Patent attributes
A wristwatch has a watch case having two outwardly extending projections between which is inserted an end portion of a watch band. Two pins are disposed in the end portion and slideable outwardly to engage in holes provided in the projections to detachably connect the watch band to the watch case. A cam body is disposed within a cavity in the end portion and has an elliptic cam face so that when the cam body is turned to a first position, the cam face slides the pins outwardly to engage in the holes in the projections and when the cam body is turned 90 degrees to a second position, spring members urge the projections inwardly out of engagement with the holes in the projections. A locking mechanism releasably locks the cam body in the first position and comprises two convex click parts connected to turn with the cam body, and two concave click parts formed in a wall of the cavity at positions to engage with the convex click parts when the cam body is in the first position to thereby lock the two pins in the projection holes.
