| 摘要 |
The invention relates to a gripping instrument, in particular a needle holder, for endoscopic surgery. The needle holder consists of a front forceps zone with clamping jaws, an instrument tube (17) in which a lingitudinally dispaceable pull rod (3) is guided, a rearward handle arangement which, when actuated, drives, an adjustment element connected to the pull rod, and a spring element for the limitation of force from the handle arrangement. A force-limiting coupling is formed according to the invention in that the adjustment element (7) comprises at its distal end a sleeve arrangement (6,8,12) in which the proximal end zone of the pull rod (3) is guided displaceable in longitudinal direction. A second abutting surface (5) is provided at the distal end of the sleeve arrangement (6,8,12) and a first abutting surface (9) is secured at the pull rod (3) in the zone inserted into the sleeve arrangement. Seated between the first 99) and the second abutting surface (5) is a compression spring which is compressed upon loading of the adjustment element (7) as soon as there is resistance to the further movement of the clamping jaws and therefore of the pull rod. This prevents an overloading of the clamping jaws and of the whole instrument when the handle arrangement is pressed together. |
