Structure of water-tight watch case

摘要

A water-tight watch case construction is provided which includes a case body, a crystal mounted in one end of the case body, and a back cover connected to the other end thereof. The crystal is provided with a beveled top edge and a vertical surface between the top and under surfaces thereof. The portion of the case body adjacent the vertical surface of the crystal is recessed for thereby defining a gasket seat and a peripheral flange overlying the beveled edge of the crystal. A gasket is mounted in the gasket seat and the vertical edge of the crystal is compressively engaged therewith. Underlying the crystal is a supporting flange releasably mounted in the case body for supporting the crystal along a marginal portion of the underside surface thereof. Releasably securing the supporting flange in position is a supporting frame connected to the dial assembly of the watch which is provided with an elbow abutting a relief provided on the back cover of the watch. The case body and back cover of the watch are respectively provided with corresponding threads and the back cover is threadably connected to the case body for thereby engaging the relief provided in the back cover against the supporting frame for the crystal support flange.