Patent ID: 6043796
Filing Date: 2000-03-28
Classification: H01Q

Abstract:
A clutch for a motor driven antenna comprising:a disk-shaped driving member rotated by a rotating force of a driving motor;a disk-shaped driven member one side of which is opposite to one side of the driving member, for transmitting a rotating force of the driving member to an antenna element; anda clutch element interposed between both sides of the driving member and the driven member so as to frictionally transmit the rotating force of the driving member to the driven member, the clutch element including:recesses formed on a rotating track of one of opposing sides of the driving member and the driven member;projections formed on a rotating track of other of the opposing side so as to be fitted into the recesses when the driving member and the driven member are rotated relative to each other; andanti-slip members protruded near the recesses such that a sliding frictional force caused at tip end contact portions of the projections exceeds a maximum load of the antenna element including the driven member when the antenna element is extended or retracted.