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公开(公告)号：EP1241539B1
公开(公告)日：2011-09-28
申请号：EP01943878.7
申请日：2001-06-29
发明人： UCHIDA, Hitoshi, c/o CITIZEN WATCH CO., LTD. , FUJII, Kouji, c/o CITIZEN WATCH CO., LTD. , SATOH, Junji, c/o CITIZEN WATCH CO., LTD.
CPC分类号： B23K20/002 , B23K20/14 , B23K20/16 , G04B37/06 , G04B37/082 , G04B37/22 , G04D3/0061 , Y10T29/49579 , Y10T29/49581 , Y10T29/49584 , Y10T29/49586 , Y10T29/49885 , Y10T29/49945
摘要： One wristwatch case, characterized in that a pipe is fixedly connected thereto and a connection interface between the wristwatch case and the pipe is not present substantially; the method of fixing the wristwatch, comprising the steps of providing a through-hole in the wristwatch case, press-fitting the pipe of 0 mm. or larger in press-fitting tolerance (pipe outer diameter - through-hole diameter) between the through-hole and the pipe, and heating the wristwatch case after the press-fitting step; the other wrist-watch case, characterized in that a pipe is fixedly connected thereto through a diffusion layer; the method of fixing the pipe of the wristwatch case, comprising the steps of forming a through-hole in the wristwatch case, press-fitting the pipe of 0 mm. or larger in press-fitting tolerance (outer diameter of pipe having a metal film formed on the surface thereof - diameter of through-hole) between the through-hole and the pipe having a metal film formed on the surface thereof, and heating the wristwatch case in vacuum or reducing gas atmosphere after the press-fitting step.
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