Medical instrument

摘要

A medical instrument having a shaft, at the proximal end of which a handle is arranged, wherein the shaft is rotatable about its longitudinal axis and can be secured in various positions of rotation relative to the handle via a licking mechanism. In order for a medical instrument with a shaft rotatable about its longitudinal axis to be designed in such a way that, while being easy to handle, it permits a large number of secure and positionally precise rotations of the shaft with respect to the handle, the licking mechanism is designed as a latching mechanism which has a perforated disk with recesses and latching elements, wherein the latching elements and/or the perforated disk are spring-loaded relative to each other, and at least one of the latching elements engages in a corresponding recess of the perforated disk in order to fix the shaft.

主权项

1. A medical instrument, comprising:
a shaft, at a proximal end of which a handle is arranged, the shaft being mounted so as to be rotatable about a longitudinal axis of the shaft with respect to the handle; and a locking mechanism adapted to secure the shaft in various positions of rotation relative to the handle; wherein the locking mechanism is designed as a latching mechanism which has a perforated disk with recesses, and latching elements; wherein each of the latching elements is moveable relative to the perforated disk in a direction parallel to the longitudinal axis of the shaft between (i) a latched position in which the latching element engages in a corresponding one of the recesses of the perforated disk in order to prevent rotation of the shaft relative to the handle, and (ii) an intermediate position, in which the latching element is not engaged in any one of the recesses of the perforated disk; and wherein each of the latching elements includes a spring element that biases the latching element in a direction toward the perforated disk; and wherein a distance between two latching elements arranged next to each other differs from a distance between two recesses arranged next to each other on the perforated disk; wherein the latching elements include at least a first latching element and a second latching element, and the latching elements are configured such that the first latching element can be in the latched position when the second latching element is in the intermediate position.