Invention Application
- Patent Title: MOVEMENT AND ELECTRONIC TIMEPIECE
- Patent Title (中): 运动和电子计时器
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Application No.: US15237868Application Date: 2016-08-16
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Publication No.: US20170052511A1Publication Date: 2017-02-23
- Inventor: Satoshi SAKAI , Katsuya MUGISHIMA , Tomohiro IHASHI , Kenji OGASAWARA
- Applicant: SEIKO INSTRUMENTS INC.
- Priority: JP2015-163992 20150821; JP2016-106237 20160527
- Main IPC: G04G19/00
- IPC: G04G19/00 ; G04G5/00

Abstract:
There is provided a movement including a center wheel & pinion that drives a minute hand, a second wheel & pinion that is arranged coaxially with a center axle of the center wheel & pinion, a first light emitting element that is arranged on one side in an axial direction of the center axle with respect to the center wheel & pinion and the second wheel & pinion, and a first light receiving element that is arranged on the other side in the axial direction of the center axle across the second wheel & pinion, and that detects light emitted from the first light emitting element. The center wheel & pinion has a first center wheel transmittable portion through which the light emitted from the first light emitting element is transmittable, and a second center wheel transmittable portion which is disposed on a rotation trajectory of the first center wheel transmittable portion and through which the light emitted from the first light emitting element is transmittable. The second wheel & pinion has a first second wheel transmittable portion which is disposed on the rotation trajectory of the first center wheel transmittable portion and the second center wheel transmittable portion when viewed in the axial direction of the center axle and through which the light emitted from the first light emitting element is transmittable.
Public/Granted literature
- US09971310B2 Movement and electronic timepiece Public/Granted day:2018-05-15
Information query