JP6908559B2 - Electronic device - Google Patents

Description

The present invention relates to an electronic device that wirelessly transmits and receives at least one of a signal and electric power.

Patent Document 1 discloses a device in which a power transmission side coil and a power reception side coil are magnetically coupled to supply electric power from the power transmission side coil to the power reception side coil. In Patent Document 1, a power transmission side coil is formed on one substrate surface of the power transmission side substrate facing the power reception side substrate, and a power transmission side circuit component is mounted on the other substrate surface of the power transmission side substrate. Further, in Patent Document 1, a power receiving side coil is formed by a conductive pattern on one substrate surface of the power receiving side substrate facing the power transmission side substrate, and a power receiving side circuit component is mounted on the other substrate surface of the power receiving side substrate.

International Publication No. 2015/108152

One of the objects of the present invention is to provide an electronic device in which the arrangement of electronic components and coils is different from the conventional arrangement.

The electronic device according to the first aspect of the present disclosure is provided on the first substrate attached to the non-rotating body, the second substrate attached to the rotating body, the first coil provided on the first substrate, and the second substrate. A second coil that is magnetically coupled to the first coil, a first electronic component that is provided on the first substrate and is electrically connected to the first coil, and a second substrate. The first substrate includes a first substrate surface that is at least partially opposed to the second substrate and the first substrate, which includes a second electronic component that is electrically connected to the second coil. It has a second substrate surface facing the side opposite to the substrate surface, and the second substrate faces at least a third substrate surface facing the first substrate and a side opposite to the third substrate surface. A first electronic component arrangement state having a fourth substrate surface and the first electronic component being arranged on the first substrate surface, and a first electronic component arrangement state in which the second electronic component is arranged on the third substrate surface. At least one of the two electronic component arrangement states is satisfied.
According to the electronic device on the first side surface, electronic components can be arranged on at least one of the first substrate surface and the third substrate surface, and at least one of the first substrate surface and the third substrate surface can be effectively used. ..

In the electronic device of the second side surface according to the first side surface, the first substrate surface has a first facing surface facing the second substrate and a first non-facing surface not facing the second substrate. In the first electronic component arrangement state, the first electronic component is arranged on the first non-opposing surface.
According to the electronic device on the second side surface, the space between the first substrate and the second substrate can be narrowed.

In the electronic device on the third side surface according to the first or second side surface, the third substrate surface includes a second facing surface facing the first substrate and a second non-facing surface not facing the first substrate. The second electronic component is arranged on the second non-opposing surface in the second electronic component arrangement state.
According to the electronic device on the third side surface, the space between the first substrate and the second substrate can be narrowed.

The electronic device according to the fourth aspect of the present disclosure is provided on the first substrate attached to the non-rotating body, the second substrate attached to the rotating body, the first coil provided on the first substrate, and the second substrate. A second coil that is magnetically coupled to the first coil, a first electronic component that is provided on the first substrate and is electrically connected to the first coil, and a second substrate. The first electronic component includes a first terminal and a first electronic component body, and includes a second electronic component that is electrically connected to the second coil. Includes a second terminal and a second electronic component body, the first embedded state in which the first coil is at least partially embedded in the first substrate, and the second coil is at least partially embedded in the second substrate. A second embedded state in which the first electronic component body is at least partially embedded in the first substrate, and a second embedded state in which the second electronic component body is at least partially embedded in the second substrate. At least one of the fourth embedded states to be embedded is satisfied.
According to the electronic device on the fourth side, at least a part of at least one of the first coil, the second coil, the first electronic component, and the second electronic component can be protected by the first substrate or the second substrate.

In the electronic device of the fifth side surface according to the fourth side surface, in the first embedded state, the first coil is totally embedded in the first substrate, and in the second embedded state, the second coil is said. It is totally embedded in the second substrate, and in the third embedded state, the first electronic component main body is totally embedded in the first substrate, and in the fourth embedded state, the second electronic component main body is used. Is totally embedded in the second substrate.
According to the electronic device on the fifth side surface, at least one of the first coil, the second coil, the first electronic component, and the second electronic component can be entirely protected by the first substrate or the second substrate.

In the electronic device on the sixth side surface according to the fourth side surface, the first substrate has at least a first substrate surface facing the second substrate and a second substrate surface facing the side opposite to the first substrate surface. The second substrate has, at least partially, a third substrate surface facing the first substrate and a fourth substrate surface facing the side opposite to the third substrate surface.
According to the electronic device on the sixth side surface, since the first substrate and the second substrate are at least partially opposed to each other, the transmission efficiency between the coils is high.

The electronic device according to the seventh aspect of the present disclosure is provided on the first substrate attached to the non-rotating body, the second substrate attached to the rotating body, the first coil provided on the first substrate, and the second substrate. A second coil that is magnetically coupled to the first coil, a first electronic component that is provided on the first substrate and is electrically connected to the first coil, and a second substrate. The first substrate includes a first substrate surface that is at least partially opposed to the second substrate and the first substrate, which includes a second electronic component that is electrically connected to the second coil. It has a second substrate surface facing the side opposite to the substrate surface, and the second substrate faces at least a third substrate surface facing the first substrate and a side opposite to the third substrate surface. A first coil arrangement state having a fourth substrate surface and the first coil being arranged on the second substrate surface, and a second coil arrangement in which the second coil is arranged on the fourth substrate surface. At least one of the states is satisfied.
According to the electronic device on the seventh side surface, the first coil and the second coil do not come into contact with each other.

In the electronic device on the eighth side surface according to the seventh side surface, the first electronic component is provided on the second substrate surface.
According to the electronic device on the eighth side surface, it becomes difficult for the first electronic component to come into contact with the second substrate.

In the electronic device on the ninth side surface according to the seventh or eighth side surface, the second electronic component is provided on the fourth substrate surface.
According to the electronic device on the ninth side surface, it becomes difficult for the second electronic component to come into contact with the first substrate.

In the electronic device on the tenth side surface according to any one of the sixth to nine side surfaces, the first substrate surface is a first facing surface facing the second substrate and a first non-facing surface not facing the second substrate. The first electronic component has a facing surface, and the first electronic component is arranged on the first non-facing surface.
According to the electronic device on the tenth side surface, it becomes difficult for the first electronic component to come into contact with the second substrate.

In the electronic device on the eleventh side surface according to any one of the sixth to ten side surfaces, the third substrate surface is a second facing surface facing the first substrate and a second non-facing surface not facing the first substrate. The second electronic component has a facing surface, and the second electronic component is arranged on the second non-facing surface.
According to the electronic device on the eleventh side surface, it becomes difficult for the second electronic component to come into contact with the first substrate.

In the electronic device on the twelfth side surface according to any one of the first to third side surfaces and the sixth to eleventh side surfaces, the first coil is arranged on the first substrate surface.
According to the electronic device on the twelfth side surface, the distance between the first coil and the second coil can be shortened as compared with the case where the first coil is arranged on the second substrate surface.

In the electronic device on the thirteenth side according to any one of the first to third and sixth to eleventh sides, the second coil is arranged on the third substrate surface.
According to the electronic device on the thirteenth side surface, the distance between the first coil and the second coil can be shortened as compared with the case where the second coil is arranged on the fourth substrate surface.

The electronic device on the fourteenth side according to any one of the first to thirteenth sides further includes a connector provided on the first substrate.
According to the electronic device on the 14th side surface, other electronic components can be connected to the second substrate via the connector.

The electronic device on the fifteenth side according to any one of the first to third and sixth to thirteenth side surfaces further includes a connector provided on the first substrate, and the connector is arranged on the second substrate surface.
According to the electronic device on the fifteenth side surface, it is easy to connect other electronic components on the fourth substrate surface side to the second substrate.

In the electronic device on the 16th side surface according to any one of the 1st to 15th side surfaces, a motor for assisting the propulsion of the human-powered vehicle and a control unit provided on the first substrate for controlling the motor are further added. include.
According to the electronic device on the 16th side, the motor can be controlled.

In the electronic device on the 17th side according to any one of the 1st to 16th sides, the non-rotating body includes a housing, and the first substrate is attached to the housing.
According to the electronic device on the 17th side surface, the position of the first substrate is stable.

The electronic device according to the eighteenth aspect of the present disclosure includes a first substrate attached to the non-rotating body, a second substrate attached to the rotating body, a third substrate electrically connected to the first substrate, and the above. The first coil provided on the first substrate, the second coil provided on the second substrate and magnetically coupled to the first coil, and the first coil provided on the third substrate and electrically connected to the first coil. A first electronic component to be specifically connected and a second electronic component provided on the second substrate and electrically connected to the second coil are included.
According to the electronic device on the 18th side surface, the number of electronic components arranged on the first substrate can be reduced.

In the electronic device on the 19th side surface according to the 18, the first substrate includes a first substrate surface that at least partially faces the second substrate and a second substrate surface that faces the side opposite to the first substrate surface. The third substrate is attached to the surface of the second substrate.
According to the electronic device on the 19th side surface, the degree of freedom in arranging the third substrate with respect to the second substrate is higher than when the third substrate is attached to the first substrate surface.

In the electronic device on the 20th side surface according to the 18, the first substrate has at least a first substrate surface facing the second substrate and a second substrate surface facing the side opposite to the first substrate surface. The third substrate is attached to the surface of the first substrate.
According to the electronic device on the 20th side surface, it becomes easy to arrange other electronic components on the second substrate surface side in the first substrate.

In the electronic device on the 21st side surface according to any one of the 18th to 20th side surfaces, the third substrate is attached to the first substrate by a connector.
According to the electronic device on the 21st side surface, the connection between the first substrate and the third substrate is easy.

In the electronic device on the 22nd side according to any one of the 18th to 21st sides, the non-rotating body includes a housing, and the first substrate and the third substrate are attached to the housing.
According to the electronic device on the 22nd side surface, the positions of the first substrate and the third substrate are stable.

In the electronic device on the 23rd side surface according to any one of the 18th to 22nd side surfaces, a motor that assists the propulsion of the human-powered vehicle and a control unit provided on the third substrate that controls the motor are provided. Including further.
According to the electronic device on the 23rd side surface, the motor can be controlled.

In the electronic device on the 24th side surface according to any one of the 1st to 23rd side surfaces, the rotating body is at least one of a crank arm, a crankshaft, a sensor support member provided on the crankshaft, and a hub body. Including one.
According to the electronic device on the 24th side surface, power is supplied between the first substrate and the crank arm, the crankshaft, the sensor support member provided on the crankshaft, and the second substrate attached to at least one of the hub bodies. And at least one of the communications can be transmitted.

In the electronic device on the 25th side according to any one of the 1st to 24th sides, the first coil transmits electric power to the second coil.
According to the electronic device on the 25th side surface, electric power can be supplied to the second electronic component connected to the second coil.

In the electronic device on the 26th side according to any one of the 1st to 25th sides, the first coil and the second coil transmit and receive communication signals.
According to the electronic device on the 26th side surface, communication can be performed between the first substrate and the second substrate.

In the electronic device on the 27th side surface according to any one of the first to 26th side surfaces, the distance between the first substrate and the second substrate is 0.1 mm or more and less than 2.0 mm.
According to the electronic device on the 27th side surface, the contact between the first substrate and the second substrate can be suppressed, and the magnetic coupling between the first coil and the second coil can be strengthened.

The electronic device on the 28th side according to any one of the 1st to 27th sides further includes a sensor provided on the rotating body and electrically connected to the second electronic component.
According to the electronic device on the 28th side surface, the signal detected by the sensor can be transmitted to the first substrate.

In the electronic device on the 29th side according to the 28th side, the sensor includes a strain sensor that detects the strain of the rotating body.
According to the electronic device on the 29th side surface, information on the distortion of the rotating body can be transmitted to the first substrate.

In the electronic device of the present disclosure, the arrangement of parts and coils is different from the conventional arrangement.

Side view of a human-powered vehicle. Perspective view of the drive unit. Top view of the drive unit. FIG. 3 is a cross-sectional view of the drive unit along the IV-IV line of FIG. A block diagram showing the electrical configuration of a human-powered vehicle. An exploded perspective view of an electronic device. Sectional view of the electronic device. An enlarged view of part A in FIG. The cross-sectional view of the electronic device which concerns on 2nd Embodiment. FIG. 3 is a cross-sectional view of an electronic device according to a third embodiment. FIG. 5 is a cross-sectional view of an example of an electronic device according to a fourth embodiment. FIG. 6 is a cross-sectional view of another example of the electronic device according to the fourth embodiment. FIG. 5 is a cross-sectional view of an example of an electronic device according to a fifth embodiment. FIG. 5 is a cross-sectional view of another example of the electronic device according to the fifth embodiment. FIG. 6 is a cross-sectional view of another example of the electronic device according to the sixth embodiment. FIG. 5 is a cross-sectional view of an electronic device according to a seventh embodiment. FIG. 5 is a cross-sectional view of a first example of the electronic device according to the eighth embodiment. FIG. 2 is a cross-sectional view of a second example of the electronic device according to the eighth embodiment. FIG. 3 is a perspective view of a third example of the electronic device according to the eighth embodiment. FIG. 3 is a cross-sectional view of a third example of the electronic device according to the eighth embodiment.

<First Embodiment>
The electronic device 70 of the embodiment will be described with reference to FIGS. 1 to 8. The electronic device 70 of the embodiment is provided in the human-powered vehicle 10. The human-powered vehicle 10 is a vehicle that can be driven by at least a human-powered driving force. The number of wheels of the human-powered vehicle 10 is not limited, and includes, for example, a one-wheeled vehicle and a vehicle having three or more wheels. The human-powered vehicle 10 includes various types of bicycles such as mountain bikes, road bikes, city bikes, cargo bikes, and recumbent bicycles, as well as electrically power assisted bicycles (E-bikes). Hereinafter, in the embodiment, the human-powered vehicle 10 will be described as a bicycle.

As shown in FIG. 1, the human-powered vehicle 10 has a crank 12. The human-powered vehicle 10 further includes drive wheels 14 and a frame 16. A human-powered driving force is input to the crank 12. The crank 12 includes a crankshaft 12A that can rotate with respect to the frame 16 and crankarms 12B provided at both ends of the crankshaft 12A in the axial direction. A pedal 18 is connected to each crank arm 12B. The drive wheels 14 are driven by the rotation of the crank 12. The drive wheels 14 are supported by the frame 16.

The crank 12 and the drive wheels 14 are connected by a drive mechanism 20. The drive mechanism 20 includes a drive unit 30. The drive unit 30 includes a crankshaft 12A. The first rotating body 22 is coupled to the crankshaft 12A. The crankshaft 12A and the first rotating body 22 may be coupled via a second one-way clutch 42 described later. The second one-way clutch 42 is configured so that the first rotating body 22 is rotated forward when the crank 12 is rotated forward, and the first rotating body 22 is not rotated backward when the crank 12 is rotated backward. The second one-way clutch 42 may be provided in the drive unit 30. The drive mechanism 20 further includes a first rotating body 22, a connecting member 26, and a second rotating body 24. The first rotating body 22 includes a sprocket, a pulley, or a bevel gear. The connecting member 26 transmits the rotational force of the first rotating body 22 to the second rotating body 24. The connecting member 26 includes, for example, a chain, a belt, or a shaft.

The second rotating body 24 is connected to the drive wheels 14. The second rotating body 24 includes a sprocket, a pulley, or a bevel gear. It is preferable that a one-way clutch (not shown) is provided between the second rotating body 24 and the drive wheel 14. The one-way clutch is configured so that the drive wheels 14 are rotated forward when the second rotating body 24 is rotated forward, and the drive wheels 14 are not rotated backward when the second rotating body 24 is rotated backward.

The human-powered vehicle 10 includes front wheels 19A and rear wheels 19B. A front wheel 19A is attached to the frame 16 via a front fork 16A. A handlebar 16C is connected to the front fork 16A via a stem 16B. In the following embodiment, the rear wheel 19B will be described as the drive wheel 14, but the front wheel 19A may be the drive wheel 14.

The drive unit 30 will be described with reference to FIGS. 2 to 4. Section along the line IV-IV of FIG. 3 shown in FIG. 4 includes a rotation axis of the output shaft 32A of the motor 32, the rotation axis of the rotary shaft 50, the rotation axis of the crank shaft 12A, a.

The drive unit 30 includes a motor 32. The motor 32 includes an electric motor. The motor 32 is provided so as to transmit rotation to the power transmission path of the human-powered driving force from the pedal 18 to the drive wheel 14.

The drive unit 30 preferably further includes a crankshaft 12A, a reduction mechanism 34, an output unit 36, a first one-way clutch 40, a second one-way clutch 42, and a control unit 58 (see FIG. 5). The drive unit 30 preferably further includes a housing 46. The housing 46 houses at least a part of the motor 32, a reduction mechanism 34, a first one-way clutch 40, a second one-way clutch 42, and a control unit 58. The housing 46 further accommodates a portion of the crankshaft 12A and the output section 36. The housing 46 is provided with a pair of holes 47A and 47B through which the crankshaft 12A passes. One end of the crankshaft 12A and the output portion 36 are inserted into the one hole 47A. The other end of the crankshaft 12A is inserted into the other hole 47B. The housing 46 includes a first housing 46A and a second housing 46B. The first housing 46A and the second housing 46B are configured to include the side surface portions of the housing 46 in the axial direction of the crankshaft 12A, respectively.

The motor 32 is configured to assist the propulsion of the human-powered vehicle 10. The motor 32 includes an electric motor. The motor 32 may be a so-called brushless motor. The motor 32 is provided so as to transmit rotation to the transmission path of the human-powered driving force from the pedal 18 to the rear wheel 19B. The motor 32 is preferably coupled to a transmission path of human-powered driving force from the crankshaft 12A to the first rotating body 22.

The motor 32 includes an output shaft 32A, a stator 32B, and a rotor 32C. In the present embodiment, the motor 32 is an inner rotor type motor. The rotor 32C is fixed to the output shaft 32A so that the rotation axis of the output shaft 32A is coaxial with the rotation axis of the rotor 32C. The stator 32B is arranged along the circumference centered on the rotation axis of the rotor 32C. The motor 32 is provided in the housing 46 so that the output shaft 32A is parallel to the crankshaft 12A. The housing 46 further includes a motor case 46C that houses a stator 32B and a rotor 32C of the motor 32 and a part of the output shaft 32A. The motor case 46C is fixed to the second housing 46B. The motor case 46C may be integrally formed with the second housing 46B.

The output unit 36 is configured to transmit at least one of the torque of the crankshaft 12A and the torque of the motor 32 to the first rotating body 22. The output unit 36 is a rotating body and has a rotation axis C. Preferably, the first rotating body 22, the crankshaft 12A, and the output unit 36 are provided coaxially. For example, the output unit 36 has a through hole along the rotation axis C, and the crankshaft 12A is inserted through the through hole. The output unit 36 includes a mounting unit 36A to which the first rotating body 22 can be mounted. The mounting portion 36A of the output portion 36 is provided on the outer peripheral surface of the output portion 36. The mounting portion 36A includes a spline. A spline connected to the mounting portion 36A is formed on the inner peripheral portion of the first rotating body 22.

The torque of the crankshaft 12A is transmitted to the output unit 36 via the second one-way clutch 42. The torque of the motor 32 is transmitted to the output unit 36 via the reduction mechanism 34.

The speed reduction mechanism 34 is provided in the internal space of the housing 46. The speed reduction mechanism 34 reduces the rotational speed of the output shaft 32A of the motor 32. The speed reduction mechanism 34 connects the motor 32 and the output unit 36. The speed reduction mechanism 34 decelerates the rotation of the motor 32 and transmits it to the output unit 36. The speed reduction mechanism 34 includes a plurality of gears 48. The plurality of gears 48 include a first gear 48A, a second gear 48B, a third gear 48C, and a fourth gear 48D. The speed reduction mechanism 34 further includes a rotation shaft 50.

The rotating shaft 50 is parallel to the output shaft 32A and the crankshaft 12A of the motor 32. One axial end of the rotating shaft 50 is supported by the first housing 46A. The first housing 46A rotatably supports the rotating shaft 50 via bearings. The other axial end of the rotating shaft 50 is supported by the second housing 46B.

The first gear 48A is provided on the outer peripheral portion of the output shaft 32A of the motor 32. In one example, the first gear 48A is formed integrally with the output shaft 32A. The first gear 48A may be formed separately from the output shaft 32A and attached to the output shaft 32A.

The second gear 48B is provided on the outer peripheral portion of the rotating shaft 50. The second gear 48B is meshed with the first gear 48A. The second gear 48B is formed separately from the rotating shaft 50 and attached to the rotating shaft 50. A first one-way clutch 40 is provided between the second gear 48B and the rotating shaft 50. The first one-way clutch 40 transmits the rotation in the first direction input from the motor 32 to the second gear 48B to the rotation shaft 50, and the rotation in the first direction input from the output unit 36 to the rotation shaft 50 is second. It does not transmit to the gear 48B and the motor 32. The first direction is the direction in which the rotating shaft 50 rotates when the motor 32 rotates the output shaft 32A in order to advance the human-powered vehicle 10. The first one-way clutch 40 includes, for example, a roller clutch. A part of the first one-way clutch 40 may be integrally formed with a part of the second gear 48B and the rotating shaft 50.

The third gear 48C is provided at a portion of the outer peripheral portion of the rotating shaft 50 that is different from the second gear 48B. The third gear 48C rotates integrally with the rotating shaft 50. In one example, the third gear 48C is formed integrally with the rotating shaft 50. The third gear 48C may be formed separately from the rotating shaft 50 and attached to the rotating shaft 50.

The fourth gear 48D is provided on the outer peripheral portion of the output unit 36. The fourth gear 48D rotates integrally with the output unit 36. The fourth gear 48D is meshed with the third gear 48C. The fourth gear 48D and the output unit 36 are connected to the crankshaft 12A via the second one-way clutch 42. The second one-way clutch 42 transmits the rotation of the crankshaft 12A in the second direction to the fourth gear 48D, and does not transmit the rotation of the output unit 36 in the second direction to the crankshaft 12A. The second direction is the direction in which the output unit 36 rotates when the crankshaft 12A is rotated to advance the human-powered vehicle 10. The second one-way clutch 42 includes, for example, a ratchet type clutch having a claw or a roller clutch. The rotation of the crankshaft 12A and the rotation of the motor 32 are transmitted to the fourth gear 48D and the output unit 36.
The crankshaft 12A is provided with a tubular sleeve member 52. The sleeve member 52 is connected to the crankshaft 12A. The sleeve member 52 is coaxially attached to the crankshaft 12A in the housing 46. The sleeve member 52 has a first end portion and a second end portion in the axial direction of the crankshaft 12A. The first end of the sleeve member 52 is fixed to the crankshaft 12A. The second end portion of the sleeve member 52 is connected to the output portion 36 via the second one-way clutch 42. A part of the sleeve member 52 may be integrally formed with a part of the second one-way clutch 42. A part of the output unit 36 may be formed integrally with a part of the second one-way clutch 42. The second one-way clutch 42 may be omitted. In this case, the sleeve member 52 and the output unit 36 may be integrally formed.

As shown in FIGS. 1 and 5, the human-powered vehicle 10 further includes a battery 28 and a control device 56. The battery 28 includes one or more battery cells. The battery cell includes a rechargeable battery. The battery 28 is provided in the human-powered vehicle 10 and supplies electric power to other devices that are electrically connected to the battery 28 by wire, such as a motor 32 and a control device 56. The battery 28 is wirelessly or wiredly connected to the control unit 58 of the control device 56, which will be described later. The battery 28 can communicate with the control unit 58 by, for example, power line communication (PLC). The battery 28 may be mounted outside the frame 16 or at least partly housed inside the frame 16.

The control unit 58 controls the electric power supplied from the battery 28 to the motor 32. The control unit 58 is communicably connected to the control unit 58 of the control device 56 by wire or wirelessly. The control unit 58 can communicate with the control unit 58 by, for example, serial communication. The control unit 58 drives the motor 32 in response to a control signal from the control unit 58. The control unit 58 may include an inverter circuit. The housing 46 is provided with a third substrate 104. The third substrate 104 is housed in the housing 46. The third board 104 includes a printed wiring board.

The control device 56 includes a control unit 58. In one example, the control device 56 further includes a storage unit 60. The control unit 58 includes an arithmetic processing unit that executes a predetermined control program. The arithmetic processing unit includes, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 58 may include one or more microcomputers. The storage unit 60 stores various control programs and information used for various control processes. The storage unit 60 includes, for example, a non-volatile memory and a volatile memory. The control unit 58 and the storage unit 60 are provided in, for example, the housing 46. In the present embodiment, the crank rotation sensor 62, the vehicle speed sensor 64, and the human power sensor 66 for detecting the human power driving force are connected to the control device 56 by wire or wirelessly. In the present embodiment, the control unit 58 and the storage unit 60 of the control device 56 are provided on the third substrate 104.

The crank rotation sensor 62 is used to detect the rotation speed of the crank 12. The crank rotation sensor 62 is attached to the frame 16 or the housing 46 of the human-powered vehicle 10. The crank rotation sensor 62 includes a magnetic sensor that outputs a signal according to the strength of the magnetic field. An annular magnet whose magnetic field strength changes in the circumferential direction is provided in the crankshaft 12A or the power transmission path between the crankshaft 12A and the first rotating body 22. The crank rotation sensor 62 is communicably connected to the control unit 58 by wire or wirelessly. The crank rotation sensor 62 outputs a signal corresponding to the rotation speed of the crank 12 to the control unit 58.

The crank rotation sensor 62 may be provided on a member that rotates integrally with the crankshaft 12A in the power transmission path of the human-powered driving force from the crankshaft 12A to the first rotating body 22. For example, the crank rotation sensor 62 may be provided on the first rotating body 22 when the second one-way clutch 42 is not provided between the crankshaft 12A and the first rotating body 22. The crank rotation sensor 62 may be omitted.

The vehicle speed sensor 64 is used to detect the rotational speed of the wheels. The vehicle speed sensor 64 is electrically connected to the control unit 58 by wire or wirelessly. The vehicle speed sensor 64 is communicably connected to the control unit 58 by wire or wirelessly. The vehicle speed sensor 64 outputs a signal corresponding to the rotation speed of the wheels to the control unit 58. The control unit 58 calculates the vehicle speed of the human-powered vehicle 10 based on the rotation speed of the wheels. The control unit 58 stops the motor 32 when the vehicle speed exceeds a predetermined value. The predetermined value is, for example, 25 km / h or 45 km / h. The vehicle speed sensor 64 preferably includes a magnetic lead or a Hall element that constitutes a reed switch. The vehicle speed sensor 64 may be attached to the chain stay of the frame 16 and detect a magnet attached to the rear wheel 19B, or may be provided on the front fork 16A and detect a magnet attached to the front wheel 19A.

The human power sensor 66 is used to detect the human power driving force input to the crank 12. In this embodiment, the human power sensor 66 is provided on the crankshaft 12A. The human power sensor 66 is provided on the sleeve member 52, for example, and is provided on the crankshaft 12A via the sleeve member 52. The human power sensor 66 is provided on the outer peripheral portion of the sleeve member 52. The human power sensor 66 includes a strain sensor 66A. The strain sensor 66A includes a strain gauge and a semiconductor strain sensor. Electric power is supplied to the human power sensor 66 via the electronic device 70. The human power sensor 66 communicates with the control unit 58 via the electronic device 70. The human power sensor 66 can detect the human power torque.

The control unit 58 controls the motor 32. The control unit 58 changes, for example, the ratio of the assist force by the motor 32 to the human-powered driving force input to the crank 12 according to the human-powered driving force. Hereinafter, the ratio of the assist force by the motor 32 to the human-powered driving force input to the crank 12 will be referred to as an assist ratio. The control unit 58 changes the assist ratio according to the human-powered driving force and the rotation speed of the crank 12. The assist ratio may be the ratio of the torque of the assist force by the motor 32 to the human torque of the human power drive force input to the human power drive vehicle 10. The assist ratio may be the ratio of the power work rate (watt) of the assist force by the motor 32 to the power work rate (watt) of the human power drive force input to the human power drive vehicle 10. The power of the human-powered driving force is calculated by multiplying the torque of the human-powered driving force input to the crank 12 by the rotational speed of the crank 12. When the output of the motor 32 is input to the power transmission path of the human-powered driving force via the speed reducer, the output of the speed reducer is used as the assist force by the motor 32.

The electronic device 70 provided in the human-powered vehicle 10 will be described with reference to FIGS. 6 to 8. FIG. 7 is a cross-sectional view of the electronic device 70. FIG. 8 is an enlarged view of part A in FIG. The electronic device 70 is housed in a housing 46. The electronic device 70 is provided on the first substrate 72 attached to the non-rotating body NR, the second substrate 74 attached to the rotating body RT, the first coil 76 provided on the first substrate 72, and the second substrate 74. , A second coil 78 that is magnetically coupled to the first coil 76, a first electronic component 80 that is provided on the first substrate 72 and is electrically connected to the first coil 76, and a second substrate 74. It includes a second electronic component 82 that is provided and electrically connected to the second coil 78. The first substrate 72 has a first substrate surface 84 that at least partially faces the second substrate 74, and a second substrate surface 86 that faces the opposite side of the first substrate surface 84. The second substrate 74 has a third substrate surface 88 that at least partially faces the first substrate 72, and a fourth substrate surface 90 that faces the side opposite to the third substrate surface 88. In the electronic device 70, the first electronic component arrangement state in which the first electronic component 80 is arranged on the first substrate surface 84 and the second electronic component arrangement state in which the second electronic component 82 is arranged on the third substrate surface 88. , At least one of them is satisfied.

The electronic device 70 receives signals and electric power from the first substrate 72 to the second substrate 74 or from the second substrate 74 to the first substrate 72 by magnetically coupling the first coil 76 and the second coil 78. You can send at least one of them. In the present embodiment, the first coil 76 is provided on the first substrate surface 84, and the second coil 78 is provided on the third substrate surface 88. In this embodiment, the first electronic component 80 is arranged on the first substrate surface 84. In this embodiment, the second electronic component 82 is provided on the fourth substrate surface 90.

The first substrate 72 and the second substrate 74 include an insulating layer formed of a resin. The resin includes at least one of an epoxy resin, a glass epoxy resin, a phenol resin, a paper phenol resin, a paper epoxy resin, a polyimide resin, and a fluorine resin. In this embodiment, the first substrate 72 and the second substrate 74 include a printed wiring board.

The first substrate surface 84 and the second substrate surface 86 of the first substrate 72 include the surface of the insulating layer forming the first substrate 72, and do not include the sealing resin layer. The third substrate surface 88 and the fourth substrate surface 90 of the second substrate 74 include the surface of the insulating layer forming the second substrate 74, and do not include the sealing resin layer.

The shape of the first substrate 72 is not limited. The shape of the first substrate 72 is formed on the second substrate 74 and the second substrate 74 according to the relationship with surrounding components. For example, when the second substrate 74 is arranged in the intermediate portion in the axial direction of the rotating body RT, the rotating body RT is provided on the first substrate 72 so that the first substrate 72 can be arranged near the second substrate 74. A hole 72A for insertion is provided. The conducting wire of the first coil 76 is arranged so as to surround the rotating body RT around the rotation axis of the rotating body RT.

The shape of the second substrate 74 is not limited. The shape of the second substrate 74 is formed according to the arrangement relationship with the rotating body RT. For example, when the second substrate 74 is arranged at an intermediate portion in the axial direction of the rotating body RT, the second substrate 74 is provided with a hole 74A through which the rotating body RT is inserted. The conducting wire of the second coil 78 is arranged so as to surround the rotating body RT around the rotation axis of the rotating body RT.

The second substrate 74 is attached to the rotating body RT via the substrate support member 12D. The substrate support member 12D includes a fixing portion 12E fixed to the rotating body RT and a supporting portion 12F extending from the fixing portion 12E to support the second substrate 74. The substrate support member 12D is formed of a material that transmits electromagnetic waves, for example, a synthetic resin. A part of the substrate support member 12D may be arranged between the first coil 76 and the second coil 78.

The rotating body RT includes at least one of a crank arm 12B, a crankshaft 12A, a sensor support member 12C provided on the crankshaft 12A, and a hub body 25. In the present embodiment, the rotating body RT is the sensor support member 12C, and the non-rotating body NR is the housing 46. In this embodiment, the sleeve member 52 includes a sensor support member 12C. The hub body 25 is provided at the center of rotation of the wheel.

In the present embodiment, the first coil 76 is configured to transmit electric power to the second coil 78. For example, the power supply driver 92 is connected to the first coil 76. The power supply driver 92 supplies power to the first coil 76. The first coil 76 transmits electric power to the second coil 78 by electromagnetic induction or resonance. The power supply driver 92 is an example of the first electronic component 80. A rectifier circuit 94 and a power supply circuit 96 are connected to the second coil 78. The electric power formed by the power supply circuit 96 is supplied to the human power sensor 66. The rectifier circuit 94 and the power supply circuit 96 are examples of the second electronic component 82.

As an example, the first coil 76 may include a main coil and a resonance coil that can resonate with the main coil. The resonance coil has a common center with the center of the main coil. The resonance coil resonates with the main coil. The main coil is supplied with electric power having a specific frequency such that the resonance coil resonates. The second coil 78 receives electric power from the resonance coil.

In the present embodiment, the first coil 76 and the second coil 78 are configured to transmit and receive communication signals. For example, a communication signal is sent from the second coil 78 to the first coil 76. The communication signal is a signal including information regarding the state of the rotating body RT. A modulation circuit 98 is connected to the second coil 78. The modulation circuit 98 changes the vibration of the reflected wave of the carrier wave based on the communication signal. The modulation circuit 98 superimposes a communication signal on the reflected wave with respect to the carrier wave when the first coil 76 and the second coil 78 are magnetically coupled. The modulation circuit 98 changes the impedance of the circuit including the second coil 78 according to the communication signal. In this way, the communication signal is superimposed on the reflected wave. The modulation circuit 98 is an example of the second electronic component 82. A demodulation circuit 100 is connected to the first coil 76. The demodulation circuit 100 demodulates the reflected wave received by the first coil 76 and extracts the communication signal superimposed on the reflected wave. The demodulation circuit 100 is an example of the first electronic component 80. The information regarding the state of the rotating body RT includes the information detected by the human power sensor 66 in the present embodiment.

Preferably, the distance between the first substrate 72 and the second substrate 74 is 0.1 mm or more and less than 2.0 mm. By setting the distance between the first substrate 72 and the second substrate 74 to 0.1 mm or more, contact between the first substrate 72 and the second substrate 74 can be prevented. By setting the distance between the first substrate 72 and the second substrate 74 to less than 2.0 mm, the electric power required for transmitting signals and electric power can be suppressed.

Electronic device 70 is provided on the rotating body RT, it may further include a sensor SN, which is electrically connected second to the electronic component 82. For example, the sensor SN is used to detect the state of the rotating body RT. The state of the rotating body RT includes at least one of a state of distortion around the rotation axis of the rotating body RT due to a force applied to the rotating body RT and a state of rotation of the rotating body RT. The rotational state of the rotating body RT includes a rotational speed and a rotational acceleration. In the present embodiment, the sensor SN is a human-powered sensor 66, and the sensor SN includes a strain sensor 66A that detects the strain of the rotating body RT. The amount of distortion of the rotating body RT changes according to the force applied to the rotating body RT in the direction along the circle centered on the center of rotation. By detecting the strain of the rotating body RT with the strain sensor 66A, the torque applied to the rotating body RT can be detected. The first substrate 72 may be provided with an AD conversion unit that converts a signal from the distortion sensor 66A into a digital signal. The communication signal transmitted from the second coil 78 to the first coil 76 may be a digital signal or an analog signal.

The electronic device 70 may further include a connector 102 provided on the first substrate 72. The connector 102 is electrically connected to at least one of the first electronic component 80 and the first coil 76. The connector 102 is configured to connect the second substrate 74 and other electronic components. Other electronic components include substrates, electrical cables, wire harnesses, and flexible substrates. In the present embodiment, the connector 102 is connected to an electric cable that is electrically connected to the third substrate 104, and is electrically connected to the control unit 58. The connector 102 may be arranged on the second substrate surface 86.

In the present embodiment, the control unit 58 is provided on the third substrate 104, but the control unit 58 may be provided on the first substrate 72. The storage unit 60 may also be provided on the first substrate 72. When the control unit 58 and the storage unit 60 are provided on the first board 72, the third board 104 and the connector 102 can be omitted. In the present embodiment, the electronic device 70 does not include the motor 32 and the control unit 58, but the electronic device 70 includes a motor 32 that assists the propulsion of the human-powered vehicle 10 and a motor 32 provided on the first substrate 72. A control unit 58 for controlling may be further included.

In this embodiment, the non-rotating body NR includes a housing 46. The first substrate 72 is attached to the housing 46. The non-rotating body NR may be a component other than the housing 46. For example, when the frame 16 is inserted into the housing 46, the non-rotating body NR may include the frame 16. In this case, the first substrate 72 is attached to the frame 16.

<Second Embodiment>
The electronic device 70 according to the second embodiment will be described with reference to FIG. The description of the configuration common to the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described. The same reference numerals are given to the configurations common to those of the first embodiment. The electronic device 70 according to the second embodiment is different from the electronic device 70 according to the first embodiment in the following points.

The first substrate surface 84 of the first substrate 72 has a first facing surface 84A facing the second substrate 74 and a first non-facing surface 84B not facing the second substrate 74. In the first electronic component arrangement state, the first electronic component 80 is arranged on the first non-opposing surface 84B. In this case, the other first electronic component 80 may not be arranged on the second substrate surface 86.

<Third Embodiment>
The electronic device 70 according to the third embodiment will be described with reference to FIG. The description of the configuration common to the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described. The same reference numerals are given to the configurations common to those of the first embodiment. The electronic device 70 according to the third embodiment is different from the electronic device 70 according to the first embodiment in the following points.
The third substrate surface 88 of the second substrate 74 has a second facing surface 88A facing the first substrate 72 and a second non-facing surface 88B not facing the first substrate 72. In the second electronic component arrangement state, the second electronic component 82 is arranged on the second non-opposing surface 88B. In this case, the other second electronic component 82 may not be arranged on the fourth substrate surface 90.

<Fourth Embodiment>
The electronic device 70 according to the fourth embodiment will be described with reference to FIG. The description of the configuration common to the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described. The same reference numerals are given to the configurations common to those of the first embodiment.

The electronic device 70 is provided on the first substrate 72 attached to the non-rotating body NR, the second substrate 74 attached to the rotating body RT, the first coil 76 provided on the first substrate 72, and the second substrate 74. , A second coil 78 that is magnetically coupled to the first coil 76, a first electronic component 80 that is provided on the first substrate 72 and is electrically connected to the first coil 76, and a second substrate 74. It includes a second electronic component 82 that is provided and electrically connected to the second coil 78. The first electronic component 80 includes a first terminal 80A and a first electronic component main body 80B. The second electronic component 82 includes a second terminal 82A and a second electronic component main body 82B. The first embedded state in which the first coil 76 is at least partially embedded in the first substrate 72, the second embedded state in which the second coil 78 is at least partially embedded in the second substrate 74, and the first electronic component body 80B. At least one of a third embedded state in which is at least partially embedded in the first substrate 72 and a fourth embedded state in which the second electronic component body 82B is at least partially embedded in the second substrate 74 is satisfied. ..

According to the above configuration, at least one of at least a part of the first coil 76, at least a part of the second coil 78, at least a part of the first electronic component body 80B, and at least a part of the second electronic component body 82B , Embedded in the first substrate 72 or the second substrate 74.

The first electronic component main body 80B includes a portion of the first electronic component 80 other than the first terminal 80A. The second electronic component main body 82B includes a portion of the second electronic component 82 other than the second terminal 82A. For example, as shown in FIG. 11, the second coil 78 is embedded in the second substrate 74.

As shown in FIG. 12, it may be configured as follows. In the first embedded state, the first coil 76 is totally embedded in the first substrate 72. In the second embedded state, the second coil 78 is totally embedded in the second substrate 74. In the third embedded state, the first electronic component main body 80B is totally embedded in the first substrate 72. In the fourth embedded state, the second electronic component main body 82B is totally embedded in the second substrate 74.

<Fifth Embodiment>
The electronic device 70 according to the sixth embodiment will be described with reference to FIGS. 13 and 14. The description of the configuration common to the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described. The same reference numerals are given to the configurations common to those of the first embodiment.

The electronic device 70 is provided on the first substrate 72 attached to the non-rotating body NR, the second substrate 74 attached to the rotating body RT, the first coil 76 provided on the first substrate 72, and the second substrate 74. , A second coil 78 that is magnetically coupled to the first coil 76, a first electronic component 80 that is provided on the first substrate 72 and is electrically connected to the first coil 76, and a second substrate 74. It includes a second electronic component 82 that is provided and electrically connected to the second coil 78. The first substrate 72 has a first substrate surface 84 that at least partially faces the second substrate 74, and a second substrate surface 86 that faces the side opposite to the first substrate surface 84. The second substrate 74 has a third substrate surface 88 that at least partially faces the first substrate 72, and a fourth substrate surface 90 that faces the side opposite to the third substrate surface 88. At least one of a first coil arrangement state in which the first coil 76 is arranged on the second substrate surface 86 and a second coil arrangement state in which the second coil 78 is arranged on the fourth substrate surface 90 is satisfied.

As shown in FIG. 13, the first coil 76 is arranged on the first substrate surface 84. The second coil 78 is arranged on the fourth substrate surface 90. In this case, the first electronic component 80 may be provided on the second substrate surface 86. The second electronic component 82 may be provided on the fourth substrate surface 90.

As shown in FIG. 14, in another example, the second coil 78 is arranged on the third substrate surface 88. The first coil 76 is arranged on the second substrate surface 86. In this case, the first electronic component 80 may be provided on the second substrate surface 86. The second electronic component 82 may be provided on the fourth substrate surface 90.

<Sixth Embodiment>
The electronic device 70 according to the sixth embodiment will be described with reference to FIG. The fifth embodiment can be modified as follows. The first substrate surface 84 has a first facing surface 84A facing the second substrate 74 and a first non-facing surface 84B not facing the second substrate 74. The first electronic component 80 is arranged on the first non-opposing surface 84B.

<7th Embodiment>
The electronic device 70 according to the seventh embodiment will be described with reference to FIG. The fifth embodiment can be modified as follows. The third substrate surface 88 has a second facing surface 88A facing the first substrate 72 and a second non-facing surface 88B not facing the first substrate 72. The second electronic component 82 is arranged on the second non-opposing surface 88B.

<8th Embodiment>
The electronic device 70 according to the eighth embodiment will be described with reference to FIGS. 17 to 20. The description of the configuration common to the first embodiment will be omitted, and the configuration different from that of the first embodiment will be described. The same reference numerals are given to the configurations common to those of the first embodiment.

The electronic device 70 includes a first substrate 72 attached to the non-rotating body NR, a second substrate 74 attached to the rotating body RT, a third substrate 104 electrically connected to the first substrate 72, and a first. The first coil 76 provided on the substrate 72, the second coil 78 provided on the second substrate 74 and magnetically coupled to the first coil 76, and the first coil 76 provided on the third substrate 104 and on the first coil 76. It includes a first electronic component 80 that is electrically connected and a second electronic component 82 that is provided on the second substrate 74 and is electrically connected to the second coil 78.

The first electronic component 80 provided on the third substrate 104 includes a power supply driver 92 and a demodulation circuit 100. The second electronic component 82 provided on the second substrate 74 includes a rectifier circuit 94, a power supply circuit 96, and a modulation circuit 98.

As shown in FIG. 17, the first substrate 72 has a first substrate surface 84 that at least partially faces the second substrate 74 and a second substrate surface 86 that faces the opposite side of the first substrate surface 84. Have. The third substrate 104 may be attached to the second substrate surface 86.

Further, as shown in FIG. 18, in the first substrate 72, the first substrate surface 84 has a first facing surface 84A facing the second substrate 74 and a first non-facing surface 84B not facing the second substrate 74. And have. The third substrate 104 may be attached to a portion of the second substrate surface 86 opposite to the first non-opposing surface 84B.

The third board 104 is attached to the first board 72 by the connector 106. Connector 106 includes connector having Ha harness, connector mechanically terminals are have a bayonet structure is coupled, and by solder or conductive adhesive has a terminal connector that is terminals of coupled.

As shown in FIGS. 19 and 20, the arrangement of the third substrate 104 can be changed as follows. The first substrate 72 has a first substrate surface 84 that at least partially faces the second substrate 74, and a second substrate surface 86 that faces the opposite side of the first substrate surface 84. The third substrate 104 is attached to the first substrate surface 84.

As shown in FIG. 19, the non-rotating body NR includes a housing 46. The first substrate 72 and the third substrate 104 may be attached to the housing 46. Further, the electronic device 70 may further include a motor 32 that assists the propulsion of the human-powered vehicle 10 and a control unit 58 that is provided on the third substrate 104 and controls the motor 32.

Regarding the electronic devices 70 of the first to eighth embodiments, the arrangement of the first coil 76 on the first substrate 72, the arrangement of the first electronic component 80 on the first substrate 72, and the arrangement of the second coil on the second substrate 74. The combination patterns of the arrangement of 78 and the arrangement of the second electronic component 82 on the second substrate 74 are summarized in Tables 1 to 4. Tables 1 to 4 are examples when the electronic device 70 does not include the third substrate 104, and Table 5 is an example when the electronic device 70 includes the third substrate 104. Each pattern corresponds to at least one of the electronic devices 70 of the first to eighth embodiments.

(Modification example)
The description of the embodiment is an example of the embodiment according to the electronic device 70 according to the present disclosure, and is not intended to limit the embodiment. The electronic device 70 according to the present disclosure may take, for example, a modification of the embodiment shown below and a combination of at least two modifications that are consistent with each other.

In each embodiment, the first substrate 72 may be composed of a plurality of substrates. The second substrate 74 may be composed of a plurality of substrates.

The signal transmission may be performed by a device other than the electronic device 70. For example, an electromagnetic wave transmitting device is provided on the second substrate 74 or the rotating body RT, and an electromagnetic wave receiving device is provided in the housing 46.

The electric power may be transmitted by a device other than the electronic device 70. For example, the rotating body RT may be provided with a power generation device that generates power based on the rotation of the rotating body RT. In this case, the sensor SN and the electronic device 70 operate with the electric power of the power generation device.

NR ... non-rotating body, RT ... rotating body, SN ... sensor, 10 ... human-powered vehicle, 12A ... crank shaft, 12B ... crank arm, 12C ... sensor support member, 25 ... hub body, 32 ... motor, 46 ... housing, 66A ... distortion sensor, 70 ... electronic device, 72 ... first board, 74 ... second board, 76 ... first coil, 78 ... second coil, 80 ... first electronic component, 80A ... first terminal, 80B ... first 1 Electronic component main body, 82 ... 2nd electronic component, 82A ... 2nd terminal, 82B ... 2nd electronic component main body, 84 ... 1st substrate surface, 84A ... 1st facing surface, 84B ... 1st non-facing surface, 86 ... 2nd substrate surface, 88 ... 3rd substrate surface, 88A ... 2nd facing surface, 88B ... 2nd non-opposing surface, 90 ... 4th substrate surface, 102 ... Connector, 104 ... 3rd substrate, 106 ... Connector.

Claims (33)

The first board attached to the non-rotating body and
The second board attached to the rotating body and
The first coil provided on the first substrate and
A second coil provided on the second substrate and magnetically coupled to the first coil,
A first electronic component provided on the first substrate and electrically connected to the first coil.
A second electronic component provided on the second substrate and electrically connected to the second coil is included.
The first substrate has, at least partially, a first substrate surface facing the second substrate in the direction of the rotation axis of the rotating body, and a second substrate surface facing the side opposite to the first substrate surface. ,
The second substrate has, at least partially, a third substrate surface facing the first substrate and a fourth substrate surface facing the side opposite to the third substrate surface.
The first electronic component placement state of the first electronic component is disposed on the first substrate surface is filled,
The first substrate surface has a first facing surface facing the second substrate and a first non-facing surface not facing the second substrate.
In the first electronic component arrangement state, the first electronic component is arranged on the first non-opposing surface, and is arranged outside the radial direction of the first coil in the radial direction of the rotating body. Electronic device. Before Stories second electronic component is Tasa second electronic component arrangement GaMitsuru disposed on the third substrate surface, the electronic device according to claim 1. The third substrate surface has a second facing surface facing the first substrate and a second non-facing surface not facing the first substrate.
In the second electronic component arrangement, the second electronic component is disposed on the second non-facing surface, the electronic device according to claim 2. The first board attached to the non-rotating body and
The second board attached to the rotating body and
The first coil provided on the first substrate and
A second coil provided on the second substrate and magnetically coupled to the first coil,
A first electronic component provided on the first substrate and electrically connected to the first coil.
A second electronic component provided on the second substrate and electrically connected to the second coil is included.
The first substrate has, at least partially, a first substrate surface facing the second substrate and a second substrate surface facing the opposite side of the first substrate surface.
The second substrate has, at least partially, a third substrate surface facing the first substrate and a fourth substrate surface facing the side opposite to the third substrate surface.
The second electronic component arrangement state in which the second electronic component is arranged on the third substrate surface is satisfied.
The third substrate surface has a second facing surface facing the first substrate and a second non-facing surface not facing the first substrate.
In the second electronic component arrangement state, the second electronic component is arranged on the second non-opposing surface, and is arranged outside the radial direction of the second coil in the radial direction of the rotating body. Electronic device. The electronic device according to claim 4, wherein the first electronic component arrangement state in which the first electronic component is arranged on the first substrate surface is satisfied. The first substrate surface has a first facing surface facing the second substrate and a first non-facing surface not facing the second substrate.
The electronic device according to claim 5 , wherein in the first electronic component arrangement state, the first electronic component is arranged on the first non-opposing surface. The first board attached to the non-rotating body and
The second board attached to the rotating body and
The first coil provided on the first substrate and
A second coil provided on the second substrate and magnetically coupled to the first coil,
A first electronic component provided on the first substrate and electrically connected to the first coil.
A second electronic component provided on the second substrate and electrically connected to the second coil is included.
The first electronic component includes a first terminal and a first electronic component body.
The second electronic component includes a second terminal and a second electronic component body.
First embedded state in which the first coil is at least partially embedded in the first substrate, and at least one second Umakomijo state where the second coil is at least partially embedded in the second substrate An electronic device to be filled. The first embedded state, the second embedded state, the third embedded state in which the first electronic component body is at least partially embedded in the first substrate, and the second electronic component body is the second. The electronic device according to claim 7, wherein at least one of the fourth embedded states, which is at least partially embedded in the substrate, is satisfied. In the first embedded state, the first coil is totally embedded in the first substrate,
In the second embedded state, the second coil is totally embedded in the second substrate,
In the third embedded state, the first electronic component body is entirely embedded in the first substrate.
The electronic device according to claim 8 , wherein in the fourth embedded state, the second electronic component body is entirely embedded in the second substrate. The first substrate has, at least partially, a first substrate surface facing the second substrate and a second substrate surface facing the opposite side of the first substrate surface.
7. Electronic device. The first board attached to the non-rotating body and
The second board attached to the rotating body and
The first coil provided on the first substrate and
A second coil provided on the second substrate and magnetically coupled to the first coil,
A first electronic component provided on the first substrate and electrically connected to the first coil.
A second electronic component provided on the second substrate and electrically connected to the second coil is included.
The first substrate has, at least partially, a first substrate surface facing the second substrate and a second substrate surface facing the opposite side of the first substrate surface.
The second substrate has, at least partially, a third substrate surface facing the first substrate and a fourth substrate surface facing the side opposite to the third substrate surface.
The first coil arrangement state in which the first coil is arranged only on the second substrate surface of the first substrate surface and the second substrate surface, and the second coil is on the third substrate surface and the second substrate surface. An electronic device that satisfies at least one of the second coil arrangement states arranged only on the fourth substrate surface of the four substrate surfaces. The electronic device according to claim 11 , wherein the first electronic component is provided on the second substrate surface. The electronic device according to claim 11 or 12 , wherein the second electronic component is provided on the fourth substrate surface. The first substrate surface has a first facing surface facing the second substrate and a first non-facing surface not facing the second substrate.
The electronic device according to any one of claims 10 to 13 , wherein the first electronic component is arranged on the first non-opposing surface. The third substrate surface has a second facing surface facing the first substrate and a second non-facing surface not facing the first substrate.
The electronic device according to any one of claims 10 to 14 , wherein the second electronic component is arranged on the second non-opposing surface. The electronic device according to any one of claims 1 to 6 and 10 to 15 , wherein the first coil is arranged on the first substrate surface. The electronic device according to any one of claims 1 to 6 and 10 to 15 , wherein the second coil is arranged on the third substrate surface. The electronic device according to any one of claims 1 to 17 , further comprising a connector provided on the first substrate. Further including a connector provided on the first substrate,
The electronic device according to any one of claims 1 to 6 and 10 to 17 , wherein the connector is arranged on the second substrate surface. Motors that assist the propulsion of human-powered vehicles and
The electronic device according to any one of claims 1 to 19 , further comprising a control unit provided on the first substrate and controlling the motor. The non-rotating body includes a housing.
The electronic device according to any one of claims 1 to 20 , wherein the first substrate is attached to the housing. A third substrate that is electrically connected to the front Symbol first substrate, an electronic device according to any one of claims 1 21. A third substrate that is electrically connected to the first substrate is included.
The electronic device according to any one of claims 1 to 6, 10 to 17, and 19, wherein the third substrate is attached to the surface of the second substrate. A third substrate that is electrically connected to the first substrate is included.
The electronic device according to any one of claims 1 to 6, 10 to 17, and 19, wherein the third substrate is attached to the surface of the first substrate. The electronic device according to any one of claims 22 to 24 , wherein the third board is attached to the first board by a connector. The non-rotating body includes a housing.
The electronic device according to any one of claims 22 to 25 , wherein the first substrate and the third substrate are attached to the housing. Motors that assist the propulsion of human-powered vehicles and
The electronic device according to any one of claims 22 to 26 , further comprising a control unit provided on the third substrate and controlling the motor. The electronic device according to any one of claims 1 to 27 , wherein the rotating body includes at least one of a crank arm, a crank shaft, a sensor support member provided on the crank shaft, and a hub body. The electronic device according to any one of claims 1 to 28 , wherein the first coil transmits electric power to the second coil. The electronic device according to any one of claims 1 to 29 , wherein the first coil and the second coil transmit and receive communication signals. The electronic device according to any one of claims 1 to 30 , wherein the distance between the first substrate and the second substrate is 0.1 mm or more and less than 2.0 mm. The electronic device according to any one of claims 1 to 31 , further comprising a sensor provided on the rotating body and electrically connected to the second electronic component. The electronic device according to claim 32 , wherein the sensor includes a strain sensor that detects the strain of the rotating body.

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