| 摘要 |
<p>The device has a spring provided near hinge positions between hand grips, where the spring is compressed by both the hand grips. The hand grips are coated with plastic such as rubber. Levers in the hinge positions form round hinge parts, and bushings are closed by covers (31, 32). The hinge parts comprise center holes for bolts (1) and nuts (2) and arc-shaped openings (16, 26) around the center holes. Bolts (35) pass through the arc-shaped openings by pressing the covers with larger or smaller sections.</p> |
