| 摘要 |
<p>A sprocket and crank assembly including an integral sprocket and crank part formed by a press operation from steel plate or super duralumin plate material, with the crank (21) projecting from the center of the sprocket (20) and extending at one side of the same, the sprocket (20) is formed with a toothed periphery, and a radial notch (224) constituting a discontinuity of the toothed periphery which is completed by a rack member (30).</p> |
