| 摘要 |
The bottom of a plastic watch case (6) is molded to form a rod or piston (40) which is supported by a thin circular elastic rim (44). The lower surface of the rim and rod (42) are recessed and when pushed by a pen or pencil move upwards. The inside top surface of the rod is metallized (48,54) and with the upward motion closes contacts (50,52) to operate a function such as reset |
