Importance

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Abstract

To provide a portable timepiece in which the maintenance of a winding stem pipe and its surroundings is facilitated. Basically provided is a portable timepiece comprising a winding stem pipe releasably screwed into a pipe attachment opening of a case band, in which portable timepiece an accidental rotation of a crown is avoided by bringing a crown head of the crown into screw-engagement with a pipe end of the winding stem pipe disposed outside of the case band such that the crown head caps the pipe end. A ring receiver is formed on one of the pipe attachment opening and an insert portion of the winding stem pipe screwed into the opening. A soft and resilient friction ring is supported on the other of the pipe attachment opening and the insert portion. The friction ring is resiliently brought into tight contact with the ring receiver to prevent a rotation of the winding stem pipe. Thus, the portable timepiece of the invention is characterized in that an accidental rotation of the winding stem pipe which may be caused during operation of the crown is prevented, and that the winding stem pipe is releasable from the case band at the time of maintenance.

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First Claim