Patent ID: 9700337
Date: 2017-07-11
CPC Classifications: A61B

Claim:
1. A surgical instrument comprising: an elongated arm extending along a longitudinal axis and having a distal member mounted at a distal end of the elongated arm with means forming a pivot joint around a pivot axis orthogonal to the longitudinal axis; a rotation shaft coaxial with the elongated arm comprising means forming a universal joint facing the pivot joint; a distal tool securely fastened at a distal end of the rotation shaft and rotatably mounted on and in the extension of the distal member of the elongated arm, such that the distal tool has two rotational degrees of freedom, distinct and independent of each other, one degree of freedom being around the pivot axis and the other degree of freedom being around an axis collinear to an axis of the distal tool; an actuation unit mounted on and in the extension of a proximal end of the elongated arm, said actuation unit comprising motorized means for actuating the motion of the distal tool through the two rotational degrees of freedom, and further comprising controlling means for a user to control the motorized means; and a handle extending from the actuation unit; wherein the controlling means comprise electronic components for actuation of the motorized means, and switch elements for the user to control the electronic components, the switch elements comprising at least one magnet for contactless signal transmission to hall sensors of the electronic components, wherein the switch elements comprise an outer knob and an inner knob, with the at least one magnet being fastened to the outer knob and being mounted in translation within a longitudinal groove provided in the inner knob along an axis parallel to the longitudinal axis, said inner knob being rotatably mounted around the longitudinal axis.