MOVEMENT AND ELECTRONIC WATCH

• Main Authors: MUGISHIMA KATSUYA, SAKAI SATOSHI, IHASHI TOMOHIRO, OGASAWARA KENJI
• Format: Patent
• Language: English; Japanese
• Published: 23.02.2017
• Subjects: ELECTROMECHANICAL CLOCKS OR WATCHES; HOROLOGY; PHYSICS

PROBLEM TO BE SOLVED: To provide a movement capable of reducing power consumption when detecting hand positions.SOLUTION: A movement comprises: a second wheel 33 which drives a minute hand; a fourth wheel 43 which is arranged on the same axis as a central shaft of the second wheel 33, and drives a second hand; a first light-emitting element 61 arranged on one side in an axial direction of a central shaft with respect to the second wheel 33 and the fourth wheel 43; and a first light-receiving element 64 which is provided on the other side in the axial direction of the central shaft by sandwiching the fourth wheel 43, and detects light from the first light-emitting element 61. The second wheel 33 includes a first second wheel transmission part 35 which can transmit light from the first light-emitting element 61, and a second second wheel transmission part 36 which is provided on a rotation trajectory of the first second wheel transmission part 35, and can transmit light from the first light-emitting element 61. The fourth wheel 43 includes a first fourth wheel transmission part 45 which is provided on the rotation trajectories of the first second wheel transmission part 35 and the second second wheel transmission part 36 as viewed from the axial direction of the central shaft, and can transmit light from the first light-emitting element 61.SELECTED DRAWING: Figure 14 【課題】針位置検出時の消費電力を低減できるムーブメントを提供する。【解決手段】ムーブメントは、分針を駆動する二番車３３と、二番車３３の中心軸と同軸上に配置され、秒針を駆動する四番車４３と、二番車３３および四番車４３に対して、中心軸の軸方向における一方側に配置された第１発光素子６１と、四番車４３を挟んで中心軸の軸方向の他方側に設けられ、第１発光素子６１からの光を検出する第１受光素子６４と、を備えている。二番車３３は、第１発光素子６１からの光が透過可能とされた第１二番車透過部３５と、第１二番車透過部３５の回転軌跡上に設けられ、第１発光素子６１からの光が透過可能とされた第２二番車透過部３６と、を有している。四番車４３は、中心軸の軸方向から見て第１二番車透過部３５と第２二番車透過部３６との回転軌跡上に設けられ、第１発光素子６１からの光が透過可能とされた第１四番車透過部４５を有する。【選択図】図１４