CN113133794B

CN113133794B - Disposable linear anastomat for intestinal tract tail end

Info

Publication number: CN113133794B
Application number: CN202110520667.4A
Authority: CN
Inventors: 侯仲麟; 陆春明
Original assignee: Suzhou Youmai Medical Technology Co ltd
Current assignee: Suzhou Youmai Medical Technology Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2022-05-24
Anticipated expiration: 2041-05-13
Also published as: CN113133794A

Abstract

The invention relates to the technical field of anastomats, and discloses a disposable linear anastomat for intestinal tract tail ends. The invention has simple and reliable structure by utilizing the mutual meshing of the worm wheel and the worm, and can effectively avoid the situation of automatic reset after the positioning rod is pushed out; the card strip through percussion board upper surface can drive the card wheel clockwise rotation certain direction back, can block fast under the effect of torsional spring and advance in the card strip, effectually avoided at percussion propulsive in-process, because frequent locking and unblock percussion board that the adjusting position brought, through the cooperation of card wheel and card strip to the automatic locking of percussion board at the in-process of advancing more effectively, improved the security in the operation process, reduced wrong probability.

Description

Disposable linear anastomat for intestinal tract tail end

Technical Field

The invention relates to the technical field of anastomats, in particular to a disposable linear anastomat for an intestinal tract tail end.

Background

The anastomat is the first stapler in the world and is used for gastrointestinal anastomosis for nearly a century, and the tube-type anastomat is not widely used for gastrointestinal surgery until 1978. Generally, the anastomat is divided into a disposable anastomat or a multi-use anastomat, an imported anastomat or a domestic anastomat. Due to the development of modern science and technology and the improvement of manufacturing technology, the anastomat used clinically has the advantages of reliable quality, convenient use, tightness, proper tightness, quick suturing, simple and convenient operation, few side effects and surgical complications and the like. Staplers are devices used in medicine to replace manual suturing, the main working principle being the detachment or anastomosis of tissue by titanium staples, similar to staplers. According to different application ranges, the surgical stapler can be mainly divided into a skin stapler, a circular stapler for digestive tracts (esophagus, stomach and intestine and the like), a rectal stapler, a circular hemorrhoid stapler, a circumcision stapler, a blood vessel stapler, a hernia stapler, a lung cutting stapler and the like.

When the linear anastomat sews the cutting position, the stability of the positioning pin is extremely important, if the positioning pin cannot accurately play a positioning role, the sewing failure of the cutting surface is easily caused, and in the existing pushing mode of the positioning pin, the positioning pin has the risk of automatic resetting after being pushed out; in addition, when suturing is carried out, after a nail pushing plate in the nail bin needs to be triggered to move forward partially, the suturing position is adjusted, secondary triggering is carried out again, the suturing is completed, when the position is adjusted, the triggering device needs to be locked, and after the position is adjusted, the locking is released again to carry out triggering and suturing, so that the operation is complex, and the error rate is high.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a disposable linear anastomat for the tail end of an intestinal tract, which has the advantages of simple operation, low error rate and the like, and solves the problems of complex operation, high error rate and the risk of automatic reset of a positioning pin after being pushed out.

(II) technical scheme

In order to solve the technical problems of complex operation, high error rate and automatic resetting risk of the positioning pin after being pushed out, the invention provides the following technical scheme:

a disposable linear anastomat for intestinal tract tail ends comprises a main body, wherein a first supporting plate and a second supporting plate are fixedly connected to the inner wall of the main body, a firing plate penetrates through and is connected with the first supporting plate in a sliding mode, a clamping strip and a rack are respectively arranged in the middle of the upper surface and the lower surface of the firing plate, a T-shaped block is fixedly connected to one end, far away from the first supporting plate, of the upper surface of the firing plate, a T-shaped groove is formed in one side, close to the T-shaped block, of the top of the inner wall of the main body, the T-shaped groove is connected with the T-shaped block in a sliding mode, a connecting port is formed in one side, close to the T-shaped groove, of the upper surface of the main body, an automatic locking device is fixedly connected with the clamping strip in a clamping mode, firing shafts are rotatably connected to two sides of the inner wall of the main body, and gears penetrate through and are fixedly connected to the middle of the firing shafts, the gear with the percussion board lower surface the rack meshes mutually, the percussion axle is located the part fixedly connected with runner between gear and main part inner wall one side, runner fixedly connected with presses the depression bar, the indent has been seted up to one side of main part, press the indent to run through and sliding connection press the depression bar, the percussion board is close to the one end fixedly connected with push pedal of backup pad one, the push pedal is kept away from one side middle part fixedly connected with percussion bar of percussion board, the percussion bar runs through backup pad two, the last fixed surface of main part is connected with positioner, one side fixedly connected with nail seat of main part, the nail seat is close to one side upper portion of main part has seted up the locating hole

Preferably, automatic locking device includes the shell, the inner wall both sides of shell are rotated and are connected with the locking axle, the middle part fixedly connected with card wheel of locking axle, the equal fixedly connected with torsional spring in both sides of card wheel, the torsional spring is kept away from the one end fixed connection of card wheel is in on the inner wall of shell, inner wall one side of shell is run through and is rotated and be connected with the camshaft, the camshaft is kept away from the one end fixedly connected with knob of shell, the camshaft is located middle part position fixedly connected with cam in the shell, the card wheel with card strip looks joint.

Preferably, the positioning device comprises a positioning box, a first positioning plate and a second positioning plate are respectively and fixedly connected with two ends of the inner wall of the positioning box, the positioning plate penetrates through the positioning plate and is rotatably connected with a positioning shaft, one end of the positioning shaft is fixedly connected with a worm wheel, the other end of the positioning shaft is fixedly connected with a threaded sleeve, one side of the upper surface of the positioning box, which is close to the worm wheel, is penetrated and rotatably connected with a worm, one end of the worm, which is far away from the positioning box, is fixedly connected with a knob II, the worm is meshed with the worm wheel, the inner wall of the threaded sleeve is in threaded connection with a screw rod, one end of the screw rod, far away from the threaded sleeve, is fixedly connected with a connecting plate, the connecting plate with the inner wall sliding connection of location case, the connecting plate is kept away from one side middle part fixedly connected with locating lever of screw rod, the locating lever runs through and sliding connection locating plate two, location case.

Preferably, a safety spring is fixedly connected to the middle of one side, close to the positioning rod, of the connecting plate, and one end, far away from the connecting plate, of the safety spring is fixedly connected to one side of the second positioning plate.

Preferably, the middle part of one side of the pushing plate far away from the triggering plate is fixedly connected with a return spring, one end of the return spring far away from the pushing plate is fixedly connected to the second supporting plate, and the return spring and the triggering rod are coaxial.

Preferably, the positioning rod and the positioning hole are coaxial, and the diameter of the end face of the positioning rod is equal to that of the end face of the positioning hole.

Preferably, a nail bin penetrates through one end, close to the second supporting plate, of the firing rod, and the nail bin is fixedly connected to the inner wall of the main body.

Preferably, the nail seat is provided with a nail groove, and the nail groove corresponds to the nail bin.

(III) advantageous effects

Compared with the prior art, the invention provides a disposable linear anastomat for the tail end of an intestinal tract, which has the following beneficial effects:

1. the worm is driven to rotate by rotating the second knob, the worm wheel is driven to rotate by meshing of the worm wheel and the worm, the threaded sleeve is driven to rotate by the positioning shaft, the screw is fixedly connected with the connecting plate, and the connecting plate is in sliding connection with the inner wall of the positioning box, so that the degree of freedom of the screw is limited, the screw is driven to move towards the second positioning plate under the action of threaded connection of the threaded sleeve and the screw, the connecting plate is driven to drive the positioning rod to move out of the positioning box to be matched with the positioning hole, positioning is completed, and the automatic resetting condition after the positioning rod is pushed out can be effectively avoided by utilizing mutual meshing of the worm wheel and the worm.

2. The invention effectively avoids the deformation caused by the extrusion of the nail seat by the positioning rod due to too much pushing of the positioning rod through the safety spring, and influences the positioning accuracy, thereby realizing the positioning of the anastomat before the suturing by matching with the positioning device, improving the stability of the suturing and increasing the success rate of the suturing.

3. According to the invention, the clamping strip on the upper surface of the trigger plate can drive the clamping wheel to rotate clockwise in a certain direction, and then the clamping wheel can be quickly clamped into the clamping strip under the action of the torsion spring, so that frequent locking and unlocking of the trigger plate caused by position adjustment in the trigger propulsion process can be effectively avoided, the trigger plate can be automatically locked in the advancing process more effectively through the matching of the clamping wheel and the clamping strip, the safety in the operation process is improved, and the error probability is reduced.

4. According to the invention, the T-shaped block on the upper surface of the trigger plate is in sliding connection with the T-shaped groove, so that the stability of the trigger plate in the propelling and triggering process is effectively improved, and meanwhile, the propelling stroke of the trigger plate is limited according to the length of the T-shaped groove.

5. According to the invention, after the clamping locking of the clamping wheel is released by the trigger plate through the reset spring, the trigger plate is quickly reset under the action of the elastic force of the reset spring through the connecting plate, and further the smooth resetting of the trigger rod is completed after the sewing.

Drawings

FIG. 1 is one of the three-dimensional structures of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a partial cross-sectional view of the present invention;

FIG. 5 is an exploded view of the positioning device of the present invention;

FIG. 6 is an exploded view of the automatic locking device of the present invention;

fig. 7 is a view showing the structure of the movement of the gears of the present invention.

In the figure: 1. a main body; 2. a first support plate; 3. a second support plate; 4. a trigger plate; 5. clamping the strip; 6. a rack; 7. a T-shaped block; 8. a T-shaped slot; 9. a connecting port; 10. an automatic locking device; 11. a firing shaft; 12. a gear; 13. a rotating wheel; 14. a pressing lever; 15. pressing the groove; 16. pushing the plate; 17. a firing bar; 18. a positioning device; 19. a nail seat; 20. positioning holes; 21. a housing; 22. a locking shaft; 23. clamping the wheel; 24. a torsion spring; 25. a camshaft; 26. a knob; 27. a cam; 28. a positioning box; 29. a first positioning plate; 30. a second positioning plate; 31. positioning the shaft; 32. a worm gear; 33. a worm; 34. a screw; 35. a connecting plate; 36. positioning a rod; 37. a safety spring; 38. a return spring; 39. a second knob; 40. a staple cartridge; 41. a nail groove; 42. and (4) a threaded sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As described in the background, the prior art has shortcomings, and in order to solve the above technical problems, the present application provides a disposable linear stapler for intestinal tract ends.

Referring to fig. 1-7, a disposable linear anastomat for intestinal tract tail end comprises a main body 1, wherein a first support plate 2 and a second support plate 3 are fixedly connected to the inner wall of the main body 1, a first support plate 2 is connected with a percussion plate 4 in a penetrating and sliding manner, a clamping strip 5 and a rack 6 are respectively arranged in the middle of the upper surface and the lower surface of the percussion plate 4, a T-shaped block 7 is fixedly connected to one end, far away from the first support plate 2, of the upper surface of the percussion plate 4, a T-shaped groove 8 is arranged on one side, close to the T-shaped block 7, of the top of the inner wall of the main body 1, the T-shaped groove 8 is connected with the T-shaped block 7 in a sliding manner, a connector 9 is arranged on one side, close to the T-shaped groove 8, of the upper surface of the main body 1, an automatic locking device 10 is fixedly connected to the upper surface of the connector 9, the automatic locking device 10 is clamped to the clamping strip 5, percussion shafts 11 are rotatably connected to two sides of the inner wall of the main body 1, a gear 12 is connected in a penetrating and fixedly connected to the middle of the percussion shafts 11, gear 12 meshes with rack 6 of 4 lower surfaces of trigger plate, the part fixedly connected with runner 13 that trigger axle 11 is located between gear 12 and 1 inner wall one side of main part, runner 13 fixedly connected with presses depression bar 14, one side of main part 1 has been seted up and has been pressed depression groove 15, depression groove 15 runs through and sliding connection presses depression bar 14, trigger plate 4 is close to the one end fixedly connected with push pedal 16 of backup pad 2, one side middle part fixedly connected with trigger bar 17 of trigger plate 4 is kept away from to push pedal 16, trigger bar 17 runs through backup pad two 3, the last fixed surface of main part 1 is connected with positioner 18, one side fixedly connected with nail seat 19 of main part 1, nail seat 19 has seted up locating hole 20 near one side upper portion of main part 1.

Further, for the above automatic locking device 10, the automatic locking device 10 includes a housing 21, two sides of an inner wall of the housing 21 are rotatably connected with a locking shaft 22, a middle portion of the locking shaft 22 is fixedly connected with a clamping wheel 23, two sides of the clamping wheel 23 are both fixedly connected with a torsion spring 24, one end of the torsion spring 24 away from the clamping wheel 23 is fixedly connected to the inner wall of the housing 21, one side of the inner wall of the housing 21 penetrates and is rotatably connected with a cam shaft 25, one end of the cam shaft 25 away from the housing 21 is fixedly connected with a knob 26, the middle position of the cam shaft 25 in the housing 21 is fixedly connected with a cam 27, the clamping wheel 23 is clamped with the clamping strip 5, so that the clamping wheel 23 is driven by the clamping strip 5 on the upper surface of the trigger plate 4 to rotate towards the feeding direction of the trigger plate 4, thereby the trigger plate 4 is moved in one direction to avoid the reset of the trigger plate 4, and the torsion spring 24 is twisted to generate an acting force due to the rotation of the clamping wheel 23, after the trigger plate 4 impels, torsional spring 24 makes card wheel 23 block fast in the card strip, avoids trigger plate 4 to reset, when needs trigger plate 4 resets, rotates knob 26, and then drives camshaft 25 and rotate to drive cam 27 and will block a round 23 jack-up, trigger plate 4 does not receive the joint of card wheel 23, resets fast under reset spring 38's effect. In addition, when specifically using, the principle of keeping away from similar ratchet backstop is used with the cooperation of card wheel 23 and card strip 5, and when specifically using, the elasticity coefficient of torsional spring 24 is enough to satisfy the people through rotating knob 26, and then drives camshaft 25 and rotate to drive cam 27 with calorie wheel 23 jack-up.

Further, for the above positioning device 18, the positioning device 18 includes a positioning box 28, two ends of an inner wall of the positioning box 28 are fixedly connected with a first positioning plate 29 and a second positioning plate 30, respectively, the first positioning plate 29 is connected with a positioning shaft 31 in a penetrating and rotating manner, one end of the positioning shaft 31 is fixedly connected with a worm gear 32, the other end of the positioning shaft 31 is fixedly connected with a threaded sleeve 42, one side of an upper surface of the positioning box 28, which is close to the worm gear 32, is connected with a worm 33 in a penetrating and rotating manner, one end of the worm 33, which is far away from the positioning box 28, is fixedly connected with a second knob 39, the worm 33 is meshed with the worm gear 32, a screw 34 is connected with an inner wall of the threaded sleeve 42 in a threaded manner, one end of the screw 34, which is far away from the threaded sleeve 42, is fixedly connected with a connecting plate 35, the connecting plate 35 is connected with the inner wall of the positioning box 28 in a sliding manner, a positioning rod 36 is fixedly connected with a middle portion of one side of the connecting plate 35, which is far away from the screw 34, and the positioning rod 36 penetrates and is connected with the second positioning plate 30 in a sliding manner, The positioning box 28 drives the worm 33 to rotate by rotating the knob two 39, and further drives the worm wheel 32 to rotate by the meshing of the worm wheel 32 and the worm 33, and further drives the threaded sleeve 42 to rotate by the positioning shaft 31, because the screw rod 34 is fixedly connected with the connecting plate 35, and the connecting plate 35 is in sliding connection with the inner wall of the positioning box 28, the degree of freedom of the screw rod 34 is limited, and further the screw rod 34 is driven to move towards the positioning plate two 30 under the threaded connection action of the threaded sleeve 42 and the screw rod 34, and further the connecting plate 35 is driven to drive the positioning rod 36 to move out of the positioning box 28 and match with the positioning hole 20, so as to complete positioning, and by utilizing the mutual meshing of the worm wheel 32 and the worm 33, the automatic resetting condition after the positioning rod 36 is pushed out can be effectively avoided, when the resetting is needed, the knob two 39 is reversely rotated, so that the threaded sleeve 42 is reversely rotated, and further the screw rod 34 is contracted in the threaded sleeve 42 through threaded connection, the retraction and resetting of the positioning rod 36 are realized.

Furthermore, for the connecting plate 35, a safety spring 37 is fixedly connected to the middle of one side of the connecting plate 35 close to the positioning rod 36, and one end of the safety spring 37, which is far away from the connecting plate 35, is fixedly connected to one side of the second positioning plate 30, so that the positioning rod 36 is effectively prevented from being pushed out too much by the safety spring 37, the nail holder 19 is extruded by the positioning rod 36, the deformation is caused, the positioning accuracy is influenced, and then the positioning device 18 is matched to realize the positioning of the anastomat before suturing, so that the stability of suturing is improved, and the success rate of suturing is increased. In addition, in specific application, the elastic coefficient of the safety spring 37 can meet the requirement that a person can normally turn the second knob 39, and meanwhile, a certain resistance effect can be achieved, and an in-place feedback effect can be achieved.

Further, for the above-mentioned push plate 16, the middle part of one side of the push plate 16 far from the trigger plate 4 is fixedly connected with a return spring 38, one end of the return spring 38 far from the push plate 16 is fixedly connected to the second support plate 3, the return spring 38 and the trigger rod 17 are coaxial, so that when the trigger plate 4 is pushed, the second support plate 30 is close to the connecting plate 35, the return spring 38 is further compressed, after the trigger plate 4 is separated from the connecting portion of the clamp wheel 23, the return spring 38 is compressed and deformed to have elastic force, the trigger plate 4 plays a rapid reset role through the elastic force of the return spring 38 via the connecting plate 35, and the trigger rod 17 is further reset smoothly after sewing. In addition, for a particular application, the press bar 14 should be released during the reset of the firing bar 17.

Further, in the positioning rod 36, the positioning rod 36 is coaxial with the positioning hole 20, and the diameter of the end surface of the positioning rod 36 is equal to the diameter of the end surface of the positioning hole 20, so that the positioning rod 36 can smoothly enter the positioning hole 20 to complete positioning by limiting the specification of the positioning rod 36 and the specification of the positioning hole 20.

Further, for the above-mentioned firing bar 17, a nail bin 40 penetrates through one end of the firing bar 17 close to the second support plate 3, and the nail bin 40 is fixedly connected to the inner wall of the main body 1, so that the pushing of the firing bar 17 drives the nail pushing plate in the nail bin 40 to advance, thereby completing suturing.

Further, for the staple holder 19, a staple groove 41 is formed in the staple holder 19, and the staple groove 41 corresponds to the staple cartridge 40, so that the firing rod 17 drives a staple pushing plate in the staple cartridge 40 to advance to press a staple penetrating and suturing part in the staple groove 41 to complete suturing.

The working principle is as follows: when the nail fixing device is used, the part between the nail seat 19 and the nail bin 40 is placed at a sewing position, then the worm 33 is driven to rotate by rotating the second knob 39, the worm wheel 32 is driven to rotate by meshing the worm wheel 32 and the worm 33, and the threaded sleeve 42 is driven to rotate by the positioning shaft 31; the worm wheel 32 and the worm 33 are meshed with each other, the situation that the positioning rod 36 is automatically reset after being pushed out can be effectively avoided, when the resetting is needed, the knob II 39 is rotated reversely, the threaded sleeve 42 is rotated reversely, the screw rod 34 is contracted in the threaded sleeve 42 through threaded connection, and the contraction resetting of the positioning rod 36 is achieved.

After the positioning is completed, the handle of the main body 1 and the pressing rod 14 are held by hand, the pressing rod 14 is gradually pressed in the pressing groove 15, thereby driving the percussion shaft 11 to rotate through the rotating wheel 13, further driving the gear 12 to rotate, the gear 12 rotates, the gear 12 is meshed with the rack in the middle of the lower surface of the firing plate 4 to drive the firing plate 4 to advance, when the suture is pushed for a half, the pressing rod 14 is released, the suture position is adjusted again, in the pushing process of the firing plate 4, the clamping strip on the upper surface of the firing plate 4 drives the clamping wheel 23 to rotate clockwise in a certain direction, the spring 24 can be quickly clamped into the clamping strip, thereby effectively avoiding the situation that in the process of percussion and propulsion, the frequent locking and unlocking of the firing plate 4 caused by position adjustment can more effectively automatically lock the firing plate 4 in the advancing process through the matching of the clamping wheel 23 and the clamping strip 5; after locking, the suturing position is adjusted and determined again, then the pressing rod 14 is pressed to the bottom, the pushing plate 16 is driven to move through the pushing of the firing plate 4, the firing rod 17 is driven to fire, and therefore the nail pushing plate in the nail bin 40 is driven to push suturing nails to suture the suturing parts.

In the process of propelling and exciting the trigger plate 4, the T-shaped block 7 on the upper surface of the trigger plate 4 is in sliding connection with the T-shaped groove 8, so that the stability of the trigger plate 4 in the process of propelling and triggering is effectively improved, and meanwhile, the propelling stroke of the trigger plate 4 is limited according to the length of the T-shaped groove 8;

after the sewing is finished, the knob 26 is rotated, and then the cam shaft 25 is driven to rotate, so that the cam 27 is driven to jack up the clamping wheel 23, the trigger plate 4 is not clamped by the clamping wheel 23, and the trigger plate is quickly reset under the action of the reset spring 38; and then, the second knob 39 is rotated reversely to rotate the threaded sleeve 42 reversely, so that the screw rod 34 is contracted in the threaded sleeve 42 through threaded connection, the contraction and reset of the positioning rod 36 are realized, and finally, the anastomat is taken down to finish suturing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an intestinal end is with disposable straight line anastomat, includes main part (1), its characterized in that: the inner wall of the main body (1) is fixedly connected with a first support plate (2) and a second support plate (3), the first support plate (2) is connected with a trigger plate (4) in a penetrating and sliding manner, the middle parts of the upper surface and the lower surface of the trigger plate (4) are respectively provided with a clamping strip (5) and a rack (6), one end of the upper surface of the trigger plate (4), which is far away from the first support plate (2), is fixedly connected with a T-shaped block (7), one side, close to the T-shaped block (7), of the top of the inner wall of the main body (1) is provided with a T-shaped groove (8), the T-shaped groove (8) is connected with the T-shaped block (7) in a sliding manner, one side, close to the T-shaped groove (8), of the upper surface of the main body (1) is provided with a connecting port (9), the upper surface of the main body (9) is fixedly connected with an automatic locking device (10), and the automatic locking device (10) is clamped with the clamping strip (5), the two sides of the inner wall of the main body (1) are rotatably connected with a firing shaft (11), the middle of the firing shaft (11) penetrates through and is fixedly connected with a gear (12), the gear (12) is meshed with the rack (6) on the lower surface of the firing plate (4), the part of the firing shaft (11) between the gear (12) and one side of the inner wall of the main body (1) is fixedly connected with a rotating wheel (13), the rotating wheel (13) is fixedly connected with a pressing rod (14), one side of the main body (1) is provided with a pressing groove (15), the pressing groove (15) penetrates through and is slidably connected with the pressing rod (14), one end of the firing plate (4) close to the first support plate (2) is fixedly connected with a push plate (16), the middle of one side of the push plate (16) far away from the firing plate (4) is fixedly connected with a firing rod (17), and the firing rod (17) penetrates through the second support plate (3), the upper surface of the main body (1) is fixedly connected with a positioning device (18), one side of the main body (1) is fixedly connected with a nail seat (19), and the upper part of one side, close to the main body (1), of the nail seat (19) is provided with a positioning hole (20); the automatic locking device (10) comprises a shell (21), locking shafts (22) are rotatably connected to two sides of the inner wall of the shell (21), a clamping wheel (23) is fixedly connected to the middle of each locking shaft (22), torsion springs (24) are fixedly connected to two sides of each clamping wheel (23), one ends, far away from the clamping wheels (23), of the torsion springs (24) are fixedly connected to the inner wall of the shell (21), a cam shaft (25) penetrates through one side of the inner wall of the shell (21) and is rotatably connected to one side of the inner wall of the shell, a knob (26) is fixedly connected to one end, far away from the shell (21), of the cam shaft (25), a cam (27) is fixedly connected to the middle of the position, located in the shell (21), of the clamping wheels (23) and clamping strips (5) are clamped; the positioning device (18) comprises a positioning box (28), two ends of the inner wall of the positioning box (28) are respectively fixedly connected with a first positioning plate (29) and a second positioning plate (30), the first positioning plate (29) is penetrated through and rotatably connected with a positioning shaft (31), one end of the positioning shaft (31) is fixedly connected with a worm wheel (32), the other end of the positioning shaft is fixedly connected with a threaded sleeve (42), the upper surface of the positioning box (28) is close to one side of the worm wheel (32) and is penetrated through and rotatably connected with a worm (33), one end of the positioning box (28) is far away from the worm (33) is fixedly connected with a second knob (39), the worm (33) is meshed with the worm wheel (32), the inner wall of the threaded sleeve (42) is in threaded connection with a screw rod (34), and the screw rod (34) is far away from one end of the threaded sleeve (42) is fixedly connected with a connecting plate (35), the connecting plate (35) is connected with the inner wall of the positioning box (28) in a sliding mode, a positioning rod (36) is fixedly connected to the middle of one side, away from the screw rod (34), of the connecting plate (35), and the positioning rod (36) penetrates through and is connected with the second positioning plate (30) and the positioning box (28) in a sliding mode;

the positioning rod (36) and the positioning hole (20) are coaxial, and the diameter of the end face of the positioning rod (36) is equal to that of the end face of the positioning hole (20); the connecting plate (35) drives the positioning rod (36) to move out of the positioning box (28) to be matched with the positioning hole (20) to complete positioning.

2. The disposable linear intestinal end stapler according to claim 1, wherein: the middle part of one side, close to the positioning rod (36), of the connecting plate (35) is fixedly connected with a safety spring (37), and one end, far away from the connecting plate (35), of the safety spring (37) is fixedly connected to one side of the second positioning plate (30).

3. The disposable linear intestinal end stapler according to claim 1, wherein: the middle part of one side, far away from the firing plate (4), of the push plate (16) is fixedly connected with a return spring (38), one end, far away from the push plate (16), of the return spring (38) is fixedly connected to the second support plate (3), and the return spring (38) and the firing rod (17) are coaxial.

4. The disposable linear intestinal end stapler according to claim 1, wherein: one end of the firing rod (17) close to the second support plate (3) penetrates through a nail bin (40), and the nail bin (40) is fixedly connected to the inner wall of the main body (1).

5. The disposable linear intestinal end stapler according to claim 4, wherein: the nail seat (19) is provided with a nail groove (41), and the nail groove (41) corresponds to the nail bin (40).