公开(公告)号：US11237521B2

公开(公告)日：2022-02-01

申请号：US16227039

申请日：2018-12-20

Applicant: Seiko Instruments Inc.

Inventor： Masayuki Kawata ,  Toshiyuki Fujiwara ,  Kazuhiro Fujita

IPC: G04C3/14 ,  G04B13/00 ,  G04B19/02

Abstract: A timepiece movement includes a motor that has a rotor for rotating an indicating hand, a control unit that rotates the rotor by using a main drive pulse and an auxiliary drive pulse, and that determines a reference position of the indicating hand by detecting a rotation state of the rotor when the indicating hand is rotated using a detection drive pulse based on the main drive pulse, a train wheel that transmits a drive force of the motor to the indicating hand, and that has an indicating hand gear and a second intermediate pinion which mesh with each other, and an elastic portion that is disposed in the indicating hand gear, and that is elastically deformed by coming into contact with the second intermediate pinion when the indicating hand is located at the reference position.

公开(公告)号：US10824115B2

公开(公告)日：2020-11-03

申请号：US15885022

申请日：2018-01-31

Applicant: Seiko Instruments Inc.

Inventor： Masayuki Kawata

IPC: G04C3/00 ,  G04G17/04 ,  G04C10/02 ,  G04B19/04 ,  G04B19/14 ,  G04B29/00

Abstract: A timepiece allowing accurate positioning of a display plate and a plate member is to be provided. A timepiece 10 includes: a main plate 2 having one or more positioning portions 21 and 22; a plate member 3 having one or more first positioning receiving portions 33 to be locked to the positioning portions 21 and arranged so as to overlap the main plate 2; and a display plate 5 having one or more second positioning receiving portions 55 to be locked to the positioning portions 22 and arranged so as to overlap the plate member 3.