KR20160096484A - Vibrator - Google Patents

Abstract

Disclosed is a vibration generation device. The vibration generation device includes a housing having an internal space, a vibration member which includes first and second vibration members which are fixed to both ends of the housing, first and second piezoelectric parts which are installed in the first and second vibration members, a weight body case which is connected to the upper surface of the vibration member, and a weight body which is connected to the vibration member and vibrates by interlocking with the vibration member. So, the generation of a distortion mode can be reduced.

Description

Vibration generator {Vibrator}

The present invention relates to a vibration generating apparatus.

A touch screen for directly touching a screen is generally adopted in a manner that a button is installed around a screen in an electronic device requiring a recent screen.

In addition, touch screens that are limited to mobile phones and small electronic devices are expanding to large-sized IT devices and large-screen devices.

Therefore, in order to allow the user to feel vibration feedback even better on a large screen, a vibration generator having a large vibration force and a quick response characteristic is required.

Further, it is necessary to develop a new structure of a vibration generator capable of generating a large vibration using a piezoelectric element.

Korean Patent Laid-Open Publication No. 2012-0011306

There is provided a vibration generating device capable of reducing occurrence of a warping mode.

A vibration generating apparatus according to an embodiment of the present invention includes a housing having an inner space, an oscillating member having first and second oscillating members whose both ends are fixed to the housing, A weight case connected to the upper surface of the vibrating member, and a weight connected to the vibrating member and vibrating in conjunction with the vibrating member.

The occurrence of the warping mode can be reduced.

1 is an exploded perspective view showing a vibration generating device according to an embodiment of the present invention.
2 is a perspective view showing an oscillating member of a vibration generating device according to an embodiment of the present invention.
3 is a bottom perspective view showing a vibrating part of a vibration generating device according to an embodiment of the present invention.
4 is a bottom view showing a vibrating part of a vibration generating device according to an embodiment of the present invention.
5 is a perspective view showing a first modified embodiment of the vibration member.
6 is an exploded perspective view showing a vibration generator according to another embodiment of the present invention.
7 is a bottom perspective view showing a vibration part of a vibration generating device according to another embodiment of the present invention.
8 is an exploded perspective view showing a vibration generating apparatus according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

1 is an exploded perspective view showing a vibration generating device according to an embodiment of the present invention.

1, a vibration generating apparatus 100 according to an embodiment of the present invention includes a housing 110, a vibration member 120, a first piezoelectric element 130, a second piezoelectric element 140, A weight member 150, a weight member 160, a damper member 170, and a flexible circuit board 180. [

The housing 110 forms an outer shape of the vibration generating device 100 and has an inner space such that the vibration member 120, the first and second piezoelectric elements 130 and 140, the weight 160, .

To this end, the housing 110 may have a box-shaped case 112 having an inner space and a lower end opened, and a bracket 114 assembled to the lower end of the case 112.

Meanwhile, the case 112 may have a rectangular parallelepiped shape, and the bracket 114 may have a plate shape. That is, the bracket 114 is assembled to the lower end of the case 112 to form the housing 110.

In this embodiment, the housing 110 has a rectangular parallelepiped shape. However, the housing 110 is not limited to the rectangular parallelepiped shape.

In addition, a lead-out groove 112a for drawing out the circuit board 140 may be formed at one end surface of the case 112. [

The bracket 114 is formed with a joint portion 114a to which both end portions of the vibration member 120 are joined.

Both ends of the vibration member 120 are fixed to the housing 110. For example, both ends of the vibration member 120 are joined to the joint portion 114a of the bracket 114. However, the present invention is not limited thereto, and the vibration member 120 may be attached to the case 112.

Both side surfaces of the vibrating member 120 may be disposed side by side with respect to both sides of the weight 160 or protrude from both sides of the weight 160. Details of this will be described later.

2 is a perspective view showing an oscillating member of a vibration generating apparatus according to an embodiment of the present invention.

The vibration member 120 includes a first vibration member 122 on which the first piezoelectric element 130 (see FIG. 1) is installed and a second vibration member 124 on which the second piezoelectric element 140 (see FIG. 2) .

2, the first oscillating member 122 includes a first piezoelectric element mounting portion 122a on which the first piezoelectric element 130 is mounted and a second piezoelectric element mounting portion 122b on the first piezoelectric element mounting portion 122a. And a first vibrating part 122b connected to both ends.

Meanwhile, the first piezoelectric element mounting portion 122a and the first vibrating portion 122b may be made of different materials. For example, the first vibration portion 122b may be made of a material having a higher tensile strength than the first piezoelectric element mounting portion 122a.

The first piezoelectric element 130 may be bonded to the first piezoelectric element mounting portion 122a via a thermosetting adhesive. A grid-like lattice portion (not shown) may be formed in the first piezoelectric-element-attaching portion 122a to increase the coupling force with the first piezoelectric-element 130.

Further, on both sides of the first piezoelectric element mounting portion 122a, a supporting portion 122c for supporting both side surfaces of the first piezoelectric element 130 is formed when the first piezoelectric element 130 is assembled. The supporting portion 122c guides the mounting position of the first piezoelectric element 130 and prevents the adhesive applied to the first piezoelectric element mounting portion 122a from leaking to the outside.

In addition, the first piezoelectric element mounting portion 122a can be made of a material having a low coefficient of thermal expansion to prevent the first piezoelectric element mounting portion 122a from being deformed by heat applied during curing of the thermosetting adhesive.

The first vibration section 122b is made of a material having a higher tensile strength than the first piezoelectric element installation section 122a as described above. Thus, breakage of the first vibration portion 122b during vibration can be prevented.

On the other hand, the first piezoelectric element mounting portion 122a and the first vibrating portion 122b may be bonded by at least one of welding and bonding.

The second oscillating member 124 also has a second piezoelectric element mounting portion 124a on which the second piezoelectric element 140 is mounted and a second oscillating portion 124a connected to both ends of the first piezoelectric element mounting portion 124a 124b.

On the other hand, the second piezoelectric element mounting portion 124a and the second vibration portion 124b may be made of different materials. For example, the second vibrating portion 124b may be made of a material having a higher tensile strength than the second piezoelectric element attaching portion 124a.

The second piezoelectric element 140 can be bonded to the second piezoelectric element mounting portion 124a via a thermosetting adhesive. A grid-like lattice portion (not shown) for increasing the coupling force with the second piezoelectric element 140 may be formed on the second piezoelectric-element-mounting portion 124a.

Further, on both sides of the second piezoelectric element mounting portion 124a, a support portion 124c for supporting both side surfaces of the first piezoelectric element 140 is formed when the second piezoelectric element 140 is assembled. The supporting portion 124c guides the mounting position of the second piezoelectric element 140 and prevents the adhesive applied to the second piezoelectric element mounting portion 124a from leaking to the outside.

In addition, the second piezoelectric element mounting portion 124a may be made of a material having a low coefficient of thermal expansion to prevent the second piezoelectric element mounting portion 124a from being deformed by heat applied during curing of the thermosetting adhesive.

The second vibrating portion 124b is made of a material having a higher tensile strength than the second piezoelectric element mounting portion 124a. Thus, breakage of the second vibration section 124b during vibration can be prevented.

On the other hand, the second piezoelectric element mounting portion 124a and the second vibration portion 124b may be bonded by at least one of welding and bonding.

Hereinafter, the first and second piezoelectric elements, the weight case and the weight will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a bottom perspective view showing a vibrating part of a vibration generating device according to an embodiment of the present invention, and FIG. 4 is a bottom view showing a vibrating part of the vibration generating device according to an embodiment of the present invention.

Here, the vibrating portion refers to a structure that vibrates in conjunction with the vibrating member 120 according to the deformation of the first and second piezoelectric elements 130 and 140. The vibrating portion includes the vibrating member 120, the first and second piezoelectric elements 130 and 140, Body case 150 and heavy body 160, respectively.

Referring to FIGS. 3 and 4, the first piezoelectric element 130 is installed on the bottom surface of the vibration member 120. That is, as described above, the first piezoelectric element 130 is attached to the bottom surface of the first piezoelectric element mounting portion 122a of the first vibrating member 122. At this time, the first piezoelectric element 130 is installed on the first piezoelectric element mounting portion 122a via a thermosetting adhesive in a state where both side surfaces are supported by the first supporting portion 122c.

On the other hand, the main electrode 132 formed of a pair of electrodes on the bottom surface of the first piezoelectric element 130 and the spare electrode 134 formed of an electrode pair and spaced apart from the main electrode 132 are formed.

The first piezoelectric element 130 may be deformed even if only one of the main electrode 132 and the spare electrode 134 is connected to an external power source.

The second piezoelectric element 140 is provided on the bottom surface of the vibration member 120 like the first piezoelectric element 130. That is, as described above, the second piezoelectric element 140 is attached to the bottom surface of the first piezoelectric element mounting portion 124a of the second oscillating member 124. [ At this time, the second piezoelectric element 140 is installed on the second piezoelectric element mounting portion 124a via a thermosetting adhesive in a state where both side surfaces are supported by the second supporting portion 124c.

On the bottom surface of the second piezoelectric element 140, on the other hand, a main electrode 142 composed of electrode pairs and a spare electrode 144 composed of electrode pairs and spaced from the main electrode 142 are formed.

The second piezoelectric element 140 may be deformed even when only one of the main electrode 142 and the auxiliary electrode 144 is connected to an external power source.

Since the main electrodes 132 and 142 and the auxiliary electrodes 134 and 144 are provided in the first and second piezoelectric elements 130 and 140 so that even if cracks are generated in the first and second piezoelectric elements 130 and 140, Power can be supplied through the power supply lines 134 and 144. As a result, it is possible to prevent the reduction of the effective electrode surface due to the cracks and to prevent the reduction of the vibration amount.

The weight case 150 is provided on the upper surface of the vibration member 120. That is, the weight case 150 serves to connect the first and second vibration members 122 and 124.

The weight case 150 includes a connecting portion 152 joined to the first and second vibrating members 122 and 124 and a connecting portion 152 extending from both sides of the connecting portion 152 and joined to both sides of the weight 160 , See Fig. 1).

The connecting portion 152 is provided on the upper surfaces of the first and second piezoelectric element mounting portions 122a and 124a and is provided in the width direction of the first and second piezoelectric element mounting portions 122a and 124a. Connect the 1,2 swinging members (122, 124).

1, the longitudinal direction means the X direction in FIG. 1, the width direction means the Y direction in FIG. 1, and the thickness direction means the Z direction in FIG.

The joining portion 154 has a shape corresponding to both sides of the weight 160 and is installed on the joining portion 154 of the weight 160 so that the weight 160 and the vibrating member 120 can be connected have.

Accordingly, the weight 160 can be vibrated in conjunction with the vibration member 120 to increase the amount of vibration.

 The weight 160 is connected to the vibration member 120 through the weight case 150 and is oscillated in conjunction with the vibration member 120. On the other hand, the weight 160 has, for example, a length in the width direction equal to the width direction of the vibration member 120.

One side of the weight 160 is disposed parallel to one side of the first vibrating member 122 and the other side of the weight 160 is disposed on the other side of the second vibrating member 124. [ Respectively.

Accordingly, the eccentricity of the weight 160 can be removed to prevent the distortion.

That is, in order to increase the vibration amount, when the weight of the weight 160 is increased so that the width of the weight 160 is wider than the width of the vibration member 120, . In other words, the weight 160 is vibrated in the width direction by the eccentricity of the weight 160.

As a result, an abnormal vibration occurs in which a distortion occurs.

However, since both side surfaces of the vibration member 120 are disposed in parallel to both side surfaces of the weight member 160, the eccentricity of the weight member 160 can be removed to prevent the distortion member.

The width of the vibration member 120 may be greater than the width of the weight 160 and the width of the vibration member 120 may be slightly shorter than the width of the weight 160. [ .

That is, the width direction length of the vibration member 120 may have a width direction length that can prevent the occurrence of the warping mode.

Hereinafter, description will be made again with reference to FIG.

Referring to FIG. 1, a damper member 170 is installed at both ends of the inner surface of the case 112 to prevent contact with the weight 160. The damper member 170 may be made of a material having elasticity. Since the damper member 160 is installed in the case 112 so that the weight 160 is abutted against the damper member 170 during abnormal vibration of the weight 160, noise is generated and damage to the housing 110 is prevented. .

Although the damper member 170 is provided at both ends of the case 112 in the present embodiment, the damper member 170 may be formed on the bottom surface of the vibration member 120, the upper surface of the bracket 114, Location.

The flexible circuit board 180 is connected to the first and second piezoelectric elements 130 and 140 to supply power to the first and second piezoelectric elements 130 and 140.

On the other hand, the flexible circuit board 180 can be drawn out from the housing 110 through the lead-out hole 112a of the case 112 at one end.

The flexible printed circuit board 180 includes a first substrate 182 connected to the first piezoelectric element 130 and a second substrate 182 disposed adjacent to the first substrate 182 and connected to the second piezoelectric element 140. [ (184).

The first substrate 182 and the second substrate 184 may be integrally formed, or separately formed.

A main electrode connection terminal 182a and a spare electrode connection terminal 182b connected to the main electrode 132 and the spare electrode 134 of the first piezoelectric element 130 are formed on the first substrate 182 .

A main electrode connection terminal 184a and a spare electrode connection terminal 184b connected to the main electrode 142 and the auxiliary electrode 144 of the second piezoelectric element 140 are formed on the second substrate 184 .

As described above, since both side surfaces of the vibration member 120 are arranged in parallel to both sides of the weight 160, the eccentricity of the weight 160 can be removed to prevent the distortion.

Hereinafter, modifications of the vibration member will be described with reference to the drawings.

5 is a bottom view showing a first modified embodiment of the vibration member.

5, the vibration member 220 includes a first vibration member 222 on which the first piezoelectric element 130 (see FIG. 1) is installed and a second vibration member 222 on which the second piezoelectric element 140 2 vibrating member 224. The vibrating member 224 is a vibrating member.

The vibrating member 220 may further include a connecting portion 226 connecting both ends of the first and second vibrating members 222 and 224. That is, the first and second vibrating members 222 and 224 are connected to each other through the connecting portion 226 and may be integrally formed. The first oscillating member 222 and the second oscillating member 224 are spaced apart from each other by a predetermined distance.

Accordingly, one side surface of the first oscillating member 222 and the other side surface of the second oscillating member 224 are disposed in parallel to both sides of the weight 160 (see FIG. 4).

As a result, the eccentricity of the weight 160 can be removed to prevent the vibration member 220 from being warped.

However, the length in the width direction from one side of the first oscillating member 222 to the other side of the second oscillating member 224 may have a length in the width direction that can eliminate the eccentricity of the weight 160.

In other words, the length in the width direction from one side of the first vibrating member 222 to the other side of the second vibrating member 224 may be greater than the length in the width direction of the weight 160, The width direction of the first and second electrodes may be smaller than the width direction of the second electrode.

As described above, since the first and second vibrating members 222 and 224 are spaced apart from each other so as to remove the eccentricity of the weight 160, the occurrence of the warping mode can be prevented.

In addition, since the vibrating member 220 is formed of a single plate, the manufacturing yield can be improved and the manufacturing cost can be reduced.

Hereinafter, a vibration generator according to another embodiment of the present invention will be described with reference to the drawings. However, the same components as those described above are denoted by the same reference numerals as used above, and a detailed description thereof will be omitted and the above description will be omitted.

FIG. 6 is an exploded perspective view showing a vibration generating apparatus according to another embodiment of the present invention, and FIG. 7 is a bottom perspective view showing a vibration part of a vibration generating apparatus according to another embodiment of the present invention.

6 and 7, a vibration generator 300 according to another embodiment of the present invention includes a housing 110, a vibration member 120, a first piezoelectric element 130, a second piezoelectric element 130, A damper member 170, a flexible circuit board 180, and a joining member 390. The weight member 160 may be made of a metal such as aluminum.

On the other hand, the housing 110, the vibration member 120, the first piezoelectric element 130, the second piezoelectric element 140, the weight 160, the damper member 170, The same components as those of the vibration generating apparatus 100 according to the embodiment of the present invention are replaced with the above description, and a detailed description thereof will be omitted here.

The weight body (350) is provided with a weight (160). The weight case 350 includes a connecting portion 352 formed to enclose the first and second vibrating members 122 and 124 and a connecting portion 352 extending from both sides of the connecting portion 352 and joined to both sides of the weight 160. [ (354).

The connection portion 352 includes a first connection portion 352a extending in the thickness direction from the junction portion 354 and a second connection portion 352b connecting the first connection portion 352a. On the other hand, the second connecting portion 352b is disposed below the first and second oscillating members 122 and 124. [

That is, the second connecting portion 352b is not fixed to the first and second vibrating members 122 and 124 but simply contacts the first and second vibrating members 122 and 124 or is spaced apart from the first and second vibrating members 122 and 124.

The joining portion 354 has a shape corresponding to both side surfaces of the weight 160 and is attached to both sides of the weight 160. At this time, the joint 354 and the weight 160 can be bonded by bonding.

The joining member 390 serves to connect the vibrating member 120 and the weight 160. That is, the joining member 390 is disposed between the upper surface of the vibration member 120 and the bottom surface of the weight 160 to bond the vibration member 120 and the weight 160 together.

For this purpose, the joining member 390 may be made of a double-sided tape as an example.

The first and second vibrating members 122 and 124 are connected to the weight 160 through the joint member 390 so that the first and second vibrating members 122 and 124 can be vibrated in conjunction with the weight 160 .

8 is an exploded perspective view showing a vibration generating apparatus according to another embodiment of the present invention.

8, a vibration generating apparatus 400 according to another embodiment of the present invention includes a housing 110, a vibration member 420, a first piezoelectric element 130, a second piezoelectric element 140 A weight member 350, a weight 160, a damper member 170, a flexible circuit board 180, and a joining member 390. As shown in FIG.

The housing 110, the first piezoelectric element 130, the second piezoelectric element 140, the weight 160, the damper member 170, and the flexible circuit board 180 are the same as those of the first embodiment The same reference numerals are used for the same components as those of the vibration generating apparatus 100 according to the first embodiment.

The weight case 350 and the joining member 390 are the same as those of the vibration generating device 300 according to another embodiment of the present invention. It will be omitted.

The vibrating member 420 includes a first piezoelectric element mounting portion 422 on which the first piezoelectric element 130 is mounted and a second piezoelectric element mounting portion 424 disposed on the first piezoelectric element mounting portion 422, And a vibration plate 426 connected to both ends of the first and second piezoelectric element mounting portions 422 and 424 and having an end fixed to the housing 110.

The vibrating plate 426 includes a first vibrating part 426a connected to the first piezoelectric element mounting part 422 and a second vibrating part 426b connected to the second piezoelectric element mounting part 424, And a connecting portion 426c connecting the end portions of the first and second vibrating portions 426a and 426b.

That is, both ends of the vibrating plate 426 may be integrally formed by being connected through a connecting portion 426c.

Supporting portions 422a and 424a for supporting the first and second piezoelectric elements 130 and 140 are formed on both sides of the first and second piezoelectric element mounting portions 422 and 424, respectively.

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, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100, 300, 400: Vibration generator
110: Housing
120, 220, 420:
130: first piezoelectric element
140: second piezoelectric element
150, 350: Weight case
160: Weight
170: damper member
180: Flexible circuit board
390:

Claims (18)

A housing having an inner space;
An oscillating member having first and second oscillating members whose both ends are fixed to the housing;
First and second piezoelectric elements provided on the first and second vibrating members;
A weight case connected to the vibration member; And
A weight installed in the weight case and vibrating in conjunction with the vibration member;
And a vibration generator.
The method according to claim 1,
Wherein the first and second oscillating members are spaced apart from each other.
3. The method of claim 2,
Wherein one side surface of the first oscillating member and the other side surface of the second oscillating member are disposed side by side with respect to both sides of the weight or protruded from both sides of the weight.
The method of claim 3,
Wherein the first oscillating member comprises a first piezoelectric element mounting portion in which the first piezoelectric element is mounted and a first oscillating portion connected to both end portions of the first piezoelectric element mounting portion,
And the second oscillating member comprises a second piezoelectric element mounting portion in which the second piezoelectric element is mounted and a second oscillating portion connected to both end portions of the second piezoelectric element mounting portion.
The method of claim 3,
Wherein the first and second vibrating members are connected by the weight case.
6. The method of claim 5,
Wherein the weight case includes a connecting portion joined to the first and second vibrating members, and a joining portion extending from both sides of the connecting portion and joined to both sides of the weight.
The method according to claim 1,
Wherein the first and second piezoelectric elements have a main electrode on a bottom surface and a spare electrode spaced apart from the main electrode.
8. The method of claim 7,
And a flexible circuit board connected to the first and second piezoelectric elements.
The method according to claim 1,
Wherein the housing has a plate-shaped bracket having projections to which both ends of the vibrating member are joined, and a case having the bracket assembled at a lower end thereof and having an inner space,
Wherein the vibration member is fixed to at least one of the bracket and the case.
10. The method of claim 9,
And damper members for preventing contact with the weight are provided at both ends of the inner surface of the case.

A housing having an inner space;
A first oscillating member having both ends fixed to the housing;
A second oscillating member having both ends fixed to the housing and spaced apart from the first oscillating member;
A first piezoelectric element provided on the first oscillating member;
A second piezoelectric element provided on the second oscillating member;
A weight case connected to the first and second vibrating members;
A weight installed on the weight case and vibrating in conjunction with the first and second vibrating members;
/ RTI >
Wherein a length in a width direction from one side of the first oscillating member to the other side of the second oscillating member has a length that prevents warping deformation.
A housing having an inner space;
An oscillating member whose both ends are fixed to the housing;
First and second piezoelectric elements provided on the vibrating member;
A weight case connected to the vibration member; And
A weight installed in the weight case and vibrating in conjunction with the vibration member;
/ RTI >
The vibrating member includes a first piezoelectric element mounting portion provided with a first piezoelectric element, a second piezoelectric element mounting portion disposed apart from the first piezoelectric element mounting portion, and a second piezoelectric element mounting portion connected to both ends of the first and second piezoelectric element mounting portions, And an oscillating plate having an end fixed to the housing.
13. The method of claim 12,
The vibrating plate includes a first vibrating portion connected to the first piezoelectric element mounting portion, a second vibrating portion connected to the second piezoelectric element mounting portion, and a connecting portion connecting the end portions of the first and second vibrating portions Vibration generating device.
13. The method of claim 12,
Wherein a supporting portion for supporting the first and second piezoelectric elements is formed on both side surfaces of the first and second piezoelectric element mounting portions.
13. The method of claim 12,
Wherein the weight case includes a connection portion formed to surround the first and second vibration members, and a joint portion extending from both side surfaces of the connection portion and joined to both sides of the weight.
16. The method of claim 15,
And the weight member and the vibration member are connected through a joining member.
13. The method of claim 12,
Wherein the weight case includes a connecting portion joined to the first and second vibrating members, and a joint portion extending from both sides of the connecting portion and joined to both sides of the weight.
13. The method of claim 12,
Wherein one side surface of the first oscillating member and the other side surface of the second oscillating member are arranged side by side or both side surfaces of the weight member.

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