CPC A61B 17/0686 (2013.01) [A61B 2017/00407 (2013.01)] | 20 Claims |
1. A hand-held surgical instrument, comprising:
a handle housing;
a shaft portion extending distally relative to the handle housing;
a first motor disposed within the handle housing;
a screw operably coupled to the first motor;
a nut non-rotationally supported in the shaft portion and operably coupled to the screw;
a firing shaft having a proximal end portion attached to the nut, and a distal end portion configured to fire staples from an end effector, wherein the nut is configured to translate the firing shaft along a longitudinal axis defined by the shaft portion in response to a rotation of the screw;
a knob housing coupled to the handle housing, the shaft portion extending distally from the knob housing;
an articulation lever rotationally coupled to the knob housing;
a first articulation shaft operably coupled to the articulation lever, such that a rotation of the articulation lever translates the first articulation shaft to articulate an end effector;
a cam plate coupling the articulation lever with a proximal end portion of the first articulation shaft, the cam plate being configured to urge the first articulation shaft in one of a proximal direction or a distal direction upon rotation of the cam plate, wherein the cam plate includes a pair of pins extending therefrom, wherein the pair of pins of the cam plate are located on opposed sides of the longitudinal axis defined by the shaft portion; and
an articulation locking assembly including:
a first ratchet gear operably coupled to the cam plate, the first ratchet gear defining a pair of elongate slots formed therein, wherein each pin of the pair of pins of the cam plate is slidably received in a respective slot of the pair of elongate slots formed in the first ratchet gear; and
a pawl engaged with the first ratchet gear and configured to restrict the rotation of the cam plate, the first ratchet gear being non-rotationally coupled to the articulation lever and coupled to the cam plate, such that a rotation of the articulation lever rotates the cam plate, wherein the first ratchet gear is configured to rotate the cam plate after a delay.
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