KR100720197B1 - Horizontal Vibration Linear Type Vibration Motor - Google Patents

Abstract

The present invention relates to a horizontal vibration-type linear type vibration motor, and to install a linear reciprocating motion in a horizontal direction in a space formed therein when the lower stator and the upper case are coupled to each other, and the lower stator and the upper case coupled to each other. A reciprocating motion of a mover, which linearly reciprocates in a horizontal direction between a lower stator and the mover, by installing an elastic member providing elastic restoring force to the mover linearly reciprocating between at least one corresponding inner side of the assembly and the mover By installing a plurality of ball bearings to facilitate the movement of the linear movement according to the interaction of the electromagnetic force by the coil and the magnetic force by the permanent magnet to realize the vibration in the horizontal direction by implementing the movement distance of the mover compared to the conventional structure Can be expanded to achieve high vibration It was, it is possible to minimize the mechanical friction to enable a prolonged use without deterioration.

Vibration motor, horizontal vibration, linear, reciprocating motion

Description

Linear type vibration motor vibrated horizontally

1 is a cross-sectional view showing an example of a conventional vertical vibration linear vibration motor

2 is an exploded perspective view according to a first embodiment of a horizontal vibration type linear vibration motor according to the present invention;

3A and 3B are cross-sectional views taken along line A-A 'and B-B' of the horizontal vibration linear vibration motor shown in FIG.

Figure 4 is an exploded perspective view according to a second embodiment of the horizontal vibration linear vibration motor according to the present invention

5A and 5B are cross-sectional views taken along line A-A 'and B-B' of the horizontal vibration linear vibration motor shown in FIG.

<Explanation of symbols for the main parts of the drawings>

10: lower stator 11: stator yoke

12: base portion 13: withdrawal portion

14 ball bearing housing 15, 31 elastic member support

20: upper case 30: mover

32: slide groove 33: weight storage groove

34: permanent magnet receiving groove 40: magnetic force generating means

41: coil 42: permanent magnet

43: lead substrate 50: elastic member

60: ball bearing 70: weight

80: mover yoke

The present invention relates to a horizontal vibration linear vibration motor, and more particularly, to a flat vibration motor mounted on a portable communication device such as a mobile phone to notify an incoming call with silent vibration.

With the rapid development of wireless communication technology, portable communication devices are becoming smaller and lighter, and as the memory capacity increases, portable communication devices equipped with various functions such as multiple harmony, video communication, satellite broadcasting (DMB), MP3, and games have recently been developed. Devices are becoming commonplace. As the size of the device becomes smaller and lighter, parts including device devices, IC chips, and circuits mounted inside portable communication devices need to be evolved in size and shape so as to increase space utilization while becoming highly integrated and highly functional.

Therefore, as a part of this trend, many researches have been conducted on the flat vibration motor mounted inside the portable communication device to notify the user by the silent vibration. In recent years, the flat vibration motor is linked to the MP3, game, etc. There is a need for additional functions that provide live vibration information to the user.

Early models of vibration motors mounted inside portable communication devices were in the form of rotary vibration motors (not shown in the drawing) having stators and rotors as basic configurations. The rotary vibration motor generates vibration by fixing the shaft to the bracket of the stator and supporting the rotor by rotating the rotor on the shaft. In order to improve the vibration force, the vibration volume is increased by increasing the volume of the rotor or increasing the number of rotations. However, due to structural problems, there was a limit to miniaturization, and there were many difficulties in generating high vibration.

In addition, such a rotary vibration motor is composed of a brush and a commutator is soldered and fixed to the stator in order to contact the rotor to supply current to the rotor, because the shaft and the bearing is in direct contact with the rotating brush and commutator or shaft when driving for a long time The wear occurred in the bearings, making it difficult to guarantee a life cycle longer than a certain time, and the intensity of some vibrations could be controlled by adjusting the applied voltage to control the intensity of the vibration, but the feeling of vitality in a communication device having various functions There was a limit to providing a vibration to a user.

Proposed to solve the structural problems of such a rotary vibration motor is a vertical vibration actuator type vertical vibration motor as shown in Patent Publication No. 10-2005-0005596 (2005.01.14) as shown in FIG. .

The vibration motor includes an upper case 110 and a lower case 120 opposed to each other, a magnetic force generating means 130 formed on at least one surface of the upper case and the lower case, and an attraction force opposed to the magnetic force generating means. The magnet 140 to which the repulsive force is applied, the heavy material 150 for weighting the vibration force while forming the body and moving up and down by mounting the magnet, and located at the bottom of at least one of the upper and lower surfaces of the heavy material It comprises an elastic means 160 for elastically supporting the heavy material, and a fixing member 170 for fixing the other end of the elastic means to the upper case and the lower case.

However, in the case of the flat vibration motor, there is a problem in that the elastic means, the vibrating body, and the coil for driving are disposed coaxially in the vertical direction, thereby improving the vibration force. That is, the flat vibration motor has a coin shape having a larger outer diameter than the thickness of the vibration motor. In order to vibrate the vibration body in the vertical direction, the thickness of the coil generating the free space of the elastic body for supporting the vibration body and the electromagnetic force is generated. Since it was necessary to secure the weight of the vibrating body and the vibrating width of the vibrating body substantially related to the generation of the vibrating force, there was a limit in increasing the vibrating force.

Therefore, the present inventors can generate high vibration by improving the structure of the flat vibration motor to generate vibration in the horizontal direction, and there is no deterioration in performance even when used for a long time, multi-chord, video communication, satellite broadcasting (DMB), The research was conducted on a flat vibration motor applicable to high performance portable communication devices equipped with various functions such as MP3 and games.

The present invention has been invented under the above-described aspect, and the structure of the vibration motor is improved to generate vibration in the horizontal direction, so that the moving distance of the mover can be structurally extended compared to the conventional one, and high vibration can be obtained. The aim is to provide a horizontal vibration linear vibration motor that can be used for a long time without degrading performance.

According to an aspect of the present invention for achieving the above object, the horizontal vibration type linear vibration motor according to the present invention is installed in the horizontal reciprocating movement in the horizontal direction on the space formed therein when the lower stator and the upper case is coupled And an elastic member for providing an elastic restoring force to the linear reciprocating mover between at least one corresponding inner side surface of the lower stator and the upper case assembly coupled to each other, and the mover, and the lower stator and the mover. By installing a plurality of ball bearings to smooth the reciprocating movement of the linear reciprocating motion between the horizontal movements, the reciprocating motion of the mover is linearly reciprocated by the interaction of the magnetic force by the coil and the magnetic force by the permanent magnet. It is characterized in that it is generated.

Therefore, the horizontal vibration type linear vibration motor according to the present invention can structurally extend the moving distance of the mover compared to the conventional vibration motor in which vibration is generated in the horizontal direction and vibration is generated in the vertical direction, thereby obtaining high vibration, Since mechanical friction can be minimized, it can be used for a long time without degrading performance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

Figure 2 is an exploded perspective view according to a first embodiment of a horizontal vibration type linear vibration motor according to the present invention, Figures 3a, 3b is a cross-sectional view of the horizontal vibration type linear vibration motor shown in Figure 2, Figure 4 is An exploded perspective view according to a second embodiment of the horizontal vibration linear vibration motor, FIGS. 5A and 5B are cross-sectional views of the horizontal vibration linear vibration motor shown in FIG. 4.

The horizontal vibration linear vibration motor according to the present invention includes a lower stator 10, an upper case 20, a mover 30, a magnetic force generating means 40, an elastic member 50, and a plurality of ball bearings ( 60).

The lower stator 10 and the upper case 20 form an external shape of the vibration motor, and a space is formed therein in correspondence with each other. At this time, the shape of the lower stator 10 and the upper case 20 may be formed in various shapes such as square, rectangular, oval shape having a long axis and a short axis.

The mover 30 is installed in a space formed therein when the lower stator 10 and the upper case 20 are coupled to each other, and linearly reciprocates in the horizontal direction in this space.

The magnetic force generating means 40 includes a coil 41 and a permanent magnet 42, the mover 30 in accordance with the interaction of the electromagnetic force by the coil 41 and the magnetic force by the permanent magnet 42 Drive. At this time, the permanent magnet 42 may be implemented integrally with the mover (30).

The elastic member 50 is installed between at least one corresponding both inner side surfaces of the lower stator 10 and the upper case 20 combined body corresponding to each other and the mover 30, the linear reciprocating motion Provides elastic restoring force for the mover 30.

The ball bearing 60 is installed between the lower stator 10 and the mover 30 to smoothly reciprocate the mover 30 linearly reciprocating in the horizontal direction.

Accordingly, the horizontal vibration linear vibration motor according to the present invention is provided with a mover 30 for linear reciprocating motion in a horizontal direction in a space formed therein when the lower stator 10 and the upper case 20 are coupled to each other. An elastic member that provides elastic restoring force to the mover 30 linearly reciprocating between the mover 30 and at least one or more corresponding inner surfaces of the lower stator 10 and the upper case 20 coupled to each other. And a plurality of ball bearings 60 for smoothing the reciprocating motion of the linear reciprocating motion in the horizontal direction between the lower stator 10 and the mover 30. According to the interaction between the electromagnetic force by the coil 41 and the magnetic force by the permanent magnet 42, the mover 30 is linearly reciprocated to generate vibration in the horizontal direction.

Therefore, the horizontal vibrating linear vibration motor according to the present invention is structurally deformed to linearly move the vibrating body (mover) to vibrate the vibrating body in order to vibrate the vibrating body vertically without increasing the thickness of the portable communication device. Since the space of the elastic body to support the (mover) and the thickness of the coil generating the electromagnetic force had to be secured, the weight of the vibrating body and the vibration width of the vibrating body that were substantially related to the generation of the vibrating force could not be increased. It is possible to solve the disadvantages of the conventional horizontal vibration type vibration motor, which had a limit to increase.

That is, since the horizontal vibration type linear vibration motor according to the present invention generates vibration in the horizontal direction, compared to the conventional vibration motor in which vibration is generated in the vertical direction, the moving distance of the mover can be structurally extended to obtain high vibration. do.

In addition, through a plurality of ball bearings installed on the bottom of the reciprocating movement in the horizontal direction can minimize the mechanical friction can be used for a long time without deterioration of performance.

Meanwhile, the lower stator 10 includes a stator yoke 11 and a base part 12, and the base part 12 is coupled to the stator yoke 11 to form a lower stator 10.

The stator yoke 11 is disposed under the coil 41 of the magnetic force generating means 40 and a lead substrate 43 disposed at the lower part of the coil 41 to apply an electrical signal to the coil. The lead portion 43 which is cut out to draw out the lead substrate 43 installed inside is formed.

On the other hand, the stator yoke 11 is composed of a material having a permeability to form a magnetic path, when using a stator yoke of a high permeability material to form a magnetic path generated by the coil 41 and the permanent magnet 42 at the same time the magnetic force By increasing the magnetic flux that bridges the coil to increase the efficiency of the vibration motor can be improved, the suction force with the permanent magnet 42 installed in the mover 30 generates a suction force during the reciprocating movement of the mover (30) It can be reduced, and the mover 30 can be prevented from escaping from the moving trajectory.

The lead substrate 43 is positioned below the coil 41 to supply external power to the coil. One side of the lead substrate 43 is provided with a terminal for soldering and fixing the coil, and one end of the vibration motor. It is drawn out to the outside and connected with external power. The lead substrate 43 may be made of a flexible flexible substrate or a rigid hard substrate. However, the hard substrate may be applied when the coil is formed using MEMS technology. It is desirable to be.

The base part 12 is coupled to the stator yoke 11, and forms an outline of a lower stator to support the inside of the stator yoke 11 to prevent the stator yoke 11 from being deformed by an external force. . The base portion 12 is formed with a ball bearing receiving portion 14 to accommodate the plurality of ball bearings 60, the ball bearing 60 is seated on the ball bearing receiving portion 14.

The difference between the first embodiment shown in Figs. 2 and 3A and 3B and the second embodiment shown in Figs. 4 and 5A and 5B is that in the case of the first embodiment, the base portion 12 causes the stator yoke to be driven by an external force. Supported from the inside of the stator yoke (11) to prevent deformation of the (11), the base portion 12 is formed to form the outer shape of the lower stator 10, and the elastic member on the base portion 12 The elastic member support part 15 supporting the 40 is formed. In the second embodiment, the base part 12 does not form the outer shape of the lower stator 10, and the stator yoke 11 has an outer shape. The base part 12 is configured to be completely inserted into the stator yoke 11 so as to be formed, and the elastic member support part 15 supporting the elastic member 50 is formed on the stator yoke 11. Is different.

The elastic member support portion 15 may be formed by integrally protruding from the inner wall of the stator yoke 11 or the base portion 12, and in addition to the separation of the elastic member 50 using a groove or an adhesive member, etc. You may.

The upper case 20 is implemented to be fixed to the lower stator 10 by being spaced apart from the mover 30 by a predetermined interval so that the mover 30 is supported by the ball bearing 60 to move without difficulty. By covering the upper portion of the lower stator 10, it is preferable to use a material resistant to deformation so that deformation by external force does not occur.

The mover 30 is horizontally formed by an electromagnetic force by the magnetic force generating means 40 and an elastic restoring force by the elastic member 50 in a space formed therein when the lower stator 10 and the upper case 20 are coupled to each other. Linear reciprocating motion At this time, the elastic member 50 on the side of the mover 30, that is, the surface opposite to at least one corresponding both inner surface of the lower stator 10 and the upper case 20 combined to correspond to each other; It is provided with an elastic member support portion 31 to prevent the separation.

The elastic member support part 31 may be formed by integrally protruding from the outer surface of the mover 30, in addition to the separation of the elastic member 50 by using a groove or an adhesive member.

On the other hand, according to an additional aspect of the present invention, the direction of the elastic restoring force by the elastic member 50 in the ball bearing contact surface of the mover 30 in contact with the ball bearing 60, that is, parallel to the moving direction of the mover 30 It is preferable to implement a linear reciprocating motion in one direction by forming the slide groove 32 in one direction.

In addition, the ball bearing 60 is smoothly rotated by implementing the ball bearing receiving portion 14 of the base portion 12 to be somewhat larger than the moving distance (stroke distance) of the mover 30 in a direction parallel to the moving direction of the mover. It may be possible.

The elastic member 50 is installed between the lower stator 10 and the mover 30 to prevent the mover 30 from colliding with the lower stator 10 and to change the direction of the mover 30. At the same time to facilitate the role of transmitting the vibration generated in the mover 30 to the outside through the lower stator (10).

The elastic member 50 may be made of a leaf spring or a coil spring, it may be formed of an elastic material having a restoring force, such as silicon, and is supported by both the lower stator 10 and the mover 30 and fixed in tension By simultaneously generating a compressive force or a tension force and a compressive force to allow the mover 30 to perform a smooth horizontal reciprocating motion. If the space between the lower stator 10 and the mover 30 is small, it is also possible to install one elastic member to control the reciprocating motion of the mover.

On the other hand, according to an additional aspect of the present invention, the horizontal vibration linear vibration motor according to the present invention may further include a weight body 70 for improving the generation of vibration.

At this time, it is preferable that the mover 30 further includes a weight receiving groove 33 for accommodating the weight 70, and the mover 30 stores the permanent magnet 42. It is preferable to further include a permanent magnet receiving groove 34 for.

In addition, the horizontal vibrating linear vibration motor is installed on the permanent magnet 42, which is accommodated in the permanent magnet receiving groove 34, it is implemented to further include a mover yoke (80) having a permeability to form a magnetic path. desirable.

The weight body 70 may be formed by integrally molding the permanent magnet 42, the mover yoke 80, and the like, including an injection resin containing powder of a metal material such as tungsten having a high specific gravity. The shortcomings may be formed to be integrally formed with additives or low specific gravity resins in the mover 30.

The weight body 70 is for improving the vibration during the horizontal reciprocating motion of the mover 30, it is to form a large volume of the weight body 70 so as not to reduce the vibration force even if mounted on the portable communication device desirable.

The permanent magnet 42 is preferably disposed on the lower surface of the mover (30) directly facing the coil (41).

The mover yoke 80 is arranged to overlap the upper surface of the permanent magnet 42 to reduce the magnetic resistance of the magnetic flux generated in the permanent magnet 42 to improve the driving force of the mover 30.

The horizontal vibration operation of the mover 30 of the horizontal vibration linear vibration motor according to the present invention having the above-described configuration will be described.

The magnetic force generating means 40 for driving the mover 30 and horizontal vibration is applied to the VCM (Voice Coil Motor) method using the coil 41 and the permanent magnet 42, the inner surface of the lower stator 10 Interaction between the disposed coil 41 and the permanent magnet 42 disposed on the bottom surface of the mover 30 generates a driving force to move the mover 30 horizontally. In detail, the permanent magnet 42 disposed on the mover 30 to supply magnetic force forms a magnetic field in a predetermined region including the coil 41 and applies a current to the coil 41 disposed in the magnetic field. The force (Rorentz Force) is generated in the direction perpendicular to the direction of the magnetic field and the direction of the current. However, since the coil 41 is fixed to the lower stator 10, the mover 30, which is relatively movable, is horizontally moved, and the direction of the force generated by changing the direction of the current applied to the coil 41. By changing the reverse direction, the moving direction of the mover 30 is changed.

Therefore, the frequency of the horizontal reciprocating motion of the mover 30 is determined by applying the current having the opposite direction of the current to the coil 41 at regular intervals, and by the elastic modulus of the elastic member 50 and the frequency of the current. Since the vibration frequency is determined, it is possible to adjust the strength of the vibration of the mover 30 by adjusting the frequency of the current applied to the coil 41.

On the other hand, unlike shown in the drawings, the position of the coil and the permanent magnet constituting the magnetic force generating means to place the permanent magnet on the lower stator, the coil and the substrate on the mover may be implemented to generate a driving force. For example, an ultrasonic motor (Piezo) using a piezoelectric element may be used as the magnetic force generating means.

Therefore, by the above it is possible to achieve the object of the horizontal vibration linear vibration motor according to the present invention presented above.

The horizontal vibration linear vibration motor according to the present invention as described above improves the structure of the vibration motor so as to generate vibration in the horizontal direction, so that the moving distance of the mover can be structurally extended, and high vibration can be obtained. As a result, mechanical friction can be minimized to have a useful effect that can be used for a long time without degrading performance.

While the invention has been described with reference to the preferred embodiments, which are referred to by the accompanying drawings, it is apparent that various modifications are possible without departing from the scope of the invention within the scope covered by the following claims from this description. .

Claims (8)

A lower stator and an upper case forming an external shape of the vibration motor, and having a space formed therein in correspondence with each other; A mover installed in a space formed therein when the lower stator and the upper case are coupled to each other and linearly reciprocating in a horizontal direction in the space; Magnetic force generating means including a coil and a permanent magnet, said magnetic force generating means driving said mover in accordance with the interaction of the electromagnetic force by said coil and the magnetic force by said permanent magnet; An elastic member installed between at least one corresponding inner side surfaces of the lower stator and the upper case assembly coupled to each other and the mover to provide elastic restoring force to the linear reciprocating mover; A plurality of ball bearings installed between the lower stator and the mover to smooth the reciprocation of the mover linearly reciprocating in the horizontal direction; Horizontal vibration type linear vibration motor, characterized in that it comprises a. The method of claim 1, And a slide groove formed in a direction parallel to the direction of elastic restoring force by the elastic member on the ball bearing contact surface of the mover in contact with the ball bearing, so that a linear reciprocating motion occurs in one axis direction. The method of claim 2, The horizontal vibration linear vibration motor further comprises a weight body for improving the generation of vibration, the horizontal vibration linear vibration type vibration motor, characterized in that the mover includes a weight receiving groove for receiving the weight body. The method according to claim 1 or 2, The horizontal vibration linear vibration motor, characterized in that the mover includes a permanent magnet receiving groove for receiving the permanent magnet. The method of claim 4, wherein The lower stator is: A stator yoke disposed below the coil and the coil, the stator yoke having a magnetic permeability to form a magnetic path, the lead substrate being provided to apply an electrical signal to the coil; A base portion coupled to the stator yoke to form an outer portion of a lower stator, the ball bearing receiving portion having a plurality of ball bearings formed therein; Horizontal vibration type linear vibration motor comprising a. The method of claim 5, A mover yoke having the permeability of the horizontal vibrating linear vibration motor installed on the upper surface of the permanent magnet accommodated in the permanent magnet accommodating groove to form a magnetic path; Horizontal vibration type linear vibration motor further comprising. The method of claim 5, Horizontal vibration type linear type vibration motor, characterized in that the stator yoke is formed with an elastic member support for supporting the elastic member. The method of claim 5, Horizontal vibration type linear type vibration motor, characterized in that the elastic member support for supporting the elastic member is formed in the base portion.

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