| 摘要 |
<p>Aligning device comprises a hoop (1) which is operated by a lever (8) and an adjusting part (11) formed as a single operating unit (B) for the hoop. An independent claim is also included for an operating unit for the aligning device. Preferred Features: The operating unit is made from a plastic material having a bending strength of more than 7 kN/cm2>, preferably more than 10 kN/cm2>, and an impact strength of more than 0.7 J/cm2>, preferably more than 1.0 J/cm2>. The operating unit has a sliding surface (11a) for supporting on the hoop and contoured so that when the operating unit is moved to close the hoop a pressing force of the operating unit counteracting the force of a spring (9) rises to a maximum value and falls again.</p> |
