Surgical instrument comprising an articulation system lockable by a closure system
View Patent ↗A surgical instrument comprising a shaft, an end effector rotatable relative to said shaft about an articulation joint, an articulation system configured to rotate the end effector, and an articulation lock. The articulation lock is configured to selectively couple the articulation system to a frame of the shaft. In various embodiments, the surgical instrument further comprises a lock plate movable within the shaft frame. In such embodiments, the articulation lock is configured to lock the articulation system to the lock plate.
1. A surgical instrument, comprising:
an end effector, comprising:
a proximal end;
a distal end;
a first jaw; and
a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and
a shaft, comprising:
a frame, wherein said frame comprises a first longitudinal rack of lock teeth positioned directly on said frame;
an articulation joint, wherein said end effector is rotatably connected to said shaft by said articulation joint;
an articulation actuator operably connected to said end effector, wherein said articulation actuator is movable distally to rotate said end effector in a first direction and proximally to rotate said end effector in a second direction, and wherein said articulation actuator comprises a second longitudinal rack of lock teeth;
an articulation lock comprising a third group of lock teeth, wherein said articulation lock is positionable in a disengaged position in which said third group of lock teeth is not engaged with said frame and said articulation actuator and an engaged position in which said third group of lock teeth is engaged with said first longitudinal rack of lock teeth and said second longitudinal rack of lock teeth to prevent the proximal and distal movement of said articulation actuator; and
a closure member configured to move said first jaw toward said closed position during a closure stroke, wherein said closure member is configured to engage said articulation lock during said closure stroke and move said articulation lock from said disengaged position into said engaged position.
2. The surgical instrument of claim 1 , wherein said first longitudinal rack of lock teeth is defined in a first plane, wherein said second longitudinal rack of lock teeth is defined in a second plane, and wherein said first plane and said second plane are different.
3. The surgical instrument of claim 1 , wherein said end effector further comprises a staple cartridge comprising staples removably stored therein.
4. The surgical instrument of claim 3 , wherein said staple cartridge is replaceable.
5. The surgical instrument of claim 3 , wherein said first jaw comprises said staple cartridge.
6. The surgical instrument of claim 3 , wherein said second jaw comprises said staple cartridge.
7. The surgical instrument of claim 1 , wherein said first longitudinal rack of lock teeth comprises teeth spaced at a first pitch, wherein said second longitudinal rack of lock teeth comprises teeth spaced at a second pitch, wherein said second pitch is different than said first pitch, wherein said third group of lock teeth comprises teeth spaced at a third pitch, and wherein said third pitch is different than said first pitch and said second pitch.
8. The surgical instrument of claim 1 , wherein said shaft defines a longitudinal axis, wherein said articulation lock comprises a lock plate slidable laterally relative to said longitudinal axis between said disengaged position and said engaged position, wherein said frame comprises a proximal guide post and a distal guide post, wherein said lock plate comprises a proximal lateral slot and a distal lateral slot, wherein said proximal guide post extends into said proximal lateral slot and said distal guide post extends into said distal lateral slot, and wherein said proximal guide post and said distal guide post co-operate to define a lateral path of said lock plate.
9. The surgical instrument of claim 8 , wherein said lock plate comprises a lock slot including sidewalls defined therein, wherein said closure member comprises a lock driver extending into said lock slot, and wherein said lock driver is configured to engage a said sidewall to shift said lock plate from said disengaged position to said engaged position during said closure stroke.
10. The surgical instrument of claim 9 , wherein said closure member is movable through a retraction stroke to allow said first jaw to be moved into said open position, and wherein said lock driver is configured to engage a said sidewall to shift said lock plate from said engaged position to said disengaged position during said retraction stroke.
11. The surgical instrument of claim 9 , wherein said closure member is movable through an opening stroke to move said first jaw into said open position, and wherein said lock driver is configured to engage a said sidewall to shift said lock plate from said engaged position to said disengaged position during said opening stroke.
12. The surgical instrument of claim 1 , wherein said articulation lock comprises a lock arm deflectable into said engaged position by said closure member.
13. The surgical instrument of claim 1 , wherein said articulation lock comprises a first lock arm and a second lock arm, and wherein said closure member comprises a wedge positionable between said first lock arm and said second lock arm during said closure stroke to deflect said articulation lock into said engaged position.
14. The surgical instrument of claim 13 , wherein said third group of lock teeth are present on said first lock arm and said second lock arm.
15. The surgical instrument of claim 14 , wherein said first lock arm is configured to engage said first longitudinal rack of lock teeth and said second lock arm is configured to engage said second longitudinal rack of lock teeth.
16. A surgical instrument, comprising:
an end effector comprising a first jaw and a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and
a shaft, comprising:
a frame;
a lock plate movable relative to said frame, wherein said lock plate comprises a first group of lock teeth;
an articulation joint, wherein said end effector is rotatably connected to said shaft by said articulation joint;
an articulation actuator operably connected to said end effector, wherein said articulation actuator is configured to rotate said end effector in a first direction and a second direction, and wherein said articulation actuator comprises a second group of lock teeth;
an articulation lock comprising a third group of lock teeth, wherein said articulation lock is positionable in a disengaged position in which said third group of lock teeth is not engaged with said lock plate, said frame, and said articulation actuator and an engaged position in which said third group of lock teeth is engaged with said first group of lock teeth and said second group of lock teeth to inhibit the articulation of said end effector; and
a closure member configured to move said first jaw toward said closed position during a closure stroke, wherein said closure member is configured to engage said articulation lock during said closure stroke and move said articulation lock from said disengaged position into said engaged position.
17. The surgical instrument of claim 16 , wherein said end effector further comprises a staple cartridge including staples removably stored therein.
18. A surgical instrument, comprising:
an end effector comprising a first jaw and a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and
a shaft, comprising:
a frame, wherein said frame comprises a first group of teeth positioned directly on said frame;
an articulation joint, wherein said end effector is rotatably connected to said shaft by said articulation joint;
an articulation actuator operably connected to said end effector, wherein said articulation actuator is configured to rotate said end effector in a first direction and a second direction;
an articulation lock comprising a gear including a second group of teeth meshingly engaged with said first group of teeth, wherein said gear is rotatably mounted to said frame; and
a closure member configured to move said first jaw toward said closed position during a closure stroke, wherein said closure member is configured to engage said gear during said closure stroke to inhibit said end effector from being articulated.
19. The surgical instrument of claim 18 , wherein said end effector further comprises a staple cartridge including staples removably stored therein.
20. A surgical instrument, comprising:
an end effector comprising a first jaw and a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and
a shaft, comprising:
a frame;
a lock plate movable relative to said frame, wherein said lock plate comprises a first group of coupling features;
an articulation joint, wherein said end effector is rotatably connected to said shaft by said articulation joint;
an articulation actuator operably connected to said end effector, wherein said articulation actuator is configured to rotate said end effector in a first direction and a second direction, and wherein said articulation actuator comprises a second group of coupling features;
an articulation lock comprising a third group of coupling features, wherein said articulation lock is positionable in a disengaged position in which said third group of coupling features is not engaged with said lock plate and said articulation actuator and an engaged position in which said third group of coupling features is engaged with said first group of coupling features and said second group of coupling features to inhibit the articulation of said end effector; and
a closure member configured to move said first jaw toward said closed position during a closure stroke, wherein said closure member is configured to engage said articulation lock during said closure stroke and move said articulation lock from said disengaged position into said engaged position.
21. A surgical instrument, comprising:
an end effector comprising a first jaw and a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and
a shaft, comprising:
a frame;
a grounding member movable relative to said frame;
an articulation joint, wherein said end effector is rotatably connected to said shaft by said articulation joint;
an articulation actuator operably connected to said end effector, wherein said articulation actuator is configured to rotate said end effector in a first direction and a second direction;
an articulation lock positionable in a disengaged position in which said articulation lock is not engaged with said grounding member and said articulation actuator and an engaged position in which said articulation lock is engaged with said grounding member and said articulation actuator to inhibit the articulation of said end effector; and
a closure member configured to move said first jaw toward said closed position during a closure stroke, wherein said closure member is configured to engage said articulation lock during said closure stroke and move said articulation lock from said disengaged position into said engaged position.