Electrical device and rotational device for human-powered vehicle
An electrical device for a rotational device of a human-powered vehicle comprises a housing and a force sensor. The housing includes an outer surface and an inner surface. The outer surface includes an attachment surface configured to be attached to an additional attachment surface of the rotational device with an adhesive agent. The inner surface defines an internal space. The force sensor is attached to the attachment surface and is configured to measure a force applied to the rotational device in an attachment state where the attachment surface is attached to the additional attachment surface of the rotational device.
1. An electrical device for a rotational device of a human-powered vehicle, comprising:
a housing including
an outer surface including an attachment surface configured to be directly attached to an additional attachment surface of the rotational device with an adhesive agent in an attachment state, and
an inner surface defining an internal space; and
a force sensor attached to the attachment surface, the force sensor being configured to be directly attached to the additional attachment surface with the adhesive agent in the attachment state, the force sensor being configured to measure a force applied to the rotational device in the attachment state.
2. The electrical device according to claim 1 , wherein
the force sensor is entirely provided outside the internal space.
3. The electrical device according to claim 1 , wherein
the housing includes a base plate at least partially defining the internal space, and
the base plate includes the attachment surface.
4. The electrical device according to claim 3 , wherein
the base plate partially defines the outer surface, and
the base plate partially defines the inner surface.
5. The electrical device according to claim 1 , further comprising
a position detector at least partially provided in the internal space and configured to detect a rotational position of the rotational device.
6. The electrical device according to claim 1 , further comprising
a wireless communicator at least partially provided in the internal space and configured to wirelessly communicate with an additional wireless communicator of an additional electric device.
7. The electrical device according to claim 1 , further comprising
an electronic controller at least partially provided in the internal space and electrically connected to the force sensor.
8. The electrical device according to claim 7 , further comprising
a flexible printed circuit electrically connecting the force sensor and the electronic controller.
9. The electrical device according to claim 1 , wherein
the force sensor includes a strain gauge attached to the attachment surface.
10. The electrical device according to claim 1 , wherein
the housing includes a base plate,
the housing includes a cover, and
the base plate and the cover at least partially define the internal space.
11. The electrical device according to claim 1 , wherein
the force sensor is configured to be at least partially provided in the adhesive agent.
12. A rotational device for a human-powered vehicle, comprising:
a crank arm; and
the electrical device according to claim 1 ,
the force sensor and the attachment surface being attached to the crank arm with the adhesive agent.
13. The rotational device according to claim 12 , wherein
the force sensor is at least partially provided in the adhesive agent.
14. The rotational device according to claim 12 , further comprising:
a crank axle; and
a sprocket, wherein
the crank arm is secured to the crank axle.
15. The rotational device according to claim 14 , wherein
the electrical device is at least partially provided to at least one of the crank axle, the crank arm, and the sprocket.
16. A rotational device for a human-powered vehicle, comprising:
a pedal axle;
a pedal body rotatably coupled to the pedal axle; and
the electrical device according to claim 1 ,
the force sensor and the attachment surface being attached to at least one of the pedal axle and the pedal body with the adhesive agent.
17. The rotational device according to claim 16 , wherein
the force sensor is at least partially provided in the adhesive agent.
18. The rotational device according to claim 16 , wherein
the electrical device is at least partially provided to at least one of the pedal axle and the pedal body.
19. The electrical device according to claim 1 , wherein
the force sensor is attached to the attachment surface with an additional adhesive agent.
20. An electrical device for a rotational device of a human-powered vehicle, comprising:
a housing including
an outer surface including an attachment surface configured to be attached to an additional attachment surface of the rotational device with an adhesive agent, and
an inner surface defining an internal space; and
a force sensor attached to the attachment surface and configured to measure a force applied to the rotational device in an attachment state where the attachment surface is attached to the additional attachment surface of the rotational device, wherein
the housing includes a base plate including the attachment surface,
the housing includes a cover including a first outer surface configured to be adhered to the additional attachment surface of the rotational device in the attachment state,
the base plate and the cover at least partially define the internal space,
the attachment surface being recessed in relation to the first outer surface to form a recessed area, and
the force sensor is at least partially provided within the recessed area.