Patent ID: 7380979

Claim:
A wristwatch having a band detachably connected to a case band, comprising: two spaced-apart bow feet which protrude from the case band and which define therebetween a bow crotch for detachably receiving an end piece of the band, each of the bow feet having an attachment hole; a cam body having a cam part that has an elliptic cam face and an operation groove, the cam body being rotatably accommodated in a cam body accommodation part of the end piece with the operation groove exposed; two attachment axles each of which has a cam follower face in contact with the cam face, the attachment axles being accommodated in the end piece so as to be movable, in response to rotation of the cam body, in a width direction of the end piece into and out of respective ones of the attachment holes due to a dimensional difference between a major axis and a minor axis of the cam part; two biasing bodies accommodated in the end piece and respectively pushing the attachment axles into contact with the cam face; and a locking mechanism comprising an elastic deformation cart having a click convex part connected to the cam body for rotation therewith, and a concave clock reception part provided in an inner face of the cam body accommodation part of the end piece, the clock convex part being engageable with and disengageable from the concave clock reception part in response to rotation of the cam body to releasably lock the attachment axles in the attachment holes.