KR20170035464A

KR20170035464A - Linear Actuator

Info

Publication number: KR20170035464A
Application number: KR1020150134308A
Authority: KR
Inventors: 이인호
Original assignee: 이인호
Priority date: 2015-09-23
Filing date: 2015-09-23
Publication date: 2017-03-31

Abstract

According to the present invention, there is provided a magnetic bearing device comprising: a fixing portion for providing an internal space of a predetermined size; a permanent magnet disposed inside the fixing portion; a motion portion including a weight coupled with the permanent magnet; And a coil having a plurality of polarities in a direction of movement of the moving part, the linear vibrator being configured to have a plurality of polarities of the coils, And the magnetic force of the permanent magnets is maximized to provide a linear oscillator capable of generating a larger vibration force.

Description

[0001] The present invention relates to a linear oscillator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear oscillator, and more particularly to a linear oscillator mounted on a personal portable terminal, a tablet PC, a game machine, or a remote controller and designed to vibrate.

In general, one of the functions necessary for a communication device is a receiving function. This incoming function has the function of notifying by sound or vibration.

The vibration function is mainly used when the melody or bell is transmitted to the outside through the speaker to prevent damage to the other person. For this vibration, a small actuator is driven so that the driving force is transmitted to the case of the device So that the device can vibrate.

In recent years, as the spread of smart phones and tablets equipped with a touch screen is increasing, a vibration function has been required to provide a virtual touch feeling to a user beyond a simple incoming call function.

When only the incoming call function is needed, a vibrator of a type in which a weight is rotated is mainly used. However, in a device equipped with a touch screen, a linear vibrator that performs a linear motion is mainly used because a quick response to a touch response is required.

Conventional linear oscillators operate by electromagnetic force with one coil and one permanent magnet disposed thereon. However, there is a problem in that the vibrating force is weak due to the structure using only the polarity of one side of the coil and the permanent magnet.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems of the conventional art described above, and it is an object of the present invention to provide a linear oscillator having a permanent magnet, a weight, an elastic member, a coil, and a power supply, And the magnetic force of the permanent magnet is maximized, thereby increasing the vibration force of the linear vibrator.

In order to achieve the above object, there is provided a magnetic bearing device comprising: a stationary part providing an internal space of a predetermined size; a permanent magnet disposed inside the stationary part and having a space inside; a moving part including a weight wrapped around a part of the permanent magnet; An elastic member having one side fixed to the inner side of the fixed portion and the other side connected to the moving portion, and a coil having a plurality of polarities arranged in the same direction as the magnetization direction of the permanent magnet, .

A permanent magnet coupled to the inner side of the fixed portion, a coil having a plurality of polarities arranged to face the permanent magnets so as to face each other and to face the permanent magnet in the same direction as the magnetization direction of the permanent magnet, A moving part including a part of the coil and a combined weight, and an elastic member having one side fixed to the inside of the fixing part and the other side connected to the moving part.

A fixed portion for providing an internal space of a predetermined size, a weight disposed inside the fixed portion, a moving portion including a permanent magnet coupled to a portion of the weight, a fixed portion fixed inside the fixed portion, And a coil having a plurality of polarities in the same direction as the magnetization direction of the permanent magnets, the plurality of coils being disposed so as to face each other and surround the outer side of the permanent magnets.

A permanent magnet disposed inside the fixed portion and provided with a space therebetween; a permanent magnet disposed so as to face the inner side of the permanent magnet and facing the same direction as the magnetization direction of the permanent magnet; A coil having a plurality of polarities, a moving part including a weight coupled to the inside of the coil, and an elastic member having one side fixed to the inside of the fixing part and the other side connected to the moving part.

The fixing part may include a case and a bracket.

The coil may be formed as a single coil, and a certain length of the coil may be integrally formed by continuously winding the coil after changing the direction of the coil after winding. Also, the coil may have a plurality of coils which are coupled so that the winding directions are opposite to each other, and the adjacent portions have the same polarity to each other and may be integrally formed. The coil may have a plurality of coils connected in the same winding direction so that the direction in which the power is input is opposite to each other, and the adjacent portions may have the same polarity to each other and be integrally formed.

The elastic member may be composed of a plurality of elastic members.

And a support member may be provided inside the coil. The support member may be made of a ferromagnetic material.

And a yoke may be provided at a boundary where the winding direction of the coil changes. A yoke may be provided on one side of the permanent magnet. The yoke is preferably made of a ferromagnetic material. The support member and the yoke may be integrally formed.

And a power supply device electrically connected to the coil to apply external power to the coil. The power supply device may be formed as a circuit board and integrated with the bracket.

The features and advantages of the present invention will become apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in the present specification and claims should be construed in accordance with the spirit and scope of the present invention, on the basis of the principle that a concept of a term can be properly defined to explain it in a normal and best manner. .

According to the present invention, in a linear oscillator having a permanent magnet, a weight, an elastic member, a coil, and a power supply device, the polarities of the coils are made to be plural, and the interaction between the electromagnetic force of the coils and the magnetic force of the permanent magnets is maximized Thereby providing a linear oscillator capable of generating a large vibration force.

1 is a cross-sectional view of a linear oscillator according to the present invention;
2 is an exploded perspective view of a linear oscillator according to the present invention.
Fig. 3 shows a coil configuration of a linear oscillator according to the present invention.
Fig. 4 shows another embodiment of the linear oscillator according to the present invention.
5 shows another embodiment of the linear oscillator according to the present invention.
6 shows another embodiment of the linear oscillator according to the present invention.
7 shows another embodiment of the linear oscillator according to the present invention.
Fig. 8 shows the operation principle of the linear oscillator according to the present invention.
9 shows a conventional linear oscillator

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

FIG. 1 is a cross-sectional view of a linear vibrator 100 according to the present invention, and FIG. 2 is an exploded perspective view of the linear vibrator 100. As shown in the figure, the linear vibrator 100 includes a fixed portion 110 for providing an internal space of a predetermined size, a permanent magnet 123 disposed inside the fixed portion 110, a permanent magnet 123 coupled to the permanent magnet 123, An elastic member 113 having one side fixed to the inside of the fixing part 110 and the other side connected to the moving part 120, a permanent magnet 123 And a power supply unit 115 connected to the coil 125 to supply power.

The fixing part 110 has a predetermined space therein to fix the internal components, protect the product from external impacts, and prevent contamination by foreign matter. The fixing part 110 is a part that can realize various shapes such as a square column shape and a column shape according to the design of the object to be applied. The shape of the fixing part 110 also affects the shape of the internal component And internal components may also be formed in a similar shape to that of the fixing portion 110, depending on the shape of the fixing portion 110.

The embodiment shown in FIGS. 1 and 2 adopts a cylindrical shape fixing portion 110 as a preferred embodiment thereof, and the inner components also have a circular shape as a basic shape. It is to be understood that the illustrated embodiment is merely an example and does not mean that the shape of the housing and the internal components is limited thereto.

The fixing part 110 may be integrally formed. However, if considering the manufacturing process, the fixing part 110 may include a case 111 which is partially opened and a bracket 112 which is coupled to the open side of the case 111, The case 111 and the bracket 112 may be assembled after the internal component is assembled with the case 111 or the bracket 112. [

Also, a part of the fixing portion 110 may be formed of a circuit board to connect the power supply unit 115.

Hereinafter, in describing the internal components in the case of employing the cylindrical fixing portion 110 covering the entire surface, although a specific configuration suitable for the cylindrical fixing portion 110 is inevitably referred to, And that the scope of the present invention is not intended to be limited to that form.

The permanent magnet 123 is disposed inside the fixing portion 110 and is preferably vertically magnetized in the same direction as the motion of the motion portion 120 including the permanent magnet 123 as shown in FIG. Do.

An electromagnetic force is generated when power is applied to the coil 125 by arranging the coil 125 facing the permanent magnet 123 so that the permanent magnet 123 interacts with the permanent magnet 123, And moves to the lower side.

As shown in FIG. 3, the coils 125 are formed so that the winding directions of the upper side and the lower side in the magnetizing direction of the permanent magnet 123 are opposite to each other, and have a plurality of polarities when power is applied. The coil 125 may be integrally formed by winding the section of a predetermined length in a state where the winding direction is reversed after the winding, or a plurality of the coils 125 may be coupled such that the winding directions are reversed, 125 may have the same polarity.

The conventional linear vibrator 200 has a structure in which the coil 125 and the permanent magnet 123 face only one of the positive electrodes and only a part of the generated electromagnetic force interacts with each other and the vibrating force can not be fully utilized. A plurality of polarities are generated when power is applied to the coil 125 of the linear vibrator 100 according to the present invention, and thus the vibrating force generated by the electromagnetic force can be maximized by interacting with all of the poles of the permanent magnets 123.

The weight (127) is coupled to the permanent magnet (123) to increase the weight of the motion unit (120) and to increase the motive power. The weight 127 is preferably made of a material having a large specific gravity such as tungsten in order to maximize the weight.

One side of the elastic member 113 is fixed to the fixed portion 110 and the other side of the elastic member 113 is connected to the moving portion 120 so that the vibration force generated by the coil 125 and the permanent magnet 123 By resonance. The elastic member 123 can be fixed by bonding, welding, caulking, or the like, and is preferably made of a metal having good elasticity.

In order to prevent noise or breakage caused by an impact due to contact when the moving part 120 moves upward or downward, a part of the moving part 120, which may contact with the fixing member, the elastic member 113, And a damping member 119 may be provided between the two members.

3 illustrates an embodiment of the coil 125 configuration of the linear oscillator 100 according to the present invention. 3 (a), the coils 125 are formed so that the winding directions of the upper side and the lower side in the magnetizing direction of the permanent magnet 123 are opposite to each other, and have a plurality of polarities when power is applied . When a voltage is applied to the coil 125 as shown in FIG. 3 (b), a plurality of S-poles-N-poles-N-poles-S poles are formed from above the coils 125 according to the winding direction of the coils 125 And the boundary surfaces at which the winding directions of the coils 125 are changed have the same polarity. In addition, the polarity of the coil 125 may be polarity such as N-pole, S-pole, S-pole, and -N-pole depending on the direction of the applied voltage. The coil 125 may be integrally formed by winding the section of a predetermined length in a state where the winding direction is reversed after the winding, or a plurality of the coils 125 may be coupled such that the winding directions are reversed, 125 may have the same polarity. Also, the plurality of coils 125 may be coupled to each other so that the winding directions are the same, and the direction in which power is input may be reversed.

As shown in FIG. 3 (c), in the conventional linear vibrator 200, only one of the poles faces the coil 125 and the permanent magnet 123, and only a part of the generated electromagnetic force interacts to fully utilize the vibration power It is a bad structure. 3 (b), the linear oscillator 100 according to the present invention generates a plurality of polarities when the power is applied to the coils 125, and interacts with all the positive poles of the permanent magnets 123, It is possible to maximize the generated vibration force.

4 shows another embodiment of the linear oscillator 100 according to the present invention.

The permanent magnet 123 may be disposed on the inner side of the weight 127 and the coil 125 may be provided on the inner side of the permanent magnet 123 as shown in FIG. The coil 125 may be disposed on the inner side of the weight 127 and the permanent magnet 123 may be disposed on the inner side of the coil 125. [ If the permanent magnet 123 is fixed and the coil 125 is included in the moving part 120, even if there is a ferromagnetic material at a close distance, the performance of the moving part 120 can be maintained without significantly affecting the vibration of the moving part 120, It is easy to add a structure for magnetic shielding with a ferromagnetic material. The permanent magnet 123 is disposed on the outer side of the weight 127 and the permanent magnet 123 is provided on the outer side of the coil 125 as shown in FIG. 4 (b) By increasing the diameter of the permanent magnets 125, the area facing each other is maximized, and the vibration force generated by the interaction between the permanent magnets 123 and the coils 125 can be increased. 4 (c), when the coil 125 is disposed outside the weight 127 and the permanent magnet 123 is provided outside the coil 125, the permanent magnet 123 and the coil It is possible to maximize the facing area of the moving part 125 and prevent the moving part 120 from being affected by the external ferromagnetic material.

Fig. 5 shows another embodiment of the linear oscillator 100 according to the present invention. As shown in the figure, a plurality of elastic members 113 are provided to fix the motion unit 120 in a symmetrical manner, thereby enabling stable motion and firmly fixing the durability. Also, various resonance frequency characteristics can be realized by using the elastic members 113 having different elastic moduli. When the elastic member 113 is made of a ferromagnetic material and is arranged to engage with one side of the permanent magnet 123 or the coil 125, leakage of the magnetic force is prevented, thereby reducing the loss of magnetic force, .

6 shows another embodiment of the linear oscillator 100 according to the present invention. As shown in the drawing, the support member 129 may be disposed inside the coil 125 to support the inside of the linear vibrator 100 to make it more rigid. The support member 129 may be made of a ferromagnetic material The electromagnetic force of the coil may be increased. Further, the yoke 121 may be provided at a boundary where the winding direction of the coil 125 changes. At this time, the yoke 121 may be formed of a ferromagnetic material to constitute a magnetic circuit, thereby reducing the loss of magnetic force and increasing the vibration power. The yoke 121 may be coupled to one side surface of the permanent magnet 123 to prevent magnetic leakage and to be firmly coupled to the other member such as the elastic member 113 using welding. The support member 129 and the yoke 121 may be integrally formed using processing, pressing, injection, or the like.

7 shows a structure in which a part of the fixing unit 110 is formed of a circuit board and the power supply unit 115 is connected to simplify the manufacturing process. Since the external electrode 117 is provided on one side of the power supply device 115, the linear oscillator 100 can be mounted simultaneously with power connection using surface mounting technology, thereby improving productivity.

As shown in the figure, the external electrodes 117 may be arranged side by side, or one external electrode 117 may surround the other external electrodes 117.

8 shows the operation of the linear oscillator 100 according to the present invention.

As shown in the figure, when the power is not applied, the permanent magnet 123 is stopped. When power is supplied to the coil 125 through the power supply unit 115, a magnetic force is generated in the coil 125 according to the direction of the voltage applied to the coil 125 so that the permanent magnet 123 is moved upward or downward .

Fig. 9 shows a conventional linear oscillator 200. Fig. As shown in the drawing, the conventional linear oscillator 200 has a structure in which the coil 125 and the permanent magnet 123 face one of the positive poles and only a part of the generated electromagnetic force interacts with each other, to be.

While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention .

100: linear oscillator 110:
111: Case 112: Bracket
113: elastic member 115: power supply unit
117: external electrode 119: damping member
120: Vibrating part 121: York
123: permanent magnet 125: coil
127: weight 129: support member
200: Conventional linear oscillator

Claims

A fixing part for providing an internal space of a predetermined size;
A permanent magnet disposed inside the fixed portion and having a space inside;
A moving part enclosing a part of the permanent magnet and including a combined weight;
An elastic member having one side fixed to the inside of the fixing part and the other side connected to the moving part;
And a coil disposed so as to face the inner side of the permanent magnet and facing the permanent magnet and having a plurality of polarities in the same direction as the magnetization direction of the permanent magnet,

A fixing part for providing an internal space of a predetermined size;
A permanent magnet coupled to the inside of the fixing unit;
A coil which surrounds the permanent magnet and is spaced apart from the permanent magnet so as to face the permanent magnet and has a plurality of polarities in the same direction as the magnetization direction of the permanent magnet;
A moving portion surrounding a portion of the coil and including a combined weight;
And an elastic member having one side fixed to the inside of the fixing part and the other side connected to the moving part.

A fixing part for providing an internal space of a predetermined size;
A weight disposed inside the fixing portion;
A moving part including a permanent magnet which surrounds a part of the weight and is coupled;
An elastic member having one side fixed to the inside of the fixing part and the other side connected to the moving part;
And a coil which surrounds the outside of the permanent magnet and is disposed so as to face to face to be spaced apart from each other and has a plurality of polarities in the same direction as the magnetization direction of the permanent magnet,

A fixing part for providing an internal space of a predetermined size;
A permanent magnet disposed inside the fixed portion and having a space inside;
A coil disposed so as to face the inner side of the permanent magnet so as to face the permanent magnet and having a plurality of polarities in the same direction as the magnetization direction of the permanent magnet;
A moving part including a weight coupled to the inside of the coil;
And an elastic member having one side fixed to the inside of the fixing part and the other side connected to the moving part.

5. The compound according to any one of claims 1 to 4,
Wherein the fixing portion is formed to include a case and a bracket,

5. The compound according to any one of claims 1 to 4,
Wherein the coil is formed by a single coil, and a certain length of the coil is continuously wound by changing the direction of the winding after the winding to form a unitary shape.

5. The compound according to any one of claims 1 to 4,
Wherein the coil includes a plurality of coils which are coupled such that the winding directions are opposite to each other and the adjacent portions have the same polarity to each other,

5. The compound according to any one of claims 1 to 4,
Wherein the coil has a plurality of coils connected in a same winding direction so that the direction of input of the power is opposite to each other so that adjacent portions have the same polarity and are integrally formed.

5. The compound according to any one of claims 1 to 4,
Characterized in that the elastic member is constituted by a plurality of linear members

5. The compound according to any one of claims 1 to 4,
And a support member provided on the inside of the coil.

11. The method of claim 10,
Characterized in that the support member is made of a ferromagnetic material.

5. The compound according to any one of claims 1 to 4,
And a yoke is provided at a boundary portion where the winding direction of the coil changes.

5. The compound according to any one of claims 1 to 4,
And a yoke is provided on one side surface of the permanent magnet.

14. The method according to claim 12 or 13,
Characterized in that the yoke is made of a ferromagnetic material.

13. The method according to claim 10 or 12,
Characterized in that said support member and said yoke are formed integrally with each other,

5. The compound according to any one of claims 1 to 4,
And a power supply device electrically connected to the coil so as to apply external power to the coil.

The method according to claim 5 or 16,
Wherein the power supply device is formed as a circuit board and is integrally formed with the bracket.