Seiko Epson Corporation

Yoshio Mishima

Atsushi Kobayashi

Takumi Oshio

Yoshihiro Hidai

A timepiece includes an inner rotating ring including a plurality of teeth portions; a driving crown including a head portion and a shaft portion; and a driving wheel including a hole portion engageable with and disengageable from the shaft portion, and configured to mesh with the teeth portions. The hole portion includes a plurality of protruding portions disposed at intervals of an angle smaller than 90° and protruding toward a rotation axis of the shaft portion.

Ttimepiece having a driving wheel including a hole with projections disengageable with a crown shaft

A timepiece includes a case including a protrusion protruding inward from an inner wall, a crown including a shaft passing through the side surface of the case, a head provided at one end of the shaft, and a drive wheel provided at the other end opposite from the one end of the shaft, an internal rotary ring provided in a position where the internal rotary ring overlaps with the protrusion in the plan view and having teeth that engage with the drive wheel, and elastic members disposed between the protrusion and the internal rotary ring and each including a convex section that engages with the teeth.

Timepiece

A watch outer packaging component is a watch outer packaging component formed of austenitized ferritic stainless steel including a base formed of a ferrite phase and a surfacing layer formed of an austenitized phase in which the ferrite phase is austenitized, the watch outer packaging component abutting on a sealing member that partitions between a space inside a watch and a space outside the watch, wherein the surfacing layer includes an outer surfacing layer provided at an outer surface facing the space outside the watch, and an inner surfacing layer provided at an inner surface facing the space inside the watch, and the inner surfacing layer is thinner in thickness than the outer surfacing layer.

Watch outer packaging component and watch

A watch includes a case, a first spring bar support portion and a second spring bar support portion which are provided on the case. Further included is a spring bar supported by the first spring bar support portion and the second spring bar support apportion, a cover member into which the spring bar is inserted and which is between the first spring bar support portion and the second spring bar support portion. The cover member entirely surrounds a circumference of the spring bar. A band is provided between the cover member and the case.

Watch

In a crown for a timepiece including a crown body having a recess formed therein and a decorative jewel fixed into the recess, a bonding agent is disposed between the inner side surface of the recess and the decorative jewel, and the depth dimension of the inner side surface is at least 0.5 mm.

Growing community of inventors

Matsumoto, Japan

Yoshio Mishima