| 摘要 |
<P>PROBLEM TO BE SOLVED: To pursue durability, and to enable the mass production of a pull-spring. <P>SOLUTION: In order to eliminate a risk in a conventional pull-spring that a root of a hook is broken since the hook is arranged by erecting both ends of a power spring, a round spring eliminated in the existence of a spring and the hook and strong in repulsive force is developed by using a repulsive force generated from action which obliquely deforms the spring by pulling right and left sides of the inner surface of a circular to the right and left. <P>COPYRIGHT: (C)2012,JPO&INPIT |
