| 摘要 |
Cutting pliers for surgical purposes are used to cut through wires (40) or the like. The cutting pliers have a first two-armed hand lever (1), whose shorter, front lever arm (3) is provided with a cutting edge on its front end section. A short lever arm (11) of a second hand lever (10) is connected in terms of transmission to a two-armed cutting lever (20) having the second cutting edge via a lever transmission. To reduce the number of joints needed and to obtain higher progressions of the cutting forces on the cutting lever during the cutting operation, the short lever arm (11) of the second hand lever (10) is provided at a radially spaced location from the joint of pliers (Z) with a curved path (K1, K2), via which this short lever arm (11) acts on the cutting lever (20). This lever arm (25) is provided for this purpose with a transmission element (31, 31') sliding on the curved path (Kl, K2). The curved path (K, K1, K2) extends such that the radial distance (a0, a1, a2) between the lines of force (KL0, KL1, KL2) of the cutting force component acting on the curved path (K, K1, K2) at the power transmission point during the closing movement of the second hand lever (10) and the axis (S) of the joint of pliers (Z) changes from a maximum (a0) at the beginning of the closing movement to a minimum (a2) at the end of the closing movement.
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