A secondary pressing type suture gun

Abstract

The present invention discloses a secondary pressing type suture gun. The key points of its technical solution include a housing; a connecting pipe; a wrench; a trigger, wherein a clamping groove is provided on the trigger; a clamping block; a clamping control member; and a needle pushing rod. When the clamping groove is outside the housing, the outer wrench is pressed tightly, and the clamping control member rotates following the inner wrench until the clamping block is clamped in the clamping groove, at which time the fixed jaw and the movable jaw are clamped. When the trigger is toggled to further press the outer wrench and push a part of the clamping groove into the housing, the clamping control member stops swinging, and the needle pushing rod rotates following the inner wrench under the action of the connecting rod to push the suture needle out. Through the connection between the wrench and the clamping control member and the needle pushing rod, the pressing of the wrench in one direction can be carried out in two times, respectively realizing the actions of clamping and pushing out the suture needle, which simplifies the operation process.

Description

Technical Field

[0001] The present invention relates to a suture gun, and more specifically, to a secondary pressing type suture gun. Background Art

[0002] A suture gun is a surgical instrument used for suturing human tissues after surgery. The doctor fires by pulling the wrench on the handle of the suture gun, continuously pulling and releasing the steel wire rope, driving the front swing head to drive the suture needle to continuously rotate, and piercing the human tissue for suturing.

[0003] The front end of the existing suture gun is provided with a grasping jaw, which is used to clamp the tissue to be sutured before the suture needle moves, facilitating the subsequent suturing operation of the suture needle.

[0004] However, in the prior art, most of the grasping jaws of the suture needle are provided with a separate driving component. After clamping the tissue, the driving component is required to lock the jaw, and then the suture needle is driven by the wrench for suturing operation. As a result, each suturing requires separate operation of the driving component and the wrench, increasing the complexity of the operation. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a secondary pressing type suture gun, which simplifies the operation process by connecting the wrench with the clamping control part and the needle pushing rod. The pressing of the wrench in one direction can be carried out in two steps, respectively realizing the clamping and the pushing out of the suture needle.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A secondary pressing type suture gun, comprising a housing;

[0007] A connecting pipe, the connecting pipe is fixedly connected to the front end of the housing. The front end of the connecting pipe is provided with a fixed jaw and a movable jaw forming the jaw, and a suture needle that can pass through the fixed jaw and the movable jaw;

[0008] A wrench, the wrench is rotatably connected to the housing. The wrench is composed of an outer wrench and an inner wrench. The outer wrench is located outside the housing, and the inner wrench is located inside the housing. The connection part between the outer wrench and the inner wrench is rotatably connected to the housing;

[0009] A trigger, one end of the trigger is rotatably connected to the wrench, and the other end extends into the housing. A card slot is provided on the trigger;

[0010] A clamping block, the clamping block is fixedly connected to the housing and fits against the side of the trigger provided with the card slot;

[0011] A clamping control member, which is rotatably connected inside the housing. A connecting pin for driving the clamping control member to rotate is provided on the inner wrench. The clamping control member is used to drive the movable jaw to clamp on the fixed jaw.

[0012] And a push needle rod, which is rotatably connected inside the housing and is used to drive the suture needle to perform a suturing action. The push needle rod is connected to the inner wrench through a connecting rod. Both ends of the connecting rod are rotatably connected to the push needle rod and the inner wrench respectively.

[0013] When the card slot is outside the housing, press the outer wrench. The clamping control member rotates following the inner wrench until the block is clamped in the card slot, then the fixed jaw and the movable jaw are clamped. When the trigger is toggled to further press the outer wrench and push part of the card slot into the housing, the clamping control member stops swinging and the push needle rod rotates following the inner wrench under the action of the connecting rod to push the suture needle out.

[0014] The present invention is further provided as: A snap needle is rotatably connected to one end at the top of the push needle rod. The snap needle is connected to the suture needle. When the one end at the top of the push needle rod swings towards the side close to the snap needle, it pushes the suture needle out.

[0015] The present invention is further provided as: The connection part of the outer wrench and the inner wrench is located on the side of the push needle rod close to the suture needle. The connecting rod is located between the connection part of the push needle rod and the outer wrench and the inner wrench.

[0016] Taking the rotation axis of the wrench as the center of a circle, a first circle is formed with the distance between the connection point of the connecting rod and the inner wrench and the rotation axis of the half shaft as the radius. Taking the rotation axis of the connecting rod on the push needle rod in the initial state when the wrench is not pressed as the center of a circle, a second circle is formed with the distance between the connection point of the connecting rod on the push needle rod and the connection point of the connecting rod on the inner wrench as the radius. There are two intersection points between the first circle and the second circle, namely the lower intersection point and the upper intersection point.

[0017] In the initial state when the wrench is not pressed, the connection point of the connecting rod and the inner wrench is located at the lower intersection point. When the wrench is pressed until the block is inserted into the card slot, the connection point of the connecting rod and the inner wrench is located at the upper intersection point.

[0018] The present invention is further provided as: A pull rod is hinged to the top of the clamping control member. The other end of the pull rod is connected to the movable jaw. When the clamping control member drives the pull rod to slide away from the movable jaw, the pull rod drives the movable jaw to clamp on the fixed jaw.

[0019] The present invention is further provided as: A control groove is provided on the clamping control member. The connecting pin is located in the control groove. The groove wall on the side of the control groove away from the movable jaw is set as the control groove wall and is in fit with the connecting pin.

[0020] The control groove is set as a planar section and an arc section located at the top of the planar section. In the initial state when the wrench is not pressed, the connecting pin contacts the position near the bottom of the planar section. When the clamping block is inserted into the clamping groove, the connecting pin contacts the connection part of the planar section and the arc section, and at this time, the arc section coincides with the rotation arc of the connecting pin.

[0021] The present invention is further configured as: the trigger includes an extension section, the clamping groove is arranged on the extension section and the end of the extension section away from the outer wrench extends into the shell;

[0022] and a connecting section, the connecting section is hinged to the outer wrench and extends downward below the outer wrench;

[0023] An unlocking spring is arranged between the connecting section and the outer wrench. The unlocking spring is located above the hinge point of the connecting section and the outer wrench and the unlocking spring is in a compressed state to press the extension section against the clamping block.

[0024] The present invention is further configured as: it further includes a return spring, one end of the return spring is connected to the inner wrench, and the other end is fixedly connected to a return pin in the shell.

[0025] The present invention is further configured as: a needle sleeve rotatably connected in the connecting pipe is arranged in the connecting pipe, the suture needle passes through the needle sleeve and is connected to the snap needle, a connecting groove is arranged at the top of the end of the suture needle connected to the snap needle, a connecting block is arranged at the bottom of the end of the snap needle connected to the suture needle, and the connecting block can be snapped into the connecting groove;

[0026] One end of the needle sleeve is rotatably connected to the connecting pipe, and an elastic member is arranged at the bottom of the other end. When the elastic member is in a normal state, the connecting block is snapped into the connecting groove.

[0027] The present invention is further configured as: it further includes a pressing block, the pressing block is rotatably connected to the shell, the pressing block is located above the needle sleeve, the bottom of the pressing block contacts the top of the needle sleeve and the top of the pressing block extends upward out of the shell.

[0028] The present invention is further configured as: a spring piece is detachably connected to the movable jaw head, a receiving groove for receiving the spring piece is arranged at the front end of the movable jaw head, a clamping groove is arranged at the bottom of the receiving groove close to the connecting pipe side, a clamping piece is fixedly connected to one end of the spring piece close to the clamping groove, and one end of the clamping piece close to the clamping groove is upturned and can be snapped into the clamping groove.

[0029] In summary, the present invention has the following beneficial effects compared with the prior art:

[0030] 1. Through the connection of the wrench with the clamping control member and the needle pushing rod, the pressing of the wrench in one direction can be carried out in two times, respectively realizing the actions of clamping and pushing out the suture needle, which simplifies the operation process;

[0031] 2. Through the setting of double pressing, during the suture process, doctors can take a short rest and pause. After the pause, they only need to press again to lock and clamp the grasped tissue and complete the subsequent suture operation.

[0032] 3. By replacing the suture needle and the spring piece, the suture gun of the present invention can be used multiple times, extending its service life and reducing medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of Embodiment 1;

[0034] Figure 2 is a cross-sectional view of the overall structure of Embodiment 1;

[0035] Figure 3 is a schematic diagram showing the first circle and the second circle in Embodiment 1;

[0036] Figure 4 is Figure 3 an enlarged schematic view of part A of

[0037] Figure 5 is Figure 3 an enlarged schematic view of part B of

[0038] Figure 6 is Figure 3 an enlarged schematic view of part C of

[0039] Figure 7 is a schematic diagram showing the spring piece in the embodiment;

[0040] Figure 8 is a schematic diagram of the overall structure of Embodiment 2;

[0041] Figure 9 is a schematic diagram of the overall structure of Embodiment 3;

[0042] Figure 10 is a schematic diagram of the overall structure of Embodiment 4;

[0043] Figure 11 is a schematic diagram of the overall structure of Embodiment 5.

[0044] In the figure: 1. Housing; 11. Return spring; 2. Connecting pipe; 21. Movable jaw; 211. Receiving groove; 22. Fixed jaw; 3. Wrench; 31. Outer wrench; 32. Inner wrench; 321. Connecting pin; 33. First circle; 34. Second circle; 35. Low intersection point; 36. High intersection point; 4. Trigger; 41. Extension section; 411. Card slot; 412. Card block; 42. Connecting section; 421. Unlocking spring; 5. Clamping control part; 51. Flat section; 52. Arc section; 6. Needle pushing rod; 61. Connecting rod; 62. Buckling needle; 621. Connecting block; 63. Suture needle; 631. Connecting groove; 71. Needle sleeve; 72. Elastic part; 73. Pressing block; 8. Spring piece; 81. Clamping piece; 91. Main body part; 92. Pressing part; 93. Pressing head; 94. Preset groove; 95. Clamping groove; 96. Clamping part. Detailed implementation mode

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only the directions referring to the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0046] The present invention will be further described below in conjunction with the drawings and preferred embodiments.

[0047] Embodiment 1: A secondary pressing type suture gun, see attached Figure 1 - attached Figure 7, including a housing 1, a connecting pipe 2, a wrench 3, a trigger 4, a clamping block 412, a clamping control member 5, and a needle pushing rod 6; the connecting pipe 2 is fixedly connected to the front end of the housing 1, and the front end of the connecting pipe 2 is provided with a fixed jaw 22 and a movable jaw 21 that form a pair of pliers, and a suture needle 63 that can pass through the fixed jaw 22 and the movable jaw 21; the wrench 3 is rotatably connected to the housing 1, and the wrench 3 is composed of an outer wrench 31 and an inner wrench 32. The outer wrench 31 is located outside the housing 1, and the inner wrench 32 is located inside the housing 1. The connection part of the outer wrench 31 and the inner wrench 32 is rotatably connected to the housing 1; one end of the trigger 4 is rotatably connected to the wrench 3, and the other end extends into the housing 1. A card slot 411 is provided on the trigger 4; the clamping block 412 is fixedly connected inside the housing 1 and fits against one side of the trigger 4 where the card slot 411 is provided; the clamping control member 5 is rotatably connected inside the housing 1. A connecting pin 321 for driving the clamping control member 5 to rotate is provided on the inner wrench 32. The clamping control member 5 is used to drive the movable jaw 21 to clamp on the fixed jaw 22; the needle pushing rod 6 is rotatably connected inside the housing 1 and is used to drive the suture needle 63 to perform a suturing action. The needle pushing rod 6 is connected to the inner wrench 32 through a connecting rod 61. Both ends of the connecting rod 61 are rotatably connected to the needle pushing rod 6 and the inner wrench 32 respectively; when the card slot 411 is located outside the housing 1, the outer wrench 31 is pressed tightly. The clamping control member 5 rotates following the inner wrench 32 until the clamping block 412 is clamped in the card slot 411, and the fixed jaw 22 and the movable jaw 21 are clamped. When the trigger 4 is toggled to make the outer wrench 31 continue to be pressed tightly and push the card slot 411 partially into the housing 1, the clamping control member 5 stops swinging, and the needle pushing rod 6 rotates following the inner wrench 32 under the action of the connecting rod 61 and pushes the suture needle 63 out.

[0048] During the process of pressing the wrench 3, the first press will be realized first. After the clamping block 412 is inserted into the card slot 411 during the first press, due to the cooperation of the card slot 411 and the clamping block 412, the continuous pressing of the wrench 3 is blocked. During this process, the inner wrench 32 drives the clamping control member 5 to rotate, thereby driving the movable jaw 21 to clamp on the fixed jaw 22. During this process, the needle pushing rod 6 does not push the suture needle 63 out; then by toggling the trigger 4, the clamping block 412 is separated from the card slot 411, and then the wrench 3 can be continuously pressed for a second press. During the second press, the rotating rod of the inner wrench 32 will not drive the clamping control member 5 to continue rotating, but the inner wrench 32 will drive the needle pushing rod 6 to rotate and then push the suture needle 63 out. Then the wrench 3 rotates in the reverse direction to a state where the clamping block 412 is close to the card slot 411, and then continue the process of the second press, so that the suture needle 63 continuously performs the actions of extending and retracting to achieve suturing. During the suturing process, the movable jaw 21 and the fixed jaw 22 always maintain the clamping of the tissue.

[0049] Specifically, a snap needle 62 is rotatably connected to the top end of the needle pushing rod 6. The snap needle 62 is connected to the suture needle 63. When the top end of the needle pushing rod 6 swings towards the side close to the snap needle 62, the suture needle 63 is pushed out.

[0050] Specifically, the connection part of the outer wrench 31 and the inner wrench 32 is located on the side of the needle pushing rod 6 close to the suture needle 63. The connecting rod 61 is located between the connection part of the needle pushing rod 6 and the outer wrench 31 and the inner wrench 32; with the rotation axis of the wrench 3 as the center, a first circle 33 is formed with the distance between the connection point of the connecting rod 61 and the inner wrench 32 and the rotation axis of the half shaft as the radius. With the rotation axis of the connecting rod 61 on the needle pushing rod 6 in the initial state when the wrench 3 is not pressed as the center, a second circle 34 is formed with the distance between the connection point of the connecting rod 61 on the needle pushing rod 6 and the connection point of the connecting rod 61 on the inner wrench as the radius. There are two intersection points between the first circle 33 and the second circle 34, namely the low intersection point 35 and the high intersection point 36; in the initial state when the wrench 3 is not pressed, the connection point of the connecting rod 61 and the inner wrench 32 is located at the low intersection point 35. When the wrench 3 is pressed until the block 412 is snapped into the card slot 411, the connection point of the connecting rod 61 and the inner wrench 32 is located at the high intersection point 36.

[0051] During the process of pressing the outer wrench 31 to move the connection point of the connecting rod 61 and the inner wrench 32 from the low intersection point 35 to the high intersection point 36, not only will it not drive the needle pushing rod 6 to rotate towards the direction close to the suture needle 63, but it will instead push the needle pushing rod 6 to swing slightly towards the direction away from the suture needle 63, thus ensuring that during the first press, the suture needle 63 will not protrude. And when the connection point of the connecting rod 61 and the inner wrench 32 continues to move upward from the high intersection point 3, the needle pushing rod 6 will be driven by the connecting rod 61 to move towards the direction close to the suture needle 63, thereby pushing the suture needle 63 to achieve the action of protruding.

[0052] Specifically, a pull rod is hinged to the top of the clamping control member 5. The other end of the pull rod is connected to the movable jaw 21. When the clamping control member 5 drives the pull rod to slide away from the movable jaw 21, the pull rod drives the movable jaw 21 to clamp on the fixed jaw 22.

[0053] Specifically, a control groove is provided on the clamping control member 5. The connecting pin 321 is located in the control groove. The groove wall on the side of the control groove away from the movable jaw 21 is set as the control groove wall and is in contact with the connecting pin 321; the control groove is set as a planar section 51 and an arc section 52 located at the top of the planar section 51. In the initial state when the wrench 3 is not pressed, the connecting pin 321 contacts the position close to the bottom of the planar section 51. When the block 412 is snapped into the card slot 411, the connecting pin 321 contacts the connection part of the planar section 51 and the arc section 52, and at this time, the arc section 52 coincides with the rotation arc of the connecting pin 321.

[0054] By setting the two sections of the control groove wall on the control groove, during the first pressing process, the clamping control part 5 can slide the device in the direction away from the fixed clamp head 22 to pull the movable clamp head 21 and the fixed clamp head 22 to clamp. Then, during the second pressing process, the connecting pin 321 contacts the arc segment 52. Due to the setting of the arc segment 52, the position of the clamping control part 5 remains stationary, which allows the movable clamp head 21 and the fixed clamp head 22 to maintain the clamping action.

[0055] Specifically, the trigger 4 includes an extension section 41 and a connecting section 42, the card slot 411 is set on the extension section 41 and the end of the extension section 41 away from the external wrench 31 extends into the shell 1; the connecting section 42 is hinged on the external wrench 31 and extends downwardly from the external wrench 31; an unlocking spring 421 is provided between the connecting section 42 and the external wrench 31, the unlocking spring 421 is located above the hinge point between the connecting section 42 and the external wrench 31 and the unlocking spring 421 is in a compressed state to press the extension section 41 tightly against the card block 412.

[0056] Specifically, this embodiment further includes a reset spring 11 , one end of which is connected to the inner wrench 32 , and the other end of which is fixedly connected to the reset pin in the housing 1 .

[0057] Specifically, a needle sleeve 71 is provided within the connecting tube 2 and is rotatably connected thereto. The suture needle 63 passes through the needle sleeve 71 and is connected to the snap needle 62. A connecting groove 631 is provided at the top of the end where the suture needle 63 and snap needle 62 are connected, and a connecting block 621 is provided at the bottom of the end where the snap needle 62 and suture needle 63 are connected. The connecting block 621 can be snapped into the connecting groove 631. One end of the needle sleeve 71 is rotatably connected to the connecting tube 2, and an elastic member 72 is provided at the bottom of the other end. When the elastic member 72 is in a normal state, the connecting block 621 snaps into the connecting groove 631. Specifically, this embodiment also includes a pressing block 73, which is rotatably connected to the housing 1 and is located above the needle sleeve 71. The bottom of the pressing block 73 contacts the top of the needle sleeve 71, and the top of the pressing block 73 extends upward from the housing 1. Specifically, the elastic member 72 is configured as a spring.

[0058] The arrangement of the pressing block 73 and the needle sleeve 71 facilitates the installation and removal of the suture needle 63 .

[0059] Specifically, the spring sheet 8 is detachably connected to the movable pliers head 21, and a receiving groove 211 for accommodating the spring sheet 8 is provided at the front end of the movable pliers head 21. A clamping groove is provided at the bottom of the accommodating groove 211 near the connecting pipe 2. The spring sheet 8 is fixedly connected to a clamping piece 81 near one end of the clamping groove. The clamping piece 81 is upwardly tilted near one end of the clamping groove and can be clamped into the clamping groove.

[0060] Embodiment 2: A tool for removing the spring piece 8. Refer to the appendix Figure 8 , the tool for removing the spring piece 8 is used to remove the spring piece 8 from the movable jaw 21; the tool includes a main body part 91 and a pressing part 92. The pressing part 92 is an elastic pressing part 92. The pressing part 92 is located at the top of the main body part 91. A pressing head 93 is fixedly connected to the side of the pressing part 92 close to the main body part 91. When disassembling, put the tool on the spring piece 8, then align the pressing head 93 with the clamping piece 81 of the spring piece 8, and then press down the pressing part 92. Push the clamping piece 81 to move downward through the pressing head 93 to push the clamping piece 81 out of the clamping groove, and then pull the tool sleeve and drive the spring piece 8 to disengage from the movable jaw 21.

[0061] Embodiment 3: A tool for installing the spring piece 8. Refer to the appendix Figure 9 , which is used to install the spring piece 8 on the movable jaw 21. A preset groove 94 for accommodating the spring piece 8 is provided on the tool. When the spring piece 8 is inserted into the preset groove 94, the clamping piece 81 is located outside the preset groove 94. During installation, push the spring piece 8 through the tool and insert it onto the movable jaw 21 until the clamping piece 81 snaps into the clamping groove to complete the installation, and then pull out the tool.

[0062] Embodiment 4: A tool for removing the needle. Refer to the appendix Figure 10 , which is used to remove the suture needle 63 from the snap needle 62; a clamping groove 95 for clamping the head of the suture needle 63 is provided on the tool. When disassembling, put the tool outside the jaw, then press the wrench 3 until the head of the suture needle 63 pierces out and enters the clamping groove 95, and then press down the pressing block 73 to push the needle sleeve 71 to rotate downward and drive, thereby driving the suture needle 63 to disengage from the snap needle 62, and then pull the tool outward to pull out the suture needle 63 to complete the disassembly of the suture needle 63.

[0063] Embodiment 5: A tool for installing the needle. Refer to the appendix Figure 11 , which is used to pass the suture needle 63 through the needle sleeve 71 and install it on the snap needle 62; a clamping part 96 capable of clamping the suture is provided on the tool. When installing the needle, first press the wrench 3 to move the snap needle 62 outward to the farthest position, and then push the suture needle 63 through the tool and insert it into the needle sleeve 71 until the connecting block 621 on the snap needle 62 snaps into the connecting groove 631 of the suture needle 63 to complete the installation of the suture needle 63.

[0064] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A secondary pressing type suture gun, characterized in that: Including a housing (1); A connecting pipe (2), the connecting pipe (2) is fixedly connected to the front end of the housing (1), the front end of the connecting pipe (2) is provided with a fixed jaw (22) and a movable jaw (21) that form a pair of pliers, and a suture needle (63) that can pass through the fixed jaw (22) and the movable jaw (21); A wrench (3), the wrench (3) is rotatably connected to the housing (1), the wrench (3) is composed of an outer wrench (31) and an inner wrench (32), the outer wrench (31) is located outside the housing (1), the inner wrench (32) is located inside the housing (1), and the connection between the outer wrench (31) and the inner wrench (32) is rotatably connected to the housing (1); A trigger (4), one end of the trigger (4) is rotatably connected to the wrench (3), and the other end extends into the housing (1), and a clamping groove (411) is provided on the trigger (4); A clamping block (412), the clamping block (412) is fixedly connected inside the housing (1) and fits against one side of the trigger (4) provided with the clamping groove (411); A clamping control member (5), the clamping control member (5) is rotatably connected inside the housing (1), a connecting pin (321) for driving the clamping control member (5) to rotate is provided on the inner wrench (32), and the clamping control member (5) is used to drive the movable jaw (21) to clamp on the fixed jaw (22); And a needle pushing rod (6), the needle pushing rod (6) is rotatably connected inside the housing (1) and is used to drive the suture needle (63) to perform a suturing action, the needle pushing rod (6) is connected to the inner wrench (32) through a connecting rod (61), and both ends of the connecting rod (61) are rotatably connected to the needle pushing rod (6) and the inner wrench (32) respectively; When the clamping groove (411) is located outside the housing (1), the outer wrench (31) is pressed, the clamping control member (5) rotates with the inner wrench (32), until the clamping block (412) is clamped in the clamping groove (411), the fixed jaw (22) and the movable jaw (21) are clamped, when the trigger (4) is toggled to make the outer wrench (31) continue to be pressed and push the clamping groove (411) partially into the housing (1), the clamping control member (5) stops swinging and the needle pushing rod (6) rotates with the inner wrench (32) under the action of the connecting rod (61) to push the suture needle (63) out; The connection between the outer wrench (31) and the inner wrench (32) is located on the side of the needle pushing rod (6) close to the suture needle (63), and the connecting rod (61) is located between the needle pushing rod (6) and the connection between the outer wrench (31) and the inner wrench (32); Taking the rotation axis of the wrench (3) as the center of the circle, a first circle (33) is formed with the distance from the connection point of the connecting rod (61) and the inner wrench (32) to the semi-axis rotation axis as the radius, taking the rotation axis of the connecting rod (61) on the needle pushing rod (6) in the initial state when the wrench (3) is not pressed as the center of the circle, and the distance between the connection point of the connecting rod (61) on the needle pushing rod (6) and the connection point of the connecting rod (61) on the inner wrench as the radius to form a second circle (34), the first circle (33) and the second circle (34) have two intersection points, namely the lower intersection point (35) and the upper intersection point (36); In the initial state when the wrench (3) is not pressed, the connection point of the connecting rod (61) and the inner wrench (32) is at the lower intersection point (35). When the wrench (3) is pressed until the locking block (412) is engaged in the card slot (411), the connection point of the connecting rod (61) and the inner wrench (32) is at the upper intersection point (36).

2. The secondary pressing type suture gun according to claim 1, wherein: One end at the top of the push needle rod (6) is rotatably connected with a snap needle (62). The snap needle (62) is connected with the suture needle (63). When one end at the top of the push needle rod (6) swings towards the side close to the snap needle (62), the suture needle (63) is pushed outwards.

3. The secondary pressing type suture gun according to claim 1, characterized in that: One end of a pull rod is hinged to the top of the clamping control member (5), and the other end of the pull rod is connected with the movable jaw (21). When the clamping control member (5) drives the pull rod to slide away from the movable jaw (21), the pull rod drives the movable jaw (21) to clamp on the fixed jaw (22).

4. The secondary pressing type suture gun according to claim 3, wherein: A control slot is arranged on the clamping control member (5). The connecting pin (321) is located in the control slot. The slot wall on the side of the control slot away from the movable jaw (21) is set as the control slot wall and is in contact with the connecting pin (321). The control slot is set as a flat section (51) and an arc section (52) located at the top of the flat section (51). In the initial state when the wrench (3) is not pressed, the connecting pin (321) contacts the position close to the bottom of the flat section (51). When the locking block (412) is engaged in the card slot (411), the connecting pin (321) contacts the connection part of the flat section (51) and the arc section (52), and at this time, the arc section (52) coincides with the rotation arc of the connecting pin (321).

5. A secondary pressing type suture gun according to claim 1, characterized in that: The trigger (4) includes an extension section (41). The card slot (411) is arranged on the extension section (41), and one end of the extension section (41) away from the outer wrench (31) extends into the housing (1). And a connecting section (42). The connecting section (42) is hinged to the outer wrench (31) and extends downward below the outer wrench (31). An unlocking spring (421) is arranged between the connecting section (42) and the outer wrench (31). The unlocking spring (421) is located above the hinge point of the connecting section (42) and the outer wrench (31), and the unlocking spring (421) is in a compressed state to press the extension section (41) against the locking block (412).

6. The secondary pressing type suture gun according to claim 1, characterized in that: It further includes a return spring (11). One end of the return spring (11) is connected with the inner wrench (32), and the other end is fixedly connected to a return pin in the housing (1).

7. The secondary pressing type suture gun according to claim 2, wherein: A needle sleeve (71) rotatably connected in the connecting pipe (2) is arranged in the connecting pipe (2). The suture needle (63) passes through the needle sleeve (71) and is connected with the snap needle (62). A connecting groove (631) is arranged at the top of one end of the suture needle (63) connected with the snap needle (62). A connecting block (621) is arranged at the bottom of one end of the snap needle (62) connected with the suture needle (63). The connecting block (621) can be engaged in the connecting groove (631). One end of the needle sleeve (71) is rotatably connected to the connecting pipe (2), and an elastic member (72) is provided at the bottom of the other end. When the elastic member (72) is in a normal state, the connecting block (621) is snapped into the connecting groove (631).

8. A secondary pressing type suture gun according to claim 7, characterized in that: It further includes a pressing block (73). The pressing block (73) is rotatably connected to the housing (1). The pressing block (73) is located above the needle sleeve (71). The bottom of the pressing block (73) contacts the top of the needle sleeve (71), and the top of the pressing block (73) extends upward out of the housing (1).

9. The secondary pressing type suture gun according to claim 1, wherein: A spring piece (8) is detachably connected to the movable jaw (21). A receiving groove (211) for receiving the spring piece (8) is provided at the front end of the movable jaw (21). A clamping groove is provided at the bottom of the receiving groove (211) on the side close to the connecting pipe (2). A clamping piece (81) is fixedly connected to one end of the spring piece (8) close to the clamping groove. One end of the clamping piece (81) close to the clamping groove is tilted upward and can be snapped into the clamping groove.

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