| 摘要 |
<p>PURPOSE:To realize a simplified, small-sized, and lightweight device with high reliability and to decrease the number of parts by arranging a member to be operated in plane along the track of the reciprocal arcuate motion of an operation cam body which has cam structure formed in an arcuate structure body. CONSTITUTION:A loading ring 6 is provided with a gear over its entire outer periphery and arranged on the top surface of a chassis 1. An annular driving ring 27 as a part of a cam driving means is provided with a gear at a part of its inner periphery and rotatable nearby the reverse surface of the chassis 1. An operation ring 64 begins to rotate when a pin 71 reaching the end in the groove 64' of the operation ring 64 at loading operation of the driving ring 27 and enters arcuate motion on the arcuate track by the engagement between three holders 37 and a guide support part 64b. The operation ring 634 is equipped with an operation cam body 64a which has recessed parts and projection parts formed lengthwise and the member to be operated is arranged while distributed on this operation cam body 64a in plane along the track of the reciprocal arcuate motion of the operation can body 64a.</p> |
