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US 12,287,226 B2Granted
Rotation detection device, medium transport device, and recording device
AssigneeSeiko Epson Corporation
InventorsSoshi Okawa, Yuki Komatsu
Life of this patent
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Abstract
A pulley serving as a rotary body and a scale configured to rotate integrally with the pulley are attached to an end portion of the pulley serving as the rotary body in a thrust direction, a detection unit is configured to detect rotation of the pulley serving as the rotary body by reading a reading region of the scale. An absorber capable of absorbing liquid is attached to a surface of the scale on which a reading region is present, and when liquid adheres to the scale, the absorber absorbs the liquid.
Claims16
A rotation detection device comprising:
- a rotary body configured to rotate in a circumferential direction;
- a drive mechanism configured to rotate the rotary body;
- a scale attached to an end portion of the rotary body in a thrust direction and configured to rotate integrally with the rotary body;
- a detection unit configured to detect the rotation of the rotary body by reading a reading region of the scale;
- and
- an absorber attached to a first surface of the scale facing the drive mechanism.
3 more elements
Dependencies are inferred from the claim text.