Sensor and holding load detection device

Abstract

This sensor is provided with: a piezoelectric film having a first main surface and a second main surface; a first electrode provided on the first main surface; a second electrode provided on the second main surface; the first electrode and the second electrode include a first portion that overlaps with each other and overlaps with the piezoelectric thin film when viewed in a first direction, the first electrode and the second electrode include a second portion that overlaps with each other and does not overlap with the piezoelectric thin film when viewed in the first direction, and the first portion and the second portion are arranged in a second direction orthogonal to the first direction. The wiring portion includes: a wiring substrate that overlaps the second portion when viewed in the first direction and has a third main surface and a fourth main surface; a first conductor provided on the third main surface and electrically connected to the first electrode; and a second conductor provided on the fourth main surface and electrically connected to the second electrode.

Description

Technical Field

[0001] The present invention relates to a sensor and a grip load detection device including the sensor. Background Art

[0002] As an invention related to a conventional sensor, for example, a piezoelectric film sensor described in Patent Document 1 is known. The piezoelectric film sensor described in Patent Document 1 includes a sensor unit, a circuit unit, and a holding member. The sensor unit outputs a piezoelectric voltage corresponding to the strain amount of the piezoelectric film from an output conductor pattern. The circuit unit includes an input conductor pattern that inputs the piezoelectric voltage output from the output conductor pattern. The holding member holds the sensor unit and the circuit unit in a state where the output conductor pattern and the input conductor pattern are electrically connected.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2016 / 27615 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In the piezoelectric film sensor described in Patent Document 1, there is a desire to reduce the total area of ​​the portion where the output conductor pattern of the sensor portion and the input conductor pattern of the circuit portion are connected when viewed in the normal direction of the main surface of the sensor portion.

[0008] Therefore, an object of the present invention is to provide a sensor capable of reducing the area of ​​a portion where an output conductor of a sensor portion and an input conductor of a circuit portion are connected when viewed in a normal direction to a principal surface of the sensor portion, and a grip load detection device including the sensor.

[0009] Solutions for solving problems

[0010] A sensor according to one embodiment of the present invention comprises:

[0011] A piezoelectric film having a first main surface and a second main surface facing each other in a first direction;

[0012] a first electrode disposed on the first main surface;

[0013] a second electrode provided on the second main surface; and

[0014] Wiring Department,

[0015] The first electrode and the second electrode include first portions that overlap each other and overlap the piezoelectric film when viewed along the first direction.

[0016] The first electrode and the second electrode include second portions that overlap each other and do not overlap the piezoelectric film when viewed along the first direction.

[0017] The first portion and the second portion are arranged in a second direction orthogonal to the first direction,

[0018] The wiring portion includes:

[0019] a wiring substrate which is an insulator, overlaps with the second portion when viewed along the first direction, and has a third main surface and a fourth main surface which are opposite to each other in the first direction;

[0020] a first conductor provided on the third main surface and electrically connected to the first electrode; and

[0021] A second conductor is provided on the fourth main surface and is electrically connected to the second electrode.

[0022] Effects of the Invention

[0023] According to the sensor of the present invention, it is possible to reduce the connection area between the output conductor of the sensor section and the input conductor of the circuit section when viewed in the normal direction of the main surface of the sensor section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a plan view of the sensor 100 according to the first embodiment when viewed along the Z-direction.

[0025] Figure 2 It is a cross-sectional view when the sensor unit 1 according to the first embodiment is viewed along the Y+ direction.

[0026] Figure 3 It is a plan view when the piezoelectric film 11 according to the first embodiment is viewed along the Z-direction.

[0027] Figure 4 It is a plan view when the sensor unit 1 according to the first embodiment is viewed along the Z-direction.

[0028] Figure 5 It is a plan view when the wiring portion 2 of the first embodiment is viewed along the Z-direction.

[0029] Figure 6 This is a cross-sectional view of the wiring portion 2 according to the first embodiment as viewed along the Y+ direction.

[0030] Figure 7 It is a cross-sectional view of the sensor 100 according to the first embodiment, taken along the line AA.

[0031] Figure 8 It is a plan view when the wiring portion 2 and the second portion P2 of the first embodiment are viewed along the Z-direction.

[0032] Fig. 9 1 is a plan view of the sensor 1000 of the comparative example as viewed along the Z-direction.

[0033] Fig.10 BB is a cross-sectional view of the sensor 1000 of the comparative example.

[0034] Fig.11 1 is a cross-sectional view taken along CC of a sensor 1000 according to a comparative example.

[0035] Fig.12 It is a perspective view of the grip load detection device 200 according to the first embodiment.

[0036] Fig.13 It is a cross-sectional view of the grip load detection device 200 according to the first embodiment, taken along line DD.

[0037] Fig.14 This is a plan view of the grip load detection device 200 according to the first embodiment when viewed along the Z-direction.

[0038] Fig.15 It is a cross-sectional view of the grip load detection device 200 according to the first embodiment, taken along line EE.

[0039] Fig.16 This is a plan view of the transmissive casing 3 , the first handle 4L, the second handle 4R, and the light emitting body 5 according to the first embodiment when viewed along the Z-direction.

[0040] Fig.17 It is a diagram showing the transparent area ATP and the non-transparent area ANTP of the sensor unit 1 according to the first embodiment.

[0041] Fig.18 It is a plan view of the sensor 100a according to the first modification example when viewed along the Z-direction.

[0042] Fig.19 It is a plan view when the sensor unit 1 according to the first modification is viewed along the Z-direction.

[0043] Fig. 20 It is a perspective view of a grip load detection device 200a according to a first modified example.

[0044] Fig.21 1 is a diagram showing a transparent area ATP and a non-transparent area ANTP of a sensor 100 a according to a first modification.

[0045] Fig. 22 It is a plan view of the sensor 100b according to the second modification example when viewed along the Z-direction.

[0046] Fig.23 It is a perspective view of a grip load detection device 200b according to a second modification.

[0047] Fig.24 It is a plan view of the grip load detection device 200b according to the second modification example when viewed along the Z-direction. DETAILED DESCRIPTION

[0048] [First embodiment]

[0049] (Structure of sensor 100)

[0050] Below, while referring to the attached Figure 1 The structure of the sensor 100 according to the first embodiment of the present invention will be described. Figure 1 It is a plan view of the sensor 100 according to the first embodiment when viewed along the Z-direction. Figure 2 It is a cross-sectional view when the sensor unit 1 according to the first embodiment is viewed along the Y+ direction. Figure 3 It is a plan view when the piezoelectric film 11 according to the first embodiment is viewed along the Z-direction. Figure 4 It is a plan view when the sensor unit 1 according to the first embodiment is viewed along the Z-direction. Figure 5 It is a plan view when the wiring portion 2 of the first embodiment is viewed along the Z-direction. Figure 6 This is a cross-sectional view of the wiring portion 2 according to the first embodiment as viewed along the Y+ direction. Figure 7 It is a cross-sectional view of the sensor 100 according to the first embodiment, taken along the line AA. Figure 8 It is a plan view when the wiring portion 2 and the second portion P2 of the first embodiment are viewed along the Z-direction. Fig. 9 1 is a plan view of the sensor 1000 of the comparative example as viewed along the Z-direction. Fig.10 BB is a cross-sectional view of the sensor 1000 of the comparative example. Fig.11 1 is a cross-sectional view taken along CC of a sensor 1000 according to a comparative example.

[0051] In this specification, the X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other. The Z-axis direction corresponds to the "first direction" of the present invention. The X-axis direction corresponds to the "second direction" of the present invention. The Y-axis direction corresponds to the "third direction" of the present invention. In addition, the X+ direction is the positive direction of the X-axis. The X-direction is the negative direction of the X-axis. The Y+ direction is the positive direction of the Y-axis. The Y-direction is the negative direction of the Y-axis. The Z+ direction is the positive direction of the Z-axis. The Z-direction is the negative direction of the Z-axis. In addition, the Z-axis direction is an example of the "first direction" of the present invention. The X-axis direction is an example of the "second direction" of the present invention. The Y-axis direction is an example of the "third direction" of the present invention.

[0052] In this specification, "object 10 is transparent" means that when the object 10 is observed from a position closer to the Y-direction than the object 10, the inside of the object 10 and the part closer to the Y+ direction than the object 10 can be seen through. This definition also applies to when the object 10 is observed from a position closer to the Y-direction than the object 10. In addition, this definition also applies to objects and regions other than the object 10.

[0053] The sensor 100 is a sensor for detecting the deformation of the object to be measured. Figure 1 As shown in FIG. 1 , the sensor 100 includes a sensor unit 1 and a wiring unit 2. Figure 2 As shown in FIG. 1 , the sensor unit 1 includes a piezoelectric film 11, a first electrode 12, a second electrode 13, a first adhesive member 14, and a second adhesive member 15. Figure 2 As shown, the sensor unit 1 has a first main surface US1 and a second main surface DS1. The first main surface US1 and the second main surface DS1 face each other in the Z-axis direction. The first main surface US1 is located closer to the second main surface DS1 in the Z+ direction. The first main surface US1 and the second main surface DS1 are parallel to each other.

[0054] like Figure 2 As shown, the piezoelectric film 11 has a third principal surface US11 and a fourth principal surface DS11. The third principal surface US11 and the fourth principal surface DS11 are opposite to each other in the Z-axis direction. The third principal surface US11 corresponds to the "first principal surface" of the present invention. The fourth principal surface DS11 corresponds to the "second principal surface" of the present invention. The third principal surface US11 is located closer to the Z+ direction than the fourth principal surface DS11. The third principal surface US11 and the fourth principal surface DS11 are parallel to each other. The third principal surface US11 and the fourth principal surface DS11 have a rectangular shape when viewed along the Z-axis direction. The third principal surface US11 and the fourth principal surface DS11 have a long side extending along the X-axis direction and a short side extending along the Y-axis direction, respectively.

[0055] The piezoelectric film 11 is transparent. In addition, the piezoelectric film 11 has high flexibility. In addition, the piezoelectric film 11 generates electric charge according to the amount of deformation of the piezoelectric film 11. In this embodiment, the piezoelectric film 11 is a PLLA film. The piezoelectric film 11 will be described in more detail below.

[0056] The piezoelectric film 11 has the following characteristics: the polarity of the charge generated when the piezoelectric film 11 is stretched in a direction 45 degrees relative to the X-axis direction is opposite to the polarity of the charge generated when the piezoelectric film 11 is stretched in a direction 45 degrees relative to the Y-axis direction. Specifically, the piezoelectric film 11 is a film formed of a chiral polymer. An example of a chiral polymer is polylactic acid (PLA), in particular L-type polylactic acid (PLLA). The main chain of PLLA composed of a chiral polymer has a helical structure. PLLA has piezoelectricity that is oriented by uniaxial stretching. The piezoelectric film 11 has a piezoelectric constant of d14. As Figure 3 As shown, the uniaxial stretching direction (orientation direction) OD of the piezoelectric film 11 forms an angle of 0 degrees with respect to the X-axis direction. The 0 degrees includes, for example, an angle of about 0 degrees ± 10 degrees. When the piezoelectric film 11 is twisted, the piezoelectric film 11 stretches in a direction of 45 degrees with respect to the X-axis direction and the Y-axis direction, generating electric charge. The magnitude of the electric charge depends on the twisting amount of the piezoelectric film 11.

[0057] The first electrode 12 is a ground electrode. The first electrode 12 is electrically connected to the ground potential. Figure 2 As shown, the first electrode 12 includes a first substrate 121 and a first conductive film 122. The first conductive film 122 covers the end surface in the Z-direction of the first substrate 121. The first conductive film 122 is electrically connected to the ground potential.

[0058] The first electrode 12 is transparent. In addition, the first electrode 12 has high flexibility. The first substrate 121 is, for example, a PET (polyethylene terephthalate) film. The first conductive film 122 is, for example, a transparent conductive film. The material of the first conductive film 122 is, for example, ITO (indium tin oxide).

[0059] The first electrode 12 is provided on the third main surface US11. Figure 2 As shown, the first electrode 12 is provided at a position closer to the Z+ direction than the first adhesive member 14 provided on the third main surface US11. The first electrode 12 is fixed at a position closer to the Z+ direction than the third main surface US11 by the first adhesive member 14. The first electrode 12 covers the end surface of the first adhesive member 14 in the Z+ direction. The first conductive film 122 is located between the first substrate 121 and the first adhesive member 14. In addition, the first main surface US1 of the sensor 100 is the end surface of the first electrode 12 in the Z+ direction.

[0060] The first adhesive material 14 is transparent. The first adhesive material 14 is, for example, an optically transparent adhesive sheet. The first adhesive material 14 fixes the first conductive film 122 to a position closer to the third principal surface US11 in the Z+ direction.

[0061] The second electrode 13 is a signal electrode. The second electrode 13 outputs a deformation detection signal SigD corresponding to the deformation of the piezoelectric film 11. Figure 2 As shown, the second electrode 13 includes a second base material 131 and a second conductive film 132. The second conductive film 132 covers the end surface of the second base material 131 in the Z+ direction. The second conductive film 132 outputs a deformation detection signal SigD corresponding to the deformation of the piezoelectric film 11.

[0062] The second electrode 13 is transparent. In addition, the second electrode 13 has high flexibility. The second substrate 131 is, for example, a PET (polyethylene terephthalate) film. The second conductive film 132 is, for example, a transparent conductive film. The material of the second conductive film 132 is, for example, ITO (indium tin oxide).

[0063] The second electrode 13 is provided on the fourth main surface DS11. Figure 2 As shown, the second electrode 13 is provided at a position closer to the Z-direction than the second adhesive member 15 provided on the fourth main surface DS11. The second electrode 13 is fixed at a position closer to the Z-direction than the fourth main surface DS11 by the second adhesive member 15. The second electrode 13 covers the end surface of the second adhesive member 15 in the Z-direction. The second conductive film 132 is located between the second substrate 131 and the second adhesive member 15. In addition, the second main surface DS1 of the sensor 100 is the end surface of the second electrode 13 in the Z-direction.

[0064] The second adhesive material 15 is transparent. The second adhesive material 15 is, for example, an optically transparent adhesive sheet. The second adhesive material 15 fixes the second conductive film 132 to a position closer to the fourth main surface DS11 in the Z-direction.

[0065] like Figure 2 and Figure 4 As shown, the first electrode 12 and the second electrode 13 overlap each other when viewed in the Z-axis direction. In addition, the first electrode 12 and the second electrode 13 each have a first portion P1 that overlaps with the piezoelectric film 11. Therefore, the first portion P1 is transparent. In addition, the first electrode 12 and the second electrode 13 overlap each other when viewed in the Z-axis direction. In addition, the first electrode 12 and the second electrode 13 each have a second portion P2 that does not overlap with the piezoelectric film 11. Therefore, the second portion P2 is transparent.

[0066] The outer edge of the first portion P1 coincides with the outer edge of the piezoelectric film 11 when viewed along the Z-axis direction. Figure 4As shown, the first part P1 has a rectangular shape when observed along the Z-axis direction. In addition, the first part P1 has a long side extending along the X-axis direction and a short side extending along the Y-axis direction when observed along the Z-axis direction. That is, the first part P1 has a first side SI1 and a second side SI2 extending along the X-axis direction and a third side SI3 and a fourth side SI4 extending along the Y-axis direction when observed along the Z-axis direction. The first side SI1 is located closer to the Y+ direction than the second side SI2. In addition, the third side SI3 is located closer to the Y- direction than the fourth side SI4. Therefore, the first part P1 includes the first side SI1 as the first end in the Y+ direction and includes the second side SI2 as the second end in the Y- direction.

[0067] like Figure 4 As shown, the second part P2 has a rectangular shape when viewed along the Z-axis direction. In addition, the second part P2 has a long side extending along the X-axis direction and a short side extending along the Y-axis direction when viewed along the Z-axis direction. That is, the second part P2 has a fifth side SI5 and a sixth side SI6 extending along the X-axis direction and has a seventh side SI7 and an eighth side SI8 extending along the Y-axis direction when viewed along the Z-axis direction. Therefore, the second part P2 includes the fifth side SI5 as the third end in the Y+ direction and includes the sixth side SI6 as the fourth end in the Y-direction.

[0068] like Figure 4 As shown, the first portion P1 and the second portion P2 are arranged in the X-axis direction. In addition, the length of the second portion P2 in the Y-axis direction is shorter than the length of the first portion P1 in the Y-axis direction.

[0069] like Figure 4 As shown, the first side SI1 of the first part P1 is located closer to the Y+ direction than the fifth side SI5 of the second part P2 when viewed along the Z-axis direction. That is, the first end of the first part P1 is located closer to the Y+ direction than the third end of the second part P2 when viewed along the Z-axis direction.

[0070] like Figure 4 As shown, the second side SI2 of the first part P1 is located closer to the Y-direction than the sixth side SI6 of the second part P2 when viewed along the Z-axis direction. That is, the second end of the first part P1 is located closer to the Y-direction than the fourth end of the second part P2 when viewed along the Z-axis direction.

[0071] like Figure 5 As shown in the figure, the wiring section 2 includes a wiring substrate 21, a first conductor 22, a second conductor 23, a first conductive adhesive 24, and a second conductive adhesive 25. In addition, the first conductive adhesive 24 is an example of the "first conductive adhesive" of the present invention. In addition, the second conductive adhesive 25 is an example of the "second conductive adhesive" of the present invention.

[0072] like Figure 1 As shown in FIG. 1 , the wiring substrate 21 overlaps with the second portion P2 when viewed along the Z-axis direction. Figure 5 As shown, the wiring substrate 21 has a 5th main surface US21 and a 6th main surface DS21 which are opposite to each other in the Z-axis direction. The 5th main surface US21 corresponds to the "3rd main surface" of the present invention. The 6th main surface DS21 corresponds to the "4th main surface" of the present invention. The 5th main surface US21 is located closer to the Z+ direction than the 6th main surface DS21. The 5th main surface US21 and the 6th main surface DS21 are parallel to each other. The 5th main surface US21 and the 6th main surface DS21 have a rectangular shape when viewed along the Z-axis direction. The 5th main surface US21 and the 6th main surface DS21 have a long side extending along the X-axis direction and a short side extending along the Y-axis direction, respectively. The wiring substrate 21 is a flexible substrate with flexibility. In addition, the wiring substrate 21 is an insulator.

[0073] The first conductor 22 is a grounding wire. The first conductor 22 is electrically connected to the ground potential. Figure 6 As shown, the first conductor 22 is provided on the fifth main surface US21.

[0074] The second conductor 23 is a signal line. The second conductor 23 is electrically connected to an input terminal of an operation circuit (not shown). Figure 6 As shown, the second conductor 23 is provided on the sixth main surface DS21.

[0075] The first conductive adhesive member 24 has conductivity. Figure 1 As shown in FIG. 1 , the first conductive adhesive member 24 overlaps with the second portion P2 when viewed along the Z-axis direction. Figure 6 As shown, the first conductive adhesive member 24 is provided on the end surface in the Z+ direction of the first conductor 22. The first conductive adhesive member 24 fixes the first electrode 12 at a position closer in the Z+ direction than the end surface in the Z+ direction of the first conductor 22. Thus, the first conductor 22 is electrically connected to the first electrode 12 via the first conductive adhesive member 24.

[0076] The second conductive adhesive member 25 has conductivity. Figure 1 As shown in FIG. 1 , the second conductive adhesive member 25 overlaps with the second portion P2 when viewed along the Z-axis direction. Figure 6 As shown in FIG. 1 , the second conductive adhesive member 25 is provided on the end surface in the Z-direction of the second conductor 23. The second conductive adhesive member 25 fixes the second electrode 13 at a position closer in the Z-direction than the end surface in the Z-direction of the second conductor 23. Thus, the second conductor 23 is electrically connected to the second electrode 13 via the second conductive adhesive member 25.

[0077] like Figure 7As shown, the first electrode 12, the first conductive adhesive 24, the first conductor 22, the wiring substrate 21, the second conductor 23, the second conductive adhesive 25, and the third portion P3 of the second electrode 13 overlapping the second portion P2 when viewed along the Z-axis direction are arranged in sequence along the Z-axis direction. Therefore, the first electrode 12, the first conductive adhesive 24, the wiring substrate 21, the second conductive adhesive 25, and the third portion P3 of the second electrode 13 overlapping the second portion P2 when viewed along the Z-axis direction are arranged in sequence along the Z-axis direction. In addition, a part of the third portion P3 coincides with a part of the second portion P2. The third portion P3 corresponds to the "fifth portion" of the present invention.

[0078] Here, if Figure 8 As shown in FIG. 1 , the position in the X-axis direction where the third portion P3 is located when viewed in the Z-axis direction is defined as the first position PO1. The first position PO1 may be any position in the X-axis direction where the third portion P3 is located.

[0079] like Figure 8 As shown, a length L21 of the wiring substrate 21 in the Y-axis direction at the first position PO1 is longer than a length LP2 of the second portion P2 in the Y-axis direction at the first position PO1.

[0080] like Figure 8 As shown, a length L24 of the first conductive adhesive material 24 in the Y-axis direction at the first position PO1 is shorter than a length LP2 of the second portion P2 in the Y-axis direction at the first position PO1.

[0081] like Figure 8 As shown, a length L25 of the second conductive adhesive material 25 in the Y-axis direction at the first position PO1 is shorter than a length LP2 of the second portion P2 in the Y-axis direction at the first position PO1.

[0082] [Effect]

[0083] According to the sensor 100, the connection area between the output conductor of the sensor unit 1 and the input conductor of the circuit unit when viewed in the normal direction of the main surface of the sensor unit 1 can be reduced. First, the sensor 1000 of the comparative example is described. In addition, with respect to the sensor 1000 of the comparative example, only the parts that are different from the sensor 100 of the first embodiment are described, and the rest are omitted. Figures 9 to 11As shown, in the sensor 1000 of the comparative example, the first electrode 12 and the second electrode 13 do not have the second portion P2. In more detail, at the end portion in the X-direction of the sensor portion 1 (the end in the X-direction of the sensor portion 1 and its vicinity), when viewed in the Z-axis direction, the first electrode 12 and the second electrode 13 do not overlap with each other. At the end portion in the X-direction of the sensor portion 1, when viewed in the Z-direction, the first electrode 12 is located at the half of the sensor portion 1 in the Y+ direction. At the end portion in the X-direction of the sensor portion 1, when viewed in the Z-direction, the second electrode 13 is located at the half of the sensor portion 1 in the Y-direction. That is, at the end portion in the X-direction of the sensor portion 1, when viewed in the Z-direction, the first electrode 12 and the second electrode 13 are arranged in the Y-direction. As shown in FIG. Fig.10 As shown in FIG. 1 , the first electrode 12 is electrically connected to the first conductor 22 via the first conductive adhesive 24. Fig. 9 As shown in FIG. 1 , the connection area between the first electrode 12 and the first conductor 22 when viewed along the Z-axis direction (the normal direction of the first main surface US1 of the sensor unit 1) is denoted as S1. Fig.11 As shown in FIG. 1 , the second electrode 13 is electrically connected to the second conductor 23 via the second conductive adhesive 25. Fig. 9 As shown in FIG. 1 , the connection area between the second electrode 13 and the second conductor 23 when viewed along the Z-axis direction (the normal direction of the first main surface US1 of the sensor portion 1) is set to S2. Therefore, in the sensor 1000 of the comparative example, the connection area between the first electrode 12 and the second electrode 13 of the sensor portion 1 and the first conductor 22 and the second conductor 23 of the wiring portion 2 when viewed along the normal direction of the first main surface US1 of the sensor portion 1 is S1+S2.

[0084] On the other hand, in the sensor 100 of the first embodiment, the first electrode 12 and the second electrode 13 include a second portion P2 that overlaps with each other when viewed in the Z-axis direction and does not overlap with the piezoelectric film 11. The first electrode 12 and the second electrode 13 are electrically connected to the first conductor 22 and the second conductor 23 in a region that overlaps with the second portion P2 when viewed in the Z-axis direction and is located between the first electrode 12 and the second electrode 13 when viewed in the X-axis direction. As a result, the connection region between the first electrode 12 and the first conductor 22 and the connection region between the second electrode 13 and the second conductor 23 can overlap with each other when viewed in the Z-axis direction. Therefore, in the case of Figure 1As shown, when the connection area between the first electrode 12 and the first conductor 22 when observed along the Z-axis direction (the normal direction of the first main surface US1 of the sensor portion 1) is set to S1, and the connection area between the second electrode 13 and the second conductor 23 when observed along the Z-axis direction (the normal direction of the first main surface US1 of the sensor portion 1) is set to S2, in the sensor 100 of the first embodiment, the connection area between the first electrode 12 and the second electrode 13 of the sensor portion 1 and the first conductor 22 and the second conductor 23 of the wiring portion 2 when observed along the normal direction of the first main surface US1 of the sensor portion 1 is S1 or S2. When the outer edge of the connection region between the second electrode 13 and the second conductor 23 when viewed in the Z-axis direction coincides with the outer edge of the connection region between the first electrode 12 and the first conductor 22 when viewed in the Z-axis direction, or is surrounded by the outer edge of the connection region between the first electrode 12 and the first conductor 22 when viewed in the Z-axis direction, the total connection area between the first electrode 12 and the second electrode 13 of the sensor unit 1 and the first conductor 22 and the second conductor 23 of the wiring unit 2 when viewed in the normal direction of the first main surface US1 of the sensor unit 1 is S1. Therefore, according to the sensor 100, the connection area between the output conductor of the sensor unit 1 and the input conductor of the circuit unit when viewed in the normal direction of the main surface of the sensor unit 1 can be made smaller than the connection area between the output conductor of the sensor unit 1 and the input conductor of the circuit unit when viewed in the normal direction of the main surface of the sensor unit 1 in the sensor 1000 of the comparative example.

[0085] (Structure of the holding load detection device 200)

[0086] Below, while referring to the attached Figure 1 The structure of the grip load detection device 200 according to the first embodiment of the present invention will be described. Fig.12 It is a perspective view of the grip load detection device 200 according to the first embodiment. Fig.13 It is a cross-sectional view of the grip load detection device 200 according to the first embodiment, taken along line DD. Fig.14 This is a plan view of the grip load detection device 200 according to the first embodiment when viewed along the Z-direction. Fig.15 It is a cross-sectional view of the grip load detection device 200 according to the first embodiment, taken along line EE. Fig.16 This is a plan view of the transmissive casing 3 , the first handle 4L, the second handle 4R, and the light emitting body 5 according to the first embodiment when viewed along the Z-direction. Fig.17 It is a diagram showing the transparent area ATP and the non-transparent area ANTP of the sensor unit 1 according to the first embodiment.

[0087] like Fig.12 As shown, the grip load detection device 200 includes a transmissive housing 3, a first handle 4L, a second handle 4R, a sensor 100, a light emitting body 5, and a calculation circuit (not shown).

[0088] The transmissive housing 3 has a cylindrical shape. Fig.12 As shown in FIG. 1 , the transmissive housing 3 has a square tube shape, and the axial direction of the square tube shape is the X-axis direction.

[0089] The outer side surface OS3 of the transmissive shell 3 includes a polygonal plane. Fig.13 As shown in FIG. 1 , the outer side surface OS3 of the transmissive shell 3 includes a quadrilateral plane. The outer side surface OS3 of the transmissive shell 3 includes a first plane OS31, a second plane OS32, a third plane OS33, and a fourth plane OS34. Fig.13 As shown, the first plane OS31 and the third plane OS33 are end faces in the Z-axis direction of the outer side surface OS3 of the transmissive shell 3, respectively. The first plane OS31 is an end face in the Z+ direction. The third plane OS33 is an end face in the Z-direction. The second plane OS32 and the fourth plane OS34 are end faces in the Y-axis direction of the outer side surface OS3 of the transmissive shell 3, respectively. The second plane OS32 is an end face in the Y+ direction. The fourth plane OS34 is an end face in the Y-direction. The shapes of the first plane OS31, the second plane OS32, the third plane OS33 and the fourth plane OS34 are rectangular shapes when observed along the normal direction of the first plane OS31, the second plane OS32, the third plane OS33 and the fourth plane OS34, respectively. The cross-section when observing the outer side surface OS3 of the transmissive shell 3 along the X-axis direction is a quadrilateral shape. The Z-axis direction and the Y-axis direction are one of the normal directions of the outer side surface OS3 of the transmissive shell 3, respectively.

[0090] like Fig.13 As shown, the inner side surface IS3 of the transmissive shell 3 includes a quadrilateral plane. More specifically, the inner side surface IS3 of the transmissive shell 3 includes four planes. The shape of each of the four planes is a rectangular shape when observed along the normal direction of each of the four planes. The cross-section when observing the inner side surface IS3 of the transmissive shell 3 along the X-axis direction is a quadrilateral shape.

[0091] The transmissive shell 3 has translucency. That is, when the transmissive shell 3 is observed from the outside, the hollow portion surrounded by the inner side surface IS3 of the transmissive shell 3 can be seen through. In addition, the light emitted by the light emitting body 5 provided in the hollow portion surrounded by the inner side surface IS3 of the transmissive shell 3 is emitted from the outer side surface OS3 of the transmissive shell 3.

[0092] like Fig.12 As shown, the first handle 4L includes a first handle portion LGP and a first connection portion LCP. The second handle 4R includes a second handle portion RGP and a second connection portion RCP. The user holds the first handle 4L and the second handle 4R. More specifically, the user holds the first handle portion LGP and the second handle portion RGP. Fig.12 As shown in FIG. 1 , the first handle 4L is attached to the end of the transmissive housing 3 in the X-direction by an adhesive member (not shown). The second handle 4R is attached to the end of the transmissive housing 3 in the X+ direction. In addition, the second handle 4R has a symmetrical structure with the first handle 4L. Therefore, the following description focuses on the first handle 4L, and the description of the second handle 4R is omitted. The materials of each of the first handle 4L and the second handle 4R are, for example, resin.

[0093] The first handle 4L covers a portion of the outer surface OS3 of the transmissive shell 3. Fig.12 As shown in the figure, the first connection part LCP is attached to the outer side surface OS3 of the transparent shell 3 in a manner covering the periphery of the end portion in the X-direction of the outer side surface OS3 of the transparent shell 3. That is, the end portion in the X-direction of the outer side surface OS3 of the transparent shell 3 is provided in the hollow portion surrounded by the inner side surface of the first connection part LCP. Thus, the user can twist the transparent shell 3 by holding the first handle part LGP and the second handle part RGP.

[0094] The sensor 100 is provided on the outer side surface OS3 of the transmissive housing 3. More specifically, the end surface of the second electrode 13 in the Z-direction is fixed to the outer side surface OS3 of the transmissive housing 3 via a transparent adhesive member (not shown). The adhesive member (not shown) is, for example, an optically transparent adhesive sheet. The adhesive member (not shown) covers the entire end surface of the second electrode 13 in the Z-direction. In addition, the adhesive member (not shown) is fixed to the outer side surface OS3 of the transmissive housing 3.

[0095] like Fig.12 As shown, the sensor 100 is provided in such a manner that the long side of the third principal surface US11 of the piezoelectric film 11 extends in the X-axis direction and the short side of the third principal surface US11 of the piezoelectric film 11 spans across multiple planes of the outer surface OS3. The short side of the third principal surface US11 of the piezoelectric film 11 surrounds the X-axis direction when viewed in the X-axis direction.

[0096] The piezoelectric film 11 is deformed when the user twists the transparent casing 3. Therefore, the sensor 100 outputs a deformation detection signal SigD according to the twist amount of the transparent casing 3. The deformation detection signal SigD output by the sensor 100 is input to a calculation circuit (not shown).

[0097] like Fig.14 As shown, the first portion P1 is arranged in a first region A1 that does not overlap with the first handle 4L and the second handle 4R when viewed in the Z-axis direction.

[0098] like Fig.14As shown in FIG. 1 , the second portion P2 and the wiring portion 2 are arranged in the second area A2 overlapping with the first handle 4L when viewed along the Z-axis direction. More specifically, the second portion P2 and the wiring portion 2 are arranged in an area overlapping with the first connecting portion LCP when viewed along the Z-axis direction. That is, the second portion P2 and the wiring portion 2 are provided in a hollow portion surrounded by the inner side surface of the first connecting portion LCP. Therefore, the second portion P2 and the wiring portion 2 are not arranged in the first area A1.

[0099] The second portion P2 is disposed on a plane of the outer side surface OS3 of the transmissive shell 3. Fig.15 As shown, the second portion P2 is provided on the first plane OS31 of the outer side surface OS3 of the transparent casing 3. In the present embodiment, the length of the second portion P2 in the Y-axis direction is equal to the length of the first plane OS31 in the Y-axis direction.

[0100] The light emitting body 5 is a light emitting diode (LED). The light emitting body 5 emits light by current flowing through the light emitting body 5. Fig.12 As shown, the light emitting body 5 is disposed in the hollow portion surrounded by the inner side surface IS3 of the transmissive shell 3. Fig.16 As shown, the light emitting body 5 is arranged in the first area A1.

[0101] The operation circuit (not shown) controls the current flowing through the light-emitting body 5 based on the input deformation detection signal SigD. For example, a determination value is set in advance in the operation circuit (not shown). The operation circuit (not shown) allows the current to flow through the light-emitting body 5, for example, when the deformation detection signal SigD is equal to or greater than the determination value. That is, the light-emitting body 5 emits light based on the deformation detection signal SigD.

[0102] The calculation circuit (not shown) is provided in the hollow portion surrounded by the inner side surface IS3 of the transparent casing 3. The calculation circuit (not shown) is arranged in the second area A2. In addition, the calculation circuit (not shown) is not arranged in the first area A1.

[0103] [Effect]

[0104] According to the sensor 100, the non-transparent area ANTP can be reduced. Fig.17 The transparent area ATP and the non-transparent area ANTP of the sensor unit 1 are described. The non-transparent area ANTP of the sensor unit 1 is defined as follows. First, for the first side SI1 of the first part P1 and the second side SI2 of the first part P1, as shown in FIG. Fig.17 As shown in FIG. 1 , the sensor 100 is bent so that the first side SI1 of the first portion P1 and the second side SI2 of the first portion P1 are aligned with each other. Fig.17In the example, the first part P1 has a cylindrical shape. The axial direction of the cylindrical shape is the X-axis direction. Here, the first conductor 22 and the second conductor 23 are opaque. The position in the X-axis direction where the first conductor 22 or the second conductor 23 is located is defined as a non-transparent position. The non-transparent area ANTP is a portion of the sensor 100 located at a non-transparent position. The non-transparent area ANTP is opaque when observed in a direction orthogonal to the X-axis direction (for example, the Z-axis direction). On the other hand, the first part P1 and the second part P2 are transparent. Among the positions in the X-axis direction where the first part P1 and the second part P2 are located, the positions in the X-axis direction where the first conductor 22 and the second conductor 23 are not located are defined as transparent positions. The transparent area ATP is a portion of the sensor 100 located at a transparent position. The transparent area ATP is transparent when observed in a direction orthogonal to the X-axis direction (for example, the Z-axis direction).

[0105] Therefore, according to the sensor 100, the length of the second portion P2 in the Y-axis direction is shorter than the length of the first portion P1 in the Y-axis direction. As a result, the area of ​​the non-transparent region ANTP when viewed along the Z-axis direction can be made smaller than the area of ​​the non-transparent region ANTP when viewed along the Z-axis direction when the length of the second portion P2 in the Y-axis direction is not shorter than the length of the first portion P1 in the Y-axis direction. As a result, according to the sensor 100, the non-transparent region ANTP can be reduced.

[0106] According to the sensor 100, the area of ​​the sensor 100 can be reduced when viewed in the normal direction of the main surface of the sensor unit 1. In more detail, the first conductor 22 is provided on the fifth main surface US21 of the wiring substrate 21. The second conductor 23 is provided on the sixth main surface DS21 of the wiring substrate 21. The first electrode 12, the first conductive adhesive 24, the first conductor 22, the wiring substrate 21, the second conductor 23, the second conductive adhesive 25, and the third portion P3 of the second electrode 13 overlapping the second portion P2 when viewed in the Z-axis direction are arranged in sequence along the Z-axis direction. Therefore, by arranging the first conductor 22 and the second conductor 23 so as to overlap when viewed along the Z-axis direction (the normal direction of the first main surface US1 of the sensor unit 1), the area of ​​the sensor 100 when viewed along the normal direction of the main surface of the sensor unit 1 can be made smaller than the area of ​​the sensor 100 when viewed along the normal direction of the main surface of the sensor unit 1 when the first conductor 22 and the second conductor 23 are arranged so as not to overlap when viewed along the Z-axis direction.

[0107] According to the sensor 100, the first electrode 12 and the second electrode 13 can be suppressed from being electrically connected to each other. In more detail, the position in the X-axis direction where the third portion P3 is located is defined as the first position PO1. The length of the wiring substrate 21 in the Y-axis direction at the first position PO1 is longer than the length of the second portion P2 in the Y-axis direction at the first position PO1. Thus, even if the position of the wiring substrate 21 in the Y-axis direction is offset due to manufacturing deviation, the wiring substrate 21 can be located between the first electrode 12 and the second electrode 13. As a result, according to the sensor 100, the first electrode 12 and the second electrode 13 can be suppressed from being electrically connected to each other.

[0108] According to the sensor 100, it is possible to suppress the first conductive adhesive member 24 or the second conductive adhesive member 25 from being electrically connected to a device outside the sensor 100. More specifically, the length of the first conductive adhesive member 24 in the Y-axis direction at the first position PO1 is shorter than the length of the second portion P2 in the Y-axis direction at the first position PO1. Thus, even if the position of the first conductive adhesive member 24 in the Y-axis direction is offset due to manufacturing variation, the first conductive adhesive member 24 can overlap with the first electrode 12 and be located closer to the first electrode 12 in the Z-direction when viewed along the Z-axis direction. Therefore, it is possible to avoid the first conductive adhesive member 24 from being exposed in the Z-axis direction, and it is possible to suppress the first conductive adhesive member 24 from being electrically connected to a device outside the sensor 100. In addition, the length of the second conductive adhesive member 25 in the Y-axis direction at the first position PO1 is shorter than the length of the second portion P2 in the Y-axis direction at the first position PO1. Thus, even if the position of the second conductive adhesive member 25 in the Y-axis direction is offset due to manufacturing variations, the second conductive adhesive member 25 can overlap with the second electrode 13 when viewed in the Z-axis direction and be located closer to the second electrode 13 in the Z+ direction. Therefore, it is possible to avoid the second conductive adhesive member 25 being exposed in the Z-axis direction, and it is possible to suppress the second conductive adhesive member 25 from being electrically connected to a device outside the sensor 100. As a result, according to the sensor 100, it is possible to suppress the first conductive adhesive member 24 or the second conductive adhesive member 25 from being electrically connected to a device outside the sensor 100.

[0109] According to the grip load detection device 200, the inside of the portion of the transparent shell 3 that can be seen when the grip load detection device 200 is observed from the outside of the grip load detection device 200 can be made transparent. More specifically, the sensor 100 is provided on the outer side surface OS3 of the transparent shell 3. The first portion P1 is arranged in the first area A1 that does not overlap with the first handle 4L and the second handle 4R when observed along the Z-axis direction (the normal direction of the outer side surface OS3 of the transparent shell 3). The first area A1 is a portion of the transparent shell 3 that can be seen when the grip load detection device 200 is observed from the outside of the grip load detection device 200. The first portion P1 is transparent. Therefore, according to the grip load detection device 200, the inside of the portion of the transparent shell 3 that can be seen when the grip load detection device 200 is observed from the outside of the grip load detection device 200 can be made transparent.

[0110] According to the grip load detection device 200, it is possible to avoid the light emitted by the light emitting body 5 being blocked by the sensor 100. More specifically, the light emitting body 5 is arranged in the first area A1 which does not overlap with the first handle 4L and the second handle 4R when viewed along the Z-axis direction (the normal direction of the outer side surface OS3 of the transmissive shell 3). The light emitting body 5 emits light based on the deformation detection signal SigD. The first part P1 of the sensor 100 is arranged in the first area A1. The first part P1 is transparent. As a result, according to the grip load detection device 200, it is possible to avoid the light emitted by the light emitting body 5 being blocked by the sensor 100.

[0111] According to the grip load detection device 200, the sensor 100 can be easily positioned on the outer side surface OS3 of the transparent shell 3. More specifically, the outer side surface OS3 of the transparent shell 3 includes a polygonal plane. The second portion P2 is provided on one plane of the outer side surface OS3. In particular, in the present embodiment, the length of the second portion P2 in the Y-axis direction is equal to the length of the first plane OS31 in the Y-axis direction. In addition, the second portion P2 is provided on the first plane OS31 of the outer side surface OS3 of the transparent shell 3. Thus, the position of the second portion P2 is determined. Therefore, according to the grip load detection device 200, the sensor 100 can be easily positioned on the outer side surface OS3 of the transparent shell 3.

[0112] According to the grip load detection device 200, the twisting amount of the transparent shell 3 can be detected with higher accuracy. More specifically, the first electrode 12 is a ground electrode electrically connected to the ground potential. The second electrode 13 is a signal electrode that outputs a deformation detection signal SigD corresponding to the twisting amount of the transparent shell 3. The end surface of the second electrode 13 in the Z-direction is fixed to the outer side surface OS3 of the transparent shell 3. Therefore, the second electrode 13 is located between the first electrode 12 and the outer side surface OS3 of the transparent shell 3. The first electrode 12 serves as a shield against noise intruding from the outside of the grip load detection device 200. Therefore, according to the grip load detection device 200, noise is unlikely to intrude from the outside of the grip load detection device 200 to the sensor unit 1. As a result, according to the grip load detection device 200, the twisting amount of the transparent shell 3 can be detected with higher accuracy.

[0113] [First Modification]

[0114] Below, while referring to Figure 1 A sensor 100a according to a first modified example of the present invention will be described. Fig.18 It is a plan view of the sensor 100a according to the first modification example when viewed along the Z-direction. Fig.19 It is a plan view when the sensor unit 1 according to the first modification is viewed along the Z-direction. Fig. 20 It is a perspective view of a grip load detection device 200a according to a first modified example. Fig.21 1 is a diagram showing a transparent area ATP and a non-transparent area ANTP of a sensor 100a according to a first modification. In addition, regarding the sensor 100a according to the first modification, only the parts different from the sensor 100 according to the first embodiment will be described, and the rest will be omitted.

[0115] like Fig.18 As shown, the difference between the sensor 100a and the sensor 100 is that the first part P1 has a fourth part P4 and a fifth part P5. The fourth part P4 corresponds to the "third part" of the present invention. The fifth part P5 corresponds to the "fourth part" of the present invention.

[0116] like Fig.19 As shown, the fourth portion P4 has a rectangular shape when viewed in the Z-axis direction. In addition, the fourth portion P4 has a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0117] like Fig.19 As shown, the fifth portion P5 has a rectangular shape when viewed in the Z-axis direction. In addition, the fifth portion P5 has a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0118] like Fig.19As shown in FIG. 1 , the fifth portion P5 is located between the second portion P2 and the fourth portion P4. In addition, the length LP5 of the fifth portion P5 in the Y-axis direction is shorter than the length LP4 of the fourth portion P4 in the Y-axis direction. In the present embodiment, the length LP5 of the fifth portion P5 in the Y-axis direction is equal to the length of the second portion P2 in the Y-axis direction. In addition, the position of the fifth portion P5 in the Y-axis direction is the same as the position of the second portion P2 in the Y-axis direction.

[0119] In addition, if Fig. 20 As shown, the sensor 100a, the transmissive housing 3, the first handle 4L, the second handle 4R, the light emitter 5 and the calculation circuit (not shown) can be modularized to form a grip load detection device 200a.

[0120] The sensor 100a described above also has the same effect as the sensor 100. In addition, according to the sensor 100a, the transparent area ATP can be increased by using a small amount of the piezoelectric film 11. Fig.21 As shown, the first part P1 includes the fourth part P4 and the fifth part P5. The fifth part P5 is located between the second part P2 and the fourth part P4. As a result, the distance between the second part P2 and the fourth part P4 can be extended, and the transparent area ATP can be increased. On the other hand, the length of the fifth part P5 in the Y-axis direction is shorter than the length of the fourth part P4. Therefore, the piezoelectric film 11 located in the fifth part P5 can be smaller. As a result, according to the sensor 100a, the transparent area ATP can be increased by using a smaller amount of the piezoelectric film 11.

[0121] [Second Modification]

[0122] (Structure of sensor 100b)

[0123] Below, while referring to Figure 1 A sensor 100b according to a second modified example of the present invention will be described. Fig. 22 1 is a plan view of the sensor 100b of the second modification example when viewed from the Z-direction. In addition, regarding the sensor 100b of the second modification example, only the parts that are different from the sensor 100 of the first embodiment will be described, and the rest will be omitted.

[0124] like Fig. 22 As shown, the difference between the sensor 100b and the sensor 100 is that the length of the second portion P2 in the Y-axis direction is equal to the length of the first portion P1 in the Y-axis direction.

[0125] like Fig. 22As shown, the sensor 100b has a rectangular shape when viewed along the Z-axis direction. In addition, the sensor 100b has a long side extending along the X-axis direction and a short side extending along the Y-axis direction when viewed along the Z-axis direction.

[0126] (Structure of the holding load detection device 200b)

[0127] Below, while referring to the attached Figure 1 The structure of a grip load detection device 200 b according to a second modified example of the present invention will be described. Fig.23 It is a perspective view of a grip load detection device 200b according to a second modification. Fig.24 It is a plan view of a grip load detection device 200b of the second modification example when viewed along the Z-direction. In addition, regarding the grip load detection device 200b of the second modification example, only the parts that are different from the grip load detection device 200 of the first embodiment will be described, and the rest will be omitted.

[0128] The grip load detection device 200 b is different from the grip load detection device 200 in that a sensor 100 b is provided instead of the sensor 100 .

[0129] like Fig.23 As shown in FIG. 1 , the first portion P1 and the second portion P2 are respectively provided on the outer side surface OS3 of the transmissive shell 3. Fig.24 As shown, the first portion P1 is arranged in a first region A1 that does not overlap with the first handle 4L and the second handle 4R when viewed in the Z-axis direction.

[0130] like Fig.24 As shown, the second portion P2 is arranged in the second area A2 overlapping the first handle 4L and the second handle 4R when viewed in the Z-axis direction. In addition, the second portion P2 is not arranged in the first area A1.

[0131] The grip load detection device 200 b as described above also has the same effects as those of the grip load detection device 200 .

[0132] [Other embodiments]

[0133] The sensor of the present invention is not limited to the sensors 100, 100a, 100b, and can be changed within the scope of the gist. In addition, the structures of the sensors 100, 100a, 100b can be arbitrarily combined. In addition, the gripping load detection device of the present invention is not limited to the gripping load detection device 200, 200a, 200b, and can be changed within the scope of the gist. In addition, the structures of the gripping load detection device 200, 200a, 200b can be arbitrarily combined.

[0134] In addition, the first adhesive material 14 is not an essential component.

[0135] In addition, the second adhesive material 15 is not an essential component.

[0136] In addition, the first main surface US1 and the second main surface DS1 may not be parallel to each other.

[0137] In addition, the third main surface US11 and the fourth main surface DS11 may not be parallel to each other.

[0138] Furthermore, each of the third principal surface US11 and the fourth principal surface DS11 may not have a rectangular shape when viewed in the Z-axis direction. Additionally, each of the third principal surface US11 and the fourth principal surface DS11 may not have long sides extending in the X-axis direction and short sides extending in the Y-axis direction.

[0139] Furthermore, the piezoelectric film 11 is not limited to the PLLA film.

[0140] Furthermore, the first electrode 12 may be a signal electrode that outputs a deformation detection signal SigD corresponding to the deformation of the piezoelectric film 11. Furthermore, the second electrode 13 may be a ground electrode electrically connected to a ground potential.

[0141] In addition, the first electrode 12 may not include the first substrate 121 .

[0142] In addition, the second electrode 13 may not include the second substrate 131 .

[0143] In addition, the outer edge of the first portion P1 may not coincide with the outer edge of the piezoelectric film 11 when viewed in the Z-axis direction.

[0144] Furthermore, the first portion P1 may not have a rectangular shape when viewed in the Z-axis direction. Furthermore, the first portion P1 may not have a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0145] Furthermore, the second portion P2 may not have a rectangular shape when viewed in the Z-axis direction. Furthermore, the second portion P2 may not have a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0146] Furthermore, the first end of the first portion P1 may not be located closer to the Y+ direction than the third end of the second portion P2 when viewed in the Z-axis direction.

[0147] Furthermore, the second end of the first portion P1 may not be located closer to the Y-direction than the fourth end of the second portion P2 when viewed in the Z-axis direction.

[0148] In addition, the fifth main surface US21 and the sixth main surface DS21 may not be parallel to each other.

[0149] Furthermore, each of the fifth principal surface US21 and the sixth principal surface DS21 may not have a rectangular shape when viewed in the Z-axis direction. Additionally, each of the fifth principal surface US21 and the sixth principal surface DS21 may not have a long side extending in the X-axis direction and a short side extending in the Y-axis direction.

[0150] In addition, the calculation circuit is not an essential component.

[0151] In addition, the bonding member is not an essential component.

[0152] In addition, the shapes of the first plane OS31, the second plane OS32, the third plane OS33 and the fourth plane OS34 are not limited to rectangular shapes when viewed along the normal direction of the first plane OS31, the second plane OS32, the third plane OS33 and the fourth plane OS34.

[0153] In addition, the shape of each of the four planes included in the outer surface OS3 of the transparent casing 3 is not limited to a rectangular shape when viewed along the normal direction of each of the four planes.

[0154] In addition, the shape of the transmissive casing 3 is not limited to the square tube shape, and the transmissive casing 3 may have a polygonal tube shape or a cylindrical shape.

[0155] In addition, the first handle 4L may not be attached to the end portion of the transmissive casing 3 in the X-direction. In addition, the second handle 4R may not be attached to the end portion of the transmissive casing 3 in the X+direction.

[0156] In addition, the length of the second portion P2 in the Y-axis direction may not be equal to the length of the first plane OS31 in the Y-axis direction.

[0157] Furthermore, the sensor 100 may not be provided so that the long sides of the third principal surface US11 of the piezoelectric film 11 extend in the X-axis direction and the short sides of the third principal surface US11 of the piezoelectric film 11 extend across a plurality of planes of the inner surface IS3 .

[0158] Furthermore, the light emitting body 5 is not limited to the light emitting diode (LED).

[0159] Furthermore, the fourth portion P4 may not have a rectangular shape when viewed in the Z-axis direction. Furthermore, the fourth portion P4 may not have a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0160] Furthermore, the fifth portion P5 may not have a rectangular shape when viewed in the Z-axis direction. Furthermore, the fifth portion P5 may not have a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0161] Furthermore, the length LP5 of the fifth portion P5 in the Y-axis direction may not be equal to the length LP5 of the second portion P2 in the Y-axis direction. Furthermore, the position of the fifth portion P5 in the Y-axis direction may not be the same as the position of the second portion P2 in the Y-axis direction.

[0162] Furthermore, in the sensor 100 b , the length of the second portion P2 in the Y-axis direction may not be equal to the length of the first portion P1 in the Y-axis direction.

[0163] In the sensor 100b, the sensor 100 may not have a rectangular shape when viewed in the Z-axis direction. In the sensor 100b, the sensor 100 may not have a long side extending in the X-axis direction and a short side extending in the Y-axis direction when viewed in the Z-axis direction.

[0164] Furthermore, the uniaxial stretching direction (orientation direction) OD of the piezoelectric film 11 may form an angle of 90 degrees with respect to the X-axis direction. The 90 degrees includes, for example, an angle of about 90 degrees ±10 degrees.

[0165] The present invention has the following structure.

[0166] (1) A sensor comprising:

[0167] A piezoelectric film having a first main surface and a second main surface facing each other in a first direction;

[0168] a first electrode disposed on the first main surface;

[0169] a second electrode provided on the second main surface; and

[0170] Wiring Department,

[0171] The first electrode and the second electrode include first portions that overlap each other and overlap the piezoelectric film when viewed along the first direction.

[0172] The first electrode and the second electrode include second portions that overlap each other and do not overlap the piezoelectric film when viewed along the first direction.

[0173] The first portion and the second portion are arranged in a second direction orthogonal to the first direction,

[0174] The wiring portion includes:

[0175] a wiring substrate which is an insulator, overlaps with the second portion when viewed along the first direction, and has a third main surface and a fourth main surface which are opposite to each other in the first direction;

[0176] a first conductor provided on the third main surface and electrically connected to the first electrode; and

[0177] A second conductor is provided on the fourth main surface and is electrically connected to the second electrode.

[0178] (2) The sensor according to (1), wherein:

[0179] A length of the second portion in a third direction perpendicular to the first direction and the second direction is shorter than a length of the first portion in the third direction.

[0180] (3) The sensor according to (1) or (2), wherein:

[0181] The first part is transparent.

[0182] (4) The sensor according to any one of (1) to (3), wherein:

[0183] The first portion has a rectangular shape when viewed along the first direction.

[0184] (5) The sensor according to (4), wherein:

[0185] The first portion has a long side extending along the second direction and a short side extending along a third direction orthogonal to the first direction and the second direction when viewed along the first direction.

[0186] (6) The sensor according to any one of (1) to (5), wherein:

[0187] The second portion has a rectangular shape when viewed along the first direction.

[0188] (7) The sensor according to (6), wherein:

[0189] The second portion has a long side extending along the second direction and a short side extending along a third direction perpendicular to the first direction and the second direction when viewed along the first direction.

[0190] (8) The sensor according to any one of (1) to (7), wherein:

[0191] The first portion includes a first end in one direction of a third direction orthogonal to the first direction and the second direction, and includes a second end in a direction opposite to the first direction.

[0192] The second portion includes a third end in the one direction and a fourth end in the opposite direction,

[0193] The first end is located closer to the one direction than the third end when viewed along the first direction,

[0194] The second end is located closer to the opposite direction than the fourth end when viewed in the first direction.

[0195] (9) The sensor according to any one of (1) to (8), wherein:

[0196] The part 1 has a part 3 and a part 4,

[0197] The fourth portion is located between the second portion and the third portion,

[0198] A length of the fourth portion in a third direction perpendicular to the first direction and the second direction is shorter than a length of the third portion in the third direction.

[0199] (10) The sensor according to any one of (1) to (9), wherein:

[0200] The wiring substrate is a flexible substrate.

[0201] (11) The sensor according to any one of (1) to (10), wherein:

[0202] The wiring portion includes:

[0203] a first conductive adhesive member overlapping the second portion when viewed along the first direction and provided on an end surface of the first conductor in one direction in the first direction; and

[0204] a second conductive adhesive member which overlaps with the second portion when viewed in the first direction and is provided on an end surface of the second conductor in a direction opposite to the one direction,

[0205] The first electrode, the first conductive adhesive, the first conductor, the wiring substrate, the second conductor, the second conductive adhesive, and the fifth portion of the second electrode overlapping the second portion when viewed along the first direction are arranged in sequence along the first direction.

[0206] The first conductor is electrically connected to the first electrode via the first conductive adhesive.

[0207] The second conductor is electrically connected to the second electrode via the second conductive adhesive.

[0208] (12) The sensor according to (11), wherein:

[0209] The position in the second direction where the fifth portion is located when viewed along the first direction is defined as a first position,

[0210] A length of the wiring substrate at the first position in a third direction orthogonal to the first direction and the second direction is longer than a length of the second portion at the first position in the third direction.

[0211] (13) The sensor according to (11) or (12), wherein:

[0212] The position in the second direction where the fifth portion is located when viewed along the first direction is defined as a first position,

[0213] The length of the first conductive adhesive at the first position in a third direction orthogonal to the first direction and the second direction is shorter than the length of the second portion at the first position in the third direction.

[0214] A length of the second conductive adhesive at the first position in the third direction is shorter than a length of the second portion at the first position in the third direction.

[0215] (14) A grip load detection device comprising:

[0216] The sensor according to any one of (1) to (13);

[0217] a transmissive housing having transmissivity and a cylindrical shape; and

[0218] a handle for a user to hold and covering a portion of the outer side of the transmissive shell,

[0219] The sensor is arranged on the outer side surface.

[0220] The first portion is arranged in a first area that does not overlap with the handle when viewed along the normal direction of the outer surface.

[0221] The wiring portion is arranged in a second region overlapping the handle when viewed in the normal direction, and is not arranged in the first region.

[0222] (15) The grip load detection device according to (14), wherein:

[0223] The grip load detection device further includes a light emitting body provided in a hollow portion surrounded by the inner side surface of the transmissive housing.

[0224] The sensor outputs a deformation detection signal corresponding to the twist amount of the transparent shell.

[0225] The light emitting body is arranged in the first area,

[0226] The light emitter emits light based on the deformation detection signal.

[0227] (16) The grip load detection device according to (14) or (15), wherein:

[0228] The outer side surface comprises a polygonal plane,

[0229] The second portion is arranged on a plane of the outer side surface.

[0230] (17) The grip load detection device according to any one of (14) to (16), wherein:

[0231] The first electrode is a ground electrode electrically connected to a ground potential,

[0232] The second electrode is a signal electrode that outputs a deformation detection signal corresponding to the twist amount of the transparent housing.

[0233] An end surface of the second electrode in the first direction is fixed to the outer surface.

[0234] Description of Reference Numerals

[0235] 1. sensor portion; 2. wiring portion; 3. transmissive housing; 4L. first handle; 4R. second handle; 5. luminous body; 10. object; 11. piezoelectric film; 12. first electrode; 13. second electrode; 14. first adhesive member; 15. second adhesive member; 21. wiring substrate; 22. first conductor; 23. second conductor; 24. first conductive adhesive member; 25. second conductive adhesive member; 100, 100a, 100b, sensor; 121, first substrate; 122, first conductive film; 131, second substrate; 132, second conductive film; 200, 200a, 200b, gripping load detection device; A1, first area; A 2. The second area; DS11, the fourth main surface; DS21, the sixth main surface; IS3, the inner side surface; OS3, the outer side surface; OS31, the first plane; OS32, the second plane; OS33, the third plane; OS34, the fourth plane; P1, the first part; P2, the second part; P3, the third part; P4, the fourth part; P5, the fifth part; PO1, the first position; SigD, the deformation detection signal; US11, the third main surface; US21, the fifth main surface; SI1, the first edge; SI2, the second edge; SI3, the third edge; SI4, the fourth edge; SI5, the fifth edge; SI6, the sixth edge; SI7, the seventh edge; SI8, the eighth edge.

Claims

1. A sensor comprising: A piezoelectric film having a first main surface and a second main surface facing each other in a first direction; a first electrode disposed on the first main surface; a second electrode provided on the second main surface; and Wiring Department, The first electrode and the second electrode include first portions that overlap each other and overlap the piezoelectric film when viewed along the first direction. The first electrode and the second electrode include second portions that overlap each other and do not overlap the piezoelectric film when viewed along the first direction. The first portion and the second portion are arranged in a second direction orthogonal to the first direction, The wiring portion includes: a wiring substrate which is an insulator, overlaps with the second portion when viewed along the first direction, and has a third main surface and a fourth main surface which are opposite to each other in the first direction; a first conductor provided on the third main surface and electrically connected to the first electrode; and A second conductor is provided on the fourth main surface and is electrically connected to the second electrode.

2. The sensor according to claim 1, wherein: A length of the second portion in a third direction perpendicular to the first direction and the second direction is shorter than a length of the first portion in the third direction.

3. The sensor according to claim 1 or 2, wherein: The first part is transparent.

4. The sensor according to any one of claims 1 to 3, wherein: The first portion has a rectangular shape when viewed along the first direction.

5. The sensor according to claim 4, wherein: The first portion has a long side extending along the second direction and a short side extending along a third direction orthogonal to the first direction and the second direction when viewed along the first direction.

6. The sensor according to any one of claims 1 to 5, wherein: The second portion has a rectangular shape when viewed along the first direction.

7. The sensor according to claim 6, wherein: The second portion has a long side extending along the second direction and a short side extending along a third direction perpendicular to the first direction and the second direction when viewed along the first direction.

8. The sensor according to any one of claims 1 to 7, wherein: The first portion includes a first end in one direction of a third direction orthogonal to the first direction and the second direction, and includes a second end in a direction opposite to the first direction. The second portion includes a third end in the one direction and a fourth end in the opposite direction, The first end is located closer to the one direction than the third end when viewed along the first direction, The second end is located closer to the opposite direction than the fourth end when viewed in the first direction.

9. The sensor according to any one of claims 1 to 8, wherein: The part 1 has a part 3 and a part 4, The fourth portion is located between the second portion and the third portion, A length of the fourth portion in a third direction perpendicular to the first direction and the second direction is shorter than a length of the third portion in the third direction.

10. The sensor according to any one of claims 1 to 9, wherein: The wiring substrate is a flexible substrate.

11. The sensor according to any one of claims 1 to 10, wherein: The wiring portion includes: a first conductive adhesive member overlapping the second portion when viewed along the first direction and provided on an end surface of the first conductor in one direction in the first direction; and a second conductive adhesive member which overlaps with the second portion when viewed in the first direction and is provided on an end surface of the second conductor in a direction opposite to the one direction, The first electrode, the first conductive adhesive, the first conductor, the wiring substrate, the second conductor, the second conductive adhesive, and the fifth portion of the second electrode overlapping the second portion when viewed along the first direction are arranged in sequence along the first direction. The first conductor is electrically connected to the first electrode via the first conductive adhesive. The second conductor is electrically connected to the second electrode via the second conductive adhesive.

12. The sensor according to claim 11, wherein: The position in the second direction where the fifth portion is located when viewed along the first direction is defined as a first position, A length of the wiring substrate at the first position in a third direction orthogonal to the first direction and the second direction is longer than a length of the second portion at the first position in the third direction.

13. The sensor according to claim 11 or 12, wherein: The position in the second direction where the fifth portion is located when viewed along the first direction is defined as a first position, The length of the first conductive adhesive at the first position in a third direction orthogonal to the first direction and the second direction is shorter than the length of the second portion at the first position in the third direction. A length of the second conductive adhesive at the first position in the third direction is shorter than a length of the second portion at the first position in the third direction.

14. A grip load detection device comprising: The sensor according to any one of claims 1 to 13; a transmissive housing having transmissivity and a cylindrical shape; and a handle for a user to hold and covering a portion of the outer side of the transmissive shell, The sensor is arranged on the outer side surface. The first portion is arranged in a first area that does not overlap with the handle when viewed along the normal direction of the outer surface. The wiring portion is arranged in a second region overlapping the handle when viewed in the normal direction, and is not arranged in the first region.

15. The grip load detection device according to claim 14, wherein: The grip load detection device further includes a light emitting body provided in a hollow portion surrounded by the inner side surface of the transmissive housing. The sensor outputs a deformation detection signal corresponding to the twist amount of the transparent shell. The light emitting body is arranged in the first area, The light emitter emits light based on the deformation detection signal.

16. The grip load detection device according to claim 14 or 15, wherein: The outer side surface comprises a polygonal plane, The second portion is arranged on a plane of the outer side surface.

17. The grip load detection device according to any one of claims 14 to 16, wherein: The first electrode is a ground electrode electrically connected to a ground potential, The second electrode is a signal electrode that outputs a deformation detection signal corresponding to the twist amount of the transparent housing. An end surface of the second electrode in the first direction is fixed to the outer surface.

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