| 摘要 |
PURPOSE:To make a lock and its release ever so easy with a simple constitution, by inserting a rotatable member into a coil spring and adding the stress of rotation to both of a spring winding direction and a normal or reverse round direction, while performing the rotation and release of the rotatable member. CONSTITUTION:A shaft body 1 is composed of a drum part 1a, a fulcrum supporting part extending solidly over an upper end surface of this drum part 1a, and engaging part 1c installed solidly in the lower end surface of the drum part 1a. A coil spring 4, whose winding part 4b is externally inserted into the drum part 1a, is installed in space between members 2 and 3, and the other end becomes a free end. With this, in a state of assembling, the shaft body's drum part 1a is always pressed nippingly from outside so that the second member 3 does not rotate inadvertently. Engagement between the coil spring 4 and the second member 3 takes place in a way of inserting one end of the spring 4 into an insertion hole 3a installed at the base end side of the second member 3. |
