JP2010286428A - Power generator for watch and power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generator for a watch and a power generator capable of reducing the overall size of the device with a simple structure and capable of generating power efficiently by electrostatic induction.
SOLUTION: A first electrode 56 having a radial portion 58 formed radially from a rotation center portion of the second hand wheel 38 on a lower surface of the second hand wheel 38, and an electret film which is a charge holding body on the first electrode 56. 59, and a radial portion 62 formed radially from the center of rotation of the second hand wheel 38 on the upper surface of the plate-shaped train wheel bridge 34 so as to face the electret film 59 and the first electrode 56. A second electrode 60 was provided. Therefore, when the second hand wheel 38 rotates, the first electrode 56 and electret film 59 of the second hand wheel 38 and the second electrode 60 of the train wheel bridge 34 are relatively driven to rotate, and the electric charge held on the electret film 59 Flows to the second electrode 60 by the action of electrostatic induction. As a result, the mechanical rotational kinetic energy of the second hand wheel 38 can be efficiently converted into electric energy and supplied to the power storage unit by the action of electrostatic induction. it can.
[Selection] FIG.

Description

  The present invention relates to a power generation device for a watch that uses electrostatic induction and a power generation device that is used in a traveling body such as a bicycle to generate power by electrostatic induction.

  2. Description of the Related Art Conventionally, as described in Patent Document 1, a power generation device that is provided on a bicycle axle and generates power in accordance with the traveling of the bicycle is known as a power generation device. The power generation device includes a fixed plate fixed to an axle attached to a bicycle frame, and a rotating plate attached to a wheel hub rotatably attached to the axle, and a plurality of coil portions on the fixed plate. When a plurality of magnets are provided on the rotating plate so as to face the coil portion, and the plurality of magnets and the plurality of coil portions rotate relative to each other according to the rotation of the wheel, current is generated in the coil portion by electromagnetic induction. It is configured to generate electricity by flowing.

JP-A-11-150928

  However, in such a conventional power generator, electromagnetic induction in which a current flows through the coil portion by the relative rotation of the coil portion and the magnet is used. Therefore, in order to obtain a practical output voltage, It is necessary not only to provide a large number of magnets and relatively operate at a high frequency, but also to make the coil part multiplex winding, which increases the size of the entire power generation device and complicates the structure of the coil part. There are problems such as.

  The problem to be solved by the present invention is to provide a power generator for a watch and a power generator capable of reducing the size of the entire apparatus with a simple structure and generating power efficiently by electrostatic induction. is there.

In order to solve the above problems, the present invention includes the following components.
According to the first aspect of the present invention, there is provided a flat substrate, a rotating member that rotates while facing the plane of the substrate, a time indicating hand that is rotated by the rotating member, and the rotating member that rotates. A first electrode provided with a radiating portion formed radially from the rotation center of the member, and a second electrode provided with a radiating portion formed on the flat substrate so as to face the radiating portion of the first electrode. A timepiece power generator comprising: an electrode; and a charge holding body provided on one of the first electrode and the second electrode.

  According to a second aspect of the present invention, there is provided a rotary drive unit that rotationally drives, a disk-like rotary member that rotates by driving of the rotary drive unit, and a flat plate-like substrate disposed so as to face the plane of the rotary member And a first electrode having a radiating portion formed radially on the rotating member from a rotation center portion of the rotating member, and formed on the flat substrate so as to face the radiating portion of the first electrode. And a charge holding body provided on one of the first electrode and the second electrode.

  The invention according to claim 3 is provided with a power storage unit that stores electric charges generated by relative rotation of the first electrode and the second electrode. It is.

According to a fourth aspect of the present invention, there is provided transmission means for transmitting electricity generated by relative rotation of the first electrode and the second electrode as electric energy, and the electricity transmitted by the transmission means is converted into electric energy. The power generation device according to claim 2, further comprising: a receiving unit that receives the signal as a receiving device.

  According to a fifth aspect of the present invention, the first electrode is provided on both surfaces of the rotating member, and the substrate is a first substrate facing one surface of the rotating member and the other surface of the rotating member. And the second electrode is provided on each of the first and second substrates facing both surfaces of the rotating member so as to face the first electrode. The power generator according to any one of claims 2 to 4, which is characterized in that it is a power generator.

According to a sixth aspect of the present invention, a power generation unit is constituted by the rotary member provided with the first electrode and the flat substrate facing the rotary member, and a plurality of sets of the power generation units are arranged. The power generator according to any one of claims 2 to 5, wherein the power generator is provided.

  The invention according to claim 7 is a power generation device including a power generation device main body that can be attached to a main body portion including a rotating portion, wherein the power generation device main body is engaged with and fixed to the main body portion. A fixed substrate having a shape, a rotating member that is driven to rotate by being engaged with the rotating portion in a state of facing the plane of the fixed substrate, and radiation that is radially formed on the rotating member from the rotation center portion of the rotating member. A first electrode having a portion, a second electrode having a radiation portion formed on the fixed substrate so as to face the radiation portion of the first electrode, and the first electrode and the second electrode. And a charge holding body provided on one side.

  According to this invention, the charge holding body provided on one of the first electrode provided on the rotating member and the second electrode provided on the flat substrate is rotated relative to the other electrode. Then, the electric charge of the charge holding body flows to the other electrode, so that the mechanical rotational kinetic energy of the rotating member can be efficiently converted into electric energy by electrostatic induction. For this reason, it is possible to reduce the size of the entire apparatus with a simple structure and to efficiently generate power by electrostatic induction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged cross-sectional view showing Embodiment 1 of an electronic wristwatch to which a power generation device of the present invention is applied. It is the enlarged bottom view which looked at the electronic wristwatch of FIG. 1 from the lower surface side. FIG. 3 is an enlarged bottom view showing a state where a back cover is removed from the electronic wristwatch of FIG. 2. FIG. 4 is an enlarged bottom view showing the timepiece module of FIG. 3. It is the expansion perspective view which showed the timepiece module of FIG. FIG. 4 is an enlarged bottom view showing a state where a rotating plate is removed from the timepiece module of FIG. 3. It is the expanded sectional view which showed the A section of FIG. FIG. 6 is an enlarged perspective view showing the rotating plate of FIG. It is the enlarged plan view which looked at the rotating plate of FIG. 8 from upper direction. FIG. 2 is an enlarged cross-sectional view showing a timepiece movement in the timepiece module of FIG. 1. FIG. 11 is an enlarged bottom view showing a train wheel mechanism in the timepiece movement of FIG. 10. FIG. 11 is an enlarged cross-sectional view showing a main part of the timepiece movement of FIG. 10. It is the expanded sectional view which showed the principal part of the second hand wheel and train wheel bridge in FIG. It is the expansion perspective view which decomposed | disassembled and showed the second hand wheel in FIG. It is the figure which showed the circuit structure which combined the 1st electric power generating apparatus and the 2nd electric power generating apparatus incorporated in the electronic wristwatch of FIG. It is an expanded sectional view of the important section showing the modification of the 1st electrode of the second hand wheel and the 2nd electrode of the train wheel bridge in Embodiment 1. It is the side view which showed the front-wheel side of the bicycle in Embodiment 2 of the bicycle to which the electric power generating apparatus of this invention is applied. It is the expanded sectional view which showed the principal part in the AA arrow of FIG. It is the expanded sectional view which showed the principal part of the electric power generating apparatus in FIG. 18 shows the rotating plate and the fixed plate of FIG. 18, (a) is an enlarged right side view showing the rotating plate, and (b) is an enlarged left side view showing the fixed plate. It is the expanded side view which showed the principal part by the side of the front wheel of a bicycle in Embodiment 3 of the bicycle to which the electric power generating apparatus of this invention is applied. It is the expanded sectional view which showed the principal part in the BB arrow of FIG. It is the expanded sectional view which showed the principal part of the electric power generating apparatus in FIG. FIG. 23 is an enlarged right side view showing the fixing plate in FIG. 22. FIG. 23 is an enlarged left side view showing a rotating plate in FIG. 22. FIG. 6 is an enlarged cross-sectional view of a main part showing a modification in which first electrodes are provided on both surfaces of one rotating plate in the second and third embodiments. FIG. 10 is an enlarged cross-sectional view of a main part illustrating a modification of a power generating device having a multiple structure in which a plurality of power generating units each including one rotating plate and one fixed are provided in the second and third embodiments. In the second and third embodiments, the main part is enlarged to show a modified example of the power generating device having a multiple structure in which a plurality of power generating units each including a rotating plate provided with first electrodes on both surfaces and a pair of fixed plates opposed to the rotating plate are provided. It is sectional drawing.

(Embodiment 1)
A first embodiment in which the present invention is applied to a pointer-type electronic wristwatch will be described below with reference to FIGS.
As shown in FIG. 1, the electronic wristwatch includes a wristwatch case 1. The wristwatch case 1 includes a case main body 2 and a ring-shaped bezel 3 provided on the upper outer periphery of the case main body 2.

A watch glass 4 is attached to the upper opening of the watch case 1, that is, the upper opening of the bezel 3, via a packing 4a. And as shown in FIG. 2, the back cover 5 is attached via the waterproof ring 5a. A watch module 6 is provided in the watch case 1.

As shown in FIG. 1, the timepiece module 6 includes an upper housing 7 and a lower housing 8, and a circuit board 9 is provided therebetween. In this case, a dial plate 10 is provided on the upper surface of the upper housing 7. A clock movement 11 described later is provided in the upper housing 7.

Further, as shown in FIGS. 3 to 6, the lower housing 8 is provided with a battery housing portion 13 for housing the battery 12 and an antenna 14 for receiving radio waves including standard time data. Yes. As shown in FIG. 6, a metal base plate 15 is provided on the lower surface (the front surface in FIG. 6) of the lower housing 8 except for portions corresponding to the battery housing portion 13 and the antenna 14. The base plate 15 is provided with a plurality of hook portions 15 a at the peripheral edge thereof, and the plurality of hook portions 15 a are locked to the side surface of the upper housing 7, thereby fixing the upper housing 7 to the lower housing 8. It is configured as follows.

As shown in FIGS. 1 and 7, a first power generator 16 is provided on the lower surface side (the front surface side in FIG. 6) of the lower housing 8. The first power generation device 16 includes a ground plate 15 that is a flat substrate and a rotating plate 17 that rotates to face the plane of the ground plate 15. The rotating plate 17 is made of a conductive metal. As shown in FIG. 1, the center portion of the rotating plate 17 is attached to the lower housing 8 and protrudes below the ground plate 15. It is attached.

That is, as shown in FIG. 1, the fixed shaft 18 is screwed into a nut portion 8 a embedded in the lower housing 8 through a shaft hole 17 a (see FIGS. 8 and 9) provided in the center portion of the rotating plate 17. By doing so, it is attached to the lower housing 8. The rotary plate 17 is provided with a bearing 19 corresponding to the shaft hole 17a at the center thereof, and the bearing 19 is rotatably attached to the fixed shaft 18, so that a constant interval is always maintained with respect to the lower surface of the main plate 15. In this state, it is configured to rotate around the fixed shaft 18.

In this case, the fixed shaft 18 and the nut portion 8a are made of a conductive metal, and as shown in FIG. 1, the nut portion 8a is disposed between the upper housing 7 and the lower housing 8; Electrically connected. Thus, the rotating plate 17 is electrically connected to the circuit board 9 via the fixed shaft 18 and the nut portion 8a. Although the fixed shaft 18 is disposed on the same axis as a pointer shaft of the timepiece movement 11 described later, it is not always necessary to be disposed on the same axis as the pointer shaft.

Further, as shown in FIGS. 5, 8, and 9, the rotating plate 17 includes a small-diameter circular portion 20 and a semicircular arc portion having a larger diameter than the small-diameter circular portion 20 and formed in a substantially semicircular arc shape. 21. The small-diameter circular portion 20 is provided with a shaft hole 17a into which the fixed shaft 18 is inserted at the center thereof. The semicircular arc portion 21 is integrally formed on the outer peripheral portion of the small-diameter circular portion 20 with the weight portion 21a provided on the outer peripheral portion. Thereby, the rotating plate 17 is configured to rotate around the fixed shaft 18 by the inertia of the weight portion 21a of the semicircular arc portion 21 when receiving external vibration such as shaking the wristwatch case 1.

Further, as shown in FIGS. 1 and 7 to 9, the first electrode 22 is provided on the upper surface of the rotating plate 17 via an insulating film 23. In this case, as shown in FIGS. 8 and 9, the insulating film 23 is provided over almost the entire upper surface of the semicircular arc portion 21 of the rotating plate 17. The first electrode 22 provided on the insulating film 23 includes a radial portion 24 that is formed radially from the shaft hole 17 a that is the rotation center portion of the rotating plate 17.

As shown in FIGS. 7, 8, and 9, the radial portion 24 has a large number of electrode pieces 24 a radially arranged on the insulating film 23 provided on the semicircular arc portion 21 of the rotating plate 17 at regular intervals. It is configured. That is, in the radial portion 24, a large number of electrode pieces 24a are elongated in the radial direction with a substantially constant width, and adjacent electrode pieces 24a are arranged with a gap of a constant interval.

Further, the radial portion 24 is guided to the side of the insulating film 23 and electrically connected to the rotating plate 17 in a state where a large number of electrode pieces 24a are all connected at the inner peripheral end and the outer peripheral end. Yes. Thereby, the first electrode 22 is electrically connected to the circuit board 9 via the rotating plate 17 and the fixed shaft 18. Further, as shown in FIG. 7, an electret film 25 that is a charge holding member is formed on each electrode piece 24a. The electret film 25 is an insulator having a semi-permanent charge, and is made of a charge holding material such as a fluorocarbon resin or an amorphous fluororesin.

Examples of the charge holding material that can be used as the electret film include polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polystyrene (PS), polytetrafluoroethylene (PTFE), and tetrafluoroethylene-perfluoro. Alkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene (PCTFE) ), chlorotrifluoroethylene - ethylene copolymer (ECTFE), and polyvinyl fluoride polymeric charge retaining material such as chloride (PVF) or silicon oxide, (SiO ₂₎ Contact An inorganic charge retaining material such as microcrystalline silicon nitride (SiN).

On the other hand, as shown in FIGS. 6 and 7, a second electrode 26 is provided via an insulating film 27 on the lower surface of the ground plate 15, which is a substrate facing the rotating plate 17. In this case, as shown in FIG. 6, the insulating film 27 is approximately half of the semicircular arc of the first electrode 22 at a position corresponding to the movement locus on which the first electrode 22 of the rotating plate 17 rotates ( The second electrode 26 is provided on the lower surface (the front surface in FIG. 6) of the insulating film 27. The second electrode 26 is made of a conductive metal and includes radial portions 28 that are formed radially from the fixed shaft 18 that is the rotation center portion of the rotating plate 17.

As shown in FIG. 6, the radial portion 28 has a configuration in which a large number of electrode pieces 28 a are radially arranged on the insulating film 27 provided on the ground plane 15 at regular intervals. That is, in the radial portion 28, like the radial portion 24 of the first electrode 22, a large number of electrode pieces 28 a are elongated in the radial direction with a substantially constant width, and the electrode pieces 28 a adjacent to each other are formed. Except for a part, they are arranged with gaps at regular intervals. The radial portion 28 is exposed on the upper surface of the insulating film 27 in a state where a large number of electrode pieces 28a are all connected at the inner and outer peripheral ends, and the exposed portion is exposed as shown in FIG. The circuit board 9 is electrically connected by a connection member 29 such as a coil spring.

Thus, in the first power generation device 16, when the rotating plate 17 rotates and the first electrode 22 provided on the rotating plate 17 rotates relative to the second electrode 26 provided on the ground plate 15. The electret film 25 formed on the large number of electrode pieces 24a of the first electrode 22 and the large number of electrode pieces 28a of the second electrode 26 move relatively, and the electret film 25 of the first electrode 22 and the second Electricity is generated when the amount of induced charge between the electrode 26 and the electrode 26 changes. That is, when the electret film 25 and the second electrode 26 of the first electrode 22 move relative to each other, the electric charge on the electret film 25 side flows to the second electrode 26 side opposite thereto due to electrostatic induction, thereby generating power. Done.

By the way, as shown in FIGS. 10 to 12, the timepiece movement 11 of the timepiece module 6 includes a first drive system 31 that moves the second hand 30a, a second drive system 32 that moves the minute hand 30b and the hour hand 30c, and a second hand 30a. , And a detection unit 33 for detecting the moving position of the minute hand 30b and the hour hand 30c.
The first and second drive systems 31 and 32 are disposed between the upper housing 7 and the lower housing 8 in a state where they are attached to the main plate 35a, the train wheel bridge 34, and the core holder 35b.

As shown in FIGS. 10 to 12, the first drive unit 31 includes a first stepping motor 36, a fifth wheel 37 rotated by the first stepping motor 36, and a fourth wheel rotated by the fifth wheel 37. And a second hand wheel 38 which is a number wheel. The second hand 30 a is attached to the second hand shaft 38 a of the second hand wheel 38.
As shown in FIGS. 10 and 11, the first stepping motor 36 includes a coil block 36a, a stator 36b, and a rotor 36c. When a current is passed through the coil block 36a, a magnetic field is generated, and the rotor 36c is 180. It is configured to be rotated step by step.

As shown in FIGS. 10 to 12, the fifth wheel 37 is engaged with the rotor kana 36 d of the rotor 36 c in the first stepping motor 36 and rotates. The second hand wheel 38 meshes with the pinion 37a of the fifth wheel 37 and rotates. A second hand shaft 38 a is provided at the center of the second hand wheel 38. The second hand shaft 38a protrudes upward through the through holes 10a of the upper housing 7, the solar panel 39, and the dial plate 10 as shown in FIG. As shown in FIGS. 10 and 12, a second hand 30a is attached to the protruding tip. Further, the second hand wheel 38 is provided with a first light transmission hole portion 40 as shown in FIGS. 11, 12, and 14.

  On the other hand, as shown in FIGS. 10 to 12, the second drive unit 32 includes a second stepping motor 41, an intermediate wheel 42 rotated by the second stepping motor 41, and a third wheel rotated by the intermediate wheel 42. 43, a minute hand wheel 44 that is a second wheel that is rotated by the third wheel 43, a minute wheel 45 that is rotated by the minute wheel 44, and an hour wheel that is a hour wheel that is rotated by the minute wheel 45 46. The minute hand 30 b is attached to the minute hand shaft 44 a of the minute hand wheel 44. The hour hand 30 c is attached to the hour hand shaft 46 a of the hour hand wheel 46.

As shown in FIGS. 10 and 11, the second stepping motor 41 includes a coil block 41a, a stator 41b, and a rotor 41c. When a current is passed through the coil block 41a, a magnetic field is generated, and the rotor 41c It is configured to rotate step by 180 degrees.
As shown in FIGS. 10 to 12, the intermediate wheel 42 meshes with the rotor kana 41 d of the rotor 41 c in the second stepping motor 41 and rotates. As shown in FIG. 12, the intermediate wheel 42 is provided with a fourth light transmission hole 47. The third wheel 43 is meshed with the pinion 42a of the intermediate wheel 42 and rotated, and the minute hand wheel 44 is meshed with the pinion 43a of the third wheel 43 and rotated.

As shown in FIGS. 10 and 12, a cylindrical minute hand shaft 44 a is provided at the center of the minute hand wheel 44. The second hand shaft 38 a of the second hand wheel 38 is rotatably inserted and protrudes upward. As shown in FIG. 10, the minute hand shaft 44 a protrudes upward through the through holes 10 a of the upper housing 7, the solar panel 39, and the dial 10. As shown in FIG. 10, a minute hand 30b is attached to the protruding tip. Thereby, the minute hand wheel 44 is arranged on the same axis as the second hand wheel 38 in a state where the minute hand wheel 44 overlaps the upper side of the second hand wheel 38. Further, the minute hand wheel 44 is provided with a second light transmission hole 48 as shown in FIG.

As shown in FIG. 10, the date wheel 45 rotates while meshing with a pinion 44 b of the minute hand wheel 44. The hour hand wheel 46 is engaged with the pinion 45a of the minute wheel 45 and rotates. At the center of the hour hand wheel 46, a cylindrical hour hand shaft 46a is provided, which is rotatably inserted by the minute hand shaft 44a of the minute hand wheel 44 so as to protrude upward. At this time, the needle shaft 46 a protrudes upward through the through holes 10 a of the upper housing 7, the solar panel 39, and the dial 10 as shown in FIG. 10. The hour hand 30c is attached to the protruding tip as shown in FIG. Thereby, the hour hand wheel 46 is arranged on the same axis as the second hand shaft 38 a and the minute hand shaft 44 a in a state where the hour hand wheel 46 is overlapped with the upper side of the minute hand wheel 44. Further, the hour wheel 46 is provided with a third light transmission hole 49 as shown in FIG.

As shown in FIGS. 10 and 12, the detection unit 33 includes a light emitting element 51 made of an LED (light emitting diode) and a light receiving element 52 made of a phototransistor provided on the upper housing 7 and the circuit board 9, respectively. One of the light transmission holes 40a, 40b, 40c of the second hand wheel 38: The light transmission hole 48 of the minute hand wheel 44: One of the light transmission holes 490 of the hour hand wheel 46: The light transmission hole of the intermediate wheel 42 47 coincides with or part of the light path between the light emitting element 51 and the light receiving element 52, that is, the detection position P (in this embodiment, the detection position P is provided at the noon position (00:00:00 position)). When they overlap, the light receiving element 52 receives the light from the light emitting element 51 through the light transmitting portions, and thereby the rotational positions of the second hand wheel 38, the minute hand wheel 44, and the hour hand wheel 46 are detected. Yes. The detection position P may be provided at other positions such as 11:55.

In this electronic wristwatch, when the position of the second hand 30a, the minute hand 30b, and the hour hand 30c is detected by the detection unit 33, the light emitting element 51 of the detection unit 33 is rotated while the second hand wheel 38, the minute hand wheel 44, and the hour hand wheel 46 are rotated at high speed. When the light passes through the light transmission hole portion 49 of the hour hand wheel 46, the light transmission hole portion 48 of the minute hand wheel 44, and the light transmission hole portion 40 of the second hand wheel 38, the transmitted light is received by the light receiving element 52. Is detected, the rotational positions of the second hand wheel 38, the minute hand wheel 44, and the hour hand wheel 46 are detected, and the hand moving positions of the second hand 30a, the minute hand 30b, and the hour hand 30c are detected, and the time is adjusted based on this. It is configured.

As shown in FIGS. 12 to 14, the timepiece movement 11 is provided with a second power generation device 55. The second power generation device 55 is a flat wheel train receiver 34 that rotatably supports the second hand shaft 38 a of the second hand wheel 38 of the first drive unit 31, and a rotating member that rotates to face the wheel train receiver 34. A second hand wheel 38 is provided. As shown in FIGS. 13 and 14, the first electrode 56 is provided on the lower surface of the second hand wheel 38 through an insulating film 57.

In this case, as shown in FIGS. 13 and 14, the insulating film 57 has a circular shape at a position located on the inner peripheral side of the first light transmission hole 40 (40 a, 40 b, 40 c) on the lower surface of the second hand wheel 38. The first electrode 56 is provided on the lower surface of the insulating film 57. The first electrode 56 includes radial portions 58 that are formed radially from the second hand shaft 38 a that is the rotation center of the second hand wheel 38. As shown in FIGS. 13 and 14, the radial portion 58 has a structure in which a large number of electrode pieces 58 a are radially arranged on a circular insulating film 57 provided on the second hand wheel 38 at regular intervals. .

That is, in the radial portion 58, as in the first power generation device 16, a large number of electrode pieces 58a are elongated in the radial direction with a substantially constant width, and the electrode pieces 58a adjacent to each other are spaced at a constant interval. It is arranged with a gap of. The radial portion 58 is guided to the side of the insulating film 57 and electrically connected to the second hand wheel 38 in a state where a large number of electrode pieces 58a are all connected at the inner and outer peripheral ends. Yes.

In this case, the second hand wheel 38 and the second hand shaft 38 a are made of conductive metal, and when the second hand shaft 38 a is rotatably supported by the train wheel bridge 34, the lower end portion of the second hand shaft 38 a is connected to the train wheel bridge 34. It is connected to a connection wiring 34 a provided on the lower surface, and this connection wiring 34 a is electrically connected to the circuit board 9. Thereby, the first electrode 56 is electrically connected to the circuit board 9 via the second hand wheel 38, the second hand shaft 38 a and the connection wiring 34 a of the train wheel bridge 34.

Further, as shown in FIG. 13, an electret film 59 that is a charge holding body is formed on the lower surface of each electrode piece 58 a of the first electrode 56. The electret film 59 is an insulator having a semi-permanent charge, like the first power generation device 16, and is formed of the same material as the electret film 25 of the first power generation device 16.

On the other hand, as shown in FIGS. 12 to 14, the second electrode 60 is provided on the upper surface of the train wheel bridge 34, which is a substrate facing the second hand wheel 38, via an insulating film 61. In this case, as shown in FIG. 14, the insulating film 61 is provided in a circular shape having the same size as the first electrode 56 at a position corresponding to the movement locus on which the first electrode 56 of the second hand wheel 38 rotates. A second electrode 60 is provided on the upper surface of the insulating film 61. The second electrode 60 is made of a conductive metal, and includes a substantially circular radial portion 62 that is formed radially from the second hand shaft 38 a that is the rotation center portion of the second hand wheel 38.

As shown in FIGS. 13 and 14, the radial portion 62 has a structure in which a large number of electrode pieces 62 a are radially arranged on the insulating film 61 provided on the train wheel bridge 34 at regular intervals. That is, in the radial portion 62, like the radial portion 58 of the first electrode 56, a large number of electrode pieces 62 a are formed elongated in the radial direction with a substantially constant width, and the electrode pieces 62 a adjacent to each other are formed. They are arranged with gaps at regular intervals.

Further, as shown in FIG. 14, the radial portion 62 includes a connection wiring 34 b provided on the upper surface of the train wheel bridge 34 in a state where a large number of electrode pieces 62 a are all connected at the inner peripheral end and the outer peripheral end. It is connected to the. The connection wiring 34 b is electrically connected to the circuit board 9 without coming into contact with the connection wiring 34 a provided on the lower surface of the train wheel bridge 34. Thus, the second electrode 60 is electrically connected to the circuit board 9 by the connection wiring 34 b on the upper surface side of the train wheel bridge 34.

Thus, in the second power generation device 55, the second hand wheel 38 is driven and rotated by the first stepping motor 36, and the first electrode 56 provided on the second hand wheel 38 is provided on the train wheel bridge 34. Is moved relatively, the electret film 59 formed on the multiple electrode pieces 58a of the first electrode 56 and the multiple electrode pieces 62a of the second electrode 60 move relatively, and the first Similar to the first power generation device 16, it is configured to generate power by changing the amount of induced charge between the electret film 59 of the electrode 56 and the second electrode 60.

Next, circuit configurations of the first power generation device 16 and the second power generation device 55 incorporated in the electronic wristwatch will be described with reference to the principle diagram shown in FIG.
In the first power generator 16 of the electronic wristwatch, the first electrode 22 is connected to the first and second rectifiers 63 and 64, and the second electrode 26 is connected to the third and fourth rectifiers 65 and 66. It is connected. The first rectifier 63 is connected to the positive electrode (+) of the storage battery 67, the second rectifier 64 is connected to the negative electrode (−) of the storage battery 67, the third rectifier 65 is connected to the positive electrode (+) of the storage battery 67, and the fourth The rectifier 66 is connected to the negative electrode (−) of the storage battery 67.

In this case, the first rectifier 63 and the fourth rectifier 66 store charges in the storage battery 67 when the first electrode 22 rotates in one direction (for example, clockwise direction) with respect to the second electrode 26. It is configured to rectify the current flow. Further, the second rectifier 64 and the third rectifier 65 store the electric charge in the storage battery 67 when the first electrode 22 rotates in the reverse direction (for example, counterclockwise direction) with respect to the second electrode 26. It is configured to rectify the current flow.

On the other hand, in the second power generation device 55, the first electrode 56 is connected to the first and second rectifiers 68 and 69, and the second electrode 60 is connected to the third and fourth rectifiers 70 and 71. ing. The first rectifier 68 is connected to the positive electrode (+) of the storage battery 67, the second rectifier 69 is connected to the negative electrode (-) of the storage battery 67, the third rectifier 70 is connected to the positive electrode (+) of the storage battery 67, and the fourth The rectifier 71 is connected to the negative electrode (−) of the storage battery 67.

In this case, the first rectifier 68 and the fourth rectifier 71 store charges in the storage battery 67 when the first electrode 56 rotates in one direction (for example, clockwise direction) with respect to the second electrode 60. It is configured to rectify the current flow. In addition, the second rectifier 69 and the third rectifier 70 store charges in the storage battery 67 when the first electrode 56 rotates in the reverse direction (for example, counterclockwise direction) with respect to the second electrode 60. It is configured to rectify the current flow.

Next, the case where the electronic wristwatch is used by being attached to the arm will be described.
First, when the electronic wristwatch is lightly shaken while walking with arms, the first power generation device 16 incorporated in the wristwatch case 1 generates power. That is, in the first power generation device 16, the rotating plate 17 is rotated by the inertia of the weight portion 21 a of the semicircular arc portion 21 provided on the outer peripheral portion of the small-diameter circular portion 20 according to the swing of the arm. At this time, since the weight portion 21 a is provided on the outer peripheral portion of the semicircular arc portion 21, an inertial force is generated in the rotating plate 17 according to the swing of the arm, and the rotating plate 17 is made to the ground plate 15 by this inertial force. Rotates at regular intervals.

At this time, the rotating plate 17 does not necessarily rotate once (360 ° angle rotation) but swings within an angle range corresponding to the inertial force caused by the arm swing. For this reason, the rotating plate 17 rotates, for example, clockwise by a predetermined angle and then rotates counterclockwise by a predetermined angle. By repeating this operation, the power generation is repeated and stored in the storage battery 34. At this time, when the rotating plate 17 rotates within an angular range of 180 °, the electret film 25 formed on the multiple electrode pieces 24a of the first electrode 22 and the multiple electrode pieces 28a of the second electrode 26 are always Since they move relative to each other in a state of facing each other, power is generated continuously.

That is, when the rotating plate 17 rotates clockwise by an angle within an angular range of 180 °, the electret film 25 and the second electrode 26 formed on the electrode pieces 24a of the first electrode 22 are formed. The pieces 28a move relative to each other, and the amount of induced charges between the many electret films 25 of the first electrode 22 and the many electrode pieces 28a of the second electrode 26 changes. Store in the storage battery 34.

In addition, when the rotating plate 17 rotates counterclockwise at an angle within an angle range of 180 °, a large number of electret films 25 and second electrodes 26 formed on a large number of electrode pieces 24 a of the first electrode 22. The electrode pieces 28a of the first electrode 22 move relative to each other, and the amount of induced charges between the many electret films 25 of the first electrode 22 and the many electrode pieces 28a of the second electrode 26 changes, thereby generating electric power. The electric charge is stored in the storage battery 34.

Further, when the arm to which the electronic wristwatch is attached is bent and moved quickly in the vertical direction, the rotating plate 17 of the first power generator 16 incorporated in the wristwatch case 1 is provided on the outer peripheral portion of the small-diameter circular portion 20. The semicircular arc portion 21 rotates continuously in the same direction (clockwise or counterclockwise) due to the inertia of the weight portion 21a. At this time, since the first electrode 22 having a large number of electret films 25 is provided on the semicircular arc portion 21, the second electrode 26 is moved to the first electrode when the rotating plate 17 is rotated halfway (rotated 180 °). However, in the next half rotation (angle rotation of 180 ° to 360 °), the range in which the second electrode 26 faces the first electrode 22 becomes narrower, and the first and second There is a range where the electrodes 22 and 26 do not face each other.

For this reason, when the rotating plate 17 rotates halfway with the second electrode 26 facing a part of the first electrode 22, the electret film 25 formed on the many electrode pieces 24a of the first electrode 22 and the first electrode 22 A large number of electrode pieces 28a of the two electrodes 26 move relatively, and the amount of induced charge between the many electret films 25 of the first electrode 22 and the many electrode pieces 28a of the second electrode 26 changes. Thus, electric power is generated and electric charges are stored in the storage battery 34.

Further, at the next half rotation (angle rotation of 180 ° to 360 °), the range in which the second electrode 26 faces the first electrode 22 becomes narrow, and therefore, the plurality of electret films 25 of the first electrode 22 and the second electrode The range in which the induced charge amount between the electrode pieces 28a of the electrode 26 changes is narrowed, the power generation amount is reduced, and no power is generated when the first and second electrodes 22 and 26 are not opposed to each other. . As a result, when the rotating plate 17 continuously rotates in one direction, electric power is generated approximately every half rotation of the rotating plate 17, so that the electric charge is intermittently stored in the storage battery 34 approximately every half rotation.

On the other hand, when the time is adjusted in the electronic wristwatch, the second power generation device 55 generates power. That is, when the time is corrected, the light emitting element 51 of the detection unit 33 is caused to emit light while rotating the second hand wheel 38, the minute hand wheel 44, and the hour hand wheel 46 at high speed, and the light is transmitted through the light transmission hole 49 of the hour hand wheel 46. When the light passing through the light transmitting hole 48 of the minute hand wheel 44 and the light transmitting hole 40 of the second hand wheel 38 is received by the light receiving element 52, the second hand wheel 38, the minute hand wheel 44, and the hour hand wheel are received. Each rotational position of 46 is detected, and the moving positions of the second hand 30a, the minute hand 30b, and the hour hand 30c are detected, and the time is corrected based on this.

For this reason, when the second hand wheel 38 which is the rotating member of the second power generation device 55 rotates at a high speed, the electret film 59 formed on the large number of electrode pieces 58a in the radial portion 58 of the first electrode 56 and the radial shape of the second electrode 60. The plurality of electrode pieces 62a in the portion 62 are relatively rotated while being opposed to each other.

That is, the first electrode 56 having a large number of electret films 59 is formed in a circular shape on the lower surface of the second hand wheel 38, and the second electrode 60 having a large number of electrode pieces 62 a is the upper surface of the train wheel bridge 34. Are formed in a circular shape corresponding to the first electrode, so that a large number of electret films 59 of the first electrode 56 and a large number of electrode pieces 62a of the second electrode 60 are relatively opposed to each other. Rotate and move.

As a result, the amount of induced charge between the many electret films 59 of the first electrode 56 and the many electrode pieces 62a of the second electrode 60 changes, so that even if the second hand wheel 38 rotates forward (clockwise), Further, even if it rotates in the reverse direction (counterclockwise), it continuously generates power and stores it in the power storage unit 67. In this case, since the second hand wheel 38 only rotates 6 ° per second in a normal hand movement, the amount of power generation is small, but it rotates at a high speed when the time is adjusted, so that a large number of electrets of the first electrode 56 are used. A change in the amount of induced charge between the film 59 and the many electrode pieces 62a of the second electrode 60 is large, and a sufficient power generation amount is obtained.

As described above, according to this electronic wristwatch, when the wristwatch case 1 is attached to the arm and used, the first power generation device 16 incorporated in the wristwatch case 1 generates power according to the movement of the arm. In addition, when the time is adjusted, the second hand wheel 38 of the watch movement 11 incorporated in the watch case 1 rotates at a high speed, so that the second power generation device 55 can generate electric power. The first power generation device 16 and the second power generation device 55 can generate power efficiently, and the generated power can be well stored in the storage battery 67.

In this case, the first power generation device 16 includes a ground plate 15 that is a flat substrate provided in the timepiece module 6, a rotating plate 17 that rotates on the plane of the ground plate 15, and a rotational center portion of the rotating plate 17. A first electrode 22 having a radial portion 24 formed radially from the shaft hole 17a, and a radial portion 28 formed on the ground plate 15 so as to face the radial portion 24 of the first electrode 22. Since the second electrode 26 and the electret film 25 that is a charge holding body provided on the first electrode 22 are provided, the entire device can be reduced in size with a simple structure, and the power can be generated efficiently. be able to.

That is, according to the power generation device 16, the rotating plate 17 is configured to rotate on the plane of the flat plate 15 due to external vibration such as arm swinging. The electret film 25 which is a charge holding body is formed on the first electrode 22 provided on the rotating plate 17 and can be rotated at a constant interval. The electret film 25 of the first electrode 22 and the ground plane 15 are formed on the first electrode 22. Since the provided second electrode 26 is relatively rotated, the mechanical rotational kinetic energy of the rotating plate 17 can be efficiently converted into electric energy. Therefore, the structure is simple, the entire apparatus can be reduced in size, and power can be generated efficiently.

The second power generation device 55 includes a train wheel bridge 34 that is a flat substrate incorporated in the timepiece movement 11, a second hand wheel 38 that is a rotating member that rotates to face the plane of the train wheel bridge 34, and A second hand 30a which is a pointer for indicating the time which is rotationally driven by the second hand wheel 38, and a first electrode 56 which is provided on the second hand wheel 38 with a radial portion 58 formed radially from the second hand shaft 38a which is the center of rotation thereof. The second electrode 60 having the radial portion 62 formed on the train wheel bridge 34 so as to face the radial portion 58 of the first electrode 56, and the electret film that is a charge holding body provided on the first electrode 56 59, it is possible to generate electric power efficiently with a simple structure in which the first and second electrodes 56, 60 are added to the existing timepiece structure.

That is, according to the second power generation device 55, the second hand wheel 38 rotates at a high speed by the first stepping motor 36 when the time is adjusted, so that the second hand wheel 38 rotates on the plane of the plate-shaped train wheel bridge 34. Therefore, the second hand wheel 38 can be rotated at a high speed at a constant interval by the second hand shaft 38a with respect to the train wheel bridge 34, and the charge is held on the first electrode 56 provided on the second hand wheel 38. The electret film 59, which is a body, is formed, and the electret film 59 of the first electrode 56 and the second electrode 60 provided on the train wheel bridge 34 relatively rotate, so that the second hand wheel 38 is mechanically rotated. Kinetic energy can be efficiently converted into electrical energy. Therefore, power can be generated efficiently with a simple structure in which the first and second electrodes 56 and 60 are added to the existing timepiece structure.

In the second power generation device 55 of the first embodiment, the case where the second hand wheel 38 and the train wheel bridge 34 are formed of conductive metal has been described. However, the present invention is not limited to this, and for example, as shown in FIG. In addition, the second hand wheel 38 and the train wheel bridge 34 may be formed of an insulating synthetic resin. In this case, it is not necessary to provide the insulating films 57 and 61 on the mutually facing surfaces of the second hand wheel 38 and the train wheel bridge 34, and as shown in FIG. The electrodes 56 and 60 can be provided.

(Embodiment 2)
Next, with reference to FIGS. 17-20, Embodiment 2 which applied the electric power generating apparatus of this invention to the bicycle is demonstrated.
As shown in FIGS. 17 and 18, the power generation device 80 for a bicycle is provided on the front wheel side of the bicycle.

In this case, as shown in FIGS. 17 and 18, the front wheel side of the bicycle has a metal axle 82 attached to the front frame 81 of the bicycle by a plurality of nuts 82a, and the axle 82 has a cylindrical shape. A hub 83 is rotatably attached by two bearings 84. Wheels 85 are attached to the hub 83 by spokes 86. As shown in FIG. 18, the hub 83 includes a pair of insulating disk parts 83a that are rotatably mounted on both sides of the axle 82 by bearings 84, and a conductive member that connects the outer circumferences of the pair of disk parts 83a. And a cover portion 83b made of a metal.

The bicycle power generation device 80 is provided in a hub 83 as shown in FIG. That is, as shown in FIGS. 18 to 20, the power generation device 80 includes a fixing plate 87 positioned in the hub 83 and fixed to the axle 82 by the nut 82 b, and one of the hubs 83 (the left side in FIG. 18). A rotating plate 88 attached to the inner surface of the disc portion 83a by a bolt 89 and rotating to face the fixed plate 87, and a storage battery 90 provided on the inner surface of the other disc portion 83a (right side in FIG. 18) of the hub 83. And.

The storage battery 90 is formed of a rechargeable battery or a capacitor, is formed in a ring shape as a whole, and the axle 82 is inserted in the center thereof, and the other side (the right side in FIG. 18) of the pair of disk portions 83a. This is fixed to the inner surface of the disc part 83a. The storage battery 90 has a back surface (right side surface in FIG. 18) that is a positive electrode (+) electrically connected to a cover portion 83b of the hub 83 by a connecting member 91a and a front surface that is a negative electrode (−) (FIG. 18, the right side surface) is electrically connected to the axle 82 by a contact plate 91 b that contacts the nut 82 b of the axle 82.

Further, as shown in FIGS. 18 and 19, the first electrode 92 is provided on the rotating plate 88 of the power generation device 80 via an insulating film 93. As shown in FIG. 20A, the insulating film 93 is formed in a ring shape at portions other than the axle 82 and the bolts 89. A first electrode 92 is provided on one surface of the insulating film 93, that is, the surface facing the fixing plate 87 (the lower surface in FIG. 19). The first electrode 92 includes a radial portion 94 that is formed radially from the axle 82 that is the rotation center portion of the rotary plate 88. As shown in FIG. 20A, the radial portion 94 has a configuration in which a large number of electrode pieces 94a are radially arranged on a ring-shaped insulating film 93 provided on the rotating plate 88 at regular intervals. .

That is, in the radial portion 94, a large number of electrode pieces 94a are elongated in the radial direction with a substantially constant width, and the electrode pieces 94a adjacent to each other are arranged with a gap of a constant interval. Further, the radial portion 94 is guided to the side of the insulating film 93 in a state where a large number of electrode pieces 94a are all connected at the inner peripheral end and the outer peripheral end, and is connected to the cover portion 83b of the hub 83 to the connecting member 95. Are electrically connected. As a result, the first electrode 92 is electrically connected to the positive electrode (+) of the storage battery 90 via the connection member 95 and the cover portion 83 b of the hub 83.

Further, as shown in FIGS. 18 and 19, an electret film 96 as a charge holding body is formed on the surface (the lower surface in FIG. 19) of each electrode piece 94a of the first electrode 92. The electret film 96 is an insulator having a semi-permanent charge, like the first and second power generation devices 16 and 55 of the first embodiment, and the electret of the first and second power generation devices 16 and 55. The films 25 and 59 are made of the same material.

On the other hand, the second electrode 97 is provided on the fixed plate 87 facing the rotating plate 88 with an insulating film 98 interposed therebetween as shown in FIGS. In this case, as shown in FIG. 20B, the insulating film 98 has a ring shape having the same size as that of the first electrode 92 at a position corresponding to a movement locus on which the first electrode 92 of the rotating plate 88 rotates. The second electrode 97 is provided on the upper surface of the insulating film 98. The second electrode 97 is made of a conductive metal and includes a radial portion 99 that is formed radially from the axle 82 that is the rotation center portion of the rotating plate 88.

As shown in FIGS. 19 and 20B, the radial portion 99 has a configuration in which a large number of electrode pieces 99a are radially arranged on the insulating film 98 provided on the fixed plate 87 at regular intervals. . That is, in the radial portion 99, as in the radial portion 94 of the first electrode 92, a large number of electrode pieces 99a are formed elongated in the radial direction with a substantially constant width, and the electrode pieces 99a adjacent to each other are formed. They are arranged with gaps at regular intervals.

Further, as shown in FIG. 20 (b), the radial portion 99 is in a state in which a large number of electrode pieces 99a are all connected at the inner peripheral end and the outer peripheral end, and as shown in FIG. Electrically connected. Thereby, as shown in FIG. 18, the 2nd electrode 97 is electrically connected with the negative electrode (-) of the storage battery 90 via the axle shaft 82, the nut 82b, and the contact plate 91b.

In the bicycle power generator 80, when the bicycle travels and the wheel 85 rotates, the hub 83 rotates around the axle 82 together with the wheel 85, and the rotating plate 88 rotates as the hub 83 rotates. The first electrode 92 provided on the rotating plate 88 rotates relative to the second electrode 97 provided on the fixed plate 87, and electrets formed on a large number of electrode pieces 94 a of the first electrode 92. The film 96 and the many electrode pieces 99a of the second electrode 97 move relatively, and the amount of induced charge between the electret film 96 of the first electrode 92 and the second electrode 97 changes, thereby generating electric power. The battery 90 is configured to store electricity.

The bicycle power generator 80 includes a transmission unit 100 that transmits electricity stored in the storage battery 90 as electric energy. As shown in FIG. 18, the transmission unit 100 is provided in a disc part 83 a of a hub 83 provided with a storage battery 90. On the other hand, as shown in FIG. 17, the front frame 81 of the bicycle is provided with a lighting device 101. The lighting device 101 includes a light source unit 102 such as a light emitting diode and a receiving unit 103. The receiving unit 103 is configured to receive the electricity transmitted by the transmitting unit 100 of the power generation device 80 as electric energy and turn on the light source unit 102 by the received electric energy.

According to such a power generation device 80 for a bicycle, the hub 83 of the wheel 85 that is a rotational drive unit that rotationally drives, the disk-shaped rotational plate 88 that rotates by the drive rotation of the hub 83, and the rotational plate 88. A first electrode provided with a fixed plate 87 which is a flat substrate fixed to the axle 82 facing the plane of the above and a radial portion 94 formed radially on the rotary plate 88 from the axle 82 which is the center of rotation thereof. 92, a second electrode 97 having a radial portion 99 formed on the fixing plate 87 so as to face the radial portion 94 of the first electrode 92, and an electret that is a charge holding body provided on the first electrode 92. And the membrane 96, the entire apparatus can be miniaturized with a simple structure, and power can be generated efficiently.

  That is, according to the power generation device 80, when the bicycle travels and the wheel 85 rotates, the hub 83 rotates around the axle 82 together with the wheel 85, and the rotating plate 88 rotates as the hub 83 rotates. At this time, since the rotating plate 88 is rotated so as to face the plane of the fixed plate 87, the rotating plate 88 can be rotated at a constant interval by the axle 82 with respect to the fixed plate 87 and rotated. An electret film 96 is formed on the first electrode 92 provided on the plate 88, and the electret film 96 of the first electrode 92 and the second electrode 97 provided on the fixed plate 87 relatively rotate and move. The mechanical rotational kinetic energy of the plate 88 can be efficiently converted into electric energy.

For this reason, in this power generation device 80, it is possible to reduce the size of the entire device with a simple structure and to generate power efficiently, and the rotating plate 88 rotates in a non-contact state with respect to the fixed plate 87. Therefore, even if the power generation device 80 is generating power, the bicycle can be run well without imposing a load on the bicycle. In addition, the power generation device 80 includes a storage battery 90 that stores electric charges generated by the relative rotation of the first electrode 92 and the second electrode 97, so that a rotating plate 88 that rotates as the bicycle travels. The electric charge generated between the electret film 96 of the first electrode 92 and the second electrode 97 provided on the fixed plate 87 in accordance with the rotation operation can be stored in the storage battery 90 in a good and reliable manner.

  Further, in the power generation device 80, the transmission unit 100 that transmits electricity generated by the relative rotation of the first electrode 92 and the second electrode 97 as electric energy, and the electricity transmitted by the transmission unit 100 is converted into electric energy. And the receiving unit 103 that receives the power as a power source, the generated electricity can be transmitted to the receiving unit 103 of the lighting device 101 without requiring troublesome wiring. It can be lit well.

(Embodiment 3)
Next, a third embodiment in which the power generation device of the present invention is applied to a bicycle will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 2 shown by FIGS.
As shown in FIGS. 21 and 22, the bicycle power generation device 110 is configured to be externally attached to the bicycle axle 82 and the hub 83, and is otherwise configured in substantially the same manner as in the second embodiment.

That is, as shown in FIG. 22, the power generator 110 includes a fixing plate 111 that is detachably attached to the axle 82 and fixed to the front frame 81, and a hub 83 that is opposed to the fixing plate 111. And a rotating plate 112 attached to the outer side surface. As shown in FIG. 25, the rotating plate 112 is formed in a substantially circular ring shape as a whole.

In this case, as shown in FIG. 22 and FIG. 25, an insertion hole 112a into which the axle 82 is inserted is provided at the center of the rotating plate 112, and at a position located around the insertion hole 112a, A plurality of engagement holes 112b with which the attachment end portions 86a of the spokes 86 are respectively engaged are provided. Thus, the rotating plate 112 is attached to the outer surface of the hub 83 and is configured to rotate together with the hub 83.

Further, as shown in FIGS. 22 and 23, the rotating plate 112 is provided with a first electrode 113 through an insulating film 114. As shown in FIGS. 22 and 25, the insulating film 114 is formed in a ring shape at a position located on the outer peripheral side of the plurality of engagement holes 112b with which the attachment end portions 86a of the spokes 86 are engaged. A first electrode 113 is provided on the insulating film 114.

The first electrode 113 includes a radial portion 115 that is formed radially from the insertion hole 112 a that is the rotation center portion of the rotating plate 112. As shown in FIG. 25, the radial portion 115 has a configuration in which a large number of electrode pieces 115a are radially arranged on a ring-shaped insulating film 114 provided on the rotating plate 112 at regular intervals. That is, in this radial portion 115, a large number of electrode pieces 115a are elongated in the radial direction with a substantially constant width, and adjacent electrode pieces 115a are arranged with a gap of a constant interval.

Further, the radial portion 115 is guided to the side of the insulating film 114 and connected to the hub 83 in a state in which a large number of electrode pieces 115a are all connected at the inner peripheral end and the outer peripheral end. It is electrically connected to the axle 82 by a bearing 84 (see FIG. 18) in the hub 83. Thereby, as shown in FIG. 22, the first electrode 113 is electrically connected to the lighting device 101 by the connection line 117 connected to the contact plate 116 that elastically contacts the end surface of the axle 82.

Further, as shown in FIGS. 22 and 23, each electrode piece 115a of the first electrode 113 is formed with an electret film 96 which is a charge holding body. The electret film 96 is an insulator having a semi-permanent charge, like the power generation device 80 of the second embodiment, and is formed of the same material as the electret film 25 of the first power generation device 16 of the first embodiment.

On the other hand, the fixed plate 111 opposed to the rotating plate 112 is made of an insulating synthetic resin, and as shown in FIGS. 21 and 24, the whole is formed in a substantially disc shape, and the axle 82 is inserted in the center thereof. An attachment hole 111a attached by a nut 82a is provided, and an attachment groove 111b is provided from the outer periphery of the attachment hole 111a to the outer periphery of the fixing plate 11, so that the front frame 81 is attached to the attachment groove 111b. It is configured.

As shown in FIGS. 22 to 24, the fixing plate 111 is provided with a second electrode 120 via an insulating film 121. In this case, as shown in FIG. 23, the insulating film 121 has the same size as that of the first electrode 112 except for the mounting groove 111b at a position corresponding to the movement locus on which the first electrode 113 of the rotating plate 112 rotates. The second electrode 120 is provided on the upper surface of the insulating film 121.

The second electrode 120 is made of a conductive metal and includes a radial portion 122 that is formed radially from the mounting hole 111 a of the axle 82 that is the rotation center portion of the rotating plate 112. As shown in FIG. 24, the radial portion 122 has a configuration in which a large number of electrode pieces 122a are radially arranged on the insulating film 121 provided on the fixed plate 111 at regular intervals.

That is, in the radial portion 122, like the radial portion 115 of the first electrode 113, a large number of electrode pieces 122 a are formed elongated in the radial direction with a substantially constant width, and the electrode pieces 122 a adjacent to each other are formed. They are arranged with gaps at regular intervals. Further, as shown in FIG. 24, the radial portion 122 is connected to the fixing plate 111 as shown in FIG. 22 in a state where a large number of electrode pieces 122a are all connected at the inner and outer peripheral ends. The connection wiring 123 is electrically connected to the lighting device 101.

As a result, when the bicycle runs and the wheel 85 rotates, the power generation device 110 for the bicycle rotates the hub 83 together with the wheel 85 about the axle 82, and the rotating plate 112 moves along with the rotation of the hub 83. Since the first electrode 113 provided on the rotating plate 112 rotates relative to the second electrode 120 provided on the fixed plate 111, the first electrode 113 provided on the rotating plate 112 moves on the electrode pieces 115 a of the first electrode 113. The formed electret film 96 and the many electrode pieces 122a of the second electrode 120 move relatively, and the amount of induced charge between the electret film 96 of the first electrode 113 and the second electrode 120 changes. Therefore, the light source unit 102 of the lighting device 101 is turned on by generating power.

According to such a power generator 110 for a bicycle, the hub 83 of the wheel 85 that is a rotational drive unit that rotationally drives, the disk-shaped rotational plate 112 that rotates by the driving rotation of the hub 83, and the rotational plate 112. A fixed plate 111 fixed to the axle 82 and the front frame 82 and a radial portion 115 formed radially from the insertion hole 112a of the axle 82 which is the rotation center portion of the rotation plate 112. A first electrode 113, a second electrode 120 having a radial portion 122 formed on the fixed plate 111 so as to face the radial portion 115 of the first electrode 113, and a charge holding body provided on the first electrode 113. Since the certain electre and the film 96 are provided, as in the second embodiment, the entire apparatus can be miniaturized with a simple structure, and power can be generated efficiently.

That is, according to the power generation device 110, as in the second embodiment, when the bicycle travels and the wheel 85 rotates, the hub 83 rotates around the axle 82 together with the wheel 85, and with the rotation of the hub 83. When the rotating plate 88 rotates, the rotating plate 112 rotates so as to face the flat surface of the flat fixed plate 111. Therefore, the rotating plate 112 is kept at a fixed interval by the axle 82 with respect to the fixed plate 111. The electret film 96 is formed on the first electrode 113 provided on the rotating plate 112, and the electret film 96 of the first electrode 113 and the second electrode 120 provided on the fixed plate 111 are connected to each other. Since the rotational movement is relatively performed, the mechanical rotational kinetic energy of the rotating plate 112 can be efficiently converted into electric energy.

In this case, the fixed plate 111 is detachably attached to the front frame 81 with its central portion positioned on the axle 82, and the rotating plate 112 has the attachment end portion of the spoke 86 engaged with the engagement hole 112b. The fixing plate 111 can be easily attached to the axle 82 and the front frame 81, and the rotating plate 112 can be easily attached to the hub 83. Can be easily retrofitted to existing bicycles. Further, in this power generation device 110, since the rotating plate 112 rotates in a non-contact state with respect to the fixed plate 111, even if the power generation device 110 is generating power, it does not give a load to the traveling of the bicycle. Bicycle can be run.

In the second and third embodiments described above, the case where the single rotating plates 88 and 112 are configured to face one fixed plate 87 and 111 has been described. As shown in the first modified example, the first electrodes 131 are provided on both surfaces (upper and lower surfaces in FIG. 26) of one rotating plate 130, and a pair of fixed plates 132 are provided to face both surfaces of the rotating plate 130. The second electrode 133 may be provided on the pair of fixing plates 132 so as to face the first electrode 131, respectively. Also in this case, the electret film 96 may be provided on the first electrode 131. If comprised in this way, electric power generation amount can be raised twice compared with the electric power generating apparatuses 80 and 110 of Embodiment 2,3.

Further, the present invention is not limited to this, for example, as in the second modification shown in FIG. 27, the first electrode having one rotating plate 136 facing one fixed plate 135 and the electret film 96 on the facing rotating plate 136. The power generation unit 140 may be configured by providing the first plate 137 with the second electrode 138 facing the first electrode 137 on the fixed plate 135, and a multiple structure in which a plurality of the power generation units 140 are provided on the axle 82 may be employed. . If comprised in this way, the electric power generation amount can be raised several times rather than the electric power generating apparatuses 80 and 110 of Embodiment 2,3.

Further, the present invention is not limited to this, for example, as in the third modification shown in FIG. 28, the first electrode 131 having the electret films 96 is provided on both surfaces (upper and lower surfaces in FIG. 28) of one rotating plate 130, respectively. A pair of fixed plates 132 are provided facing both surfaces of the rotating plate 130, and the second electrode 133 is provided on each of the pair of fixed plates 135 so as to face the first electrode 131, thereby forming the power generation unit 141. A multiple structure in which a plurality of power generation units 141 are provided on the axle 82 may be employed. If comprised in this way, the electric power generation amount can be raised several times compared with the electric power generating apparatuses 80 and 110 of Embodiment 2,3.

Further, in the first to third embodiments and the modifications thereof, the case where the electret films 25, 59, and 96 are provided on the first electrodes 22, 56, 92, 113, 131, and 137 has been described. It is not necessary to provide the electret films 25, 59, 96 on the electrodes 22, 56, 92, 113, 131, 137. Instead of the first electrodes 22, 56, 92, 113, 131, 137, the second electrodes 26, 60, A configuration in which electret films 25, 59, and 96 are provided on 97, 120, 133, and 138 may be employed. Even if comprised in this way, there exists an effect similar to Embodiment 1-3 and each modification.

In addition, in the above-described Embodiments 2 and 3 and their modifications, the case where the power generation devices 80 and 110 are provided on the bicycle axle 82 has been described. However, the bicycle does not necessarily have to be a bicycle. In addition to being applicable to body axles, it can also be widely applied to rotary drive devices that are rotated by external drive means such as windmills and ships.

DESCRIPTION OF SYMBOLS 1 Watch case 6 Watch module 9 Circuit board 11 Watch movement 15 Ground plate 16, 55, 80, 110 1st power generator 17, 88, 112, 130, 136 Rotating plate 18 Fixed shaft 19 Bearing 22, 56, 92, 113, 131 137 First electrode 23, 57, 93, 114 Insulating film 24, 58, 94, 115 of first electrode Radial part 25, 59, 96 of first electrode Electret film 26, 60, 97, 120, 133, 138 First Two electrodes 27, 61, 98, 121 Insulating films 28, 62, 99, 122 of the second electrode Radial part 34 of the second electrode 34 Train wheel receiver 38 Second hand wheel 38a Second hand shaft 55 Second power generator 67, 90 Storage batteries 80, 110 Power generator 81 Front frame 82 Axle 83 Hub 85 Wheels 87, 111, 132, 135 Fixed plate 100 Transmitter 101 Illumination Location 103 receiving section 140, 141 Power unit

Claims (7)

A flat substrate;
A rotating member that rotates to face the plane of the substrate;
A time indicating hand that is rotationally driven by the rotating member;
A first electrode provided with a radiating portion formed radially from the rotation center of the rotating member on the rotating member;
A second electrode provided with a radiation portion formed on the flat substrate so as to face the radiation portion of the first electrode;
A timepiece power generator comprising a charge holding body provided on one of the first electrode and the second electrode. A rotational drive unit for rotational driving;
A disk-shaped rotating member that is rotated by driving of the rotation driving unit;
A flat substrate disposed facing the plane of the rotating member;
A first electrode provided with a radiating portion formed radially from the rotation center of the rotating member on the rotating member;
A second electrode provided with a radiation portion formed on the flat substrate so as to face the radiation portion of the first electrode;
A power generation device comprising a charge holding body provided on one of the first electrode and the second electrode.   The power generation device according to claim 2, further comprising a power storage unit that stores electric charges generated by relative rotation between the first electrode and the second electrode. Transmitting means for transmitting electricity generated by relative rotation between the first electrode and the second electrode as electric energy;
Receiving means for receiving the electricity transmitted by the transmitting means as electric energy;
The power generation device according to claim 2, further comprising: The first electrodes are respectively provided on both surfaces of the rotating member,
The substrate includes a first substrate facing one surface of the rotating member and a second substrate facing the other surface of the rotating member;
5. The second electrode according to claim 2, wherein the second electrode is provided on each of the first and second substrates facing both surfaces of the rotating member so as to face the first electrode. The power generator according to any one of the above. The power generation unit is constituted by the rotary member provided with the first electrode and the flat substrate facing the rotary member, and a plurality of sets of the power generation units are arranged. The power generation device according to claim 5. A power generation device including a power generation device main body attachable to a main body portion including a rotating part,
The power generator main body is:
A flat fixed substrate engaged and fixed to the main body,
A rotating member that is driven to rotate by engaging with the rotating portion in a state of facing the plane of the fixed substrate;
A first electrode provided with a radiating portion radially formed from the rotation center of the rotating member on the rotating member;
A second electrode provided with a radiation portion formed on the fixed substrate so as to face the radiation portion of the first electrode;
A power generation device comprising a charge holding body provided on one of the first electrode and the second electrode.

Images