Casio Computer Co., Ltd.

Satoshi Fujio

Kenichi Nakamura

Wataru Yamada

Takashi Watanabe

Masayoshi Tanazawa

Masaru Shoji

Mitsunobu Yatabe

Kanenori Ochiai

Masaki Yokohama

An apparatus has a hand shaft formed of synthetic resin which has a first hand shaft portion and a second hand shaft portion having an insertion hole into which the first hand shaft portion is inserted to be rotatable. The first hand shaft portion is formed in a columnar shape by molding with the synthetic resin containing fiber-like reinforcing materials. In the synthetic resin forming the first hand shaft portion, the longitudinal axes of fiber-like reinforcing materials are oriented to be consistent with the longitudinal axis of the first hand shaft.

Apparatus with synthetic resin hand shaft

Synthetic resin shaft and gear portions are molded to be capable of slipping each other. During a normal timepiece operation, the shaft and gear portions are integrally rotated. During a hand setting operation, the shaft portion is rotated with slip on the gear portion. In this slip structure of a timepiece, at least one of the shaft and gear portions is formed of an oil-containing resin material.

Slip structure of a timepiece

Growing community of inventors

Akishima, Japan

Satoshi Fujio