MOVEMENT AND ELECTRONIC TIMEPIECE

摘要

A movement includes a second light emitting element, a second light receiving element, a second wheel & pinion that drives a second hand and that has a first second wheel transmittable portion and a second second wheel transmittable portion through which light is transmittable. A control unit detects a position of the second wheel & pinion by causing the second light receiving element to receive the transmitted light emitted from the second light emitting element and transmitted through the first second wheel transmittable portion or the second second wheel transmittable portion. A second detection wheel has a second detection wheel transmittable portion through which the transmitted light is transmittable. The control unit detects a transmitting time point that the transmitted light is transmitted through the first second wheel transmittable portion or transmitted concurrently the second second wheel transmittable portion and the second detection wheel transmittable portion.

主权项

1. A movement comprising:
a light emitting element; a light receiving element that is arranged for receiving light emitted from the light emitting element; a gear that is rotated by a drive source so as to drive an indicating hand, and that has a transmittable portion through which the light is transmittable; a detecting gear that has a transmittable portion for detection through which the light is transmittable, and whose rotational frequency per predetermined time is set to be faster than that of the gear, a control unit that detects a position of the gear by causing the light receiving element to receive the light which is emitted from the light emitting element and which is transmitted through the transmittable portion, and detects a transmitting time point that the light is concurrently transmitted through the transmittable portion and the transmittable portion for detection, and causes the light emitting element to stop light emitting when the transmittable portion for detection is located at other positions except for a predetermined position where the transmittable portion for detection is located at the transmitting time point.