KR101748365B1

KR101748365B1 - Linear type vibration actuator

Info

Publication number: KR101748365B1
Application number: KR1020150170615A
Authority: KR
Inventors: 김승섭
Original assignee: 김승섭; 송익근; 구노림
Priority date: 2015-12-02
Filing date: 2015-12-02
Publication date: 2017-06-28
Also published as: KR20170064758A

Abstract

A vibrating linear actuator is disclosed. Industrial Applicability The present invention is economical due to the simple construction of the solenoid coil, the vibrator and the case, the assembly is simple and the manufacturing cost is reduced, the leakage of the magnetic flux is minimized by the fixed case surrounding the solenoid coil, There is provided a vibrating linear actuator having an effect of providing an efficient vibration and a life span remarkably increased by a strip spring having an elastic force.

Description

[0001] LINEAR TYPE VIBRATION ACTUATOR [0002]

The present invention relates to an actuator, and more particularly, to a vibration type linear actuator having a simple configuration such as a solenoid coil, a vibrator, and a case and minimizing leakage of magnetic flux and providing economical and efficient vibration by vibrators vibrating in different directions .

2. Description of the Related Art A drive circuit for a vibration type actuator is known as a drive circuit for driving a resonance system capable of converting and storing energy by inertia of an elastic body and a mover having a mass in the past. The vibration type actuator includes a stator having a coil, a mover having a permanent magnet, and a frame portion to which the stator is fixed and which supports the mover in a reciprocating manner via a spring.

On the other hand, the vibratory linear actuator is provided with a motor facility for generating a back-and-forth vibration operation, not a full rotary motion. Such a facility requires not only a conventional motor bearing structure for supporting the movement but also a specific structural element for restricting the motor drive shaft and the workpiece motion to predetermined angular movements. Such bearings or other elements are typically expensive and difficult to manufacture and have the problem of reliability / durability in using the article.

More specifically, the linear actuator of the vibrating type has a signal indicating a position where the moving direction of the mover is inverted (a signal indicating a timing at which the exciting coil excited to the coil becomes substantially zero) and a signal indicating the velocity of the mover The induced voltage is applied to the coil by a sensorless feedback control of the application time of the alternating voltage to the coil by using the induced voltage of a predetermined time after the reference signal is detected as a control signal.

Although the linear vibration type actuator has been used in a specific application such as an electric shaver, it has been recently used for applications such as being employed in a device for generating a vibration for feeding an operation feeling to a user when the touch panel is pressed . It is expected that the number of shipments of the linear vibration motor will increase in the future as the use of such haptics is expanded.

Thus, the development and filing of motors for personal care products that are rugged, noise-free, and require no bearings or restraining members for operation while generating a defined oscillatory motion are actively being developed.

Korean Patent No. 10-0676452 (Jan. 24, 2007)

Accordingly, it is an object of the present invention to solve such a problem, and it is an object of the present invention to solve the above problems by providing a solenoid coil, a vibrator and a case, To provide an economical and efficient vibration by a vibrator vibrating in the direction of the vibrating linear actuator, and at the same time, the life span remarkably increases by a strip spring having an elastic force.

According to an aspect of the present invention, there is provided a solenoid coil comprising: a solenoid coil wound around a center core having a hollow therein and to which an AC power is applied; a vibration shaft inserted into the hollow; A first vibrator connected to the bar and the extension bar and having a fixing bar fixed to the first body, an oscillation shaft inserted in the hollow and spaced apart from the oscillation axis, an extension bar extending in the oscillation axis, And an outer case having a first body and a second body spaced apart from the first body, the second vibrator being connected to the extension bar and having a fixing bar fixed to the second body.

According to another aspect of the present invention, there is provided a solenoid coil comprising: a solenoid coil wound around a center core having a hollow therein and to which an AC power is applied; and a flange inserted into the hollow to be magnetized by an electromagnetic force of the solenoid coil, A magnet having a first magnet disposed at an upper end of the iron core and having a magnetism and a second magnet having a polarity different from that of the first magnet, and a magnet coupled to the first magnet, A vibration receiver including a first vibration receiver fixed to the first body, a second vibration receiver coupled to the second magnet and fixed to the second body, and a solenoid coil, an iron core, and a vibration receiver, And an outer case having a main body and a second main body spaced apart from the first main body.

According to the vibrating linear actuator of the present invention described above, the assembly is simple due to the simple structure, thereby reducing the manufacturing cost, minimizing the leakage of the magnetic flux, providing economical and efficient vibration, and significantly extending the service life.

1 is a perspective view of a vibration type linear actuator according to an embodiment of the present invention.
2 is an exploded perspective view showing the vibrator, the fixed case, and the solenoid coil of FIG.
3 is a perspective view showing the vibrator of FIG. 2. FIG.
4 is a cross-sectional view taken along the line AA in Fig.
5 is a perspective view showing the vibratory linear actuator of FIG. 1 as viewed from below.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

1 is a perspective view of a vibration type linear actuator according to an embodiment of the present invention. The actuator 100 according to the present invention is characterized in that it can generate vibrations without using permanent magnets. Moreover, the actuator 100 can be easily assembled because of its simple structure, and thus manufacturing cost can be reduced. Hereinafter, the configuration of the present invention will be described with reference to the drawings.

1 to 2, a vibratory linear actuator 100 according to an embodiment of the present invention includes a solenoid coil (not shown) having a hollow 111 formed therein and to which an AC power is applied A first vibrator 120, a second vibrator 130, and a second vibrator 130 made of iron material inserted into the hollow 111 and magnetized and reciprocating in opposite phases to each other by the electromagnetic force of the solenoid coil 110, A fixed case 140 for receiving the solenoid coil 110, and an outer case 150 for receiving the fixed case 140.

In this case, the solenoid coil 110 is a general solenoid in which a coil is wound around a center core 112 having a hollow 111 formed therein.

2 to 3, the vibration shafts 121 and 131 inserted into the hollows 111 of the solenoid coil 110 are arranged in the longitudinal direction C (See FIG. 3), spaced apart from each other by a predetermined distance, horizontally disposed on the vibration shafts 121 and 131, and fixed to the outer case 150 by a predetermined distance in the width direction (direction D) Bars 123 and 133 and extension bars 122 and 132 that extend vertically from the vibration shafts 121 and 131 and extend to the fixing bars 123 and 133.

In this case, the vibrating shafts 121 and 131 are spaced apart from each other so as not to contact each other. Specifically, the first vibrating shafts 121 are formed in a conical shape and the second vibrating shafts 131 can accommodate conical shapes. A space is formed therein. Accordingly, the first vibrator 120 and the second vibrator 130 are entirely spaced apart from each other at a predetermined interval and are not in contact with each other. The vibrating shafts 121 and 131 pass through the through hole 142 of the fixed case 140 and are inserted into the hollow 111 of the solenoid coil 110.

Referring again to FIG. 2, the fixing case 140 is firmly fixed to the outer case 150 by a fixing protrusion 141 protruding from one side. In this case, the fixing case 140 is formed by surrounding the solenoid coil 110 with the material of the iron material, thereby minimizing the leakage of the magnetic flux generated in the solenoid coil 110.

4, when AC power is applied to the solenoid coil 110, a magnetic field is generated in the inner hollow 111 of the center core 112, and the vibration axis 121, and 131 are magnetized, reciprocating and repetitively pulling and pushing each other. Further, since the vibrators 120 and 130 are fixed to the outer case 150, such vibration is transmitted to the outer case 150.

In this case, the first oscillation shaft 121 is tapered in a conical shape, and the second oscillation shaft 131 has a space formed therein to accommodate the conical shape, so that the second oscillation shaft 131 has a large surface area, The pushing can be repeated. In the present invention, the shape of the first oscillation shaft 121 is described as a conical shape. However, the present invention is not limited to this, but may be adopted as long as it can be separated from the second oscillation shaft 131 by a wide cross sectional area.

1, the fixing bars 123 and 133 of the vibrators 120 and 130 are coupled to the upper side of the outer case 150. In this case, the outer case 150 is connected to the first vibrator 120, And a second body 170 coupled to the second vibrator 130. The first body 160 is coupled to the first vibrator 130 and the second body 170 is coupled to the second vibrator 130. [ In this case, the first body 160 and the second body 170 are spaced apart from each other by a predetermined distance, and the lower part is fixed to the outer case 150. The vibration of the vibrators 120 and 130 To bring elastic deformation together and to enhance vibration power.

The outer case 150 may be provided with a strip spring 152 having an elastic force that is downwardly projected to contact the extension bars 122 and 132 of the vibrators 120 and 130. Specifically, the strip spring 152 is provided on the first body 160 and the second body 170, respectively. The strip spring 152 protrudes downward from the bodies 160 and 170 to absorb vibrations of the vibrators 120 and 130 The strip spring 152 can return to the initial position.

1 and 5, four strip strips 152 are provided on the left and right sides of the strip spring 152. In this case, the strip strip 152 has a first Four strip springs 152a and 152d, and second and third strip springs 152b and 152c positioned on the inner side. This is also applied to the opposite strip spring as the symmetry.

The first and fourth strip springs 152a and 152d are coupled to the upper side of the flange 153 extending upward from the lower end of the outer case 150 and the second strip spring 152b is coupled to the first body 160, And the third strip spring 152c may extend from the second body 170 as well.

In this case, the first body 160 and the second body 170 are separated from each other in the outer case 150. The strip spring 152 has a connection hole 152e formed therein, An elastic plastic bar (not shown) may be inserted into the connection hole 152e. Therefore, due to the elastic force of the plastic bar, due to the pulling of the vibrators 120 and 130 and the vibration of the pushing, elastic deformation is caused together to enhance the vibration power.

The solenoid coil 110 and the vibrators 120 and 130 that are magnetized and vibrated due to the solenoid coil 110 and the fixed case 140 that minimizes the leakage magnetic flux and the fixed case 140 are fixed And when the AC power is supplied to the solenoid coil 110, the vibrators 120 and 130 are magnetized by a tapered vibration axis in a conical shape and are repeatedly pulled and pushed together, .

Particularly, the actuator 100 according to the present invention does not use permanent magnets, so that the manufacturing cost is reduced. The actuator 100 may be coupled to the first cutter and the second body 170 may be included in the vibrating dry shaver coupled to the second cutter.

In addition, the outer case 150, that is, the first body 160 and the second body 170 may be provided with tension portions 151 on both sides to effectively remove the pressure in the vertical direction. The tension unit 151 is formed of two upper and lower plastic plates having through holes and relatively thin elasticity and deforms from the upper pressure of the outer case 150. When the pressure is removed, Is returned.

The embodiments of the vibrating linear actuator of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. It will be possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100, 200: actuator 110: solenoid coil
111: hollow 120: first vibrator
121, 131: Vibration axes 122, 132: Extension bars
130: second vibrator 140: fixed case
142: through hole 150: outer case
151: Tension part 152: Strip spring
152e: connection hole 153: flange
160: first body 170: second body

Claims

A solenoid coil 110 in which a coil is wound around a center core 112 having a hollow 111 formed therein and an AC power is applied thereto,
A first oscillation shaft 121 inserted into the hollow 111 and an extension bar 122 extending from the first oscillation shaft 121 and the extension bar 122 and connected to the first body 160 A first vibrator 120 having a fixing bar 123 fixed to the first vibrator 120,
A second oscillation axis 131 inserted into the hollow 111 and spaced apart from the first oscillation axis 121, an extension bar 132 extending to the second oscillation axis 131, A second vibrator 130 connected to the extension bar 132 and having a fixing bar 123 fixed to the second body 170; And
An outer case 150 having a first body 160 and a second body 170 spaced apart from the first body 160;
Wherein the vibrating linear actuator includes:
The outer case 150 is provided with a strip spring 152 having an elastic force projected to contact the extension bars 122 and 132 of the vibrators 120 and 130,
The strip spring (152)
First and fourth strip springs 152a and 152d coupled to the upper side of the flange 153 extending upward from the lower end of the outer case 150,
A second strip spring 152b extending from the first body 160,
And a third strip spring 152c extending from the second body 170,
Wherein the strip spring (152) is formed with a connection hole (152e) penetrating therethrough.

The method according to claim 1,
The first vibration axis 121 is formed in a conical shape,
Wherein a space is formed in the second vibration axis (131) so as to accommodate the conical shape of the first vibration axis (121).

The method according to claim 1,
The first and second vibrating shafts 121 and 131 are formed of a steel material so as to receive the solenoid coil 110 and prevent leakage of magnetic flux generated from the solenoid coil 110. The first and second vibrating shafts 121 and 131, A fixing case 140 in which a through hole 142 is formed to be inserted into the hollow 111;
Further comprising:

delete

The method according to claim 1,
Wherein the first body (160) and the second body (170) are provided with a tension portion (151) for efficiently removing pressure in a vertical direction.