Endoscopic surgical instrument with a handle that can articulate with respect to the shaft
A surgical instrument particular suited to endoscopic use is disclosed. Various embodiments include an end effector that is sized to be inserted through a trocar. An elongated shaft assembly is coupled to the end effector and a control handle. The elongated shaft assembly has a distal portion that is adjacent to the effector for insertion into the trocar. The elongated shaft assembly further has a proximal portion that is remote from the distal portion such that the proximal portion protrudes from the trocar when the end effector and distal portion are inserted therethrough. The control handle is articulatably coupled to the proximal portion of said elongated shaft assembly to enable the surgeon to move the handle portion to a more ergonomically comfortable position while carrying out the endoscopic procedure. Various articulation joint embodiments and locking arrangements are disclosed.
1. A surgical instrument, comprising:
a housing;
a shaft extending from said housing, wherein said shaft defines a shaft axis;
an end effector extending from said shaft, wherein said end effector comprises:
a first jaw;
a second jaw rotatable relative to said first jaw between an open position and a second position;
a staple cartridge, comprising:
a plurality of staples removably stored therein; and
a wedge sled; and
a closure member translatable between a distal position and a proximal position, wherein said closure member cammingly engages said second jaw and moves said second jaw from said open position toward said second position when said closure member translates from said distal position toward said proximal position;
a rotatable drive screw; and
a firing member operably engaged with said drive screw such that the rotation of said drive screw results in the translation of said firing member, wherein said firing member is advanceable through a firing stroke to advance said wedge sled from an unfired position to a fired position, wherein said wedge sled is configured to eject said staples from said staple cartridge when said wedge sled moves from said unfired position toward said fired position, and wherein said firing member comprises:
a first cam member configured to engage said first jaw during said firing stroke; and
a second cam member configured to engage said second jaw during said firing stroke.
2. The surgical instrument of claim 1 , wherein said wedge sled remains in said fired position when said firing member is retracted through a retraction stroke after said firing stroke.
3. The surgical instrument of claim 1 , wherein said firing member and said closure member are operable independently of one another.
4. The surgical instrument of claim 1 , wherein said first cam member and said second cam member maintain a predetermined gap between said first jaw and said second jaw during said firing stroke.
5. The surgical instrument of claim 1 , wherein said staple cartridge is replaceable with another staple cartridge.
6. A surgical instrument, comprising:
a housing;
a shaft extending from said housing, wherein said shaft defines a shaft axis;
an end effector extending from said shaft, wherein said end effector comprises:
a first jaw;
a second jaw movable relative to said first jaw between an open position and a closed position; and
a staple cartridge, comprising:
a plurality of staples removably stored therein; and
a wedge sled;
a closure member configured to cammingly engage said second jaw and move said second jaw from said open position toward said closed position when said closure member translates proximally;
a drive screw rotatable about said shaft axis; and
a firing member operably engaged with said drive screw such that rotation of said drive screw results in translation of said firing member, wherein said firing member is configured to distally advance said wedge sled to eject said staples from said staple cartridge during a firing stroke, and wherein said firing member comprises:
a first cam member configured to engage said first jaw during said firing stroke; and
a second cam member configured to engage said second jaw during said firing stroke.
7. The surgical instrument of claim 6 , wherein said wedge sled remains in a fired position when said firing member is retracted through a retraction stroke after said firing stroke.
8. The surgical instrument of claim 6 , wherein said firing member and said closure member are operable independently of one another.
9. The surgical instrument of claim 6 , wherein said first cam member and said second cam member maintain a predetermined gap between said first jaw and said second jaw during said firing stroke.
10. The surgical instrument of claim 6 , wherein said staple cartridge is replaceable with another staple cartridge.
11. A surgical instrument, comprising:
an end effector, comprising
a first jaw;
a second jaw movable relative to said first jaw between an unclamped position and a clamped position; and
a fastener cartridge, comprising:
a plurality of fasteners removably stored therein; and
a sled;
a closure member configured to move said second jaw from said unclamped position toward said clamped position when said closure member translates proximally;
a drive screw rotatable relative to said end effector; and
a firing member operably engaged with said drive screw such that rotation of said drive screw results in translation of said firing member, wherein said firing member is configured to distally advance said sled to eject said fasteners from said fastener cartridge during a firing stroke, and wherein said firing member comprises:
a first cam member extending laterally from said firing member and configured to engage said first jaw during said firing stroke; and
a second cam member extending laterally from said firing member and configured to engage said second jaw during said firing stroke.
12. The surgical instrument of claim 11 , wherein sled remains in a fired position when said firing member is retracted through a retraction stroke after said firing stroke is performed.
13. The surgical instrument of claim 11 , wherein said firing member and said closure member are operable independently of one another.
14. The surgical instrument of claim 11 , wherein said first cam member and said second cam member maintain a predetermined gap between said first jaw and said second jaw during said firing stroke.
15. The surgical instrument of claim 11 , wherein said fastener cartridge is replaceable with another fastener cartridge.