Anastomat

Abstract

The invention discloses an anastomat, and relates to the field of medical instruments, the anastomat comprises a casing and a top cover, the casing is provided with a pad cover and a screw cover, a connecting cylinder is fixedly connected in the casing, a connecting pipe is connected in the connecting cylinder, the connecting pipe penetrates through the pad cover, a first driving shaft is connected in the connecting cylinder, the first driving shaft is fixedly connected with a screw rod, and the connecting pipe is fixedly connected with a first ball nut; the screw rod is in threaded connection with the first ball nut; a movable frame is arranged in the machine shell and comprises a first mounting seat, a second mounting seat and a connecting rod, a nail needle seat and a first tool apron are mounted on the first mounting seat, and a channel is formed in the cushion cover; a second ball nut is fixedly connected to the second mounting seat, a rotating drum is rotationally connected to the machine shell, a sleeve is connected into the rotating drum, a threaded drum is fixedly connected to the sleeve, and the threaded drum is in threaded connection with the second ball nut; a holding rod is installed on the rotary drum, and a first elastic mechanism is arranged in the machine shell. The top cover is provided with an inserting rod matched with the connecting cylinder in an inserting mode. According to the invention, the precise adjustment of the cutting amount is realized, and the synchronization of two-layer intestinal tissue suturing and single-layer intestinal tissue cutting is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stapler. Background Art

[0002] A disposable anorectal stapler is a medical device used in rectal or anal surgery. It quickly closes wounds or connects the intestines through mechanical stapling. It is primarily used in hemorrhoidectomy, intestinal anastomosis, and fistula repair. Its core advantages are reduced infection risk, ease of operation, shortened surgical time, and single-use design, which avoids cross-contamination.

[0003] In existing disposable staplers, the cutting distance of intestinal segment cutting is fixed, which cannot be adjusted specifically for patients, cannot achieve the single-layer cutting function of double-layer intestinal tissue, and cannot meet the surgical requirements of suturing two segments of intestine. Summary of the Invention

[0004] The purpose of the present invention is to provide a stapler, aiming to solve the technical problem of poor convenience in use of staplers in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: A stapler comprises a casing and a top cover, wherein a gasket is provided at one end of the casing and a rotary cover is rotatably connected to the other end, a connecting cylinder is coaxially fixed in the casing, a connecting tube is coaxially slidably connected in the connecting cylinder, the connecting tube passes through the gasket, a first driving shaft is rotatably connected in the connecting cylinder, the first driving shaft is coaxially fixed to the rotary cover, the first driving shaft is coaxially fixed to a screw, a first ball nut is coaxially fixed to the connecting tube, and the screw is threadedly connected to the first ball nut; a movable frame is provided in the casing, the movable frame comprises a first mounting seat, a second mounting seat and a connecting rod connected therebetween, the connecting rod is parallel to the connecting cylinder and is slidably connected to the casing; a The nail needle seat and the first knife seat are provided with nail needles arranged in a circular manner, the first knife seat is equipped with a first annular knife, the ejector pin is located outside the circle of the first annular knife, and the gasket is provided with a channel for the nail needle and the first annular knife to pass through; the second mounting seat is fixedly connected to the second ball nut, the casing is rotatably connected to the rotating cylinder, the rotating cylinder is axially slidably connected to the sleeve, the sleeve is coaxially fixed with a threaded cylinder, and the threaded cylinder is screwed to the second ball nut; the rotating cylinder is equipped with a grip rod for driving the sleeve to move axially, and the movement of the sleeve drives the movable frame to move synchronously, and the casing is provided with a first elastic mechanism for driving the movable frame to reset; the top cover is provided with an insertion rod, and the insertion rod is plug-in fitted with the connecting cylinder.

[0006] Furthermore, two grips are provided, and the two grips are symmetrically arranged on both sides of the casing. A gear is provided at the hinged end of the grip, and a rack is provided on the outside of the sleeve, and the gears are meshed with each other.

[0007] Furthermore, a first locking mechanism is provided between the casing and the rotary cover, a first scale is provided outside the casing, and a first marking needle for indicating the first scale is provided on the rotary cover; a second locking mechanism is provided between the casing and the rotating drum, a second scale is provided outside the casing, and a second marking needle for indicating the second scale is provided on the rotating drum.

[0008] Furthermore, the first elastic mechanism includes a first spring, a mounting hole coaxially arranged with the connecting rod is provided in the casing, the first spring is located in the connecting hole, an annular platform is provided in the connecting hole, the annular platform is fixed to the connecting shaft, a limiting ring is installed at the port of the mounting hole, and the first spring is elastically supported between the annular platform and the limiting ring.

[0009] Furthermore, a piston ring is coaxially fixedly connected to the second mounting seat, a piston cavity is provided in the casing, and the piston ring is sealingly and slidingly connected to the piston cavity.

[0010] Furthermore, the casing is slidably connected to a touch rod, one end of the touch rod is connected to a pad cover and the other end is docked with a pressure sensor. A digital display screen is provided outside the casing, and a battery assembly and a control assembly are provided inside the casing. The pressure sensor, digital display screen, battery assembly and control assembly are electrically connected.

[0011] Furthermore, a second knife seat is coaxially sleeved on the outside of the connecting tube, and a second annular knife is fixedly connected to the second knife seat. The diameter of the second annular knife is smaller than that of the first annular knife. An annular protrusion is provided on the inner side surface of the first mounting seat, and a second annular groove is provided on the outer side surface of the second knife seat. The annular protrusion extends into the second annular groove with a gap; a second elastic mechanism is provided on the connecting tube for driving the second knife seat to reset.

[0012] Furthermore, the top cover includes a cover body, which includes two semicircular covers, the side planes of the two semicircular covers can be abutted against each other, the insertion rod is a hollow structure, the top end of the insertion rod is provided with a connecting seat, a hollow shaft is rotatably connected to the connecting seat, the hollow shaft is arranged perpendicular to the insertion rod, a toothed wheel is coaxially fixed to the hollow shaft, a toothed belt is engaged with the toothed wheel, both ends of the toothed belt pass through the insertion rod and extend to the outside of the bottom end of the insertion rod; both ends of the hollow shaft are slidably sleeved with connecting columns, the outer end of the connecting column is provided with a connecting end, and the connecting end is hinged to the inner end surface of the semicircular cover, connecting The connecting end is connected to a third elastic mechanism that drives the semicircular cover to flip around the connecting end; a track sleeve is fixedly connected to the connecting seat, and the track sleeve is sleeved on the hollow shaft. The end face of the track sleeve is provided with a curved groove, and the hollow shaft is provided with a slide groove. The slide groove passes through the side wall of the hollow shaft and extends along the axial direction of the hollow shaft. A limiting column is slidably connected in the slide groove, and the limiting column is fixed to the connecting column; a fourth elastic mechanism is connected to the hollow shaft, and the fourth elastic mechanism drives the connecting column to move in a direction away from the hollow shaft, and drives the limiting column to press against the groove surface of the curved groove.

[0013] Furthermore, an axial track groove is provided in the insertion rod, and the toothed belt is located in the axial track groove.

[0014] Furthermore, a rubber plug is inserted into the bottom of the plug rod, and the toothed belt is clamped in the gap of the rubber plug.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: 1. The present invention realizes precise adjustment of the knife stroke during cutting, and realizes simultaneous suturing of two layers of intestinal tissue and cutting of a single layer of intestinal tissue, thus meeting the surgical requirements for suturing two sections of intestine.

[0016] 2. The present invention has high cutting accuracy and strong controllability, ensuring effective cutting of the lower intestinal tissue and reducing damage to the upper intestinal tissue.

[0017] 3. Another function of the present invention is that it can cut both the inner double-layer intestinal tissue and the outer single-layer intestinal tissue, which can meet the requirements of subsequent secondary manual suturing and avoid the workflow of intestinal suture removal, thus reducing the difficulty of surgery.

[0018] 4. Another function of the present invention is that the cover can be easily removed from the human body, thus preventing damage to human tissue during removal of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a stapler embodiment 1 of the present invention; Figure 2 for Figure 1 A cross-sectional view of the middle casing; Figure 3 for Figure 1 a cross-sectional view of the middle anvil; Figure 4 for Figure 1 a cross-sectional view of the middle screw cap; Figure 5 This is a schematic structural diagram of a second embodiment of a stapler according to the present invention; Figure 6 This is a schematic structural diagram of a third embodiment of a stapler according to the present invention; Figure 7 This is a structural schematic diagram of an anvil in a fourth embodiment of a stapler according to the present invention; Figure 8 for Figure 7 Stereoscopic view from a bird's-eye view; Figure 9 for Figure 8 Partial structural diagram; Figure 10 for Figure 8 A top view of Figure 11 for Figure 10 Cross-sectional view in the AA direction; Figure 12 for Figure 10 Cross-sectional view in the middle BB direction; Figure 13 for Figure 7 Schematic diagram of the structure after the middle semicircular cover swings; In the figure, the housing 1, the connecting cylinder 10, the connecting tube 100, the drive shaft 101, the screw 102, the first ball nut 103, the annular groove 104, the front head 11, the first mounting cavity 110, the connecting portion 12, the first limiting ring 120, the first spring 121, the gripping portion 13, the second mounting cavity 130, the rotating cylinder 131, the sleeve 132, the threaded cylinder 133, the gripping rod 134, the gear 135, the rack 136, the first scale 137, the second scale 138, the arc groove 14, the digital display 15, the gasket 2, the touch rod 20, the pressure sensor 21, the rotary cover 3, the compression spring 30, the ball stud 31, the tightening bolt 32, the first mounting seat 4, and the nail needle seat 40, nail needle 400, first knife seat 41, first annular knife 410, second knife seat 42, second annular knife 420, annular protrusion 421, second annular groove 422, second spring 423, second mounting seat 5, second ball nut 50, piston ring 51, connecting rod 6, nail support 7, insertion rod 70, card bead 700, connecting seat 701, toothed belt 702, track sleeve 703, curved groove 704, slide groove 705, axial track groove 706, rubber plug 707, first annular groove 71, semicircular cover 72, hollow shaft 73, toothed wheel 730, connecting column 74, connecting end 740, torsion spring 741, limiting column 742, third spring 743. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] The orientations mentioned in this specification are based on the orientation of the stapler of the present invention during normal operation, and do not limit the orientation during storage and transportation. They only represent relative positional relationships, not absolute positional relationships.

[0022] Example 1 like Figures 1 to 4 As shown together, the stapler includes a housing 1 and an anvil 7; the housing 1 is connected to a connecting tube 10, a gasket cover 2, a rotary cover 3, and a movable frame, and the anvil 7 is connected to an insertion rod 70.

[0023] The housing 1 is in the shape of a long cylinder, and the connecting tube 10 is coaxially fixed in the housing 1. The housing 1 includes a front head 11, a gripping portion 13 and a connecting portion 12 connected therebetween. A first mounting cavity 110 is provided in the front head 11, and a second mounting cavity 130 is provided in the gripping portion 13.

[0024] The pad cover 2 is fixed at the outer end of the front head portion 11 and shields the first installation cavity 110 ; the rotary cover 3 is rotatably connected to the outer end of the grip portion 13 .

[0025] The connecting tube 100 is coaxially slidably connected inside the connecting tube 10, and the outer end of the connecting tube 100 can be moved to the outside of the gasket cover 2; the driving shaft 101 is rotatably connected inside the connecting tube 10, one end of the driving shaft 101 is fixed to the rotary cover 3, and the other end is coaxially fixed to the screw 102, and the connecting tube 100 is coaxially fixed with a first ball nut 103, and the screw 102 is threadedly connected to the first ball nut 103. A first limiting groove is provided in the connecting tube 10, and the first limiting groove extends along the axial direction of the connecting tube 10. A first slider is provided outside the first ball nut 103, and the first slider is slidably connected in the first limiting groove to limit the rotation of the first ball nut 103.

[0026] As the rotary cover 3 rotates, the screw 102 rotates synchronously, and driven by the screw 102 and the first ball nut 103 , the connecting tube 100 moves axially.

[0027] The movable frame includes a first mounting seat 4, a second mounting seat 5 and a connecting rod 6 connected therebetween. The first mounting seat 4 is located in the first mounting cavity 110, the second mounting seat 5 is located in the second mounting cavity 130, and the connecting rod 6 is parallel to the connecting tube 10 and is slidably connected to the housing 1.

[0028] A nail needle seat 40 and a first knife seat 41 are provided in the first mounting cavity 110. Both the nail needle seat 40 and the first knife seat 41 are fixed on the first mounting seat 4. The nail needle seat 40 is provided with nail needles 400 arranged in a circle. A first annular knife 410 is installed on the first knife seat 41. The nail needles 400 are located outside the circle of the first annular knife 410. The gasket cover 2 is provided with a channel for the nail needles 400 and the first annular knife 410 to pass through.

[0029] A rotating cylinder 131 is rotatably connected to the gripping portion 13. The rotating cylinder 131 and the gripping portion 13 are coaxial and equidiametrically arranged. A sleeve 132 is sleeved inside the rotating cylinder 131. A second limiting groove is provided inside the rotating cylinder 131. The second limiting groove extends along the axial direction of the rotating cylinder 131. A second slider is provided outside the sleeve 132. The second slider is slidably connected in the second limiting groove to limit the rotation of the sleeve 132.

[0030] A second ball nut 50 is coaxially fixed to the second mounting base 5. A threaded barrel 133 is coaxially fixed to the sleeve 132, which is threadedly connected to the second ball nut 50. The rotation of the rotating barrel 131 drives the sleeve 132 to rotate synchronously. Under the drive of the threaded barrel 133 and the second ball nut 50, the movable frame moves, thereby adjusting the blade output of the first annular blade 410. A handle 134 is mounted on the rotating barrel 131 to drive the axial movement of the sleeve 132. The movement of the sleeve 132 drives the movable frame to move synchronously. A first elastic mechanism is provided within the housing 1 to drive the movable frame to reset.

[0031] In this embodiment, there are two grips 134, which are symmetrically arranged on both sides of the casing 1 to facilitate the staff to apply force; a gear 135 is provided at the hinged end of the grip 134, and a rack 136 is provided on the outside of the sleeve 132. The gear 135 is engaged with the gear 135, and the sleeve 132 is driven to move by the swing of the grip 134.

[0032] In this embodiment, the first elastic mechanism includes a first spring 121, a first sliding hole and a mounting hole coaxially connected to the first sliding hole are provided in the connecting part 12, the aperture of the mounting hole is larger than the aperture of the first sliding hole, the connecting rod 6 is coaxially slidably connected to the first sliding hole and extends to the mounting hole, the first spring 121 is located in the connecting hole, an annular platform is provided in the connecting hole, the annular platform is fixed to the connecting shaft, and a first limiting ring 120 is installed at the port of the mounting hole, and the first spring 121 is elastically supported between the annular platform and the first limiting ring 120.

[0033] The anvil 7 is coaxially fixed to the insertion rod 70, and the insertion rod 70 is used in conjunction with the connecting tube 10. In this embodiment, the insertion rod 70 is provided with a card bead 700 on the outside, and the connecting tube 10 is provided with an annular card groove 104 that is engaged with the card bead 700.

[0034] Preferably, a first locking mechanism is provided between the casing 1 and the rotary cover 3, a first scale 137 is provided on the outside of the casing 1, and a first marking needle for indicating the first scale 137 is provided on the rotary cover 3. Due to the existence of the first scale 137, the telescopic length of the connecting tube 100 can be accurately adjusted by rotating the rotary cover 3. After the adjustment is completed, the rotary cover 3 is locked by the first locking mechanism; a second locking mechanism is provided between the casing 1 and the rotating drum 131, a second scale 138 is provided on the outside of the casing 1, and a second marking needle for indicating the second scale 138 is provided on the rotating drum 131. Due to the existence of the second scale 138, the moving distance of the movable frame can be accurately adjusted by rotating the rotating drum 131, and the second locking mechanism realizes the locking of the rotating drum 131 after rotation adjustment.

[0035] In this embodiment, the first locking mechanism includes a compression spring 30, a tightening bolt 32 and a ball head column 31. A second sliding hole is provided in the rotary cover 3. The compression spring 30, the tightening bolt 32 and the ball head column 31 are all located in the second sliding hole. The ball head column 31 is slidably connected to the second sliding hole, and the tightening bolt 32 is screwed into the sliding hole. The compression spring 30 is elastically supported between the ball head column 31 and the tightening bolt 32. A second limiting ring is provided at the end of the sliding hole. The second limiting ring is only for the ball head of the ball head column 31 to pass through. A number of circumferentially arranged arc grooves 14 are provided on the frame. Driven by the compression spring 30, the ball head passes through the second limiting ring and is stuck in the arc groove 14 to achieve locking of the rotary cover 3. The second locking mechanism has the same structure as the first locking mechanism, and only the setting position is different, which will not be repeated here.

[0036] After the diseased intestinal segment is resected, the anastomosis device is used to perform port connection surgery on the intestinal tissues at both ends. When in use, first, the main intestinal end is tied to the insertion rod 70 with a suture, and the anorectal end is tied to the connecting tube 100 with a suture, and then the insertion rod 70 is inserted into the connecting tube 100, and then the screw cover 3 is rotated to clamp the intestinal components at both ends between the nail support 7 and the pad cover 2, and then according to the pre-measured intestinal tissue thickness, the adjustment drum 131 is rotated to adjust the corresponding knife length and nail seam depth; after the adjustment is completed, the gripping rod 134 is held and pressed, and the sleeve 132 is moved under the transmission of the gear 135 and the rack 136, and then the synchronous movement of the moving frame is driven to realize the nailing of the nail needle 400 and the cutting function of the first annular knife 410. The nail needle 400 sutures two layers of intestinal tissue, and the first annular knife 410 only cuts one layer of intestinal tissue; After the previous step is completed, the cover 3 is rotated in the opposite direction to separate the anvil 7 from the pad cover 2, the sutures of the anvil 7 are removed, and then the anastomosis device and the cut intestinal tissue are taken out, and then the uncut intestinal end and the cut intestinal end are manually sutured for a second time.

[0037] The entire process achieves precise adjustment of the cutting distance of the first annular knife 410, realizes the simultaneous suturing of two layers of intestinal tissue and cutting of a single layer of intestinal tissue, and meets the surgical requirements of suturing two sections of intestine.

[0038] Furthermore, a piston ring 51 is coaxially fixed to the second mounting seat 5. The second mounting cavity 130 is divided by the piston ring 51 to form a piston cavity, and the piston ring 51 is sealingly and slidably connected to the piston cavity. As the movable frame moves, the first spring 121 is compressed, and the air in the piston cavity is compressed synchronously, achieving a two-stage buffer. The cutting action slows down as it progresses, ensuring cutting stability and reducing damage to the upper intestinal tissue caused by rapid cutting.

[0039] In this embodiment, the anvil 7 is an umbrella-shaped cover that facilitates insertion into the intestinal port. The flat end of the cover is coaxially fixed to the insertion rod 70. A first annular groove 71 is defined on the flat end of the cover. The first annular groove 71 is disposed around the insertion rod 70 and can accommodate a portion of intestinal tissue, thereby extending the length of the remaining intestinal tissue and facilitating subsequent secondary manual suturing.

[0040] Example 2 The difference between this embodiment and the first embodiment is that Figure 5 As shown, a third sliding hole is provided at the port of the front head portion 11, a pressure sensor 21 is fixed to the bottom of the third sliding hole, a touch rod 20 is slidably connected in the third sliding hole, one end of the touch rod 20 is fixed to the pad cover 2, and the other end is fixed to the sensing end of the pressure sensor 21; a digital display screen 15 is provided outside the gripping portion 13, a battery assembly and a control assembly are provided inside the casing 1, and the pressure sensor 21, the digital display screen 15, the battery assembly and the control assembly are electrically connected.

[0041] When the two end intestine components are clamped between the anvil 7 and the pad cover 2, the clamping pressure can be monitored in real time. By collecting the clamping pressure and clamping thickness, the cutting depth can be calculated using an empirical formula. Specifically, h = k1*(h1+f* / k) / 4, where h = cutting depth; h1 = clamping thickness; f = clamping pressure; k = elastic deformation coefficient of intestinal tissue; and k1 = correction factor. Using a pre-set data comparison table, the corresponding cutting depth is determined by comparing the clamping pressure and clamping thickness values ​​during surgery, enabling precise adjustment of the cutting depth.

[0042] In this method, the step of pre-measuring the thickness of the intestinal tissue is omitted, thus avoiding the problem of large error influence in this step, further improving the cutting accuracy, ensuring effective cutting of the lower intestinal tissue, and reducing damage to the upper intestinal tissue.

[0043] Example 3 The difference between this embodiment and the first embodiment is that Figure 6 As shown, a second knife seat 42 is coaxially sleeved on the outside of the connecting tube 10, and a second annular knife 420 is fixedly connected to the second knife seat 42. The diameter of the second annular knife 420 is smaller than that of the first annular knife 410. An annular protrusion 421 is provided on the inner side of the first mounting seat 4, and a second annular groove 422 is provided on the outer side of the second knife seat 42. The annular protrusion 421 extends into the second annular groove 422 with a gap; a second elastic mechanism for driving the second knife seat 42 to reset is provided on the connecting tube 10, and the second elastic mechanism includes a second spring 423. The second spring 423 is sleeved on the connecting tube 100, and the top end of the second spring 423 is supported on the boss of the connecting tube 100, and the bottom end of the second spring 423 is supported on the inner protrusion of the second annular knife 420.

[0044] When adjusting the cutting depth, since it is a fine adjustment, the first mounting seat 4 moves within a certain range, and the annular protrusion 421 does not touch the second knife seat 42; During seam cutting, the first mounting seat 4 moves up, and the annular protrusion 421 moves up and presses against the groove wall of the second annular groove 422, thereby driving the second knife seat 42 to move up synchronously, realizing synchronous cutting of the second annular knife 420; the needle stop seat is provided with a knife gap for the second annular knife 420 to enter.

[0045] By cutting synchronously with the first annular knife 410 and the second annular knife 420, both the inner double-layer intestinal tissue and the outer single-layer intestinal tissue can be cut, which can meet the requirements of subsequent secondary manual suturing and avoid the workflow of removing intestinal sutures, reducing the difficulty of the operation.

[0046] Example 4 The difference between this embodiment and the first embodiment is that Figures 7 to 13As shown in common, the nail seat 7 includes a cover body, which includes two semicircular covers 72. The side planes of the two semicircular covers 72 can be abutted against each other. The insertion rod 70 is a hollow structure. A connecting seat 701 is provided at the top of the insertion rod 70. A hollow shaft 73 is rotatably connected to the connecting seat 701. The hollow shaft 73 is perpendicular to the insertion rod 70. A toothed wheel 730 is coaxially fixed to the hollow shaft 73. The toothed wheel 730 is located in the middle of the hollow shaft 73. A toothed belt 702 is engaged with the toothed wheel 730. Both ends of the toothed belt 702 pass through the insertion rod 70 and extend to the outside of the bottom end of the insertion rod 70.

[0047] Both ends of the hollow shaft 73 are slidably connected with a connecting column 74, and the outer end of the connecting column 74 is provided with a connecting end 740, which is rotatably connected to the inner end surface of the semicircular cover 72 through a rotating shaft. The connecting end 740 is connected to a third elastic mechanism, which is a torsion spring 741. The torsion spring 741 is coaxially connected to the connecting shaft, and the two ends of the torsion spring 741 are respectively supported on the semicircular cover 72 and the connecting shaft, and the semicircular cover 72 is driven to swing upward around the connecting end 740 by the torsion spring 741.

[0048] A track sleeve 703 is fixedly connected to the connecting seat 701. The track sleeve 703 is sleeved on the hollow shaft 73. The end surface of the track sleeve 703 is provided with a curved groove 704. The hollow shaft 73 is provided with a slide groove 705. The slide groove 705 passes through the side wall of the hollow shaft 73 and extends along the axial direction of the hollow shaft 73. A limit post 742 is slidably connected in the slide groove 705. The limit post 742 is fixed to the connecting post 74. A fourth elastic mechanism is connected to the hollow shaft 73, and the fourth spring mechanism is a third spring 743. The third spring 743 is sleeved on the hollow shaft 73 and elastically supported between the connecting end 740 and the end face of the hollow shaft 73. The third spring 743 drives the connecting column 74 to move away from the hollow shaft 73, so that the limiting column 742 is pressed against the groove surface of the curved groove 704.

[0049] When the needle holder is taken out from the human body, the toothed belt 702 at one end is pulled to drive the toothed wheel 730 and the hollow shaft 73 to rotate synchronously. The rotation of the hollow shaft 73 will drive the position of the limit column 742 to shift. Under the elastic action of the third spring 743, the limit column 742 moves along the groove surface of the curved groove, and the two limit columns 742 move back to back. As the two semicircular covers 72 are relatively separated, the two semicircular covers 72 lose relative support after separation. Under the elastic action of the torsion spring 741, they flip over, thereby realizing the overall rotation of the cover body. The two semicircular covers 72 flip over to realize the foldable storage of the cover body, thereby reducing the size of the cover body, so that the cover body can be easily taken out of the human body, and avoiding damage to human tissue when the cover body is taken out.

[0050] Furthermore, an axial track groove 706 is provided in the insertion rod 70 , and the toothed belt 702 is located in the axial track groove 706 , thereby ensuring smooth and stable engagement between the toothed belt 702 and the toothed wheel 730 .

[0051] Furthermore, a rubber plug 707 is inserted into the bottom of the insertion rod 70 , and the toothed belt 702 is clamped in the gap of the rubber plug 707 , thereby fixing the toothed belt 702 and not hindering the user from pulling the toothed belt 702 .

[0052] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by ordinary technicians in this field based on the above-mentioned concept without creative work are all within the scope of protection of the present invention.

Claims

1. A stapler, comprising a housing and a top cover, characterized in that: One end of the housing is provided with a gasket cover, and the other end is rotatably connected to a rotary cover. A connecting cylinder is coaxially fixed in the housing, a connecting pipe is coaxially slidably connected in the connecting cylinder, the connecting pipe passes through the gasket cover, a first drive shaft is rotatably connected in the connecting cylinder, the first drive shaft is coaxially fixed to the rotary cover, the first drive shaft is coaxially fixed to a screw, a first ball nut is coaxially fixed to the connecting pipe, and the screw is threadedly connected to the first ball nut; A movable frame is provided in the housing, and the movable frame includes a first mounting seat, a second mounting seat, and a connecting rod connected therebetween. The connecting rod is parallel to the connecting cylinder and is slidably connected to the housing. The first mounting seat is provided with a nail needle seat and a first knife seat, the nail needle seat is provided with nail needles arranged in a circumferential manner, the first knife seat is provided with a first annular knife, the ejector pin is located outside the circle of the first annular knife, and the gasket cover is provided with a channel for the nail needles and the first annular knife to pass through; A second ball nut is fixedly connected to the second mounting seat, a rotating cylinder is rotatably connected to the housing, a sleeve is axially slidably connected to the rotating cylinder, a threaded cylinder is coaxially fixed to the sleeve, and the threaded cylinder is threadedly connected to the second ball nut; The rotating drum is provided with a gripping rod for driving the sleeve to move axially. The movement of the sleeve drives the movable frame to move synchronously. The housing is provided with a first elastic mechanism for driving the movable frame to reset. The top cover is provided with an insert rod, and the insert rod is plug-fitted with the connecting tube.

2. The stapler according to claim 1, wherein: There are two grips, which are symmetrically arranged on both sides of the housing. A gear is provided at the hinged end of the grip, and a rack is provided on the outer side of the sleeve, and the gear is meshed with the gear.

3. The stapler according to claim 1, wherein: A first locking mechanism is provided between the casing and the rotary cover, a first scale is provided on the outside of the casing, and a first marking needle for indicating the first scale is provided on the rotary cover; a second locking mechanism is provided between the casing and the rotating drum, a second scale is provided on the outside of the casing, and a second marking needle for indicating the second scale is provided on the rotating drum.

4. The stapler according to claim 1, wherein: The first elastic mechanism includes a first spring. A mounting hole coaxially arranged with the connecting rod is provided in the housing. The first spring is located in the connecting hole. An annular platform is provided in the connecting hole. The annular platform is fixed to the connecting shaft. A limiting ring is installed at the port of the mounting hole. The first spring is elastically supported between the annular platform and the limiting ring.

5. The stapler according to claim 4, characterized in that: A piston ring is coaxially fixedly connected to the second mounting seat, a piston cavity is provided in the housing, and the piston ring is sealingly and slidingly connected to the piston cavity.

6. The stapler according to claim 1, characterized in that: The housing is slidably connected to a touch rod, one end of the touch rod is connected to a pad cover, and the other end is connected to a pressure sensor. A digital display screen is provided outside the housing, and a battery assembly and a control assembly are provided inside the housing. The pressure sensor, digital display screen, battery assembly and control assembly are electrically connected.

7. The stapler according to claim 1, characterized in that: A second knife seat is coaxially sleeved on the outside of the connecting cylinder, and a second annular knife is fixedly connected to the second knife seat. The diameter of the second annular knife is smaller than that of the first annular knife. An annular protrusion is provided on the inner side surface of the first mounting seat, and a second annular groove is provided on the outer side surface of the second knife seat. The annular protrusion extends into the second annular groove with a gap; a second elastic mechanism is provided on the connecting cylinder to drive the second knife seat to reset.

8. The stapler according to claim 1, characterized in that: The top cover includes a cover body, which includes two semicircular covers, the side planes of the two semicircular covers can be abutted against each other, the insertion rod is a hollow structure, the top end of the insertion rod is provided with a connecting seat, a hollow shaft is rotatably connected to the connecting seat, the hollow shaft is arranged perpendicular to the insertion rod, a toothed wheel is coaxially fixed to the hollow shaft, a toothed belt is engaged with the toothed wheel, and both ends of the toothed belt pass through the insertion rod and extend to the outside of the bottom end of the insertion rod; Both ends of the hollow shaft are slidably sleeved with connecting columns, the outer ends of the connecting columns are provided with connecting ends, the connecting ends are hinged to the inner end surface of the semicircular cover, and the connecting ends are connected to a third elastic mechanism that drives the semicircular cover to flip around the connecting ends; A track sleeve is fixedly connected to the connecting seat, and the track sleeve is sleeved on the hollow shaft. The end surface of the track sleeve is provided with a curved groove, and the hollow shaft is provided with a slide groove, which passes through the side wall of the hollow shaft and extends along the axial direction of the hollow shaft. A limit column is slidably connected in the slide groove, and the limit column is fixed to the connecting column; The hollow shaft is connected to a fourth elastic mechanism, which drives the connecting column to move in a direction away from the hollow shaft and drives the limiting column to press against the groove surface of the curved groove.

9. The stapler according to claim 8, characterized in that: An axial track groove is provided in the insert rod, and the toothed belt is located in the axial track groove.

10. The stapler according to claim 8, characterized in that: A rubber plug is inserted into the bottom of the insertion rod, and the toothed belt is clamped in the gap of the rubber plug.

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