KR101101330B1 - Lenear vibration device - Google Patents

Abstract

PURPOSE: A linear vibration device is provided to improve productivity and durability by managing only one side gap between a coil and a magnet and semi-permanently preserve the lifespan of a vibration motor by not using a brush and a commutator. CONSTITUTION: A bottom plate(22) is combined in order to concentrate the magnetic direction of the magnet to one side direction. A top plate(24) is combined in order to concentrate the magnetic direction of the magnet to one side direction. A vibrator is composed in order to enhance sensory vibration and is combined with the top plate. An elastic member(31) is combined with the upper surface of the top plate and is composed in order to help the movement of a vibrating body. A case(32) is combined with the elastic member and transfers vibrating sound to outside.

Description

Linear vibration device {Lenear vibration device}

The present invention relates to a vibration device, a vibration linear device designed to generate vibrations in an electronic device such as a mobile phone while changing the size and vibration by operating the vibration body including a weight body up and down according to the electrical signal of a specific frequency input to the outside It is about.

In general, a mobile phone has a lot of bells or melodies to inform you of the incoming status, but it generates noise around you and may cause discomfort to others. To solve this problem, the vibration motor is designed to notify you of the incoming status by vibration instead of sound. In this vibration motor, it is common to use a vibrating body attached to a general DC motor using a brush. This causes a limitation in life by using a brush and a limitation in using various vibration modes. Responsive vibration motors are required to meet consumer needs.

In order to solve this problem, there are "vertical oscillator" registered as patent 10-0735299, which is a vibration device which operates up and down without using a brush, and "lined dynamic motor" which is registered as 10-0934584, but a linear vibration device composed of such a structure As the coil must move up and down between the magnet and the yoke, sufficient gaps are secured, and there is continuous up and down without limit by the mutual force between the coil and the magnet, which causes mechanical contact with other components. Due to this, there is a high possibility of noise noise and dampers and magnetic fluids are used. However, this is caused by deterioration in productivity and progression characteristics, and it is difficult to secure sufficient product reliability due to low productivity.

The present invention relates to a linear vibration device designed to solve this problem, and configured to change the magnitude and vibration in accordance with an electrical signal of a specific frequency input to the outside while stopping magnetically so as not to move any more during up and down operation. The present invention relates to a vibration linear device that maximizes productivity by maintaining only one GAP while greatly improving touch noise in such a manner as to be designed.

Accordingly, the present invention is to solve the structural problems according to the conventional vibration motor as described above, and to remove the brushes and commutator to save the life semi-permanently.

In addition, another object of the present invention is to ensure product reliability while maintaining only one side of the GAP between the coil and the magnet during the vertical operation, and to stop mechanically by stopping the magnetic circuit so that the vertical movement does not move any more. The purpose of the present invention is to realize touch noise, magnetically stable operation and fast response speed.

In order to achieve the above object, the linear vibration device of the present invention is coupled to a bracket having an extension piece with one side protruding and a PCB for transmitting an external electrical signal to the coil is coupled to the coil on its upper surface. In combination, it forms a stator composed of a yoke designed to generate electromagnetic force by an external electrical signal and maximize the generated electromagnetic force in one direction.

In addition, it consists of a permanent magnet configured to form a magnetic field corresponding to the electromagnetic force of the yoke formed by the coil, and an upper plate and a lower plate configured to concentrate the magnetic force of the permanent magnet in one direction, and operate up and down in response to the concentrated electromagnetic force of the yoke. It forms a vibrating body by combining with a vibrator designed to increase the sensation vibration in this vertical motion.

In addition, the elastic member is coupled to the vibrating body to send the vibration sound to the outside, and then fixed to the inner surface in the case of the cover empty inside, and then combined with a bracket with an extension piece protruding one side edge to complete the linear vibration device combined do.

The linear vibration device according to the present invention having such a structure is composed of a magnet generating a magnetic field and an upper plate and a lower plate formed to concentrate the magnetic force of the magnet in one direction, and the electromagnetic force, attraction force and repulsive force of the yoke concentrated in accordance with the electrical signal in the coil. By virtue of operating vertically and vertically by the vibration sound is transmitted to the outside through the cover is hollow inside the elastic member can vibrate the electronic device and the like.

In addition, the vertical movement is stable by restricting the vertical movement in accordance with the magnetic force of the yoke and the magnetic force of the upper plate and the lower plate to ensure a sufficient gap so as not to touch the upper and lower sides, and between the coil and the magnet during the vertical movement. By only managing one side of the GAP, productivity and durability can be improved.

The linear vibration device according to the present invention has the advantage that the life of the vibration motor can be semi-permanently preserved by not using a brush and a commutator applied to the existing vibration motor, and the vertical vibration device has a vertical operation. It is designed to increase product reliability by greatly improving productivity and durability by managing only one GAP between coil and magnet while allowing stable implementation by allowing magnetic stop.

1 is an exploded view of a linear vibration device according to the invention.
2 is a cross-sectional view of a linear vibration device according to the invention.
3 is a cross-sectional view of a conventional linen copper motor
4 shows an improved cross-sectional view of a conventional linear vibration device.
5 is a cross-sectional view showing the configuration of a magnetic field according to the present invention.
Figure 6 is a cross-sectional view showing a lower stationary magnetic field according to the present invention
7 is a cross-sectional view showing an upper stationary magnetic field according to the present invention.
8 is a cross-sectional view of a conventional vibration motor using a brush and a commutator

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

As shown in Figure 1, the linear vibration device according to the present invention is a magnet 23 for creating a permanent magnetic field, the lower plate 22 and the upper plate 24, combined to concentrate the magnetic direction of the magnet 23 in a specific direction, The vibrator 21 is coupled to the upper plate 24 and configured to increase the sensation vibration, and is finally assembled to the vibrator to constitute the vibrator 20.

At this time, the vibrator 21 coupled to the vibrator 20 typically has a heavier mass than iron, and is combined with the upper side of the upper plate 24 to effectively transmit the vibrating sound of the vibrator 20 to the outside. And the elastic member 31 configured to help the movement of the high vibration body 20 in a predetermined direction up and down, the case 32 is coupled to the elastic member 31 and the inside empty to transmit the vibration sound to the outside; It is done in combination.

In addition, the elastic member 31 connected to the vibrating body 20 has a vibrating body during vertical movement of the vibrating body 20 by allowing the start portion to be coupled to the upper plate 24 and the end portion to the case 32. In order to minimize the shaking of the 20 and to penetrate the center, the upper plate 24 is preferably larger than the lower plate 22 in order to facilitate coupling with the vibrator 21.

In addition, the lower side of the vibrating body 20 and the coil 14 capable of generating an electromagnetic force, and a yoke configured to be concentrated in one direction while being inserted into the coil to maximize the electromagnetic force generated by the coil 14 ( Stator (10) consisting of a bracket (11) coupled to the PCB (12) capable of transmitting electrical signals of a specific frequency transmitted from the outside and having an extension piece protruding at one edge of the cover which is empty inside. To form.

In this case, the yoke 15 used to maximize the electromagnetic force generated by the coil 14 has to have an outer diameter smaller than the inner diameter of the coil 14 so that the yoke 15 can be inserted into the coil 14 and absorbs the electromagnetic force concentrated by the coil 14. It is preferable to form the shape of the projection circumference 15A in the same uniaxial direction so as to correspond to the magnetic lines of force by the upper plate 24 and the lower plate 22, and the solder lines of the PCB 12 and the coil 14 are soldered or It is preferable to attach and protect the protection plate 13 in order to protect the coil soldering or welding at the time of vertical movement of the vibrating body in the coupling to transmit the external electrical signal to the coil by welding.

In addition, the coil 14 is preferably configured in an annular shape and the magnet 23 is formed in an annular shape with an inner diameter larger than the outer diameter of the coil 14 so that the magnet 23 can be inserted outside the coil 14. desirable.

Figure 2 is a perspective view of the overall assembly of the present invention made of the above components.

FIG. 3 is a perspective view of a conventional linear vibration motor. S-pole is formed at the yoke 84 and N-pole is formed at the plate 83 by the magnetic force of the magnet 82. Assuming that the N pole is formed upward by the signal (+ A), the vibrating body 80 moves downward by Fleming's left-hand law and while the electric signal (+ A) is being applied. The vibrating body 80 will continuously move downward and will hit the bracket 88. On the contrary, when the electrical signal (-A) is applied to the coil 87, the S pole is formed upward and vibrates by Fleming's left hand law. The sieve 80 moves upward and the vibrating body continuously tries to move upward while the electric signal (-A) is being applied to the case 81 or the elastic member 86 to generate mechanical touch noise. It is.

Figure 4 is an example using a damper 170 on the lower side and a magnetic fluid 160 on the upper side in order to overcome the touch noise of the conventional linear vibration motor, the vibrating body 100 by the electric signal (+ A) It will descend in the downward direction and will hit the bracket 115. To prevent this, the damper 170 is used on the lower side, and the material of the damper 170 is used to absorb the shock. The mechanical shock caused by the operation cannot be avoided, and by not absorbing 100%, the mechanical shock sound of the vibrating body 100 is transmitted to the damper 170 to generate mechanical noise. Interlocking with each other to amplify several high-frequency noise noises to generate vibration noise, and to cause discomfort to consumers, It may cause a defect.

On the contrary, the vibrating body 100 rises upward by the electrical signal (-A) and hits the case 110 or the elastic member 130. In order to prevent this, the magnetic fluid 160, which may be a magnetic body by magnetic force, is not used to contact the magnetic body. However, the impact of the vibrating body 100 is changed by the amount of the magnetic fluid 160, and the magnetic body is overcome to overcome this problem. Increasing the amount of fluid 160 causes the up and down motion of the vibrating body 100 to be constrained, resulting in a sharp decrease in the amount of vibration, which makes it difficult to manage the proper amount and manages the appropriate amount. Portable and variable use of different environments and locations can be a cause of progressive noise and degradation due to inadequate maintenance of initial quantities.

5 is a magnetic circuit configuration for overcoming a conventional problem, the magnetic force of the magnet 23 is a magnetic force line flowing in one direction by the upper plate 24 and the lower plate 22 generates a coil ( 14) the electromagnetic force by the magnetic force line is collected through the yoke (15) in the center and collected at the protrusion circumference (15A) of the yoke (15), and the magnetic force gathered on the upper plate 24 and the lower plate (22) The vibrating body 20 operates up and down by the attraction force and the repulsive force with the electromagnetic force collected in the protrusion circumference 15A of the yoke 15 by the alternating power source.

6 is a cross-sectional view showing a lower stator magnetic field according to the present invention, the permanent magnetic field generated by the magnet 23 of the vibrating body 20 has an S pole formed in one direction of the upper plate 24 and the lower plate 22 is An N pole is formed and an electromagnetic force is generated in the coil 14 by an electric signal (+ A) of a specific frequency input from the outside. The coil 14 generated by the electromagnetic force is concentrated in one direction of the yoke 15 N pole is formed, the lower plate 22 formed by the magnet 23 is the repulsive force to push out and the upper plate 24 is attracting force generated vibrating body 20 is rapidly moved to the lower side and the vibration thus moved The sieve 20 reaches a magnetically stable position and stops even when the electric signal + A is continuously applied. Thereby, the vibrating body 20 can be stopped to a magnetically stable position, and stable operation can be maintained.

7 is a cross-sectional view showing an upper stator field according to the present invention, the permanent magnetic field generated by the magnet 23 of the vibrating body 20 is formed with an S pole in one direction of the upper plate 24 and the lower plate 22 is The N pole is formed and the opposite electromagnetic force is generated in the coil 14 by the electrical signal (-A) of a specific frequency input from the outside, and thus the S pole in the opposite direction is formed in the yoke 15 and the magnet 23 The upper plate 24 formed by) generates a repulsive force to push and the lower plate 22 generates an attractive force, and the vibrating body 20 is rapidly moved upward, and the vibrating body 20 thus moved is magnetically. A stable position is reached and stops even when the electrical signal (-A) is continuously applied. This makes it possible to stop the vibrating body in a magnetically stable position and maintain stable operation.

When a sine wave close to the square wave of the electrical signals (+ A) and (-A) is rapidly applied to the coil 14 alternately, the yoke 15 concentrates the alternating magnetic field on the protruding circumference 15A and vibrates 20 ) Is to move up and down and the vibration sound by the vibrating body 20 is up and down is transmitted to the outside of the case 32 of the cover is empty through the elastic member 31 to the outside is sent to the outside.

8 is a cross-sectional view showing a conventional vibration motor using a brush 105 and a commutator 111.

As described above, the linear vibration device according to the present invention can semi-permanently preserve the life of the vibration motor by not using the brush 105 and the commutator 111 applied to the existing vibration motor, and the proposed method in the same manner. The magnetic fluid 160 and the damper 170 are used to prevent the touch noise between the vibrating body 80, 100, the case 81, 110, and the brackets 88, 115 according to the up and down motions. And using magnetic force and repulsive force with the yoke 15 that maximizes the magnetic force of the coil 14 by using the upper plate 24 and the lower plate 22 to prevent the progressive vibration characteristic from being deteriorated magnetically and stably. It can be said to be an alternative that effectively improves stable operation characteristics and fast response speed.

In addition, although illustrated and described with reference to the embodiments of the drawings, it is common in the art that the present invention may be variously modified and changed without departing from the spirit or the scope of the present invention provided by the following claims. I would like to know that those who have knowledge of Easily know.

DESCRIPTION OF SYMBOLS 10 Fixture 11: Bracket 12: PCB 13: Protective plate 14: Coil 15: York
20: Vibrating body 21: Oscillator 22: Lower plate 23: Magnet 24: Upper plate
31: elastic member 32: case
81,110: Case 82,124: Magnet 83,126: Plate 84,122: York
85, 142: vibrator 86, 130: elastic member 87, 150: coil 88, 115: bracket
160: magnetic fluid 170: damper
111: commutator 105: brush

Claims (9)

A magnet 23 for generating a magnetic field; A lower plate 22 coupled to concentrate the magnetic direction of the magnet 23 in one direction; An upper plate 24 for concentrating the magnetic force direction of the magnet 23 in one direction; An oscillator 21 coupled to the upper plate 24 and configured to increase haptic vibration; A vibrator 20 finally assembled by the vibrator 21;
An elastic member 31 coupled to the upper surface of the upper plate 24 to effectively transmit the vibration sound of the vibrating body 20 and configured to help the movement of the vibrating body 20 to move up and down in a predetermined direction. ); A case 32 having an empty inside in combination with the elastic member 31 to transmit a vibration sound to the outside;
The lower side of the vibrating body 20, the yoke 15 for concentrating the electromagnetic force in one direction (coil 14 for generating an electromagnetic force by combining with the yoke 15; coupled to the coil 14 is transmitted from the outside PCB (12) capable of transmitting electrical signals of a specific frequency; a bracket (11) coupled to the PCB 12 and having an extension piece protruding at one edge; a fixed body (10) finally assembled into the bracket (11) :
Linear vibrating device, characterized in that consisting of a case (32) finally coupled to the fixed body (10). The method of claim 1,
In order to concentrate the electromagnetic force of the coil 14 and maintain stable magnetic properties, the outer diameter of the yoke 15 used must be smaller than the inner diameter of the coil 14, and the shape of a part of the upper portion is the upper side of the electromagnetic force concentrated by the coil 14. Linear vibration device characterized by a yoke 15 having an outer diameter larger than the outer diameter of the coil 14 so as to correspond to the magnetic lines of force by the plate 24 and the lower plate 22, and provided in the shape of a projecting circumference 15A. . The method of claim 2,
A linear vibration device, characterized by a bracket (11) having a central projection hole (11A) at a central position where it meets the lower circumferential portion (15B) of the yoke (15) to fix the yoke (15). The method of claim 1,
Magnet 23 is a linear vibration device, characterized in that it comprises an annular magnet (23) having an inner diameter larger than the outer diameter of the yoke (15) to correspond to the electromagnetic force collected in the yoke (15). The method of claim 4, wherein
In order to change to the one side direction of the magnetic field of the magnet 23, the upper side and the lower side is provided with an upper plate 24 and a lower plate 22 having the same annular shape as the annular shape of the magnet 23. Vibration device. The method of claim 5
The lower plate (22) and the upper plate (24), the upper plate (24) is a linear vibration device, characterized in that the outer diameter is larger than the lower plate (22) to facilitate the coupling with the vibrator (21). The method of claim 1
Linear vibrating device, characterized in that the vibrator (21) coupled to the vibrating body (20) typically has a heavier mass than iron. The method of claim 1,
The elastic member 31 connected to the vibrator 20 allows the start part to be coupled to the upper plate 24 and the end part to be coupled to the case 32 so as to minimize shaking during the operation of the vibrator 20. To this end, the linear vibration device, characterized in that the center of the elastic member 31 is penetrated. The method of claim 1
In the transfer of the external electrical signal to the coil 14 by combining the lead line of the PCB 12 and the coil 14 by soldering or welding, the soldering or welding portion of the coil 14 during the lowering operation of the vibrating body 20 is removed. A linear vibration device, characterized by attaching a protective plate (13) for protection.

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