Stitching instrument for endoscope

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a stitching instrument for an endoscope. Comprising a fixed handle, a fixed bolt, a needle mounting button, a rotating assembly, a flushing assembly, a sleeve, a protective cap, a bending device, a movable handle, a suture steel wire, a pressing plate steel wire, a forceps head short pipe and a suture needle holding assembly. A movable handle mounting hole is formed in the upper end of the movable handle, the movable handle mounting hole and a movable handle mounting column of the fixed handle are correspondingly mounted, the near end of the sleeve penetrates through a sleeve hole in the far end of the fixed handle and is matched with a groove in the far end of the rotary connecting rod, and the far end of the sleeve is connected with the bending joint assembly; the near end of the forceps head short tube is connected with the bending joint assembly, and the far end of the forceps head short tube is connected with the suture needle holding assembly; the near end of the suture steel wire is in fastening connection with the near end of the movable handle through a steel wire lock catch, and the far end of the suture steel wire is connected with a rack seat in the suture needle holding assembly and used for driving the suture needle holding assembly to perform continuous suture; and the flushing connector is embedded into the upper rotary shifting wheel and is connected with the flushing hole at the near end of the sleeve.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, and in particular relates to an endoscopic stapler used for tissue suturing in surgical operations. Background Art

[0002] Laparoscopic surgery is a minimally invasive surgery that uses modern camera technology and laparoscopic surgical instruments to complete complex chest / abdominal operations through chest / abdominal wall cannulas or tiny incisions. Only 1 to 3 1.5 cm chest / abdominal wall holes are needed to complete laparoscopic surgery. During the operation, the doctor inserts the laparoscopic surgical instruments through the cannula through the puncture device, and uses surgical equipment such as vascular clamps to perform resection and anastomosis of the lesion.

[0003] During laparoscopic surgery, doctors often need to use needle holders to hold the suture needle with thread to supplement or strengthen the suture of the tissue to ensure the effectiveness of the surgery. However, the laparoscopic surgery site is narrow, and manual suturing is difficult, time-consuming and laborious, so suturing can be done with a suturer. However, existing suturers usually control the movement of the suture needle by pressing the handle to drive the gear rack to move back and forth. Because it is a rigid operation, the doctor's hands ache due to long-term pressing, and the amount of bleeding is large when the suture needle penetrates the tissue. Summary of the invention

[0004] The purpose of the present invention is to provide an endoscopic stapler to address the above-mentioned deficiencies, which is a laparoscopic surgical stapler that saves labor in operation and reduces the amount of bleeding in the human body.

[0005] The proximal end mentioned in the present invention refers to the end close to the surgical operator, and the distal end refers to the end far away from the surgical operator.

[0006] In order to achieve the above object, the technical solution of the present invention is: An endoscope suturing device comprises a fixed handle, a fixed bolt, a needle loading button, a rotating assembly, a flushing assembly, a sleeve, a protective cap, a bending device, a movable handle, a suturing wire, a pressure plate wire, a short tube of a clamp head, a bending joint assembly, and a suturing needle holding assembly.

[0007] The movable handle is provided with a movable handle mounting hole at the upper end thereof, which is mounted correspondingly to the movable handle mounting post of the fixed handle. The movable handle can move within a certain range with the movable handle mounting post as the axis. The proximal end of the sleeve passes through the sleeve hole at the distal end of the fixed handle, fits into the groove at the distal end of the rotating connecting rod, and the distal end is connected to the bending joint assembly. The proximal end of the short tube of the clamp head is connected to the bending joint assembly, and the distal end of the sleeve is connected to the suture needle holding assembly.

[0008] The proximal end of the suture wire passes through two suture wire pulleys fixed by pulley fixing pins and passes through the fixed handle, and is fastened to the proximal end of the movable handle by a wire lock. The distal end of the suture wire passes through the sleeve and passes between the two pulleys in the bending joint assembly, and is connected to the rack seat in the suture needle holding assembly to drive the suture needle holding assembly for continuous suturing.

[0009] The flushing connection port is embedded in the upper rotating dial and connected to the flushing hole at the proximal end of the cannula. The proximal end of the protective cap is sleeved on the suture needle holding assembly and the distal end is sealed.

[0010] The proximal end of the pressure plate wire passes through the pressure plate wire pulley fixed by the pulley fixing pin, and is fixed in the needle loading button and the wire clamp, and the distal end passes through the pressure plate wire tube, the rack seat, the pressure plate guide pin and the pressure plate spring, and is fixedly connected to the needle loading pressure plate. When the needle loading button is turned, the pressure plate wire is pulled toward the proximal end, and the needle loading pressure plate connected to the distal end thereof moves toward the proximal end, exposing the suture needle installation groove at the distal end of the upper clamp head, and compressing the pressure plate spring at the same time. After the suture needle is installed, the needle loading button is released, the pressure plate spring extends, and the needle loading pressure plate is pushed to reset, thereby fixing the suture needle.

[0011] The rotating assembly includes a rotating dial, a rotating connecting rod positioning bead, a rotating connecting rod, and four fixing pins. The rotating connecting rod has a plurality of protrusions at the distal end, which cooperate with a plurality of transverse grooves at the proximal end of the sleeve to thereby fix it. The proximal end has a circular transverse depression, which cooperates with the hemispherical protrusions at the front end of the positioning beads on both sides. The positioning beads are fixed in the reserved holes of the fixed handle. The rotating dial is divided into an upper rotating dial and a lower rotating dial, which are fixed to each other by four fixing pins. The reinforcing ribs of the vertical protrusions inside the rotating dial cooperate with the vertical grooves at the proximal end of the sleeve during installation, and are then fixed by four fixing pins. Rotating the rotating dial will drive the sleeve, and then drive the rotating connecting rod to rotate. The positioning beads will sequentially replace the slots that cooperate with the rotating connecting rod to achieve the fixation of the rotation angle.

[0012] The bending device is composed of a bending dial, a group of bending turntable positioning beads, a bending shaft, a bending connecting pin, a bending turntable, a turntable insert, a bending connecting rod, a joint connecting rod and a bending joint assembly. The bending dial is composed of an upper bending dial and a lower bending dial, which are fixed by the support column of the upper bending dial and the groove of the lower bending dial, and cooperate with the lower end of the bending shaft to drive the bending shaft to rotate. The bending turntable cooperates with the upper end of the bending shaft and rotates with the bending shaft. At the same time, there is an annular vertical groove on the outer circumference of the bending turntable, which cooperates with the bending turntable positioning beads on both sides. The bending turntable positioning beads are installed and fixed in the reserved holes of the fixed handle. The lower part of the bending connecting pin fits with the notch opened in the bending turntable, and the upper part cooperates with the proximal opening of the bending connecting rod. The turntable insert is installed in the notch of the bending turntable and fixed by welding. Its arc surface and the inner ring of the bending turntable form a closed ring, which jointly restricts the bending connecting pin so that it will not slide and fall off.

[0013] The bending dial wheel is fixed in the notch at the far end of the fixed handle by a bending shaft and a bending turntable, the lower end of the bending connecting pin fits in the notch of the bending turntable, and the bending connecting pin is fixed in the bending turntable through the turntable insert, and the upper end of the bending connecting pin is connected to the joint connecting rod, and the joint connecting rod is connected to the bending joint assembly through the bending connecting rod. By rotating the bending dial wheel, the bending shaft, the bending turntable, the bending connecting pin and the joint connecting rod are driven, so that the bending connecting rod drives the bending joint assembly to generate bending movement, thereby realizing the bending of the suture needle holding assembly.

[0014] The proximal end of the joint connecting rod is sleeved on the step structure at the distal end of the bending connecting rod. When the suturing device is installed, after the joint connecting rod and the bending connecting rod are connected, a limiting ring is squeezed out at a position on the joint connecting rod corresponding to the groove of the bending connecting rod, to ensure that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod passes through the reserved hole of the joint container and is installed in coordination with the pin on the left joint head.

[0015] The bending joint assembly is composed of a left joint head, a right joint head, a pulley, a right joint head pin, a left joint head pin and a joint container. Two pulleys are installed on the pulley pin of the right joint head, and then the left joint head and the right joint head are assembled and installed in the joint container, and the right joint head pin and the left joint head pin are matched and installed, and the proximal end of the joint container is welded and fixed to the distal end of the sleeve. The assembled joint head can rotate around the axial direction of the right joint head pin and the left joint head pin.

[0016] The flushing assembly includes a flushing connection port, a flushing port protective cover, a flushing liquid catheter, and an anti-backflow sealing plug. When the flushing liquid catheter is installed, the distal end enters from the flushing port of the cannula and extends toward the distal end of the cannula. A fixing ring is provided at the proximal port of the flushing liquid catheter, which fits the outer edge of the flushing port of the cannula and is pressed and fixed by the upper rotating dial. The anti-backflow sealing plug is made of soft silicone, and is provided with small holes for the flushing liquid catheter, the pressing plate wire tube, the suture wire, and the joint connecting rod to pass through at the corresponding position. It is installed at the distal end of the cannula and is tightly fixed to isolate the distal end and proximal end of the cannula. The flushing connection port is installed in the flushing hole at the distal end of the upper rotating dial and the flushing hole of the cannula, and the proximal end of the cannula is fixedly connected to the rotating connecting rod through a slot. The upper end of the flushing connection port is used to connect with an external flushing liquid tube, and the flushing connection port and the flushing liquid catheter form a water channel to clean the wound during surgery.

[0017] The protective cap is made of silicone or rubber, is closed at the far end, and has four reinforcing ribs inside to prevent it from falling off easily. It is put on the suture needle holding assembly for protection during transportation and storage, and can be removed when used in surgery.

[0018] When the suture device is installed, after the joint connecting rod and the bending connecting rod are connected, a limiting ring is squeezed out at a position on the joint connecting rod corresponding to the groove of the bending connecting rod, so as to ensure that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. This prevents the bending connecting rod and the joint connecting rod from interfering with the movement of the rotating assembly, thereby providing a larger rotation space.

[0019] The rotating dial is engaged with the rotating track at the far end of the fixed handle, and is fitted and fixed with the vertical slot formed by the rotating connecting rod and the sleeve, and can rotate around the axis of the sleeve, and the upper and lower parts are connected and fixed by a fixing pin. When the rotating dial rotates, the sleeve, the rotating connecting rod, and the bending joint assembly are driven to rotate axially through the vertical slot, thereby realizing the rotation of the suture needle holding assembly.

[0020] The suture needle holding assembly includes a needle loading assembly, a rack assembly, a gear assembly, a rack reset spring and a suture needle. The short tube of the clamp head is connected to the distal end of the bending joint assembly. The distal end of the suture wire is fixedly connected to the rack seat of the rack assembly. The rack assembly is elastically connected to the rack seat through a rack reset spring, and the gear in the gear assembly is meshed with the rack in the rack assembly. The suture wire, rack, and rack seat form the driving device of the entire suture needle holding assembly. When the suture wire pulls the rack seat to move, it drives the rack to move toward the proximal end, compressing the rack reset spring, and the gear rotates clockwise with the rack movement, thereby causing the gear gasket and the connecting plate positioning pin to rotate with the gear. Since the connecting plate is limited by the column in the middle of the lower clamp head, the push needle and the needle withdrawal spring tube are displaced in an arc along the arc groove at the far end of the lower clamp head; when the suture wire begins to relax, the rack reset spring stretches, pushing the rack seat and the rack to move toward the far end, and the gear rotates counterclockwise under the drive of the rack, and the gear gasket and the connecting plate positioning pin also rotate counterclockwise, causing the connecting plate to drive the push needle and the push needle spring tube to retreat. This reciprocating motion causes the suture needle to perform reciprocating circular motion, which is used for tissue suturing in surgical operations.

[0021] The proximal end of the rack assembly has a short tube of the clamp head for mounting a rack reset spring. The rack reset spring will not be compressed and cause deflection. At the same time, when the suture needle is operated to the extreme position, the rack seat will resist the bending joint, and the short tube of the clamp head and the suture needle holding assembly are fixedly connected to ensure that the suture needle can be reset normally.

[0022] The gear assembly includes a gear, a gear gasket, a connecting plate locating pin and a connecting plate. The gear cooperates with the gear gasket. The gear gasket has an eccentric limiting long hole. The connecting plate locating pin cooperates with the eccentric long hole on the gear gasket and the connecting hole at the proximal end of the connecting plate for positioning. The connecting plate has a limited long hole in the middle, which cooperates with the limiting column of the lower clamp head. The connecting plate is used to connect the gear and the suture needle, and the limiting long hole in the middle of the connecting plate can limit the connecting plate to ensure the maximum movement range of the connecting plate.

[0023] After adopting the above structure, the advantages of the present invention are as follows: The protective device of the present invention ensures the integrity and precision of the device when in use, and the protective cap fits tightly to isolate the suture needle holding assembly from the outside world, thereby ensuring safety and sanitary conditions and reducing the possibility of cross infection.

[0024] The flushing component of the present invention can clean the wound after being connected to an external water pipe, and the flushing liquid is sprayed out from the bending joint component in a trumpet shape, so that a large cleaning area is covered, blood stasis is reduced, and recovery is promoted.

[0025] The present invention adopts a structure in which a bending connecting rod and a joint connecting rod cooperate to form a limiting ring, thereby avoiding interference of the bending connecting rod and the joint connecting rod on the movement of the rotating component, and having a larger rotation space, and the operation is smoother during use.

[0026] The bending joint assembly of the present invention is approximately spherical, the bending process is smoother, the bending angle is larger, and there is no interference between each other.

[0027] The invention has a more accurate rotation angle. The rotating connecting rod in the rotating assembly and the bending and turning dial wheel in the bending and turning assembly are provided with limiting grooves, each of which cooperates with a set of positioning beads, and can accurately limit the rotation angle to adapt to more difficult surgical environments.

[0028] The bending and swivel joint assembly of the present invention makes the bending axis coincide with the rotation plane, thereby shortening the distance from the bending axis to the distal end of the suturing head, making the movement of the suturing head more flexible and making it easier to perform surgical operations for tissue suturing in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 is an external schematic diagram of an endoscopic stapler; Figure 2 The present invention is a schematic diagram of the structure of a protective cap of an endoscope stapler; Figure 3 It is a schematic diagram of an endoscope stapler opening the housing and removing the protective cap; Figure 4 The present invention is a schematic diagram of a rotating assembly and a flushing assembly of an endoscopic stapler; Figure 5 The present invention is a schematic diagram of the disassembly of a rotating assembly and a flushing assembly of an endoscopic stapler; Figure 6 The present invention is a schematic diagram of a bending and rotating assembly and a bending and rotating joint assembly of an endoscopic stapler; Figure 7 The present invention is a disassembled schematic diagram of a bending and rotating assembly and a bending and rotating joint assembly of an endoscope stapler; Figure 8 The present invention is a schematic diagram of the internal connection state of an endoscopic stapler; Fig. 9 The present invention is a schematic diagram of the disassembly of a suture needle holding assembly of an endoscopic suture device.

[0030] Fig.10 The present invention is a schematic diagram of the needle loading state of a suture needle holding assembly of an endoscopic suture device.

[0031] Fig.11 The present invention is a schematic diagram of the operation of a suture needle holding assembly of an endoscopic suture device.

[0032] In the figure: 1, fixed handle, 2, fixing bolt, 3, needle loading button, 4, rotating dial wheel, 5, flushing assembly, 6, sleeve, 7, protective cap, 8, bending dial wheel, 9, movable handle, 10, suture wire, 11, suture wire pulley, 12, pulley fixing pin, 13, wire lock buckle, 14, wire clamp, 15, pressure plate wire pulley, 16, pressure plate wire, 17, rotating connecting rod positioning bead, 18, rotating connecting rod, 19, bending joint assembly, 20, clamp head short tube, 21, suture needle holding needle assembly, 22, fixing pin, 23, bending shaft, 24, bending connecting pin, 25, bending turntable, 26, bending connecting rod, 27, joint connecting rod, 28, rack reset spring, 29, pressure plate wire tube, 30, bending turntable positioning bead, 31, turntable inlay; 1-1, movable handle mounting column, 4-1, upper rotating dial, 4-2, lower rotating dial, 5-1, flushing connection port, 5-2, flushing port protection cover, 5-3, flushing liquid conduit, 5-4, anti-backflow sealing plug, 7-1, protective cap reinforcement rib, 8-1, upper bending dial, 8-2, lower bending dial, 9-1, movable handle mounting hole, 19-1, left joint head, 19-2, right joint head, 19-3, pulley, 19-4, joint head right pin, 19-5, joint head left pin, 19-6, joint container, 21-1, rack seat, 21-2, rack, 21-3, pressure plate guide pin, 21-4, pressure plate spring, 21-5, needle pressure plate, 21-6, needle pressure plate positioning screw, 21-7, upper clamp head, 21-8, anti-retraction needle, 21-9, connecting piece, 21-10, push needle spring tube, 21-11, push needle, 21-12, push needle spring, 21-13, lower clamp head, 21-14, gear, 21-15, gear gasket, 21-16, connecting piece positioning pin, 21-17, suture needle mounting slot. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the examples given in the accompanying drawings.

[0034] The proximal end mentioned in the present invention refers to the end close to the surgical operator, and the distal end refers to the end far away from the surgical operator.

[0035] like Figure 1-3As shown, an endoscope suturing device includes a fixed handle 1, a fixed bolt 2, a needle loading button 3, a rotating assembly, a flushing assembly 5, a sleeve 6, a protective cap 7, a bending device, a movable handle 9, a suture wire 10, a pressure plate wire 16, a rotating connecting rod 18, a bending joint assembly 19, a pliers head short tube 20, and a suture needle holding assembly 21. The movable handle 9 is provided with a movable handle mounting hole 9-1 at the upper end, which is installed corresponding to the movable handle mounting column 1-1 of the fixed handle 1. The movable handle 9 can move within a certain range with the movable handle mounting column 1-1 as the axis. The proximal end of the sleeve 6 passes through the sleeve hole at the distal end of the fixed handle 1, fits with the groove at the distal end of the rotating connecting rod 18, and the distal end is connected to the bending joint assembly 19. The proximal end of the pliers head short tube 20 is connected to the bending joint assembly 10, and the distal end is connected to the suture needle holding assembly 21. The proximal end of the suture wire 10 passes through the fixed handle 1 by two suture wire pulleys 11 fixed by pulley fixing pins 12, and is fastened to the proximal end of the movable handle 9 by a wire lock buckle 13. The distal end passes through the sleeve 6 and passes between the two pulleys 19-3 in the bending joint assembly 19, and is connected to the rack seat 21-1 in the suture needle holding assembly to drive the suture needle holding assembly for continuous suture. The flushing connection port 5-1 is embedded in the upper rotating dial wheel 4-1 and is connected to the flushing hole at the proximal end of the sleeve 6. The proximal end of the protective cap 7 is sleeved on the suture needle holding assembly 21, and the distal end is sealed.

[0036] like Figure 4-5 As shown, the rotating assembly includes a rotating dial 4, a rotating connecting rod positioning bead 17, a rotating connecting rod 18, four fixing pins 22 and a sleeve 6.

[0037] The rotation function of an endoscope suture device is realized by a rotating connecting rod positioning bead 17, a rotating connecting rod 18, a rotating dial 4, four fixing pins 22 and a sleeve 6. The rotating connecting rod 18 has several protrusions at the distal end, which cooperate with several transverse grooves at the proximal end of the sleeve 6 to fix it. The proximal end has a circular ring-shaped transverse depression, which cooperates with the hemispherical protrusions at the front end of the rotating connecting rod positioning bead 17 on both sides. The rotating connecting rod positioning bead 17 is fixed in the reserved hole of the fixed handle 1. The rotating dial 4 is divided into an upper rotating dial 4-1 and a lower rotating dial 4-2, which are fixed to each other by four fixing pins 22. The reinforcing ribs of the vertical protrusions inside the rotating dial 4 cooperate with the vertical grooves at the proximal end of the sleeve 6 during installation, and are then fixed by four fixing pins 22. Rotating the rotating dial 4 will drive the sleeve 6, and then drive the rotating connecting rod 18 to rotate. The rotating connecting rod positioning bead 17 will sequentially replace the slots that cooperate with the rotating connecting rod 18 to achieve the fixation of the rotation angle.

[0038] The flushing assembly 5 includes a flushing connection port 5-1, a flushing port protective cover 5-2, a flushing liquid conduit 5-3, and an anti-backflow sealing plug 5-4. When the flushing liquid conduit 5-3 is installed, the distal end enters from the flushing port of the sleeve 6 and extends toward the distal end of the sleeve 6. The proximal port of the flushing liquid conduit 5-3 is provided with a fixing ring, which fits with the outer edge of the flushing port of the sleeve 6 and is pressed and fixed by the upper rotating dial 4-1. The anti-backflow sealing plug 5-4 is made of soft silicone, and is provided with small holes for the flushing liquid conduit 5-3, the pressure plate wire tube 29, the suture wire 10, and the joint connecting rod 27 to pass through at the corresponding position. It is installed at the distal end of the sleeve 6 and is tightly fixed to isolate the distal and proximal ends of the sleeve 6. The flushing connection port 5-1 is installed in the flushing hole at the distal end of the upper rotating dial 4-1 and the flushing hole of the sleeve 6, and the proximal end of the sleeve 6 and the rotating connecting rod are fixedly connected by a card slot. The upper end of the flushing connection port 5-1 is used to connect to an external flushing liquid tube. The flushing connection port 5-1 and the flushing liquid conduit 5-3 form a water channel. The connection of the bending joint assembly 19 serves as a flushing liquid outlet to clean the wound during surgery.

[0039] like Figure 6-7 As shown, the bending device is composed of a bending dial wheel 8, a group of bending turntable positioning beads 30, a bending shaft 23, a bending connecting pin 24, a bending turntable 25, a turntable insert 31, a bending connecting rod 26, a joint connecting rod 27 and a bending joint assembly 19. The bending dial wheel 8 is composed of an upper bending dial wheel 8-1 and a lower bending dial wheel 8-2, which are fixed by the column of the upper bending dial wheel 8-1 and the groove of the lower bending dial wheel 8-2, and cooperate with the lower end of the bending shaft 23 to drive the bending shaft 23 to rotate. The bending turntable 25 cooperates with the upper end of the bending shaft 23 and rotates with the bending shaft 23. At the same time, there is an annular vertical groove on the outer circumference of the bending turntable 25, which cooperates with the bending turntable positioning beads 17 on both sides. The bending turntable positioning beads 17 are installed and fixed in the reserved holes of the fixed handle 1. The lower part of the bending connecting pin 24 fits in the notch of the bending turntable 25, and the upper part fits in the proximal opening of the bending connecting rod 26. The turntable insert 31 is installed in the notch of the bending turntable 25 and fixed by welding. Its arc surface and the inner circle of the bending turntable 25 together form a closed ring, which jointly restricts the bending connecting pin 24 so that it will not slide off.

[0040] The proximal end of the joint connecting rod 27 is sleeved on the step structure of the distal end of the bending connecting rod 26. When the suturing device is installed, after the joint connecting rod 27 and the bending connecting rod 26 are connected, a limiting ring is squeezed out at a position on the joint connecting rod 27 corresponding to the groove of the bending connecting rod 26 to ensure that the joint connecting rod 27 is connected to the bending connecting rod 26 with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod 27 passes through the reserved hole of the joint container 19-6 and is installed in conjunction with the pin on the left joint head 19-1.

[0041] The bending joint assembly 19 is composed of a left joint head 19-1, a right joint head 19-2, a pulley 19-3, a joint head right pin 19-4, a joint head left pin 19-5 and a joint container 19-6. Two pulleys 19-3 are installed on the pulley pin of the right joint head 19-2, and then the left joint head 19-1 and the right joint head 19-2 are assembled and installed in the joint container 19-6, and the joint head right pin 19-4 and the joint head left pin 19-5 are matched and installed, and the proximal end of the joint container 19-6 is welded and fixed to the distal end of the sleeve 6. The assembled joint head can rotate around the axial direction of the joint head right pin 19-4 and the joint head left pin 19-5.

[0042] like Figure 8 As shown, the proximal end of the suture wire 10 passes through the fixed handle 1 by two suture wire pulleys 11 fixed by pulley fixing pins 12, and is fastened to the proximal end of the movable handle 9 by a wire lock buckle 13. The distal end passes through the sleeve 6 and passes between the two pulleys 19-3 in the bending joint assembly 19, and is connected to the rack seat 21-1 in the suture needle holding assembly 21, so as to drive the suture needle holding assembly for continuous suturing. By pressing the movable handle 9, the proximal end of the suture wire 10 is pulled upward, and the direction is changed through the two suture wire pulleys 11, pulling the rack seat 21-1 to move proximally, compressing the rack reset spring 28 in the short tube 20 of the clamp head, and at the same time driving the rack 21-2 to move proximally, driving the gear assembly and the suture needle to move; then releasing the movable handle 9, the compressed rack reset spring 28 is reset, pushing the rack seat 21-1 to move distally, and at the same time driving the rack 21-2 to move distally, thereby driving the gear assembly and the suture needle to reset, and so on and so forth, to achieve surgical tissue suturing operation.

[0043] like Figure 9-11 As shown, the proximal end of the pressure plate wire 16 passes through the pressure plate wire pulley 15 fixed by the pulley fixing pin 12, and is fixed to the wire clamp 14 in the needle loading button 3, and the distal end passes through the pressure plate wire tube 29, the rack seat 21-1, the pressure plate guide pin 21-3 and the pressure plate spring 21-4, and is fixedly connected to the needle loading pressure plate 21-5. When the needle loading button 3 is turned, the pressure plate wire 16 is pulled toward the proximal end, and the needle loading pressure plate 21-5 connected to its distal end moves toward the proximal end, exposing the suture needle installation groove 21-17 at the distal end of the upper clamp head 21-7, and compressing the pressure plate spring 21-4 at the same time. After the suture needle is installed, the needle loading button 3 is released, the pressure plate spring 21-4 is extended, and the needle loading pressure plate 21-5 is pushed to reset, thereby fixing the suture needle.

[0044] The suture needle holding assembly 21 is composed of a rack seat 21-1, a rack 21-2, a pressure plate guide pin 21-3, a pressure plate spring 21-4, a needle loading pressure plate 21-5, a needle loading pressure plate positioning screw 21-6, an upper clamp head 21-7, a stop needle 21-8, a connecting piece 21-9, a push needle spring tube 21-10, a push needle 21-11, a push needle spring 21-12, a lower clamp head 21-13, a gear 21-14, a gear gasket 12-15, and a connecting piece positioning pin 12-16. The gear seat 21-1 and the rack 21-2 are welded and fixed, and the gear 21-14 and the rack 21-2 are meshed and installed in the rack groove and the gear groove of the lower clamp head 21-13 respectively. The gear 21-14 rotates around the central axis of the gear gasket 21-15, and drives the proximal end of the connecting piece 21-9 through the connecting piece positioning pin 21-16. At the same time, the limiting long hole of the connecting piece 21-9 and the limiting column of the lower clamp head 21-13 form a slide rail. At the same time, the push pin spring tube 21-10 cooperates with the distal end of the connecting piece 21-9, and together with the slide rail, limits the movement of the connecting piece 21-9 along the U-shaped groove. A push pin spring 21-12 is installed below the push pin 21-11, and is installed inside the push pin spring tube 21-10 together. The upper clamp head 21-7 cooperates with the lower clamp head 21-13 to fix the internal rack, gear assembly and needle withdrawal assembly. The anti-retraction needle 21-8 is fixed with the upper clamp head 21-7, and the proximal end of the upper clamp head 21-7 is equipped with a pressure plate guide pin 21-3. The pressure plate spring 21-4 is installed at the proximal end of the needle mounting pressure plate 21-5 and is installed with the pressure plate guide pin 21-3. The needle mounting pressure plate positioning screw 21-6 cooperates with the threaded hole in the middle of the upper clamp head 21-7 to fix the needle mounting pressure plate 21-5 while limiting the movement position of the needle mounting pressure plate 21-5.

[0045] When installing the needle, it is used in conjunction with the suture box assembly, and the needle installation button 3 is pressed, and the pressure plate wire pulls 21-5 to move proximally along the track restricted by 21-6 to expose the annular suture needle groove, and the proximal end of the suture box assembly is installed in conjunction with the clamp head. After the suture needle is placed, the needle installation button 3 is released, and the needle installation pressure plate 21-5 is reset to fix the suture needle in the suture needle installation groove 21-17. After use, the needle installation button 3 is pressed again, and the needle installation pressure plate 21-5 moves proximally, and the push needle 21-11 will eject the suture needle due to the extension of the push needle spring 21-12, and the needle installation button 3 is released, and the needle installation pressure plate 21-5 is reset, which is convenient and quick.

Claims

1. An endoscope stapler, It is characterized in that It includes a fixed handle, a fixed bolt, a needle loading button, a rotating assembly, a flushing assembly, a sleeve, a protective cap, a bending device, a movable handle, a suture wire, a pressure plate wire, a short tube of the clamp head and a suture needle holding assembly; The upper end of the movable handle is provided with a movable handle mounting hole, which is installed corresponding to the movable handle mounting column of the fixed handle. The proximal end of the sleeve passes through the sleeve hole at the distal end of the fixed handle and fits into the groove at the distal end of the rotating connecting rod. The distal end of the sleeve is connected to the bending joint assembly; the proximal end of the short tube of the clamp head is connected to the bending joint assembly, and the distal end of the short tube of the clamp head is connected to the suture needle holding assembly; The proximal end of the suture wire passes through two suture wire pulleys fixed by pulley fixing pins and passes through the fixed handle, and is fastened to the proximal end of the movable handle by a wire lock buckle, and the distal end passes through the sleeve and passes between the two pulleys in the bending joint assembly, and is connected to the rack seat in the suture needle holding assembly, so as to drive the suture needle holding assembly to perform continuous sutures; The flushing connection port is embedded in the upper rotating dial and connected to the flushing hole at the proximal end of the cannula; The proximal end of the protective cap is sleeved on the suture needle holding assembly, and the distal end is sealed; The proximal end of the pressure plate steel wire passes around the pressure plate steel wire pulley fixed by the pulley fixing pin, and is fixed in the needle loading button and the wire clamp, and the distal end passes through the pressure plate steel wire tube, the rack seat, the pressure plate guide pin and the pressure plate spring, and the pressure plate steel wire is fixedly connected to the needle loading pressure plate.

2. An endoscopic stapler according to claim 1, It is characterized in that The rotating assembly includes a rotating dial, a rotating dial positioning bead, a rotating connecting rod and four fixing pins; the rotating connecting rod has a plurality of protrusions at the far end, which cooperate with a plurality of transverse grooves at the proximal end of the sleeve to fix the sleeve; the proximal end of the rotating connecting rod has a circular transverse depression, which cooperates with the hemispherical protrusions at the front end of the positioning beads on both sides; The rotating dial wheel positioning bead is fixed in the reserved hole of the fixed handle; The rotary dial is divided into two parts, an upper rotary dial and a lower rotary dial, which are fixed to each other by four fixing pins. The vertically protruding reinforcing ribs inside the rotary dial cooperate with the vertical grooves at the proximal end of the sleeve during installation, and are then fixed by four fixing pins. Rotating the rotary dial will drive the sleeve, and then drive the rotary connecting rod to rotate. The rotary dial positioning beads will sequentially replace the slots that cooperate with the rotary connecting rod to achieve the fixation of the rotation angle.

3. An endoscopic stapler according to claim 1, It is characterized in that The bending device is composed of a bending dial, a bending turntable positioning bead, a bending shaft, a bending connecting pin, a bending turntable, a turntable insert, a bending connecting rod, a joint connecting rod and a bending joint assembly; The bending and turning dial wheel is composed of an upper bending and turning dial wheel and a lower bending and turning dial wheel, and the two are fixed by the support column of the upper bending and turning dial wheel and the groove of the lower bending and turning dial wheel, and cooperate with the lower end of the bending and turning shaft to drive the bending and turning shaft to rotate; The bending turntable cooperates with the upper end of the bending shaft and rotates with the bending shaft. At the same time, there is an annular vertical groove on the outer circumference of the bending turntable, which cooperates with the bending turntable positioning beads on both sides. The bending turntable positioning beads are installed and fixed in the reserved holes of the fixed handle. The lower part of the bending connecting pin fits with the notch opened in the bending turntable, and the upper part cooperates with the proximal end opening of the bending connecting rod. The turntable insert is installed in the notch of the bending turntable; The bending dial wheel is fixed in the distal slot of the fixed handle by a bending shaft and a bending turntable. The lower end of the bending connecting pin fits in the slot of the bending turntable, and the upper end is connected to the joint connecting rod. The joint connecting rod is connected to the bending joint assembly through the bending connecting rod. By rotating the bending dial wheel, the bending shaft, the bending turntable, the bending connecting pin and the joint connecting rod are driven, so that the bending connecting rod drives the bending joint assembly to generate bending movement, thereby realizing the bending of the suture needle holding assembly.

4. An endoscopic stapler according to claim 3, It is characterized in that The proximal end of the joint connecting rod is sleeved on the step structure at the distal end of the bending connecting rod. When the suturing device is installed, after the joint connecting rod and the bending connecting rod are connected, a limiting ring is squeezed out at a position on the joint connecting rod corresponding to the groove of the bending connecting rod, to ensure that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod passes through the reserved hole of the joint container and is installed in coordination with the pin on the left joint head.

5. An endoscopic stapler according to claim 3, It is characterized in that The bending and turning joint assembly is composed of a left joint head, a right joint head, a pulley, a right pin of the joint head, a left pin of the joint head and a joint container; Two pulleys are installed on the pulley pin of the right joint head, and then the left joint head and the right joint head are combined and installed in the joint container, and are matched with the right pin of the joint head and the left pin of the joint head for installation, and the proximal end of the joint container is welded and fixed to the distal end of the sleeve. The assembled joint head can rotate around the axial direction of the right pin of the joint head and the left pin of the joint head.

6. The endoscopic stapler according to claim 1, It is characterized in that The flushing assembly comprises a flushing connection port, a flushing port protective cover, a flushing fluid conduit and an anti-backflow sealing plug; when the flushing fluid conduit is installed, the distal end enters from the flushing port of the sleeve and extends toward the distal end of the sleeve; a fixing ring is provided at the proximal end port of the flushing fluid conduit, which fits the outer edge of the flushing port of the sleeve and is pressed and fixed by the upper rotating dial wheel; the anti-backflow sealing plug is made of soft silicone, and small holes for the flushing fluid conduit, the pressure plate wire tube, the suture wire and the joint connecting rod to pass through are provided at corresponding positions; the flushing connection port is installed in the flushing hole at the distal end of the upper rotating dial wheel and the flushing hole of the sleeve; the proximal end of the sleeve and the rotating connecting rod are fixedly connected by a card slot; the upper end of the flushing connection port is used to connect with an external flushing fluid tube; the flushing connection port and the flushing fluid conduit form a waterway; the connection of the bending joint assembly serves as a flushing fluid outlet to clean the wound during surgery.

7. An endoscopic stapler according to claim 1, It is characterized in that The suture needle holding assembly comprises a needle loading assembly, a rack assembly, a gear assembly, a rack return spring and a suture needle; The short tube of the clamp head is connected to the distal end of the bending joint assembly, the distal end of the suture wire is fixedly connected to the rack seat of the rack assembly, the rack assembly is elastically connected to the rack seat through a rack reset spring, and the gear in the gear assembly is meshed with the rack in the rack assembly; the suture wire, the rack, and the rack seat constitute a driving device for the entire suture needle holding assembly, when the suture wire pulls the rack seat to move, it drives the rack to move toward the proximal end, compressing the rack reset spring, and the gear rotates clockwise with the rack movement, thereby causing the rack The wheel gasket and the connecting piece locating pin rotate with the gear. Since the connecting piece is limited by the column in the middle of the lower clamp head, the push pin and the push pin spring tube are displaced in an arc shape along the arc groove at the far end of the lower clamp head; when the suture wire begins to relax, the rack reset spring stretches, pushing the rack seat and the rack to move toward the far end, and the gear rotates counterclockwise under the drive of the rack. The gear gasket and the connecting piece locating pin also rotate counterclockwise, causing the connecting piece to drive the push pin and the push pin spring tube to retreat, and so on and so forth, causing the suture needle to perform reciprocating circular motion.

8. An endoscopic stapler according to claim 7, It is characterized in that The proximal end of the rack assembly has a short tube of the clamp head for mounting a rack reset spring. The rack reset spring will not be compressed and cause deflection. At the same time, when the suture needle is operated to the extreme position, the rack seat will resist the bending joint assembly, and the short tube of the clamp head and the suture needle holding assembly are fixedly connected to ensure the normal resetting of the suture needle.

9. The endoscopic stapler according to claim 7, It is characterized in that The gear assembly includes a gear, a gear gasket, a connecting plate positioning pin and a connecting plate; the gear cooperates with the gear gasket, the gear gasket has an eccentric limiting long hole, the connecting plate positioning pin cooperates with the eccentric long hole on the gear gasket and the connecting hole at the proximal end of the connecting plate for positioning, the connecting plate has a limited long hole in the middle, which cooperates with the limiting column of the lower clamp head, the connecting plate is used to connect the gear and the suture needle, and the limiting long hole in the middle of the connecting plate limits the connecting plate to ensure the maximum movement range of the connecting plate.

10. The endoscopic stapler according to claim 1, It is characterized in that The protective cap is made of silicone or rubber and has four reinforcing ribs inside.

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