| 摘要 |
A laparoscopic instrument comprises a handle ( 1 ), a shaft ( 2 ) supported by the handle ( 1 ), and a working tip ( 3 ) disposed at the distal end of the shaft ( 2 ), the shaft ( 2 ) comprising a distal curvable section ( 4 ) and, for the adjustment of the curvature of the curvable section ( 4 ), a tension element ( 7 ) formed by a wire or cord extends from the proximity of the handle ( 1 ) across the curvable section ( 4 ) and is secured at the distal side of the curvable section ( 4 ) on the shaft ( 2 ) or on the working tip ( 3 ), and an actuation member ( 5 ), disposed in the proximity of the handle ( 1 ), cooperates with the tension element ( 7 ) for exerting a tensile action onto the tension element ( 7 ), and wherein over the curvable section ( 4 ) several guide brackets ( 8 ) for the tension element ( 7 ) are disposed spaced apart from one another in the longitudinal direction of the curvable section ( 4 ). Over the curvable section ( 4 ) extends furthermore a leaf spring ( 19 ) which, in the untensioned state, is straight, wherein the raising of the tension element ( 7 ) from the leaf spring ( 19 ) is limited by the guide brackets ( 8 ).
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