| 摘要 |
<p>The frame (2) has a pin (6) and a branch (4) formed from a bent metal part and connected together by a hinge (5). The hinge includes a joint body defining a pivot axis (8). The joint body includes annular grooves (9) coaxial to the axis. The pin and the branch comprise portions in form of open loops (10, 11) elastically engaged in one of the grooves in direction transverse to the axis so as to assure elastic retention of the pin and the branch on the joint body and to allow pivotment of the branch with respect to the pin. The joint body is made of single block plastic material.</p> |
