| 摘要 |
<p>Two secateur jaws (1 and 2) are joined together by means of a pin (6) with radial lugs (6b) engaging a ring (15) attached to one jaw (1) and extending through a sleeve (7) slidably arranged in the two jaws (1 and 2). Said sleeve (7) encloses a helical return spring (9) between the sleeve and the head (6c) of the pin (6). The head (7b) of the sleeve (7) has an external screw thread (at 18) with a ring (19) screwed thereon for adjusting the tension of the spring (9). The sleeve (7) may be moved axially by screwing said ring (19) on or off to change the tension of the spring (9) and thus the force exerted by the latter on said jaws (1 and 2), whereby the engagement pressure therebetween also changes.</p> |
