KR20120018405A

KR20120018405A - Horizontal linear vibrator

Info

Publication number: KR20120018405A
Application number: KR1020100081181A
Authority: KR
Inventors: 이인호
Original assignee: 이인호
Priority date: 2010-08-23
Filing date: 2010-08-23
Publication date: 2012-03-05

Abstract

The present invention relates to a linear vibrator having a coil support and a spring support, having a permanent magnet, a coil part and a circuit board inside the case, and acting between the coil part and the permanent magnet when power is input from the outside through the circuit board. In the linear vibrator in which the mass vibrates due to electromagnetic force, the mass support is secured to maximize the moving space of the moving part and the high-efficiency electromagnetic field structure enables a compact and lightweight structure and provides a small high vibration horizontal vibrator.

Description

Horizontal Linear Vibrator

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

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-mentioned problems of the prior art, and provided with a permanent magnet, a coil part and a circuit board in the case, the power between the coil and the permanent magnet when the power is input from the outside through the circuit board In a linear vibrator in which a mass body vibrates horizontally by an acting electromagnetic force, the vibration direction vibrates in the horizontal direction, which is the longitudinal direction of a personal portable terminal or a game machine, and has a highly efficient electromagnetic structure, which enables a compact and lightweight structure, and the vibration force. The purpose is to provide this high horizontal vibrator.

In order to achieve this purpose, a case having a predetermined space therein,

Coils disposed in the inner space of the case, Permanent magnets disposed so that the electromagnetic force and the coil, Mass body moving by the electromagnetic force of the permanent magnet and the coil,

In the spring structure disposed at least one between the movement portion coupled to the permanent magnet and the mass, the power connection portion for supplying power to the coil, the movement portion and the inside of the case, the mass is composed of a plurality of fixed the mass It characterized in that it comprises a mass support.

The coil, the mass support and the spring in the movement direction of the movement portion at the center of the coil may be characterized in that arranged in the order.

In addition, the mass support may be made of a ferromagnetic material.

The mass support is composed of several parts, but by mixing a magnetic material and a non-magnetic material

It may be characterized in that the configuration.

It is characterized in that it has a space in which the mass is not disposed on both sides of the mass supporter formed in the movement direction of the moving part.

According to the present invention, a horizontal linear vibrator having a permanent magnet, a coil part, and a circuit board inside the case, the mass body vibrating by an electromagnetic force acting between the coil part and the permanent magnet when power is input from the outside through the circuit board. By vibrating in the horizontal direction, which is the length or the width direction rather than the thickness direction of the personal portable terminal, it is possible to sufficiently secure the movement displacement space of the vibration unit, thereby further improving the vibration performance. In addition, the magnet is arranged symmetrically on both sides of the coil to maximize the electromagnetic efficiency, and to secure a space to move the movement to the maximum, there is an effect of generating a high vibration force in a small volume.

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.
Figure 4 is an exploded perspective view of a linear vibrator having a mass support according to an embodiment of the present invention.
5 is a plan view and a front view of FIG.
6 is an exploded perspective view of a moving part having the mass support of FIG. 4, which is an embodiment of the present invention;
Figure 7 is an exploded perspective view of the coil support in accordance with an embodiment of the present invention.

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

4 is an exploded perspective view of a linear vibrator having a mass support according to an embodiment of the present invention, and FIG. 5 is a plan view and a front view of FIG. 4. 6 is an exploded perspective view of a moving part having the mass support of FIG. 4, which is an embodiment of the present invention, and FIG. 7 is an exploded perspective view of the coil support according to an exemplary embodiment of the present invention.

Referring to the drawings, the linear vibrator 100 having a mass support 114 according to an embodiment of the present invention is a permanent magnet 113, coil unit 125, coil support 131, spring 123, power connection It is configured to include a mass body 121 and the vibration absorbing member 130 provided in the case 110 provided with a (115).

In detail, the case 110 has the lower case 111a and the upper case 111b coupled to each other and have an empty space therein. Case 110 according to an embodiment of the present invention preferably has a hexahedral shape having an upper, a lower surface, a front, a rear side, a left, a right side.

The center portion of the case 110 has a plurality of mass body 121, is attached to the mass support 114 and the permanent magnet 113 is attached to the inside of the mass support 114, respectively. At this time, when the permanent magnet 113 is attached to the inside of the mass body 121, a ferromagnetic material such as iron plate, SUS, etc. is usually used as the mass support 114 to maximize the electromagnetic efficiency.

The coil support 131 is attached to one inner surface of the case 110. One side of the coil support 131 is attached to the coil 125 for generating an electromagnetic force, and the leading edge connecting portion 115 is attached to the end of the coil 125 so as to easily connect the coil lead wire. In this case, the power connection unit 115 mainly uses a flexible circuit board in consideration of workability and flexibility. The power connection unit 115 is attached along the guide groove 116 formed on one side of the lower case 111a to facilitate the power connection from the outside. The guide groove 116 is mainly formed using a forging process. The spring 123 is disposed between the outside of the mass body 121 and the inside of the case 110. The spring 123 is fixed using the spring support 140 and the spring support protrusion 141, the spring support 140 is fixed to the mass body 121 or the case 110. The present invention is a magnetic force is generated when the current supplied through the power connection portion 115 from the outside flows to the coil 125, the generated magnetic force pushes and pulls the permanent magnet 113 disposed around the coil 125 To generate a force for the mass body 121 to vibrate. At this time, the vibration force is maximized by the resonance frequency between the spring 123 on one side or both sides of the mass body 121 and the moving part 112 including the spring 123 and the mass body 121. There is a damper 120 inside the spring 123. The damper 120 is attached to prevent the mass body 121 from colliding directly with the case 110 to generate noise or mechanical distortion. In particular, the horizontal vibrator 100 has a structure that maximizes the vibration force by using the resonant frequency of the spring 123 and the movement unit 112. When the use frequency bandwidth is determined based on the resonant frequency, the amount of vibration is relatively high in the use frequency band. The damper 120 performs the role of making it constant.

In addition, when the moving part 112 including the mass body 121 performs the horizontal reciprocating motion, the mass body 121 does not move only in the reciprocating direction but also generates a force moving in the direction perpendicular to the reciprocating direction. 112 strikes the case 110 and as a result generates noise. In order to prevent such noise, the vibration absorbing member 130 is disposed between the exercise part 112 and the case 110.

In the present invention, when the parallel line is drawn in the direction of movement of the spring 120 at the center point of the coil 125, the coil 125, the mass support 114, the spring 123, and the case 111 are disposed in the order. Can be. An important point here is that the mass body 121 is not disposed on at least a portion of one side of the mass support body 114 facing the spring in the arrangement direction. Usually, when the mass body 121 is integrally formed and assembled, the productivity and the process are improved in various ways. However, if a part of the mass body 121 is disposed in the direction of movement of the spring 123 (for example, a hexahedron having a hole therein), the moving part 112 is equal to the thickness of the mass body 121 disposed in the direction of movement of the spring 123. ) Will reduce the moving space. Assuming that the operating frequency is constant, as the weight of the exercise unit 112 and the reciprocating distance of the exercise unit 112 increase, the magnitude of the vibration increases, so that the displacement of the exercise unit 112 decreases due to the thickness of the mass body 121. The amount can only be reduced. The present invention mass body 121 in the movement direction of the movement portion 112 between the coil 125 and the spring 123 to maximize the movement displacement when the movement portion 112 moves in the movement direction of the spring 123. By arranging the mass support 114 made of a thin steel sheet without arranging, the movement displacement space of the movement part 112 was maximized. And with mass support 114

By using the steel sheet material, even if the plurality of mass bodies 121 were formed integrally with the mass support 114, there was no deformation in the external impact or the like, and a sturdy structure was formed. If so arranged, the distance between the nose 125 and the moving part 112 is maximized. The vibration amount can be increased. In particular, the present invention is an example in which the mass support 114 is integrally formed in a cross shape. Due to the cost of mechanical strength, mold cost, and material cost depending on the structure of the product, ferromagnetic materials are used on the rear of the permanent magnet 113 to maximize electromagnetic energy efficiency, and other parts of the mass support 114 are mechanically nonmagnetic materials. It is a strong material and can be separated into several pieces. In particular, stainless steel sheet, phosphor bronze sheet, zinc or aluminum sheet, etc. may be used in consideration of strength and material cost.

In the present invention, there are various methods of fixing the mass body 121 or the permanent magnet 113 to the spring support 114, and welding, caulking, bonding, fixing methods using grooves and protrusions can be used.

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 111a: lower case
111b: upper case 112: athletic part
113: permanent magnet 114: mass support (yoke)
115: power connection 116: guide groove
120: damper 121: mass
121a, 121b: mass 123a, 123b: spring
125 coil 130 vibration absorbing member
131: coil support 135: cogging protrusion
140: spring support 141: spring support projection

Claims

A case having a predetermined space therein,
A coil disposed in the inner space of the case,
Permanent magnets arranged to act on the coil and electromagnetic force,
Mass body moving by the electromagnetic force of the permanent magnet and the coil,
A movement unit in which the permanent magnet and the mass are combined;
A power connection unit for supplying power to the coil,
In the spring structure disposed at least one between the moving part and the inside of the case,
The mass is composed of a plurality of horizontal linear vibrator comprising a; mass support for fixing the mass;

The method of claim 1,
A horizontal linear vibrator arranged in the order of the coil, the mass supporter, and the spring in the direction of movement of the moving part at the center of the coil;

The method of claim 1,
The mass support is a horizontal linear vibrator, characterized in that made of ferromagnetic material

The method of claim 1,
The mass support is composed of several parts, but by mixing a magnetic material and a non-magnetic material
Horizontal linear vibrator, characterized in that

The method of claim 1,
Horizontal linear vibrator, characterized in that it has a space in which the mass is not disposed on both sides of the mass supporter formed in the movement direction of the moving part