KR20120050362A

KR20120050362A - Vertical linear vibrator

Info

Publication number: KR20120050362A
Application number: KR1020100111819A
Authority: KR
Inventors: 이인호; 정세명
Original assignee: 이인호
Priority date: 2010-11-10
Filing date: 2010-11-10
Publication date: 2012-05-18
Also published as: KR101184408B1

Abstract

According to the present invention, there is provided as a linear vibrator having a permanent magnet, a coil part, and a power connection part inside the case, when the mass is vibrated by an electromagnetic force acting between the coil part and the permanent magnet when power is input from the outside through the power connection part. ,
The spring member is placed between the bracket and the moving part to enable normal operation even without a case, thereby freely reducing the thickness according to the case material and shape, and in particular, the product is easily assembled and inspected in the production process to maximize productivity. In addition, by using a plurality of permanent magnets to form the maximum electromagnetic force in a small space by constructing a highly efficient magnetic circuit to provide a vertical oscillator to obtain a miniaturized, slim, high vibration amount.

Description

Vertical Linear Vibrator

The present invention relates to a vertical linear vibrator, and more particularly, to a vertical linear vibrator which is designed to vibrate mounted on a personal portable terminal, a game machine or a remote control.

In general, one of the essential functions of a communication device is an incoming call function. The most common types of incoming calls are vocalizations such as melodies and bells, and vibrations that cause the device to shake. Especially, the vibration function is mainly used when the melody or bell is transmitted to the outside through the speaker to avoid any damage to others. For this vibration, a small vibrator is driven to transmit the driving force to the case of the device. It is common for the device to vibrate.

In addition, in recent years, as the spread of touch screen mobile phones increases, a vibrator is required to provide a virtual touch feeling to a user beyond a reception function instead of a melody.

Vibration motors currently applied to mobile phones generate rotational force to obtain mechanical vibrations using the unbalanced mass rotating parts. Most vibration motors used at this time supply current using a brush and a commutator.

As such, a vibrator mounted on a mobile phone or a game machine is required to have a long life, a small size, and excellent vibration performance.

1 is a cross-sectional view showing a conventional rotary vibrator, Figure 2 is a view showing the FPCB of Figure 1, Figure 3 is a view showing the rotor of FIG.

Referring to the drawings, the method of supplying external power to the coil 25 provided in the moving body 20 in the conventional rotary vibrator 10 is as follows.

First, power is supplied to the rotary vibrator 10 through the lead wire 17 fixed to the case 11. The lead wire 17 is electrically connected to the FPCB (Flexible Printed Circuit Board) 15 by soldering or the like, and the circuit pattern as shown in FIG. 2 is formed on the FPCB 15 so as to be electrically connected. do.

Referring to FIG. 2, the FPCB 15 has a lead wire connecting terminal 15a electrically connected to the lead wire 17 at one end thereof, and a power connector connecting terminal electrically connected to the brush type power connector 19 at the other end thereof. 15b is formed.

On the other hand, a coil 25 is located on the moving body 20, and the coil 25 is electrically connected to the circuit board 15. Referring to FIG. 3, a plurality of commutator patterns 16 are formed on the circuit board 15 such that the power connection 12 may be in electrical sliding contact.

In the conventional rotary vibrator 10 configured as described above, when external power is supplied through the lead wire 17, the circuit board 15 disposed on the moving body 20 through the FPCB 15 and the brush-type power connection unit 19. Is passed on. Then, the power delivered to the circuit board 13 of the moving body 20 is delivered to the coil 25 electrically connected to the circuit board 15.

When power is applied from the outside, the moving body 20 and the circuit board 15 are rotated by the electromagnetic force, and vibration is generated. The brush-type power connection unit 19 and the circuit board 15 are electrically connected while performing frictional motion.

The circuit board 15 is arranged by dividing the commutator 16 into several pieces so that the rotor 14 properly supplies power to the coil 25 while the rotor 14 properly rectifies. In the related art, the moving body 20 is supported and rotated about the shaft 21 to reduce noise with high precision of the bearing 23 and the shaft 21, and the bearing 23 between the shaft 21 and the bearing 23. The oil from the) improves lubrication and reduces noise.

However, such a structure is difficult to generate the vibration only in one axis by vibrating in two axes as the moving body 20 rotates around the shaft 21. In addition, by using the rotational force, the inertia of the rotor is poor in responsiveness, which is not suitable for a function requiring fast response. In addition, there is a problem of shortening the life due to the mechanical friction caused by using a brush and a commutator.

The present invention has been made to solve the above-described problems of the prior art, having a permanent magnet, a coil and a power connection in the interior of the case, when the power is input from the outside through the power connection to act between the coil and the permanent magnet In a linear vibrator in which a mass vibrates vertically by an electromagnetic force, it has a responsiveness, a long life, and a high-efficiency electromagnetic field structure, thereby enabling a compact and lightweight structure and providing a vertical vibrator having high vibration force.

In order to achieve the above object, a case having a predetermined space therein, a yoke disposed in the inner space of the case, a magnetic circuit part mounted under the magnetic circuit part to have a permanent magnet mounted to the yoke to create a magnetic field of a certain intensity, A vibration generating coil for generating an electric field when applied, a power connection unit configured to apply power to the coil, a bracket integrally formed with the coil and the power connection unit, a spring member fixed to an upper end of the bracket and fixed to a lower end of the magnetic circuit unit, A moving part having a mass body integrally mounted to the magnetic circuit part and vibrating up and down by using the elasticity of the spring member together with the magnetic circuit part, and preventing the direct contact between the case or the bracket and absorbing shock when the moving part vibrates up and down; Case or the bracket and the moving part The arrangement comprises a damping member, and provides a linear vibrator, it characterized in that the magnetic circuit and a moving part reciprocating motion in the interaction of electromagnetic force between the coil.

The damping member may be separately installed between the case and the moving part or between the bracket and the moving part.

In addition, a case having a predetermined space therein, a yoke disposed in the inner space of the case, a first permanent magnet mounted to the yoke to create a magnetic field of a certain intensity,

A second permanent magnet mounted on the yoke and disposed side by side in the same magnetic force line direction as the first permanent magnet, and a moving part including a mass coupled to one side of the second permanent magnet;

A coil disposed between the first permanent magnet and the second permanent magnet to generate an electric field when power is applied, a power connector configured to apply power to the coil, a bracket integrally formed with the coil and the power connector, and an upper end of the bracket A damping member disposed in the spring member and fixed to the bottom of the moving part, the case or the bracket and the moving part,

The first and second permanent magnets and the second permanent magnet and the coil is characterized in that the movement unit reciprocates by the interaction of the electromagnetic force.

In addition, the coil is disposed between the first permanent magnet and the second permanent magnet.

And it is characterized in that the lower plate is mounted to form the magnetic flux of the permanent magnet on the lower surface of the first permanent magnet and the second permanent magnet

In addition, a coil fixing protrusion for adjusting the fixed height of the coil is arranged so that the center of thickness of the lower plate mounted on the bottom surface of the first permanent magnet and the second permanent magnet is aligned with the center of the coil height when the power is turned off. It features.

In addition, a connection part between the spring member and the bottom plate may be grooved in a part of the bracket facing the bottom plate to minimize contact with the bracket during operation.

In particular, the case may be removed to reduce the height of the linear vibrator.

At this time, the normal operation is made.

And one side of the spring member is mounted on the lower plate.

According to the present invention, there is provided as a linear vibrator having a permanent magnet, a coil part and a power connection part inside the case, and the mass body vibrates by an electromagnetic force acting between the coil and the permanent magnet when power is input from the outside through the power connection part.

The spring member is placed between the bracket and the moving part to enable normal operation even without a case, thereby freely reducing the thickness according to the case material and shape, and in particular, the product is easily assembled and inspected in the production process to maximize productivity. In addition, by using a plurality of permanent magnets to form a high-efficiency magnetic circuit to generate the maximum electromagnetic force in a small space there is an effect to obtain a miniaturized, slim, high vibration amount.

1 is a cross-sectional view showing a conventional rotary vibrator.
FIG. 2 shows the FPCB of FIG. 1. FIG.
3 shows the rotor of FIG. 1.
4 is a cross-sectional view according to an embodiment of the present invention.
5 is a cross-sectional view of a structure using a plurality of permanent magnets according to another embodiment of the present invention
6 is an exploded perspective view of FIG. 5 according to an embodiment of the present invention;
7 is an embodiment of a weight adjustment protrusion according to an embodiment of the present invention

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view according to an embodiment of the present invention. Referring to the drawings, there is a case 110 having a predetermined space therein, a yoke 114 disposed in the inner space of the case 110, and a permanent magnet 113 is mounted inside the yoke 114. The magnetic circuit unit 116 is configured to generate a magnetic field of a certain intensity. The magnetic circuit unit 116 crosses the coil 125 disposed adjacent to the magnetic flux generated from the permanent magnet 113 mounted on the yoke 114 through the lower plate 114a and again through the yoke 114. It is configured to flow into the permanent magnet (113).

The vibration generating coil 125 is disposed between the permanent magnet 113 and the yoke 114 under the magnetic circuit unit 116 to generate an electric field when power is applied. And a power connection unit 115 configured to apply power to the coil 125. Usually, the power connection unit 115 uses a lot of flexible circuit boards. In particular, the power connection unit 115 is disposed in the escape groove 133 formed in the bracket 111 to maximize the movement space of the movement unit 112. The coil 125 and the power connection unit 115 are integrally formed on the bracket 111. The spring member 123 fixed to the upper end of the bracket 111 and fixed to the lower end of the magnetic circuit unit 116 is mounted. . In addition, the moving part 112 includes a mass body 121 integrally mounted to the magnetic circuit part 116 and vibrates up and down by using the elasticity of the spring member 123 together with the magnetic circuit part 116. The movement part 112 is disposed between the case 110 or the bracket 111 and the movement part 112 to prevent direct contact between the case 110 or the bracket 111 when absorbing up and down and absorb shock. Place the damping member 120.

The operation of the vertical vibrator 100 having such a configuration is that the magnetic field generated by the magnetic circuit unit 116 and the vibration generating coil when the power applied through the power connection unit 115 is supplied to the vibration generating coil 125. Due to the interaction between the electric field generated at 125, the moving part 112 including the permanent magnet 113, the lower plate 114a, the yoke 114, and the mass body 121 connects the spring member 123. It runs on the bracket 111 as a ring to vibrate in the vertical direction.

In the related art, the moving part 112 including the mass body 121 vibrates up and down by running on the case 111 by using the spring member 123 as a connecting ring, but the case 110 and the bracket 111 must be vibrated. Vibration characteristics can be known only when integrally assembled, and repair is almost impossible when frequency characteristics are poor.

Therefore, by fixing the spring member 123 to the bracket 111 as in the present invention, it is possible to inspect the vibration characteristics and frequency characteristics of the product without covering the case 110, and also to eliminate the case 110 and immediately vertical vibrator 110 By allowing the direct mounting to the application target, such as a mobile phone or game machine that is used) can reduce the height generated by using the case 110 and the cost is reduced. In particular, the weight adjusting groove 210 is attached to the weight adjusting groove 200 as necessary by placing the weight adjusting groove 200 in a part of the exercise part 112. The vibrator uses resonance characteristics and the resonance frequency has the following characteristics.

Resonance Frequency = C * Root (M / k): C-Constant, M-Mass, k-Spring Constant

Therefore, it can be seen from the above equation that the resonance frequency changes when the mass changes.

By using this principle, the weight adjusting groove 200 and the weight adjusting protrusion 210 are properly used.

By adjusting the resonant frequency characteristics, resonant frequency defects caused by raw material deviation, welding defect or assembly deviation can be greatly reduced.

5 is a cross-sectional view of a structure using a plurality of permanent magnets according to another embodiment of the present invention and Figure 6 is an exploded perspective view of Figure 5 according to an embodiment of the present invention.

Referring to the drawings, there is a case 110 having a predetermined space therein, and a yoke 114 disposed in an inner space of the case 110, and a first permanent magnet 113a and a first inside of the yoke 114. 2 permanent magnets (113b) is mounted to form a magnetic circuit portion 116 to create a magnetic field of a certain intensity. The magnetic circuit unit 116 crosses the coil 125 disposed adjacent to the magnetic flux generated from the first permanent magnet 113a mounted to the yoke 114 through the lower plate 114a and again to the second permanent magnet. It is configured to flow through the yoke 114 back through the 113b to the first permanent magnet 113a. The magnetic circuit unit 116 configured as described above generates a much larger magnetic force than the magnetic circuit using one permanent magnet 113 to generate a current in the coil 125 disposed between the first permanent magnet 113a and the second permanent magnet 113b. As the vibration force increases, the force increases significantly at the same current. This makes it possible to create highly efficient ultra slim vertical oscillators.

In addition, disposed between the permanent magnet 113 and the yoke 114 under the magnetic circuit unit 116, the vibration generating coil 125 to generate an electric field when power is applied.

In particular, when the power is turned off, the attachment position of the coil 125 is adjusted to match the center of the winding height of the coil 125 and the center of the thickness of the lower plate 114a of the permanent magnet 113, wherein the coil support 131 To adjust the height. The reason for adjusting the height is to obtain the optimum electromagnetic force. If the coil is directly mounted on the bracket 111 or the power connection unit 115, the permanent magnet has a height that can be lowered to the maximum by the damping member 120, and the coil can not be lowered below that point. The part is low in electromagnetic efficiency. In other words, if you want to configure the product as thin as possible to the slim, the position of the coil 125 to optimize the position of the permanent magnet 113 and by eliminating the winding portion of the unnecessary coil 125 can reduce the resistance and maximize the efficiency. .

Then, one side of the spring member 123 is fixed to one side of the lower plate 114a disposed below the second permanent magnet 113b by welding, bonding, or caulking, and another side of the spring member 123 is bracketed. By fixing to the 111, it is possible to inspect the vibration characteristics and frequency characteristics of the product without covering the case 110, and also to remove the case 110, the application of a mobile phone or a game machine such that the vertical vibrator 110 is used directly By allowing direct mounting to the target product, a portion of the instrument portion of the target product functions in place of the case 110, thereby reducing the height generated by using the case 110 and reducing the cost.

In addition, the weight adjustment groove 200 may be attached to the weight adjustment groove 200 as necessary to adjust the resonance frequency by placing the weight adjustment groove 200 in a part of the movement part 112.

In addition, the damping member 120 is disposed between the movement part 112 and the case 110 or between the movement part 112 and the bracket 111 in order to reduce noise when the movement part 112 moves up and down.

7 is a structural example of the weight adjustment protrusion 210 according to an embodiment of the present invention.

By selecting the weight adjustment protrusion 210 having the desired mass according to the adjustment width of the frequency

It is to be mounted on the weight adjustment groove (200). And the shape of the weight adjustment protrusion 210 is configured to match the shape of the weight adjustment groove (200).

In the above, the configuration and operation of the present invention has been shown in accordance with the above description and drawings, but this is merely an example, and various changes and modifications are possible without departing from the spirit and scope of the present invention. .

100: linear vibrator
110: case 111: bracket
112: exercise unit 112: exercise unit
113: permanent magnet 113a: the first permanent magnet
113b: 2nd permanent magnet 114: York
114a: bottom plate 115: power connection
120 damping member 121 mass body
123: spring member 125: coil
131: coil support 133: escape groove
200: weight adjustment groove 210: weight adjustment projection

Claims

A case having a predetermined space therein,
Yoke disposed in the inner space of the case,
Magnetic circuit unit is mounted to the yoke to create a magnetic field of a certain strength,
A vibration generating coil disposed under the magnetic circuit unit to generate an electric field when power is applied;
A power connection configured to apply power to the coil,
A bracket integrally formed with the coil and the power connection unit,
A spring member having one side fixed to the top of the bracket and another side fixed to the bottom of the magnetic circuit unit,
A moving part having a mass body integrally mounted to the magnetic circuit part and vibrating up and down by using the elasticity of the spring member together with the magnetic circuit part;
And a damping member disposed between the case or the bracket and the moving part to prevent direct contact between the case or the bracket and absorb shock when the moving part is vibrated up and down.
By the interaction of the electromagnetic force between the magnetic circuit portion and the coil, the movement portion reciprocates
Linear vibrator, characterized in that

The method according to claim 1,
A linear vibrator, characterized in that the end of the yoke is formed to extend integrally outward in a direction perpendicular to the direction of movement and to fix one side surface of the spring member to the extended portion.

The method according to claim 1,
And a damping member mounted separately between the case and the moving part and between the bracket and the moving part, respectively.

A case having a predetermined space therein,
Yoke disposed in the inner space of the case,
A first permanent magnet mounted to the yoke to create a magnetic field of a certain intensity,
A second permanent magnet mounted to the yoke and arranged side by side in the same magnetic force line as the first permanent magnet
A moving part including a mass coupled to one side of the second permanent magnet,
A coil disposed between the first permanent magnet and the second permanent magnet to generate an electric field when power is applied;
A power connection configured to apply power to the coil,
A bracket integrally formed with the coil and the power connection unit,
A spring member fixed to the upper end of the bracket and fixed to the lower end of the moving part;
A damping member disposed between the case or the bracket and the moving part,
A linear vibrator, characterized in that the movement unit reciprocates by the interaction of the electromagnetic force between the first permanent magnet and the second permanent magnet and the coil

The method of claim 4, wherein
A linear vibrator, wherein the coil is disposed between the first permanent magnet and the second permanent magnet

The method of claim 4, wherein
Linear vibrator, characterized in that for mounting the lower plate to form the magnetic flux of the permanent magnet on the lower surface of the first permanent magnet and the second permanent magnet

The method according to claim 1, wherein
Characterized in that the coil support for adjusting the fixed height of the coil in order to arrange the center of the thickness of the lower plate mounted on the bottom surface of the first permanent magnet and the second permanent magnet so that the center of the coil height in the power off state Linear vibrator

The method according to claim 1, wherein
A linear vibrator comprising an escape groove in a portion of the bracket or the case facing the lower plate to minimize contact with the bracket during operation of the connection portion between the spring member and the lower plate.

The method according to claim 1, wherein
A linear vibrator, wherein the case is removed to reduce the height of the linear vibrator

The method according to claim 1, wherein
A linear vibrator for adjusting the resonant frequency by placing a weight adjusting groove on a portion of the moving part and mounting a weight adjusting protrusion to the weight adjusting groove.

The method according to claim 1, wherein
Magnetic vibrator is disposed around the permanent magnet or the damping member to reduce the contact noise between the moving part and the case or the moving part and the bracket.

The method of claim 4, wherein
Linear vibrator, characterized in that for mounting the one side of the spring member on the lower plate