Driving device for endoscopic cutting anastomatTechnical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a driving device for an endoscopic cutting anastomat.
Background
The endoscopic cutting anastomat is an instrument which can drive a plurality of anastomat nails which are staggered into human tissues into a straight line and cut off the tissues among the anastomat lines by a cutting knife, is also one of instruments which are widely applied to minimally invasive surgery and is mainly used for cutting, transection and anastomosis of tissues in abdominal surgery, gynecology, pediatrics and chest surgery open or endoscopic surgery.
As shown in fig. 1 to 5, the endoscopic incision anastomat in the prior art comprises a driving device 2, wherein the driving device 2 comprises a shell 2-1 provided with a handle 2-1-1, a trigger 2-2 rotatably arranged on the shell 2-1, a rack 2-3 arranged in the shell 2-1 and a driving block 2-4 connected between the trigger 2-2 and the rack 2-3, the driving block 2-4 is rotatably arranged on the trigger 2-2 through a driving pin 2-6, a driving torsion spring 2-7 is arranged between the driving block 2-4 and the trigger 2-2, a trigger torsion spring 2-8 is arranged between the trigger 2-2 and the handle 2-1-1, and the trigger 2-2 is pulled to realize that the driving block 2-4 is matched with the rack 2-3 to drive the rack 2-3 to move forwards (the arm direction is the rear and the gun barrel direction is the front); a stop flashboard 2-10-1 is arranged in the shell 2-1, a flashboard groove 2-3-2 matched with the stop flashboard 2-10-1 is arranged at the bottom end of the rack 2-3, a limit step 2-3-2-1 is arranged at the rear side of the flashboard groove 2-3-2, the limit step 2-3-2-1 blocks the stop flashboard 2-10-1 to prevent the rack 2-3 from moving forwards, a deep groove 2-10-1-1 and two shallow grooves 2-10-1-2 are outwards extended from the side surface of the stop flashboard 2-10-1, the two shallow grooves 2-10-1-2 are respectively positioned at two sides of the deep groove 2-10-1-1, the side surface of the shell 2-1 is provided with a switching button 2-9-1 near the trigger 2-2, the shell 2-1 is provided with a semicircular protection fence 2-1-3 for protecting the switching button 2-9-1, the switching button 2-9-1 is outwards extended with a convex block 2-9-1-3, the switching button 2-9-1 is sleeved with two switching springs 2-9-4, the two switching springs 2-9-4 are respectively positioned at two sides of the convex block 2-9-1-3, when the switching button 2-9-1 is at an initial position, the convex block 2-9-1-3 is positioned in the deep groove 2-10-1-1, at the moment, the stop flashboard 2-10-1 is positioned in the flashboard groove 2-3-2, the limiting step 2-3-2-1 blocks the stop flashboard 2-10-1 to prevent the rack 2-3 from moving forwards, the switching button 2-9-1 is pressed, the convex block 2-9-1-3 is switched between the two shallow grooves 2-10-1-2, when the convex block 2-9-1-3 is positioned in the shallow grooves 2-10-1-2, the stop flashboard 2-10-1 is separated from the limiting step 2-3-2-1, the rack 2-3 moves forwards under the stirring of the driving block 2-4, and at the moment, the stop flashboard 2-10-1 is matched with the tooth shape of the rack 2-3 to limit the rack 2-3 to retreat; the front end of the rack 2-3 is connected with the jaw assembly 3 through a driving rod 4-2 to control the formation of the anastomotic nail and the movement of the cutting knife to perform the anastomotic operation on the tissues.
The switch button 2-9-1 in the prior art is of a pressing type structure, is arranged on the side surface of the shell 2-1 close to the trigger 2-2, has limited space and inconvenient operation, and is easy to touch other surgical instruments at the surgical position in the surgical operation process, so that the surgical risk is increased; the semicircular protective fence 2-1-3 is arranged on the shell 2-1 to protect the switch button 2-9-1 from misoperation in the operation process, but when the switch button 2-9-1 needs to be operated, a small space is reserved, the switch button 2-9-1 is difficult to be accurately pressed in place at a time, and great inconvenience is brought to the operation.
The prior art has a complex switching structure for limiting the movement of the rack 2-3, the convex blocks 2-9-1-3 act on the deep groove 2-10-1-1 and the shallow groove 2-10-1-2, and the backstop flashboard 2-10-1 not only needs to realize the function of preventing the rack 2-3 from moving forwards in a closing mode of the jaw assembly 3, but also needs to realize the function of preventing the rack 2-3 from retreating due to tissue cutting resistance in a firing mode; because the depth of the shallow groove 2-10-1-2 is shallow, the convex block 2-9-1-3 is easy to slip off, and the normal use of the anastomat is affected; because the rack 2-3 needs to be abutted against the driving rod 4-2, the strength of the rack 2-3 is considered, the depth of the flashboard groove 2-3-2 is limited, the depth of the limiting step 2-3-2-1 is limited, the limiting step 2-3-2-1 is limited to block the anti-back flashboard 2-10-1, the effect of preventing the rack 2-3 from moving forwards is limited, the rack 2-3 is easy to arch under the action of the driving block 2-4, the anti-back flashboard 2-10-1 is easy to break away from the limitation of the flashboard groove 2-3-2, and the reliability of preventing the rack 2-3 from moving forwards is poor.
Disclosure of Invention
The invention provides a driving device for an endoscopic cutting anastomat, which aims to solve the problems that a switching structure is arranged on the side face of a shell, the structure is complex, the switching operation is inconvenient and the switching function is unstable in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is that the driving device for the endoscopic cutting anastomat comprises a jaw assembly and a sleeve assembly, wherein the sleeve assembly comprises a driving rod, the driving device comprises a shell, a trigger rotatably arranged on the shell, a rack arranged in the shell, a driving block and a switching part, the driving block is connected between the trigger and the rack, the driving block is rotatably arranged on the trigger, the front end of the driving block is provided with a poking piece matched with the tooth shape of the rack, the driving block is pulled to be matched with the rack to drive the rack to move forwards, and the rack is connected with the jaw assembly through the driving rod;
The switching part comprises a switching button arranged above the rear end of the shell and a switching limiting block rotatably arranged in the shell, a limiting long groove is formed in the rack, a switching torsion spring is arranged between the switching limiting block and the shell, the switching torsion spring acts on the switching limiting block to enable a boss at the rear end of the switching limiting block to be inserted into the limiting long groove, a switching inclined block is arranged at the bottom end of the switching button, and when the switching button is pushed forwards, the inclined surface of the switching inclined block pushes the boss to enable the switching limiting block to rotate, and the boss is separated from the limiting long groove.
Preferably, an anti-slip slot is arranged on the switching button. The operation reliability and the comfort level of the anastomat are improved, the customer experience is greatly improved, and the operation risk is reduced.
Preferably, the driving device further comprises a retaining component, the retaining component comprises a retaining flashboard and a retaining torsion spring, the retaining flashboard and the retaining torsion spring are arranged in the shell, a flashboard groove matched with the retaining flashboard is formed in the bottom surface of the front end of the rack, the rear wall of the flashboard groove is a slope inclined backwards, the tooth shape of the rack is a helical tooth matched with the retaining flashboard and inclined backwards, and the top end of the retaining torsion spring is clamped into the flashboard groove to provide resilience force. The trigger is pulled, the pulling piece and the tooth form of the rack are matched to drive the rack to move forwards, the top end of the retaining flashboard slides through the flashboard groove and the tooth form of the rack, the rack is effectively prevented from retreating, the structure is reasonable and reliable, and the operation risk is reduced.
Further, the driving device further comprises a reset part, the reset part comprises a retracting button, a reset plate, a retracting and elastic element, a guide pin is fixed on the side face of the rack, a backward inclined guide waist-shaped hole is formed in the reset plate, the retracting and connecting the rack, the reset plate and the retracting button together, the guide pin penetrates through the guide waist-shaped hole, one end of the elastic element is fixed on the retracting and the other end of the elastic element is fixed on the rack, a retracting long groove matched with the retracting button is formed in the shell, the direction of the retracting long groove is consistent with the moving direction of the rack, when the retracting button is pulled backwards, the elastic element is in an extension state, the reset plate presses the retracting stop gate plate, the retracting stop gate plate is separated from the tooth shape of the gate groove or the rack, and meanwhile the rack moves backwards. When the retracting button is released, the elastic element drives the reset plate to spring, the reset plate is separated from the retaining flashboard, the top end of the retaining flashboard is clamped into the tooth shape of the rack again, the rack is prevented from retracting, and the reset component is simple and ingenious in structure, convenient to operate and low in cost.
Preferably, the driving device further comprises a tension spring, a handle is arranged below the shell, a pulling hole is formed in the rear end of the driving block, a drag hook at one end of the tension spring is hooked into the pulling hole, and a drag hook at the other end of the tension spring hooks the lower portion of the handle. The tension spring simultaneously provides resilience force for rotation of the driving block and the trigger, and has simple and reliable structure, simple and convenient assembly and lower cost.
The beneficial effects are that: the driving device for the endoscopic cutting anastomat is characterized in that the switching button is arranged above the rear end of the shell, so that the driving device has a larger design space, is convenient to operate, does not touch any instrument with the switching button in the operation process of the handheld anastomat, ensures the safety of the anastomat in the use process, and reduces the operation risk; an anti-skid groove is arranged on the switching button, so that the operation reliability and comfort of the anastomat are improved, the customer experience is greatly improved, and the operation risk is reduced; the boss of the limiting block is inserted into the limiting long groove, the rear wall of the limiting long groove props against the boss, the effective area is larger, the stress is more reliable, and when the rack arches under the action of the driving block, the backstop flashboard cannot be separated from the limitation of the flashboard groove, so that the use effectiveness and stability of the anastomat are improved; compared with the prior art that the switching button is arranged on the side face of the shell, the driving device for the endoscopic cutting anastomat is arranged above the rear end of the shell, and the switching structure provides more anastomat selection for doctors according to use habits and is convenient to operate.
Drawings
FIG. 1 is a schematic perspective view of a prior art endoscopic incision stapler;
FIG. 2 is an exploded schematic view of a prior art drive device;
FIG. 3 is a schematic view of a prior art backstop ram mated with a rack;
FIG. 4 is a schematic perspective view of a prior art check gate;
fig. 5 is a schematic perspective view of a prior art switch button;
FIG. 6 is a schematic perspective view of the drive device of the present invention assembled to an endoscopic incision stapler;
FIG. 7 is an exploded schematic view of the drive device of the present invention;
FIG. 8 is an exploded schematic view of the sleeve assembly of the present invention;
FIG. 9 is a schematic cross-sectional view of the drive device of the present invention (with the housing not shown);
Fig. 10 is a schematic view of the internal perspective structure of the driving device of the present invention;
fig. 11 is a schematic view of the internal perspective structure of the driving device of the present invention (wherein the housing is not shown);
FIG. 12 is an exploded view of a steering device according to a second embodiment of the present invention;
Fig. 13 is a partially cross-sectional schematic view of a three-dimensional structure of a steering device according to a third embodiment of the present invention (in which a lower swivel head is not illustrated);
fig. 14 is an exploded view of a steering device according to a third embodiment of the present invention;
FIG. 15 is a schematic perspective view of an upper rotary head according to a third embodiment of the present invention;
FIG. 16 is a schematic perspective view of a knob according to a third embodiment of the invention;
FIG. 17 is a schematic perspective view of a non-return plate according to a third embodiment of the present invention;
FIG. 18 is a schematic perspective view of a toothed disc according to a third embodiment of the present invention;
In the figure, 1, a steering device, 1-1, an upper rotating head, 1-1-1, a steering cover, 1-1-2, a limit ring groove, 1-1-3, a bayonet, 1-1-4, a shifting block groove, 1-1-5, a knob rotating shaft, 1-2, a lower rotating head, 1-3, a rotating shaft, 1-3-1, a limit disc, 1-3-2, a groove, 1-3, a rotating pin, 1-4, a fluted disc, 1-4-1, a tooth socket, 1-4-2, a clamping protrusion, 1-4-3, a countersink, 1-5, a non-return plate, 1-5-1, a convex rib, 1-5-2, a first hole, 1-6, a knob, 1-6-1 and a limit boss, 1-6-2, a second hole, 1-6-3, a protruding shaft, 1-7, a wave spring, 1-8, a shifting block, 1-8-1, a long groove, 1-9, a shifting plate, 1-9-1, a chute, 1-10, a knob pin, 1-11, a drag hook, 1-11-1, a drag hook groove, 1-11-2, a drag hook head, 1-11-3, a protruding pin, 1-11-4, a guide arm, 2, a driving device, 2-1, a housing, 2-1-1, a handle, 2-1-1, a fixed column, 2-1-2, a retracting long groove, 2-1-3, a protective fence, 2-2, a trigger, 2-3, a rack, 2-3-1, a limiting long groove, 2-3-2, a flashboard groove, 2-3-2-1, a limiting step, 2-3-3, a safety groove, 2-4, a driving block, 2-4-1, a pulling piece, 2-4-2, a pulling hole, 2-5, a tension spring, 2-6, a driving pin, 2-7, a driving torsion spring, 2-8, a trigger torsion spring, 2-9, a switching part, 2-9-1, a switching button, 2-9-1-1, a switching inclined block, 2-9-1-2, an anti-skid groove, 2-9-1-3, a bump, 2-9-2, a switching limiting block, 2-9-2-1, a boss, 2-9-3 and a switching torsion spring, 2-9-4 parts, a switching spring, 2-10 parts, a retaining part, 2-10-1 parts, a retaining flashboard, 2-10-1 parts, a deep groove, 2-10-1-2 parts, a shallow groove, 2-10-2 parts, a retaining torsion spring, 2-11 parts, a resetting part, 2-11-1 parts, a retracting button, 2-11-2 parts, a resetting plate, 2-11-3 parts, a guiding kidney-shaped hole, 2-11-4 parts, a retracting button, 2-11-5 parts, an elastic element, 2-11-6 parts, a guiding pin, 2-11-7 parts, a resetting hook, 2-12 parts, 2-12-1 parts, a push rod, 2-12-2 parts, a safety block, 2-12-3 parts, a guiding waist-shaped hole, 2-11-4 parts, a retracting button, 2-11-5 parts, an elastic element, 2-11-6 parts, a guiding pin, 2-11-7 parts, a resetting hook, 2-12 parts, a push rod, 2-12-3 parts, a safety block, the safety torsion spring, 3, the jaw assembly, 4, the sleeve assembly, 4-1, the joint connection board, 4-1-1, the joint connection board hook head, 4-1-2, the square hole, 4-2, the driving rod, 4-3, the guide plate, 4-4, the inner pushing tube, 4-5 and the pushing tube.
Detailed Description
Example 1
As shown in fig. 6 to 11, a driving device for an endoscopic incision anastomat, the anastomat comprises a jaw assembly 3 and a sleeve assembly 4, the sleeve assembly 4 comprises a driving rod 4-2, the driving device 2 comprises a shell 2-1, a trigger 2-2 rotatably arranged on the shell 2-1, a rack 2-3 arranged in the shell 2-1, a driving block 2-4 and a switching part 2-9, the driving block 2-4 is connected between the trigger 2-2 and the rack 2-3, the driving block 2-4 is rotatably arranged on the trigger 2-2, the front end of the driving block 2-4 is provided with a pulling piece 2-4-1 (the arm direction is the rear, the barrel direction is the front), the driving device 2 also comprises a tension spring 2-5, a handle 2-1-1 is arranged below the shell 2-1, the rear end of the driving block 2-4 is provided with a pulling hole 2-4-2, one end of the tension spring 2-5 is hooked into the pulling hook 2-4 at one end of the handle 2-4, the pulling hook 2-4 is hooked into the rack 2-3 through the pulling hook 2-3, and the other end of the pulling block 2-4 is in the front direction of the pulling rod 2-3, and the pulling rod 2-3 is matched with the pulling rod 2-3 (the arm direction is the front, the front end of the pulling rod 2-3 is matched with the pulling rod 2-3) and the pulling rod 2-3 is provided with the pulling rod 2-2;
The switching component 2-9 comprises a switching button 2-9-1 arranged above the rear end of the shell 2-1 and a switching limiting block 2-9-2 rotatably arranged in the shell 2-1, a limiting long groove 2-3-1 is formed in the rack 2-3, a switching torsion spring 2-9-3 is arranged between the switching limiting block 2-9-2 and the shell 2-1, the switching torsion spring 2-9-3 acts on the switching limiting block 2-9-2 to enable a boss 2-9-2-1 at the rear end of the switching limiting block 2-9-2 to be inserted into the limiting long groove 2-3-1, a switching inclined block 2-9-1 is arranged at the bottom end of the switching button 2-9-1, and when the switching button 2-9-1 is pushed forwards, an inclined plane of the switching inclined block 2-9-1 pushes the boss 2-9-2-1 to enable the switching limiting block 2-9-2 to rotate, and the boss 2-9-2-1 is separated from the limiting long groove 2-3-1. In order to push the switch button 2-9-1 more comfortably and effectively, an anti-skid groove 2-9-1-2 is arranged on the switch button 2-9-1.
As shown in fig. 7, 9,10 and 11, the driving device 2 further comprises a retaining component 2-10, the retaining component 2-10 comprises a retaining flashboard 2-10-1 and a retaining torsion spring 2-10-2 which are arranged in a shell 2-1, a flashboard groove 2-3-2 matched with the retaining flashboard 2-10-1 is formed in the bottom surface of the front end of the rack 2-3, the rear wall of the flashboard groove 2-3-2 is a slope inclined backwards, the tooth shape of the rack 2-3 is a helical tooth matched with the retaining flashboard 2-10-1 and the top end of the retaining torsion spring 2-10-2, which is clamped into the flashboard groove 2-3-2, provides a rebound force.
As shown in fig. 7 to 11, the driving device 2 further comprises a reset component 2-11, the reset component 2-11 comprises a retracting button 2-11-1, a reset plate 2-11-2, a retracting button 2-11-4 and an elastic element 2-11-5, a guide pin 2-11-6 is fixed on the side surface of the rack 2-3, a backward inclined guide waist-shaped hole 2-11-3 is formed in the reset plate 2-11-2, the retracting button 2-11-4 connects the rack 2-3, the reset plate 2-11-2 and the retracting button 2-11-1 together, one end of the elastic element 2-11-5 is fixed on the retracting button 2-11-4 through a reset hook 2-11-7, a retracting groove 2-1-2 matched with the retracting button 2-11-1 is formed in the shell 2-1, and when the rack 2-3 is pulled down by the retracting button 2-11-3, the guide pin 2-11-6 is pulled through the guide waist-shaped hole 2-11-3, and one end of the elastic element 2-11-5 is fixed on the retracting button 2-11-4, and when the retracting button 2-1 is pulled down by the rack 2-1 or the retracting button 2-3, and the retracting button 2-1 is pulled down in the direction of the retracting button 2-3.
As shown in fig. 7 to 11, the driving device 2 further comprises a safety component 2-12, the safety component 2-12 comprises a push rod 2-12-1 and a rotatable safety block 2-12-2 which are arranged in the shell 2-1, the front end of the rack 2-3 is provided with a safety groove 2-3-3, a safety torsion spring 2-12-3 is arranged between the shell 2-1 and the safety block 2-12-2, the safety torsion spring 2-12-3 acts on the safety block 2-12-2 to enable one end of the safety block 2-12-2 to be inserted into the safety groove 2-3-3, so that the movement of the rack 2-3 is limited, a push rod 2-12-1 spring is arranged between the push rod 2-12-1 and the shell 2-1, when the push rod 2-12-1 contacts with the safety block 2-12-2, the push rod 2-12-1 spring is in a compressed state, one end of the push rod 2-12-2 is pushed backwards to rotate, one end of the push rod 2-12-2 is enabled to be separated from the safety groove 2-3-2, and the movement of the safety block 2-12-2 is not limited in the rack 2-3. The sleeve assembly 4 is firstly butted to the driving device 2, then the jaw assembly 3 is butted to the sleeve assembly 4, when the jaw assembly 3 is butted to the sleeve assembly 4, the jaw assembly 3 pushes the guide plate 4-3, the inner push tube 4-4 and the push tube 4-5 which are sequentially connected in the sleeve to move backwards, the push tube 4-5 pushes the push rod 2-12-1 backwards, the safety block 2-12-2 is opened, and when the butt joint is completed, namely the jaw assembly 3 is not butted, the rack 2-3 and the driving rod 4-2 cannot be driven.
The working principle is as follows:
Docking of the endoscopic cutting anastomat: firstly, the sleeve assembly 4 is butted onto the driving device 2, then the jaw assembly 3 is butted onto the sleeve assembly 4, when the jaw assembly 3 is butted onto the sleeve assembly 4, the jaw assembly 3 pushes the guide plate 4-3, the inner pushing tube 4-4 and the pushing tube 4-5 which are sequentially connected in the sleeve to move backwards, the pushing tube 4-5 pushes the pushing rod 2-12-1 backwards, one end of the pushing rod 2-12-1 pushes the safety block 2-12-2 to rotate, one end of the safety block 2-12-2 is separated from the safety groove 2-3-3, at the moment, the safety block 2-12-2 does not limit the movement of the rack 2-3, and when the butt joint is completed, namely, the jaw assembly 3 is not butted, the rack 2-3 and the driving rod 4-2 cannot be driven;
The endoscopic cutting stapler is in a closed mode: the trigger 2-2 is triggered, the pulling piece 2-4-1 of the driving block 2-4 pushes the tooth shape of the rack 2-3 to enable the rack 2-3 to move forwards for a certain distance, the rack 2-3 is connected with the driving rod 4-2 to move forwards to finish the closing of the jaw assembly 3, the jaw clamps the tissue of the part to be operated, when the jaw assembly 3 is closed, the boss 2-9-2-1 at the rear end of the switching limiting block 2-9-2 abuts against the rear wall of the limiting long groove 2-3-1 and prevents the rack 2-3 from moving forwards, the tissue clamped by the jaw is confirmed, if the clamped tissue is inaccurate, the retracting button 2-11-1 is pulled backwards, the retracting button 2-11-4 connected with the retracting button 2-11-1 drives the reset plate 2-11-2 and the elastic element 2-11-5 to move in advance, the elastic element 2-11-5 stretches, the reset plate 2-11-2 moves along the guide kidney-shaped hole 2-11-3, the check flashboard 2-10-1 is pressed down, the check flashboard 2-10-1 is separated from the tooth form of the rack 2-3, the retracting button 2-11-1 is pulled backwards continuously, the rack 2-3 and the driving rod 4-2 are driven to move backwards, the jaw assembly 3 is opened again, the tissue of the part to be operated is clamped again, the operation is repeated, the problem that a doctor clamps the tissue repeatedly is solved, on one hand, the tissue is more easy to anastomose to ensure the operation quality, on the other hand, the doctor is convenient to confirm the operation part repeatedly, and in the process of repeatedly closing and opening the jaw assembly 3, the outflow of the anastomat is not affected;
the endoscopic cutting stapler is in a firing mode: when the operation position is confirmed, the switching button 2-9-1 is pushed forward, the inclined surface of the switching inclined block 2-9-1-1 pushes the boss 2-9-2-1 to enable the switching limiting block 2-9-2 to rotate, the boss 2-9-2-1 is separated from the limiting long groove 2-3-1, the trigger 2-2 is continuously buckled, the poking piece 2-4-1 of the driving block 2-4 pushes the tooth form of the rack 2-3 to enable the rack 2-3 to move forward so as to finish anastomotic nail forming, and the cutting knife moves to the far end to perform the anastomotic operation on tissues;
After the operation is finished, the retracting button 2-11-1 is pulled backwards, the retracting button 2-11-4 connected with the retracting button 2-11-1 drives the reset plate 2-11-2 and the elastic element 2-11-5 to move in advance, the elastic element 2-11-5 stretches, the reset plate 2-11-2 moves along the guiding kidney-shaped hole 2-11-3, the retaining flashboard 2-10-1 is pressed down, the retaining flashboard 2-10-1 is separated from the tooth shape of the rack 2-3, and the retracting button 2-11-1 is pulled backwards continuously to drive the rack 2-3 and the driving rod 4-2 to move backwards, so that the jaw assembly 3 is opened.
Example two
The present embodiment provides an endoscopic incision stapler comprising a steering device 1 and the drive device 2, cannula assembly 4 and jaw assembly 3 of the first embodiment.
As shown in FIG. 12, the steering device 1 is buckled between the sleeve assembly 4 and the driving device 2, the steering device 1 comprises an upper rotating head 1-1, a knob 1-6 and a shifting block 1-8, a shifting block groove 1-1-4 is arranged above the upper rotating head 1-1, the shifting block 1-8 is arranged in the shifting block groove 1-1-4, a knob rotating shaft 1-1-5 is fixed on the upper rotating head 1-1, the knob 1-6 is rotationally sleeved on the knob rotating shaft 1-1-5 and axially limited on the knob rotating shaft 1-1-5 through a knob pin 1-10, a convex shaft 1-6-3 extends below the knob 1-6, a long groove 1-8-1 matched with the convex shaft 1-6-3 is arranged above the shifting block 1-8, when the knob 1-6 is turned, the protruding shaft 1-6-3 drives the shifting block 1-8 to move left and right, the shifting plate 1-9 is fixed below the shifting block 1-8, the chute 1-9-1 is arranged on the shifting plate 1-9, the drag hook 1-11 is arranged below the upper rotating head 1-1, the protruding pin 1-11-3 matched with the chute 1-9-1 is fixed on the drag hook 1-11, the drag hook head 1-11-2 is arranged at the front end of the drag hook 1-11, the drag hook head 1-11-2 hooks the joint connecting plate 4-1, the steering rod of the jaw assembly 3 is clamped into the joint connecting plate head 4-1, so that the jaw assembly 3 is rigidly connected with the whole steering device 1, when the knob 1-6 rotates, the protruding shaft 1-6-3 drives the shifting block 1-8 to move left and right in the shifting block groove 1-1-4, the shifting plate 1-9 moves left and right in the shifting block groove 1-1-4 together with the shifting block 1-8, the chute 1-9-1 drives the protruding pin 1-11-3 of the draw hook 1-11 to enable the draw hook 1-11 to move back and forth (the arm direction is the back and the gun barrel direction is the front), and the draw hook 1-11 drives the joint connection plate 4-1 and the steering rod to move back and forth in sequence, so that swing control of the jaw assembly 3 is completed.
Example III
The present embodiment provides an endoscopic incision stapler comprising a steering device 1 and the drive device 2, cannula assembly 4 and jaw assembly 3 of the first embodiment.
As shown in fig. 13 to 18, the steering device 1 is buckled between the sleeve assembly 4 and the driving device 2, the steering device 1 comprises an upper rotating head 1-1, a steering cover 1-1-1 extends outwards on the upper rotating head 1-1, the steering cover 1-1 and the upper rotating head 1-1 are of an integral structure, and a lower rotating head 1-2 is buckled on the upper rotating head 1-1; the rotating shaft 1-3 is rotatably arranged on the upper rotating head 1-1, and a limiting disc 1-3-1 is arranged at the bottom end of the rotating shaft 1-3; the outer circumference of the fluted disc 1-4 is outwards extended with clamping protrusions 1-4-2, the upper rotary head 1-1 is provided with bayonets 1-1-3 matched with the clamping protrusions 1-4-2, so that the fluted disc 1-4 is circumferentially fixedly arranged in the upper rotary head 1-1, at least two clamping protrusions 1-4-2 are arranged for ensuring the circumferential fixation of the fluted disc 1-4, the width of one clamping protrusion 1-4-2 is larger than the width of the other clamping protrusions 1-4-2 for facilitating the assembly of the fluted disc 1-4, the top end of the fluted disc 1-4 is provided with a plurality of tooth sockets 1-4-1, and the bottom end of the fluted disc 1-4 is provided with countersunk holes 1-4-3 matched with the limiting discs 1-3-1; the non-return plate 1-5 is arranged on the rotating shaft 1-3, so that the non-return plate 1-5 rotates along with the rotating shaft 1-3, the non-return plate 1-5 is extended with a convex rib 1-5-1 matched with the tooth groove 1-4-1, and the convex rib 1-5-1 slides across the tooth groove 1-4-1 in the rotating process of the rotating shaft 1-3; the rotary shaft 1-3 is rotated by rotating the rotary knob 1-6, the rotary knob 1-6 is positioned above the steering cover 1-1, the steering cover 1-1 covers the non-return plate 1-5, and the rotary shaft 1-3 is rotated by rotating the rotary knob 1-6.
The rotary shaft 1-3 is further sleeved with a wave spring 1-7, the wave spring 1-7 is located between the non-return plate 1-5 and the steering cover 1-1, a gasket (not shown in the figure) is arranged between the non-return plate 1-5 and the wave spring 1-7, and a pretightening force is arranged between the non-return plate 1-5 and the fluted disc 1-4 under the elastic force of the wave spring 1-7, so that the rotary knob 1-6, the rotary shaft 1-3 and the non-return plate 1-5 can be stopped at the rotation angle due to the cooperation of the convex rib 1-5-1 and the toothed groove 1-4-1 when rotating for one angle of the toothed groove 1-4-1. In order to prevent the steering cover 1-1-1 from falling off and causing the internal parts such as the non-return plate 1-5 and the fluted disc 1-4 to fall off or scatter due to the elasticity of the wave spring 1-7, the steering cover 1-1 and the upper rotating head 1-1 are integrally formed by injection molding.
The steering cover 1-1-1 is provided with a limit ring groove 1-1-2, the bottom end of the knob 1-6 is extended with a limit boss 1-6-1, the limit boss 1-6-1 is inserted into the limit ring groove 1-1-2, and the angle of the limit ring groove 1-1-2 is selected to be 180 degrees, so that the maximum rotation angle of the knob 1-6 is 180 degrees, namely the swing angle of the jaw assembly 3 is limited.
The rotating shaft 1-3 is provided with a groove 1-3-2, the non-return plate 1-5 is provided with a first hole 1-5-2 with a first convex edge, the knob 1-6 is provided with a second hole 1-6-2 with a second convex edge, the non-return plate 1-5 and the knob 1-6 are respectively sleeved on the rotating shaft 1-3 through the first hole 1-5-2 and the second hole 1-6-2 in sequence, the first convex edge and the second convex edge are inserted into the groove 1-3-2, the knob 1-6 is axially fixed on the rotating shaft 1-3 through the knob pin 1-10, and the knob 1-6 is prevented from being separated from the rotating shaft 1-3, so that the rotating shaft 1-3, the non-return plate 1-5 and the knob 1-6 rotate and stop together.
The endoscopic incision anastomat further comprises a draw hook 1-11, a draw hook groove 1-11-1 is formed in the draw hook 1-11, a rotary pin 1-3-3 is fixed on the eccentric position of the rotary shaft 1-3, the rotary pin 1-3-3 is inserted into the draw hook groove 1-11-1, a draw hook head 1-11-2 is arranged at the front end of the draw hook 1-11, the draw hook head 1-11-2 hooks a square hole 4-1-2 of the joint connecting plate 4-1, a steering rod of the jaw assembly 3 is clamped into the hook head 4-1-1 of the joint connecting plate, the rotary shaft 1-3 rotates, the draw hook 1-11 is driven to move forwards and backwards (the arm direction is the rear, the gun barrel direction is the front) through the rotary pin 1-3, the draw hook 1-11 sequentially drives the joint connecting plate 4-1 and the steering rod to move forwards and backwards, left and right swinging control of the jaw assembly 3 is completed, and the swinging direction of the jaw assembly 3 is consistent with the rotating direction of the knob 1-6. Guide arms 1-11-4 extend downwards from two sides of the drag hook 1-11, guide arm grooves matched with the guide arms 1-11-4 are formed in the lower rotating head 1-2, the two guide arms 1-11-4 improve the moving precision of the drag hook, the drag hook head 1-11-2 is effectively prevented from being separated from the square hole 4-1-2, and the usability of the anastomat is improved.