Patent ID: 7192182
Filing Date: 2007-03-20
Classification: G04B

Abstract:
1. A portable timepiece comprising: a case band provided with a pipe attachment opening having a female screw; a winding stem pipe including an insert portion provided with a first male screw releasably screwed into the female screw and a pipe end provided with a second male screw and disposed outside of the case band, the insert portion being screwed into pipe attachment opening to be fitted to the case band; a rotatable crown rotatable to adjust a function of the timepiece and having a crown head provided with a female screw which releasably screw-engages with the second male screw to be fitted to the winding stem pipe; and a friction ring which is supported on one of the pipe attachment opening and the insert portion and which is soft and resilient so as to be resiliently brought into tight contact with a ring receiver formed on the other of the pipe attachment opening and the insert portion to frictionally prevent rotation of the winding stem pipe when the crown is rotated.