| 摘要 |
<p>The knuckle-joint for spectacles comprises two knuckles (3 and 4) to provide for the articulation of one arm (1) to the frame (2). An intermediary part (5) is secured to the knuckle (3) by means of a screw (6) and has a cam-forming portion (11) for an elastic element (12) of the knuckle (4). Said knuckle (4) is hinged to the part (5) by means of a screw traversing a hole (10). By removing the part (5), a conventional knuckle may be hinged to the knuckle (3) to obtain a simple joint, that is to say a joint devoid of elastic return means.</p> |
