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US 9,810,525 B2Granted
Bolt sensor
AssigneeMinebea Co., Ltd.
InventorsTakayori Hashimoto, Takuya Kitajima
Life of this patent
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Abstract
There is provided a bolt sensor which detects a fastened state of a bolt. The bolt sensor includes a sensor body including a through hole into which a shaft of the bolt is to be inserted, a light guide extending along an outer periphery of the sensor body, and a light source configured to emit light to the light guide based on output of the sensor body.
Claims8
A bolt sensor configured to detect a fastened state of a bolt, comprising:
- a sensor body including a through hole into which a shaft of the bolt is to be inserted;
- a light guide extending along an outer periphery of the sensor body;
- and
- a light source configured to emit light to the light guide based on output of the sensor body, wherein
- the light guide includes a light guide plate having an incident surface through which the light from the light source enters into the light guide plate and an emission surface from which the light entered into the light guide plate through the incident surface is emitted, and
- an opposing surface, of the light guide plate, on an opposite side of the emission surface has a plurality of concaves which reflect the light entered into the light guide plate through the incident surface toward the emission surface.
3 more elements
Dependencies are inferred from the claim text.