公开(公告)号：US11334031B2

公开(公告)日：2022-05-17

申请号：US16597331

申请日：2019-10-09

Applicant: Seiko Instruments Inc.

Inventor： Toshiyuki Fujiwara ,  Kenji Ogasawara

IPC: G04B13/02 ,  G04C3/14 ,  G04C3/00 ,  G04C13/11

Abstract: A timepiece movement capable of suppressing generation of malfunction of a hand is provided. The movement includes an indicator hand wheel which is provided so as to be rotatable and to which an indicator hand is mounted; an indicator hand stepping motor rotating and driving the indicator hand wheel in both directions; an hour wheel provided so as to be rotatable around a first rotation axis different from a rotation axis of the indicator hand wheel and having a first shaft portion which extends along the first rotation axis and on the outer peripheral surface of which there is provided a contact portion that the indicator hand can abut, with the distance of the contact portion from the first rotation axis varying in accordance with a position in the peripheral direction around the first rotation axis; and an hour hand stepping motor rotating and driving the hour wheel and provided separately from the indicator hand stepping motor.

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：US20190219969A1

公开(公告)日：2019-07-18

申请号：US16227039

申请日：2018-12-20

Applicant: Seiko Instruments Inc.

Inventor： Masayuki KAWATA ,  Toshiyuki Fujiwara ,  Kazuhiro Fujita

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

CPC classification number: G04B19/02 ,  G04B13/00 ,  G04C3/14 ,  G04C3/143

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.