Clamp head assembly of stitching instrument for endoscope
By designing the clamp head assembly and protective cap of the endoscopic stapler, the problem of damage to the clamp head assembly during transportation and storage is solved, the structural integrity and suturing accuracy of the stapler are guaranteed, and the operation process is simplified.
Patent Information
- Application Number
- CN202422624882.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing endoscopic staplers are prone to damage to the clamp head assembly due to bumps and collisions during transportation and storage, affecting suturing accuracy and sanitary conditions, and lack effective protection measures.
A forceps head assembly for an endoscopic suturing device is designed, which is matched with a forceps head assembly protective cap made of silicone or rubber, which has a buffering and protective effect. The gear is driven by a rack to run synchronously to ensure suturing accuracy and stability.
The structural integrity of the clamp head assembly is protected during transportation and storage, ensuring suturing accuracy and stability during use, while simplifying the operating process and improving suturing results.
Smart Images
Figure CN223473801U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, and in particular relates to the forceps assembly of an endoscopic suture device, which is used in conjunction with an endoscopic suture device for tissue suturing in surgical procedures. Background Technology
[0002] Currently, in surgeries involving organs and tissues such as the respiratory tract and genitourinary system, laparoscopic suture devices with anastomotic needles are often used to replace manual suturing in traditional surgery. These devices are particularly suitable for anastomosing surgeries of organs and tissues that are difficult to operate on, as they can improve surgical efficiency, reduce the risk of wound infection, and promote wound healing.
[0003] During transportation and storage, existing endoscopic suture devices inevitably experience bumps and collisions. The tip of the suture device has some sharp edges due to the need for surgical procedures. When bumps and collisions occur, they can tear the sterile protective bag and expose the device to the external environment, which leads to a lack of guarantee of the hygiene of the instrument. In addition, the more delicate needle holding part and bending joint of the instrument may sometimes shift or even be damaged, which cannot guarantee the suturing accuracy and normal operation of the instrument.
[0004] Currently, the forceps assembly and protective measures of endoscopic suture devices are not sufficiently advanced. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a clamping head assembly for an endoscopic suture device, which is used in conjunction with the endoscopic suture device for tissue suturing in surgical procedures.
[0006] The proximal end of this invention refers to the end closer to the surgeon, and the distal end refers to the end farther away from the surgeon.
[0007] The clamp head assembly of the endoscopic suture device is implemented using the following technical solution: The clamp head assembly of the endoscopic suture device includes a needle loading plate, a needle loading plate positioning screw, a plate spring, a plate guide pin, a clamp head, a connecting piece, a stop needle, a push needle spring tube, a push needle, a push needle spring, a connecting piece positioning pin, a gear washer, a gear, a rack, a rack seat, and a clamp head assembly protective cap.
[0008] The pliers consist of an upper pliers head and a lower pliers head. An assembly pin is provided near the lower pliers head for assembling the upper and lower pliers heads.
[0009] The needle loading clamp is provided with a guide sliding groove. An arc-shaped jaw is located at the distal end of the clamp, and a fixing hole is located at the proximal end for connecting and fixing the clamp wire. A clamp spring hole is also located at the proximal end of the clamp for installing a clamp spring. Limiting protrusions are provided on both sides of the distal end of the arc-shaped jaw.
[0010] The upper jaw is provided with a sliding groove for the needle loading plate at its upper part, and an arc-shaped jaw two is provided at its distal end. Needle loading plate limiting blocks are provided on both sides of the arc-shaped jaw two, and a suture needle mounting groove is provided at its proximal end. The suture needle mounting groove is a through groove for mounting suture needles. A stop-retraction needle groove is provided on one side of the suture needle mounting groove for mounting stop-retraction needles. A needle loading plate positioning hole is provided in the middle of the upper jaw head, corresponding to the sliding groove for the needle loading plate, for installation with a needle loading plate positioning screw. A pre-drilled hole for the pressure plate guide pin is provided at the proximal end of the upper jaw head for installing the pressure plate guide pin. The pressure plate guide pin has a through hole in the middle for the pressure plate wire connected to the needle loading plate to pass through.
[0011] The lower jaw has an arc-shaped jaw three at its distal end and an annular push pin groove at its proximal end. A gear pre-reserved groove is provided in the middle of the lower jaw for installing a gear, and a rack movable groove is provided on the side for rack movement. A connecting piece limiting post is provided at the distal end of the gear pre-reserved groove and at the corresponding position of the connecting piece sliding limiting groove, to cooperate with the connecting piece sliding limiting groove and restrict the sliding of the connecting piece.
[0012] The connecting piece has a push pin mounting hole at its far end, a connecting piece sliding limiting groove in its middle part, and a connecting piece positioning pin reserved hole at its near end for installing the connecting piece positioning pin.
[0013] The gear shim is provided with an eccentric groove, and a gear mounting shaft is provided at the central axis position for mounting with the gear.
[0014] The rack holder and the lower jaw have eccentrically positioned rack mounting holes corresponding to the rack's movable groove. A pressure plate wire threading hole is provided at a position corresponding to the pre-drilled hole for the guide pin of the upper jaw's proximal pressure plate. A stitching wire fixing hole is provided in the center. A stitching wire is installed near the rack holder and fixedly connected through the stitching wire fixing hole.
[0015] The protective cap of the clamp head assembly is made of silicone or rubber and is sized to match the clamp head assembly of the sewing machine. Its inner surface is provided with 4 reinforcing ribs, which fit tightly during installation.
[0016] During the assembly of the clamp head assembly, the pressure plate guide pin is installed in the mounting hole of the pressure plate guide pin at the proximal end of the upper clamp head. The pressure plate wire passes through the pressure plate guide pin and the pressure plate spring, and is fixedly connected to the needle loading pressure plate in the pressure plate spring hole at the proximal end of the needle loading pressure plate. The needle loading pressure plate is installed on one side of the upper clamp head by the needle loading pressure plate positioning screw. One end of the guide spring is fitted onto the pressure plate guide pin, and the other end abuts against the mounting hole of the guide spring at the proximal end of the needle loading pressure plate. The needle loading pressure plate can slide in the sliding groove of the needle loading pressure plate under the drive of the pressure plate wire. The suture needle with suture thread is installed in the annular groove at the distal end of the upper clamp head. The rack is installed in the rack sliding groove of the lower clamp head. The proximal end of the rack is fixed in the rack mounting hole of the rack seat. The gear is installed on the gear mounting shaft of the gear washer. Then, the gear and gear washer are installed in the gear mounting groove of the lower clamp head, and the gear and rack mesh.
[0017] The pusher spring tube is installed on the pusher mounting hole at the front end of the connecting piece. The pusher is inserted into the pusher spring tube, and the pusher spring is inserted into the pusher spring tube. The connecting piece positioning pin is installed in the pre-drilled hole of the connecting piece positioning pin at the near end of the connecting piece. Then, the connecting piece is installed on one side of the lower jaw head through the sliding limiting groove and the connecting piece limiting pin. At the same time, the pusher and pusher spring tube are inserted into the annular pusher groove, and the connecting piece fixing pin is inserted into the eccentric groove of the gear washer. The lower jaw head with the above components is assembled with the upper jaw head through the positioning pin to form the suture clamp head assembly. Finally, the clamp head assembly protective cap is put on the suture clamp head assembly to ensure a tight fit.
[0018] Compared with the prior art, the forceps assembly of the endoscopic suture device of this invention, used in conjunction with the endoscopic suture device for tissue suturing in surgical procedures, has the following advantages and advancements:
[0019] The protective cap on the clamp assembly of this invention serves as a buffer, protecting the clamp assembly during the transportation and storage of the endoscopic suture device and ensuring its structural integrity and accuracy during use. The protective cap is made of silicone or rubber, providing good elasticity and cushioning against significant impacts. Simply remove the protective cap for easy and quick use.
[0020] The suture clamp head assembly of this utility model drives the gear to run synchronously through a rack and pinion, which drives the connecting piece to drive the appropriate arc-shaped suture needle strictly according to the shape of the suture needle mounting groove. It is used in conjunction with an endoscopic suture device for tissue suturing in surgical procedures, resulting in better suturing effect. At the same time, the device has a simpler and more compact structure and a more stable drive. Attached Figure Description
[0021] The present invention will be further described below with reference to the accompanying drawings:
[0022] Figure 1This is a schematic diagram of the combination of the clamp head assembly protection device and the endoscope suture device of this utility model;
[0023] Figure 2 This is a cross-sectional schematic diagram of the protective cap for the pliers head assembly of this utility model;
[0024] Figure 3 This is an exploded view of the pliers head assembly of this utility model;
[0025] Figure 4 This is a schematic diagram of the arc-shaped suture needle applicable to this utility model;
[0026] Figure 5 This is a schematic diagram of the needle mounting process of the pliers head assembly of this utility model;
[0027] Figure 6 This is a schematic diagram of the starting position of the clamp head assembly of this utility model during one operation;
[0028] Figure 7 This is a schematic diagram of the intermediate position of the clamp head assembly during one operation of this utility model;
[0029] Figure 8 This is a schematic diagram showing the position at the end of one cycle of the clamp head assembly of this utility model;
[0030] In the diagram: 1. Endoscopic suture device; 2. Protective cap for the forceps assembly; 3. Rack seat; 4. Rack; 5. Pressure plate guide pin; 6. Pressure plate spring; 7. Needle loading pressure plate; 8. Needle loading pressure plate positioning screw; 9. Anti-retracting needle; 10. Upper forceps head; 11. Connecting piece; 12. Connecting piece positioning pin; 13. Push needle spring tube; 14. Push needle; 15. Push needle spring; 16. Gear washer; 17. Gear; 18. Lower forceps head; 19. Suture needle (curved needle).
[0031] 2-1. Reinforcing rib; 3-1. Rack mounting hole; 3-2. Pressure plate wire threading hole; 3-3. Suture wire fixing hole; 7-1. Guide sliding groove; 7-2. Arc-shaped jaw one; 7-3. Pressure plate spring hole; 7-4. Limiting protrusion; 10-1. Needle loading pressure plate sliding groove; 10-2. Arc-shaped jaw two; 10-3. Needle loading pressure plate limiting block; 10-4. Suture needle mounting groove; 10-5. Anti-retraction needle groove; 10-6. Needle loading pressure plate positioning hole. 11-1. Connecting piece sliding limit groove; 11-2. Push pin mounting hole; 11-3. Connecting piece positioning pin reserved hole; 16-1. Eccentric groove; 16-2. Gear mounting shaft; 18-1. Arc-shaped jaw three; 18-2. Annular push pin groove; 18-3. Gear reserved groove; 18-4. Rack movable groove; 18-5. Connecting piece limit pin; 18-6. Assembly pin; 19-1. Groove one; 19-2. Groove two; 19-3. Anti-reverse groove. Detailed Implementation
[0032] To make the structure and operation of this utility model clearer, the following detailed description of this utility model is provided with reference to the accompanying drawings and embodiments.
[0033] The proximal end of this invention refers to the end closer to the surgeon, and the distal end refers to the end farther away from the surgeon.
[0034] Reference Appendix Figure 1-3 The endoscope suture clamp assembly and the endoscope suture include an endoscope suture 1, a needle loading pressure plate 7, a needle loading pressure plate positioning screw 8, a pressure plate spring 6, a pressure plate guide pin 5, an upper clamp head 10, a lower clamp head 18, a connecting piece 11, a stop needle 9, a push needle spring tube 13, a push needle 14, a push needle spring 15, a connecting piece positioning pin 12, a gear washer 16, a gear 17, a rack 4, a rack seat 3, and a clamp assembly protective cap 2.
[0035] The protective cap 2 of the clamp assembly is fitted onto the clamp assembly of the endoscope suture 1 during transportation and storage. Because there are four evenly distributed reinforcing ribs 2-1 inside the protective cap 2 of the clamp assembly, it is not easy to fall off due to collision, and it is also easy to remove.
[0036] The upper jaw 10 and the lower jaw 18 form the main body of the jaw assembly, and the two are positioned and installed by the assembly pin 18-6 near the proximal end of the lower jaw 18.
[0037] The needle loading plate 7 is provided with a guide sliding groove 7-1, and an arc-shaped jaw 7-2 is provided at the distal end of the needle loading plate 7. A pressure plate spring hole 7-3 is also provided at the proximal end of the needle loading plate 7 for installing a pressure plate spring 6. Limiting protrusions 7-4 are provided on both sides of the distal end of the arc-shaped jaw 7-2. The pressure plate wire passes through the pressure plate spring 6 and is fixedly connected to the needle loading plate 7.
[0038] The upper jaw 10 has a needle-loading pressure plate sliding groove 10-1 on its upper part and an arc-shaped jaw 10-2 at its distal end. Needle-loading pressure plate limiting blocks 10-3 are provided on both sides of the arc-shaped jaw 10-2, and a suture needle mounting groove 10-4 is provided near its proximal end. This suture needle mounting groove is a through groove for mounting suture needles 19. A needle-retracting groove 10-5 is provided on one side of the suture needle mounting groove 10-4 for mounting a needle-retracting needle 9. A needle-loading pressure plate positioning hole 10-6 is provided in the middle of the upper jaw 10, corresponding to the needle-loading pressure plate guide sliding groove 7-1, for mounting with a needle-loading pressure plate positioning screw 8. A pressure plate guide pin pre-drilled hole 10-7 is provided near the upper jaw 10 for mounting a pressure plate guide pin 5. The pressure plate guide pin 5 has a through hole in the middle for the pressure plate wire connected to the needle-loading pressure plate 7 to pass through.
[0039] The lower jaw 18 has an arc-shaped jaw 18-1 at its distal end and an annular push pin groove 18-2 at its proximal end. A gear pre-reserved groove 18-3 is provided in the middle of the lower jaw 18 for mounting a gear 17, and a rack movable groove 18-4 is provided on the side for the rack 4 to move. A connecting piece limiting pin 18-5 is provided at the distal end of the gear pre-reserved groove 18-3 and at a position corresponding to the connecting piece sliding limiting groove 11-1, for engaging with the connecting piece sliding limiting groove 11-1 to restrict the movement of the connecting piece 11.
[0040] The connecting piece 11 has a push pin mounting hole 11-2 at its far end, a connecting piece sliding limiting groove 11-1 in its middle part, and a connecting piece positioning pin reserved hole 11-3 at its near end for installing the connecting piece positioning pin 12.
[0041] The gear shim 16 is provided with an eccentric groove 16-1, and a gear mounting shaft 16-2 is provided on the central axis for mounting with the gear 17.
[0042] The rack seat 3 and the lower jaw 18 have eccentrically positioned rack mounting holes 3-1 corresponding to the rack movable groove 18-4. A pressure plate wire threading hole 3-2 is provided at a position corresponding to the pre-drilled hole 10-7 of the guide pin on the proximal end of the upper jaw 10. A stitching wire fixing hole 3-3 is provided at the center. A stitching wire is installed near the proximal end of the rack seat 3 and is fixedly connected through the stitching wire fixing hole 3-3.
[0043] During the assembly of the suture clamp head assembly, the pressure plate guide pin 5 is installed in the pressure plate guide pin mounting hole 10-7 near the upper clamp head 10. The pressure plate wire passes through the pressure plate guide pin 5 and the pressure plate spring 6, and is fixedly connected to the needle loading pressure plate 7 in the pressure plate spring hole 7-3 near the needle loading pressure plate 7. The needle loading pressure plate 7 is installed on one side of the upper clamp head 10 by the needle loading pressure plate positioning screw 8. One end of the pressure plate spring 6 is fitted onto the pressure plate guide pin 5, and the other end abuts against the pressure plate guide spring mounting hole 7-3 near the needle loading pressure plate 7. The needle loading pressure plate 7 can slide within the needle loading pressure plate sliding groove 7-1 under the drive of the pressure plate wire. A suture needle 19 with a suture thread is installed in the annular groove 10-4 at the distal end of the upper clamp head 10. A rack 4 is installed in the sliding groove of the rack 18-4 of the lower clamp head 18. The proximal end of the rack 4 is fixed in the rack mounting hole 3-1 provided in the rack seat 3. A gear 17 is installed on the gear mounting shaft 16-2 of the gear washer 16. The gear 17 is then linked to the gear washer 16 and installed in the gear mounting groove 18-3 of the lower clamp head 18. The gear 17 and the rack 4 mesh.
[0044] The pusher spring tube 5 is installed on the pusher mounting hole 11-2 at the distal end of the connecting piece 11. The pusher 14 is inserted into the pusher spring tube 13, and the pusher spring 15 is inserted into the pusher spring tube 13. The connecting piece positioning pin 12 is installed in the connecting piece positioning pin reserved hole 11-3 at the proximal end of the connecting piece 11. The connecting piece 11 is then installed on one side of the lower jaw 18 through the sliding limiting groove 11-1 and the connecting piece limiting pin 18-5. At the same time, the assembled pusher 14, pusher spring tube 13, and pusher spring 15 are inserted into the annular pusher groove 18-2. The connecting piece fixing pin 12 is further inserted into the eccentric groove 16-1 of the gear washer 16. The lower jaw 18, which contains the above components, is assembled with the upper jaw 10 through the assembly pin 18-6 to form the suture clamp head assembly. Finally, the clamp head assembly protective cap 2 is put on the suture clamp head assembly to ensure a tight fit.
[0045] See attached document Figure 4 The suture needle (arc needle) 19 has a groove 19-1 and a groove 19-2 on the same side of the needle tail and the needle head, respectively. The two are symmetrical about the center of the arc needle. There is a backlash groove 19-3 on the surface near the needle head and the groove 19-2.
[0046] See attached document Figure 5 When installing the aforementioned suture needle (arc needle) 19, as follows: Figure 5 a. Pull the pressure plate wire. The needle-loading pressure plate 7 moves proximally under the constraint of the needle-loading pressure plate positioning screw 8 and the needle-loading pressure plate sliding groove 10-1, exposing the suture needle mounting groove 10-4 in the upper clamp head 10. After inserting the suture needle (curved needle) 19, as... Figure 5 b and c, the pusher needle 14 enters the groove 19-2 on one side of the needle tip of the suture needle (curved needle) 19 and is pressed downwards, compressing the pusher needle spring 15. At this time, the pressure plate wire is released, as... Figure 5 d. The pressure plate spring 15 extends, pushing the needle loading pressure plate 7 to move to the distal end under the restriction of the needle loading pressure plate positioning screw 8 and the needle loading pressure plate sliding groove 10-1, forcing the limiting protrusion 7-4 to press against the needle loading pressure plate limiting block 10-3, and the suture needle (arc needle) 19 is completely fixed.
[0047] During the operation, refer to the appendix. Figure 6 , Figure 7 , Figure 8As shown, when the rack seat 3 and rack 4 move proximally due to the pulling of the suture wire, the gear 17 and rack 4 mesh, causing gear 17, gear washer 16, and connecting piece positioning pin 12 to move in an arc around the center of gear 17. The proximally connected to the connecting piece positioning pin 12 is driven by the connecting piece positioning pin 12 to move in an arc. Because the middle part of the connecting piece 11 is restricted by the connecting piece limiting pin 18-5, the distal end of the connecting piece 11 moves in an arc along the annular pusher groove 18-2 in the opposite direction to the proximally connected end, driving the pusher spring tube 13 to move. The pusher 14 is installed in the pusher spring tube 13 and, through the connection with the arc-shaped needle groove two at the top, drives the suture needle (arc-shaped needle) 19 to move. When the rack and rack seat finish moving, as shown in the attached diagram... Figure 7 As shown, the distal end of the connecting piece drives the pusher pin to the other end of 10-4. At this time, the first groove on the arc-shaped needle moves 180° and reaches the original position of the second groove. The distal end of the anti-reverse needle is in the anti-reverse groove 19-3, referring to the working state of the anti-reverse needle. When the rack 4 and rack seat 3 are reset, they drive the gear 17, gear washer 16 and connecting piece positioning pin 12 to make a returning arc motion. The connecting piece 11 forces the pusher pin 14 to return to its original position along the arc-shaped pusher pin groove 18-2. At this time, because the side of the arc-shaped needle groove 19-2 away from the needle head is inclined, the pusher pin 14 can continue to move due to the further compression of the pusher pin spring 15 below. However, the suture needle (arc-shaped needle) 19 cannot move because the anti-reverse groove 19-3 and the anti-reverse needle 9 are in conflict in the direction of movement, referring to the internal state of the clamp head. See attached Figure 8 As shown, when the pusher needle 14 moves to the groove 19-1 on the suture needle (arc needle) 19, the extension of the pusher needle spring 15 causes the pusher needle 14 to move upward and enter the arc needle groove 19-1. When the rack 4 and rack seat 3 move again, the other side of the arc needle anti-reverse groove 19-3 is an inclined surface and will not collide with the anti-reverse needle 9, allowing the suture needle (arc needle) 19 to continue moving 180°. The above operation is repeated for tissue suturing until the tissue suturing is completed.
Claims
1. A forceps assembly for an endoscopic suture device, characterized in that, Includes needle loading pressure plate, needle loading pressure plate positioning screw, pressure plate spring, pressure plate guide pin, pliers head, connecting piece, anti-reverse needle, push needle spring tube, push needle, push needle spring, connecting piece positioning pin, gear washer, gear, rack, rack seat, and pliers head assembly protective cap. The pliers head consists of an upper pliers head and a lower pliers head, which are positioned and installed by an assembly pin near the proximal end of the lower pliers head; The needle loading plate is provided with a guide sliding groove. The distal end of the needle loading plate is provided with an arc-shaped jaw, and the proximal end is provided with a fixing hole for connecting and fixing the pressure plate wire. The proximal end of the needle loading plate is also provided with a pressure plate spring hole for installing the pressure plate spring. Limiting protrusions are provided on both sides of the distal end of the arc-shaped jaw. The upper jaw is provided with a sliding groove for the needle loading plate at the upper part, and an arc-shaped jaw two at the distal end. Needle loading plate limiting blocks are provided on both sides of the arc-shaped jaw two. A suture needle mounting groove is provided at the proximal end. The suture needle mounting groove is a through groove for mounting suture needles. A stop-retraction needle groove is provided on one side of the suture needle mounting groove for mounting stop-retraction needles. A needle loading plate positioning hole is provided in the middle of the upper jaw, corresponding to the sliding groove for the needle loading plate, for installation with a needle loading plate positioning screw. A pre-drilled hole for the pressure plate guide pin is provided at the proximal end of the upper jaw for installing the pressure plate guide pin. The pressure plate guide pin has a through hole in the middle for the pressure plate wire connected to the needle loading plate to pass through. The lower jaw has an arc-shaped jaw three at its distal end and an annular push pin groove at its proximal end. A gear pre-reserved groove is provided in the middle part of the lower jaw for installing a gear. There is a rack movable groove on the side for the rack to move. A connecting piece limiting post is provided at the distal end of the gear pre-reserved groove and at the corresponding position of the connecting piece sliding limiting groove. It is used to cooperate with the connecting piece sliding limiting groove to limit the sliding of the connecting piece.
2. The forceps assembly of the endoscopic suture device according to claim 1, characterized in that, The connecting piece has a push pin mounting hole at its far end, a connecting piece sliding limit groove in its middle part, and a connecting piece positioning pin reserved hole at its near end for installing the connecting piece positioning pin.
3. The forceps assembly of the endoscopic suture device according to claim 1, characterized in that, The gear shim is provided with an eccentric groove, and a gear mounting shaft is provided at the central axis position for mounting with the gear.
4. The forceps assembly of the endoscopic suture device according to claim 1, characterized in that, The rack seat and the lower jaw have rack mounting holes at eccentric positions corresponding to the rack movable grooves. The upper jaw has wire threading holes at positions corresponding to the guide pin pre-drilled holes of the pressure plate near the upper jaw. The center has a wire fixing hole for the stitching wire. The rack seat is fitted with a wire for stitching near the end, and the wire is fixedly connected through the wire fixing hole.
5. The forceps assembly of the endoscopic suture device according to claim 1, characterized in that, The protective cap of the clamp head assembly is made of silicone or rubber and is sized to match the clamp head assembly of the sewing machine. It has four reinforcing ribs on its inner surface and fits tightly to the clamp head assembly during installation.
6. The forceps assembly of the endoscopic suture device according to claim 1, characterized in that, When assembling the forceps assembly of the endoscopic suture device, the pressure plate guide pin is installed in the pressure plate guide pin mounting hole at the proximal end of the upper forceps. The pressure plate wire passes through the pressure plate guide pin and the pressure plate spring, and is fixedly connected to the needle loading pressure plate in the pressure plate spring hole at the proximal end of the needle loading pressure plate. The needle loading pressure plate is installed on one side of the upper forceps by the needle loading pressure plate positioning screw. One end of the guide spring is fitted on the pressure plate guide pin, and the other end abuts against the guide spring mounting hole at the proximal end of the needle loading pressure plate. The needle loading pressure plate can slide in the sliding groove of the needle loading pressure plate under the drive of the pressure plate wire. The suture needle with suture thread is installed in the annular groove at the distal end of the upper forceps. The rack is installed in the rack sliding groove of the lower forceps. The proximal end of the rack is fixed in the rack mounting hole provided in the rack seat. The gear is installed on the gear mounting shaft of the gear washer. Then the gear linkage gear washer is installed in the gear mounting groove of the lower forceps. The gear and rack mesh. Install the pusher spring tube on the pusher mounting hole at the front end of the connecting piece, insert the pusher into the pusher spring tube, insert the pusher spring into the pusher spring tube, install the connecting piece positioning pin in the pre-drilled hole of the connecting piece positioning pin at the near end of the connecting piece, then install the connecting piece on one side of the lower clamp head through the sliding limiting groove and the connecting piece limiting pin, while inserting the pusher and pusher spring tube into the annular pusher groove, and further inserting the connecting piece fixing pin into the eccentric groove of the gear washer. The lower clamp head with the above components is assembled with the upper clamp head through the assembly pin to form the suture clamp head assembly. Finally, put the clamp head assembly protective cap on the suture clamp head assembly to make it fit tightly.