KR20130001426A - The linear vibrating motor - Google Patents

Abstract

PURPOSE: A linear vibrating motor is provided to prevent an abnormal operation from being misrecognized as a normal operation by preventing the movement of a vibration reaction unit in a non-operation state of a vibration generating unit. CONSTITUTION: A case(11) is composed of an enclosure(11a) and a cover(11b). A vibration generating unit is prepared at both ends in the enclosure. A linear vibration motor reciprocates a vibration reaction unit in a linear direction by reacting to an alternating signal of the vibration generating unit. A guider(14) supports the vibration reaction unit for the case. The guider prevents the separation of the vibration reaction unit in a limited reciprocating section. The guider generates an independent vibration sound or a vibration power through a direction change and an impact at both ends of the limited reciprocating section.

Description

Linear Vibration Motors {THE LINEAR VIBRATING MOTOR}

The present invention relates to a linear vibration motor, and more particularly, to a linear vibration motor in which a magnet having an N pole and an S pole responds to a vibration, in particular, a linear reciprocating motion to generate a vibration force according to an alternating signal applied to a coil. will be.

The linear vibration motor converts input electrical energy into mechanical energy and is also generally called a vibrator.

The physical principle of driving a linear vibration motor is based on Fleming's left-hand law, in which the conductors in a magnetic field are subjected to force, and the electrical energy is converted into torque by the mediation of the electromagnetic field in the air gap between the stator and the vibrator. do.

Such linear vibration motors are widely used in various fields depending on their size and their use. In particular, the linear vibration motors are also widely used as vibration motors for vibration calls of communication terminals in response to the growth of the information and communication industry.

Its main principle is to convert electrical energy into mechanical energy by coils and iron cores, according to Fleming's left-handed law, that currents are forced when a current-carrying conductor is in a 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 vibrator, for example, a magnet, according to the direction of the current, the strength of the current, and the magnitude of the frequency.

Looking at the prior art of such a linear vibration motor, conventionally, the linear motion vibration motor has a coil spaced in the outer circumferential direction or the inner circumferential direction of the magnet and the top plate which are laminated and fixed by welding or bonding or fitting to the yoke and the upper surface of the yoke in order. Position), magnetic circuits including magnets and top plates (including yokes or heavy bodies, depending on the function and design) are vibrated in response to the magnetic fluxes formed in the air gaps in the direction of the alternating current signal applied to the coil. Generate power.

At this time, the magnet and the top plate are divided into magnetic circuits, and the coil is divided into vibration inducing units.

The sensory signal output device of such a structure is usually made of a coin type, it is to be fixed to the case while a separate leaf spring supports the yoke, the magnet and the top plate is seated.

However, the coin-type sensory signal output device supported by the conventional leaf spring has a problem that the output according to the signal input, that is, the reaction speed is slow. In other words, when a signal is input, the yoke including the magnet and the top plate starts to vibrate, but the response speed is improved compared to the rotary vibration motor, but the structure is supported by the leaf spring. The problem was not completely solved.

In addition, in the case of the conventional linear vibration motor, since the magnet responds to the signal applied to the coil simply by vibrating, that is, vibrates only by electromagnetic action, the vibration force is improved without increasing the current or magnetic force to increase the electromagnetic force. It was a limited structure.

In addition, in the case of the conventional linear vibration motor, when a current does not flow through the coil, the force restraining the movement of the vibrating body is lost, the movement is generated by the self-weight of the vibrating body, thereby damaging the structure of the vibration motor , There is a problem that the mechanical abnormal vibration sound is generated by the collision with the surrounding components rather than the normal vibration sound due to the 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 the position (height or angle) of the mobile phone is changed, the vibrating body moves to a low position due to its own weight. The vibration sound or vibration force is generated, and the vibration sound or vibration force is an abnormal operation instead of the normal operation of the mobile phone or the vibration motor, or such an abnormal operation causes a user to be confused as a normal operation.

The present invention created in consideration of the problems or requirements of the conventional vibration motor as described above prevents the vibration reaction means from flowing (abnormal operation) by its own weight in a non-operation state in which the vibration inducing means does not operate, and the vibration reaction means Guided by the straight guide path, the linear motion is performed, the vibration sound or vibration force is generated in a plurality of parts on the linear structure reciprocating linearly, and multiple angles and colorful vibration sound or vibration force are generated in one vibration cycle During the linear reciprocating motion, the acceleration and the momentum are increased at both ends of the linear reciprocating motion by stress due to the contraction / expansion of the spring. The aim is to provide a linear vibration motor.

The present invention for achieving the above object, in response to the alternating signal of the vibration inducing means 12 provided at both ends of the housing 11a of the case 11 consisting of the housing 11a and the cover 11b, In a vibration motor in which the vibration reaction means 13 generates vibration sound or vibration force while linearly reciprocating, the vibration reaction means 13 is guided on a limited reciprocating section while supporting the case 11 against the vibration reaction means. A guider which prevents the deviation from the vibration path in the direction other than the vibration path, and generates an independent vibration sound or vibration force separate from the vibration reaction means 13 through collision and direction change at both ends of the limited reciprocating section. 14); Stress generating means (17) for supporting the vibration reaction means (13) eccentrically with respect to the housing (11a) to generate stress due to contraction / expansion during the reciprocating motion of the vibration reaction means (13); It is characterized by.

The present invention by the above-mentioned problem solving means is to prevent the vibration reaction means flow (self-abnormal operation) by the self-weight in the non-operation state in which the vibration inducing means does not confuse the user to mistake the abnormal operation to the normal operation It is effective to prevent the damage, the frequent occurrence of such abnormal operation is obtained the effect of preventing damage to the vibration structure or generation of shortening factors.

In addition, the present invention achieves the effect that the vibration reaction means is guided by a straight guide path, so that the linear motion is obtained to obtain a stable and constant vibration characteristics.

In addition, the present invention is to generate a vibration sound or vibration force in a plurality of parts on a linear structure for linear reciprocating motion, the vibration sound or vibration force is generated in a plurality of parts to increase the output or to obtain a colorful vibration sound or vibration force Get the effect.

In addition, the present invention obtains the effect of obtaining a three-dimensional vibration sound or vibration force in one vibration cycle by generating a multi-angle and a variety of vibration sound or vibration force in one vibration cycle.

In addition, the present invention is a straight line through the stress due to the contraction / expansion (return) of the spring during the reciprocation of the vibration reaction means in the state in which the spring eccentrically supported the vibration reaction means against the housing of the case during the linear reciprocating motion By increasing the acceleration and the momentum at both ends of the reciprocating motion, the effect of increasing the vibration force relative to the same input signal (signal magnitude) is obtained.

1 is a perspective view showing an appearance configuration according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing in more detail the detailed configuration according to an embodiment of the present invention.
3 is a cross-sectional view showing in more detail the combined configuration according to an embodiment of the present invention.
Figure 4 is a plan sectional view showing a configuration according to an embodiment of the present invention from another angle.
5 is a partial cross-sectional perspective view showing the configuration of the main part of the configuration according to an embodiment of the present invention.
6 to 8 are sectional views showing the operating state of the present invention.
9 and 10 are a perspective view and a cross-sectional view showing another example according to an embodiment of the present invention.

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

First, look at the configuration of the present invention.

The present invention, as shown in the accompanying drawings, Figures 1 to 4, alternating vibration vibrating means (12) provided at both ends of the housing (11a) of the case (11) consisting of the housing (11a) and the cover (11b) In a linear vibration motor in which the vibration reaction means 13 generates vibration sound or vibration force while linearly reciprocating in response to a signal, the vibration reaction means 13 is supported on the case 11 on a limited reciprocating section. By guiding, the vibration reaction means 13 is prevented from escaping in a direction other than the vibration path, while collision and direction change are made at both ends of the limited reciprocating section, so that the vibration reaction means 13 independently of the vibration reaction means 13 A guider 14 for generating power; Stress generating means (17) for supporting the vibration reaction means (13) eccentrically with respect to the housing (11a) to generate stress due to contraction / expansion during the reciprocating motion of the vibration reaction means (13); It may be.

Here, the enclosure 11a constituting the case 11 in the present invention is an upper open case body having a space therein, and may be a polygon including a quadrangle or a circle (including an ellipse having a short axis short axis).

In addition, a mounting member for seating and fixing the printed circuit board P provided with a terminal for connecting the terminal of the coil, which is the vibration inducing means 12, to the outside may be integrally provided at one outer side of the enclosure 11a.

In addition, the cover 11b constituting the case 11 is a blocking plate formed in a shape corresponding to the housing 11a, and may be fixed or snap-coupled with the housing 11a through a curling coupling.

On the other hand, in the present invention, the vibration inducing means 12 may be a bidirectional dual coil in which the polarities of both ends are alternately reversed according to an AC signal input thereto.

In this case, the coils of the vibration inducing means 12 are a pair of coils formed in opposite winding directions are provided on opposite sides of the housing 11a, respectively, and may have opposite electromagnetic polarities according to alternating signals. have.

On the other hand, the vibration reaction means 13 of the present invention may be a magnet of opposite polarities of both ends, a yoke may be coupled to both ends to prevent the leakage of the magnetic field, a tower made of a magnetic material to concentrate the magnetic force at both ends The plate may be further coupled.

In addition, an elastic member 13a may be further provided at both ends of the vibration reaction means 13 to mitigate an impact upon the collision with the enclosure 11a.

In this case, the elastic member 13a may be a rubber material having a high modulus of elasticity, may be a leaf spring, or may be a coil spring.

On the other hand, the guider 14 of the present invention is a guide path (15) provided in parallel in the linear reciprocating direction in the center portion of the inner surface of the cover (11b) constituting the case (11); Rivet coupled to one side of the vibration reaction means 13, the guide 16 is inserted into the guide path 15, guide; may be configured to include.

In this case, the guide path 15 may be a rail having a “┛┗” shape in which a portion of the center portion of the cover 11b is bent in the opposite direction through punching.

In addition, the guide 16 may be a guide plate body that both ends are bent in a "┏ ┓" shape is inserted into the guide path (15) and slide.

The lubrication member 16a may be further fixedly provided at a portion of the guide 16 that contacts the guide path 15 to minimize friction during the slide.

In the above, the bent both ends of the guide 16 is preferably at least the same height as the portion cut through the punching of the guide path 15. Only then, the guide 16 is prevented from being released in the process of sliding along the guide path 15, the collision surface of the guide 16 can be provided to obtain a vibration sound or vibration force. Of course, after inserting the guide 16 into the guide path 15, both ends of the guide path 15 may be bent to provide a collision surface while limiting the range of linear reciprocating motion.

In addition, the lubrication member (16a) in the above may be a "-" shaped pad having a low friction coefficient due to the smooth surface, a lubricant such as grease may be applied.

Here, the linear reciprocating motion of the guide 16 with respect to the guide path 15, that is, the moving distance, may be the same as the distance that the vibration reaction means 13 linearly reciprocates in the housing 11a, that is, the moved distance. Only then, the vibration reaction means 13 collides against the housing 11a while linearly reciprocating to generate a vibration sound or vibration force, and the guide 16 is linearly reciprocating with respect to both ends of the guide path 15. Generating vibration sound or vibration force while colliding may be performed at the same time to provide a multi-faceted output.

On the other hand, the stress generating means 17 of the present invention, as shown in Figure 5, one side end in one direction in the middle of the inner bottom surface of the housing 11a corresponding to the middle portion of the linear reciprocating motion section This eccentrically positioned, the other end may be a ballistic body such as a leaf spring or iron core spring is riveted to the middle portion of the bottom surface of the vibration reaction means (13).

At this time, the stress of the stress generating means 17 is the other end of the linear reciprocating section in the other side by the linear reciprocating motion of the vibration reaction means 13 on the other end centered on one end eccentrically positioned in the enclosure (11a) In the process of moving in the direction to the middle portion may be the repulsive force generated when it contracts and expands from the portion beyond the middle.

In addition, one end of the stress generating means 17, which is located eccentrically on the inner bottom surface middle portion of the housing 11a, may be rotatably fitted to the eccentric protrusion 17a, and may be riveted in consideration of the stability of the fixing. Can be screwed together.

In addition, the other end of the stress generating means 17 may be riveted through the rivet pin 18 through the guide 16 and the vibration reaction means 13 constituting the guider 14, rivets, The combined part may be in a rotatable state.

In addition, the middle portion of the stress generating means 17 may be bent upward so that the other end portion coupled to the vibration reaction means 13 is positioned higher than the one end portion eccentrically positioned with respect to the housing 11a. . Then, the portion protruding while being riveted to the bottom of the vibration reaction means 13 can linearly reciprocate without friction (interference) with the inner bottom of the enclosure 11a.

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

First, the present invention will be described on the basis of the state in which the left end portion of the magnet of the vibration reaction means 13, the N pole, the right end portion is made of the S pole, as shown in Figs. do.

In this state, as shown in FIG. 6, an alternating signal is applied to the bidirectional dual coil, which is the vibration inducing means 12, so that N is provided at both ends of the left side coil (hereinafter, the first coil) of the bidirectional dual coils. When the pole and the S pole are formed, and the S pole and the N pole are formed at both ends of the right coil (hereinafter referred to as the second coil) of the bidirectional dual coils, the left end of the N pole of the magnet which is the vibration reaction means 13 The repulsive force acts on the N pole of the one coil, and the S pole of the first coil acts as an attractive force and pushes to the right side in the S pole direction of the first coil. In addition, the right end of the S pole of the magnet as the vibration reaction means 13 acts repulsively with the S pole of the second coil, and attracts the N pole of the second coil to the right of the N pole direction of the second coil. Will be pulled.

In this case, while the pushing and pulling force is applied at both ends of the vibration reaction means 13, the vibration reaction means 13 moves to the right to generate vibration sound and vibration force.

At this time, the guide 16 constituting the guider 14 restricting while guiding the linear reciprocating motion of the vibration reaction means 13 is moved to the right side of the guide path 15, the right end of the guide path 15 Colliding with each other, the movement is limited and at the same time generates vibration sound and vibration force.

Therefore, the vibration sound or vibration force of the vibration reaction means 13 together with the vibration sound or vibration force of the guide 16 can be expected to increase the vibration force, and various vibration sounds or vibration forces can be obtained.

The upper part of the guide 16 is bent at the end of the guide portion 15, the upper end portion of which is cut through the punching of the guide path 15 (perforated upper surface of the cover 11b) at least It is preferable that the height is the same, because the guide 16 is prevented from being separated during the slide along the guide path 15, and the collision surface of the guide 16 can be provided to obtain a vibration sound or vibration force. Because it can.

In addition, the linear reciprocating motion of the guide 16 with respect to the guide path 15, i.e., the moving distance, is preferably the same as the distance that the vibration reaction means 13 linearly reciprocates in the housing 11a. The reason is that the vibration reaction means 13 generates a vibration sound or vibration force while colliding against the enclosure 11a while linearly reciprocating, and both ends of the guide path 15 while the guide 16 linearly reciprocates. This is because the operation of generating the vibration sound or the vibration force while colliding with each other can be performed at the same time, thereby providing various outputs.

On the other hand, contrary to the above-described operation, as shown in the accompanying drawings, an alternating signal is applied to the bidirectional dual coil, which is the vibration inducing means 12, so that the S poles at both ends of the first coil of the bidirectional dual coils. And an N pole are formed, and when the N pole and the S pole are formed at both ends of the second coil among the bidirectional dual coils, the left end of the N pole of the magnet as the vibration reaction means 13 is the N pole of the first coil and the repulsive force. And the attraction force with the S pole of the first coil is pulled to the left side in the S pole direction of the first coil. In addition, the right end of the S pole of the magnet, which is the vibration reaction means 13, repulsively acts on the S pole of the second coil, and attracts the N pole of the second coil to be pushed toward the N pole direction of the second coil. .

In this case, while the pushing and pulling force is applied at both ends of the vibration reaction means 13, the vibration reaction means 13 is moved to the left, in which case the enclosure corresponding to the middle portion of the linear reciprocating motion section ( One end is eccentrically positioned in one direction in the middle portion of the inner bottom surface of 11a), and the other end is contracted by the stress generating means 17 riveted to the bottom portion of the vibration reaction means 13.

The reason why the shrinkage of the stress generating means 17 occurs is that one end of the eccentric position on the bottom surface of the housing 11a is not changed in position, and the other end of the vibration reaction means 13 moves linearly. This is because the shape is deformed to correspond to the narrower width as the other end closer to the one end where the other end fixed to the vibration reaction means 13 is located close to the eccentric position is fixed.

As described above, in the process of moving from one side direction to the other direction of the linear reciprocating motion section of the vibration reaction means 13, it contracts to the middle portion and expands from the portion beyond the middle by the original recovery force of the stress generating means 17. While a strong repulsive force acts, the vibration reaction means 13 is pushed in the state in which the acceleration is applied in the other direction and the state in which the kinetic force is increased to impinge on the enclosure 11a, thereby increasing the vibration sound and vibration force. .

At this time, the guide 16 constituting the guider 14 restricting while guiding the linear reciprocating motion of the vibration reaction means 13 is moved to the left side of the guide path 15, the left end of the guide path 15 Colliding with each other, the movement is limited and at the same time generates vibration sound and vibration force.

Therefore, also in this case, the vibration sound or vibration force of the vibration reaction means 13 together with the vibration sound or vibration force of the guide 16 can be expected to increase the vibration force, and various vibration sounds or vibration forces can be obtained. .

The present invention generates a vibration sound or vibration force as the above-described operation is repeatedly performed according to the alternating signal applied to the vibration inducing means 12 as described above, in this case, the alternating signal to the vibration inducing means 12 In the non-operating state where the magnet is not applied, the magnet, which is the vibration reaction means 13, flows freely without being restrained. The freer, ie, the movement in the direction other than the linear reciprocating direction, is guided by the guider 14. Is prevented, and the stress generating means 17 is positioned in any one of the directions in which the vibration reaction means 13 is linearly reciprocated through the expansion elastic force, thereby entirely blocking the generation of vibration sound or vibration force due to flow. By minimizing or preventing the user from confusing the abnormal operation related to vibration to the normal operation.

In addition, by the frequent occurrence of the abnormal operation as described above to prevent the occurrence of damage or shortening the life of the vibration structure to extend the life of the linear vibration motor (10).

In addition, the present invention is to generate a vibration sound or vibration force in a plurality of portions, that is, the vibration reaction means 13 portion and the guide 16 portion in a straight structure that linearly reciprocates, whereby the vibration sound or vibration force is generated in various parts In addition, it is possible to increase the output or to obtain various vibration sounds or vibration forces.

In addition, the present invention achieves the effect that the vibration reaction means is guided by a straight guide path, so that the linear motion is obtained to obtain a stable and constant vibration characteristics.

Looking at another example of the present invention as described above, as shown in Figures 9 and 10, the uneven portion (15a) is formed in the distal end portion of the guide path (15) constituting the guide path (14) , The protrusions 16b may be formed in the guide 16 in contact with the unevenness 15a.

In this case, in the process of linearly reciprocating the guide 16, the protrusion 16b of the guide 16 continuously collides with the unevenness 15a of the guide path 15 to generate vibration.

At this time, such vibration occurs according to the number of the unevenness 15a. For example, if the number of the unevenness 15a is 10, 20 vibrations are generated in the process of linear reciprocating motion once.

Of course, at this time, the vibration force depends on the depth of the unevenness (15a).

According to the present invention as described above, by generating multiple angles and various vibration sounds or vibration forces in one vibration cycle, it is possible to obtain three-dimensional vibration sounds or vibration forces in one vibration cycle.

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.

10: linear vibration motor 11: case
11a: enclosure 11b: cover
12: vibration inducing means 13: vibration reaction means
13a: elastic member 14: guider
15: guide path 15a: irregularities
16: guide 16a: lubricating member
16b: protrusion 17: stress generating means
17a: eccentric protrusion

Claims (11)

In response to the alternating signals of the vibration inducing means 12 provided at both ends of the housing 11a among the cases 11 including the housing 11a and the cover 11b, the vibration reaction means 13 linearly reciprocates. In the linear vibration motor for generating vibration sound or vibration force,
The vibration reaction means 13 is guided on the limited reciprocating section while supporting the case 11 to prevent the vibration reaction means 13 from escaping in a direction other than the vibration path, while at both ends of the limited reciprocating section. A guider 14 for generating an independent vibration sound or vibration force separate from the vibration reaction means 13 through collision and redirection; And a stress generating means (17) for eccentrically supporting the vibration reaction means (13) with respect to the housing (11a) to generate stresses due to contraction / expansion during the reciprocating motion of the vibration reaction means (13). Linear vibration motor. The method of claim 1,
The vibration inducing means 12 is a bidirectional dual coil in which both ends of the polarity are alternately reversed according to an input AC signal, and a pair of coils having opposite winding directions are provided on opposite sides of the housing 11a, respectively. The vibration reaction means (13) is a magnet having opposite polarities at both ends, and a linear vibration motor, characterized in that an elastic member (13a) is further provided at both ends to mitigate a collision with the housing (11a). The method of claim 1,
The guider 14 may include: a guide path 15 provided in parallel in a linear reciprocating direction at a central portion of an inner surface of the cover 11b constituting the case 11; And a guide (16) that is riveted to one side of the vibration reaction means (13) and fitted into the guide path (15). The method of claim 3,
The guide path (15) is a linear vibration motor, characterized in that the portion of the central portion of the cover (11b) is a rail of the "┛┗" shape bent in the opposite direction through the punching. The method of claim 3,
The guide 16 is a linear vibration motor, characterized in that the guide plate body is bent in the "이 ┏" shape is inserted into the guide path (15) slide. The method of claim 3,
The linear reciprocating distance of the guide 16 with respect to the guide path 15 is the same as the distance that the vibration reaction means 13 linearly reciprocates in the housing 11a. The method of claim 1,
The stress generating means 17 has one end eccentrically positioned in one direction from the middle of the inner bottom surface of the housing 11a corresponding to the middle part of the linear reciprocating motion section, and the other end is the bottom surface of the vibration reaction means 13. Linear vibration motor, characterized in that the cartilage is riveted to the middle portion. The method of claim 1,
Linear vibration motor, characterized in that one side end of the stress generating means (17a) eccentrically positioned in the middle of the inner bottom surface of the housing (11a) is rotatably fitted to the eccentric protrusion (17a). The method of claim 1,
Linear vibration motor, characterized in that the other end of the stress generating means 17 is penetrated by rivets through the rivet pin 18 penetrating the guide 16 and the vibration reaction means 13 constituting the guider 14 . The method of claim 1,
The stress generating means 17 is a linear portion characterized in that the middle portion is bent upward so that the other end portion coupled to the vibration reaction means 13 is higher than the one end portion eccentrically positioned with respect to the housing (11a) Vibration motor. The method according to claim 5 or 6,
The concave-convex portion 15a is formed at the distal end portion of the guide path 15 constituting the guider 14, and the protrusion 16b is formed on the guide 16 in contact with the concave-convex portion 15a. Linear vibration motor.

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