JP2019201489A - Power generation device and input device - Google Patents

Abstract

To provide a power generation device and an input device that can reduce a power loss.SOLUTION: A power generation device 1 includes a movable part 3, a coil, and a rectifier circuit 4. The movable part 3 moves between a first position and a second position. The coil 21 generates a first current that flows in a first current direction when the movable part 3 moves from the second position to the first position, and generates a second current that flows in a second current direction opposite to the first current direction when the movable part 3 moves from the first position to the second position. The rectifier circuit 4 receives the first current and the second current from the coil 21 and outputs an output current that flows in a predetermined direction. The rectifier circuit 4 includes a first switch SW1 that is turned on when the movable part 3 moves from the second position to the first position, and is turned off when the movable part 3 moves from the first position to the second position.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates generally to a power generation device and an input device, and more particularly to a power generation device that generates electric power as a movable unit moves and an input device including the power generation device.

  2. Description of the Related Art Conventionally, there is a power generation device that generates power using an electromotive force of a coil (see, for example, Patent Document 1).

  The power generation device of Patent Document 1 includes a rod-shaped central yoke and two rod-shaped magnet members. A coil is wound around the central yoke. The two magnet members are arranged so that their magnetic poles are reversed. The central yoke is disposed between the two magnet members.

  The two magnet members are fixed to the drive member. The drive member is connected to the knob and moves in the left-right direction in accordance with the slide of the knob. The two magnet members held by the drive member move in the left-right direction.

  By sliding the knob, the magnetic flux passing through the central yoke is switched in the reverse direction. This change in magnetic flux generates an electromotive force in the coil.

International Publication No. 2016/143262

  In power generation devices, reduction of power loss is desired.

  The present disclosure has been made in view of the above-described reasons, and an object thereof is to provide a power generation device and an input device that can reduce power loss.

  A power generation device according to one embodiment of the present disclosure includes a movable part, a coil, and a rectifier circuit. The movable part moves between a first position and a second position. The coil generates a first current that flows in a first current direction when the movable part moves from the second position to the first position, and the movable part from the first position to the second position. Generates a second current that flows in a second current direction opposite to the first current direction. The rectifier circuit receives the first current and the second current from the coil and outputs an output current flowing in a predetermined direction. The rectifier circuit is turned on when the movable part moves from the second position to the first position, and is turned off when the movable part moves from the first position to the second position. Including a switch.

  An input device according to an aspect of the present disclosure includes the power generation device, an input unit, and a communication unit. The input unit moves the movable unit. The communication unit is electrically connected between output terminals of the rectifier circuit and transmits a radio signal.

  The present disclosure has an effect that power loss can be reduced.

FIG. 1 is a block diagram of an input device including a power generation device according to an embodiment of the present disclosure. FIG. 2 is a schematic configuration diagram of a state where the movable part is located at the first position in the above power generator. FIG. 3 is a schematic configuration diagram of a state in which the movable portion in the power generator is located at the second position. FIG. 4 is a waveform diagram of voltages at both ends of each of the coil, the output-side capacitor, and the input-side capacitor when chattering occurs in the first switch of the above power generator. FIG. 5 is a graph of output power with respect to the capacitance of the input-side capacitor in the above power generator. FIG. 6 is a schematic configuration diagram of a state in which the movable portion in the power generation device according to the first modification example of the embodiment of the present disclosure is located at the first position.

  Embodiments and modifications described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments and the modifications. Even if it is except this embodiment and a modification, if it is a range which does not deviate from the technical idea of this indication, various changes are possible according to a design etc.

(Embodiment 1)
(1) Outline The power generation device 1 according to the present embodiment is a power generation device that generates electric power by converting kinetic energy of the movable portion 3 accompanying movement of the movable portion 3 into electric energy.

  As shown in FIG. 1, the power generation apparatus 1 according to the present embodiment includes a power generation unit 2, a movable unit 3, and a rectifier circuit 4.

  As shown in FIG. 2, the power generation unit 2 has a coil 21. The movable portion 3 is configured to be movable with respect to the coil 21 and has two magnets (a first magnet 311 and a second magnet 321). The coil 21 is disposed between two magnets (a first magnet 311 and a second magnet 321). The two magnets (the first magnet 311 and the second magnet 321) are in a first direction S1 in which the two magnets (the first magnet 311 and the second magnet 321) and the coil 21 are arranged (the left-right direction in FIGS. 2 and 3). The reciprocating movement is possible. The two magnets (the first magnet 311 and the second magnet 321) are configured to move together in the first direction S1. Therefore, when one of the two magnets (the first magnet 311 and the second magnet 321) moves so as to approach the coil 21, the other magnet moves so as to move away from the coil 21. Further, when one of the two magnets (the first magnet 311 and the second magnet 321) moves away from the coil 21, the other magnet moves so as to approach the coil 21. In the following description, the position where the first magnet 311 is closest to the coil 21 and the second magnet 321 is farthest from the coil 21 is referred to as a first position (position in FIG. 2). The position at which the first magnet 311 is farthest from the coil 21 and the second magnet 321 is closest to the coil 21 is defined as a second position (position in FIG. 3). That is, the movable part 3 is configured to be able to reciprocate between the first position and the second position. When two magnets (the first magnet 311 and the second magnet 321) move with respect to the coil 21, the magnetic flux passing through the coil 21 changes, and the coil 21 generates a current by electromagnetic induction.

  The two magnets (the first magnet 311 and the second magnet 321) are arranged so that the magnetic polarities are opposite to each other, and the direction of the magnetic flux generated to pass through the coil 21 when approaching the coil 21 Are opposite to each other. The direction of the magnetic flux when the movable part 3 is in the first position is indicated by φ1 in FIG. 2, and the direction of the magnetic flux when the movable part 3 is in the second position is indicated by φ2 in FIG. Therefore, the direction of the magnetic flux passing through the coil 21 is reversed according to the direction in which the movable part 3 (the first magnet 311 and the second magnet 321) moves between the first position and the second position. Thereby, the polarity of the current generated by the coil 21 is reversed according to the direction in which the movable part 3 moves between the first position and the second position. In the present embodiment, when the movable part 3 moves from the second position to the first position, the polarity of the current generated by the coil 21 is “positive”, and when the movable part 3 moves from the first position to the second position. In addition, the polarity of the current generated by the coil 21 is “negative”.

  In other words, when the movable part 3 moves from the second position to the first position, a first current (positive current) flowing in the first current direction is generated in the coil 21. Further, when the movable portion 3 moves from the first position to the second position, a second current (negative current) flowing in the second current direction is generated in the coil 21. Here, the second current direction is opposite to the first current direction.

  The power generation device 1 of this embodiment includes a rectifier circuit 4 (see FIG. 1) in order to align the polarity of the output current supplied to the load (in this embodiment, the communication unit 7). The rectifier circuit 4 is configured to full-wave rectify the current generated by the coil 21. Here, full-wave rectification is a rectification operation that aligns the polarity of the output current to be output regardless of whether the polarity of the current input to the rectifier circuit 4 is positive or negative (first current, second current). . That is, when the first current flowing in the first current direction is input from the coil 21, the direction of the output current output from the rectifier circuit 4 and the second current flowing in the second current direction is input from the coil 21. The directions of the output currents output from the rectifier circuit 4 are the same predetermined directions. In other words, if the rectifier circuit 4 is configured to output an output current flowing in a predetermined direction when a current flowing in the first current direction is input from the coil 21, the rectifier circuit 4 is in the second current direction. When the flowing second current is input from the coil 21, an output current flowing in a predetermined direction is output.

  In the present embodiment, a positive or negative current is input to the rectifier circuit 4 according to the direction in which the movable part 3 moves. The rectifier circuit 4 has a bridge circuit of two diodes (first diode D1, second diode D2) and two switches (first switch SW1, second switch SW2). The rectifier circuit 4 includes a series circuit of a first diode D1 and a second diode D2, and a series circuit of a first switch SW1 and a second switch SW2 between the first input terminal P11 and the second input terminal P12. Are connected in parallel. The connection point between the first diode D1 and the second diode D2 is the positive output terminal P21, and the connection point between the first switch SW1 and the second switch SW2 is the negative output terminal P22. Between the output terminals P21 and P22 of the rectifier circuit 4, the communication unit 7 as a load is electrically connected.

  The first switch SW <b> 1 and the second switch SW <b> 2 are mechanical switches, and are configured such that the on / off state is switched by the movement of the movable portion 3. The first switch SW1 is turned on when the movable part 3 is moved from the second position to the first position, and is turned off when the movable part 3 is moved from the first position to the second position. It is configured. The second switch SW2 is turned on when the movable part 3 moves from the first position to the second position, and is turned off when the movable part 3 moves from the second position to the first position. It is configured.

  Therefore, when the movable part 3 moves from the second position to the first position, the first switch SW1 is turned on and the second switch SW2 is turned off, and the positive current generated from the coil 21 is supplied to the first diode D1 and the first diode D1. It flows through one switch SW1. When the movable part 3 moves from the first position to the second position, the second switch SW2 is turned on, the first switch SW1 is turned off, and the negative current generated from the coil 21 is supplied to the second diode D2 and the second diode D2. It flows through two switches SW2.

  As described above, the power generation device 1 according to the present embodiment includes the movable portion 3, the coil 21, and the rectifier circuit 4. The movable part 3 moves between the first position and the second position. The coil 21 generates a first current that flows in the first current direction when the movable part 3 moves from the second position to the first position, and the movable part 3 moves from the first position to the second position. The second current flowing in the second current direction opposite to the first current direction is generated. The rectifier circuit 4 receives the first current and the second current from the coil 21 and outputs an output current flowing in a predetermined direction. The rectifier circuit 4 is turned on when the movable part 3 moves from the second position to the first position, and is turned off when the movable part 3 moves from the first position to the second position (first switch). 1 switch SW1).

  In the power generator 1 of this embodiment, the voltage drop due to the forward voltage of the diode is reduced as compared with the case where the rectifier circuit 4 is configured by a bridge circuit of four diodes. Thereby, in the electric power generating apparatus 1 of this embodiment, the electric power loss by the rectifier circuit 4 can be reduced and the electric power supplied to load can be increased.

  The power generation device 1 according to the present embodiment is applicable to an input device 10 as shown in FIG. The input device 10 according to the present embodiment includes a power generation device 1, an input unit 6, and a communication unit 7. The input unit 6 is configured to move the movable unit 3. The communication unit 7 is electrically connected between the output terminals P21 and P22 of the rectifier circuit 4 and configured to transmit a radio signal.

  Thereby, in the input device 10, the movable unit 3 moves in accordance with the operation (movement) of the input unit 6, the power generated by the coil 21 is supplied to the communication unit 7, and a radio signal is transmitted from the communication unit 7. Can do. Therefore, the input device 10 does not require power supply from a battery, a battery, a commercial power source, or the like.

(2) Configuration (2.1) Power Generation Device First, the configuration of the power generation device 1 will be described in detail with reference to FIGS.

  The power generation device 1 includes a power generation unit 2, a movable unit 3, and a rectifier circuit 4. Moreover, the electric power generating apparatus 1 is further provided with the fixing | fixed part 5 (refer FIG. 2, FIG. 3), the output side capacitor | condenser C1 (refer FIG. 1), and the input side capacitor | condenser C2 (refer FIG. 1).

  As shown in FIGS. 2 and 3, the power generation unit 2 includes a coil 21 and a fixed yoke 22.

  The coil 21 is composed of a conductive wire wound around, for example, a synthetic resin coil bobbin. The fixed yoke 22 is made of a magnetic material such as silicon steel. The fixed yoke 22 is formed in a rod shape having a second direction S2 (vertical direction in FIGS. 2 and 3) perpendicular to the first direction S1 as a longitudinal direction, and is provided so as to penetrate the coil bobbin. The fixed yoke 22 has a pair of flange portions 221a and 221b at both ends in the second direction S2. One end of the coil 21 is electrically connected to the first input terminal P11 of the rectifier circuit 4, and the other end is electrically connected to the second input terminal P12 of the rectifier circuit 4. The coil 21 and the fixed yoke 22 are fixed to a fixing member such as a housing. Note that the coil bobbin is not essential, and the coil 21 may be constituted by a conducting wire wound around the fixed yoke 22.

  The movable part 3 is configured to be able to reciprocate (along) in the first direction S1. The movable part 3 has a first movable element 31 and a second movable element 32 arranged on both sides of the coil 21 in the first direction S1. The first mover 31 is disposed on one side of the first direction S1 with respect to the coil 21 (left side in FIGS. 2 and 3), and the second mover 32 is on the other side of the first direction S1 with respect to the coil 21. It is arranged on the side (right side in FIGS. 2 and 3). The 1st needle | mover 31 and the 2nd needle | mover 32 are provided in the movable member which can slide with respect to fixed members, such as a housing | casing, for example. Therefore, when the movable member moves, the first movable element 31 and the second movable element 32 move. The movable member is configured to move by an operation (movement) of the input unit 6 (see FIG. 1). That is, the movable part 3 (the first movable element 31 and the second movable element 32) moves in the first direction S1 in accordance with the operation (movement) of the input unit 6. Note that the movable member and the input unit 6 are both movable with respect to the fixed member (housing), but the movable member and the input unit 6 are separate members independent of each other and can be moved individually. .

  The first movable element 31 includes a first magnet 311 and a pair of first movable yokes 312a and 312b. The first magnet 311 is a permanent magnet and is formed in a rectangular shape. The pair of first movable yokes 312 a and 312 b are disposed on both sides in the second direction S <b> 2 with respect to the first magnet 311. The pair of first movable yokes 312a and 312b are made of a magnetic material such as silicon steel, and are formed in a rod shape having the second direction S2 as a longitudinal direction. The pair of first movable yokes 312a and 312b have end faces in the second direction S2 joined to the first magnet 311 and are magnetically coupled to the first magnet 311. The first magnet 311 is bonded to the first movable yoke 312a on one side (upper side in FIGS. 2 and 3) with the N pole, and on the other side (lower side in FIGS. 2 and 3). The magnetic polarity is set so that the surface becomes the south pole. Accordingly, one first movable yoke 312a has an N pole, and the other first movable yoke 312b has an S pole. The description of “N” and “S” of the first magnet 311 described in FIG. 2 and FIG. 3 is a description for showing the magnetic pole property of the first magnet 311 and does not accompany the actual situation.

  The second movable element 32 includes a second magnet 321 and a pair of second movable yokes 322a and 322b. The second magnet 321 is a permanent magnet and is formed in a rectangular shape. The pair of second movable yokes 322 a and 322 b are disposed on both sides in the second direction S <b> 2 with respect to the second magnet 321. The pair of second movable yokes 322a and 322b are made of a magnetic material such as silicon steel, for example, and are formed in a rod shape having the second direction S2 as a longitudinal direction. The pair of second movable yokes 322a and 322b have end faces in the second direction S2 joined to the second magnet 321 and are magnetically coupled to the second magnet 321. The second magnet 321 is joined to the second movable yoke 322b on one side (the upper side in FIGS. 2 and 3) with the second movable yoke 322a and on the other side (the lower side in FIGS. 2 and 3). The magnetic polarity is set so that the surface becomes the N pole. Accordingly, one second movable yoke 322a has an S pole, and the other second movable yoke 322b has an N pole. The description of “N” and “S” of the second magnet 321 shown in FIGS. 2 and 3 is a description for showing the magnetic pole property of the second magnet 321 and does not involve the actual situation.

  When the first mover 31 (first magnet 311) and the second mover 32 (second magnet 321) move with respect to the coil 21, the magnetic flux passing through the coil 21 changes, and the coil 21 generates current. Let The first magnet 311 and the second magnet 321 are arranged so that the magnetic polarities with respect to the coil 21 are opposite to each other. Therefore, the direction of the magnetic flux passing through the coil 21 is reversed when the first magnet 311 approaches the coil 21 (see FIG. 2) and when the second magnet 321 approaches the coil 21 (see FIG. 3). . That is, the movable part 3 includes magnets (first magnet 311 and second magnet 321) that generate magnetic flux that passes through the coil 21. The direction of the magnetic flux passing through the coil 21 when the movable part 3 is at the first position is opposite to the direction of the magnetic flux passing through the coil 21 when the movable part 3 is at the second position.

  Thereby, the polarity of the current generated by the coil 21 by electromagnetic induction is reversed according to the direction in which the movable part 3 moves between the first position and the second position. In this embodiment, when the movable part 3 moves from the second position (see FIG. 3) to the first position (see FIG. 2), the polarity of the current (first current) generated by the coil 21 is “positive”. To do. In this case, the polarity of the output voltage of the coil 21, in other words, the potential of the input terminal P11 with respect to the potential of the input terminal P12 of the rectifier circuit 4 is “positive”. Further, when the movable part 3 moves from the first position (see FIG. 2) to the second position (see FIG. 3), the polarity of the current (second current) generated by the coil 21 is “negative”. In this case, the polarity of the output voltage of the coil 21, in other words, the potential of the input terminal P11 with respect to the potential of the input terminal P12 of the rectifier circuit 4 is “negative”.

  In other words, when the movable part 3 moves from the second position to the first position, a first current (positive current) flowing in the first current direction is generated in the coil 21. Further, when the movable portion 3 moves from the first position to the second position, a second current (negative current) flowing in the second current direction is generated in the coil 21. Here, the second current direction is opposite to the first current direction.

  The fixing part 5 is fixed to a fixing member such as a housing. The fixed part 5 has a first auxiliary yoke 51 and a second auxiliary yoke 52 arranged on both sides in the first direction S1 with respect to the movable part 3 (the first movable element 31 and the second movable element 32). .

  The first auxiliary yoke 51 is disposed on one side (the left side in FIGS. 2 and 3) in the first direction S <b> 1 with respect to the first mover 31. In other words, the 1st needle | mover 31 is arrange | positioned between the 1st auxiliary | assistant yoke 51 and the electric power generation part 2 (coil 21), and moves to 1st direction S1. The first auxiliary yoke 51 is made of a magnetic material such as silicon steel, for example. The first auxiliary yoke 51 is formed in a U shape having a rectangular first recess 510 on the surface on the first movable element 31 side in the first direction S1. The first auxiliary yoke 51 has a pair of rod-shaped first main portions 511 having the second direction S2 as a longitudinal direction, and a pair of first main portions 511 projecting from both ends of the second direction S2 toward the first mover 31. 1st protrusion 512.

  The second auxiliary yoke 52 is disposed on the other side (the right side in FIGS. 2 and 3) in the first direction S <b> 1 with respect to the second mover 32. In other words, the 2nd needle | mover 32 is arrange | positioned between the 2nd auxiliary yoke 52 and the electric power generation part 2 (coil 21), and moves to 1st direction S1. The second auxiliary yoke 52 is made of a magnetic material such as a silicon steel plate. The second auxiliary yoke 52 is formed in a U shape having a rectangular second recess 520 on the surface on the second mover 32 side in the first direction S1. The second auxiliary yoke 52 includes a pair of rod-shaped second main portions 521 whose longitudinal direction is the second direction S2 and a pair of protrusions that project toward the second mover 32 from both ends of the second main portion 521 in the second direction S2. A second protrusion 522.

  As shown in FIG. 1, the rectifier circuit 4 has a bridge circuit of a first diode D1, a second diode D2, a first switch SW1, and a second switch SW2, and the coil 21 is generated. Full-wave rectification of current. In other words, the rectifier circuit 4 is a bridge circuit having a first current path and a second current path. The first current path includes the first diode D1 and the first switch SW1, and the first current (positive current) from the coil 21 and the output current of the rectifier circuit 4 flow therethrough. The second current path includes the second diode and the second switch SW2, and the second current (negative current) from the coil 21 and the output current of the rectifier circuit 4 flow therethrough. That is, when a first current flows through the first diode D1, an output current flows through the first switch SW1. When the second current flows through the second diode D2, the output current flows through the second switch SW2.

  Specifically, the power generation unit 2 (coil 21) is electrically connected between the pair of input terminals P11 and P12 in the rectifier circuit 4. The rectifier circuit 4 includes a series circuit of a first diode D1 and a second diode D2, and a series circuit of a first switch SW1 and a second switch SW2 between the first input terminal P11 and the second input terminal P12. Are connected in parallel. The first diode D1 has an anode electrically connected to the input terminal P11. The anode of the second diode D2 is electrically connected to the input terminal P12. The connection point between the cathode of the first diode D1 and the cathode of the second diode D2 is the output terminal P21 on the positive side of the rectifier circuit 4. Further, one end of the first switch SW1 is electrically connected to the input terminal P12. One end of the second switch SW2 is electrically connected to the input terminal P11. A connection point between the first switch SW1 and the second switch SW2 is an output terminal P22 on the negative side of the rectifier circuit 4.

  The first switch SW1 and the second switch SW2 are configured so that the on / off state is switched by the movement of the movable portion 3. As shown in FIGS. 2 and 3, the first switch SW <b> 1 and the second switch SW <b> 2 are provided in the fixed portion 5.

  Specifically, the first switch SW <b> 1 is provided in the second recess 520 of the second auxiliary yoke 52. The first switch SW1 is a momentary pushbutton switch (tactile switch) having a first actuator 41 as an operation unit. The first switch SW1 is configured to be turned on only while the first actuator 41 is being pressed.

  The first actuator 41 is driven by the movement of the second movable element 32 in the movable part 3. Specifically, the first actuator 41 protrudes toward the second movable element 32 from the pair of second protrusions 522 of the second auxiliary yoke 52 in a state where no force is received (see FIG. 3). At this time, the first switch SW1 is in an off state. When the movable portion 3 (second movable element 32) moves from the second position (see FIG. 3) to the first position (see FIG. 2), the first actuator 41 is pushed by the second movable element 32. As a result, the first switch SW1 is turned on.

  The second switch SW2 is provided in the first recess 510 of the first auxiliary yoke 51. The second switch SW2 is a momentary pushbutton switch (tactile switch) having the second actuator 42 as an operation unit. The second switch SW2 is configured to be turned on only while the second actuator 42 is being pressed.

  The second actuator 42 is driven by the movement of the first mover 31 in the movable part 3. Specifically, the second actuator 42 protrudes further toward the first mover 31 than the pair of first protrusions 512 of the first auxiliary yoke 51 in a state where no force is received (see FIG. 2). At this time, the second switch SW2 is in an off state. When the movable portion 3 (first movable element 31) moves from the first position (see FIG. 2) to the second position (see FIG. 3), the second actuator 42 is pushed by the first movable element 31. As a result, the second switch SW2 is turned on.

  As shown in FIG. 1, the output-side capacitor C <b> 1 is electrically connected between the pair of output terminals P <b> 21 and P <b> 22 of the rectifier circuit 4. The output-side capacitor C1 can store the power generated by the power generation unit 2, and can stabilize the voltage applied to the communication unit 7 that is a load.

  The input-side capacitor C2 is electrically connected between the pair of input terminals P11 and P12 of the rectifier circuit 4. When both the first switch SW1 and the second switch SW2 are turned off by the input side capacitor C2, the power generated by the power generation unit 2 is stored, and the first switch SW1 or the second switch SW2 is turned on. It can be supplied to the communication unit 7 which is a load. The capacity of the input side capacitor C2 is smaller than the capacity of the output side capacitor C1. In the present embodiment, as an example, the capacitance of the output side capacitor C1 is 22 μF, and the capacitance of the input side capacitor C2 is 1.2 μF. The effect of the input side capacitor C2 will be described in detail in the section of “(3) Operation example” described later.

(2.2) Input Device As shown in FIG. 1, the input device 10 according to the present embodiment includes a power generation device 1, an input unit 6, and a communication unit 7. The input device 10 is configured to transmit a radio signal from the communication unit 7 using the power generation device 1 as a power source. As an example, the input device 10 is used as a crescent sensor that detects locking / unlocking of a crescent lock.

  The input unit 6 moves the movable unit 3 according to the operation of the crescent lock. That is, the input unit 6 moves the movable unit 3 between the first position and the second position depending on whether the crescent lock is in the locked state or the unlocked state. As an example, in this embodiment, the locked state of the crescent lock corresponds to the first position of the movable portion 3 (see FIG. 2), and the unlocked state of the crescent lock and the second position of the movable portion 3 (see FIG. 3). And correspond to each other. Therefore, the input unit 6 positions the movable part 3 in the first position when the crescent lock is in the locked state, and positions the movable part 3 in the second position when the crescent lock is in the unlocked state. When the crescent lock is changed from the locked state to the unlocked state by the user's operation, the input unit 6 moves the movable unit 3 from the first position to the second position. When the crescent lock is changed from the unlocked state to the locked state by the user's operation, the input unit 6 moves the movable unit 3 from the second position to the first position. The crescent lock and the input unit 6 are separate members independent of each other and can be moved individually.

  The communication unit 7 is electrically connected between the output terminals P21 and P22 of the rectifier circuit 4 (between both ends of the output side capacitor C1), and operates by receiving the power generated by the power generation unit 2 (coil 21). The communication unit 7 is a wireless communication module having a signal processing circuit and the like, and transmits a wireless signal from an antenna provided in the input device 10 to the receiving device. The communication method of the communication unit 7 is, for example, Wi-Fi (registered trademark), Bluetooth (registered trademark), specific low power radio, or the like. The specific low-power radio is a low-power radio that does not require a license and registration. For example, in Japan, the specific low-power radio is a low-power radio that uses radio waves in a 420 MHz band or a 920 MHz band.

  The communication unit 7 generates detection information corresponding to the operation (movement) of the input unit 6 and transmits a radio signal including the detection information to the receiving device. That is, the detection information changes according to the direction in which the movable unit 3 moves between the first position and the second position.

  The input device 10 of the present embodiment is attached to a window frame that is an attachment target so that the input unit 6 is indirectly operated (moved) by a crescent lock. When the crescent lock is operated by the user, the input unit 6 moves the movable unit 3. As the movable part 3 moves, the coil 21 generates power. The communication unit 7 receives the power generated by the coil 21, generates detection information corresponding to the direction in which the movable unit 3 has moved, and transmits a wireless signal including the detection information to the receiving device. Therefore, the receiving device can monitor whether the crescent lock is in the locked state or the unlocked state based on the detection information included in the radio signal from the input device 10.

(3) Operation example Below, the operation example of the electric power generating apparatus 1 of this embodiment is demonstrated. Here, operation | movement of the electric power generating apparatus 1 in case the movable part 3 moves to a 2nd position (refer FIG. 3) from a 1st position (refer FIG. 2) is demonstrated. Since the operation when the movable part 3 moves from the second position to the first position is the same as the operation when the movable part 3 moves from the first position to the second position, detailed description thereof is omitted.

  As shown in FIG. 3, when the movable part 3 is in the second position, the first mover 31 is close to the first auxiliary yoke 51, and the second mover 32 is close to the power generation part 2.

  At this time, a magnetic path through which the magnetic flux generated from the first magnet 311 passes is formed in the pair of first movable yokes 312a and 312b and the first auxiliary yoke 51, and the pair of first movable yokes 312a and 312b and the first auxiliary yoke 51 is magnetically coupled. Thereby, the adsorption | suction force which hold | maintains the 1st needle | mover 31 in a 2nd position generate | occur | produces. Further, the magnetic flux generated from the first magnet 311 of the first mover 31 at the second position is suppressed from passing through the coil 21. That is, the leakage magnetic flux of the first magnet 311 in the second position is suppressed. When the first movable element 31 is in the second position, the pair of first movable yokes 312a and 312b and the first auxiliary yoke 51 may be in contact with each other or may be separated from each other.

  Further, when the first movable element 31 approaches the first auxiliary yoke 51, the second actuator 42 of the second switch SW <b> 2 provided in the first auxiliary yoke 51 is pushed by the first movable element 31. As a result, the second switch SW2 is turned on, and the input terminal P11 and the output terminal P22 of the rectifier circuit 4 are conducted.

  Further, a magnetic path through which the magnetic flux generated from the second magnet 321 passes is formed in the pair of second movable yokes 322a and 322b and the fixed yoke 22, and the pair of second movable yoke 322 and the fixed yoke 22 are magnetically coupled. Is done. Thereby, the adsorption | suction force which hold | maintains the 2nd needle | mover 32 in a 2nd position generate | occur | produces.

  The magnetic polarity of the second magnet 321 is such that the joint surface with the second movable yoke 322a on one side (upper side in FIG. 3) is the S pole, and the joint surface with the second movable yoke 322b on the other side (lower side in FIG. 3) is N. It is set to be a pole. Therefore, the direction of the magnetic flux passing through the coil 21 is the direction (upward in FIG. 3) from the other (lower in FIG. 3) flange 221b of the fixed yoke 22 to the one (upper in FIG. 3) flange 221a. . In FIG. 3, the direction of the magnetic flux passing through the coil 21 is conceptually described by arrows.

  When the second movable element 32 is in the second position, it is separated from the second auxiliary yoke 52. Thereby, the first switch SW1 provided in the second auxiliary yoke 52 is turned off, and the input terminal P12 and the output terminal P22 of the rectifier circuit 4 are disconnected.

  When the movable part 3 moves from the second position (see FIG. 3) to the first position (see FIG. 2), the first movable element 31 approaches the power generation part 2, and the second movable element 32 moves from the power generation part 2. Leave.

  At this time, a magnetic path through which the magnetic flux generated from the first magnet 311 passes is formed in the pair of first movable yokes 312 a and 312 b and the fixed yoke 22. Thereby, the magnetic flux generated from the first magnet 311 passes through the coil 21. The magnetic polarity of the first magnet 311 is such that the joint surface with one (upper side in FIG. 2) of the first movable yoke 312a is the N pole and the joint surface with the other (lower side in FIG. 2) the second movable yoke 322b. It is set to be the S pole. Therefore, the direction of the magnetic flux passing through the coil 21 is the direction (downward in FIG. 2) from one of the fixed yokes 22 (upper side in FIG. 2) toward the other (lower side in FIG. 2) flange 221b. . In FIG. 2, the direction of the magnetic flux passing through the coil 21 is conceptually indicated by arrows. That is, when the movable part 3 moves from the second position to the first position, the direction of the magnetic flux passing through the coil 21 is reversed. As a result, an induced current flows through the coil 21. That is, the coil 21 generates power by electromagnetic induction. At this time, the polarity of the voltage V1 generated between both ends of the coil 21 is “positive”.

  Further, the first mover 31 moves away from the first auxiliary yoke 51 by moving from the second position to the first position. As a result, the second switch SW2 provided in the first auxiliary yoke 51 is turned off, and the input terminal P11 and the output terminal P22 of the rectifier circuit 4 are shut off. Further, when the second movable element 32 moves from the second position to the second position, the first actuator 41 of the first switch SW <b> 1 provided in the second auxiliary yoke 52 is pushed by the second movable element 32. Thereby, the first switch SW1 is turned on, and the input terminal P12 and the output terminal P22 of the rectifier circuit 4 are electrically connected.

  Therefore, the current generated from the coil 21 flows through the first diode D1 and the first switch SW1. Specifically, the current generated from the coil 21 flows through the path of the first diode D1 → the output side capacitor C1 and the communication unit 7 → the first switch SW1. That is, the current generated by the coil 21 flows through the first current path including the first diode D1 and the first switch SW1 in the bridge circuit included in the rectifier circuit 4.

  Here, the power generation device of the comparative example will be described. In the power generator of the comparative example, the rectifier circuit is configured by a bridge circuit having four diodes. Therefore, in the power generation device of the comparative example, the current generated from the coil flows through the two diodes in the rectifier circuit, and thus a voltage drop occurs in each of the two diodes. Therefore, the voltage between the output terminals of the rectifier circuit is a voltage that is lowered by the forward voltage of each of the two diodes from the voltage between the input terminals of the rectifier circuit. Thereby, in the power generation device of the comparative example, power loss is generated by the two diodes in the rectifier circuit.

  On the other hand, in the power generation device 1 of the present embodiment, as described above, there is only one diode through which the current generated from the coil 21 flows. Therefore, the power loss generated in the rectifier circuit 4 is the power generated by one diode. Only loss. Here, the voltage drop at the switches (the first switch SW1 and the second switch SW2) is sufficiently smaller than the voltage drop due to the forward voltage of the diode, and is ignored. Therefore, the voltage between the output terminals P21 and P22 of the rectifier circuit 4 is a voltage that is lower than the voltage between the input terminals P11 and P12 of the rectifier circuit 4 by the forward voltage of one diode. Thereby, in the electric power generating apparatus 1 of this embodiment, the electric power loss in the rectifier circuit 4 is reduced compared with the electric power generating apparatus of a comparative example.

  For example, when the power generated by the power generation unit 2 (coil 21) is 300 μJ, the power loss of the rectifier circuit is about 16.8% in the power generation device of the comparative example, whereas the power generation device of the present embodiment 1, the power loss in the rectifier circuit 4 is about 9.0%. Further, when the power generated by the power generation unit 2 (coil 21) is 200 μJ, the power loss of the rectifier circuit is about 19.5% in the power generation device of the comparative example, whereas the power generation device of the present embodiment is 1, the power loss in the rectifier circuit 4 is about 10.5%. In addition, when the power generated by the power generation unit 2 (coil 21) is 150 μJ, the power loss of the rectifier circuit in the power generation device of the comparative example is about 21.6%, whereas the power generation device of the present embodiment 1, the power loss in the rectifier circuit 4 is about 11.8%. Thus, since the ratio of the power loss in the rectifier circuit 4 increases as the generated power in the power generation unit 2 (coil 21) decreases, the power generation device 1 of the present embodiment that can reduce the power loss is more effective. Become useful.

  Further, as described above, when the movable portion 3 is in the second position, the pair of first movable yokes 312a and 312b and the first auxiliary yoke 51 are magnetically coupled, and the first movable element 31 is moved to the second position. The adsorption force that is held on the surface is generated. Further, when the movable portion 3 is in the second position, the pair of second movable yokes 322a and 322b and the fixed yoke 22 are magnetically coupled to generate an attractive force that holds the second movable element 32 in the second position. To do. When the movable portion 3 moves from the second position to the first position, the pair of first movable yokes 312a and 312 and the fixed yoke 22 are magnetically coupled to hold the first movable element 31 at the first position. Adsorption force is generated. In addition, the pair of second movable yokes 322a and 322b and the second auxiliary yoke 52 are magnetically coupled to generate an attractive force that holds the second movable element 32 in the first position.

  That is, in order for the movable part 3 to move from the second position, the attractive force between the pair of first movable yokes 312a and 312b and the first auxiliary yoke 51 and the pair of second movable yokes 322a and 322b are fixed. It is necessary to apply a force exceeding the adsorption force between the yoke 22 to the movable portion 3. Therefore, since the movable part 3 starts moving when a predetermined force or more is applied to the movable part 3, the movable part 3 can be moved at high speed.

  Further, when the movable part 3 moves toward the first position, the pair of first movable yokes 312a and 312b and the fixed yoke 22 and the pair of second movable yokes 322a and 322b and the second auxiliary yoke 52 are moved. Adsorption force is generated between them. Thereby, the movable part 3 can be moved faster toward the first position.

  Therefore, in the power generator 1 of the present embodiment, the movable part 3 can be moved at high speed, and a stable power generation amount can be obtained in the coil 21.

  Next, the power generation start of the power generation unit 2 (coil 21) and the on / off sequence of the switches (first switch SW1, second switch SW2) will be described.

  Strictly speaking, when the movable part 3 moves from the second position to the first position, the timing at which the coil 21 starts power generation, the timing at which the first switch SW1 is turned on, and the timing at which the second switch SW2 is turned off are strictly the same. Instead, there is a time difference.

  In the power generation device 1 according to the present embodiment, when the movable portion 3 (the first movable element 31 and the second movable element 32) starts moving from the second position, the magnetic flux passing through the coil 21 changes. To start. Next, when the first movable element 31 moves away from the first auxiliary yoke 51, the second switch SW2 provided in the first auxiliary yoke 51 is turned off. At this time, both the first switch SW1 and the second switch SW2 are turned off. When the second movable element 32 approaches the second auxiliary yoke 52, the first switch SW1 provided in the second auxiliary yoke 52 is turned on. That is, in the power generation device 1 of the present embodiment, the on state and the off state of the first switch SW1 and the second switch SW2 are switched after the coil 21 starts power generation.

  The electric power generated by the power generation unit 2 (coil 21) is between the input terminals P11 and P12 of the rectifier circuit 4 during the period from when the movable unit 3 starts moving from the second position to when the first switch SW1 is turned on. Is stored in the input-side capacitor C2 electrically connected to. When the first switch SW1 is turned on, the power generated by the coil 21 and the power stored in the input side capacitor C2 are supplied to the output side capacitor C1 and the energization unit.

  Here, since the first switch SW1 is a mechanical switch, there is a possibility that chattering may occur when the first switch SW1 is turned on. In FIG. 4, when chattering occurs when the first switch SW1 is turned on, the output voltage of the power generation unit 2 (the voltage across the coil 21) V1, the voltage Vc1 across the output side capacitor C1, and the input side capacitor C2 An example of the waveform diagram of the both-ends voltage Vc2 is shown.

  At time t0, the power generation unit 2 (coil 21) starts generating power, and the output voltage V1 of the power generation unit 2 and the voltage Vc2 across the input side capacitor C2 rise. At this time, since the first switch SW1 is in the OFF state, the voltage Vc1 across the output side capacitor C1 does not increase. At this time, the second switch SW2 is in the ON state, but backflow is prevented by the second diode D2.

  Between time t0 and time t1, the second switch SW2 is turned off, and at time t1, the first switch SW1 is turned on. As a result, the voltage Vc1 across the output side capacitor C1 increases.

  Then, due to chattering, the first switch SW1 is temporarily turned off at time t2, and the first switch SW1 is turned on again at time t3. In the period T1 from time t2 to time t3, the first switch SW1 is turned off, so that the rise of the voltage Vc1 across the output side capacitor C1 stops. Since power is supplied from the power generation unit 2 to the input-side capacitor C2, the voltage Vc2 across the input-side capacitor C2 increases. That is, the electric power generated by the power generation unit 2 during the period T1 when the first switch SW1 is turned off due to chattering is stored in the input-side capacitor C2.

  At time t3, when the first switch SW1 is turned on, the power generated by the power generation unit 2 and the power stored in the input side capacitor C2 are supplied to the output side capacitor C1, and the both-end voltage Vc1 increases.

  As described above, the power generation device 1 according to the present embodiment includes the input-side capacitor C2 that is electrically connected between the input terminals P11 and P12 of the rectifier circuit 4. The input-side capacitor C2 can temporarily store the power generated by the coil 21 during the period when the first switch SW1 is off due to chattering or the like, and supply it to the output-side capacitor C1 and the communication unit 7 that is a load. Therefore, in the power generation device 1 of the present embodiment, power loss due to chattering can be reduced as compared with the case where the input-side capacitor C2 is not provided.

  Here, since the power loss occurs also in the input side capacitor C2, it is desirable that the capacity of the input side capacitor C2 is 1/10 or less of the capacity of the output side capacitor C1. FIG. 5 shows a graph of the output power of the power generator 1 with respect to the capacity of the input side capacitor C2. Here, it is assumed that the capacitance of the output side capacitor C1 is 22 μF.

  As shown in FIG. 5, when the capacitance of the input side capacitor C2 is 0, that is, when the input side capacitor C2 is not provided, the output power of the power generator 1 is W0. When the capacitance of the input side capacitor C2 is between 0 and c20, the output power of the power generator 1 exceeds W0. When the capacitance of the input side capacitor C2 is c21, the output power is W1, which is the highest. When the capacitance of the input side capacitor C2 becomes larger than c20, the output power of the power generator 1 becomes lower than W0 due to power loss in the input side capacitor C2. Therefore, the capacitance of the input side capacitor C2 is preferably larger than 0 and smaller than c20. In the present embodiment, the capacitance of the input side capacitor C2 is 1.2 μF, which is smaller than c20. Thereby, power loss due to chattering is reduced. The graph shown in FIG. 5 is a simulation result on the condition of chattering shown in FIG. 4, and the optimum capacitance of the input side capacitor C2 varies depending on the switch off time, the number of times of off, etc. due to chattering.

  Although the case where the movable part 3 moves from the second position to the first position has been described above, the same applies to the case where the movable part 3 moves from the first position to the second position. When the movable part 3 moves from the first position to the second position, the polarity of the current (voltage) generated by the coil 21 is opposite to the above, and the on / off of the first switch SW1 and the second switch SW2 is as described above. Vice versa. That is, when the movable part 3 moves from the first position to the second position, the current generated from the coil 21 flows through the second diode D2 and the second switch SW2. Specifically, the current generated from the coil 21 flows through the path of the second diode D2 → the output side capacitor C1 and the communication unit 7 → the second switch SW2. That is, the current generated by the coil 21 flows through the second current path including the second diode D2 and the second switch SW2 in the bridge circuit included in the rectifier circuit 4.

(4) Modified Examples Hereinafter, modified examples of the power generation device 1 and the input device 10 will be described.

(4.1) First Modification A first modification of the power generator 1 will be described with reference to FIG.

  In the above-described example, the first switch SW1 and the second switch SW2 are configured by pushbutton switches, but are not limited thereto. The power generation device 1 of the present modification has a c-contact type slide switch SW3. The slide switch SW3 has a pair of movable contacts (first movable contact 431, second movable contact 432) and three fixed contacts (first fixed contact 441, second fixed contact 442, common fixed contact 440). In this modification, the first movable contact 431, the first fixed contact 441, and the common fixed contact 440 correspond to the first switch SW1 (see FIG. 1), and the second movable contact 432, the second fixed contact 442, and the common The fixed contact 440 corresponds to the second switch SW2 (see FIG. 1).

  The pair of movable contacts (the first movable contact 431 and the second movable contact 432) are made of a conductive member and are provided in the movable portion 3. Specifically, the first movable contact 431 is provided on the first movable element 31 and moves with the movement of the first movable element 31. The second movable contact 432 is provided on the second movable element 32, and moves with the movement of the second movable element 32.

  The first fixed contact 441 is provided at a position where the first fixed contact 431 contacts and conducts with the first movable contact 431 regardless of whether the first movable contact 431 is in the first position or the second position. The first fixed contact 441 is electrically connected to the input terminal P12 (see FIG. 1) of the rectifier circuit 4.

  The second fixed contact 442 is provided at a position where the second movable contact 432 contacts and conducts with the second movable contact 432 regardless of whether the second movable contact 432 is in the first position or the second position. The second fixed contact 442 is electrically connected to the input terminal P11 (see FIG. 1) of the rectifier circuit 4.

  The common fixed contact 440 is provided between the first fixed contact 441 and the second fixed contact 442 in the first direction S1. The common fixed contact 440 is brought into contact with the first movable contact 431 when the movable part 3 is in the first position, and is brought into contact with the second movable contact 432 when the movable part 3 is in the second position. To do. The common fixed contact 440 is electrically connected to the output terminal P22 (see FIG. 1) of the rectifier circuit 4. In other words, the common fixed contact 440 comes into contact with the first movable contact 431 when the movable part 3 moves from the second position to the first position, and the movable part 3 moves from the first position to the second position. The first movable contact 431 is separated. Further, the common fixed contact 440 comes into contact with the second movable contact 432 when the movable part 3 moves from the first position to the second position, and the common fixed contact 440 moves as the movable part 3 moves from the second position to the first position. 2 Move away from the movable contact 432.

  With the above configuration, in the power generation device 1 of the present modification, the contact state of the slide switch SW3 is changed by the movable unit 3 moving between the first position and the second position. When the movable part 3 is in the first position, the first fixed contact 441 and the common fixed contact 440 are conducted through the first movable contact 431, and the current generated by the coil 21 flows. Further, when the movable part 3 is in the second position, the second fixed contact 442 and the common fixed contact 440 are brought into conduction through the second movable contact 432, and the current generated by the coil 21 flows.

  The slide switch SW3 shown in FIG. 6 is a conceptual diagram, and includes a pair of movable contacts (first movable contact 431, second movable contact 432) and three fixed contacts (first fixed contact 441, second fixed contact). The shapes of the contact 442 and the common fixed contact 440) are not limited to those shown in FIG. Further, the positions at which the pair of movable contacts (first movable contact 431, second movable contact 432) and three fixed contacts (first fixed contact 441, second fixed contact 442, common fixed contact 440) are provided are shown in the figure. The position is not limited to 6 and can be adjusted as appropriate. For example, the pair of movable contacts (first movable contact 431, second movable contact 432) may be provided on a movable member provided with the movable portion 3 (first movable element 31, second movable element 32). Moreover, the number of movable contacts may be one. In this case, the movable contact conducts between the first fixed contact 441 and the common fixed contact 440 or conducts the second fixed contact 442 and the common fixed contact 440 according to the position of the movable part 3.

(4.2) Other Modified Examples Other modified examples of the power generation device 1 and the input device 10 are listed below.

  In the example described above, the first switch SW1 and the second switch SW2 are configured to be turned on only while the first actuator 41 and the second actuator 42 are being pressed. However, the present invention is not limited to this. The first switch SW1 and the second switch SW2 may be configured to be turned off only while the first actuator 41 and the second actuator 42 are being pressed. In this case, the position where the first switch SW1 and the second switch SW2 are provided is opposite to the above. That is, the first switch SW1 is provided in the first recess 510 of the first auxiliary yoke 51, and the second switch SW2 is provided in the second recess 520 of the second auxiliary yoke 52.

  Further, the first switch SW1 and the second switch SW2 are not limited to pushbutton switches, and for example, the first actuator 41 and the second actuator 42 may be configured by levers.

  Further, the first switch SW1 and the second switch SW2 may be pressure sensors whose resistance values change according to the pressing force. The pressure sensor is configured such that when the pressing force increases, the resistance value decreases, and when the pressing force decreases, the resistance value increases. Therefore, when the first switch SW1 is configured by a pressure sensor, the resistance value decreases when the pressing force increases due to the movement of the movable portion 3 from the second position to the first position, and from the first position to the second position. When the pressing force decreases due to the movement of the movable part 3, the resistance value increases. Further, when the second switch SW2 is configured by a pressure sensor, the resistance value decreases when the pressing force increases as the movable portion 3 moves from the first position to the second position, and the second position switches from the second position to the first position. When the pressing force decreases due to the movement of the movable part 3, the resistance value increases.

  Here, the pressure sensor is preferably configured to change the resistance value in proportion to the pressing force. Moreover, it is preferable that the resistance value of the pressure sensor in a state where no pressing force is applied is so large that the circuit can be regarded as being electrically insulated. That is, when the first switch SW1 is configured by a pressure sensor, the pressing force applied by the movement of the movable portion 3 from the first position to the second position is removed, and the resistance value is increased, which is regarded as an off state. . Further, when the second switch SW2 is constituted by a pressure sensor, the pressing force applied by the movement of the movable part 3 from the second position to the first position is removed, and the resistance value is increased to be regarded as an off state. .

  By configuring the first switch SW1 and the second switch SW2 with pressure sensors, the amount of pushing for turning on the first switch SW1 and the second switch SW2 is reduced, and the power generator 1 can be downsized. it can.

  Further, the first switch SW1 and the second switch SW2 may be configured by membrane switches. In this case, the amount of pushing for turning on the first switch SW1 and the second switch SW2 is reduced, and the power generator 1 can be downsized.

  Further, the first switch SW1 and the second switch SW2 may be push switches.

  Further, the first switch SW1 and the second switch SW2 may be constituted by reed switches. In this case, for example, the first switch SW1 is configured to be turned on by the magnetic flux generated by the second magnet 321 when the second mover 32 is in the first position. The second switch SW2 is configured to be turned on by the magnetic flux generated by the first magnet 311 when the first mover 31 is in the second position.

  Further, the first switch SW1 and the second switch SW2 may be configured by a semiconductor switch such as a MOSFET (Metal Oxide Semiconductor Field Effect Transistor).

  In the example described above, as shown in FIGS. 2 and 3, the first switch SW1 is provided in the second auxiliary yoke 52 (fixed portion 5), and the second switch SW2 is provided in the first auxiliary yoke 51 (fixed portion 5). Although provided, the positions of the first switch SW1 and the second switch SW2 are not limited to the above. 1st switch SW1 may be provided in the 2nd needle | mover 32 (movable part 3). The second switch SW2 may be provided on the first movable element 31 (movable part 3). The first switch SW1 and the second switch SW2 may be provided in the power generation unit 2 or may be provided in a fixing member such as a housing.

  In the above-described example, when the movable part 3 moves, the on / off state of the switches (the first switch SW1 and the second switch SW2) is switched after the coil 21 starts power generation. Absent. When the movable part 3 moves, the on / off state of the switches (first switch SW1, second switch SW2) may be switched before the coil 21 starts power generation.

  In the example described above, the rectifier circuit 4 is configured to perform full-wave rectification on the current generated by the coil 21, but is not limited thereto, and is configured to perform half-wave rectification on the current generated by the coil 21. May be.

  In the example described above, the coil 21 is configured to generate power even when the movable part 3 moves in any direction in the first direction S1, but the movable part 3 is in one direction in the first direction S1. The coil 21 may be configured to generate power only when it is moved to.

  Moreover, in the example mentioned above, the movable part 3 which can move has a magnet (the 1st magnet 311 and the 2nd magnet 321), and the coil 21 is being fixed to fixing members, such as a housing | casing, However, it is not restricted to this. . Magnets (first magnet 311, second magnet 321) may be fixed to the fixed member, and the movable part 3 may have the coil 21. Even in this configuration, since the magnets (the first magnet 311 and the second magnet 321) move relative to the coil 21, the magnetic flux passing through the coil 21 is changed by the movement of the movable portion 3, and power can be generated.

  The power generation device 1 is not limited to the configuration used for the input device 10, and may be used as a single power generation device 1 or by being incorporated in equipment and equipment other than the input device 10. Further, the load of the power generation device 1 is not limited to the communication unit 7 and may be other electric loads.

  Further, the input device 10 is not limited to the configuration used for detecting the position of the mechanical component (crescent lock) like the above-described crescent sensor, but may be configured to be operated by a person as a switch for operating the device, for example. Good. In this case, the power generation device 1 may have a configuration in which the input unit 6 is directly operated by a person or a configuration in which the input unit 6 is indirectly operated by a person via an operation handle or the like. There may be.

  The communication method between the communication unit 7 and the receiving device is not limited to wireless communication using radio waves as a transmission medium, and may be, for example, optical wireless communication using light such as infrared rays as a medium.

(Summary)
The electric power generating apparatus (1) which concerns on a 1st aspect is provided with a movable part (3), a coil (21), and a rectifier circuit (4). The movable part (3) moves between the first position and the second position. The coil (21) generates a first current that flows in the first current direction when the movable part (3) moves from the second position to the first position, and the movable part (from the first position to the second position). When 3) moves, a second current that flows in a second current direction opposite to the first current direction is generated. The rectifier circuit (4) receives the first current and the second current from the coil (21) and outputs an output current flowing in a predetermined direction. The rectifier circuit (4) is turned on when the movable part (3) moves from the second position to the first position, and is turned off when the movable part (3) moves from the first position to the second position. It includes switches (first switch SW1, third switch SW3) that enter a state.

  According to this aspect, since the rectifier circuit (4) rectifies the current generated by the coil (21) using the switches (SW1, SW3), the rectifier is rectified compared to the configuration in which the current is rectified using only the diode. The power loss in the circuit (4) is reduced. Therefore, in the power generation device (1), power loss can be reduced.

  In the power generation device (1) according to the second aspect, in the first aspect, the switch (first switch SW1) has an actuator (first actuator 41) driven by the movement of the movable part (3).

  According to this aspect, since the actuator (41) is driven with the movement of the movable part (3), the switch (SW1) can be easily turned on and off according to the movement of the movable part (3). Can be switched.

  In the power generation device (1) according to the third aspect, in the first aspect, the switch (slide switch SW3) has a movable contact (first movable contact 431) and a fixed contact (common fixed contact 440). The movable contact (431) is provided on the movable part (3) and moves together with the movable part (3). The fixed contact (440) contacts the movable contact (431) by moving the movable part (3) from the second position to the first position, and the movable part (3) from the first position to the second position. It moves away from the movable contact (431) by moving.

  According to this aspect, since the movable contact (431) moves with the movement of the movable part (3), the switch (SW3) can be easily turned on and off according to the movement of the movable part (3). Can be switched.

  In the power generation device (1) according to the fourth aspect, in the first aspect, the switch (SW1) is a pressure sensor. The pressure sensor decreases the resistance value when the pressing force increases as the movable part (3) moves from the second position to the first position, and the movable part (3) moves from the first position to the second position. When the pressing force decreases, the resistance value increases.

  According to this aspect, the push-in amount for turning on the switch (SW1) is reduced, and the power generation device (1) can be downsized.

  In the power generation device (1) according to the fifth aspect, in the fourth aspect, the pressure sensor changes the resistance value in proportion to the pressing force.

  According to this aspect, the switch (SW1), which is a pressure sensor, can increase the resistance value when the movable part (3) moves from the second position to the first position, and can regard the circuit as an off state. .

  In the power generation device (1) according to the sixth aspect, in the first to fifth aspects, the movable part (3) is a magnet (a first magnet 311 and a second magnet 321) that generates a magnetic flux passing through the coil (21). including. The direction of the magnetic flux passing through the coil (21) when the movable part (3) is in the first position and the direction of the magnetic flux passing through the coil (21) when the movable part (3) is in the second position The opposite.

  According to this aspect, even when the movable part (3) moves in any direction between the first position and the second position, a current can be generated from the coil (21).

  In the power generation device (1) according to the seventh aspect, in any one of the first to sixth aspects, the rectifier circuit (4) is a bridge circuit having a first current path and a second current path. The first current path includes a switch (SW1), and the first current and the output current flow. A second current and an output current flow through the second current path.

  According to this aspect, the polarity of the output current supplied to the load can be made uniform.

  In the power generation device (1) according to the eighth aspect, in the seventh aspect, the first current path includes a first switch (SW1) that is a switch. The second current path is turned on when the movable part (3) moves from the first position to the second position, and is turned off when the movable part (3) moves from the second position to the first position. A second switch (SW2).

  According to this aspect, power loss in the rectifier circuit (4) can be reduced.

  In the power generation device (1) according to the ninth aspect, in the eighth aspect, the first current path further includes a first diode (D1) through which the first current flows. The second current path further includes a second diode (D2) through which the second current flows. When the first current flows through the first diode (D1), the output current flows through the first switch (SW1). When the second current flows through the second diode (D2), the output current flows through the second switch (SW2).

  According to this aspect, power loss in the rectifier circuit (4) can be reduced.

  The power generation device (1) according to the tenth aspect is the output-side capacitor (C1) electrically connected between the output terminals (P21, P22) of the rectifier circuit (4) in any one of the first to ninth aspects. Is further provided.

  According to this aspect, the voltage applied to the load can be stabilized.

  The power generation device (1) according to the eleventh aspect is the input side capacitor (C2) electrically connected between the input terminals (P11, P12) of the rectifier circuit (4) in any one of the first to tenth aspects. Is further provided.

  According to this aspect, it is possible to suppress a reduction in power loss.

  In the power generation device (1) according to the twelfth aspect, in any one of the first to eleventh aspects, the on state and the off state of the switches (SW1, SW3) are switched after the coil (21) starts power generation. .

  According to this aspect, the position of the switch (SW1, SW3) is compared with the case where the switch (SW1, SW3) is switched between the on state and the off state before the coil (21) starts power generation. There are few restrictions and the structure of a power generator (1) can be simplified.

  The input device 10 according to the thirteenth aspect includes the power generation device (1) according to any one of the first to twelfth aspects, an input unit (6), and a communication unit (7). The input unit (6) moves the movable unit (3). The communication unit (7) is electrically connected between the output terminals of the rectifier circuit (4) and transmits a radio signal.

  According to this aspect, power loss in the power generation device (1) is suppressed. Thereby, reduction of the electric power supplied to a communication part (7) is suppressed, and the communication part (7) can transmit a radio signal stably.

DESCRIPTION OF SYMBOLS 1 Power generator 21 Coil 3 Movable part 4 Rectifier circuit 41 1st actuator (actuator)
431 First movable contact (movable contact)
440 Common fixed contact (fixed contact)
6 Input unit 7 Communication unit SW1 First switch (switch)
SW2 Second switch SW3 Slide switch (switch)
D1 First diode (diode)
D2 Second diode (diode)
C1 output side capacitor C2 input side capacitor P21, P22 output terminal P11, P12 input terminal

Claims (13)

A movable part that moves between a first position and a second position;
When the movable part moves from the second position to the first position, a first current flowing in the first current direction is generated, and the movable part moves from the first position to the second position. A coil for generating a second current flowing in a second current direction opposite to the first current direction;
A rectifier circuit that receives the first current and the second current from the coil and outputs an output current flowing in a predetermined direction, and
The rectifier circuit is turned on when the movable part moves from the second position to the first position, and is turned off when the movable part moves from the first position to the second position. Including switches
Power generation device. The switch has an actuator driven by movement of the movable part,
The power generation device according to claim 1. The switch is
A movable contact provided on the movable part and moving together with the movable part;
The movable part contacts the movable contact by moving from the second position to the first position, and moves away from the movable contact by moving the movable part from the first position to the second position. A fixed contact;
Having
The power generation device according to claim 1. The switch decreases the resistance value when the pressing force increases as the movable part moves from the second position to the first position, and the movable part moves from the first position to the second position. A pressure sensor that increases the resistance value when the pressing force is reduced.
The power generator according to claim 1. The pressure sensor changes the resistance value in proportion to the pressing force.
The power generator according to claim 4. The movable part includes a magnet that generates a magnetic flux passing through the coil,
The direction of the magnetic flux passing through the coil when the movable part is in the first position is opposite to the direction of the magnetic flux passing through the coil when the movable part is in the second position.
The power generator according to any one of claims 1 to 5. The rectifier circuit is
A first current path including the switch, through which the first current and the output current flow;
A second current path through which the second current and the output current flow;
A bridge circuit having
The power generator according to any one of claims 1 to 6. The first current path includes a first switch that is the switch;
The second current path is turned on when the movable portion moves from the first position to the second position, and is turned off when the movable portion moves from the second position to the first position. Including a second switch to become a state,
The power generator according to claim 7. The first current path further includes a first diode through which the first current flows,
The second current path further includes a second diode through which the second current flows,
When the first current flows through the first diode, the output current flows through the first switch;
When the second current flows through the second diode, the output current flows through the second switch;
The power generator according to claim 8. An output-side capacitor electrically connected between the output terminals of the rectifier circuit;
The power generator according to any one of claims 1 to 9. An input-side capacitor electrically connected between the input terminals of the rectifier circuit;
The power generator according to any one of claims 1 to 10. The on state and the off state of the switch are switched after the coil starts power generation,
The power generator according to any one of claims 1 to 11. A power generator according to any one of claims 1 to 12,
An input unit for moving the movable unit;
A communication unit that is electrically connected between the output ends of the rectifier circuit and transmits a radio signal;
Input device.

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