KR101431779B1 - The vibrator - Google Patents

Abstract

The present invention relates to a vibration motor and, more specifically, to a vibration motor capable of generating vibration force by reacting a magnetic circuit having an N-pole and an S-pole according to an alternating signal supplied to a coil, in particular, by a reciprocating motion while drawing an arc along with the reciprocating motion. The vibration motor (100) comprises: a case (110); a vibration inducing means (120) which is arranged inside the case (110) to allow flow of an alternating signal inputted from the outside; a vibration reacting means (130) which reacts to the alternating signal to generate a vibration sound or vibration force during a linear reciprocating motion; and springs (140) which are formed as identical units to both sides of the case (110) in the vibration direction and support a shot by being respectively pulled toward the inside to be bonded to the vibration reacting means (130). The springs (140) are formed as identical units to both sides of the case (110) in the vibration direction and support the shot by being respectively pulled toward the inside in a state of not being bent to be bonded to the vibration reacting means (130). Therefore, the vibration motor can minimize pulling force acted in the opposite direction to the proceeding direction in horizontal vibration while allowing the vibration reacting means (130) to be supported without leaning to one side in a normal state, thereby preventing loss of the vibration force.

Description

VIBRATOR {

The present invention relates to a vibration motor, and more particularly, to a vibration motor in which a magnetic circuit (including a weight member) having N poles and S poles responds to an alternating signal flowing to a coil, And a spring structure in which the magnetic circuit (including a weight member) is integrally formed on the case itself.

The vibration motor serves to convert input electrical energy into mechanical energy, and is generally referred to as a vibrator.

The physical principle of driving a vibration motor is based on Fleming's left-hand rule that a conductor placed in a magnetic field is subjected to a force, and electric energy is converted into a torque by an electromagnetic field mediation in a gap existing between the stator and the vibrator .

Such vibration motors are widely used in various sizes and applications, and in particular, they are widely used as vibration motors for vibrating call in communication terminals in response to the growth of the information and communication industry. As a typical vibration motor that is being commercialized, It is divided into coin type and cylinder or bar type.

The main principle is to transform electrical energy into mechanical energy by means of a coil and an iron core (magnet) according to Fleming's left-hand rule that a current carrying conductor is in the magnetic field.

That is, when a current signal including several frequencies is applied to a fixed coil, the coil generates mechanical energy by moving a magnetic circuit including a magnet, which is a vibrator, according to the direction of the current, the intensity of the current, and the frequency.

As an example of the conventional technology of the vibration motor, the structure of the vibration motor applied to the Korean Patent Application No. 2006-12517 (electroacoustic transducer) which has been registered and registered as the cause of the vibration motor is exemplified.

The structure of the vibration motor applied to the conventional electroacoustic transducer corresponds to an alternating signal applied to a bidirectional dual-type coil 13 (a pair of spaced-apart coils whose windings are wound in opposite directions) And a vibrating vibrating body 2 (14; magnet).

When the alternating signal is applied to the coil 13 and the poles of the coils 13 at both ends of the coil 13 are formed of SN / NS and the magnetic pole of the vibrating body 2 14 is NS, The repulsive force acts on the N pole of the vibrating body 2 14 contacting the N pole portion of the coil 13 and the S pole of the vibrating body 2 14 contacting the S pole of the coil 13, ) Collide while moving in the other direction, thereby generating a vibration sound.

Conversely, if the magnetic pole of the coil 13 is formed of NSSN and the magnetic pole of the vibrating body 2 14 is NS, the N pole of the vibrating body 2 14 in contact with the N pole of the coil 13, The S pole of the vibrating body 2 (14) in contact with the S-pole portion of the vibrating body 2 (14) acts as a repulsive force, causing the vibrating body 2 (14) to collide while moving to the other side,

However, in the conventional vibration motor, when the current does not flow through the coil 13, the force for restricting the movement of the vibrating body 2 (14) is lost and the vibrating body 2 (14) Which may damage the structure of the vibration motor or cause mechanical abnormal vibration sound due to collision with peripheral components, rather than a normal vibration sound due to electrical characteristics.

For example, when the conventional vibration motor as described above is applied to a mobile device such as a mobile phone, when the user walks with the mobile phone or when the position (height or angle) of the mobile phone is changed, The vibrating noise or the vibrating force may cause an abnormal operation other than a normal operation of the mobile phone or the vibration motor or a confusion that the abnormal operation is mistaken as a normal operation to the user .

In the case of the conventional vibration motor, since the vibrating body 2 14 reciprocates both ends of the bidirectional dual-type coil 13, a vibrating sound or a vibrating force is generated only at a single portion of each end, There is this limited problem.

In order to solve such a problem, in recent years, Korean Patent Publication No. 10-2009-0085977 (horizontal linear vibration motor) has been introduced. This includes a case 200 assembled with each other to form an internal space and a bracket 300; A hollow coil 400 installed in the case 200 or the bracket 300; And a yoke 530 formed to surround the magnet 520 and including the hollow coil 400. The magnetic coil 520 is wound around the hollow coil 400, And a weight 540 mounted on the magnetic part 510. The vibrator 500 includes a vibrator 500, A buffer member 600 provided between the hollow coil 400 and the yoke; And a spring member (700) having one end fixed to the case (200) or the bracket (300) and the other end fixed to the vibrator (500) to elastically support the vibrator (500) to be.

1, the spring member 700 is fixed at one end to the case 200 or the bracket 300, and the other end is fixed to the vibrator 500. However, That is, through the fitting or fixing through the welding, there is a problem that the fixing work of the spring member 700 is very troublesome, so that it is not easy to manufacture by assembling.

In addition, since the above-described prior art has at least three independent components, that is, the case 200 or the bracket 300, the vibrator 500, and the spring member 700, have.

The reference numerals related to the above-mentioned conventional vibration motors are denoted by reference numerals shown in the prior art Patent No. 2006-12517 (Electroacoustic Converter) of the present invention. It is to be noted that, although there may be portions which overlap with the reference numerals of the following reference numerals and the accompanying drawings, they should be regarded as separate codes.

The present invention, which has been made in consideration of the problems of the conventional vibration motor as described above, is characterized in that a magnetic circuit (including a weight) having N poles and S poles responding to an alternating signal flowing to a coil, And a vibration motor in which a spring structure, which is provided with the magnetic circuit (including a weight member) in the case itself, is elastically supported in the motor.

In addition, according to the present invention, a magnetic circuit having N poles and S poles responds to an alternating signal applied to a coil to reciprocate while oscillating (limited left-right rotation) together with reciprocating motion in a vibration, And to provide a vibration motor that generates vibration.

Further, in the present invention, the elastic path of the spring provided to the case in the same manner is pulled and joined to the magnetic circuit portion located at the center of the case without the bent portion, and is normally supported on either side without bias, And to minimize a force of pulling in a direction opposite to a direction in which the motor starts moving.

According to an aspect of the present invention, A vibration inducing unit 120 provided inside the case 110 and flowing an alternating signal inputted from the outside; A vibration reaction means (130) for generating a vibration sound or a vibration force in a linear reciprocating motion in response to the alternating signal of the vibration generating means (120); A spring 140 that is made of the same body as both sides of the case 110 in the vibrating direction and is pulled inwardly or is bent and extended from the surface of the case 110 and supported by the vibration reaction means 130 (100).

The present invention solves the above-mentioned problems by providing a spring 140 having the same shape as that of the case while the both sides of the case 110 are cut through punching, So that the assembly or fixing operation can be omitted. Accordingly, the present invention can greatly simplify the structure and structure of the vibration motor, and simplify and facilitate the assembling work.

In addition, the present invention allows the vibration reaction means (130) to support the vibration reaction means (130) on both sides of the spring (140) so that one side supports the left side and the other side supports the right side, So that a three-dimensional vibrational motion can be obtained.

In addition, according to the present invention, since the spring 140 is formed of the same body as both sides of the case 110 in the vibration direction, it is pulled inward without being bent, and is elastically supported through the joint with the vibration reaction means 130, The vibration reaction means 130 is supported on either side without bias and minimizes the attraction of the pulling force in the direction opposite to the advancing direction at the time of left and right oscillation to prevent the loss of the vibration power .

Further, in the present invention, as described above, the vibration reaction means 130 is normally supported without being tilted so that the spring 140 can be rotated in the non-operating state in which the alternating signal is not applied to the vibration generating means 120 (Abnormal operation) while supporting the vibration reaction means 130 on the free space in the case 110, thereby obtaining the effect of preventing the user from confusing the abnormal operation as a normal operation, It is possible to prevent the damage of the vibration structure or the life shortening factor caused by frequent occurrence of the operation.

Further, according to the present invention, at the portion where the spring 140 contracts, the stopper 150 provides a point of repulsion as well as shrinkage resistance, so that the mechanical vibration force can be added to the electric vibration force to increase the vibration force.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing a configuration of a prior art. Fig.
2 is a perspective view showing an external configuration according to an embodiment of the present invention;
3 is an exploded perspective view showing a detailed configuration according to an embodiment of the present invention.
4 is a cross-sectional view more specifically illustrating a combined configuration according to an embodiment of the present invention;
5 and 6 are top and cross-sectional views illustrating a vibration state according to an embodiment of the present invention;
7 is a perspective view showing the configuration of another embodiment of the present invention.
8 is a perspective view clearly showing a state in which a spring is provided in a case of another embodiment of the present invention.
9 and 10 are top and cross-sectional views showing a vibration state according to another embodiment of the present invention.
FIGS. 11 to 14 are exploded perspective views showing arrangement structures of yokes, magnets, top plates, and coils according to embodiments of the present invention. FIG.

The present invention will now be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2 to 4, the present invention includes a case 110; A vibration inducing unit 120 provided inside the case 110 and flowing an alternating signal inputted from the outside; A vibration reaction means (130) for generating a vibration sound or a vibration force in a linear reciprocating motion in response to the alternating signal of the vibration generating means (120); A spring 140 that is made of the same body as both sides of the case 110 in the vibrating direction and is pulled inwardly or is bent and extended from the surface of the case 110 and supported by the vibration reaction means 130 And the vibration motor 100 may be a vibration motor.

Here, as shown in FIG. 3, the case 110 of the present invention includes a main body 1 (111) formed of a "┛" -shaped plate whose one end is bent upward; And a body 2 (112) coupled to an upper portion of the main body 1 (111), wherein the main body 1 (111) is formed of a plate having a shape of "┗ ┛" ); And a main body 3 (113) which is formed in the shape of a lid having a rectangular housing shape and which is coupled to an upper part of the combined body of the main body 1 (111) and the main body 2 (112) to block the open end.

In this case, the main body 1 (111) and the main body 3 (113) may be provided with protrusions and corresponding grooves on the outer surface of the main body 1 (111) and the main body 3 (113).

At this time, a PCB for electrically connecting the terminal of the coil, which is the vibration inducing means 120, with the terminal terminal of the external terminal through a lead wire may be seated on the bottom surface of the main body 1 (111).

In addition, the spring 140 is pulled out of the upwardly bent side portions of the main body 2 (112) by punching and is pulled in a state without being bent inward, Or may be fixed to both sides of the vibration reaction means 130 by being projected toward the vibration reaction means 130 in a bent state.

The main body 3 (113) has a rectangular housing shape, and one of the four faces forming the height face may have one side corresponding to the upwardly bent face of the body 1 (111) opened.

In the meantime, the vibration inducing means 120 of the present invention may be a ring-shaped coil in which the direction of current flow is reversed according to an AC signal (frequency signal) input from the outside.

At this time, the vibration generating means 120 may be fixed to an upstanding fixture 121 fitted in a hole formed in the bottom surface and the upper surface of the case 110, and the fixture 121 may have a thickness The thin block body may be formed with fitting protrusions at both upper and lower ends of the central portion thereof.

The bottom surface of the case 110 may be the bottom surface of the main body 1 111 and the top surface may be the top surface of the main body 3 113. [

In the present invention, the vibration reaction means 130 includes a yoke 131 formed of a housing; A magnet (not shown) fixed to the yoke 131 and fixed at an interval so as to position the vibration inducing means 120 between the yoke 131 and the height of the yoke 131, 132 and a top plate 133; The yoke 131 is fixed to one side through which the stacked body of the magnet 132 and the top plate 133 is seated and fixed, and the vibration generating means 120 is fixed to the other side And a weight 134 adapted to be positioned on the surface of the substrate.

The yoke 131 functions to prevent leakage of a magnetic field formed between the yoke 131 and the magnet 132. The top plate 133 can perform a function of concentrating magnetic force between the gaps.

At this time, the tips of the springs 140 may be fixed to both sides of the weight 134.

In addition, the weight 134 may have a square-shaped central portion of the block body, or may have a cross-section of the surface on which the spring 140 of the block body is fixed, curved inward. In this case, since the spring 140 provides an inwardly bent space in which the vibration reaction unit 130 is flexed during the shrinking process, the vibration range of the vibration reaction unit 130 is maximized while the spring 140 compresses noise Noise) can be prevented from occurring.

Meanwhile, in the present invention, the spring 140 is formed by punching both side surfaces of the case 110 facing each other in the vibration direction, and one end is connected to the other side May be a leaf spring coupled with the vibration reaction means 130.

In this case, the spring 140 may be a plate spring of "━" or a plate spring of "⊂".

At this time, the spring 140 may be either a curved path or a straight line.

The spring 140 elastically supports both side surfaces in the vibration direction of the vibration reaction means 130, and the other end positioned on the free space is coupled to opposite sides of the vibration reaction means 130 .

The combination of the spring 140 and the vibration reaction means 130 may be a welded connection or may be achieved by a groove mutual coupling of the protrusion on the end of the spring 140 and the vibration reaction means 130.

The spring 140 may be curved so that both side surfaces of the main body 2 112 are cut out and bent in a direction of the vibration reaction means 130, And may have a straight section while bending and protruding in the direction of the vibration reaction means 130 in a state where the cut-out portion is cut.

The present invention may further include a stopper 150 protruding from both sides of the inside of the case 110 in the vibration direction to limit the movement of the spring 140 and to provide a point of repulsion of the spring have.

The stopper 150 includes a body 3 111 and a body 3 111 which are opposite to each other in a direction in which the spring 140 is positioned, Respectively.

At this time, the stopper 150 may be provided at an intermediate portion of the surfaces of the main body 1 (111) and the main body 3 (113), or may be biased to a point where the spring 140 starts.

The operation of the present invention, which can be configured as described above, is as follows.

5, when the upper end of the magnet 132 constituting the vibration reaction means 130 is an N-pole, and the lower end of the magnet 132 is an S-pole in contact with the yoke 131, When the S pole and the N pole are formed at the upper and lower ends of the coil by the alternating signal applied to the coil as the vibration inducing means 120, the N pole of the magnet as the vibration reaction means 130 and the N pole of the vibration generating means 120 The N pole of the coil acts repulsively, the N pole of the coil as the S pole of the magnet, the coil serving as the vibration generating means 120, and the N pole of the magnet and the S pole of the coil as the vibration generating means 120 act on each other, As shown in FIG. 6, the vibration reaction means 130 moves in a direction (right direction in the drawing) approaching the vibration inducing means 120.

If the N pole and the S pole are formed at both ends of the coil by the alternating signal applied to the coil as the vibration inducing means 120, the N pole of the magnet as the vibration reaction means 130 and the N pole of the vibration generating means 120 And the S pole of the coil as the vibration inducing means 120 act repulsively and the N pole of the magnet and the S pole of the coil as the vibration inducing means 120 act as a force, The vibration reaction means 130 moves in a direction away from the vibration inducing means 120 (left direction in the figure).

In this way, the vibration reaction means 130 reacts according to the polarity direction of the alternating signal of the vibration inducing means 120, and a mutual pushing and pulling force acts. While the vibration reaction means 130 linearly reciprocates, Generates vibration power.

According to one embodiment of the spring 140, both side surfaces of the body 2 112 are cut and bent in a direction of the vibration reaction means 130, so that the vibration reaction means 130 are supported without any bias in either one of them, while minimizing the action of pulling force in the direction opposite to the advancing direction at the time of left and right vibration, thereby preventing loss of vibration power.

Particularly, when the spring 140 is pulled in the direction of the vibration reaction means 130 and is bent, the loss of the vibration power is prevented so that the range of the resonance frequency is widened. The range may range from 0 to 1 KHz, In particular, it can have a resonance frequency of 50 Hz to 300 Hz.

At this time, among the springs 140 that support both ends of the vibration reaction means 130, the springs 140 in the direction in which the vibration inducing unit 120 is positioned and the ends of the springs 140 in the other direction According to the example, each of the vibration reaction means 130 is coupled to the opposite side of both ends of the vibration reaction means 130, so that both ends reciprocate in a linear reciprocating motion. In this process, a vibration force and a vibration sound are generated.

In this case, when the vibration reaction means 130 performs the reciprocating motion as described above, the spring 140 is applied to the stopper 150 provided to the body 1 111 and the body 3 113 of the case 110, The stopper 150 generates a resistance force while blocking the movement of the spring 140 to the surface of the case 110 and acts as a point for providing a repulsive force in the opposite direction, And noise generated when the spring 140 including the vibration reaction means 130 collides with the case 110 can be prevented.

Hereinafter, another embodiment of the present invention will be described.

" 형상 또는 "

" 형상으로 이루어지되, 본체1(111)과 본체3(113)의 마주하는 양측 면에 각각 1개가 마련될 수도 있고, 양측 면 각각에 2개가 대칭으로 마련될 수도 있다. 이와 같이 되면, 첨부 도면 도 9 및 도 10에 도시된 바와 같이, 상기 스프링(140)에 의해 지지되는 진동반응수단(130)이, 호 운동 또는 추 운동하지 않는 가운데 일직선의 왕복 운동이 이루어지게 된다.7 and 8, when the spring 140 is in the "

"Shape or"

One of which is provided on each of opposite sides of the body 1 111 and the body 3 113, and two of them may be provided symmetrically on both sides of the body 1 111. In this case, As shown in FIGS. 9 and 10, the vibration reaction means 130 supported by the spring 140 is reciprocated in a straight line without arc motion or weight motion.

11, the yoke 131 constituting the vibration reaction unit 130 is bent in a state in which four sides of the surface on which the magnet 132 is fixed are extended, It may be formed in the shape of a rectangular housing formed. In this case, the yoke 131 can be machined by another machining method other than the method of molding the yoke 131 through injection or press punching.

12, the yoke 131 is formed in a "┗ ┛" shape, and a block body of the same or an integral part of the yoke 131 protrudes from the yoke 131, And the stacked body of the magnet 132 'and the top plate 133' may be seated and fixed on the inner side surfaces of the bent side surfaces of the yoke 131 as shown in FIG. Shaped magnet 132 and a top plate 133 are seated and fixed in an intermediate portion of the yoke 131. Magnets 132 'are formed on the inner surfaces of both bent surfaces of the yoke 131, And the stacked body of the top plate 133 'may be seated and fixed, respectively. As shown in FIG. 14, the yoke 131 may have a "┗" shape, The stacked body of the magnet 132 and the top plate 133 of the stator 100 It may be.

In this case, a magnetic field can be formed on the inside and the outside of the coil, which is the vibration inducing means 120, to improve the vibration output. 12, a coil, which is the vibration inducing means 120, is positioned between the stacked body of the magnet 132 and the top plate 133 on both sides of the yoke 131 and the yoke convex at the center of the yoke 131, The magnet 132 and the top plate 133 in the yoke 131 and the magnet 132 in the center of the yoke 131 and the top plate 133, A coil serving as the vibration inducing means 120 is positioned between the stacked bodies and a magnetic field is formed inside and outside.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

100: Vibration motor 110: Case
111: main body 1 112: main body 2
113: main body 3 120: vibration generating means
130: Vibration reaction means 131: York
132: Magnet 133: Top plate
134: weight 140: spring
150: Stopper

Claims (16)

1. A vibration motor having a structure in which a magnetic circuit that reciprocally moves in response to a coil on both sides of a case is elastically supported,
A case 110;
A vibration inducing unit 120 provided inside the case 110 and flowing an alternating signal inputted from the outside;
A vibration reaction means (130) for generating a vibration sound or a vibration force in a linear reciprocating motion in response to the alternating signal of the vibration generating means (120);
A spring 140 that is one end connected to the case 110 in an identical state and the other end is pulled inward or bent to support the vibration reaction unit 130 by being joined to the vibration reaction unit 130;
The spring 140 protrudes from both side surfaces of the case 110 in the vibration direction to block the movement of the spring 140 to the surface of the case 110, thereby generating a resistance force and providing a repulsive force in the opposite direction A stopper 150 functioning as a point to which the stopper 150 is attached;
And the vibration motor.
2. The apparatus of claim 1, wherein the case (110)
A body 1 (111) formed of a plate having a shape of " ┛ ┛ "whose one end is bent upward;
And a body 2 (112) coupled to an upper portion of the main body 1 (111), wherein the main body 1 (111) is formed of a plate having a shape of "┗ ┛");
A main body 3 (113) made in the shape of a lid in the shape of a rectangular housing and coupled to the upper part of the combined body of the main body 1 (111) and the main body 2 (112) to block the open end;
Wherein the vibration motor comprises:
2. The apparatus according to claim 1, wherein the vibration inducing means (120)
Is fixed to a standing fixture (121) which is inserted into a hole formed in a bottom surface and an upper surface of the case (110) and stands upright.
The apparatus according to claim 1, wherein the vibration reaction means (130)
A yoke 131 made of a housing;
A magnet (not shown) fixed to the yoke 131 and fixed at an interval so as to position the vibration inducing means 120 between the yoke 131 and the height of the yoke 131, 132 and a top plate 133;
The yoke 131 is fixed to one side through which the stacked body of the magnet 132 and the top plate 133 is seated and fixed, and the vibration generating means 120 is fixed to the other side A weight 134 adapted to be positioned in the body;
And a vibration motor for vibrating the vibration motor.
5. The apparatus of claim 4, wherein the weight (134)
Wherein a central portion of the block body is penetrated, or a cross-section of the surface on which the spring (140) is fixed is curved inward in the form of a block body.
2. The apparatus of claim 1, wherein the spring (140)
The other end of the case 110, which is opposite to the vibration direction, is punched out, and one end of the case 110 is connected to the case 110. The other end of the case 110, which is located on the free space, Wherein the spring is a spring.
2. The apparatus of claim 1, wherein the spring (140)
"━" shape or "

"Shape or"

Shaped plate spring, and one on each of opposite side surfaces of the main body 1 (111) and the main body 3 (113) is provided, or two are provided symmetrically on each of both side surfaces.
2. The apparatus of claim 1, wherein the spring (140)
Wherein the path of the stepping motion is a curved path or a straight line.
9. The method of claim 8, wherein the spring (140)
Both side surfaces of the main body 2 112 are cut and bent in the direction of the vibration reaction means 130,
The reason that the spring 140 is linear is that,
And a state in which both side surfaces of the main body 2 (112) are bent and projected in the direction of the vibration reaction means (130) in a state of being cut, and having a straight section.
delete The apparatus according to claim 1, wherein the stopper (150)
Are provided on the face of the upwardly curved face of the body 1 (111) in the direction in which the spring 140 is positioned and on one face of the body 3 (113) opposite to the face formed on the body 1 (111) .
The apparatus according to claim 1, wherein the stopper (150)
Is provided at an inner middle portion of both sides of the case (110) or biased to a point where the spring (140) starts.
The vibration reaction apparatus according to claim 4, wherein the yoke (131) constituting the vibration reaction means (130)
Wherein the magnet (132) is bent in a state in which the four sides of the surface on which the magnet (132) is seated and fixed are formed in a rectangular housing shape having a raised surface.
The motorcycle according to claim 4, wherein the yoke (131)
A magnet body 132 'and a top plate 133' are formed on the inner side surfaces of the bent side surfaces of the yoke 131, Wherein the laminated body of the vibration motor is fixedly seated.
The motorcycle according to claim 4, wherein the yoke (131)
Shaped laminate of the magnet 132 and the top plate 133 is seated and fixed in the intermediate portion of the yoke 131 and the magnets 132 ') And the top plate 133' are seated and fixed, respectively.
The motorcycle according to claim 4, wherein the yoke (131)
Characterized in that the yoke (131) has a "┗ ┛" shape, and a laminated body of a block-shaped magnet (132) and a top plate (133) is seated and fixed at an intermediate portion thereof.

Images