JP2019068530A - Power generation switch and input device - Google Patents

Abstract

To provide a power generation switch with the power generation performance being improved.SOLUTION: A power generation switch 100 comprises: a holder part 80; an arm part 40 which is rotated with respect to the holder part 80 at least partially in a Z-axis plus direction and a Z-axis minus direction; a power generation part 70 including a fixed end portion 71 that is fixed to the holder part 80 and a free end portion 72 that is freely vibrated in the Z-axis plus direction and the Z-axis minus direction, and taking a state in which the free end portion 72 is adsorbed by a magnetic force and a state in which the free end portion is released from the adsorbed state; a magnet 61 which is disposed closer to a Z-axis minus side than the free end portion 72 and attracts the free end portion 72 by a magnetic force; and a magnet 60 which is disposed closer to a Z-axis plus side than the free end portion 72 and attracts the free end portion 72 by a magnetic force. The arm part 40 includes: a projection 44a which moves the magnet 61 in the Z-axis minus direction when moving in the Z-axis minus direction; and a projection 44b which moves the magnet 60 in the Z-axis plus direction when moving in the Z-axis plus direction.SELECTED DRAWING: Figure 4B

Description

  The present disclosure relates to a power generation switch and an input device including the power generation switch.

  As a power generation mechanism using a piezoelectric element, Patent Document 1 discloses a piezoelectric power generation mechanism (power generation device) having a cantilever structure including a piezoelectric element, a support plate to which the piezoelectric element is fixed, and a spring drive unit. It is disclosed. The spring drive is displaced by the application of an external driving force to the free end of the support plate and vibrates by a restoring force when the external driving force is released. Since the vibration of the spring drive portion is transmitted to the piezoelectric element, the vibration of the piezoelectric element continues for a long time, and power can be generated efficiently.

JP, 2006-158112, A

  As a power generation switch provided with a power generation device, it is desirable that power generation performance be improved.

  Thus, the present disclosure aims to provide a power generation switch and an input device with improved power generation performance.

  In order to achieve the above object, a power generation switch according to an aspect of the present disclosure includes a holder portion, a first direction, and a second direction opposite to the first direction, at least a part of which corresponds to the holder portion. It has a moving part moving to the opposite side, a fixed part fixed to the holder part, and a free end that vibrates freely in the first direction and the second direction, and the free end is attracted by magnetic force A power generation unit that takes a state of being released and a state of being released from being attracted, and a first one that is disposed closer to the first direction than the free end and that attracts the free end by the magnetic force An adsorber, and a second adsorber disposed closer to the second direction than the free end and attracting the free end by the magnetic force, and the moving unit has the first direction Contact with the first adsorber when moving to the first adsorber The first convex portion to be moved in the first direction, and the second adsorptive member being moved in the second direction by contacting the second adsorptive member when moving in the second direction And a second convex portion.

  In addition, in order to achieve the above object, an input device according to an aspect of the present disclosure includes: the power generation switch described above; a control unit that generates a signal according to the free vibration of the power generation unit; And a transmission unit that transmits, and the power generation unit supplies the power generated by the free vibration to the control unit and the transmission unit.

  According to the present disclosure, a power generation switch and an input device with improved power generation performance can be provided.

FIG. 1 is a perspective view showing the appearance of the input device according to the embodiment. FIG. 2A is an exploded perspective view showing the configuration of the input device according to the embodiment. FIG. 2B is an exploded perspective view showing the configuration of the power generation device according to the embodiment. FIG. 2C is a partial cross-sectional view of the power generation unit according to the embodiment, taken along line IIC-IIC in FIG. 2B. FIG. 3 is a block diagram showing a functional configuration of the input device according to the embodiment. FIG. 4A is a plan view of the power generation device according to the embodiment. FIG. 4B is a schematic plan view of the dashed line area of FIG. 4A. FIG. 5A is a partial cross-sectional view of the power generation device according to the embodiment, taken along line Va-Va in FIG. 4A. FIG. 5B is a partial cross-sectional view of the power generation device according to the embodiment, taken along line Vb-Vb in FIG. 4A. 6 is a cross-sectional view of the input device according to the embodiment, taken along line VI-VI of FIG. FIG. 7 is a schematic view showing the operation of the power generation switch according to the embodiment.

(Summary of this disclosure)
In order to achieve the above object, a power generation switch according to an aspect of the present disclosure includes a holder portion, a first direction, and a second direction opposite to the first direction, at least a part of which corresponds to the holder portion. It has a moving part moving to the opposite side, a fixed part fixed to the holder part, and a free end that vibrates freely in the first direction and the second direction, and the free end is attracted by magnetic force A power generation unit that takes a state of being released and a state of being released from being attracted, and a first one that is disposed closer to the first direction than the free end and that attracts the free end by the magnetic force An adsorber, and a second adsorber disposed closer to the second direction than the free end and attracting the free end by the magnetic force, and the moving unit has the first direction Contact with the first adsorber when moving to the first adsorber The first convex portion to be moved in the first direction, and the second adsorptive member being moved in the second direction by contacting the second adsorptive member when moving in the second direction And a second convex portion.

  As a result, when moving in the first direction and the second direction, the moving unit can freely vibrate the power generation unit to generate power. That is, since the power generation switch can generate power twice by one operation of the moving unit, the power generation amount of the power generation switch is increased. Therefore, the power generation performance of the power generation switch can be improved.

  Further, the power generation unit is magnetically attracted to the first adsorbent, warps in the first direction, and attracted to the second adsorbent, warps in the second direction, and has a magnetic substrate. And a power generating element disposed on the substrate and generating electric power by vibration of the substrate, wherein the substrate returns to the second direction after the first adsorbent moves in the first direction. After the second adsorber moves in the second direction, the free movement may be performed, and then, the free movement may be performed by returning to the first direction and vibrating.

  Thus, the power generation unit can be realized with a simple configuration. For example, when the substrate does not have magnetism, the power generation unit needs to have a magnetic plate or the like adsorbed by the first and second adsorbers and the magnetic force, which complicates the configuration.

  In addition, the substrate has a first surface facing the first adsorber, and a second surface facing the second adsorber, and the power generation switch is further configured to carry out the process more than the substrate. A first orientation side, wherein the first adsorbent limits the movement of the substrate in the first direction by coming into contact with the first surface when moving in the first direction. The first stopper is disposed closer to the second direction than the substrate, and the second adsorbent contacts the second surface when moving in the second direction. And a second stopper that regulates movement in the two directions.

  As a result, since the amount of warpage of the power generation unit immediately before the start of free vibration can be made substantially constant, it is possible to suppress variations in the amount of power generation. Can. In addition, since the amount of warpage is increased and fatigue failure of the power generation portion can be suppressed, durability of the power generation portion can be improved. Thus, the power generation performance of the power generation switch is further improved.

  The distance between the substrate and the first stopper may be equal to the distance between the substrate and the second stopper.

  Thus, the power generation switch can generate substantially equal amounts of power generation in two power generations.

  The distance between the substrate and the first stopper may be different from the distance between the substrate and the second stopper. The distance between the substrate and the first stopper may be larger than the distance between the substrate and the second stopper.

  Thus, the power generation switch can generate different amounts of power generation in two power generations. For example, it is possible to increase the amount of power generated by free vibration generated by the movement of the first adsorbent in the first direction.

  Further, the first convex portion is disposed at a position not overlapping the first adsorber and not overlapping the second adsorber when viewed from the first direction, and the second convex The part may be disposed at a position overlapping with the second adsorbent and not overlapping the first adsorbent when viewed from the first direction.

  Thus, only the first adsorber can be moved when the moving unit moves in the first direction, and only the second adsorber can be moved when the moving unit moves in the second direction. Can.

  Further, the first adsorbent is adsorbed with the free end when the second convex portion is moving the second adsorbent in the second direction, and the second adsorbent is Alternatively, the first protrusion may be attracted to the free end when the first adsorber is moved in the first direction.

  Thereby, the 1st and 2nd adsorption object can be used as a weight of an electric power generation part.

  In addition, in order to achieve the above object, an input device according to an aspect of the present disclosure includes: the power generation switch described above; a control unit that generates a signal according to the free vibration of the power generation unit; And a transmission unit that transmits, and the power generation unit supplies the power generated by the free vibration to the control unit and the transmission unit.

  Thus, the power generation switch described above can be used as an input device for transmitting a signal according to free vibration.

  Further, the control unit generates a first signal as the signal according to a first free vibration which is the free vibration generated by the movement of the first adsorber in the first direction, and A second signal may be generated as the signal according to a second free vibration which is the free vibration generated by the movement of two adsorbers in the second direction.

  Thus, the input device can generate and transmit a signal at each of two times of power generation by the power generation unit, so that an input device with improved convenience can be realized.

  The control unit generates the first signal according to at least one of the amplitude or frequency of the first free vibration, and the control unit generates the first signal according to at least one of the amplitude or frequency of the second free vibration. Two signals may be generated.

  Thereby, the control unit can generate different signals when the amplitudes or frequencies of the first and second free vibrations are different. Since the input device can transmit two different signals by one operation, convenience is further improved.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, the detailed description may be omitted if necessary. For example, detailed description of already well-known matters and redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Further, each drawing is a schematic view, and is not necessarily illustrated exactly.

  Further, in the drawings used for the description in the following embodiments, coordinate axes may be shown. The minus side of the Z axis represents the installation surface side, and the plus side of the Z axis represents the operation surface side. Further, the X axis direction and the Y axis direction are directions orthogonal to each other on a plane perpendicular to the Z axis direction. For example, in the following embodiment, “plan view” means viewing from the Z-axis direction.

  In addition, the description “approximately **” is intended to include those that are substantially recognized as **. For example, when describing “approximately circular shape” as an example, not only perfect circular but also substantially circular The intention is to include what is recognized as

Embodiment
Hereinafter, the input device 10 according to the present embodiment will be described with reference to FIGS. 1 to 7.

[1. Overall configuration of input device]
First, the configuration of the input device 10 according to the present embodiment will be described with reference to FIGS. 1 to 3.

  FIG. 1 is a perspective view showing the appearance of an input device 10 according to the present embodiment.

  The input device 10 according to the present embodiment is a device that generates power when the button unit 11 is operated, and wirelessly transmits a predetermined signal using the power generated by the power generation. That is, the input device 10 according to the present embodiment does not include a battery or the like, and transmits a predetermined signal by generating power each time the input device 10 is operated. The operation of the button unit 11 means, for example, that the button unit 11 is pressed by the user. Further, the predetermined signal will be described later.

  In addition, the input device 10 according to the present embodiment may be a device that can be carried by a user. For example, the user can place the input device 10 on a desk when working at a desk and the input device 10 next to a futon when going to sleep.

  FIG. 2A is an exploded perspective view showing the configuration of the input device 10 according to the present embodiment.

  As shown in FIGS. 1 and 2A, the input device 10 according to the present embodiment includes a button 11, a cover 12, a case 13, a signal transmitter 90, and a power generator 20. As shown in FIG. 2A, the power generation switch 100 includes a button portion 11, a cover portion 12, a case portion 13 and a power generation device 20.

  Below, each component which comprises the input device 10 is demonstrated suitably, referring drawings. The present invention is characterized by the power generation device 20 provided in the power generation switch 100.

[1-1. Button, Cover, and Case]
The button 11, the cover 12, and the case 13 will be described with reference to FIGS. 1 and 2A.

  The button unit 11 receives an operation by the user. Specifically, the button unit 11 receives an operation of pressing in the Z-axis negative direction from the user. At least a part of the button portion 11 is disposed so as to protrude from the cover portion 12 and moves in the Z-axis direction by being pressed.

  The outer diameter of the button portion 11 is substantially circular in plan view. The button portion 11 is formed, for example, in a substantially cylindrical shape. FIG. 1 shows an example in which the tip end portion (the end portion on the Z-axis plus side) of the button portion 11 is formed in a substantially semi-cylindrical shape extending in the Z-axis direction. Although not shown, the end of the button portion 11 on the Z-axis negative side has an opening into which one end of the pressing portion 30 described later is inserted. Thus, when the button unit 11 is operated, the pressing unit 30 is pressed down. In addition, the shape of the button part 11 is not limited to this.

  The cover portion 12 and the case portion 13 are casings forming an outer shell of the input device 10. The case portion 13 is a bottomed box having an opening, and the cover 12 is a lid covering the opening. Further, a convex portion 12 b having an opening 12 a which is a through hole into which the button portion 11 is inserted is formed in the cover portion 12. For example, the convex portion 12 b is disposed at a substantially central portion of the cover portion 12 in a plan view. Further, in a space formed by the cover 12 and the case 13, a signal transmission unit 90, a power generation device 20, and the like, which will be described later, are accommodated.

  The cover 12 and the case 13 are formed in a substantially rectangular shape whose four corners are rounded in plan view. The shapes of the cover 12 and the case 13 are not particularly limited, and may be substantially circular, substantially triangular, substantially trapezoidal, substantially polygonal, substantially semicircular, or the like. That is, the shape of the input device 10 is not particularly limited.

  For example, the case 13 is formed with a convex 13a projecting outward when the case 13 is viewed in plan, and the button 11 has a shape corresponding to the convex 13a. The claw portion 12c is formed. The cover 12 is fixed to the case 13 by fitting the claws 12 c to the protrusions 13 a. In addition, the fixing method of the cover part 12 and the case part 13 is not limited to this.

  The button portion 11, the cover portion 12 and the case portion 13 are formed of a resin material. For example, the button 11, the cover 12, and the case 13 may be made of a copolymer of acrylic resin, polycarbonate resin, PBT resin (Polybutylene Telephtalate), POM (Polymethylene), ABS resin (Acrylonitrile, Butadiene, and Styrene). And so on. In addition, the material of the button part 11, the cover part 12, and the case part 13 is not limited to this. Further, the button portion 11, the cover portion 12 and the case portion 13 may be formed of the same material, or may be formed of different materials. Further, the button portion 11, the cover portion 12 and the case portion 13 may be formed of a colored resin material. Thereby, the user can not visually recognize each component accommodated in the space formed by the cover portion 12 and the case portion 13, so that the appearance of the input device 10 can be improved.

  Hereinafter, the signal transmission part 90 and the electric power generating apparatus 20 accommodated in the space formed of the cover part 12 and the case part 13 are demonstrated.

[1-2. Signal transmitter]
When the power is supplied from a power generation unit described later, the signal transmission unit 90 transmits a predetermined signal using the power. The signal transmission unit 90 is configured by mounting various electronic components on the mounting substrate 90 a. For example, on the mounting substrate 90a, an electric circuit including a transmission IC (Integrated Circuit) for transmitting a signal, a circuit for rectification, a circuit for voltage adjustment, and the like is mounted. The mounting substrate 90 a is disposed between the power generation device 20 and the cover 12 in a state where the cover 12 is fixed to the case 13. The mounting substrate 90 a has a plate shape and has a notch through which the button portion 11 and the pressing portion 30 pass. The functional configuration of the signal transmission unit 90 will be described later.

[1-3. Power generator]
Next, the power generation device 20 will be described with reference to FIGS. 2A and 2B.

  FIG. 2B is an exploded perspective view showing the configuration of the power generation device 20 according to the present embodiment.

  As shown to FIG. 2A, the electric power generating apparatus 20 is an apparatus accommodated in the case part 13, and generate | occur | produces electric power whenever the button part 11 is operated.

  As shown in FIG. 2B, the power generation device 20 includes a pressing portion 30, an arm portion 40, an upper base portion 50, a magnet 60, a power generation portion 70, a magnet 61, a holder portion 80, a spring 81, and a lower base portion 51.

  When the button unit 11 is operated and pressed down, the pressing unit 30 presses the arm unit 40 accordingly. The pressing portion 30 is a standing portion 30b erected substantially orthogonal to the Z axis plus side from the main body 30a and one end of the main body 30a (the end on the Y axis minus side), and the other end of the main body 30a And (b) a curved portion 30c projecting from the (end portion on the Y axis positive side) to the Z axis negative side. The shape of the bending portion 30c is substantially U-shaped when viewed from the X-axis direction.

  The erected portion 30 b is inserted into the opening of the button portion 11. The curved portion 30 c is in contact with the convex portion 41 of the arm portion 40. When the button portion 11 is operated, the standing portion 30b is pushed down with it. Along with that, the curved portion 30 c connected to the standing portion 30 b via the main body portion 30 a pushes down the convex portion 41.

  The arm unit 40 rotates in the direction toward the Z-axis minus side and the Z-axis plus side with the operation of the button unit 11. At this time, the arm unit 40 is configured to be able to push down the magnet 61 and to push up the magnet 60. In addition, pushing down means moving the button 11 in the direction to be pushed down (that is, the direction toward the Z axis minus side), and pushing up indicates the direction opposite to the direction in which the button 11 is pushed down (that is, the direction , Z axis plus direction) is meant to be moved. The present disclosure is characterized in that the arm unit 40 moves the two magnets 60 and 61 in different directions. The direction toward the Z-axis minus side is an example of a first direction, and the direction toward the Z-axis plus side is an example of a second direction opposite to the first direction. Furthermore, hereinafter, the direction toward the Z axis minus side is also referred to as the Z axis minus direction, and the direction toward the Z axis plus side is also referred to as the Z axis plus direction.

  The arm portion 40 is composed of a convex portion 41, arms 42 and 43, and connection portions 44 and 45.

  The convex part 41 is in contact with the pressing part 30, and is pushed down in the operated direction (specifically, the Z-axis minus direction) by operating the button part 11. The convex portion 41 is formed so as to protrude outward of the arm portion 40 from the connection portion 44 when the arm portion 40 is viewed in plan.

  The arms 42 and 43 extend in a direction connecting the fixed end 71 and the free end 72 of the power generation unit 70 (that is, the Y-axis direction), and are arranged substantially parallel to each other. At the end on the free end 72 side of the arms 42 and 43, an opening 46 that engages with a projection 80c of a holder 80 described later is formed. That is, the end on the fixed end 71 side of the arm 40 is pivotally supported by the projection 80 c.

  The connecting portion 44 moves the magnet 61 in the negative Z-axis direction when the button portion 11 is pressed and rotated in the negative Z-axis direction, and the magnet 81 is rotated in the positive Z-axis direction by the spring 81 Move 60 in the Z-axis plus direction. The connection portion 44 connects the end portions on the free end portion 72 side of the arms 42 and 43. Details of the connection unit 44 will be described later. The connecting portion 45 also connects the end portions of the arms 42 and 43 on the fixed end 71 side.

  The arm unit 40 is made of a resin material. For example, the arm unit 40 is formed of an acrylic resin, a polycarbonate resin, a PBT resin, an ABS resin, or the like. For example, each component which constitutes arm part 40 may be formed in one.

  The arm portion 40 formed as described above rotates with respect to the holder portion 80 with the convex portion 80c as a rotation axis when the button portion 11 is operated and the pressing portion 30 pushes down the convex portion 41. For example, when the X axis minus side is viewed from the X axis plus side, the arm unit 40 pivots in the Z axis minus direction. In addition, the arm part 40 rotated by pressing the button part 11 is an example of a moving part. The pivoting of the arm unit 40 is an example of the movement of at least a part of the arm unit 40.

  The upper base portion 50 and the lower base portion 51 are disposed so as to sandwich the power generation unit 70, and are members that fix the fixed end 71 of the power generation unit 70 to the holder unit 80.

  The upper base portion 50 includes a main body 50 a and a standing portion 50 b extending from the end on the Y axis plus side of the main body 50 a toward the power generation portion 70. The main body portion 50a is formed with an opening portion into which a convex portion 80d formed on the holder portion 80 and extending to the Z-axis plus side is inserted. Moreover, the notch part 50c which was notched is formed in the fixed end 71 side of the main-body part 50a. For example, the opening and the notch 50c are arranged side by side so that at least a portion thereof overlaps with the X axis. Further, the standing portion 50 b is disposed on the Z-axis positive side with respect to the power generation unit 70 in a state where each component is accommodated in the case portion 13.

  The lower base 51 includes a main body 51a, an upright portion 51b extending toward the power generation portion 70 from an end of the main body 51a on the Y-axis plus side, and a claw 51c. The main body portion 51 a is formed with an opening portion into which a convex portion (not shown) extending to the Z axis negative side formed in the holder portion 80 is inserted. Further, the standing portion 51 b is disposed on the Z axis minus side with respect to the power generation unit 70 in a state where each component is accommodated in the case portion 13.

  The protrusion 80 d of the holder 80 is inserted into the opening of the power generation unit 70 and the opening of the upper base 50, and the protrusion extending to the Z axis minus side of the holder 80 is at the opening of the lower base 51. The upper base portion 50 and the lower base portion 51 fix the fixed end portion 71 of the power generation portion 70 to the holder portion 80 by the claw portion 51c sandwiching the notch portion 50c in the inserted state. In addition, the fixing method to the holder part 80 of the fixed end 71 is not limited to this. For example, the fixed end 71 and the holder 80 may be screwed together by a screw, or may be another method.

  Although the material which comprises the upper side base part 50 and the lower side base part 51 is not specifically limited, The upper side base part 50 and the lower side base part 51 are formed, for example from a metal material or a resin material. For example, the upper base portion 50 and the lower base portion 51 may be formed of a nonmagnetic metal material. The details of the standing portions 50b and 51b will be described later. The standing portion 51b is an example of a first stopper, and the standing portion 50b is an example of a second stopper.

  The magnets 60 and 61 move in the Z-axis direction together with the arm unit 40, and by causing the free end 72 to be attracted and released from the attracted state, free vibration of the power generation unit 70 is achieved. Is a member for causing The magnet 60 is disposed on the Z-axis plus side with respect to the free end 72 and attracts the free end 72 by magnetic force. The magnet 61 is disposed on the Z axis minus side relative to the free end 72 and attracts the free end 72 by magnetic force. For example, the magnets 60 and 61 have a substantially rectangular shape in plan view. The magnets 60 and 61 are formed to extend in the width direction (X-axis direction) of the free end 72. For example, magnets 60 and 61 are longer than the width of free end 72. The magnet 60 is an example of a second adsorber, and the magnet 61 is an example of a first adsorber.

  The power generation unit 70 has a piezoelectric element, and generates a voltage by the piezoelectric effect by bending and vibrating. Then, the power generated by the power generation unit 70 is supplied to the control unit 94 and the transmission unit 95. The power generation unit 70 is formed in a flat plate shape. The shape of the power generation unit 70 in plan view is a shape in which the width of the free end 72 is smaller than the width of the fixed end 71, but the shape of the power generation unit 70 is not limited thereto.

  The fixed end 71 of the power generation unit 70 is sandwiched and fixed between the upper main body 80a and the lower main body 80b. The power generation unit 70 has a cantilever structure in which the fixed end 71 is fixed and the free end 72 freely vibrates. The power generation unit 70 generates power when the free end 72 freely vibrates. The fixed end 71 is an example of a fixed portion fixed to the holder 80.

  An opening for fixing the fixed end 71 to the holder 80 is formed on the fixed end 71 side.

  Here, the structure of the power generation unit 70 will be described with reference to FIG. 2C.

  FIG. 2C is a partial cross-sectional view of power generation unit 70 according to the present embodiment, taken along line IIc-IIc in FIG. 2B.

  As shown in FIG. 2C, the power generation unit 70 includes a thin plate-shaped substrate 70a, a piezoelectric unit 70b disposed on the main surface 73 (surface on the Z axis plus side) side of the substrate 70a, and a main surface 74 of the substrate 70a ( And a piezoelectric portion 70c disposed on the Z axis negative side surface side). For example, the power generation unit 70 is stacked and disposed in the order of the piezoelectric unit 70 b, the substrate 70 a, and the piezoelectric unit 70 c.

  The substrate 70a is a plate-like member which has magnetism and is attracted by the magnets 60 and 61 and magnetic force. For example, the substrate 70a is formed of a magnetic metal material. Also, the substrate 70a is formed of a spring material. For example, the substrate 70a is formed of iron, cobalt, nickel or their alloys, or ferrite.

  The piezoelectric portion 70 b is stacked in contact with the electrode 70 d, the piezoelectric body 70 e, and the electrode 70 f in this order from the substrate 70 a toward the upper base portion 50. Also. The piezoelectric portion 70c is stacked in contact with the electrode 70d, the piezoelectric body 70e, and the electrode 70f in this order from the substrate 70a to the lower base portion 51 side. The electrodes 70d and 70f are electrodes for extracting a voltage generated by the piezoelectric body 70e. The electrodes 70d and 70f may be formed of a metal material or an oxide conductor material. The piezoelectric body 70 e is an example of a power generation element that generates power by vibration of the substrate 70 a.

  The electrode 70 d of the piezoelectric portion 70 b and the electrode 70 d of the piezoelectric portion 70 c are electrodes of the same polarity. The electrode 70f of the piezoelectric portion 70b and the electrode 70f of the piezoelectric portion 70c have the same polarity, and have an opposite polarity to the electrode 70d. For example, when the electrode 70d is a positive electrode, the electrode 70f is a negative electrode. The electric power generated by the power generation unit 70 is supplied to the signal transmission unit 90 via a power line (not shown) or the like.

  As described above, the power generation unit 70 includes the two piezoelectric units 70 b and 70 c, and the two piezoelectric units 70 b and 70 c are disposed to sandwich the substrate 70 a. Thereby, higher power can be generated as compared to the case where there is one piezoelectric portion. In addition, although the electric power generation part 70 demonstrated the example which has two piezoelectric parts 70b and 70c which pinch | interpose the board | substrate 70a above, the structure of the electric power generation part 70 is not limited to this. The power generation unit 70 may have at least one of the piezoelectric units 70 b and 70 c. The piezoelectric portions 70 b and 70 c are not formed up to the end on the free end 72 side of the substrate 70 a. When the free end 72 is bent by the magnet 60 or 61, the power generation unit 70 contacts the standing portions 50b and 51b. For example, the piezoelectric portions 70b and 70c may not be disposed at positions where the standing portions 50b and 51b contact and positions where the magnets 60 and 61 contact, of the substrate 70a.

  The main surface 73 is a surface of the substrate 70a facing the magnet 60, and is a surface on the Z-axis plus side of the substrate 70a. The second surface is the surface of the substrate 70a that faces the magnet 61, and is the surface on the Z axis minus side of the substrate 70a. The main surfaces 73 and 74 are surfaces facing in the substrate 70a. The major surface 73 is an example of the second surface, and the major surface 74 is an example of the first surface.

  As described above, the power generation switch 100 according to the present embodiment generates electric power by freely vibrating the power generation unit 70 by the magnetic force using the magnets 60 and 61. With such a configuration, wear and deterioration of the power generation unit 70 can be suppressed as compared with, for example, physically vibrating the power generation unit 70 physically by hooking a claw or the like on the power generation unit 70. That is, the power generation switch 100 capable of stably generating power can be realized.

  Referring back to FIG. 2B, the holder unit 80 is a member to which the arm unit 40 and the power generation unit 70 are fixed. The holder 80 is composed of an upper main body 80 a and a lower main body 80 b. The upper body portion 80a is formed with a through hole extending in the Z-axis direction. In the lower main body 80b, a convex 80c protruding to the X-axis positive side and the X-axis negative, a convex 80d projecting to the Z-axis positive side from the lower main body 80b, and a lower main body It has the convex part which protruded to the Z-axis negative | minus side from the part 80b. The convex portion 80c serves as a pivot around which the arm 40 pivots. The convex portion 80 d penetrates the through hole of the upper main body portion 80 a and protrudes from the upper main body portion 80 a toward the power generation portion 70. The protrusion 80 d and the protrusion protruding to the negative side of the Z axis are a protrusion for fixing the power generation unit 70 to the holder 80.

  Specifically, in the state where the holder 80 inserts the convex 80 d into the opening of the power generation unit 70, the power generation 70 (specifically, the fixed end 71) is formed by the upper main body 80 a and the lower main body 80 b. Sandwich). The fixed end 71 is fixed to the holder 80 by the upper base 50 and the lower base 51.

  Although the material which comprises the holder part 80 is not specifically limited, For example, the holder part 80 is formed from a metal material or a resin material. For example, the holder portion 80 may be formed of a nonmagnetic metal material.

  The spring 81 is, for example, a spring, and is a member that causes the arm 40 to rotate in the Z-axis plus direction by elasticity. The spring 81 has one end connected to the arm 40 and the other end in contact with the lower base 51. For example, one end is inserted into a recess formed in the arm 40. When the button portion 11 is operated and the arm portion 40 pivots in the Z-axis negative direction with the convex portion 80c as a pivot axis, the spring 81 is deformed. The arm portion 40 is pivoted in the Z-axis positive direction by the restoring force (elasticity) of the spring 81 being released from the applied stress and returning to the original shape. In addition, as long as the arm portion 40 can be rotated in the Z-axis plus direction, the invention is not limited to the spring 81 and may be realized by another elastic body.

  Here, the functional configuration of the input device 10 will be described with reference to FIG.

  FIG. 3 is a block diagram showing a functional configuration of the input device 10 according to the present embodiment.

  As shown in FIG. 3, the input device 10 includes a power generation unit 70 and a signal transmission unit 90 as a functional configuration. The signal transmission unit 90 includes an AC / DC converter 91, a DC / DC converter 92, an A / D converter 93, a control unit 94, and a transmission unit 95.

  As described above, in the power generation unit 70, the free end portion 72 freely vibrates to generate power, as the button unit 11 is operated. Here, the power generated by the power generation unit 70 is AC power. Therefore, the AC power is rectified by a rectifier circuit such as an AC / DC converter 91 and converted into DC power. The voltage of the converted direct current power is several tens of volts, for example, 50 volts. Then, the voltage adjustment circuit such as the DC / DC converter 92 reduces the voltage so that an excessive voltage is not applied to the control unit 94. For example, the voltage is reduced to about 3 V by the DC / DC converter 92. The reduced voltage is used as power for the control unit 94 and the transmission unit 95 to operate. That is, the control unit 94 and the transmission unit 95 operate only by the power supplied from the power generation unit 70.

  Further, the input device 10 includes an A / D converter 93 in parallel with the AC / DC converter 91 and the DC / DC converter 92. The AC power generated by the power generation unit 70 is converted by the A / D converter 93 into a digital signal. Then, the control unit 94 generates a signal to be transmitted from the transmission unit 95 by using the digital signal. That is, the input device 10 uses the AC power generated by the power generation device 20 both for the power for operating the control unit 94 and the transmission unit 95 and for the generation of the signal by the control unit 94.

  The control unit 94 generates a signal corresponding to the digital signal input from the A / D converter 93. That is, the control unit 94 generates a signal according to the free vibration of the free end portion 72 of the power generation unit 70. The control unit 94 may generate, for example, a signal according to the maximum value of the amplitude of the digital signal (that is, the maximum voltage) or a signal according to the frequency of the digital signal (that is, the vibration time of the free end 72). May be generated, or a signal using both may be generated. The control unit 94 may generate a signal according to at least one of the amplitude or the frequency of the free vibration of the free end portion 72 of the power generation unit 70. The control unit 94 may use the digital signal as it is as a signal to be transmitted. Further, the signal corresponding to the free vibration of the free end portion 72 is an example of a predetermined signal.

  The control unit 94 is configured by, for example, a microcomputer. The control unit 94 has a non-volatile memory storing an operation program for generating a signal to be transmitted, a volatile memory which is a temporary storage area for executing the program, a processor for executing the program, and the like. Control unit 94 may be realized by a dedicated circuit or the like.

  The transmission unit 95 is a communication circuit that transmits the signal generated by the control unit 94 wirelessly. In addition, although wireless communication is wireless communication using the communication standard of ZigBee (registered trademark) as an example, it is not limited to this, and communication standard such as wireless LAN (for example, Wi-Fi (registered trademark)) is used Wireless communication may be used.

[2. Detailed Configuration of Power Generation Device]
Next, the detailed configuration of the power generation device 20 will be described with reference to FIGS. 4A to 5B.

  FIG. 4A is a plan view of a power generation device 20 according to the present embodiment. FIG. 4B is a schematic plan view of the dashed line area of FIG. 4A. 4A and 4B, only the arm unit 40, the magnets 60 and 61, and the power generation unit 70 of the power generation device 20 are illustrated. 4A and 4B show a state in which the magnets 61 and 61 are attracted to the power generation unit 70 by magnetic force, and the power generation unit 70 is not bent.

  As shown to FIG. 4A, the magnet 60 is arrange | positioned at the Z-axis plus side of the free end part 72 in planar view. The magnet 60 has a long, substantially rectangular shape in a plan view, and is arranged such that the direction in which the connection portion 44 extends (the X-axis direction) is the long side. Although not shown in FIG. 4A, the magnet 61 is disposed on the negative Z-axis side of the free end portion 72.

  As shown in FIG. 4B, the magnets 60 and 61 have a substantially rectangular shape in which the direction in which the connecting portion 44 extends is the long side, but the shapes in plan view are different. Specifically, the magnet 60 is formed to be longer in the Y-axis direction than the magnet 61 in plan view. The magnet 61 is formed to be longer in the X-axis direction than the magnet 60 in plan view. That is, in plan view, magnets 60 and 61 each have a region (hereinafter also referred to as non-overlapping region) that does not overlap each other. Specifically, the magnet 60 is a non-overlapping area (see dot-shaped hatching in FIG. 4B) in which the opposing end in the Y-axis direction does not overlap the magnet 61 in plan view. The magnet 61 is a non-overlapping area (see hatching in FIG. 4B) in which the end facing in the X-axis direction does not overlap the magnet 60 in plan view.

  In the magnet 60 disposed on the Z-axis plus side with respect to the power generation unit 70, the convex part 44b is disposed on the Z-axis minus side with respect to the magnet 60. In the state of FIG. 4B, the magnet 60 is in the state of being placed on the convex portion 44b. Specifically, the surface on the Z axis minus side of the non-overlapping region in the magnet 60 is placed by the convex portion 44 b. That is, the surface on the Z axis minus side of the magnet 60 and the surface on the Z axis plus side of the convex portion 44 b are in contact with each other. The convex portions 44 b are formed on the surfaces of the non-overlapping regions present at both ends of the magnet 61 on the Z axis negative side. The convex portion 44 b is disposed at a position overlapping the magnet 60 and not overlapping the magnet 61 in plan view.

  Here, the cross-sectional structure of the power generation device 20 including the convex portion 44 b will be described with reference to FIG. 5A.

  FIG. 5A is a partial cross-sectional view of power generation device 20 according to the present embodiment, taken along line Va-Va in FIG. 4A. The arrows shown in FIG. 5A indicate the direction of rotation of the arm unit 40.

  As shown in FIG. 5A, convex portions 44b that are in contact with surfaces on the Z axis minus side of both ends in the Y axis direction of the magnet 60 are formed to project from the connecting portion 44. The convex portion 44 b is not in contact with the magnet 61. Thereby, the convex part 44b can move only the magnet 60 of the magnets 60 and 61 by rotation of the arm part 40. As shown in FIG.

  Specifically, when the arm unit 40 rotates in the negative Z-axis direction from the state shown in FIG. 5A, the magnet 60 is attracted to the power generation unit 70 by the magnetic force. Further, when the arm portion 40 pivots in the Z-axis plus direction from the state shown in FIG. 5A, the convex part 44b pushes up the magnet 60 in the Z-axis plus direction. Specifically, the convex portion 44b moves the magnet 60 in the Z-axis positive direction by contacting the magnet 60 when the arm portion 40 pivots in the Z-axis positive direction. Thereby, the power generation unit 70 (specifically, the free end 72) is attracted to the magnet 60 and warps in the Z-axis plus direction. In other words, the power generation unit 70 bends following the movement of the magnet 60. The convex portion 44 b is an example of a second convex portion.

  Further, on the Z-axis plus side of the magnet 60, a claw portion 44c is disposed. The claw portion 44 c suppresses the magnet 60 from jumping out of the arm portion 40 in the Z-axis plus direction. Thereby, magnet 60 can be detached from arm part 40, and it can control that the electric power generation amount of power generation device 20 falls. The claw portion 44c is disposed at a position that does not affect the free vibration when the magnet 60 is freely vibrated in a state where the magnet 60 is adsorbed to the power generation unit 70. The claw portion 44 c is disposed at a position not in contact with the magnet 60 when the power generation portion 70 freely vibrates in a state where the magnet 60 is adsorbed to the power generation portion 70.

  Further, in the magnet 61 disposed on the Z axis minus side with respect to the power generation unit 70, the convex part 44a is disposed on the Z axis plus side with respect to the magnet 61. The convex portion 44 a is formed to project from the surface on the Z axis minus side of the connection portion 44 toward the surface on the Z axis plus side in the non-overlapping region of the magnet 61. The convex portions 44 a are formed so as to project toward the surfaces on the Z axis plus side of the non-overlapping regions present at both ends of the magnet 60. That is, the convex portion 44 a is disposed at a position overlapping the magnet 61 and not overlapping the magnet 60 in plan view.

  Here, the cross-sectional structure of the power generation device 20 including the convex portion 44a will be described with reference to FIG. 5B.

  FIG. 5B is a partial cross-sectional view of power generation device 20 according to the present embodiment, taken along line Vb-Vb in FIG. 4A. The arrows shown in FIG. 5B indicate the direction of rotation of the arm unit 40.

  As shown in FIG. 5B, convex portions 44a that are in contact with the surfaces on the Z-axis plus side of both ends in the X-axis direction of the magnet 61 are formed so as to protrude from the connection portion 44. Also, the convex portion 44 a is not in contact with the magnet 60. Thereby, the convex part 44a can move only the magnet 61 of the magnets 60 and 61 by rotation of the arm part 40. As shown in FIG.

  Specifically, when the arm unit 40 pivots in the Z-axis plus direction from the state shown in FIG. 5B, the magnet 61 is attracted to the power generation unit 70 by the magnetic force. Further, when the arm portion 40 pivots in the Z-axis minus direction from the state shown in FIG. 5B, the convex part 44 a pushes the magnet 61 in the Z-axis minus direction. That is, the convex part 44a moves the magnet 61 in the Z-axis negative direction. Specifically, the convex portion 44 a moves the magnet 61 in the Z-axis negative direction by abutting on the magnet 61 when the arm portion 40 pivots in the Z-axis negative direction. Thus, the power generation unit 70 (specifically, the free end 72) is attracted to the magnet 61 and warps in the negative Z-axis direction. In other words, the power generation unit 70 bends following the movement of the magnet 61. The convex portion 44 a is an example of a first convex portion.

  Further, on the Z axis minus side of the magnet 61, a claw portion 44d is disposed. The claw portion 44 d prevents the magnet 61 from falling from the arm portion 40. Thereby, it is possible to suppress that the magnet 61 is detached from the arm 40 and the amount of power generation of the power generation switch 100 is reduced. The claw portion 44d is disposed at a position that does not affect the free vibration when the magnet 61 is freely vibrated in a state where the magnet 61 is adsorbed to the power generation unit 70. The claw portion 44 d is disposed at a position not in contact with the magnet 61 when the power generation portion 70 freely vibrates in a state where the magnet 61 is adsorbed to the power generation portion 70.

[3. Operation of power generation switch]
Next, the operation of the power generation switch 100 will be described with reference to FIGS. 6 and 7.

  6 is a cross-sectional view of input device 10 according to the present embodiment, taken along line VI-VI of FIG. FIG. 6 shows a state in which the button portion 11 is operated and the power generation unit 70 is attracted to the magnets 60 and 61 by magnetic force. In this state, the power generation unit 70 is not warped. Further, erected portions 50 b and 51 b are disposed so as to sandwich the power generation portion 70. Hereinafter, the operation in the portion within the dashed line area in FIG. 6 will be described.

  FIG. 7 is a schematic view showing the operation of the power generation switch 100 according to the present embodiment. FIG. 7 schematically shows the operation of the portion of the power generation switch 100 in the broken line area in FIG. In FIG. 7, the movement of the arm unit 40 is indicated by a solid arrow, and the movement of the power generation unit 70 is indicated by a broken arrow.

  (A) of FIG. 7 is a figure which shows the state before the button part 11 is operated. In the following, the state before the button unit 11 is operated is also referred to as an initial state.

  As shown in (a) of FIG. 7, in the initial state, the arm portion 40 is regulated by the spring 81 so as to be inclined toward the Z-axis plus side. The magnet 60 is in contact with the projection 44 b and is held by the arm 40. The magnet 60 is in a state of being mounted on the convex portion 44 b. In the initial state, the power generation unit 70 and the magnet 60 are not in contact with each other. The restoring force of the spring 81 is stronger than the attractive force of the magnet 60 and the power generation unit 70 due to the magnetic force.

  In the initial state, the magnet 61 is attracted to the power generation unit 70 by the magnetic force. In this state, the convex portion 44 a is not in contact with the magnet 61.

  In (b) of FIG. 7, when the button unit 11 is operated and the arm unit 40 is rotated, the magnet 60 held by the arm unit 40 and the power generation unit 70 are in contact with each other by the magnetic force.

  As shown in FIG. 7B, in this state, the magnets 60 and 61 are magnetically attracted to the free end 72 of the power generation unit 70. Specifically, the magnet 60 is attracted to the major surface 73 of the substrate 70a, and the magnet 61 is attracted to the major surface 74 of the substrate 70a. Moreover, the convex part 44a is contact | abutted with the magnet 61 in this state.

  (C) of FIG. 7 is a figure which shows the state which the button part 11 was further operated from the state of (b) of FIG. 7, and the arm part 40 rotated in the Z-axis minus direction.

  As shown in (c) of FIG. 7, when the arm portion 40 rotates, the convex portion 44 a pushes the magnet 61 downward in the Z-axis negative direction. Since the magnet 61 attracts the power generation unit 70 by the magnetic force, the power generation unit 70 is bent following the movement of the magnet 61. (C) of FIG. 7 shows a state in which the power generation unit 70 is bent and the power generation unit 70 is in contact with the standing portion 51 b. When the magnet 61 moves in the negative Z-axis direction, the standing portion 51b contacts the main surface 74 of the substrate 70a that has been bent following the movement of the magnet 61. In other words, the standing portion 51b restricts the movement of the substrate 70a in the negative Z-axis direction by contacting the main surface 74 when the magnet 61 moves in the negative Z-axis direction.

  When the convex portion 44 a moves the magnet 61 in the negative Z-axis direction, the magnet 60 is attracted to the free end portion 72 of the power generation unit 70. Specifically, the magnet 60 is attracted to the main surface 73 by the magnetic force.

  FIG. 7D is a view showing free vibration generated by the movement of the magnet 61. As shown in FIG.

  As shown in (d) of FIG. 7, the arm portion 40 further rotates in the Z-axis negative direction from the state of (c) of FIG. 7, and the attraction force due to the magnetic force of the magnet 61 and the power generation portion 70 When the force increases, the magnet 61 and the power generation unit 70 are pulled apart, and the power generation unit 70 starts free vibration. That is, the power generation unit 70 is released from being attracted to the magnet 61. Specifically, the substrate 70a is released from the magnet 61 by the magnet 61 moving in the Z-axis negative direction, and starts free vibration by returning in the Z-axis positive direction.

  Since the erected portion 51b is disposed, the deflection of the power generation portion 70 in the negative Z-axis direction is restricted by the erected portion 51b. In other words, the erected portion 51b can make the deflection of the power generation unit 70 substantially constant when the magnet 61 and the power generation unit 70 are released from the adsorbed state. Since the amount of power generation changes according to the amount of deflection, variations in the amount of power generation can be reduced by the standing portion 51b. In addition, since the power generation unit 70 can be prevented from being excessively deformed and fatigue-destructed, the durability of the power generation switch 100 can be improved. The distance between the power generation unit 70 and the upright portion 51 b may be determined, for example, such that the stress applied to the power generation unit 70 does not reach the maximum stress.

  The free vibration generated by the movement of the magnet 61 in the negative Z-axis direction is an example of the first free vibration. Further, the power generated by the power generation unit 70 by the first free vibration is supplied to the signal transmission unit 90.

  Then, the arm portion 40 is rotated in the Z-axis positive direction by the restoring force of the spring 81, and the magnet 61 is moved in the Z-axis positive direction by the suction force with the power generation unit 70. Since the vibration time of the free vibration is short, when the magnet 61 and the power generation unit 70 are attracted again by the attraction force by the magnetic force, the free vibration is settled.

  Thereby, for example, the state shown in FIG. 7B is restored. Furthermore, the arm portion 40 is rotated in the Z-axis positive direction by the restoring force of the spring 81.

  (E) of FIG. 7 is a diagram showing a state in which the arm portion 40 is further rotated in the Z-axis positive direction by the restoring force of the spring 81 from the state shown in (b) of FIG. 7.

  As shown in (e) of FIG. 7, when the arm portion 40 rotates, the convex portion 44 b pushes up in the Z-axis plus direction while holding the magnet 60. Since the magnet 60 attracts the power generation unit 70 by the magnetic force, the power generation unit 70 is bent following the movement of the magnet 60. (E) of FIG. 7 shows a state in which the power generation unit 70 is bent and is in contact with the standing portion 50b. When the magnet 60 moves in the Z-axis positive direction, the standing portion 50b contacts the main surface 73 of the substrate 70a which has been bent following the movement of the magnet 60. In other words, the standing portion 50b restricts the movement of the substrate 70a in the Z-axis positive direction by contacting the main surface 73 when the magnet 60 moves in the Z-axis positive direction.

  When the convex portion 44 b moves the magnet 60 in the Z-axis plus direction, the magnet 61 is attracted to the free end portion 72 of the power generation unit 70. Specifically, the magnet 61 is attracted to the main surface 74 by magnetic force.

  (F) of FIG. 7 is a figure which shows the free vibration which arose by the movement of the magnet 60. As shown in FIG.

  As shown in (f) of FIG. 7, the arm portion 40 is further rotated to the Z-axis plus side from the state of (e) of FIG. 7, and the attraction force due to the magnetic force between the magnet 60 and the power generation portion 70 When the force increases, the magnet 60 and the power generation unit 70 are pulled apart, and the power generation unit 70 starts free vibration. That is, the power generation unit 70 is released from being attracted to the magnet 60. In other words, the substrate 70a is released from the magnet 60 by moving the magnet 60 in the Z-axis positive direction, and starts free vibration by returning in the Z-axis negative direction.

  Since the erected portion 50b is disposed, the deflection of the power generation portion 70 in the positive Z-axis direction is restricted by the erected portion 50b. In other words, since the erected portion 50b can make the deflection of the power generation unit 70 substantially constant when released from the state where the magnet 60 and the power generation unit 70 are adsorbed, the variation of the power generation amount is reduced. Can. In addition, since the power generation unit 70 can be prevented from being excessively deformed and fatigue-destructed, the durability of the power generation switch 100 can be improved. For example, the distance between the power generation unit 70 and the standing portion 50 b may be determined, for example, such that the stress applied to the power generation unit 70 does not reach the maximum stress.

  The free vibration generated by the movement of the magnet 60 in the Z-axis plus direction is an example of a second free vibration. Further, the power generated by the power generation unit 70 by the second free vibration is supplied to the signal transmission unit 90.

  Then, the arm portion 40 is pivoted toward the Z-axis plus side by the restoring force of the spring 81, and the magnet 60 returns to the initial state shown in FIG. 7A while being held by the arm portion 40. Thus, a series of operations by the power generation switch 100 are completed.

  As described above, in the power generation switch 100 according to the present embodiment, the arm portion 40 is rotated relative to the holder portion 80 in the negative Z-axis direction, whereby the power generation switch 70 is fixed to the holder portion 80. Moving the magnet 61 disposed on the Z axis minus side with respect to the free end 72 and attracting the free end 72 by magnetic force in the Z axis minus direction, and the restoring force of the spring 81 causes the arm 40 to move in the Z axis plus direction By rotating it toward the Z-axis plus side with respect to the free end 72, power is generated by moving the magnet 60 which attracts the free end 72 by magnetic force in the Z-axis plus direction. That is, the power generation switch 100 can generate power twice when the button portion 11 is operated once.

  Here, the distance between the substrate 70a and the standing portions 50b and 51b will be described.

  When the distance between the substrate 70a and the standing portions 50b and 51b is large, the amplitude of free vibration by the power generation unit 70 is large. By changing the distance between the substrate 70a and the standing portions 50b and 51b, that is, the positions where the standing portions 50b and 51b are disposed, it is possible to change the power generation waveform of the power generated by the power generation unit 70. In the present embodiment, as shown in FIG. 7B, the distance L1 between the power generation unit 70 (that is, the substrate 70a) and the standing portion 50b, and the distance between the power generation unit 70 (that is, the substrate 70a) The distance L2 to the portion 51b is approximately equal. In this case, the first free vibration and the second free vibration become substantially equal vibrations, and power generation waveforms of power generated thereby become substantially equal.

  In addition, the control unit 94 generates a first signal according to the first free vibration, and generates a second signal according to the second free vibration. Specifically, the control unit 94 generates a first signal according to at least one of the amplitude and the frequency of the first free vibration, and the second according to at least one of the amplitude and the frequency of the second free vibration. Generate a signal of In the present embodiment, since the amplitudes and frequencies of the first free vibration and the second free vibration are substantially equal, the first signal and the second signal generated by the control unit 94 become the same signal. As a result, the input device 10 can transmit the same signal twice, so the reception probability at the receiver that receives the signal transmitted by the input device 10 can be improved.

  In the present embodiment, although the examples in which the distances L1 and L2 are substantially equal have been described, the distances L1 and L2 are not limited to being substantially equal. The distances L1 and L2 may be different. For example, the distance L1 may be larger than the distance L2. Thereby, the amplitudes of the first free vibration and the second free vibration can be changed. Also, the first free vibration and the second free vibration can be changed, for example, by the weight of the magnets 60 and 61. For example, if the magnets 60 and 61 are light, the frequency of free vibration will be high and the damping time will be short. As described above, by adjusting at least one of the distances L1 and L2 and the weight of the magnets 60 and 61, the first free vibration and the second free vibration can be made different from each other.

[4. effect]
As described above, the power generation switch 100 according to the present embodiment is fixed to the holder 80, the arm 40 rotating relative to the holder 80 in the negative Z-axis direction and the positive Z-axis direction, and the holder 80. Fixed end 71 and a free end 72 freely vibrating in the Z-axis positive direction and the Z-axis negative direction, and the free end 72 is released from being attracted and attracted by magnetic force A power generation unit 70 which takes the state, a magnet 61 disposed on the Z axis minus side of the free end 72 and attracting the free end 72 by magnetic force, and a magnet 61 placed on the Z axis plus side of the free end 72; And a magnet 60 for attracting the free end 72 by a magnetic force. Then, the arm portion 40 contacts the magnet 61 when rotating in the Z-axis negative direction, and contacts the magnet 60 when rotating in the Z-axis positive direction. And a convex portion 44b to be moved in the Z-axis positive direction.

  As a result, when the arm unit 40 is rotated in the negative Z-axis direction and the positive Z-axis direction, the power generation unit 70 can freely vibrate to generate electric power. That is, the power generation switch 100 can generate power twice by one operation of the arm unit 40 (that is, one reciprocation). Therefore, since the amount of power generation of the power generation switch 100 is increased, the power generation performance can be improved.

  The power generation unit 70 is disposed on the substrate 70a having magnetism, which is attracted by the magnet 61 and warps in the negative Z-axis direction, and is attracted by the magnet 60 and warps in the positive Z-axis direction. And piezoelectric portions 70 b and 70 c that generate electric power by the vibration of After the magnet 61 moves in the Z-axis minus direction, the substrate 70 a returns to the Z-axis plus direction and vibrates freely, and after the magnet 60 moves in the Z-axis plus direction, the substrate 70 a moves in the Z-axis minus direction. It vibrates freely by returning.

  As a result, when the power generation unit 70 includes the magnetic substrate 70 a, the power generation unit 70 can be realized with a simple configuration. For example, when the substrate 70a does not have magnetism, the power generation unit 70 needs to have a magnet plate and the like attracted by the magnets 60 and 61 and the magnetic force, and the configuration becomes complicated.

  Further, the substrate 70 a has a main surface 74 facing the magnet 61 and a main surface 73 facing the magnet 60. The power generation switch 100 is further disposed on the Z axis minus side of the substrate 70a, and when the magnet 61 moves in the Z axis minus direction, the power generation switch 100 contacts the main surface 74 to move the substrate 70a in the Z axis minus direction. The standing portion 51b for restricting movement and the substrate 70a are disposed on the Z-axis plus side, and when the magnet 60 moves in the Z-axis plus direction, the magnet 60 contacts the main surface 73 to move the substrate 70a in the Z-axis plus direction. And a standing portion 50b for restricting movement.

  Thereby, the positions at which the power generation unit 70 and the magnet 60 are separated and the positions at which the power generation unit 70 and the magnet 61 are separated (that is, the amount of warpage of the power generation unit 70 immediately before the start of free vibration) are substantially constant. Since it can, it can control the variation of the amount of generated electricity. In addition, since the amount of warpage of the power generation unit 70 can be suppressed and fatigue failure can be suppressed, the durability of the power generation unit 70 can be improved. Thus, the power generation performance of the power generation switch 100 is further improved.

  Further, the distance between the substrate 70a and the standing portion 51b may be equal to the distance between the substrate 70a and the standing portion 50b.

  This makes it possible to make the amounts of power generated in the two power generations approximately equal. Since the power generation switch 100 can perform power generation of approximately the same amount of power generation twice, power generation performance is further improved.

  Further, the distance between the substrate 70a and the standing portion 51b may be different from the distance between the substrate 70a and the standing portion 50b. For example, the distance between the substrate 70a and the standing portion 51b may be larger than the distance between the substrate 70a and the standing portion 50b.

  This makes it possible to make the amount of power generated in the two power generations different. Since the power generation switch 100 can perform power generation with different amounts of power generation twice, power generation performance is further improved. For example, it is possible to increase the amount of power generation generated by free vibration generated by the magnet 61 moving in the Z-axis negative direction.

  Further, when viewed from the Z-axis direction, the convex portion 44 a overlaps the magnet 61 and is not disposed so as to overlap the magnet 60, and the convex portion 44 b overlaps the magnet 60 but does not overlap the magnet 61. Placed in position.

  Thus, only the magnet 61 can be moved when the arm 40 rotates in the Z-axis negative direction, and only the magnet 60 can be moved when the arm 40 rotates in the Z-axis positive direction. . Moreover, the structure of the arm part 40 can be made into a simple structure by using the magnets 60 and 61 from which the shape when it sees from Z-axis direction differs.

  The magnet 61 is attracted to the free end 72 when the convex portion 44b moves the magnet 60 in the Z-axis positive direction, and the magnet 60 causes the convex portion 44a to move the magnet 61 in the Z-axis negative direction. When the free end 72 is attracted.

  Thus, the magnets 60 and 61 can be used as a weight of the power generation unit 70.

  As described above, in the input device 10 according to the present embodiment, the control unit 94 generates the transmission signal according to the free vibration of the power generation switch 100 described above, the power generation unit 70, and the control unit 94. And a transmitter 95 for transmitting the generated signal. Then, the power generation unit 70 supplies the power generated by the free vibration to the control unit 94 and the transmission unit 95.

  Thereby, the power generation switch 100 described above can be used for the input device 10 that transmits a signal according to the free vibration. In addition, since the control unit 94 and the transmission unit 95 can operate using the power generated by the power generation unit 70, the input device 10 may not include a battery or the like.

  In addition, the control unit 94 generates a first signal as a signal according to the first free vibration that is free vibration generated by the movement of the magnet 61 in the Z-axis minus direction, and the control unit 94 generates the first signal in the Z-axis plus direction of the magnet 60. A second signal is generated as a signal corresponding to a second free vibration that is a free vibration generated by the movement.

  Thereby, the input device 10 can generate and transmit a signal at each of two times of power generation by the power generation unit 70. Therefore, the input device 10 with improved convenience can be realized.

  Further, the control unit 94 generates a first signal according to at least one of the amplitude or frequency of the first free vibration, and generates a second signal according to at least one of the amplitude or frequency of the second free vibration. Generate

  Thereby, the control unit 94 can generate different signals when the amplitudes or frequencies of the first and second free vibrations are different. A state in which the button portion 11 is not pressed is in a pressed state (that is, a state in which the arm portion 40 rotates in the Z-axis negative direction) and a state in which the button portion 11 is not pressed (that is, When a different signal is transmitted when the arm unit 40 turns in the Z-axis plus direction), the receiver determines the input device 10 by checking the signal. can do. For example, by installing the input device 10 in a chair, it is possible to determine whether a person has sat in the chair or whether the person has left the chair by confirming a signal from the input device 10. Therefore, since the input device 10 can be used as a sensor (for example, a human sensor), the convenience of the input device 10 is improved. The input device 10 can also be used as a sensor that detects the opening and closing of a door.

(Other embodiments)
Although the power generation switch 100 and the input device 10 according to the embodiment have been described above based on the embodiment, the present disclosure is not limited to this embodiment.

  Therefore, among the components described in the attached drawings and the detailed description, not only components essential for solving the problem but also components not essential for solving the problem in order to exemplify the above-mentioned technology May also be included. Therefore, the fact that those non-essential components are described in the attached drawings and the detailed description should not immediately mean that those non-essential components are essential.

  For example, although the control part 94 demonstrated the example which produces | generates the signal according to the free vibration of the electric power generation part 70 in the said embodiment, it is not limited to this. For example, the control unit 94 may generate a signal not indicating a signal corresponding to free vibration but indicating, for example, unique identification information assigned to each input device 10.

  Moreover, although the input device 10 demonstrated the example which transmits a signal when the button part 11 is operated in the said embodiment, operation | movement of the input device 10 is not limited to transmitting a signal. For example, the input device 10 may perform an operation such as emitting light or emitting a sound when operated, or may perform another operation. That is, the use application of the electric power which generate | occur | produced by operating the button part 11 is not specifically limited.

  Moreover, although the arm part 40 demonstrated the example rotated by setting the convex part 80c as a rotational axis by operating the button part 11 in the said embodiment, it is not limited to rotating the arm part 40. FIG. For example, the arm unit 40 may move in a direction parallel to the direction in which the button unit 11 is pressed. If it is an example of the above-mentioned embodiment, arm part 40 may be pushed down in the direction of the Z axis minus by pushing button part 11. The movement of the arm 40 in the Z-axis positive direction and the Z-axis negative direction means that the arm 40 rotates in the Z-axis positive direction and the Z-axis negative direction as described in the above embodiment, It is intended that the arm portion 40 be pushed down and pushed up in a direction substantially parallel to the Z axis.

  In the above embodiment, the power generation unit 70 is described as being fixed to the holder 80 at one end (specifically, the fixed end 71), but the position at which the power generation unit 70 is fixed is free. There is no particular limitation as long as the end 72 can generate a desired power by free vibration. For example, the power generation unit 70 may be fixed to the holder unit 80 at a central position in the Y-axis direction. In this case, the central portion of the power generation unit 70 is an example of a fixing unit fixed to the holder unit 80. The power generation unit 70 may be fixed to the holder unit 80 at another position.

  Moreover, although the board | substrate 70a demonstrated the example comprised with a magnetic metal material in the said embodiment, it is not limited to this. For example, the substrate 70a may be made of a nonmagnetic metal material. For example, the substrate 70a may be made of stainless steel or aluminum alloy. A magnetic plate made of a magnetic material may be fixed to at least one surface of the free end 72. Since the power generation described above can be performed by the attraction of the magnets 60 and 61 and the magnetic plate by the magnetic force, the power generation performance of the power generation switch 100 is improved even when the substrate 70a is made of a nonmagnetic metal material. Do. In this case, the magnetic plate may be formed to extend in the direction in which the magnets 60 and 61 extend.

  Moreover, although the said embodiment demonstrated the example which has the piezoelectric material 70e which produces electric power by vibrating the electric power generation part 70, the structure of the electric power generation part 70 is not limited to this. The power generation unit 70 may have an elastically deformable magnetostrictive element made of a magnetostrictive material. For example, the power generation unit 70 may have a configuration in which two plate-like magnetostrictive elements wound with a coil are arranged in parallel. Thereby, the free end portion 72 of the power generation unit 70 freely vibrates to generate a voltage (electromotive force) based on the law of electromagnetic induction. That is, the configuration of the power generation unit 70 is not particularly limited as long as the power generation unit 70 has a configuration for generating power by vibration. In this case, the magnetostrictive element is an example of a power generation element that generates power by vibration of the substrate 70a.

  Moreover, although the said embodiment demonstrated the example which has the area | region which does not mutually overlap the shape of the magnets 60 and 61 in planar view, it is not limited to this. For example, only one of the magnets is moved in the Z-axis negative direction when the arm 40 rotates in the Z-axis negative direction, and only the other magnet is moved in the Z-axis positive direction when the arm 40 rotates in the Z-axis positive direction. The shapes of the magnets 60 and 61 are not limited to different ones as long as they are moved.

  In the above embodiment, after the magnet 61 is pushed by the convex portion 44a and separated from the power generation unit 70, the magnet 61 and the power generation unit 70 re-adhere by the magnetic force, but the present invention is not limited thereto. For example, the claws formed in the arm 40 contact the magnet 61 and the arm 61 rotates in the Z-axis plus direction by the restoring force of the spring 81 so that the magnet 61 moves in the Z-axis plus direction. It may move or may be another method.

  Moreover, although the said embodiment demonstrated the example which the magnet 60 adsorb | sucks with the electric power generation part 70, when the electric power generation part 70 vibrates freely by the magnet 61, it is not limited to this. When the power generation unit 70 freely vibrates due to the magnet 61, the magnet 60 may not be attracted to the power generation unit 70. The same applies to the case where the magnet 60 causes the power generation unit 70 to freely vibrate.

  In addition, an embodiment obtained by applying various modifications to those skilled in the art to the embodiment, or an embodiment realized by arbitrarily combining components and functions in the embodiment without departing from the scope of the present disclosure. Are also included in the present disclosure.

  The power generation switch according to the present disclosure can be used as a power generation switch that generates free vibration by the magnetic force to generate power.

DESCRIPTION OF SYMBOLS 10 input device 11 button part 12 cover part 12a, 46 opening part 12b, 13a, 41, 44a, 44b, 80c, 80d convex part 12c, 44c, 44d, 51c claw part 13 case part 20 electric power generating apparatus 30 pressing part 30a, 50a , 51a body portion 30b standing portion 30c bending portion 40 arm portion (moving portion)
42, 43 arm 44, 45 connection portion 50 upper base portion 50b standing portion (second stopper)
50c Notch portion 51 Lower base portion 51b Standing portion (first stopper)
60 magnet (second adsorber)
61 Magnet (first adsorber)
70 Power Generation Unit 70a Substrate 70b, 70c Piezoelectric Unit (Power Generation Element)
70d, 70f electrode 70e piezoelectric body (power generation element)
71 Fixed end (fixed part)
72 free end 73 main surface (second surface)
74 main surface (first surface)
80 Holder portion 80a Upper body portion 80b Lower body portion 81 Spring 90 Signal transmission portion 90a Mounting substrate 91 AC / DC converter 92 DC / DC converter 93 A / D converter 94 Control portion 95 Transmission portion 100 Power generation switch

Claims (11)

A holder portion,
A moving unit in which at least a portion moves relative to the holder in a first direction and a second direction opposite to the first direction;
It has a fixed part fixed to the holder part and a free end that freely vibrates in the first direction and the second direction, and the free end is attracted by the magnetic force and the adsorbed A power generation unit that takes a state of being released from the state;
A first adsorber disposed on the first direction side with respect to the free end and attracting the free end by the magnetic force;
And a second adsorber disposed closer to the second direction than the free end and attracting the free end by the magnetic force.
The moving part is in contact with the first adsorber when moving in the first direction to move the first adsorber in the first direction, and the second convex part And a second convex portion which abuts on the second adsorber to move the second adsorber in the second direction when moving in the second direction.
Power generation switch. The power generation unit is
A substrate having magnetism which is attracted by the first adsorber and warps in the first direction, and is attracted by the second adsorber and warps in the second direction;
A power generation element disposed on the substrate and generating electric power by vibration of the substrate;
The substrate is
After the first adsorbent moves in the first direction, it returns to the second direction and vibrates, thereby causing the free vibration.
After the second adsorbent moves in the second direction, it returns to the first direction and vibrates to vibrate freely,
The power generation switch according to claim 1. The substrate is
A first surface facing the first adsorbent;
And a second surface facing the second adsorber,
The power generation switch is further
It is disposed on the first direction side with respect to the substrate, and the first adsorbing member contacts the first surface when moving in the first direction, whereby the substrate is moved in the first direction. A first stopper that regulates movement,
It is disposed on the second direction side with respect to the substrate, and when the second adsorbent moves in the second direction, the substrate comes into contact with the second surface to move in the second direction. And a second stopper that regulates movement.
The power generation switch according to claim 2. The distance between the substrate and the first stopper is equal to the distance between the substrate and the second stopper.
The power generation switch according to claim 3. The distance between the substrate and the first stopper is different from the distance between the substrate and the second stopper,
The power generation switch according to claim 3. The distance between the substrate and the first stopper is greater than the distance between the substrate and the second stopper,
The power generation switch according to claim 5. The first convex portion is disposed at a position not overlapping the first adsorber and not overlapping the second adsorber when viewed from the first direction.
The second convex portion is disposed at a position not overlapping the second adsorber and not overlapping the first adsorber when viewed from the first direction.
The power generation switch according to any one of claims 1 to 6. The first adsorbent is adsorbed to the free end when the second convex portion is moving the second adsorbent in the second direction,
The second adsorbent is adsorbed to the free end when the first convex portion is moving the first adsorbent in the first direction.
The power generation switch according to any one of claims 1 to 7. The power generation switch according to any one of claims 1 to 8,
A control unit that generates a signal according to the free vibration of the power generation unit;
A transmitter for transmitting the signal;
The power generation unit supplies the power generated by the free vibration to the control unit and the transmission unit.
Input device. The control unit
Generating a first signal as the signal according to a first free vibration that is the free vibration generated by the movement of the first adsorber in the first direction;
Generating a second signal as the signal according to a second free vibration that is the free vibration generated by the movement of the second adsorber in the second direction;
The input device according to claim 9. The control unit
Generating the first signal according to at least one of an amplitude or a frequency of the first free vibration;
Generating the second signal according to at least one of the amplitude or the frequency of the second free vibration;
The input device according to claim 10.

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