 122 in the second direction Y so as to face each other with the weight member 123 interposed therebetween. It can be seen that both the first direction X and the second direction Y are symmetrically disposed.

6 is a perspective view schematically showing only some components of the vibration module shown in FIG. 5. Referring to FIG. 6, in the solenoid 130, two first and second solenoids 131 and 132 are symmetrically disposed on both sides of the weight member 123 about the weight member 123. The first and second solenoids 131 and 132 are fixed to the current on the bottom surface of the housing 110, more specifically, the printed circuit board 112 disposed on the housing 110.

The first solenoid 131 is disposed above the weight member 123 (based on FIG. 5) and is disposed between the first magnetic body 121a and the third magnetic body 122a. The first solenoid 131 is disposed to be spaced apart from the first magnetic body 121a and the third magnetic body 122a by a predetermined distance, so that the first magnetic body 121a and the third magnetic body 122a are respectively the first solenoid 131. It is a linear reciprocating movement toward or near). The first solenoid 131 is made of an iron-type material and is wound around the first core portion 131a and the outer circumferential edge of the first core portion 131a which are placed in the first direction X. In accordance with the first coil portion 131b to form an electromagnetic field.

The second solenoid 132 is disposed below the weight member 123 (see FIG. 5) to be disposed between the second magnetic body 121b and the fourth magnetic body 122b. The second solenoid 132 is disposed to be spaced apart from the second magnetic body 121b and the fourth magnetic body 1223b, respectively, so that the second magnetic body 121b and the fourth magnetic body 122b are close to the solenoid 130, respectively. It is a linear reciprocating movement in the direction of falling or away. The second solenoid 132 is made of an iron-type material and is wound around the second core part 132a and the second core part 132a which are positioned in the first direction X, and wound around the current. It includes a second coil portion 132b for forming an electromagnetic field in accordance with the flow.

When the same input signal is applied to the first and second solenoids 131 and 132, the repulsive force is provided between the first and second magnetic bodies 121a and 121b of the left side (see FIG. 5) of the first and second solenoids 131 and 132. Or the force of any one of the forces will act the same. In addition, the first and second solenoids 131 and 132 and the first and second magnetic bodies may be disposed between the right side of the first and second solenoids 131 and 132 (see FIG. 5) and the third and fourth magnetic bodies 122a and 122b. The force generated between 121a and 121b) and the opposite force act the same. That is, for example, an electromagnetic field is formed between the left side of the first and second solenoids 131 and 132 and the first and second magnetic bodies 121a and 121b so that an attractive force is applied to the first and second solenoids 131 and 132. When the electromagnetic field is formed between the right side and the third and fourth magnetic bodies 122a and 122b so that the repulsive force is applied, the magnetic movable body 120 moves to the left direction (see (c) of FIG. 3, moved downward). . In addition, an electromagnetic field is formed between the left side portions of the first and second solenoids 131 and 132 and the first and second magnetic bodies 121a and 121b so that a repulsive force acts, and the right side portions of the first and second solenoids 131 and 132. When the electromagnetic field is formed so that the attraction force acts between the third and fourth magnetic bodies 122a and 122b, the magnetic movable body 120 moves in the right direction (refer to FIG. 3B, upward). In addition, both ends of the first and second solenoids 131 and 132, more specifically, both ends of the first core part 131a and the second core part 132a are further provided with iron pieces 135, and the solenoid 120 is provided. And the magnetic force between the first and second magnetic bodies 121 and 122 can be doubled.

The first, second, third, and fourth magnetic bodies 121a, 121b, 122a, and 122b are provided with cover parts 160 that cover them. The cover part 160 is provided along the second direction Y at both ends of the weight member 123. The cover part 160 is disposed around the weight member 123, respectively, in ['and'] ', and the magnetic bodies 121a, 121b, 122a, and 122b are seated in the openings of the cover parts 160, respectively. .

The material of the cover part 160 may be made of iron material or sus material. In the present embodiment, the cover part 160 using sus material is described as an example.

FIG. 7 is a diagram illustrating magnetic attraction between moving magnetic bodies, the combined force of the magnetic attraction force and the restoring force of the spring and the total magnetic force distribution between the solenoid and the moving magnetic body when the cover of the magnetic moving object is iron in the vibration module shown in FIG. 5. In addition, FIG. 8 illustrates the magnetic attraction between the moving magnetic bodies, the force of the magnetic attraction force and the restoring force of the spring, and the distribution of the total magnetic force between the solenoid and the moving magnetic body when the cover of the magnetic moving object is made of SUS in the vibration module shown in FIG. 5. The figure shown.

7 and 8 are spaced apart from the iron pieces 135 disposed on both sides of the first and second core portions 131a and 132a and the first, second, third and fourth magnetic bodies 121a, 121b, 122a, and 122b. The distances are set to 0.8 mm, respectively, and the dampers 170 are installed at four corners of the housing 110 to face each other in the first direction X. Based on this, the case where the cover unit 160 is made of iron material and the case made of sus material is compared. When applying a sustain material close to 1, when the current is zero in the solenoid 130, a pulling force between the solenoid 130 and the first and second magnetic parts 121 and 122 (hereinafter, 1 force) and a pulling force between the electromagnetic field generated in the solenoid 130 and the first and second magnetic body parts 121 and 122 when the current is applied to the solenoid 130 (hereinafter referred to as 'second force'). For example, it can be seen that the cover portion 160 of sus material is larger than the cover portion 160 of iron material. Here, when no current flows in the solenoid 130, mutual magnetic attraction (first attraction) between the iron piece 135 and the first and second magnetic bodies 121 and 122 is represented by a dotted line, and the mutual magnetic attraction and the elastic body 140. The combined force of the resilience of) is shown by the thick solid line. In addition, after applying a current of 100 mA to the solenoid 130, the second pulling force generated between the solenoid 130 and the first and second magnetic body parts 121 and 122, and the restoring force of the elastic body 140 The added force is represented by a thin solid line.

Here, if the cover portion 160 made of iron material is applied, it can be seen that the first manpower is smaller than that of the cover part 160 made of sus material, and the second generated by applying current to the solenoid 130. It can also be seen that the attraction force is smaller than that applied to the cover portion 160 made of sus material. Therefore, in the state where the 100 mA current is applied to the solenoid 130, the maximum displacement that the magnetic movable body 120 can linearly reciprocate by the attraction force with the first and second magnetic body parts 121 and 122 is the cover part of iron material ( When using the 160, the left and right of about 0.1mm, when using the cover portion 160 made of sus material, it can be seen that up to 0.3mm left and right. Therefore, when driving the vibration module 100, it is preferable that the cover portion 160 is made of a sus material so as to strengthen the vibration force / impact amount. In addition, an opening 111 is formed at a side surface of the housing 110 facing each other in the first direction X (see FIGS. 5 and 6). In the opening 111, an elastic body 140 for elastically supporting the magnetic moving body 120 that is linearly reciprocated in the first direction X is disposed.

9 is a perspective view illustrating an elastic body in the vibration module shown in FIG. 5, and FIG. 10 is a plan view of the elastic body in FIG. 5.

9 and 10, the elastic body 140 includes a multistage leaf spring. That is, when the elastic body 140 is viewed in plan view, it is formed in a clip shape. The shape of the elastic body 140 includes a first support part 141, an elastic frame 142, and a second support part 143. The first support part 141 is formed in a rectangular frame shape, and an opening 141a is formed inward. The first support part 141 is disposed and fixed to the opening 111 of the housing 110. In the elastic frame 142, two first elastic bars 142a protrude obliquely from the left side to the right side of the opening 141a of the first support part 141 (refer to FIG. 10), rather than the center of the weight member 123. Extend longer. The second support part 143 extends from the end of the elastic frame 142 and is closely attached to the center of the weight member 123. At this time, the second support part 143 is connected by the second elastic bar 143a extending inclined in the left direction from the connecting bar 142b connecting the end of the first elastic bar 142a of the elastic frame 142. The elastic body 140 has a symmetrical structure in an up and down direction (refer to FIG. 8) based on the second direction Y. Referring to FIG. In addition, the elastic body 140 disposed on the left side of the housing 110 and the elastic body 140 disposed on the right side are disposed in a symmetrical form in which end portions are similar to each other (see FIG. 4).

Since the elastic body 140 has a vertically and symmetrical structure with respect to the second direction Y, the elastic body 140 may minimize distortion of the elastic body 140 and distortion generated when the magnetic moving body 120 is driven. In addition, when the elastic body 140 on the left or right side is compressed by the magnetic moving body 120, the first elastic bar 142a and the second elastic bar 143a contract and expand, respectively, in the second direction (Y). The displacement is minimized, and the displacement occurs only in the first direction X, thereby improving the reliability of the elastic body 140.

100: portable terminal 110: housing
111: opening 120: magnetic moving object
121: S magnetic body portion 121a: first magnetic body
121b: second magnetic body 122: second magnetic body
122a: third magnetic body 122b: fourth magnetic body
123: weight member 130: solenoid
131: first solenoid 132: second solenoid
135: iron piece 140: elastic body
141: first support portion 142: elastic frame
143: second support portion 160: cover portion
170: damper

Claims (22)

In the vibration module of a portable terminal,
housing;
A pair of magnetic moving parts installed in the housing to be movable in a first direction; And
A pair of solenoids disposed between the magnetic moving bodies,
And the magnetic moving bodies and the solenoids are symmetrically disposed about the first direction.
The method of claim 1,
The housing further includes a pair of elastic bodies,
The elastic body is installed in the housing facing each other in the first direction, the vibration module of the portable terminal, characterized in that for supporting the magnetic moving body to flow in the first direction.
The method of claim 2, wherein the magnetic moving body,
A weight member disposed in the first direction;
A first magnetic body part disposed at one end of the weight member and disposed along a second vertical direction of the first direction;
And a second magnetic body facing the first magnetic body and disposed at the other end of the weight member and disposed along the second direction.
The method of claim 3,
The magnetic moving body is a vibration module of a portable terminal, characterized in that the 'H' shape.
The method of claim 3,
The solenoid vibration module of the portable terminal, characterized in that disposed between the first magnetic body portion and the second magnetic body portion.
The method of claim 5, wherein the first magnetic body portion,
A first magnetic body disposed on one side of the weight member; And
And a second magnetic body positioned adjacent to the first magnetic body along the second direction and disposed on the other side of the weight member.
The method of claim 6, wherein the second magnetic body portion,
A third magnetic body disposed on one side of the weight member and positioned to face the first magnetic body in the first direction; And
And a fourth magnetic body disposed adjacent to the third magnetic body along the second direction to face the second magnetic body in the first direction and disposed on the other side of the weight member. Vibration module.
The method of claim 7, wherein the solenoid,
A first solenoid disposed between the first magnetic body and the third magnetic body toward one side of the weight member; And
And a second solenoid disposed between the second magnetic body and the fourth magnetic body on the other side of the weight member.
The method of claim 8, wherein the magnetic moving body,
A first magnetic path connected to the first magnetic body, the first solenoid, and the third magnetic body; And
And a second magnetic path connected to the second magnetic body, the second solenoid, and the fourth magnetic body,
And the first magnetic path and the second magnetic path are symmetrical.
The method of claim 8, wherein the first solenoid,
A first core part disposed in the first direction; And
A first coil part wound around an outer circumference of the first core part,
The second solenoid is,
A second core part disposed in the first direction; And
And a second coil part wound around an outer circumference of the second core part.
9. The method of claim 8,
Both ends of the first, second solenoids vibration module of the portable terminal, characterized in that it further comprises an iron piece.
The method of claim 3,
Vibration module of the portable terminal, characterized in that the cover portion for mounting the first and second magnetic body portion is provided on both sides of the end of the weight member.
The method of claim 12,
The cover module vibrating module of the portable terminal, characterized in that comprises a SUS material.
The method of claim 3,
The weight member is a vibration module of a portable terminal, characterized in that comprises a tungsten material.
The method of claim 3,
Openings facing each other are formed at both sides of the housing,
The vibration module of the portable terminal, characterized in that the elastic body is mounted to each of the openings.
15. The method of claim 14,
The elastic body comprises a multi-stage leaf spring,
The multi-stage leaf spring,
A first support portion mounted to the opening;
A second support part supported at the center of the weight member; And
Vibration module of a portable terminal, characterized in that it comprises an elastic plate that connects the first, second support and provides elasticity.
The method of claim 1,
The housing further comprises at least one pair of dampers for limiting the movement interval between the magnetic movable body and the solenoid vibration module of the portable terminal.
In the vibration module of a portable terminal,
A first magnetic path comprising a pair of first magnetic force generating means and a first electromagnetic force generating means disposed between the first magnetic force generating means; And
A second magnetic path including a pair of second magnetic force generating means and second electromagnetic force generating means disposed between the second magnetic force generating means,
The first magnetic path and the second magnetic path are symmetrically provided with each other, the vibration module of the portable terminal, characterized in that the linear reciprocating motion in the first direction.
19. The method of claim 18,
And a weight member provided in the first direction between the first magnetic path and the second magnetic path.
20. The method of claim 19,
The first magnetic force generating means is provided a pair symmetrically on both ends of the weight member,
The second magnetic force generating means is a vibration module of a portable terminal, characterized in that a pair is provided symmetrically on both ends of the weight member.
20. The method of claim 19,
As the voltage is applied to the first and second electromagnetic force generating means, the first and second magnetic force generating means vibrate linearly reciprocating away from or near the first and second electromagnetic force generating means. module.
19. The method of claim 18,
Vibration module of the portable terminal further comprises a cover portion of the SUS material covering the first magnetic force generating means and the second magnetic force generating means.

Images