| 摘要 |
<p>PURPOSE:To make the thickness of the mechanism thin by dividing a coil spring which presses a slanting guide base against a V block into plural parts and coupling them with a linear member, and storing the coil spring in a long-sized hole formed in a loading ring. CONSTITUTION:A spring hook pin 1a where a tension coil spring 2 is hooked and a guide pin 1b which is inserted into the hook 3a of the tension coil spring which has the linear part are stood on the loading ring 1. The other hook of the spring 3 is hooked to the shaft 4a of an arm 4 which is guided in a guide groove 1c and the spring 2 is extended between the hook 3a and pin 1a. The springs 2 and 3 which are thus coupled are stored in the arcuate long hole 5c of the loading ring 5 while the linear part of the hook 3a is guided by the pin 1b as a guide member to bend. In the guide groove 1c, the shaft 4a is supported slidably so that the ring 1 can further rotate even after the slanting guide base 12 abuts on the V block. Consequently, the distance between the ring 5 and chassis 1 is shortened to reduce the thickness.</p> |
