JP2015075856A - Tactile sense presentation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tactile sense presentation device capable of transmitting a strong vibration to some extent even when a piezoelectric film is used.SOLUTION: A drive part applies a drive signal to piezoelectric films 20A, 20B. Since the piezoelectric film 20A is attached to a back surface of an exciter film 30, the back surface side of the exciter film 30 contracts at this place accompanied with a contraction of the piezoelectric film 20A as shown in an arrow S911. At this time, the exciter film 30 is slightly bent to a front surface side among directions orthogonal to a main surface. On the other hand, since the piezoelectric film 20B is attached to the front surface of the exciter film 30, the front surface side of the exciter film 30 contracts at this place accompanied with the contraction of the piezoelectric film 20B as shown in an arrow S915. At this time, the exciter film 30 is slightly bent to the back surface side among the directions orthogonal to the main surface.

Description

  The present invention relates to a haptic presentation device that provides haptic feedback by transmitting vibration to a user.

  In recent years, in touch panel type keyboards and the like, a tactile sensation presentation device has been proposed that gives tactile feedback by transmitting vibrations when a user touches a key and feels the key “pressed”.

  For example, Patent Document 1 describes a structure in which both ends of a piezoelectric bimorph element made of piezoelectric ceramics or the like are held by a low elastic body, and a vibrating material is connected to the center of the piezoelectric bimorph. In the structure of Patent Document 1, vibration is transmitted to a user through a connected vibration-receiving material by inputting an AC signal to the piezoelectric bimorph element and causing it to vibrate.

  However, there is a problem that piezoelectric ceramics are easily broken. On the other hand, a material that is difficult to break, such as a piezoelectric film, has a weak force to transmit vibration and is difficult to use for a tactile sense presentation device.

JP 2005-303937 A

  If a piezoelectric film is attached to a flat plate and the flat plate is vibrated, the flat plate is curved, so that sound is generated from the flat plate. The tactile sensation presentation device is intended to transmit vibration to the user, and it is preferable to suppress the generation of sound due to vibration.

  Therefore, an object of the present invention is to provide a tactile sensation that can transmit a strong vibration to some extent even when a piezoelectric film is used, and can suppress generation of sound from the flat plate even when it is attached to the flat plate. It is to provide a presentation device.

  The tactile presentation device according to the present invention includes a piezoelectric film made of a piezoelectric resin having electrodes formed on both main surfaces, a flat exciter film on which the piezoelectric film is mounted, and the exciter film in a state where bending stress is generated. A plate-shaped diaphragm fixed to the touch panel, a touch detection unit that detects a touch operation, and a drive unit that applies a drive signal to the piezoelectric film when the touch detection unit detects the touch operation. The piezoelectric film has a first piezoelectric film mounted on one main surface of the exciter film, and a second piezoelectric film mounted on the other main surface of the exciter film, and the first piezoelectric film And the second piezoelectric film is mounted so that there is a portion that does not overlap each other when the exciter film is viewed in plan view. To.

  In such a tactile sense presentation device, when a user performs a touch operation, a drive signal is applied to the piezoelectric film, and the piezoelectric film expands and contracts. When the piezoelectric film expands and contracts, the exciter film expands and contracts. The diaphragm vibrates in a direction orthogonal to the main surface by expansion and contraction of the exciter film. Since the bending stress is generated in the diaphragm, it can be efficiently vibrated with respect to expansion and contraction of the piezoelectric film. Therefore, the tactile sense presentation device of the present invention can transmit a strong vibration to some extent even when a piezoelectric film is used.

  The exciter film is mounted so that a plurality of piezoelectric films (first piezoelectric film and second piezoelectric film) do not overlap each other on both main surfaces. The direction in which the exciter film is deformed by expansion and contraction of the first piezoelectric film is opposite to the direction in which the exciter film is deformed by expansion and contraction of the second piezoelectric film. Therefore, the sound generated when the exciter film expands and contracts is opposite in phase between the place where the first piezoelectric film is attached and the place where the second piezoelectric film is attached, and these sounds cancel each other and are reduced. It will be.

  The first piezoelectric film and the second piezoelectric film may be attached to both main surfaces of one exciter film, but the first exciter film to which the first piezoelectric film is attached and the second piezoelectric film are attached. You may divide | segment into a 2nd exciter film.

  On the other hand, the tactile sense presentation device may be configured as follows. That is, the tactile sense presentation device of the present invention includes a piezoelectric film made of a piezoelectric resin having electrodes formed on both main surfaces, a flat exciter film on which the piezoelectric film is mounted, and a bending stress in a state where bending stress is generated. A flat diaphragm fixed to an exciter film; a touch detection unit that detects a touch operation; a drive unit that applies a drive signal to the piezoelectric film when the touch detection unit detects a touch operation; A support member that supports the diaphragm, and the support member supports the diaphragm at at least two locations other than an edge of the diaphragm.

  The support member supports the diaphragm in contact with the ground surface on which the tactile sense presentation device is installed. When the diaphragm vibrates, the support member moves in a direction parallel to the ground plane, but hardly moves in the normal direction. Therefore, the vibration plate moves in the opposite direction between the inside portion and the outside (edge side) portion of the support member in plan view. Therefore, sound of opposite phase is generated at the inner portion and the outer (edge side) portion of the support member, which cancel each other and reduce.

  In addition, the aspect which detects the touch operation with respect to a diaphragm may be sufficient as a touch detection part, and the aspect which detects the touch with respect to the touchscreen with which a diaphragm is mounted | worn may be sufficient.

  In addition, the diaphragm may be in a state in which bending stress is generated by being fixed to the exciter film while being curved in a direction orthogonal to the main surface of the exciter film, or in a state where the diaphragm is not fixed to the exciter film The flat plate surface may have a curved shape, and a bending stress may be generated by being fixed to the exciter film so that the curved flat plate surface is flat.

  The piezoelectric resin can be made of polyvinylidene fluoride or a chiral polymer. In particular, when the chiral polymer is polylactic acid, a tactile sensation presentation device that has a high translucency when viewed from the front can be realized by using a material having translucency together with other components.

  According to the present invention, even if a piezoelectric film is used, strong vibrations can be transmitted to some extent, and generation of sound can be suppressed even when the piezoelectric film is attached to a flat plate.

1 is an external perspective view of a tactile presentation device 10. FIG. It is the front view and side view of the tactile sense presentation device 10. 2 is a partially enlarged side view of the tactile sense presentation device 10. FIG. 1 is a block diagram illustrating a configuration of a tactile sense presentation device 10. FIG. 10 is an operation explanatory diagram of the tactile presentation device 10. It is an external appearance perspective view of 10 A of tactile sense presentation apparatuses. It is structure explanatory drawing of 10 A of tactile sense presentation apparatuses. It is the back view and back perspective view of tactile sense presentation apparatus 10B. It is the rear view and back perspective view of 10 C of tactile sense presentation apparatuses. It is a back perspective view of tactile sense presentation device 10D. It is operation | movement explanatory drawing of the tactile sense presentation apparatus 10D. It is a back perspective view of tactile sense presentation device 10E. It is sectional drawing of the piezoelectric film which concerns on a modification.

  FIG. 1 is an external perspective view of a tactile presentation device 10 according to the first embodiment. FIG. 2A is a front view of the tactile sense presentation device 10, and FIG. 2B is a side view.

  The tactile sense presentation device 10 includes a piezoelectric film 20A, a piezoelectric film 20B, an exciter film 30, a diaphragm 40, and a touch panel 50. The tactile sense presentation device 10 is a so-called keyboard, and a flat touch panel 50 is provided with a plurality of touch sensors 80 at positions corresponding to the key arrangement. The touch sensor 80 corresponds to the touch detection unit of the present invention. The touch sensor 80 may be of any type as long as it has a function of detecting a user's touch operation, and various types such as a membrane type, a capacitance type, and a piezoelectric film type may be used.

  The touch panel 50 is attached to one main surface (front surface) of the flat diaphragm 40. The diaphragm 40 has a rectangular shape in plan view. The diaphragm 40 has both ends in the short direction fixed to the exciter film 30 on the other main surface (back surface). The diaphragm 40 is made of, for example, acrylic resin PMMA. The diaphragm 40 may be made of other materials such as a metal plate, PET, polycarbonate (PC), PLLA, and glass.

  Note that the touch panel 50 is not essential. For example, a plurality of touch sensors 80 may be provided on the front surface of the diaphragm 40 at positions corresponding to the key arrangement.

  The exciter film 30 has a rectangular shape in plan view like the diaphragm 40. The exciter film 30 is made of, for example, polyethylene terephthalate (PET). The exciter film 30 may use other materials such as polyethylene nanophthalate (PEN), polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC). Further, the same material as that of the piezoelectric film 20 may be used. The thickness of the exciter film 30 is desirably a thickness that does not hinder stretchability (for example, about 0.02 to 0.5 mm).

  In the exciter film 30, the piezoelectric film 20B is mounted on the main surface (front surface) on which the diaphragm 40 is mounted, and the piezoelectric film 20A is mounted on the main surface (back surface) opposite to the side on which the diaphragm 40 is mounted. Has been. One of the piezoelectric film 20A and the piezoelectric film 20B corresponds to the first piezoelectric film of the present invention, and the other corresponds to the second piezoelectric film. The piezoelectric film 20 </ b> A and the piezoelectric film 20 </ b> B are divided with respect to the center position in the short direction of the exciter film 30 so as not to overlap each other in plan view. The piezoelectric film 20 </ b> A and the piezoelectric film 20 </ b> B only need to have a portion that does not overlap with each other when seen in a plan view, and may have an aspect in which a part thereof overlaps.

  As shown in the partially enlarged side view of the tactile sense presentation device 10 in FIG. 3, the piezoelectric film 20 </ b> A has a rectangular base film 200 in plan view and electrodes 201 </ b> A formed on both opposing main surfaces of the base film 200. And an electrode 201B. Since the piezoelectric film 20A and the piezoelectric film 20B are the same, the piezoelectric film 20B also has the same structure and the same function.

  The base film 200 is a piezoelectric resin, and for example, a material such as polyvinylidene fluoride (PVDF) or a chiral polymer is used. More preferably, polylactic acid (PLA) having high translucency is used. In particular, it is desirable to be made of PLLA. In the case of using PLA, the tactile sensation presentation device 10 having a high translucency in almost the entire front view can be realized by using a material having a high translucency in other configurations.

  When the base film 200 is composed of PLLA, as shown in FIG. 2 (A), by cutting each outer periphery to be approximately 45 ° with respect to the stretching direction, a rectangular shape is formed, Give piezoelectricity.

  The electrode 201 </ b> A and the electrode 201 </ b> B are formed on substantially the entire main surfaces of the base film 200. The electrode 201A and the electrode 201B are preferably composed mainly of indium tin oxide (ITO), zinc oxide (ZnO), and polythiophene. In addition, it is also possible to use a silver nanowire electrode for the electrode 201A and the electrode 201B, and it is preferable to use an aluminum vapor-deposited electrode as long as the light transmitting property may be low. A lead wiring conductor (not shown) is connected to the electrode 201A and the electrode 201B, and a drive signal is applied to the electrode 201A and the electrode 201B through the wiring conductor. The electrode 201 </ b> A disposed on the exciter film 30 side is attached to the exciter film 30 via the adhesive layer 60.

  As shown in FIG. 4, when the user touches the touch sensor 80 provided on the touch panel 50, the drive unit 81 applies drive signals to the electrodes 201A and 201B of the piezoelectric film 20A and the piezoelectric film 20B. Thereby, the piezoelectric film 20A and the piezoelectric film 20B expand and contract.

  As shown in FIG. 1 and FIG. 2B, the diaphragm 40 is curved to the opposite side (front side of the diaphragm 40) with respect to the side where the exciter film 30 exists (the back side of the diaphragm 40). It is fixed to the exciter film 30 so as to have a protruding shape. With this configuration, a hollow region 100 is formed between the diaphragm 40 and the exciter film 30. And the side with this diaphragm 40 becomes the front side of the tactile sense presentation device 10, and the side with the exciter film 30 becomes the back side of the tactile sense presentation device 10.

  However, in the present embodiment, the curved state of the diaphragm 40 is exaggerated for the sake of explanation, and actually, the main surface of the diaphragm 40 and the main surface of the exciter film 30 are more nearly parallel. The hollow region 100 is desirably as small as possible.

  Thus, since the vibration plate 40 is fixed to the exciter film 30 with the flat plate surface curved, the vibration film 40 is applied to the exciter film 30 in a state where bending stress is applied as indicated by the white arrow F901 in FIG. Fixed. Further, the exciter film 30 is in a state in which a tensile force is applied in the short direction of the main surface of the exciter film 30 as indicated by the white arrow S901 in FIG.

  FIG. 5 is an operation explanatory diagram of the tactile sense presentation device 10, and FIG. 5 (A) shows a state at a timing when the piezoelectric film 20A and the piezoelectric film 20B are contracted by the drive signal. FIG. 5B shows a state where no drive signal is applied or the amplitude of the drive signal is zero. FIG. 5C shows a state at the timing when the piezoelectric film 20A and the piezoelectric film 20B are extended by the drive signal.

  When the drive unit 81 applies a drive signal to the piezoelectric film 20A and the piezoelectric film 20B and applies an electric field in the first direction of the piezoelectric film 20A and the piezoelectric film 20B, as shown in FIG. The piezoelectric film 20 </ b> B contracts along a direction orthogonal to the fixed ends of the vibration plate 40 and the exciter film 30.

  Since the piezoelectric film 20A is attached to the back surface of the exciter film 30, the back side of the exciter film 30 contracts at this location as the piezoelectric film 20A contracts as indicated by arrow S911. At this time, the exciter film 30 is slightly curved toward the front side in the direction orthogonal to the main surface.

  On the other hand, since the piezoelectric film 20B is attached to the front surface of the exciter film 30, the front side of the exciter film 30 contracts at this location as the piezoelectric film 20B contracts as indicated by arrow S915. At this time, the exciter film 30 is slightly curved toward the back side in the direction orthogonal to the main surface.

  Since the exciter film 30 as a whole contracts, the vibration plate 40 is pulled in the central direction from a fixed portion (an end portion in the short direction) with the exciter film 30. Thereby, the diaphragm 40 is curved so as to protrude further forward as indicated by an arrow F911 in FIG.

  On the other hand, when the drive unit 81 applies a drive signal to the piezoelectric film 20 and applies an electric field in the second direction opposite to the first direction, the piezoelectric film 20A vibrates as shown in FIG. The plate 40 and the exciter film 30 extend along a direction perpendicular to the fixed ends. Since the piezoelectric film 20A is attached to the back surface of the exciter film 30, the back side of the exciter film 30 expands at this location with the expansion of the piezoelectric film 20A indicated by the arrow S912. At this time, the exciter film 30 is slightly curved toward the back side in the direction orthogonal to the main surface.

  In addition, since the piezoelectric film 20B is attached to the front surface of the exciter film 30, the front side of the exciter film 30 expands at this location as the piezoelectric film 20B indicated by the arrow S917 expands. At this time, the exciter film 30 is slightly curved toward the front side in the direction orthogonal to the main surface.

  Then, the diaphragm 40 is pulled from a central direction to a place (an end portion in the short direction) fixed to the exciter film 30. Thereby, as shown by arrow F912 in FIG. 5C, diaphragm 40 is in a curved state in which the amount of forward protrusion is reduced.

  Therefore, the vibration plate 40 changes to the state shown in FIG. 5A or the state shown in FIG. 5C based on the state shown in FIG. It vibrates along the direction (direction orthogonal to the main surface of the diaphragm 40). Thereby, the vibration according to the drive signal is transmitted to the touch panel 50 via the diaphragm 40 and transmitted to the user who touched the touch panel 50. Therefore, when the user touches the touch sensor 80 of the touch panel 50, the vibration is fed back, so that the user can feel that the key is “pressed”.

  Since a stationary bending stress is applied to the vibration plate 40 in a non-operating state, the force applied to the vibration plate 40 when the piezoelectric film 20A, the piezoelectric film 20B, and the exciter film 30 are extended is the bending force. The same direction as the stress. Therefore, the tactile sense presentation device 10 can vibrate the diaphragm 40 efficiently and can transmit a strong vibration to some extent even when a piezoelectric film is used. In addition, the tactile sense presentation device 10 can be made thinner than vibration caused by a motor or the like.

  Further, the exciter film 30 has a reverse direction in which the piezoelectric film 20A is attached and the place where the piezoelectric film 20B is attached. Therefore, the sound generated when the exciter film 30 expands and contracts is opposite in phase between the place where the piezoelectric film 20A is attached and the place where the piezoelectric film 20B is attached, and these sounds cancel each other and are reduced. become.

  Note that the hollow region 100 may be filled with a soft resin such as silicone gel to further suppress the sound generated when the exciter film 30 and the diaphragm 40 vibrate.

  Next, a tactile sense presentation device according to a second embodiment will be described. FIG. 6 is an external perspective view of a tactile sense presentation device 10A according to the second embodiment. FIG. 7A shows a state before the diaphragm 40A is fixed, and FIG. 7B is a structural explanatory diagram showing a state after the diaphragm 40A is fixed.

  The haptic presentation device 10A according to the second embodiment is configured so that the main surface of the diaphragm 40A and the main surface of the exciter film 30 are parallel to the haptic presentation device 10 shown in the first embodiment. The difference is that the end portion of the diaphragm 40 </ b> A is fixed to the exciter film 30 via the frame 70. In this example, the piezoelectric film 20 </ b> A is attached to the back side of the exciter film 30, and the piezoelectric film 20 </ b> B is attached to the front side of the exciter film 30. Other configurations are the same as those of the tactile sense presentation device 10.

  The diaphragm 40A is made of the same material as that of the diaphragm 40 shown in the first embodiment. However, as shown in FIG. 7A, the flat plate surface is curved when not fixed to the exciter film 30. It is. Such a shape can be realized, for example, by bending a diaphragm having a flat main surface by heat treatment or the like.

  As shown in a white arrow St902 in FIG. 7A, the vibration plate 40A has a frame 70 so that a curved flat plate surface becomes flat as shown in FIG. It fixes to the exciter film 30 via. The diaphragm 40A is fixed to the exciter film 30 in such a state, and thus a bending stress is generated as in the first embodiment. Further, as shown by a thick arrow S902 in FIG. 7B, the exciter film 30 is pulled from the center in the direction parallel to the main surface and perpendicular to both ends fixing the diaphragm 40 toward the fixed end. It is done.

  Even with such a configuration, the same operational effects as those of the first embodiment described above can be obtained. Furthermore, if the configuration of the present embodiment is used, the main surface of the diaphragm 40A can be fixed flat. Therefore, the touch panel 50A attached to the diaphragm 40A can also be made flat.

  Next, a tactile sense presentation device according to a third embodiment will be described with reference to the drawings. FIG. 8A is a view of the tactile sense presentation device 10B according to the third embodiment as viewed from the back side. FIG. 8B is a rear perspective view of the tactile presentation device 10B. The tactile presentation device 10B has a central position in the longitudinal direction of the exciter film 30 as a boundary so that the piezoelectric film 20A and the piezoelectric film 20B do not overlap each other in plan view with respect to the tactile presentation device 10 according to the first embodiment. It is divided into. Other configurations are the same as those of the tactile sense presentation device 10.

  Also in this case, the exciter film 30 is bent in the opposite direction between the place where the piezoelectric film 20A is attached and the place where the piezoelectric film 20B is attached. Therefore, the sound generated when the exciter film 30 expands and contracts is opposite in phase between the place where the piezoelectric film 20A is attached and the place where the piezoelectric film 20B is attached, and these sounds cancel each other and are reduced. become.

  Next, FIG. 9A is a view of the tactile sense presentation device 10C according to the fourth embodiment as viewed from the back side. FIG. 9B is a rear perspective view. In the tactile sense presentation device 10C, the exciter film 30 is divided into a plurality of (four in this example) exciter film 30AR, exciter film 30BR, exciter film 30AL, and exciter film 30BL along both longitudinal ends of the diaphragm 40. The piezoelectric film 20AR, the piezoelectric film 20BR, the piezoelectric film 20AL, and the piezoelectric film 20BL are mounted, respectively. The piezoelectric film 20AR is mounted on the back side of the exciter film 30AR, the piezoelectric film 20AL is mounted on the back side of the exciter film 30AL, the piezoelectric film 20BR is mounted on the front side of the exciter film 30BR, and the piezoelectric film 20BL is It is mounted on the front side of the exciter film 30BL. Other configurations are the same as those of the tactile sense presentation device 10.

  In this case, the exciter film 30AR and the exciter film 30AL and the exciter film 30BR and the exciter film 30BL are curved in opposite directions. Therefore, the sound generated when the exciter film 30AR and the exciter film 30AL expands and contracts and the sound generated when the exciter film 30BR and the exciter film 30BL expand and contract are in opposite phases, and these sounds cancel each other and are reduced. It will be.

  Next, FIG. 10 is a rear perspective view of the tactile sense presentation device 10D according to the fifth embodiment. FIG. 11 is an operation explanatory diagram of the tactile sense presentation device 10D. The tactile presentation device 10D includes a support member 51A and a support member 51B in addition to the configuration of the tactile presentation device 10C. Other configurations are the same as those of the tactile sense presentation device 10C.

  The support member 51A and the support member 51B support the diaphragm 40 at at least two places other than the edge of the diaphragm 40 and contact the ground plane. In this example, the support member 51A and the support member 51B have a cylindrical shape, and the side surface is in contact with the grounding surface. However, the structure is not limited to such a structure. In this example, three support members 51A and three support members 51B are provided. However, the present invention is not limited to this example, and the diaphragm 40 is supported at least at two locations other than the edge of the diaphragm 40. Any number can be used as long as it can be performed.

  Also in this example, the diaphragm 40 changes to the state shown in FIG. 11B or the state shown in FIG. 11C based on the state shown in FIG. Vibrates along the direction and the back direction (direction orthogonal to the main surface of the diaphragm 40). Here, as shown in FIG. 11B, when the piezoelectric film 20AR contracts and the exciter film 30AR contracts (other exciter films are the same), the support member 51A and the support member 51B The two move closer to each other and move closer to each other. However, the support member 51A and the support member 51B hardly move in the normal direction of the ground plane. Therefore, the vibration plate 40 moves to the front side at locations inside the support member 51A and the support member 51B, and moves to the back side at locations outside (edge side).

  Similarly, as shown in FIG. 11C, when the exciter film 30AR (the same applies to other exciter films) is extended, the support member 51A and the support member 51B move in a direction parallel to the ground plane. Both move away and move little in the normal direction of the ground plane. Therefore, the diaphragm 40 moves to the back side at the inside of the support member 51A and the support member 51B, and moves to the front side at the outside (edge side) location.

  As described above, the diaphragm 40 moves in the opposite direction between the inside portion and the outside (edge side) portion of the support member in plan view, so that the sound generated from the diaphragm 40 has an opposite phase. Therefore, the sound generated from the diaphragm 40 is reduced by canceling each other between the inside portion and the outside (edge side) portion of the support member in plan view.

  The support member is preferably installed at a position where the area of the inner side and the outer side (edge side) are the same when the diaphragm is viewed in plan, but at least two places other than the edge of the diaphragm are supported. As long as the sound generated from the diaphragm can be reduced, it may be installed at any position.

  In FIG. 10, an exciter film having a piezoelectric film mounted on the front side and an exciter film having a piezoelectric film mounted on the back side are provided, and both sounds generated by vibrations of the diaphragm and the exciter film are provided. Although an example of reducing is shown, as shown in FIG. 12, all the piezoelectric films may be attached to either one (in this example, the front side) to reduce only the sound generated by the diaphragm. One exciter film with one piezoelectric film mounted thereon may be provided to reduce only the sound generated by the diaphragm.

  Next, FIG. 13A is a side view of a piezoelectric film 20D according to a modification of the piezoelectric film. The piezoelectric film 20A illustrated in FIG. 3 has a structure in which one base film 200 is sandwiched between the electrode 201A and the electrode 201B, but the piezoelectric film 20D illustrated in FIG. 13A has the base film 200, the electrode 201A, and the electrode 201B. A plurality of layers are stacked. In this example, electrodes 201 </ b> A and electrodes 201 </ b> B are alternately arranged with each base film 200 interposed therebetween. Thus, by laminating the plurality of base films 200, the electrodes 201A, and the electrodes 201B, the stretchability is further improved, and strong vibration can be generated.

  On the other hand, FIG. 13B is a side view of the piezoelectric film 20E according to Modification 2. The piezoelectric film 20E shown in FIG. 13B realizes a laminated structure by sandwiching one base film 200 between the electrode 201A and the electrode 201B and bending and stacking the base film 200, the electrode 201A, and the electrode 201B. It is. Also in this case, the stretchability is further improved, and a strong vibration can be generated. However, in this case, it is preferable to reinforce the electrical connection by applying a conductive paste or the like at a portion where the electrode is bent.

DESCRIPTION OF SYMBOLS 10 ... Tactile presentation apparatus 20A, 20B ... Piezoelectric film 30 ... Exciter film 40 ... Diaphragm 50 ... Touch panel 80 ... Touch sensor 81 ... Drive part

Claims (10)

A piezoelectric film made of a piezoelectric resin having electrodes formed on both main surfaces;
A flat exciter film on which the piezoelectric film is mounted;
A flat diaphragm fixed to the exciter film in a state where bending stress is generated;
A touch detection unit for detecting a touch operation;
A drive unit that applies a drive signal to the piezoelectric film when the touch detection unit detects a touch operation;
The piezoelectric film has a first piezoelectric film attached to one main surface of the exciter film, and a second piezoelectric film attached to the other main surface of the exciter film,
The tactile sensation presentation apparatus, wherein the first piezoelectric film and the second piezoelectric film are mounted so that there is a portion that does not overlap each other when the exciter film is viewed in plan.   The said exciter film is divided | segmented into the 1st exciter film with which the said 1st piezoelectric film was mounted | worn, and the 2nd exciter film with which the said 2nd piezoelectric film was mounted | worn, It is characterized by the above-mentioned. Tactile presentation device. A piezoelectric film made of a piezoelectric resin having electrodes formed on both main surfaces;
A flat exciter film on which the piezoelectric film is mounted;
A flat diaphragm fixed to the exciter film in a state where bending stress is generated;
A touch detection unit for detecting a touch operation;
A drive unit that applies a drive signal to the piezoelectric film when the touch detection unit detects a touch operation;
A support member for supporting the diaphragm,
The tactile sense presentation device, wherein the support member supports the diaphragm at at least two places other than an edge of the diaphragm.   The haptic presentation device according to claim 1, wherein the touch detection unit is realized by a touch panel attached to the diaphragm.   5. The tactile sensation according to claim 1, wherein the diaphragm is fixed to the exciter film while being curved in a direction orthogonal to a main surface of the exciter film. Presentation device.   The vibration plate has a shape in which a flat plate surface is curved when not fixed to the exciter film, and is fixed to the exciter film so that the curved flat plate surface is flat. The tactile sense presentation device according to any one of claims 1 to 4.   The tactile sensation presentation device according to claim 1, wherein the piezoelectric film is formed by laminating a plurality of the electrodes and the piezoelectric resin.   The tactile sensation presentation apparatus according to claim 1, wherein the piezoelectric resin is made of polyvinylidene fluoride.   The tactile sensation presentation apparatus according to claim 1, wherein the piezoelectric resin is made of a chiral polymer.   The tactile sensation presentation apparatus according to claim 9, wherein the chiral polymer is made of polylactic acid.

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