Gear train mechanism of timepiece
AssigneeCitizen Watch Co., Ltd.
InventorsTadahiro FUKUDA, Shinpei FUKAYA
Life of this patent
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Abstract
A gear train mechanism of a timepiece is formed by a gear having an involute tooth profile, which is easily manufactured, and a pinion that meshes with the gear. In order to reduce a fluctuation in torque to be transmitted, a gear train mechanism of a timepiece includes a gear including a tooth having a tooth profile of an involute curve and a pinion including a tooth meshing with the tooth of the gear to transmit and receive a torque, wherein the torque to be transmitted from the gear to the pinion is substantially constant at least in a part of a first half of a meshing period of the gear and the pinion.
Claims10
A gear train mechanism of a timepiece, comprising:
- a gear including a tooth having a tooth profile of an involute curve;
- and
- a pinion including a tooth meshing with the tooth of the gear to transmit and receive a torque, wherein
- the torque to be transmitted from one of the gear and the pinion to the other of the gear and the pinion is substantially constant at least in a part of a first half of a meshing period of the gear and the pinion.
Dependencies are inferred from the claim text.