Disposable endoscope suturing device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a disposable endoscope suturing device which is used for tissue suturing in a surgical operation. Comprising a fixed handle, a locking screw, a needle mounting button, a rotating assembly, a sleeve, a forceps head assembly protective cap, a bending shifting wheel, a movable handle, a suture steel wire, a pressing plate steel wire, a rotating connecting rod, a bending joint assembly, a forceps head short pipe and a suture needle forceps head 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 at the corresponding position of the fixed handle are mounted in a matched mode, the movable handle mounting hole can rotate in the axial direction of the movable handle mounting column, the movable handle is provided with a suture steel wire mounting hole, and the near end of the sleeve penetrates through a sleeve hole in the far end of the fixed handle. The far end of the sleeve pipe 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 forceps head assembly.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a disposable endoscopic suturing device for tissue suturing in surgical procedures. Background Technology

[0002] Endoscopic surgery is a minimally invasive surgical procedure that uses modern imaging technology and endoscopic surgical instruments to perform complex thoracic / abdominal surgeries through a trocar or tiny incision in the chest / abdominal wall. Endoscopic surgery requires only 1-3 small incisions of 1.5cm in the chest / abdominal wall. During the procedure, the surgeon inserts endoscopic surgical instruments through a trocar into the trocar, and, in conjunction with surgical equipment such as vascular forceps, performs resection and anastomosis of the lesion.

[0003] During endoscopic surgery, surgeons often need to use needle holders to hold sutures with sutures to supplement or reinforce the tissue, ensuring the surgical outcome. However, the confined space in endoscopic surgery makes manual suturing difficult, time-consuming, and labor-intensive. Disposable endoscopic suturing devices are often used for this purpose. However, existing disposable endoscopic suturing devices typically control the movement of the suture needle by pressing a handle to drive a gear rack. This rigid operation causes hand pain for surgeons due to prolonged pressure, and results in significant bleeding when the suture needle penetrates the tissue. Utility Model Content

[0004] The purpose of this invention is to provide a disposable endoscopic suturing device, which is a disposable endoscopic suturing device that is easy to operate and reduces the amount of bleeding in the human body, and is used for tissue suturing in surgical procedures.

[0005] The proximal end of this invention refers to the end that is closer to the surgeon, and the distal end refers to the end that is farther away from the surgeon.

[0006] To achieve the above objectives, the technical solution of this utility model is: a disposable endoscopic suturing device, including a fixed handle, a locking screw, a needle loading button, a rotating assembly, a sleeve, a clamp head assembly protective cap, a bending assembly, a movable handle, a suturing wire, a pressure plate wire, a rotating connecting rod, a bending joint assembly, a clamp head short tube, and a suturing needle clamp head assembly.

[0007] The lower end of the movable handle is provided with an elliptical grip firing port, and the upper end of the movable handle is provided with a movable handle mounting hole, which is installed corresponding to the movable handle mounting post of the fixed handle. The movable handle can move within a certain range around the movable handle mounting post as an axis. The proximal end of the movable handle is provided with a stitching wire mounting hole, and the proximal end of the sleeve passes through the sleeve hole at the distal end of the fixed handle and mates with the groove at the distal end of the rotating connecting rod. The distal end of the sleeve is connected to the bending joint assembly.

[0008] 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 clamp head assembly. The proximal end of the suture wire passes around two suture wire pulleys fixed by pulley fixing pins, passes through the fixed handle, passes through the suture wire mounting hole at the proximal end of the wire lock and the movable handle, folds back, passes through the wire lock again, and is locked and connected by the 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 connects to the rack seat in the suture needle clamp head assembly to drive the suture needle clamp head assembly for continuous suturing.

[0009] Preferably, the protective cap of the forceps assembly is made of silicone or rubber, with a closed distal end and four reinforcing ribs inside to prevent it from falling off. It serves to protect the suture needle forceps assembly during transportation and storage, and can be removed when used in surgery.

[0010] Preferably, the movable handle is designed to be closed, enabling both near-hand gripping and far-hand pushing. Combined with ergonomics, the streamlined design at the turning point makes the operator's grip more secure, more convenient and comfortable to use, and reduces operator fatigue.

[0011] Preferably, the bending wheel is fixed in the slot at the distal end of the fixed handle by a bending shaft and a bending disc. The lower end of the bending connecting pin fits into the slot of the bending disc, and the upper end is connected to the joint connecting rod. The disc insert is installed in the slot of the bending disc and welded in place, with its arc surface facing the bending connecting pin to restrict the bending connecting pin and prevent it from slipping off. The bending connecting rod is connected to the bending joint assembly via the joint connecting rod. By rotating the bending wheel, the bending shaft, bending disc, bending connecting pin, and bending connecting rod are driven, causing the joint connecting rod to drive the bending joint assembly to bend, thereby realizing the bending of the suture needle forceps head assembly.

[0012] Preferably, during the assembly of the suture device, after the joint connecting rod and the bending connecting rod are connected, a limiting ring is extruded on the joint connecting rod at a position corresponding to the groove of the bending connecting rod. This ensures that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. This avoids the bending connecting rod and the joint connecting rod interfering with the movement of the rotating component, thus allowing for greater rotational space.

[0013] Preferably, the rotating dial is divided into an upper rotating dial and a lower rotating dial, which are connected and fixed by a rotating dial mounting post. Both parts have retaining rings at their proximal ends that engage with the rotating track at the distal end of the fixed handle. The distal end of the rotating rod has a rotating rod anti-reverse groove that cooperates with the anti-reverse clip at the proximal end of the sleeve to ensure radial fixed connection. The distal end of the rotating rod has several mating bosses that cooperate with several mating grooves at the proximal end of the sleeve to ensure axial fixed connection. The inner side of the rotating dial has two mating reinforcing ribs that cooperate with the mating groove formed by the proximal end of the sleeve and the distal end of the rotating rod, and can rotate around the sleeve axis. When the rotating dial rotates, it drives the sleeve, rotating rod, and bending joint assembly to rotate axially through the mating groove, thereby realizing the rotation of the suture needle forceps head assembly.

[0014] Preferably, the suture needle clamp head assembly includes a needle loading assembly, a rack assembly, a gear assembly, and a rack return spring. The clamp head short tube 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 the rack return spring. The gear in the gear assembly meshes with the rack in the rack assembly. The suture wire, rack, and rack seat constitute the drive mechanism of the entire suture needle clamp head assembly. When the suture wire pulls the rack seat, it moves the rack proximally, compressing the rack return spring. The gear rotates clockwise with the rack, causing the gear washer and connecting plate positioning pin to rotate with the gear. Because the connecting plate is limited by the connecting plate limiting pin in the middle of the lower clamp head, the pusher needle and pusher needle spring tube move along the annular pusher needle groove at the distal end of the lower clamp head. When the suture wire begins to relax, the rack return spring extends, pushing the rack seat and rack distally. The gear rotates counterclockwise under the rack's drive, and the gear washer and connecting plate positioning pin also rotate counterclockwise, causing the connecting plate to drive the pusher needle and pusher needle spring tube back. This cycle repeats, causing the suture needle to perform a reciprocating circular motion, completing the suturing operation.

[0015] Preferably, the proximal end of the rack assembly has a short clamp tube for mounting the rack return spring. The rack return spring will not be deflected due to compression. At the same time, when the suture needle is operated to the limit position, the rack seat will abut against the bending joint assembly, and the short clamp tube and the suture needle clamp assembly are fixedly connected to ensure that the suture needle can be returned to its normal position.

[0016] Preferably, the gear assembly includes a gear, a gear washer, a connecting plate locating pin, and a connecting plate. The gear mates with a gear mounting shaft along the axial direction of the gear washer. The gear washer is provided with an eccentric groove. The connecting plate locating pin mates with the eccentric groove on the gear washer and the pre-drilled hole of the connecting plate locating pin near the end of the connecting plate for positioning. The connecting plate has a connecting plate sliding limiting groove in the middle, which mates with the connecting plate limiting pin of the lower clamp head. A push pin mounting hole is provided at the distal end for installing a push pin spring tube.

[0017] The advantages of this utility model after adopting the above structure are as follows;

[0018] The protective device of this invention ensures the integrity and precision of the instrument during use. At the same time, the protective cap of the clamp head assembly fits tightly, isolating the clamp head assembly from the outside world, ensuring safety and hygiene, and reducing the possibility of cross-infection.

[0019] The movable handle of this utility model is designed to be closed, which can perform two operations: near-end gripping and far-end pushing away. Combined with ergonomics, the streamlined design at the turning point makes the operator's grip more secure, more convenient and comfortable to use, and reduces operator fatigue.

[0020] This invention employs a structure in which a bending connecting rod and a joint connecting rod work together to form a limiting ring, which avoids interference between the bending connecting rod and the joint connecting rod on the movement of the rotating component, and provides a larger rotation space, resulting in smoother operation during use.

[0021] The bending joint assembly of this invention is approximately spherical, resulting in a smoother bending process, a larger bending angle, and no interference between them.

[0022] This invention provides more precise rotation angles. The rotating rod in the rotating assembly and the bending wheel in the bending assembly have limit grooves, each cooperating with a set of positioning beads, which can precisely limit the rotation angle and adapt to more difficult surgical environments.

[0023] The bending joint assembly of this invention makes the bending axis and the rotation plane coincide, thereby shortening the distance from the bending axis to the distal end of the suture head, making the movement of the suture head more flexible and easier to perform surgical suturing in confined spaces. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is an external schematic diagram of a disposable endoscopic suturing device;

[0026] Figure 2 This is a schematic diagram of the protective cap structure of the forceps assembly of a disposable endoscopic suturing device;

[0027] Figure 3 This is a partial cross-sectional schematic diagram of a disposable endoscopic suturing device;

[0028] Figure 4 This is a schematic diagram of the rotating assembly of a disposable endoscopic suturing device;

[0029] Figure 5 This is a disassembled schematic diagram of the rotating component of a disposable endoscopic suturing device;

[0030] Figure 6 This is a schematic diagram of the bending assembly and bending joint assembly of a disposable endoscopic suture device;

[0031] Figure 7 This is a disassembled schematic diagram of the bending assembly and bending joint assembly of a disposable endoscopic suture device;

[0032] Figure 8 This is a schematic diagram of the internal connection status of a disposable endoscopic suturing device;

[0033] Figure 9 This is a disassembled schematic diagram of the suture needle forceps assembly of a disposable endoscopic suture device.

[0034] Figure 10 This is a schematic diagram showing the needle clamping state of the suture needle tip assembly of a disposable endoscopic suture device.

[0035] Figure 11 This is a schematic diagram of the operation of the suture needle forceps assembly of a disposable endoscopic suture device.

[0036] In the diagram: 1. Fixed handle, 2. Fixed bolt, 3. Needle loading button, 4. Rotating assembly, 5. Sleeve, 6. Pliers head assembly protective cap, 7. Bending dial, 8. Movable handle, 9. Suture wire, 10. Suture wire pulley, 11. Pulley fixing pin, 12. Wire lock, 13. Wire clamp, 14. Pressure plate wire pulley, 15. Pressure plate wire, 16. Rotating connecting rod positioning bead, 17. Rotating connecting rod, 18. Bending joint assembly, 19. Pliers head short tube, 20. Suture needle pliers head assembly, 21. Bending shaft, 22. Bending connecting pin, 23. Bending turntable, 24. Bending connecting rod, 25. Joint connecting rod, 26. Rack return spring, 27. Pressure plate wire tube, 28. Bending dial positioning bead, 29. Turntable insert.

[0037] 1-1. Movable handle mounting post; 4-1. Upper rotary dial; 4-2. Lower rotary dial; 4-3. Snap ring; 4-4. Rotary dial mounting post; 4-5. Reinforcing rib; 5-1. Butt groove; 5-2. Anti-reverse clip; 5-3. Sleeve mating groove; 6-1. Reinforcing rib of pliers head assembly protective cap; 7-1. Upper bending rotary dial; 7-2. Lower bending rotary dial; 8-1. Movable handle mounting hole; 8-2. Sew... 8-3. Wire mounting hole; 17-1. Grip firing port; 17-2. Groove; 17-3. Butt joint boss; 18-1. Rotating rod mating groove; 18-1. Left joint head; 18-2. Right joint head; 18-3. Pulley; 18-4. Right pin of joint head; 18-5. Left pin of joint head; 18-6. Joint container; 20-1. Rack seat; 20-2. Rack; 20-3. Pressure plate guide pin; 20-4. Pressure plate spring, 20-5; Needle loading pressure plate, 20-6; Needle loading pressure plate positioning screw, 20-7; Upper clamp head, 20-7-1; Suture needle mounting groove, 20-8; Anti-retracting needle, 20-9; Connecting piece, 20-9-1; Connecting piece positioning pin pre-drilled hole, 20-9-2; Connecting piece sliding limit groove, 20-9-3; Push needle mounting hole, 20-10; Push needle spring tube, 20-11; Push needle, 20-1 2. Push pin spring, 20-13. Lower clamp head, 20-13-1. Connecting plate limit pin, 20-13-2. Annular push pin groove, 20-13-4. Gear mounting groove, 20-13-5. Rack mounting groove, 20-14. Gear, 20-15. Gear washer, 20-15-1. Eccentric groove, 20-15-2. Gear mounting shaft, 20-16. Connecting plate positioning pin, 25-1. Limit ring. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the examples given in the accompanying drawings.

[0039] The proximal end of this invention refers to the end that is closer to the surgeon, and the distal end refers to the end that is farther away from the surgeon.

[0040] like Figure 1-3 As shown, a disposable endoscopic suturing device includes a fixed handle 1, a fixed bolt 2, a needle loading button 3, a rotating assembly 4, a sleeve 5, a clamp head assembly protective cap 6, a bending dial 7, a bending assembly, a movable handle 8, a suture wire 9, a pressure plate wire 15, a rotating extension rod 17, a bending joint assembly 18, a clamp head short tube 19, and a suture needle clamp head assembly 20.

[0041] The distal end of the movable handle 8 is provided with an elliptical grip firing port 8-3. The upper end of the movable handle 8 is provided with a movable handle mounting hole 8-1, which corresponds to the movable handle mounting post 1-1 of the fixed handle 1. The movable handle 8 can move within a certain range around the movable handle mounting post 1-1. The proximal end of the movable handle 8 is provided with a suture wire mounting hole 8-2. The proximal end of the sleeve 5 passes through the sleeve hole at the distal end of the fixed handle 1 and fits into the groove 17-1 at the distal end of the rotating connecting rod 17. The distal end is connected to the bending joint assembly 18. The proximal end of the short tube 19 of the forceps head is connected to the bending joint assembly 18, and the distal end is connected to the suture needle forceps head assembly 20. The proximal end of the suture wire 9 passes around two suture wire pulleys 10 fixed by pulley fixing pins 11, passes through the fixed handle 1, passes through the suture wire mounting hole 8-2 at the proximal end of the wire lock 12 and the movable handle 8, folds back and passes through the wire lock 12 again, and is locked and fastened by the wire lock. The distal end passes through the sleeve 5 and passes between the two pulleys 18-3 in the bending joint assembly 18, and connects to the rack seat 20-1 in the suture needle clamp head assembly 20 for driving the suture needle clamp head assembly 20 for continuous suturing. The proximal end of the clamp head assembly protective cap 6 is fitted onto the suture needle clamp head assembly 20, and the distal end is sealed.

[0042] like Figure 4-5 As shown, the rotation function of the utility model is achieved by the rotating dial positioning bead 16, the rotating connecting rod 17, the rotating assembly 4, and the sleeve 5.

[0043] The rotating assembly 4 has a rotating dial, which is divided into an upper rotating dial 4-1 and a lower rotating dial 4-2. The two parts are connected and fixed by a rotating dial mounting post 4-4. Each part has a retaining ring 4-3 at its proximal end, which engages with the rotating track at the distal end of the fixed handle 1. The distal end of the rotating connecting rod 17 has a rotating connecting rod anti-reverse groove 17-1, which cooperates with the anti-reverse clip 5-2 at the proximal end of the sleeve to ensure radial fixed connection. The distal end of the rotating connecting rod 17 has several mating bosses 17-2, which cooperate with several mating grooves 5-1 at the proximal end of the sleeve 5 to ensure axial fixed connection. The proximal end of the rotating connecting rod 17 has an annular transverse recess, which cooperates with the hemispherical protrusions at the front end of the rotating connecting rod positioning beads 16 on both sides. The positioning beads 16 are fixed in the reserved holes of the fixed handle 1. The inner side of the rotating dial has two reinforcing ribs 4-5, which, together with the sleeve groove 5-3 at the near end of the sleeve and the rotating rod groove 17-3 at the far end of the rotating rod, form a locking groove and allow it to rotate around the axis of the sleeve 5. When the rotating dials (upper rotating dial 4-1 and lower rotating dial 4-2) rotate, they drive the sleeve 5, the rotating rod 17, and the bending joint assembly 18 to rotate axially through the locking grooves. The positioning beads 16 of the rotating dial will sequentially change the groove positions that mate with the rotating rod 17, thereby realizing the rotation of the suture needle forceps head assembly 20.

[0044] like Figure 6-7As shown, the bending function of the utility model is realized by a bending assembly, which consists of a bending dial 7, a bending dial positioning bead 28, a bending shaft 21, a bending connecting pin 22, a bending turntable 23, a turntable insert 29, a bending connecting rod 24, a joint connecting rod 25, and a bending joint assembly 18. The bending dial 7 is composed of an upper bending dial 7-1 and a lower bending dial 7-2, which are fixed by the column of the upper bending dial 7-1 and the groove of the lower bending dial 7-2, and cooperate with the lower end of the bending shaft 21 to drive the bending shaft 21 to rotate. The bending turntable 23 cooperates with the upper end of the bending shaft 21 and rotates with the bending shaft 21. At the same time, there is an annular vertical groove on the outer circumference of the bending turntable 23, which cooperates with the bending dial positioning beads 28 on both sides. The bending dial positioning beads 28 are installed and fixed in the reserved holes of the fixed handle 1. The lower part of the bent connecting pin 22 fits into the slot of the bent turntable 23, and the upper part mates with the near-end opening of the bent connecting rod 24. The turntable insert 29 is installed in the slot of the bent turntable 23 and welded in place, with its arc surface facing the bent connecting pin 22, thus restricting the bent connecting pin 22 and preventing it from slipping off.

[0045] The proximal end of the joint connecting rod 25 is fitted onto the stepped structure at the distal end of the bent connecting rod 24. During the installation of the suture device, after the joint connecting rod 25 and the bent connecting rod 24 are connected, a limiting ring 25-1 is extruded on the joint connecting rod 25 at a position corresponding to the groove of the bent connecting rod 24. This ensures that the joint connecting rod 25 is connected to the bent connecting rod 24 with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod 25 passes through the reserved hole in the joint container 18-6 and is installed in conjunction with the pin on the left joint head 18-1. The bent joint assembly 18 consists of the left joint head 18-1, the right joint head 18-2, the pulley 18-3, the right pin of the joint head 18-4, the left pin of the joint head 18-5, and the joint container 18-6. Two pulleys 18-3 are mounted on the pulley pins of the right joint head 18-2. The left joint head 18-1 and the right joint head 18-2 are then assembled and installed inside the joint container 18-6, secured by the mating of the right joint head pin 18-4 and the left joint head pin 18-5. The proximal end of the joint container 18-6 is welded to the distal end of the sleeve 6. The assembled bending joint assembly 18 is capable of rotating axially around the right joint head pin 18-4 and the left joint head pin 18-5.

[0046] like Figure 8-9As shown, the proximal end of the suture wire 9 passes through two suture wire pulleys 10 fixed by pulley fixing pins 11, passes through the fixed handle 1, and is fastened to the proximal end of the movable handle 8 by a wire lock 12. The distal end passes through the sleeve 5 and passes between two pulleys 18-3 in the bending joint assembly 18, connecting to the rack seat 20-1 in the suture needle clamp head assembly 20, for driving the suture needle clamp head assembly to perform continuous suturing. Pressing the movable handle 8 pulls the proximal end of the suture wire 9 upward, changing direction through the two pulleys 10, pulling the rack seat 20-1 to move proximally, compressing the rack return spring 26 in the clamp head short tube 19, and simultaneously driving the rack 20-2 to move proximally, driving the gear assembly and suture needle to move; then releasing the movable handle 8 resets the compressed rack return spring 26, pushing the rack seat 20-1 to move distally, and simultaneously driving the rack 20-2 to move distally, thereby driving the gear assembly and suture needle to reset. This process is repeated to achieve tissue suturing.

[0047] The proximal end of the pressure plate wire 15 passes over the pressure plate wire pulley 14, which is fixed by the pulley fixing pin 11, and is fixed in the needle loading button 3 and the wire clamp 13. The distal end passes through the pressure plate wire tube 27, the rack seat 20-1, the pressure plate guide pin 20-3, and the pressure plate spring 20-4, and is fixedly connected to the needle loading pressure plate 20-5. When the needle loading button 3 is turned, the pressure plate wire 15 is pulled towards the proximal end, and the needle loading pressure plate 20-5 connected to its distal end moves towards the proximal end, exposing the suture needle mounting groove 20-7-1 at the distal end of the upper clamp head 20-7. At the same time, the pressure plate spring 20-4 is compressed. After the suture needle is loaded, the needle loading button 3 is released, the pressure plate spring 20-4 extends, and pushes the needle loading pressure plate 20-5 to return to its original position, thereby fixing the suture needle.

[0048] like Figure 10-11As shown, the suture needle clamp head assembly 20 consists of a rack seat 20-1, a rack 20-2, a pressure plate guide pin 20-3, a pressure plate spring 20-4, a needle loading pressure plate 20-5, a needle loading pressure plate positioning screw 20-6, an upper clamp head 20-7, a stop needle 20-8, a connecting piece 20-9, a push needle spring tube 20-10, a push needle 20-11, a push needle spring 20-12, a lower clamp head 20-13, a gear 20-14, a gear washer 20-15, and a connecting piece positioning pin 20-16. The gear seat 20-1 and rack 20-2 are welded together, and the gear 20-14 meshes with the rack 20-2, respectively installed in the gear mounting groove 20-13-3 and the rack mounting groove 20-13-4 of the lower clamp head 20-13. Gear 20-14 rotates around gear mounting shaft 20-15-2 of gear washer 20-15, and is mounted in eccentric groove 20-15-1 of gear washer 20-15 via connecting piece positioning pin 20-16, driving the proximal end of connecting piece 20-9. Simultaneously, connecting piece sliding limiting groove 20-9-2 of connecting piece 20-9 and connecting piece limiting pin 20-13-1 of lower clamp head 20-13 form a slide rail. Meanwhile, push pin spring tube 20-10 mates with push pin mounting hole 20-9-3 at the distal end of connecting piece 20-9, together with the slide rail, restricting the movement of connecting piece 20-9 along the U-shaped groove. A push pin spring 20-12 is mounted below push pin 20-11, and together they are mounted inside push pin spring tube 20-10. The upper jaw 20-7 and lower jaw 20-13 cooperate to fix the internal rack, gear assembly, and needle retraction assembly. The upper jaw 20-7 has a suture needle mounting groove 20-7-1, which cooperates with the suture needle. The suture needle is an arc-shaped suture needle. The anti-retraction needle 20-8 cooperates with and is fixed to the upper jaw 20-7. The upper jaw 20-7 is equipped with a pressure plate guide pin 20-3 at its proximal end. The pressure plate spring 20-4 is installed at the proximal end of the needle loading pressure plate 20-5 and cooperates with the pressure plate guide pin 20-3. The needle loading pressure plate positioning screw 20-6 cooperates with the threaded hole in the middle of the upper jaw 20-7, fixing the needle loading pressure plate 20-5 and limiting its movement position. When loading the needle, use it in conjunction with the suture box assembly. Press the needle loading button 3, and the pressure plate wire pulls 20-5 along the track limited by 20-6 towards the proximal end, exposing the annular suture needle groove. Align the proximal end of the suture box assembly with the clamp head for installation. After the suture needle is in place, release the needle loading button 3, and the needle loading pressure plate 20-5 returns to its original position, fixing the curved suture needle in the suture needle mounting groove 20-7-1. After use, press the needle loading button 3 again, and the needle loading pressure plate 20-5 moves towards the proximal end. The push needle 20-11 will eject the curved suture needle due to the extension of the push needle spring 20-12. Release the needle loading button 3, and the needle loading pressure plate 20-5 returns to its original position, making the process convenient and quick.

Claims

1. A disposable endoscopic suturing device, characterized in that, Includes a fixed handle, locking screw, needle loading button, rotating assembly, sleeve, clamp head assembly protective cap, bending assembly, movable handle, suture wire, pressure plate wire, rotating extension rod, bending joint assembly, clamp head short tube, and suture needle clamp head assembly; The lower end of the movable handle is provided with an elliptical grip firing port, and the upper end of the movable handle is provided with a movable handle mounting hole. The movable handle mounting hole is fitted with the movable handle mounting post at the corresponding position of the fixed handle and can rotate along the axial direction of the movable handle mounting post. The movable handle is provided with a stitching wire mounting hole. 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 clamp tube is connected to the bending joint assembly, and the distal end of the short clamp tube is connected to the suture needle clamp assembly. The proximal end of the suture wire passes around two suture wire pulleys fixed by pulley fixing pins, passes through the fixed handle, passes through the suture wire mounting hole at the proximal end of the wire lock and the movable handle, folds back and passes through the wire lock again, and is locked and fastened by the 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 connects to the rack seat in the suture needle clamp head assembly for driving the suture needle clamp head assembly to suture continuously.

2. The disposable endoscopic suturing device according to claim 1, characterized in that, The proximal end of the protective cap of the forceps assembly is fitted onto the suture needle forceps assembly, and the distal end of the protective cap of the forceps assembly is sealed.

3. The disposable endoscopic suturing device according to claim 1 or 2, characterized in that, The pliers head assembly protective cap is made of silicone or rubber, and has four reinforcing ribs inside.

4. The disposable endoscopic suturing device according to claim 1, characterized in that, The movable handle is designed to be closed, enabling both near-hand gripping and far-hand pushing away, and features a streamlined design at the turning point.

5. The disposable endoscopic suturing device according to claim 1, characterized in that, The bending assembly consists of a bending dial, a bending dial 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 dial is fixed in the slot at the far end of the fixed handle by the bending shaft and the bending turntable. The lower end of the bending connecting pin fits into the slot of the bending turntable, and the upper end is connected to the joint connecting rod. The turntable insert is installed in the slot of the bending turntable and welded in place, with its arc surface facing the bending connecting pin to restrict the bending connecting pin and prevent it from slipping off. The bending connecting rod is connected to the bending joint assembly through the joint connecting rod. By rotating the bending dial, the bending shaft, bending turntable, bending connecting pin, and bending connecting rod are driven, causing the joint connecting rod to drive the bending joint assembly to bend, thereby realizing the bending of the suture needle forceps head assembly.

6. The disposable endoscopic suturing device according to claim 5, characterized in that, During the installation of the suture device, after the joint connecting rod and the bending connecting rod are connected, a limiting ring is squeezed out at the position on the joint connecting rod corresponding to the groove of the bending connecting rod. This ensures that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. This avoids the bending connecting rod and the joint connecting rod interfering with the movement of the rotating component, thus allowing for a larger rotation space.

7. The disposable endoscopic suturing device according to claim 1, characterized in that, The rotating assembly features a rotating dial, which consists of an upper and a lower rotating dial. These two parts are connected and fixed via a rotating dial mounting post. Each part has a retaining ring at its proximal end, engaging with the rotating track at the distal end of the fixed handle. The distal end of the rotating rod has a rotating rod anti-reverse groove, which mates with an anti-reverse clip at the proximal end of the sleeve to ensure a radially fixed connection. The distal end of the rotating rod has several mating bosses that mate with several mating grooves at the proximal end of the sleeve to ensure an axially fixed connection. The inner side of the rotating dial has two mating reinforcing ribs that mate with the mating groove formed by the proximal end of the sleeve and the distal end of the rotating rod, allowing it to rotate around the sleeve's axis. When the rotating dial rotates, it drives the sleeve, rotating rod, and bending joint assembly to rotate axially via the mating groove, thereby achieving the rotation of the suture needle forceps head assembly.

8. The disposable endoscopic suturing device according to claim 1, characterized in that, The suture needle clamp head assembly includes a needle loading assembly, a rack assembly, a gear assembly, and a rack return spring. The clamp head short tube 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 via the rack return spring. The gear in the gear assembly meshes with the rack in the rack assembly. The suture wire, rack, and rack seat constitute the driving device for the entire suture needle clamp head assembly. When the suture wire pulls the rack seat, it drives the rack to move proximally, compressing the rack return spring, and the gear moves with the rack. Clockwise rotation causes the gear washer and connecting plate positioning pin to rotate with the gear. Since the connecting plate is restricted by the connecting plate limiting pin in the middle of the lower clamp head, the pusher needle and pusher needle spring tube move along the annular pusher needle groove at the far end of the lower clamp head. When the suture wire begins to loosen, the rack return spring extends, pushing the rack seat and rack to move to the far end. The gear rotates counterclockwise under the drive of the rack, and the gear washer and connecting plate positioning pin also rotate counterclockwise, causing the connecting plate to drive the pusher needle and pusher needle spring tube to retract. This process repeats, causing the suture needle to make reciprocating circular motions, completing the suturing operation.

9. The disposable endoscopic suturing device according to claim 8, characterized in that, The proximal end of the rack assembly has a short clamp tube for housing the rack return spring. The rack return spring will not be deflected due to compression. At the same time, when the suture needle is operated to the limit position, the rack seat will abut against the bending joint, and the short clamp tube and the suture needle clamp assembly are fixedly connected to ensure that the suture needle can be returned to its normal position.

10. The disposable endoscopic suturing device according to claim 8, characterized in that, The gear assembly includes a gear, a gear washer, a connecting plate locating pin, and a connecting plate. The gear mates with a gear mounting shaft along the axial direction of the gear washer. The gear washer has an eccentric groove. The connecting plate locating pin mates with the eccentric groove on the gear and gear washer and the pre-drilled hole at the near end of the connecting plate for positioning. The connecting plate has a sliding limiting groove in the middle, which mates with the connecting plate limiting pin of the lower clamp head. A push pin mounting hole is provided at the far end for mounting a push pin spring tube.

Images