Patent ID: 6122227
Filing Date: 2000-09-19
Classification: G04B,G04F

Abstract:
A timer comprising a base unit and an operation unit mounted on said base unit;wherein said base unit comprises:a support body provided with a receiving space;a disk disposed on said support body and provided with a retaining ring having an indentation, and a scale having a series of timing marks; anda core fastened with the underside of said disk and provided with a rotary shaft fastened therewith such that said rotary shaft faces said disk;wherein said operation unit comprises:a lower housing having a cylindrical portion, and a shaft fastening portion for retaining said rotary shaft of said core, said cylindrical portion provided with a sliding portion;an upper housing disposed on said lower housing and provided with a movable hole and a pointer corresponding in location to said scale of said disk;an action member having a body corresponding in location to said cylindrical portion of said lower housing, a retaining portion engageable with said retaining ring of said disk, and a position confining portion corresponding in location to said sliding portion of said lower housing; andan elastic member located in said cylindrical portion of said lower housing such that said elastic member urges said action member;said retaining portion of said action member being retained in said indentation of said disk at the time when said action member is exerted on by an external force, thereby enabling said operation unit to rotate such that said retaining portion of said action member is turned into said retaining ring of said disk, and that said rotary shaft of said core is turned so as to place the timer in a timing state;said action member being ejected by said elastic member at the time when said retaining portion of said action member returns to a position corresponding in location to said indentation of said disk, so as to terminate the timing state of the timer.