Vibration device and tactile presentation module

Abstract

To provide a vibration device capable of reducing stress added to a voltage expansion / contraction member.SOLUTION: A vibration device 10 includes: an expansion / contraction part 11 including a voltage expansion / contraction member 110 expanding / contracting in a first direction; and a bent member 12 bending as the voltage expansion / contraction member expands / contracts. The bent member includes a first bent part 121, a second bent part 122, a first intermediate part 123, and a second intermediate part 124. The first bent part is located on one side in a second direction relative to the expansion / contraction part and expands from one end to the other end of the expansion / contraction part in the first direction. The second bent part is located on the other side in the second direction relative to the expansion / contraction part, and expands from one end to the other end of the expansion / contraction part in the first direction. The expansion / contraction part is located between the voltage expansion / contraction member in the first direction and the first intermediate part, and includes at least one first connection member 111 composing one end in the first direction of the expansion / contraction part. The first connection member is composed so that it is harder to expand / contract in the first direction and is easier to expand / contract in the second direction than the voltage expansion / contraction member.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibration device and a tactile presentation module. [Background technology]

[0002] Patent Document 1 discloses a piezoelectric driving device comprising a stacked piezoelectric element, a pair of bending members, a pair of driven bodies, and an elastic part. The pair of bending members are arranged on either side of the stacked piezoelectric element, with both ends connected to both ends of the stacked piezoelectric element in the stacking direction, and their shapes change in response to the expansion and contraction of the stacked piezoelectric element in the stacking direction. The pair of driven bodies are arranged with the stacked piezoelectric element between them and are attached to the center of the pair of bending members. The elastic part applies force to the pair of driven bodies in a direction that widens the gap between them. In the piezoelectric driving device of Patent Document 1, one of the pair of driven bodies is fixed to a base. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5582839 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, if the piezoelectric driving device of Patent Document 1 is dropped from a high place along with its base and hits a rigid body such as a floor, it will rotate around the fixed driven body, applying large stress to both ends of the stacked piezoelectric element in the stacking direction, which may cause the stacked piezoelectric element to break.

[0005] An object of the present invention is to provide a vibration device that can reduce the stress applied to a voltage expansion / contraction member, and a tactile presentation module that includes the vibration device. [Means for solving the problem]

[0006] A vibration device according to one aspect of the present invention comprises: an expansion / contraction section including a voltage expansion / contraction member that expands and contracts in a first direction; a bending member that bends in response to expansion and contraction of the voltage expansion / contraction member; Equipped with The bending member is a first bent portion located on one side of the stretchable portion in a second direction intersecting the first direction and extending from one end to the other end of the stretchable portion in the first direction; a second bent portion located on the other side of the stretchable portion in the second direction and extending from one end to the other end of the stretchable portion in the first direction; a first intermediate portion to which one ends of the first bent portion, the second bent portion, and the stretchable portion in the first direction are connected; a second intermediate portion to which the other ends of the first bent portion, the second bent portion, and the stretchable portion in the first direction are connected; Including, The stretchable portion is at least one first connection member located between the voltage expansion / contraction member and the first intermediate portion in the first direction and constituting one end of the expansion / contraction portion in the first direction; The first connecting member is The voltage expansion / contraction member is configured to be less flexible in the first direction and more flexible in the second direction than the voltage expansion / contraction member.

[0007] The tactile presentation module according to one aspect of the present invention comprises: The vibration device according to the above aspect; a movable member attached to the first bending portion and movable in the second direction; a fixing member attached to the second bending portion; Equipped with. [Effects of the Invention]

[0008] According to the vibration device, it is possible to realize a vibration device that can reduce the stress applied to the voltage expansion / contraction member.

[0009] According to the tactile presentation module, it is possible to realize a tactile presentation module that can reduce the stress applied to the voltage expansion / contraction member. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a tactile presentation module equipped with a vibration device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the tactile presentation module in FIG. 1. [Figure 3] FIG. 2 is a perspective view showing a first modified example of the vibration device of FIG. [Figure 4] FIG. 4 is an enlarged perspective view of FIG. 3; [Figure 5] FIG. 2 is a plan view showing a second modified example of the vibration device of FIG. [Figure 6] FIG. 10 is a plan view showing a third modified example of the perspective view of FIG. [Figure 7] FIG. 10 is a plan view showing a tactile presentation module of a comparative example. [Figure 8] 2 is a graph showing the stress applied to the tactile presentation module of FIG. 1 due to a fall. [Figure 9] 8 is a graph showing the stress applied to the tactile presentation module of FIG. 7 due to a fall. DETAILED DESCRIPTION OF THE INVENTION

[0011] The vibration device according to the first aspect of the present invention comprises: an expansion / contraction section including a voltage expansion / contraction member that expands and contracts in a first direction; a bending member that bends in response to expansion and contraction of the voltage expansion / contraction member; Equipped with The bending member is a first bent portion located on one side of the stretchable portion in a second direction intersecting the first direction and extending from one end to the other end of the stretchable portion in the first direction; a second bent portion located on the other side of the stretchable portion in the second direction and extending from one end to the other end of the stretchable portion in the first direction; a first intermediate portion to which one ends of the first bent portion, the second bent portion, and the stretchable portion in the first direction are connected; a second intermediate portion to which the other ends of the first bent portion, the second bent portion, and the stretchable portion in the first direction are connected; Including, The stretchable portion is at least one first connection member located between the voltage expansion / contraction member and the first intermediate portion in the first direction and constituting one end of the expansion / contraction portion in the first direction; The first connecting member is The voltage expansion / contraction member is configured to be less flexible in the first direction and more flexible in the second direction than the voltage expansion / contraction member.

[0012] According to the vibration device of the first aspect, the stress applied to the voltage expansion / contraction member can be reduced.

[0013] A vibration device according to a second aspect of the present invention is the vibration device according to the first aspect, The first connection member has a dimension in the second direction that is smaller than that of the voltage expansion / contraction member.

[0014] According to the vibration device of the second aspect, it is possible to easily realize a vibration device that can reduce the stress applied to the voltage expansion / contraction member.

[0015] A vibration device according to a third aspect of the present invention is the vibration device according to the second aspect, The stretchable portion is a second connection member located between the voltage expansion / contraction member and the first connection member in the first direction and connecting the voltage expansion / contraction member and the first connection member; The second connection member has a dimension in the second direction that is larger than that of the first connection member.

[0016] According to the vibration device of the third aspect, it is possible to easily realize a vibration device that can reduce the stress applied to the voltage expansion / contraction member.

[0017] A vibration device according to a fourth aspect of the present invention is the vibration device according to any one of the first to third aspects, The stretchable portion is at least one third connection member located between the voltage expansion / contraction member and the second intermediate portion in the first direction and constituting the other end of the expansion / contraction portion in the first direction; The third connecting member is The voltage expansion / contraction member is configured to be less flexible in the first direction and more flexible in the second direction than the voltage expansion / contraction member.

[0018] According to the vibration device of the fourth aspect, the stress applied to the voltage expansion / contraction member can be reduced more reliably.

[0019] A vibration device according to a fifth aspect of the present invention is the vibration device according to the fourth aspect, The stretchable portion is a fourth connection member located between the voltage expansion / contraction member and the third connection member in the first direction and connecting the voltage expansion / contraction member and the third connection member; The fourth connection member has a dimension in the second direction that is larger than that of the third connection member.

[0020] According to the vibration device of the fifth aspect, it is possible to easily realize a vibration device that can more reliably reduce the stress applied to the voltage expansion / contraction member.

[0021] A vibration device according to a sixth aspect of the present invention is the vibration device according to any one of the first to fifth aspects, The stretchable portion is The first connecting members are arranged at intervals in a third direction that intersects the first direction and the second direction.

[0022] According to the vibration device of the sixth aspect, it is possible to easily realize a vibration device that can reduce the stress applied to the voltage expansion / contraction member.

[0023] A seventh aspect of the present invention is a vibration device according to any one of the first to sixth aspects, wherein: The stretchable portion The first connecting members include a plurality of the first connecting members spaced apart in the second direction.

[0024] According to the vibration device of the seventh aspect, it is possible to easily realize a vibration device that can reduce the stress applied to the voltage expansion / contraction member.

[0025] The tactile presentation module according to an eighth aspect of the present invention comprises: A vibration device according to any one of the first to seventh aspects; a movable member attached to the first bending portion and movable in the second direction; a fixing member attached to the second bending portion; Equipped with.

[0026] According to the eighth aspect of the tactile presentation module, it is possible to realize a tactile presentation module that can reduce the stress applied to the voltage expansion / contraction member.

[0027] A tactile presentation module according to a ninth aspect of the present invention is the tactile presentation module according to the eighth aspect, An elastic member is provided that biases the movable member and the fixed member toward each other along the second direction.

[0028] According to the ninth aspect of the tactile presentation module, it is possible to more reliably realize a tactile presentation module that can reduce the stress applied to the voltage expansion / contraction member.

[0029] A tactile presentation module according to a tenth aspect of the present invention is the tactile presentation module according to the eighth aspect, The first bent portion and the second bent portion bias the first intermediate portion and the second intermediate portion in directions away from each other.

[0030] According to the tactile presentation module of the tenth aspect, it is possible to more reliably realize a tactile presentation module that can reduce the stress applied to the voltage expansion / contraction member.

[0031] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The following description does not limit the present disclosure, but is essentially merely illustrative, and appropriate modifications can be made without departing from the spirit of the present disclosure. The drawings are schematic, and the ratios of dimensions and the like do not necessarily correspond to reality.

[0032] 1, a tactile presentation module 1 according to one embodiment of the present invention includes a vibration device 10, a movable member 20, a fixed member 30, and an elastic member 40. In this embodiment, the tactile presentation module 1 is located on a plate surface 51 of a substantially rectangular plate-shaped base 50, and is fixed to the base 50 via the fixed member 30.

[0033] As shown in FIG. 2, the vibration device 10 includes an expandable portion 11 and a bending member 12.

[0034] The expansion / contraction section 11 includes a voltage expansion / contraction member 110 that expands and contracts in a first direction (e.g., the Z direction), and a first connection member 111 that constitutes one end in the first direction Z of the expansion / contraction section 11 (e.g., the upper end in FIG. 2 ). In this embodiment, the expansion / contraction section 11 is provided symmetrically with respect to an imaginary straight line L that passes through the center of the voltage expansion / contraction member 110 in a second direction (e.g., the X direction) that intersects the first direction Z and extends in the first direction Z.

[0035] The voltage expansion / contraction member 110 has, for example, a substantially rectangular prism shape extending along the first direction Z, and is configured to allow a voltage to be applied. The voltage expansion / contraction member 110 is a member that deforms when a voltage is applied, and is made of, for example, piezoelectric ceramics, piezoelectric film, a composite material in which piezoelectric ceramics is resin-molded, electrically driven elastomer, liquid crystal elastomer, ion-conductive ceramics, ion-conductive glass, ion-conductive polymer film, and a material including a shape-memory alloy that deforms when a voltage is applied. Ion-conductive glass is glass that deforms when ions move within a solid when a voltage is applied, and ion-conductive polymer film is a polymer film that deforms when ions move within a solid when a voltage is applied.

[0036] The first connecting member 111 is located between the voltage contraction member 110 and a first intermediate portion 123 of the bending member 12, which will be described later, in the first direction Z. The first connecting member 111 is configured to be less likely to expand and contract in the first direction Z than the voltage contraction member 110 and more likely to bend in the second direction X. Both ends of the first connecting member 111 are not in contact with their counterparts (the second connecting member 112 and the first intermediate portion 123 in this embodiment) and must be fixed to each other. In this embodiment, the first connecting member 111 is plate-shaped and extends along the first direction Z, and has a dimension W2 in the second direction X that is smaller than the dimension W1 of the voltage contraction member 110.

[0037] The first connection member 111 is made of a material containing, for example, metal (stainless steel, tungsten alloy, titanium alloy, etc.), glass, and plastic material (fiber reinforced polyacetal, polycarbonate, glass epoxy composite material, liquid crystal polymer, etc.). For example, by making the first connection member 111 out of a substrate material for circuit wiring, the configuration related to the electrical wiring for applying a voltage to the voltage expansion / contraction member 110 can be simplified.

[0038] In this embodiment, the stretchable portion 11 includes, in addition to the first connecting member 111, a second connecting member 112, a third connecting member 113, and a fourth connecting member 114.

[0039] The second connecting member 112 is located between the voltage contraction member 110 and the first connecting member 111 in the first direction Z and connects the voltage contraction member 110 and the first connecting member 111. One end of the second connecting member 112 in the first direction Z is fixed to the first connecting member 111, and the other end of the second connecting member 112 in the first direction Z is fixed to the voltage contraction member 110. The second connecting member 112 has a dimension W3 in the second direction X that is larger than that of the first connecting member 111. Both ends of the second connecting member 112 and their counterparts (the voltage contraction member 110 and the first connecting member 111 in this embodiment) are not in contact with each other but must be fixed to each other. In this embodiment, the second connecting member 112 is made of, for example, the same material as the first connecting member 111 and has a substantially rectangular prism shape with a dimension W3 in the second direction X that is substantially the same as the dimension W1 in the second direction X of the voltage contraction member 110.

[0040] The third connecting member 113 is located between the voltage contraction member 110 and a second intermediate portion 124 of the bending member 12 (described later) in the first direction Z, and constitutes the other end of the contraction portion 11 in the first direction Z (for example, the lower end in FIG. 2 ). The third connecting member 113 is configured to be less likely to contract in the first direction Z and more likely to bend in the second direction X than the voltage contraction member 110. Both ends of the third connecting member 113 and their counterparts (in this embodiment, the fourth connecting member 114 and the second intermediate portion 124) are not in contact with each other and must be fixed to each other. In this embodiment, the third connecting member 113 is made of the same material as the first connecting member 111 and has the same shape and size.

[0041] The fourth connecting member 114 is located between the voltage contraction member 110 and the third connecting member 113 in the first direction Z, and connects the voltage contraction member 110 and the third connecting member 113. Both ends of the fourth connecting member 114 are not in contact with each other and must be fixed to each other (in this embodiment, the voltage contraction member 110 and the third connecting member 113). In this embodiment, the fourth connecting member 114 is made of the same material as the second connecting member 112 and has the same shape and size.

[0042] The bending member 12 is configured to bend in response to the expansion and contraction of the voltage expansion / contraction member 110. Specifically, the bending member 12 includes a first bending portion 121, a second bending portion 122, a first intermediate portion 123, and a second intermediate portion 124. In this embodiment, the bending member 12 is made of, for example, the same material as the first connecting member 111 and is provided symmetrically with respect to the imaginary line L. When viewed along a third direction (for example, the Y direction) intersecting the first direction Z and the second direction X, the first intermediate portion 123 and the second intermediate portion 124 are located on the imaginary line L.

[0043] The first bent portion 121 is located on one side of the stretchable portion 11 in the second direction X (for example, the right side in FIG. 2), and extends from one end to the other end of the stretchable portion 11 in the first direction Z. In this embodiment, the first bent portion 121 includes a central portion 1211, a first side portion 1212, and a second side portion 1213.

[0044] The central portion 1211 has, for example, a substantially rectangular plate shape extending along the imaginary straight line L, and is positioned at a distance in the second direction X from the voltage contraction member 110. The movable member 20 is attached to the central portion 1211 via an elastic member 40. One end of the central portion 1211 in the first direction Z is positioned farther from the first intermediate portion 123 than one end of the voltage contraction member 110 in the first direction Z. The other end of the central portion 1211 in the first direction Z is positioned farther from the second intermediate portion 124 than the other end of the voltage contraction member 110 in the first direction Z.

[0045] The first side portion 1212 is, for example, a substantially rectangular plate extending in a direction intersecting the imaginary line L, and both ends in the first direction Z are connected to one end in the first direction Z of the central portion 1211 and the first intermediate portion 123. The second side portion 1213 is, for example, a substantially rectangular plate extending in a direction intersecting the imaginary line L, and both ends in the first direction Z are connected to the other end in the first direction Z of the central portion 1211 and the second intermediate portion 124.

[0046] The second bent portion 122 is located on the other side in the second direction X relative to the stretchable portion 11 (for example, the left side in FIG. 2), and extends from one end to the other end of the stretchable portion 11 in the first direction Z. In this embodiment, the second bent portion 122 includes a central portion 1221, a first side portion 1222, and a second side portion 1223.

[0047] The central portion 1221 has, for example, a substantially rectangular plate shape extending along the imaginary straight line L, and is positioned at a distance in the second direction X from the voltage expansion / contraction member 110. A fixing member 30 is attached to the central portion 1221 via an elastic member 40. One end of the central portion 1221 in the first direction Z is positioned farther from the first intermediate portion 123 than one end of the voltage expansion / contraction member 110 in the first direction Z. The other end of the central portion 1221 in the first direction Z is positioned farther from the second intermediate portion 124 than the other end of the voltage expansion / contraction member 110 in the first direction Z.

[0048] The first side portion 1222 has, for example, a substantially rectangular plate shape extending in a direction intersecting the imaginary line L, and both ends in the first direction Z are connected to one end in the first direction Z of the central portion 1221 and the first intermediate portion 123. The second side portion 1223 has, for example, a substantially rectangular plate shape extending in a direction intersecting the imaginary line L, and both ends in the first direction Z are connected to the other end in the first direction Z of the central portion 1221 and the second intermediate portion 124.

[0049] The first intermediate portion 123 is connected to one end in the first direction Z of the first bent portion 121, the second bent portion 122, and the stretchable portion 11. In this embodiment, the first intermediate portion 123 has a substantially rectangular parallelepiped shape and is positioned so that the second direction X is its longitudinal direction. The first bent portion 121, the second bent portion 122, and one end in the first direction Z of the first connecting member 111 are connected to the surface of the first intermediate portion 123 facing the stretchable portion 11. When viewed along the third direction Y, the one end in the first direction Z of the first connecting member 111 is located between one end in the first direction Z of the first bent portion 121 and one end in the first direction Z of the second bent portion 122.

[0050] The second intermediate portion 124 is connected to the other ends in the first direction Z of the first bent portion 121, the second bent portion 122, and the stretchable portion 11. In this embodiment, the second intermediate portion 124 has a substantially rectangular parallelepiped shape and is positioned so that the second direction X is its longitudinal direction. The first bent portion 121, the second bent portion 122, and the other ends in the first direction Z of the third connecting member 113 are connected to the surface of the second intermediate portion 124 facing the stretchable portion 11. When viewed along the third direction Y, the other end in the first direction Z of the third connecting member 113 is located between the other end in the first direction Z of the first bent portion 121 and the other end in the first direction Z of the second bent portion 122.

[0051] The movable member 20 is attached to the first bent portion 121 and is configured to be movable in the second direction X. In this embodiment, the movable member 20 is a touch panel in the shape of a substantially rectangular plate, and is attached to a central portion 1211 of the first bent portion 121 via an elastic member 40. The movable member 20 is located on one side of the expandable portion 11 in the second direction X and at a position farther from the expandable portion 11 in the second direction X than the first bent portion 121. A sponge-like cushion 21 (see FIG. 1) is provided between the movable member 20 and the base 50. The cushion 21 allows the movable member 20 to be positioned on the plate surface 51 of the base 50 in a state in which it can vibrate in the second direction X.

[0052] The fixing member 30 is attached to the second bent portion 122. In this embodiment, the fixing member 30 has a substantially rectangular parallelepiped shape extending along the first direction Z, is made of the same material as the first connecting member 111, and is attached to the central portion 1221 of the second bent portion 122 via an elastic member 40. The fixing member 30 is located on the other side of the expandable portion 11 in the second direction X, and is fixed to the plate surface 51 of the base 50.

[0053] The elastic member 40 urges the movable member 20 and the fixed member 30 toward each other along the second direction X to urge the first intermediate portion 123 and the second intermediate portion 124 in directions away from each other. In this embodiment, the elastic member 40 is configured as a leaf spring that has a substantially elliptical shape when viewed along the third direction Y and whose thickness direction is the radial direction. The vibration device 10 is located inside the elastic member 40, and the central portion 1211 of the first bent portion 121 and the central portion 1221 of the second bent portion 122 are attached to the elastic member 40. Therefore, the elastic member 40 urges not only the movable member 20 and the fixed member 30 but also the first bent portion 121 and the second bent portion 122 in directions toward each other along the second direction X.

[0054] The operation of the tactile presentation module 1 will now be described. When a finger touches the touch panel, which is the movable member 20, a voltage is applied to the voltage expansion / contraction member 110. When a voltage is applied to the voltage expansion / contraction member 110, the voltage expansion / contraction member 110 expands and contracts in the first direction Z, bending the bending member 12. This causes the touch panel to vibrate in the second direction X, and the vibration is transmitted to the finger touching the touch panel.

[0055] The vibration device 10 can provide the following effects.

[0056] The vibration device 10 includes an expandable section 11 including a voltage expandable member 110 that expands and contracts in a first direction, and a bending member 12 that bends in response to the expansion and contraction of the voltage expandable member 110. The bending member 12 includes a first bent section 121, a second bent section 122, a first intermediate section 123, and a second intermediate section 124. The first bent section 121 is located on one side of the expandable section 11 in the second direction and extends from one end of the expandable section 11 to the other end in the first direction. The second bent section 122 is located on the other side of the expandable section 11 in the second direction and extends from one end of the expandable section 11 to the other end in the first direction. The first intermediate section 123 is connected to the first bent section 121, the second bent section 122, and one end of the expandable section 11 in the first direction. The second intermediate section 124 is connected to the first bent section 121, the second bent section 122, and the other end of the expandable section 11 in the first direction. The expandable section 11 includes at least one first connecting member 111 that is located between the voltage expandable member 110 and the first intermediate section 123 in the first direction and that constitutes one end of the expandable section 11 in the first direction. The first connecting member 111 is configured to be less likely to expand or contract in the first direction and more likely to bend in the second direction than the voltage expandable member 110. With this configuration, for example, even if the vibration device 10 falls from a high place and hits a rigid body such as a floor, the stress applied to the voltage expandable member 110 can be reduced.

[0057] The first connecting member 111 has a dimension in the second direction that is smaller than that of the voltage expansion / contraction member 110. With this configuration, a vibration device 10 that can reduce the stress applied to the voltage expansion / contraction member 110 can be easily realized.

[0058] The expansion / contraction section 11 is located between the voltage expansion / contraction member 110 and the first connection member 111 in the first direction, and includes a second connection member 112 that connects the voltage expansion / contraction member 110 and the first connection member 111. The second connection member 112 has a dimension in the second direction that is larger than that of the first connection member 111. With this configuration, a vibration device 10 that can reduce the stress applied to the voltage expansion / contraction member 110 can be easily realized.

[0059] The expandable section 11 includes at least one third connection member 113 that is located between the voltage expandable member 110 and the second intermediate section 124 in the first direction and that constitutes the other end in the first direction of the expandable section 11. The third connection member 113 is configured to be less likely to expand or contract in the first direction and more likely to bend in the second direction than the voltage expandable member 110. With this configuration, the stress applied to the voltage expandable member 110 can be more reliably reduced.

[0060] The expansion / contraction section 11 is located between the voltage expansion / contraction member 110 and the third connection member 113 in the first direction, and includes a fourth connection member 114 that connects the voltage expansion / contraction member 110 and the third connection member 113. The fourth connection member 114 has a dimension in the second direction that is larger than that of the third connection member 113. With this configuration, it is possible to easily realize a vibration device 10 that can more reliably reduce the stress applied to the voltage expansion / contraction member 110.

[0061] The tactile presentation module 1 can provide the following effects.

[0062] The tactile presentation module 1 includes a vibration device 10, a movable member 20 attached to the first bending portion 121 and movable in the second direction, and a fixed member 30 attached to the second bending portion 122. With this configuration, a tactile presentation module 1 that can reduce the stress applied to the voltage expansion / contraction member 110 can be realized.

[0063] The tactile presentation module 1 includes an elastic member 40 that biases the movable member 20 and the fixed member 30 toward each other along the second direction. With this configuration, it is possible to more reliably realize a tactile presentation module 1 that can reduce the stress applied to the voltage expansion / contraction member 110.

[0064] The vibration device 10 and the tactile presentation module 1 can also be configured as follows.

[0065] The first connecting member 111 may be configured to be less likely to expand and contract in the first direction and more likely to bend in the second direction than the voltage expansion / contraction member 110. Such a configuration may be realized by structural features as in the above embodiment, or may be realized by the properties of the material that constitutes the first connecting member 111.

[0066] 3 and 4, the expansion / contraction section 11 may include a plurality of first connection members 111 arranged at intervals in the third direction Y. By configuring it in this manner, it is possible to easily realize a vibration device 10 that can reduce the stress applied to the voltage expansion / contraction member 110.

[0067] 3 and 4, the expansion / contraction section 11 further includes two third connecting members 113 spaced apart in the third direction Y. The third connecting members 113 have the same configuration and size as the first connecting members 111.

[0068] Each first connecting member 111 has a substantially rectangular plate shape with its thickness direction aligned in the third direction Y, and is connected to both ends in the third direction Y of the second connecting member 112 and the first intermediate portion 123. As shown in Fig. 4, the dimension W4 in the second direction X of each first connecting member 111 is smaller than the dimension W1 in the second direction X of the voltage contraction member 110. In the vibration device 10 of Figs. 3 and 4, the voltage contraction member 110 has a substantially rectangular plate shape with its thickness direction aligned in the third direction Y.

[0069] In the vibration device 10 of FIGS. 3 and 4, the first bent portion 121, the second bent portion 122, the first intermediate portion 123, and the second intermediate portion 124 are connected by a connecting portion 125, and the portions constituting the first bent portion 121 and the second bent portion 122 are connected by the connecting portion 125. As shown in FIG. 4, each connecting portion 125 includes two members 126 spaced apart in the third direction Y. Each member 126 has a substantially rectangular plate shape with its thickness direction aligned in the third direction Y. A dimension W5 in the second direction X of each member 126 is smaller than a dimension in the second direction X of the connecting portion (e.g., a dimension W6 in the second direction X of a first side portion 1212 of the first bent portion 121 or a dimension W7 in the second direction X of a first side portion 1222 of the second bent portion 122). When viewed in the third direction Y, each connecting portion 125 is located at an end close to the imaginary line L in the second direction X on the surfaces of two adjacent portions facing each other.

[0070] 5, the expansion / contraction section 11 may include a plurality of first connection members 111 arranged at intervals in the second direction X. By configuring in this manner, it is possible to easily realize a vibration device 10 that can reduce the stress applied to the voltage expansion / contraction member 110.

[0071] 5, the expansion / contraction unit 11 further includes two third connecting members 113 spaced apart in the third direction Y. The third connecting members 113 have the same configuration and size as the first connecting members 111.

[0072] The vibration device 10 of Figures 3 and 4 may be combined with the vibration device 10 of Figure 5. For example, the expandable portion 11 may include two sets of two first connecting members 111 spaced apart in the second direction X, and the two sets may be spaced apart in the third direction Y.

[0073] It is possible to omit the second connecting member 112, the third connecting member 113, and the fourth connecting member 114. As an example, a vibration device 10 in which the third connecting member 113 and the fourth connecting member 114 are omitted is shown in FIG.

[0074] The movable member 20 can be attached to the first bent portion 121 and can have any configuration that allows it to move in the second direction. The fixed member 30 can be attached to the second bent portion 122 and can have any configuration. The elastic member 40 can be urged to move the movable member 20 and the fixed member 30 toward each other along the second direction X. For example, if the bending member 12 (in other words, the first bent portion 121 and the second bent portion 122) urges the first intermediate portion 123 and the second intermediate portion 124 in directions that move them away from each other, the elastic member 40 may be omitted. This configuration more reliably realizes a tactile presentation module 1 that can reduce the stress applied to the voltage expansion / contraction member 110. [Example]

[0075] The present invention will be explained in more detail below by showing examples, but the present invention is not limited to these examples in any way.

[0076] The stress applied to the voltage expansion / contraction member 110 was measured when the tactile presentation module 1 of the present invention was dropped and collided. Specifically, the two tactile presentation modules 1, 100 were dropped from a position 75 cm away in the vertical direction onto a collision wall (an example of a rigid body) extending horizontally, with the first direction Z aligned with the vertical direction, and the stress applied to the voltage expansion / contraction members 110, 211 was measured.

[0077] The details of the tactile presentation module 1 (see FIG. 1) used in this example are given below. An expansion / contraction section 11 was used, which included a voltage expansion / contraction member 110 (including a second connection member 112 and a fourth connection member 114) having a length in the first direction Z of 50.0 mm, and a first connection member 111 and a third connection member 113 having a length in the first direction Z of 6.0 mm. The bending member 12 used had central portions 1211 and 1221 with a length of 26.0 mm in the first direction Z. The elastic member 40 used had a length of 90.0 mm in the first direction Z.

[0078] The details of the tactile presentation module 100 (see FIG. 7) used in this example will be described below. The expansion / contraction section 210 was composed of only a voltage expansion / contraction member 211 having a length in the first direction Z of 50.0 mm. The voltage expansion / contraction member 211 had the same configuration as the voltage expansion / contraction member 110 except for its length in the first direction Z. A bending member 220 was used, which included a first bending portion 221 and a second bending portion 222 having central portions 2211 and 2221 with a length of 14.0 mm in the first direction Z. The bending member 220 was made of the same material as the bending member 12. The bending member 220 had the same configuration as the bending member 12 except for the central portions 2211 and 2221. An elastic member 240 having a length of 78.0 mm in the first direction Z was used. The portions of the elastic member 240 attached to the central portions 2211, 2221 of the first bent portion 221 and the second bent portion 222 were 12.0 mm shorter than the elastic member 40. The elastic member 240 had the same configuration as the elastic member 40 except for the portions attached to the central portions 2211, 2221 of the first bent portion 221 and the second bent portion 222.

[0079] The movable member 20, the fixed member 30, and the base 50 used were the same as those used in the tactile presentation module 1 of FIG. 1 and the tactile presentation module 100 of FIG.

[0080] The stress applied to the tactile presentation module 1 in Fig. 1 due to a fall is shown in Fig. 8, and the stress applied to the tactile presentation module 100 in Fig. 7 is shown in Fig. 9. In Figs. 8 and 9, the horizontal axis indicates the position from one end of the voltage expansion / contraction member in the first direction Z.

[0081] 9, it was found that when the tactile presentation module 100 of FIG. 7 is dropped and hits a collision wall, a large stress is applied to both ends of the voltage expansion / contraction member 211 in the first direction Z. This is thought to be because when the tactile presentation module 100 of FIG. 7 hits a collision wall, the vibration device 200 and the movable member 20 rotate toward the collision wall around the fixed member 30 fixed to the base 50.

[0082] 8, it was found that the stress applied to both ends of the voltage expansion / contraction member 110 in the first direction is significantly reduced in the tactile presentation module 1 of FIG. 1 compared to the tactile presentation module 100 of FIG. 7. This is thought to be because when the tactile presentation module 1 collides with a collision wall and the vibration device 10 and the movable member 20 rotate toward the collision wall, the first connecting member 111 and the third connecting member 113 bend in the second direction X before the voltage expansion / contraction member 110. In other words, it was found that the stress applied to the voltage expansion / contraction member 110 is reduced by providing the first connecting member 111 and the third connecting member 113, which are more likely to bend in the second direction X than the voltage expansion / contraction member 110, at both ends of the first direction Z of the expandable section 11, to which a large stress is applied when colliding with a collision wall.

[0083] Any of the various embodiments or modifications described above can be combined appropriately to achieve the effects of each. In addition, combinations of embodiments, combinations of examples, or combinations of embodiments and examples are possible, and combinations of features from different embodiments or examples are also possible.

[0084] Although the present invention has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will become apparent to those skilled in the art, and it is to be understood that such changes and modifications are included within the scope of the present invention as defined by the appended claims unless they depart therefrom. [Explanation of symbols]

[0085] 1. Tactile presentation module 10 Vibration device 11 Telescopic part 110 Voltage expansion member 111 first connecting member 112 second connecting member 113 Third connecting member 114 Fourth connecting member 12 Flexural members 121 1st bending part 1211 Central part 1212 First side 1213 Second side 122 2nd bending part 1221 Central part 1222 First side 1223 Second side 123 First Intermediate Section 124 Second Intermediate Section 125 Connection section 126 Components 20 Movable parts 21 Cushion 30 Fixing member 40 Elastic member 50 pedestal 51 Board surface

Claims

1. an expansion / contraction section including a voltage expansion / contraction member that expands and contracts in a first direction; a bending member that bends in response to expansion and contraction of the voltage expansion / contraction member; Equipped with The bending member is a first bent portion located on one side of the stretchable portion in a second direction intersecting the first direction and extending from one end to the other end of the stretchable portion in the first direction; a second bent portion located on the other side of the stretchable portion in the second direction and extending from one end of the stretchable portion to the other end in the first direction; a first intermediate portion to which one ends of the first bent portion, the second bent portion, and the stretchable portion in the first direction are connected; a second intermediate portion to which the other ends of the first bent portion, the second bent portion, and the stretchable portion in the first direction are connected; Including, The stretchable portion is at least one first connection member located between the voltage expansion / contraction member and the first intermediate portion in the first direction and constituting one end of the expansion / contraction portion in the first direction; The first connecting member is A vibration device configured to be less likely to expand and contract in the first direction and more likely to bend in the second direction than the voltage expansion / contraction member.

2. The vibration device according to claim 1 , wherein the first connection member has a dimension in the second direction that is smaller than the dimension of the voltage expansion / contraction member.

3. The stretchable portion is a second connection member located between the voltage expansion / contraction member and the first connection member in the first direction and connecting the voltage expansion / contraction member and the first connection member; The vibration device according to claim 2 , wherein the second connecting member has a dimension in the second direction that is larger than that of the first connecting member.

4. The stretchable portion is at least one third connection member located between the voltage expansion / contraction member and the second intermediate portion in the first direction and constituting the other end of the expansion / contraction portion in the first direction; The third connecting member is The vibration device according to any one of claims 1 to 3, which is configured to be less flexible in the first direction and more flexible in the second direction than the voltage expansion / contraction member.

5. The stretchable portion is a fourth connection member located between the voltage expansion / contraction member and the third connection member in the first direction and connecting the voltage expansion / contraction member and the third connection member; The vibration device according to claim 4 , wherein the fourth connecting member has a dimension in the second direction that is larger than that of the third connecting member.

6. The stretchable portion is The vibration device according to any one of claims 1 to 3, comprising a plurality of the first connection members arranged at intervals in a third direction that intersects the first direction and the second direction.

7. The stretchable portion The vibration device according to claim 1, further comprising a plurality of the first connection members arranged at intervals in the second direction.

8. The vibration device according to any one of claims 1 to 3, a movable member attached to the first bending portion and movable in the second direction; a fixing member attached to the second bending portion; A tactile presentation module comprising:

9. The tactile presentation module according to claim 8 , further comprising an elastic member that biases the movable member and the fixed member toward each other along the second direction.

10. The tactile presentation module according to claim 8 , wherein the first bent portion and the second bent portion bias the first intermediate portion and the second intermediate portion in directions away from each other.

Images