| 摘要 |
<p>PURPOSE:To simplify construction by binding only the side surface of a rectangle link shaped trace member in contact with a member equipped with circulation cam grooves of mutually different shapes on the surfaces facing each other respectively, and circulating the trace member in a specified direction by means of the pressure from the groove wall surfaces when movement takes place. CONSTITUTION:A heart shaped cam 32 and a cam groove 20 are provided on one side of a circulation cam groove installing member 18 of a locking device 10, which makes blocking and releasing by push-pressing operation, and a circulation cam groove 22 of a different shape is provided on the other side. A part of the rectangular link of a trace member 14 is cut out so as to keep it from coming in contact with the bottom portion of the cam groove of the installing member 18 thus trace portions 24, 26 are formed. The member 18 is then secured to the fixed side and the member 14 is secured to the movable side in a freely oscillating manner. The trace member 14 then circulates in a specified direction by means of the wall surface pressure caused when push- pressing operation is applied. Thus, the construction can be simplified.</p> |
