JP5540249B1 - Vibration device and electronic device - Google Patents

Abstract

An object of the present invention is to provide a vibration device that can be miniaturized in a plan view and an electronic apparatus using the vibration device.
A drive shaft 22 that slightly vibrates in the axial direction in a reciprocating asymmetric manner, a fine vibration generating member 20 that finely vibrates the drive shaft 22 having one end connected in a reciprocating asymmetric manner in the axial direction, and the drive shaft 22 or the fine vibration generating member. A housing 12 that supports at least one of 20 so that the drive shaft 22 can freely vibrate in the axial direction, and the drive shaft 22 that can move in the axial direction of the drive shaft 22 by reciprocating asymmetrical fine vibration of the drive shaft 22. A collision member 24 to be coupled, and the collision member 24 moves on the drive shaft 22 to collide with a collision target 26 provided in the housing 12, thereby generating vibration in the housing 26.
[Selection] Figure 1

Description

  The present invention relates to a vibration device used for input devices such as a touch panel and an electronic device using the vibration device.

  Conventionally, a display device incorporating a touch panel function and an input device using operation keys have been introduced. Among these, the vibration device is built in beforehand, and when the operator inputs information by pressing with a finger or a pen, the feeling that the vibration is returned to the finger or the pen and the operation is performed reliably is operated. There is something to give to the person. As such a vibration device, for example, in Patent Document 1, a piezoelectric actuator having one end fixed to a pedestal and a weight at the other end of the piezoelectric actuator via a damper are provided. As a result, the vibration device can be thinned.

JP 2011-245437 A

However, although the thickness of the vibration device of Patent Document 1 is certainly thin, a weight with a length of several tens of mm is necessary to obtain a predetermined vibration, and it is difficult to reduce the size in plan view. there were.
The present invention solves the above-described conventional problems, and an object thereof is to provide a vibration device and an electronic device using the vibration device that can be reduced in size in plan view.

In order to achieve the above object, the present invention provides a drive shaft that slightly vibrates axially in a reciprocating asymmetric manner, a fine vibration generating member that finely vibrates the drive shaft in a reciprocating asymmetric manner in the axial direction, and the drive A housing that supports at least one of the drive shaft or the fine vibration generating member so that the shaft can freely vibrate in the axial direction, and moves in the axial direction of the drive shaft by a reciprocating asymmetrical fine vibration of the drive shaft. A collision member that can be coupled to the drive shaft, and the collision member moves on the drive shaft and collides with a collision target provided on the housing, thereby generating vibration in the housing. It is characterized by.
With this configuration, the intended purpose can be achieved.

  According to the present invention, the drive shaft that slightly vibrates in the axial direction in a reciprocating asymmetric manner, the fine vibration generating member that finely vibrates in the axial direction in the axial direction the reciprocating asymmetric drive shaft, and the drive shaft in the axial direction. A housing that supports at least one of the drive shaft or the micro-vibration generating member so as to be free to vibrate; and the drive shaft that is movable in the axial direction of the drive shaft by reciprocating asymmetrical micro-vibration of the drive shaft; A collision member to be coupled, and the collision member moves on the drive shaft and collides with a colliding portion provided in the casing, thereby generating vibration in the casing. Since the member collides at high speed with a collision target provided in the casing, it is possible to generate a large vibration in the casing. The vibration generated in the housing is transmitted to an electronic device equipped with a vibration device. Therefore, a large vibration can be obtained without increasing the size of the collision member, and the effect of reducing the size of the vibration device in plan view can be obtained.

It is a longitudinal cross-sectional view which shows the structure of the vibration apparatus of Embodiment 1 of this invention. It is a figure which shows the example of the drive voltage waveform of the vibration apparatus of Embodiment 1 of this invention, and the position of a collision member. It is a longitudinal cross-sectional view which shows the structure of the vibration apparatus of Embodiment 2 of this invention. It is a figure which shows the example of the drive voltage waveform of the vibration apparatus of Embodiment 2 of this invention, and the position of a collision member. It is a longitudinal cross-sectional view which shows the structure of the vibration apparatus of Embodiment 3 of this invention. It is a figure which shows the example of the drive voltage waveform of the vibration apparatus of Embodiment 3 of this invention, and the position of a collision member. It is a see-through | perspective perspective view which shows the other shape 1 of the housing | casing of the vibration apparatus of Embodiment 1-3 of this invention. It is a see-through | perspective perspective view which shows the other shape 2 of the housing | casing of the vibration apparatus of Embodiment 1-3 of this invention. It is a longitudinal cross-sectional view which shows the structure of the vibration apparatus of Embodiment 4 of this invention. It is the figure seen from the lower part which shows the example of the shape relationship between the housing | casing of the vibration apparatus of Embodiment 4 of this invention, and a fine vibration generation member.

The invention according to claim 1 of the present invention includes a drive shaft that vibrates slightly in the axial direction,
A fine vibration generating member that finely vibrates the drive shaft connected at one end in the axial direction;
A housing that supports at least one of the drive shaft or the fine vibration generating member such that the drive shaft is capable of fine vibration in the axial direction;
A collision member coupled to the drive shaft so as to be movable in the axial direction of the drive shaft by a slight vibration of the drive shaft;
It is a vibration device that generates vibration in the casing when the collision member moves on the drive shaft and collides with a collision target provided in the casing.
Since the collision member collides with a collision target provided in the housing at a high speed, a large vibration can be generated in the housing. The vibration generated in the housing is transmitted to an electronic device equipped with a vibration device. Therefore, a large vibration can be obtained without increasing the size of the collision member, and the effect of reducing the size of the vibration device in plan view can be obtained.

According to a second aspect of the present invention, in the first aspect of the invention, the fine vibration generating member is configured such that the elastic thin plate is expanded and contracted by applying a driving voltage to the elastic thin plate disposed on at least one surface of the elastic thin plate, so that the central portion And the peripheral portion are vibration devices that are thin plates that are deformed so as to be relatively displaced in the normal direction of the elastic thin plate.
Since the fine vibration generating member is a thin plate, the vibration device itself can be thinned.

According to a third aspect of the present invention, in the second aspect of the present invention, the fine vibration generating member is a vibration device supported by the casing only through the drive shaft.
Since the fine vibration of the fine vibration generating member is transmitted to the drive shaft without being absorbed by other members, the amount of fine vibration of the drive shaft can be increased.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the fine vibration generating member is a vibration device in which a peripheral portion is fixed to the housing at equal intervals in the circumferential direction with points.
Since the fine vibration generating member is directly fixed to the casing, stable driving can be obtained.

A fifth aspect of the present invention is the vibration device according to the first aspect of the present invention, wherein at least one of the collision member or the collided portion protrudes toward a facing counterpart.
Since the moving distance of the collision member is short, the driving of the collision member becomes easy. Further, when the collision member protrudes, a larger vibration can be given to the casing because the collision member is heavy.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the housing includes wall surfaces facing both surfaces of the collision member, and the collision target portion is provided on each of the wall surfaces, and the collision member is It is a vibration device that collides with the colliding part in both reciprocation.
Since it collides with reciprocation, vibration can be generated efficiently.

The invention according to claim 7 is the heat shrinkable resin according to claim 1, wherein the collision member has a through hole through which the drive shaft is inserted, and a gap between the through hole and the drive shaft is thermally contracted. And the collision member is engaged with the drive shaft by the heat shrinkage force of the heat shrinkable resin.
The structure is simple and the number of parts can be reduced. Further, since the entire periphery of the drive shaft can be made uniform, the drive shaft can be arranged at the center of the collision member, and can be finished in a symmetrical shape.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the driving voltage waveform for moving the collision member in the axial direction of the drive shaft moves the collision member from a reference position toward the collision target. The time to be set is set to move a first distance that is longer than the distance between the collision member and the colliding part at the reference position, and the collision member moves the set first distance. It is a vibration apparatus which collides with the said to-be-collised part without.
A collision member can be made to collide with a to-be-collised part reliably.

According to a ninth aspect of the present invention, in the sixth aspect of the present invention, the drive voltage waveform for moving the collision member in the axial direction of the drive shaft is different from the position where the collision member is brought into contact with one of the collision target portions. The time for moving toward the collided portion is set to move a second distance longer than the distance between the colliding member that contacts the one collided portion and the other collided portion. The collision member is a vibration device that collides with the other colliding part without moving the set second distance.
A collision member can be made to collide with a to-be-collised part reliably.

According to a tenth aspect of the present invention, in the first aspect of the present invention, the driving voltage waveform for moving the collision member in the axial direction of the drive shaft is a sensor that detects a collision of the collision member with the collision target portion. The vibration device is set such that the moving direction of the collision member is reversed based on the signal.
Since the collision direction is detected and the moving direction is reversed, the collision member can be reliably collided with the colliding part.

An eleventh aspect of the invention is an electronic apparatus including the vibration device according to the first aspect.
Since the collision member collides with a collision target provided in the housing at a high speed, a large vibration can be generated in the housing. The vibration generated in the housing is transmitted to an electronic device equipped with a vibration device. Therefore, a large vibration can be obtained without enlarging the collision member, and the size of the vibration device in a plan view can be reduced, so that the electronic device can be reduced in size.

(Embodiment 1)
Hereinafter, the vibration device according to the first embodiment of the present invention will be described with reference to the drawings. In the drawings, description will be made with the upper side of the paper as the upper side and the lower side as the lower side. A vibration device 10 shown in FIG. 1 is used in an electronic device such as an electronic device in which a touch panel function is incorporated in a display device or an input device using operation keys. In these electronic devices, the vibration device 10 is incorporated in advance, and when the operator inputs information by pressing with a finger or a pen, the vibration is returned to the finger or the pen and the operation is performed reliably. There is something that gives the operator a feeling.

  As shown in FIG. 1, the vibration device 10 according to the first embodiment includes a driving shaft 22 that vibrates in a reciprocating asymmetric manner in the axial direction and a driving shaft 22 that is connected at one end. The vibration generating member 20, the housing 12 that supports the drive shaft 22 so that the drive shaft 22 can freely vibrate in the axial direction, and the reciprocating asymmetrical fine vibration of the drive shaft 22 can move in the axial direction of the drive shaft 22. And a collision member 24 coupled to the drive shaft 22. The vibration device 10 causes the housing 12 to vibrate when the collision member 24 moves on the drive shaft 22 and collides with a collision target 26 provided in the housing 12.

  As will be described later, when a predetermined drive voltage is applied to the fine vibration generating member 20, the drive shaft 22 slightly vibrates in a reciprocating asymmetric manner, and the collision member 24 rises for each stroke of the fine vibration and is provided in the housing 12. It collides at a high speed with the hit part 26. Due to this collision, a large vibration is generated in the housing 12, and this vibration is transmitted to the electronic device and further transmitted to the operator, so that the operator can feel that the operation has been performed reliably.

  The vibration device 10 can be configured to have a size of several mm square to 1 cm square × several mm height, and a large vibration can be obtained without enlarging the collision member 24. Therefore, the effect that the vibration device 10 in a plan view can be reduced in size is obtained.

Hereinafter, the configuration of the vibration device 10 according to the first embodiment will be described in detail.
As shown in FIG. 1, the housing 12 is formed of a material such as a metal or an alloy so that vibration and impact can be easily transmitted. The housing 12 is formed such that the upper wall 12b protrudes from the upper end of the side wall 12a and the lower wall 12c opposite to the upper wall 12b protrudes from the lower end of the side wall 12a. A through hole 12d is formed in the upper wall 12b, and a through hole 12e is formed in the lower wall 12c. The drive shaft 22 is inserted into the through holes 12d and 12e via rubber bushes 28 and 28. Therefore, a line connecting the centers of the through holes 12d and 12e is provided so as to be perpendicular to the upper wall 12b and the lower wall 12c. Further, a collision target portion 26 protruding from the periphery is provided on the lower surface of the upper wall 12b. The colliding part 26 may be provided on the upper surface of the lower wall 12c, or may be provided separately as will be described later. Moreover, the colliding part 26 does not need to protrude.

  The drive member 14 that moves the collision member 24 includes a fine vibration generating member 20 and a drive shaft 22. The fine vibration generating member 20 applies a driving voltage to the stretchable thin plate 16 disposed on at least one surface of the elastic thin plate 18 so that the stretchable thin plate 16 expands and contracts so that the central portion and the peripheral portion are relative to the normal direction of the elastic thin plate 18. It is a thin plate that deforms so as to be displaced. In the first embodiment, the fine vibration generating member 20 is a so-called unimorph type in which the elastic thin plate 16 is disposed on one surface of the elastic thin plate 18.

  The stretchable thin plate 16 is composed of a piezoelectric material or an electrostrictive material in which electrode materials are attached to both surfaces. For example, copper or copper alloy is used as the electrode material. Examples of piezoelectric materials and electrostrictive materials include lead zirconate titanate, barium titanate, and lead magnesium niobate. The stretchable thin plate 16 is formed in a circular shape or a polygonal shape.

  The elastic thin plate 18 is made of an elastic material such as copper or copper alloy. The elastic thin plate 18 preferably has an outer shape corresponding to the elastic thin plate 16 when the elastic thin plate 16 as shown in FIG. 1 is provided on one side of the elastic thin plate 18, but it does not need to correspond. The elastic thin plate 16 is fixed to the elastic thin plate 18 with, for example, a conductive adhesive, and wiring for applying a voltage to the elastic thin plate 16 is provided on each of both surfaces of the fine vibration generating member 20. The wiring is connected to the drive control unit 30.

  The drive shaft 22 is made of, for example, a carbon-based material that is lightweight and has high rigidity, and is formed in a column shape. The drive shaft 22 is fixed to the fine vibration generating member 20 at the shaft tip. In the first embodiment, the shaft tip portion has the same thickness as the shaft center portion, but the shaft tip portion may have a smaller diameter than the shaft center portion. In addition, the drive shaft 22 is configured to fix the tip surface of the shaft tip portion to the surface of the fine vibration generating member 20 (with an adhesive). However, the through hole is provided in the fine vibration generating member 20 and the side surface portion of the shaft tip portion is provided. It is good also as a structure which fixes.

  The drive shaft 22 is supported by a rubber bush 28 so as to be freely vibrated. The rubber bush 28 is an elastic member for supporting the drive shaft 22 and has a center hole for inserting the drive shaft 22. The rubber bush 28 disposed in the through hole 12d adheres and fixes the tip of the drive shaft 22 opposite to the side fixed to the fine vibration generating member 20 on the inner surface of the center hole. However, the rubber bush 28 disposed in the through-hole 12e does not fix the drive shaft 22 on the inner surface of the center hole, but only supports the pressure from the outside. With this configuration, the drive shaft 22 slightly vibrates in the axial direction, but the drive shaft 22 itself does not move a long distance like the collision member 24 due to the fine vibration.

  The collision member 24 has a relatively large mass in order to give vibration energy to the housing 12 by the collision. In order to reduce the size, the vibrating member 24 is made of a material having a high density, such as a tungsten alloy. The vibration member 24 has a circular or polygonal outer shape, and has a through hole 24a through which the drive shaft 22 is inserted at the center. The clearance between the through-hole 24a and the drive shaft 22 is filled with a heat-shrinkable heat-shrinkable resin 25 as a friction coupling portion with the drive shaft 22, and the heat-shrink force of the heat-shrinkable resin 25 (the drive shaft 22 is placed outside). The collision member 24 is engaged with the drive shaft 22 by the friction force applied from the first to the second shaft.

  The drive control unit 30 applies a drive voltage having a predetermined waveform to the stretchable thin plate 16. The drive control unit 30 applies a rectangular wave having a frequency of about several tens of kHz, a sawtooth wave, a triangular wave having a rising time and a falling time differently to the telescopic thin plate 16, and moves the vibrating member 24 toward the collision target 26. . Then, when the vibration member 24 collides with the colliding part 26, the drive voltage waveform is changed and applied to the stretchable thin plate 16 so that the moving direction of the vibration member 24 is reversed. In the first embodiment, triangular waves having different rise times and fall times as shown in FIG. 2 are used.

  Next, a method for manufacturing the vibration device 10 according to the first embodiment will be described. First, the fine vibration generating member 20 is manufactured by fixing the stretchable thin plate 16 having electrodes formed on both sides thereof to the elastic thin plate 18 with a conductive adhesive or the like. Next, the drive shaft 22 is fixed to the fine vibration generating member 20 to obtain the drive member 14. Next, the drive shaft 22 is inserted into the through hole 12 e of the housing 12, the through hole 24 a of the collision member 24, and the through hole 12 d of the housing 12 and supported by the rubber bush 28, and the collision member 24 is made of the heat-shrinkable resin 25. Is engaged with the drive shaft 22. In addition, wiring is provided from both surfaces of the fine vibration generating member 20 and connected to the drive control unit 30.

Next, the operation of the vibration device 10 according to the first embodiment will be described.
When the drive voltage rises, the stretchable thin plate 16 extends in the thickness direction and shrinks in the in-plane direction. However, since the elastic thin plate 18 does not expand and contract in such a manner, the fine vibration generating member 20 is displaced upward in the center portion and the peripheral edge portion is expanded. Deforms to displace downward. The drive shaft 22 fixed to the central portion of the fine vibration generating member 20 also moves upward, and the collision member 24 engaged with the drive shaft 22 also moves upward. When the drive voltage reaches the predetermined voltage Vd, the drive voltage rapidly falls, and the deformation of the microvibration generating member 20 also rapidly returns. As a result, the drive shaft 22 also returns to its original position, but the collision member 24 does not follow the downward movement of the drive shaft 24 and remains in that position. As a result, the collision member 24 moves slightly upward. The reciprocating asymmetric axial movement of the drive shaft 22 causes the collision member 24 to move upward by 1 to several μm per reciprocation. As described above, this operation is repeated at a frequency of several tens of kHz.

  As shown in FIG. 2, the drive voltage waveform for moving the collision member 24 in the axial direction of the drive shaft 22 indicates that the time for moving the collision member 24 from the reference position in the direction approaching the collision target 26 is equal to the collision member at the reference position. The first distance L1 longer than the distance D1 between 24 and the colliding part 26 is set to move. The collision member 24 collides with the colliding part 26 without moving the set first distance L1.

  That is, the collision member 24 collides with the colliding part 26 when it moves by the distance D1 from the reference position, but it takes time to move the first distance L1 while maintaining the drive voltage waveform as it is. Continue to apply. Then, when the time required to move the first distance L1 is reached, the drive voltage waveform is changed so that the collision member 24 moves downward, and the collision member 24 is applied only for the time to return the distance D1. When the time for the collision member 24 to return to the distance D1 comes, the application is performed for such a time that the collision member 24 again moves the first distance L1 upward. After the collision member 24 collides with the colliding part 26, the collision member 24 remains in contact with the colliding part 26 until the drive voltage waveform is changed so that the collision member 24 moves downward. By repeating this, the collision member 24 repeatedly collides with the colliding part 26, and feels as vibration to the operator.

  As described above, the vibration device 10 according to the first embodiment can obtain a large vibration without increasing the size of the collision member 24, and the effect that the vibration device 10 can be downsized in a plan view is obtained. Moreover, since the fine vibration generating member 20 is a thin plate, the vibration device 10 itself can also be thin. The fine vibration generating member 20 is supported by the housing 12 only via the drive shaft 22. Therefore, the minute vibration of the minute vibration generating member 20 is transmitted to the drive shaft 22 without being absorbed by other members such as the housing 12, so that the amount of minute vibration of the drive shaft 22 can be increased. Moreover, the colliding part 26 protrudes toward the collision member 24 which is the other party facing. Therefore, the movement distance of the collision member 24 is short by the amount of protrusion. Then, for example, the amount of axial movement of the drive shaft 22 that is asymmetrical in the reciprocal direction can be reduced, and the drive voltage Vd can be lowered accordingly, so that the collision member 24 can be driven easily.

  Further, the collision member 24 has a through hole 24a through which the drive shaft 22 is inserted, and a gap between the through hole 24a and the drive shaft 22 is filled with a heat-shrinkable heat-shrinkable resin 25 so that the heat-shrinkable resin 25 is thermally shrunk. The collision member 24 is frictionally engaged with the drive shaft 22 by force. Therefore, the structure is simple and the number of parts can be reduced. Moreover, since the whole periphery of the drive shaft 22 can be made into a uniform structure, the drive shaft 22 can be arranged in the center of the collision member 24 and can be finished in a symmetrical shape.

  The drive voltage waveform for moving the collision member 24 in the axial direction of the drive shaft 22 is such that the time during which the collision member 24 moves from the reference position in the direction approaching the collision target 26 is equal to the collision member 24 and the collision target 26 at the reference position. The first distance L1 that is longer than the distance D1 is set to move. Therefore, the collision member 24 collides with the colliding part 26 without moving the set first distance L1. Therefore, the collision member 24 can be made to collide with the colliding part 26 reliably.

(Embodiment 2)
Next, a vibration device according to Embodiment 2 of the present invention will be described with reference to the drawings. In addition, about the part which has the structure similar to Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 3, the vibration device 10 according to the second embodiment is configured such that the housing 12 has wall surfaces facing both surfaces of the collision member 24. The impacted portion 26 is provided on each of the lower wall surface of the upper wall 12b and the upper wall surface of the lower wall 12c, so that the collision member 24 collides with the impacted portion 26 in both reciprocations.

  In the first embodiment, the collided portion 26 protrudes toward the colliding member 24. However, in the second embodiment, the collided portion 26 that is the opposite side that the outer peripheral portion of the colliding member 24 faces. It protruded toward. The protruding portions are provided on both surfaces of the collision member 24 because the colliding portions 26 are on both surfaces of the collision member 24.

  As shown in FIG. 4, in the second embodiment, the driving voltage waveform for moving the collision member 24 in the axial direction of the drive shaft 22 is different from the position where the collision member 24 is in contact with one collision target portion 26. The time to move toward the collision part 26 is set to move a second distance L2 that is longer than the distance D2 between the collision member 24 that abuts the one collision target part 26 and the other collision target part 26. . The collision member 24 collides with the other colliding part 26 without moving the set second distance L2.

  The distance D2 is also the distance between the collision member 24 and the colliding part 26 at the reference position. In this case, the reference position is a position where the collision member 24 is in contact with one of the collision target members 26. That is, when the collision member 24 moves from the reference position by the distance D2, the collision member 24 collides with the other collision target portion 26, but the time required to move the second distance L2 while maintaining the drive voltage waveform as it is. Continue applying until it comes. After the collision member 24 collides with the other colliding part 26, the collision member 24 remains in contact with the other colliding part 26 until the driving voltage waveform is changed so that the collision member 24 moves downward. .

  When the time required to move the second distance L2 is reached, the drive voltage waveform is changed so that the collision member 24 moves downward, and the collision member 24 is applied only for the time when the collision member 24 returns the second distance L2. When the collision member 24 moves downward by a distance D2, it collides with one colliding part 26, but the drive voltage waveform is maintained as it is, and the application is continued until the time required to move the second distance L2 is reached. . After the collision member 24 collides with one collided portion 26, the colliding member 24 remains in contact with one collided portion 26 until the drive voltage waveform is changed so that the colliding member 24 moves upward. .

  When the time for the collision member 24 to return to the second distance L2 is reached, the drive voltage waveform is changed so that the collision member 24 moves upward again, and the collision member 24 is applied for such a time as to move the second distance L2 upward. By repeating this, the collision member 24 repeatedly collides with the one and the other collided portions 26, and the operator feels vibration.

  In the vibration device 10 according to the second embodiment, since the collision member 24 reciprocally collides with the collision target portion 26, vibration can be generated efficiently. The driving voltage waveform is determined based on the time when the collision member 24 is moved from the position where the collision member 24 is in contact with the one collision target portion 26 toward the other collision target portion 26 and the collision member 24 which is in contact with the one collision target portion 26 and the other. The second distance L2 that is longer than the distance D2 between the first and second collision parts 26 is set to move. Therefore, the collision member 24 collides with the other colliding part 26 without moving the set second distance L2. Therefore, the collision member 24 can be made to collide with the colliding part 26 reliably.

  Moreover, since the collision member 24 protrudes toward the colliding part 26 which is the opposite party that faces, the movement distance of the collision member 24 is short and the driving of the collision member 24 becomes easy. Further, since the collision member 24 is heavier than in the case of a simple flat plate shape, stronger vibration can be applied to the housing 12. Particularly in the case of the second embodiment, since the projecting portions are provided on both surfaces, the collision member 24 is heavier and stronger vibration can be applied to the housing 12. Moreover, since the peripheral part of the collision member 24 is a protruding part, the weight of the collision member 24 can be increased efficiently, but a position closer to the center part may be used as the protruding part. Moreover, since the collision member 24 is manufactured by casting, sintering, etc., and the protruding portion can be manufactured at the same time, it can be manufactured more easily than providing the protruding portion on the housing 12.

(Embodiment 3)
Next, a vibration device according to Embodiment 3 of the present invention will be described with reference to the drawings. In addition, about the part which has the structure similar to Embodiment 1, 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The vibration device 10 according to the third embodiment is an example in which modifications are combined.

  As shown in FIG. 5, in the vibration device 10 according to the third embodiment, the driving voltage waveform for moving the collision member 24 in the axial direction of the drive shaft 22 detected the collision of the collision member 24 with the collision target portion 26. The moving direction of the collision member 24 is set to be reversed based on the signal from the sensor 32.

In the second embodiment, the sensor 32 includes a piezoelectric sensor or the like that can detect a collision in a part of the colliding part 26.
Further, the colliding part 26 is provided separately from the housing 12. For example, the main body of the housing 12 can be made of a material that can be easily formed into a desired shape, and the impacted portion 26 can be selectively used as a material that can well transmit the impact from the collision member 24 to the housing 12.
The fine vibration generating member 20 is a so-called bimorph type. That is, the fine vibration generating member 20 applies a driving voltage to the stretchable thin plate 16 disposed on both surfaces of the elastic thin plate 18 so that the stretchable thin plate 16 expands and contracts so that the central portion and the peripheral portion are in the normal direction of the elastic thin plate 18. It is a thin plate that is deformed so as to be relatively displaced.
Further, the drive shaft 22 is bonded and fixed to the lower surface of the rubber bush 28 provided in the through hole 12d of the upper wall 12b of the housing 12 on the end surface opposite to the side fixed to the fine vibration generating member 20. In the third embodiment, the rubber bush 28 does not have a center hole. Further, the rubber bush 28 is not provided on the lower wall 12c, and the drive shaft 22 only passes through the through hole 12e.
The drive voltage waveform for moving the collision member 24 in the axial direction of the drive shaft 22 in the vibration device 10 of the third embodiment is based on the signal of the sensor 32 that detects the collision of the collision member 24 with the collision target 26. The moving direction of the member 24 was set to be reversed.

As shown in FIG. 6, the drive control unit 30 first applies a first drive voltage to the lower telescopic thin plate 16 in FIG. Then, the collision member 24 at the reference position rises, moves the distance D3, and collides with the upper collision target portion 26. When the collision member 24 comes to the position of the upper collision target 26, the upper sensor 32 detects the first trigger. The first driving voltage is stopped by the first trigger, and the second driving voltage for driving the upper telescopic thin plate 16 is applied. Since the second drive voltage has the same waveform as the first drive voltage, the upper telescopic thin plate 16 expands and contracts the same as the lower telescopic thin plate 16 to which the first drive voltage is applied. Then, deformation is performed in the opposite direction to the case where the first drive voltage is applied. Therefore, the collision member 24 descends, moves the distance D3, and collides with the lower collision target portion 26. When the collision member 24 comes to the position of the lower collision target 26, the lower sensor 32 detects it and generates a second trigger. The second drive voltage is stopped by the second trigger, and the first drive voltage for driving the lower stretchable thin plate 16 is applied. Therefore, the collision member 24 rises again.
Since the collision is detected and the moving direction is reversed, the collision member 24 can be reliably caused to collide with the colliding part 26.

  As in the first and second embodiments, after the collision is detected, a predetermined time, the number of micro vibrations, and the like may be further applied in the same direction, and then the direction of movement may be reversed. . Furthermore, the collision member 24 can be made to collide with the colliding part 26 reliably.

  In the third embodiment, the sensor 32 is a piezoelectric sensor, but may be a magnetic sensor such as an MR sensor or a Hall sensor, and may be disposed at a predetermined position of the housing 12 corresponding to the collision target 26. The scale 34 corresponding to the sensor 32 has a magnetic scale in which two magnetic poles are arranged in the axial direction of the drive shaft 22 so that the collision member 24 faces the sensor 32 when the collision member 24 collides with the colliding part 26. Place on the side. An optical position sensor may be used.

Note that the housing 12 in the first to third embodiments can be formed by bending a single plate. At this time, the through holes 12d and 12e may be provided in advance, or may be provided after the shape of the housing 12 is formed. However, the housing 12 can be formed in other shapes.
For example, as shown in FIG. 7, the casing 12 may be formed in a box shape without a bottom, and one side wall 12a may be cut open and bent to be parallel to the upper wall 12b to form the lower wall 12c. Separate through holes 12d and 12e are provided. With such a shape, the rigidity of the housing 12 can be made larger than that of the housing 12 described in the first to third embodiments. Therefore, the vibration transmitted from the vibration device 10 to the electronic device can be increased. Can do. At that time, it is preferable to cut away unnecessary portions as shown by broken lines to form openings 12f. Since the vibration device 10 can be reduced in weight and components such as the collision member 24 can be easily accommodated in the housing 12, it is easy to assemble.

  Further, for example, as shown in FIG. 8, the housing 12 may have a box shape similar to that of FIG. 7, the opposing side walls 12a may be cut open, and each may be bent to be parallel to the upper wall 12b to form the lower wall 12c. At that time, the lower walls 12c of the respective lower walls 12c are made to substantially come into contact with each other before being opened. Alternatively, the lower wall 12c of each lower wall 12c before opening may be cut out and bent to form the through hole 12e. The through hole 12d is formed separately. Moreover, it is preferable to provide the opening 12f as in FIG. When the box shape is manufactured, the end of the side wall 12a is cut out and bent, so that the through hole 12e can be formed at the same time, so that the manufacturing is easy.

(Embodiment 4)
Next, a vibration device according to Embodiment 4 of the present invention will be described with reference to the drawings. In addition, about the part which has the structure similar to Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted. As shown in FIG. 9, in the vibration device 10 according to the fourth embodiment, the fine vibration generating member 20 is fixed to the housing 12 at equal intervals in the circumferential direction at the periphery.

  The housing 12 has a box shape without a bottom portion, and a through hole 12d is formed on the upper wall 12b to support the drive shaft 22 so that the drive shaft 22 can be finely oscillated by arranging a rubber bush 28. Further, the lower end portion 12g of the side wall 12a is provided with the inner peripheral edge one step higher than the outer peripheral edge, and serves as a fixing portion 12h of the fine vibration generating member 20.

  The fine vibration generating member 20 has a peripheral edge portion 20a fixed to a fixing portion 12h of the housing 12 at a point (small area). In the fourth embodiment, as shown in FIG. 10A, the casing 12 is rectangular when viewed from below, and the micro-vibration generating member 20 has four portions of the peripheral portion 20a on the fixed portion 12h of the casing 12. It was a circular shape that could be placed slightly. Further, as shown in FIG. 9, the peripheral edge portion 20a is formed by projecting the elastic thin plate 18 to the outer peripheral side of the elastic thin plate 16, and the elastic thin plate 18 is on the upper side and the elastic thin plate 16 is on the lower side. It was attached to the fixed part 12h. Thus, by extending the outer side of the stretchable thin plate 16 and the elastic thin plate 18 fixed to the fixing portion 12h of the housing 12 to the outer side as the peripheral portion 20a, electrical wiring can be facilitated. it can.

  Since the fine vibration generating member 20 is directly fixed to the housing 12, the driving member 14 can be driven stably. In addition, since the peripheral portion 20a is fixed not at the whole point but at a point, the amount of the fine vibration generated by the fine vibration generating member 20 is not absorbed by the housing 12, and the driving ability of the driving member 14 is large.

  Further, as shown in FIG. 9, by making the step of the fixing portion 12 h deeper than the thickness of the fine vibration generating member 20, the fine vibration generating member 20 does not protrude from the lower end portion 12 g of the case 12. Therefore, during assembly of the vibration device 10, the fine vibration generating member 20 is not easily broken by an external force after assembly.

  Further, the colliding part 26 is provided not only on the upper wall 12b of the housing 12, but also on the upper surface side of the fine vibration generating member 20, so that the collision member 24 collides in a reciprocating manner. Since it collides with reciprocation, vibration can be generated efficiently. Moreover, since the mass of the area | region near the peripheral part 20a of the fine vibration generation member 20 is large, the drive capability which the fine vibration generation member 20 generate | occur | produces can be enlarged.

  There are other combinations of the shapes of the casing 12 and the fine vibration generating member 20 of the vibration device 10 of the fourth embodiment. For example, in FIG. 10B, the housing 12 has a circular shape and the minute vibration generating member 20 has a quadrangular shape, contrary to FIG. 10A. In FIG. 10C, the housing 12 and the minute vibration generating member 20 are both rectangular. In this case, the peripheral edge 20 a of the square corner of the fine vibration generating member 20 is placed on the fixed part 12 h of the square side of the housing 12. In FIG. 10D, the casing 12 is octagonal and the micro-vibration member 20 is quadrangular. You may consider that the corner | angular part of the square housing | casing 12 of FIG.10 (c) was a chamfered shape. Therefore, the housing 12 may not be an octagon but a rounded rectangle. FIG. 10E shows a case where the fine vibration generating member 20 shown in FIG. 10D has a circular shape. FIG. 10 (f) shows a case where the fine vibration generating member 20 has a hexagonal shape instead of a circular shape or a rectangular shape. Such a shape may be used. As described above, the housing 12 and the fine vibration generating member 20 can be combined in various shapes.

  Although not shown in FIG. 9, an opening 12 f as shown in FIGS. 7 and 8 may be provided in the side wall 12 a of the housing 12. In addition, although the shape of the housing 12 of the fourth embodiment is a box shape, it may be formed by bending a single plate as in the first embodiment.

  In the first to fourth embodiments of the present invention, the fine vibration generating member 20 is a unimorph or bimorph type, but is not limited thereto, and a so-called laminated type may be used. Since it can drive with a small drive voltage, the drive control part 30 can be made cheap.

DESCRIPTION OF SYMBOLS 10 Vibration apparatus 12 Housing | casing 12a Side wall 12b Upper wall 12c Lower wall 12d, 12e Through-hole 12f Opening 12g Lower end part 12h Fixed part 14 Drive member 16 Telescopic thin plate 18 Elastic thin plate 20 Slight vibration generating member 20a Peripheral part 22 Drive shaft 24 Collision member 24a Through-hole 25 Heat-shrinkable resin 26 Collision part 28 Rubber bush 30 Drive control part 32 Sensor

Claims (11)

A drive shaft that vibrates slightly in the axial direction;
A fine vibration generating member that finely vibrates the drive shaft connected at one end in the axial direction;
A housing that supports at least one of the drive shaft or the fine vibration generating member such that the drive shaft is capable of fine vibration in the axial direction;
A collision member coupled to the drive shaft so as to be movable in the axial direction of the drive shaft by a slight vibration of the drive shaft;
A vibration device, wherein the collision member generates vibration in the casing by moving on the drive shaft and colliding with a collision target provided in the casing. The fine vibration generating member applies a driving voltage to an elastic thin plate disposed on at least one surface of the elastic thin plate, whereby the elastic thin plate expands and contracts, and a central portion and a peripheral portion are relatively displaced in a normal direction of the elastic thin plate. The vibration device according to claim 1, wherein the vibration device is a thin plate that deforms like this. The vibration device according to claim 2, wherein the minute vibration generating member is supported by the housing only through the drive shaft. The vibration device according to claim 2, wherein the fine vibration generating member is fixed to the housing at a peripheral portion at equal intervals in a circumferential direction. 2. The vibration device according to claim 1, wherein at least one of the collision member and the collision target portion protrudes toward the opposing side. The said housing | casing has a wall surface which faces each both surfaces of the said collision member, The said collision part is provided in each of the said wall surface, The said collision member collides with the said collision part both reciprocatingly. 1. The vibration device according to 1. The collision member has a through-hole through which the drive shaft is inserted, and a gap between the through-hole and the drive shaft is filled with a heat-shrinkable heat-shrinkable resin, and the collision with the heat-shrinkable force of the heat-shrinkable resin. The vibration device according to claim 1, wherein a member is engaged with the drive shaft. The driving voltage waveform for moving the collision member in the axial direction of the drive shaft is such that the time for moving the collision member from the reference position in a direction approaching the collision target is the collision member and the collision target at the reference position. And the collision member collides with the colliding part without moving the set first distance. 1. The vibration device according to 1. The driving voltage waveform for moving the collision member in the axial direction of the drive shaft is such that the time for moving the collision member from the position in contact with one of the collision target parts toward the other collision target part is It is set to move a second distance that is longer than the distance between the collision member that comes into contact with the collided portion and the other collided portion, and the colliding member moves the set second distance. The vibration device according to claim 6, wherein the vibration device collides with the other collision target portion. The drive voltage waveform for moving the collision member in the axial direction of the drive shaft is set so that the movement direction of the collision member is reversed based on a signal of a sensor that detects the collision of the collision member with the collision target portion. The vibration device according to claim 1, wherein An electronic apparatus comprising the vibration device according to claim 1.

Images