US 12,274,425 B2
Surgical instrument and locking device thereof
Dominik Längle, Tuttlingen (DE); Janosz Schneider, Tuttlingen (DE); and Jochen Stefan, Tuttlingen (DE)
Assigned to KARL STORZ SE & Co. KG, Tuttlingen (DE)
Filed by KARL STORZ SE & Co. KG, Tuttlingen (DE)
Filed on Jul. 21, 2022, as Appl. No. 17/869,890.
Claims priority of application No. 10 2021 119 531.4 (DE), filed on Jul. 28, 2021.
Prior Publication US 2023/0033865 A1, Feb. 2, 2023
Int. Cl. A61B 17/00 (2006.01)
CPC A61B 17/00234 (2013.01) [A61B 2017/00384 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a surgical instrument, and
a locking device configured for arrangement in an actuation unit of the surgical instrument, the surgical instrument including a hollow shaft with the actuation unit arranged at a proximal end of the shaft and having a tool at a distal end of the shaft, which can be actuated by an instrument insert which is configured to be movably stored axially in a direction of a main axis of the surgical instrument in the shaft,
wherein the locking device includes an engagement element configured for engagement with the instrument insert, and the actuation unit which is configured to move the engagement element from a release position, in which there is no engagement with the instrument insert, into a locking position in which the engagement element is in engagement with the instrument insert, wherein:
the engagement element is a locking bolt with a longitudinal axis that runs perpendicular to the main axis of the surgical instrument and which has an engagement section configured for engagement with the instrument insert at a first end and a guide section at a second end which is in operative connection with the actuation unit,
the locking bolt is transferable by the actuation unit in a first direction of movement along the longitudinal axis of the locking bolt perpendicular to the main axis of the surgical instrument from the release position to the locking position and in a second direction of movement, opposite to the first direction of movement, along the longitudinal axis of the locking bolt perpendicular to the main axis of the surgical instrument from the locking position to the release position,
the actuation unit is a cam wheel with a cam track which extends in a shape of a circular arc around an axis of rotation of the cam wheel between a first end stop and a second end stop, and a depth of the cam track increases from the first end stop to the second end stop, so that a bottom of the cam track runs inclined between the first end stop and the second end stop,
and the locking bolt is configured to be guided with the guide section of the locking bolt in the cam track, and the longitudinal axis of the locking bolt is parallel to the axis of rotation of the cam wheel.