CLOCK MOVEMENT AND CLOCK

• Main Authors: FUJIWARA TOSHIYUKI, FUJITA KAZUHIRO, KAWADA MASAYUKI, NAKAMURA KAZUFUMI, SATO MASARU, MUGISHIMA KATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2019
• Subjects: ELECTROMECHANICAL CLOCKS OR WATCHES; HOROLOGY; PHYSICS

To provide a clock movement which can perform means for grasping reference positions of pointers by a prescribed load by which the pointers can be normally handled, and has no limit on rotation directions and rotation ranges of the pointers.SOLUTION: A clock movement comprises: a motor having a rotor for rotating pointers; a control part for rotating the rotor by a main drive pulse and an auxiliary drive pulse, and determining reference positions of the pointers by detecting a rotation state of the rotor when the pointers are rotated by the detection drive pulse based on the main drive pulse; a wheel row 30 having a pointer gear 33a and an intermediate small gear 32b which transmit drive forces of the motor to the pointers, and are engaged with each other; and an elastic part 56 which is arranged at the pointer gear 33a, and elastically deformed by contacting with the second intermediate small gear 32b when the pointers are located in the reference positions.SELECTED DRAWING: Figure 12 【課題】指針の基準位置を把握する手段を、通常運針可能な所定負荷によっても実現することができる時計用ムーブメントを提供する。【解決手段】時計用ムーブメントは、指針を回転させるロータを有するモータと、主駆動パルスおよび補助駆動パルスによってロータを回転させるとともに、主駆動パルスに基づく検出駆動パルスによって指針を回転させたときにロータの回転状態の検出により指針の基準位置を判断する制御部と、モータの駆動力を指針に伝達し、互いに噛み合う指針歯車３３ａおよび第２中間かな３２ｂを有する輪列３０と、指針歯車３３ａに設けられ、指針が基準位置に位置するときに第２中間かな３２ｂに接触して弾性変形する弾性部５６と、を備える。【選択図】図１２