摘要 |
<p>Connection pieces (5,6) are integrally formed from the pair of the side wall portions (4) of uniform thickness. Staking portions (13a) are formed at the edge portions of both end faces of a pivot shaft (3) supported by the portions (4), so that outer peripheries of both ends of the shaft are in contact with the tapered side wall portions (4) along the through-holes (11).</p> |