| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a simple support portion between a pedal and a rod, capable of making the mutual oscillating motion of a pedal and a tension-resisting or pressure-resisting rod. SOLUTION: A pin 3 has a spherical central portion 4, and the free ends 5, 6 of the pin have a diameter (d) smaller than that of the spherical central portion having a comparatively large diameter (D).</p> |
