| 摘要 |
PROBLEM TO BE SOLVED: To secure the airtightness of a wristwatch by preventing the occurrence of a crack in a welding part by preventing infiltration of a solvent such as alcohol into a boundary part of a wristwatch case and a watch glass. SOLUTION: In this wristwatch where a synthetic resin watch glass 2 in joined to the upper center of a synthetic resin wristwatch case 1 by the welding part 15, and an upper surface bezel 12 is installed on the upper outer periphery of the wristwatch case 1 by covering a boundary part of the wristwatch case 1 and the watch glass 2, a pressure sensitive adhesive double coated tape 2 having corrosion resistance to the solvent such as alcohol is stuck to an outside surface of the boundary part of the wristwatch case 1 and the watch glass 2 positioned outside the welding part 15. Thus, infiltration of the solvent into the welding part 15 from between the wristwatch case 1 and the watch glass 2 can be prevented by the pressure sensitive adhesive double coated tape 20, and thus, the occurrence of the crack in the welding part 15 by the solvent can be prevented, and the airtightness can be secured.
|
