Surgical puncture guide

Abstract

The application discloses a surgical puncture guide device, which comprises a shell, a push rod, a puncture needle connected to the front end of the push rod, an operating part and a locking part installed on the shell. The push rod is provided with a limiting part protruding from the side surface of the push rod. The operating part is used for pushing the push rod to move forward so that the push rod pushes the puncture needle forward. The locking part is installed on the shell and can rotate relative to the shell between a locking position and an unlocking position. The locking part is provided with a clamping part and a avoiding part. The clamping part and the avoiding part are staggered in a plane perpendicular to the rotation axis of the locking part. The clamping part can be placed on the front side of the limiting part to limit the forward movement of the limiting part when the locking part is in the locking position. The avoiding part can be placed on the front side of the limiting part to avoid the limiting part when the locking part is in the unlocking position. The application can effectively prevent the puncture needle from being accidentally ejected due to accidental touch, avoid the patient from being accidentally injured and improve the safety of the surgical puncture guide device.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a surgical puncture guide. Background Technology

[0002] During surgery, when suturing ligaments deep within cavities, the surrounding tissue is typically separated using the tip of a puncture guide. The trigger of the puncture guide is then operated, allowing the puncture needle to pass through the ligament tissue. As the needle passes through the ligament, the suture attached to it is pulled along with it, enabling the ligament to be sutured. Generally, the puncture guide has a trigger and a push rod. The puncture needle is mounted at the tip of the push rod. Operating the trigger pushes the push rod forward, allowing the needle to pass through the ligament. However, if the trigger is accidentally activated during the procedure, the needle may be ejected from the puncture guide, potentially causing injury to the patient and posing a safety hazard. Summary of the Invention

[0003] The main objective of this application is to propose a surgical puncture guide with high safety.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] The surgical puncture guide includes a housing, a push rod installed inside the housing and extending from the front end of the housing, a puncture needle connected to the front end of the push rod, an operating part provided on the housing, and a locking member installed on the housing; the push rod is provided with a limiting part protruding from the side of the push rod, and the operating part is used to push the push rod forward so that the push rod pushes the puncture needle forward;

[0006] The locking member is mounted on the housing and can rotate relative to the housing between a locked position and an unlocked position. The locking member is provided with a locking part and a clearance part. The locking part and the clearance part are offset from each other in a plane perpendicular to the rotation axis of the locking member, so that the locking part can be placed in front of the limiting part when the locking member is in the locked position to limit the forward movement of the limiting part, and the clearance part can be placed in front of the limiting part when the locking member is in the unlocked position to avoid the limiting part.

[0007] Preferably, the locking component includes a locking sleeve sleeved on the outside of the push rod and rotatably connected to the housing. The locking sleeve is provided with a limiting end wall. The limiting part is a limiting pin extending radially along the push rod. The limiting pin is located on the rear side of the limiting end wall. The clearance part is a clearance groove provided on the inner surface of the locking sleeve. The clearance groove extends forward from the limiting end wall so that the limiting pin can move forward through the clearance groove. The part of the limiting end wall without the clearance groove forms a locking part.

[0008] Preferably, the lock sleeve is provided with two opposing through grooves, which extend from the inner surface of the lock sleeve to the outer surface. The two ends of the limiting pin protrude from the two sides of the push rod and are placed in the two through grooves. The front wall of the through groove forms the limiting end wall. The two sides of the through groove are offset by 60 to 120° in the circumferential direction of the lock sleeve.

[0009] Preferably, the locking element further includes a knob fixedly sleeved on the outside of the lock sleeve to drive the lock sleeve to rotate. The knob covers the outside of the through groove, and the outside of the knob is provided with an outwardly protruding flange for easy operation.

[0010] Preferably, a spring is sleeved on the push rod, with the front end of the spring abutting against the outer shell and the rear end abutting against the limiting pin. The spring is used to provide an elastic stress that pushes the limiting pin backward so that the limiting pin is pressed against the rear end wall of the through groove.

[0011] Preferably, the locking component further includes a limiting ring fixed inside the housing. The limiting ring is sleeved on the front end of the lock sleeve. The inner edge of the limiting ring is provided with two limiting protrusions, and the outer edge of the lock sleeve is provided with a limiting groove. The two limiting protrusions are respectively engaged in the limiting groove when the locking component is in the locked position and the unlocked position.

[0012] Preferably, the outer shell includes a housing, a fixed cylinder fixed to the housing and extending outward from the front end of the housing, and a guide sleeve fixedly connected to the front end of the fixed cylinder. The push rod includes a movable rod passing through the housing, an extension rod fixed to the front end of the movable rod and movably passing through the fixed cylinder, and a flexible steel wire fixed to the front end of the extension rod and movably passing through the guide sleeve. The puncture needle is connected to the front end of the flexible steel wire.

[0013] Preferably, the front end of the guide sleeve forms a bend, and the portion between the two ends of the bend forms a receiving space with an opening at the bottom for accommodating the tissue to be sutured. A protective cap is installed at the rear end of the bend, and the protective cap is provided with a guide hole that connects the receiving space with the inner cavity of the guide sleeve for the puncture needle to pass through.

[0014] Preferably, a connector is fixedly connected to the front end of the flexible steel wire, and the puncture needle is clamped on the connector; the front end of the elbow is provided with a snap-fit ​​hole that is directly opposite the guide hole and has spatial communication with it, and the inner wall of the snap-fit ​​hole is used to clamp the puncture needle when it is inserted into the snap-fit ​​hole so that the puncture needle can be separated from the connector when the connector moves backward.

[0015] Preferably, the outer casing is provided with a suture clamping assembly, which includes a mounting base and two elastic clamping blocks. The two elastic clamping blocks are arranged opposite each other to form a suture clamping groove between them. After the suture is passed through the puncture needle, it is placed in the suture clamping groove and clamped by the two elastic clamping blocks.

[0016] Compared to existing technologies, this application allows the locking member to rotate between a locked position and an unlocked position. In the locked position, the locking member limits the push rod, effectively preventing accidental contact that could cause the puncture needle to be accidentally ejected, thus avoiding accidental injury to the patient and improving the safety of the surgical puncture guide. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 This is a cross-sectional view of this application;

[0020] Figure 3 for Figure 2 Schematic diagram of the middle push rod;

[0021] Figure 4 for Figure 2 A structural schematic diagram of the locking component is provided, illustrating one usage state of this application;

[0022] Figure 5 This is a schematic diagram illustrating another usage configuration of this application;

[0023] Figure 6 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 7 for Figure 1 A schematic diagram of the structure of the middle clamping wire assembly.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0029] like Figure 1 , 2As shown in Figures 3, 4, 5, 6, and 7, this application discloses a surgical puncture guide, particularly a surgical puncture guide for human ligament tissue (such as the sacrospinous ligament). It includes a housing 100, a push rod 30, a puncture needle 50, a trigger 20, and a locking element 40. The push rod 30 is installed inside the housing 100 and protrudes forward from the front end of the housing 100. The puncture needle 50 is mounted on the front end of the push rod 30. An operating part is mounted on the housing 100 and is used for... Push the lever 30 forward to allow the puncture needle 50 to pass through the patient's ligament tissue. Use the puncture needle 50 to pass the suture attached to it through the ligament tissue. The operating part can be the trigger 20 mounted on the housing 100. A hand part 101 is provided on the housing 100. During operation, hold the hand part 101 and pull the trigger 20 backward. The trigger 20 rotates relative to the housing 100. Use the trigger 20 to pull the lever 30 forward, and then use the lever 30 to push the puncture needle 50 forward.A limiting part protruding from the side of the push rod 30 is provided on the push rod 30. The locking member 40 is installed on the housing 100 to cooperate with the limiting part to lock the push rod 30. Specifically, the locking member 40 is installed on the housing 100 and can rotate relative to the housing 100 between a locked position and an unlocked position. When operation is required, the locking member 40 is rotated or moved to the unlocked position. At this time, pulling the trigger 20 will push the push rod 30 forward. When the locking member 40 is rotated or moved to the locked position, pulling the trigger 20 will lock the push rod 30. 0 will prevent the limiting portion on the push rod 30 from moving forward; in some specific embodiments, the push rod 30 includes a movable rod 31, which passes through the interior of the housing 100 and has a degree of freedom of movement relative to the housing 100 in the front-rear direction. The limiting portion is a limiting pin 312 provided on the movable rod 31, which extends radially along the movable rod 31 and its end protrudes from the side of the movable rod 31. The locking member 40 includes a locking sleeve 41, which is sleeved on the movable rod. The locking sleeve 41 is externally and rotatably connected to the outer casing 100. Rotation of the locking sleeve 41 relative to the outer casing 100 allows it to rotate relative to the movable rod 31. The locking sleeve 41 is specifically located at the rear of the outer casing 100. A limiting end wall is provided on the locking sleeve 41, and a limiting pin 312 on the movable rod 31 is located behind the limiting end wall. An avoidance groove 413 is provided on the inner surface of the locking sleeve 41, extending forward from the limiting end wall. The portion of the limiting end wall without the avoidance groove 413 forms a locking portion. Operation of the locking member 40 causes the locking sleeve 41 to rotate relative to the movable rod 31. When the lever 31 rotates, the limiting pin 312 on the locking sleeve 41 is aligned with the clearance groove 413. At this time, when the trigger 20 is pulled, the lever 31 moves forward, and the limiting pin 312 can move forward through the clearance groove 413, that is, the locking member 40 is in the unlocked position. When the locking member 40 is rotated, the locking sleeve 41 rotates to a position that is offset from the clearance groove 413, so that the limiting pin 312 is aligned with the locking part on the limiting end wall. When the trigger 20 is pulled, the limiting pin 312 is blocked by the locking part, so that the limiting pin 312 cannot move forward, that is, the lever 31 cannot move forward.

[0030] To achieve a better locking effect, two opposing through slots 411 are provided on the lock sleeve 41. The through slots 411 extend from the inner surface of the lock sleeve 41 to the outer surface. The two ends of the limiting pin 312 protrude from both sides of the movable rod 31, and the portions of the limiting pin 312 protruding from both sides of the movable rod 31 are respectively placed in the two through slots 411. The front end wall 412 of the through slot 411 forms the aforementioned limiting end wall. When the lock sleeve 41 is rotated, the limiting pin 312 can only swing relative to the lock sleeve 41 between the side 415 and side 416 of the through slot 411. That is, by using the cooperation of the through slot 411 and the limiting pin 312 to achieve the angle of rotation of the lock sleeve 41 relative to the movable rod 31, the side 415 and side 416 can be set to be offset by 90° in the circumferential direction of the lock sleeve 41, so that the lock sleeve 41 can rotate within a 90° angle range. Figure 4 When the limiting pin 312 is abutting the side 415, the limiting pin 312 is directly opposite the locking part (i.e., the position on the front wall 412 where the relief groove 413 is not provided). At this time, the locking member 40 is in the locked position. See [link to relevant documentation]. Figure 5 The locking sleeve 41 is rotated 90° clockwise, causing the side 416 to abut against the limiting pin 312. At this time, the limiting pin 312 is directly opposite the clearance groove 413, and the locking member 40 is in the unlocked position. Of course, in other embodiments, the angle between the side 415 and the side 416 on the circumference of the locking sleeve 41 can also be other values ​​within the range of 60° to 120°. The protruding parts on both sides of the limiting pin 312 cooperate with the two through grooves 411 respectively, so that the locking sleeve 41 can more stably limit the movable rod 31. It should be noted that, with the two through grooves 411, the front end wall 412 of the two through grooves 411 respectively forms a limiting end wall. Two above-mentioned clearance grooves 413 need to be provided on the inner surface of the locking sleeve 41. The two clearance grooves 413 are used to allow the two ends of the limiting pin 312 to slide in, so that the limiting pin 312 can move forward along the axial direction of the locking sleeve 41. When the limiting pin 312 slides in the clearance grooves 413, the clearance grooves 413 and the limiting pin 312 can also be used to guide the movable rod 31, improving the stability of the movable rod 31 when the trigger 20 is pulled. The locking component 40 also includes a knob 42, which is sleeved on the outside of the lock sleeve 41 and fixedly engaged with the lock sleeve. It pivotally engages with the outer casing 100 to drive the locking component 40 to rotate. The knob 42 covers the outside of the through groove 411. An outwardly protruding flange 421 is also provided on the outer side of the knob 42. When the knob 42 is rotated, the flange 421 plays a role in preventing slippage, so as to facilitate the rotation of the knob 42.

[0031] To ensure proper positioning of the lock sleeve 41 in both the locked and unlocked positions, the locking member 40 further includes a limiting ring 43 fixed within the housing 100. This limiting ring 43 is sleeved around the front end of the lock sleeve 41. Two limiting protrusions 431 are provided on the inner edge of the limiting ring 43, and the two limiting protrusions 431 are offset 90° axially from each other on the limiting ring 43. Two limiting grooves 419 are provided on the outer edge of the lock sleeve 41. When the locking member 40 is in the locked position, one of the limiting protrusions 431 is engaged in the limiting groove 419; when the locking member 40 is in the unlocked position, the other limiting protrusion... The locking sleeve 431 is engaged in the limiting slot 419. The locking sleeve 41 and the limiting ring 43 can be made of plastic. In particular, when the limiting ring 43 is made of plastic or other deformable materials, it can deform under pressure. The limiting protrusion 431 is engaged in the limiting slot 419 to limit the rotation of the locking member 40. When the locking member 40 is not subjected to external force, it can effectively prevent the locking member 40 from rotating. When an external force is applied to the locking member 40, the locking sleeve 41 squeezes the limiting protrusion 431, causing the limiting ring 43 to deform to a certain extent, so that the locking member 40 can rotate relative to the outer shell 100. In other embodiments, a limiting protrusion 431 may be provided on the inner edge of the limiting ring 43, and two limiting slots 419 may be provided on the outer edge of the locking sleeve 41. The two limiting slots 419 are offset by 90° in the circumferential direction from the locking member 40. When the locking member 40 is in the locked position, the limiting protrusion 431 is engaged in one of the limiting slots 419, and when the locking member 40 is in the unlocked position, the limiting protrusion 431 is engaged in the other limiting slot 419. In other embodiments, a limiting protrusion may be provided on the outer edge of the locking sleeve 41, and a limiting slot may be provided on the inner edge of the limiting ring 43.

[0032] In a preferred embodiment, a spring 60 is also fitted on the movable rod 31. The front end of the spring 60 abuts against the outer shell 100 and the rear end abuts against the limiting pin 312. The spring 60 provides an elastic stress that always pushes the limiting pin 312 backward, so that the limiting pin 312 is always pressed against the rear end wall 414 of the through groove 411. After the external force on the trigger 20 is released, the elastic stress provided by the spring 60 causes the movable rod 31 to return to its original position. By using the cooperation between the limiting pin 312 and the rear end wall 414 of the through groove 411, the maximum displacement of the movable rod 31 backward can be limited, so as to avoid the movable rod 31 from displacing too much when returning to its original position.

[0033] In other embodiments of this application, the locking part and the avoidance groove provided on the locking member can be locking parts and avoidance parts with other structural forms. The locking part and the avoidance part are offset from each other in a plane perpendicular to the rotation axis of the locking member. When the locking member 40 is in the locked position, the locking part is located in front of the limiting pin 312 to block the limiting pin 312. When the locking member 40 is in the unlocked position, the avoidance part is located in front of the limiting pin 312 to avoid the limiting pin 312. Of course, the limiting pin 312, as a component that cooperates with the locking part and the avoidance part, is not necessarily a limiting pin. It can also be other structures that protrude from the side of the movable rod 31.

[0034] In order to ensure that the distance between the operator's hand and the tissue to be operated on during the operation of the surgical puncture guide is relatively large, the outer shell 100 of this invention includes a shell 10, a fixed cylinder 11 fixed to the shell 10 and extending outward from the front end of the shell 10, and a guide sleeve 12 fixedly connected to the front end of the fixed cylinder 11. Corresponding to the above structure of the outer shell 100, the push rod 30 includes not only the aforementioned movable rod 31, but also an extension rod 32 fixed to the front end of the movable rod 31 and movably inserted into the fixed cylinder 11, and a flexible steel wire 33 fixed to the front end of the extension rod 32 and movably inserted into the guide sleeve 12. The puncture needle 50 is connected to the front end of the flexible steel wire 33. The extension rod 32 is guided by the fixed cylinder 11, and the flexible steel wire 33 is guided by the guide sleeve 12. When the trigger 20 is pulled, the push rod 30 composed of the movable rod 31, the extension rod 32, and the flexible steel wire 33 can move forward relatively smoothly.

[0035] See Figure 6The front end of the guide sleeve 12 forms a bend 13, and the portion between the two ends of the bend 13 forms a receiving space with an opening at the bottom. When the front end of the guide sleeve 12 extends above the ligament tissue, the ligament tissue can be placed downward into the receiving space formed by the bend 13. A protective cover 131 is installed at the rear end of the bend 13. A guide hole 133 is provided on the protective cover 131 to connect the receiving space with the inner cavity of the guide sleeve 12. The puncture needle 50 can enter the receiving space from the guide sleeve 12 through the guide hole 133. Then, after the trigger 20 is pulled, the puncture needle 50, pushed by the flexible steel wire 33, can pass through the ligament tissue located in the receiving space after passing through the guide hole 133, so that the suture thread attached to the puncture needle 50 can pass through the ligament tissue. Furthermore, a connector 34 is fixedly connected to the front end of the flexible steel wire 33, and the puncture needle 50 is secured to the connector 34. A locking hole 134 is provided on the front end 132 of the elbow 13, directly opposite the guide hole 133. The locking hole 134 communicates with the receiving space, and the inner wall of the locking hole 134 can be used to clamp the puncture needle 50. Specifically, when suturing the ligament, the puncture needle is located in the guide sleeve 12. After pulling the trigger 20, the puncture needle 50 moves forward through the receiving space. The ligament tissue in the space then penetrates into the locking hole 134. Utilizing the inertia of the forward impact of the puncture needle 50, the inner wall of the locking hole 134 can clamp the puncture needle 50 after it enters the locking hole 134. Moreover, the clamping force between the inner wall of the locking hole 134 and the puncture needle 50 is greater than the clamping force between the puncture needle 50 and the connector 34. After the flexible steel wire 33 is reset, the puncture needle 50 disengages from the connector 34 and remains in the locking hole 134.

[0036] In the above embodiment, the push rod 30 consists of a movable rod 31, an extension rod 32, and a flexible steel wire 33. That is, the front end of the push rod 30 is set as a flexible structure, which, together with the guide sleeve 12, reduces damage to surrounding tissues during ligament suturing. In fact, in other embodiments, the push rod 30 can also be a single piece, and similarly, the housing 10, the fixing cylinder 11, and the guide sleeve 12 can also be a single integral structure.

[0037] See Figure 7As shown, a suture clamping assembly 70 is provided on the outer casing 100. The suture clamping assembly 70 includes a mounting base 71 and two elastic clamping blocks 72. The two elastic clamping blocks 72 are arranged opposite to each other, and a suture clamping groove 73 is formed between the two elastic clamping blocks 72. The suture can be clamped through the suture clamping groove 73. Specifically, after the suture is passed through the puncture needle 50, the suture is pulled back and placed in the suture clamping groove 73, and the suture is clamped by the two elastic clamping blocks 72. The suture clamping assembly 70 can be positioned at the junction of the housing 10 and the fixed cylinder 11, so that the suture clamping assembly 70 is approximately located in the middle of the length direction of the puncture guide. During use, the suture is inserted into the suture clamping groove 73, and the suture is clamped by the deformation of the elastic clamp 72, so that the suture has a certain tension and does not prolapse. When the trigger is pulled to puncture the ligament, the puncture needle 50 drives the suture forward. Under the action of the forward pulling force of the puncture needle 50, the suture can be pulled from the suture clamping groove 73 to achieve puncture.

[0038] In use, the suture passes through the puncture needle 50, the suture is pulled straight to a certain length, the double-stranded suture is pulled back and clamped on the suture clamping assembly 70 to keep the suture taut, the locking member 40 is rotated to unlock the locking member 40, the handle 101 is held with one hand, and the fingers of the other hand are placed on the patient's ligament, the bend 13 is placed above the ligament, so that the part of the ligament to be sutured is placed in the receiving space formed by the bend 13, the trigger 20 is pulled, the puncture needle 50 moves forward and passes through the ligament and is locked in the locking hole 134, the trigger 20 is released, the spring 60 resets the push rod 30, the puncture needle 50 is disengaged from the connector 34, the bend 13 is removed from the ligament and pulled out of the patient's body, the suture is knotted outside the patient's body, and the ligament suture is completed.

[0039] Compared to existing technologies, this application allows the locking member to rotate between a locked position and an unlocked position. In the locked position, the locking member limits the push rod, effectively preventing accidental contact that could cause the puncture needle to be accidentally ejected, thus avoiding accidental injury to the patient and improving the safety of the surgical puncture guide.

[0040] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A surgical puncture guide, characterized in that, It includes a housing, a push rod installed inside the housing and extending from the front end of the housing, a puncture needle connected to the front end of the push rod, an operating part provided on the housing, and a locking member installed on the housing; the push rod is provided with a limiting part protruding from the side of the push rod, and the operating part is used to push the push rod forward so that the push rod pushes the puncture needle forward; The locking member is mounted on the housing and can rotate relative to the housing between a locked position and an unlocked position. The locking member is provided with a locking part and a clearance part. The locking part and the clearance part are offset from each other in a plane perpendicular to the rotation axis of the locking member, so that the locking part can be placed in front of the limiting part when the locking member is in the locked position to limit the forward movement of the limiting part, and the clearance part can be placed in front of the limiting part when the locking member is in the unlocked position to avoid the limiting part. The locking component includes a locking sleeve that is fitted over the outside of the push rod and rotatably connected to the housing. The locking sleeve is provided with a limiting end wall. The limiting part is a limiting pin that extends radially along the push rod. The limiting pin is located on the rear side of the limiting end wall. The clearance part is a clearance groove provided on the inner surface of the locking sleeve. The clearance groove extends forward from the limiting end wall so that the limiting pin can move forward through the clearance groove. The part of the limiting end wall without the clearance groove forms a locking part. The lock sleeve has two opposing through slots that extend from the inner surface to the outer surface of the lock sleeve. The two ends of the limiting pin protrude from the two sides of the push rod and are placed in the two through slots. The front wall of the through slot forms the limiting end wall. The two sides of the through slot are offset by 60~120° in the circumference of the lock sleeve.

2. The surgical puncture guide as described in claim 1, characterized in that, The locking component also includes a knob that is fixedly sleeved on the outside of the lock sleeve to drive the lock sleeve to rotate. The knob is sealed on the outside of the through groove, and the outside of the knob is provided with an outwardly protruding flange for easy operation.

3. The surgical puncture guide as described in claim 1, characterized in that, A spring is fitted on the push rod. The front end of the spring abuts against the outer shell and the rear end abuts against the limiting pin. The spring is used to provide an elastic stress that pushes the limiting pin backward so that the limiting pin is pressed against the rear end wall of the through groove.

4. The surgical puncture guide as described in claim 1, characterized in that, The locking component also includes a limiting ring fixed inside the housing. The limiting ring is sleeved on the front end of the lock sleeve. The inner edge of the limiting ring is provided with two limiting protrusions, and the outer edge of the lock sleeve is provided with a limiting groove. The two limiting protrusions are respectively engaged in the limiting groove when the locking component is in the locked position and the unlocked position.

5. The surgical puncture guide as described in claim 1, characterized in that, The outer casing includes a housing, a fixed cylinder fixed to the housing and extending outward from the front end of the housing, and a guide sleeve fixedly connected to the front end of the fixed cylinder. The push rod includes a movable rod passing through the housing, an extension rod fixed to the front end of the movable rod and movably passing through the fixed cylinder, and a flexible steel wire fixed to the front end of the extension rod and movably passing through the guide sleeve. The puncture needle is connected to the front end of the flexible steel wire.

6. The surgical puncture guide as described in claim 5, characterized in that, The front end of the guide sleeve forms a bend, and the portion between the two ends of the bend forms a receiving space with an opening at the bottom for accommodating the tissue to be sutured. A protective cap is installed at the rear end of the bend, and the protective cap is provided with a guide hole that connects the receiving space with the inner cavity of the guide sleeve for the puncture needle to pass through.

7. The surgical puncture guide as described in claim 6, characterized in that, The flexible steel wire is fixedly connected to a connector at its front end, and the puncture needle is clamped on the connector. The front end of the elbow is provided with a snap-fit ​​hole that is directly opposite the guide hole and communicates with the receiving space. The inner wall of the snap-fit ​​hole is used to clamp the puncture needle when it is inserted into the snap-fit ​​hole so that the puncture needle can be separated from the connector when the connector moves backward.

8. The surgical puncture guide as described in claim 1, characterized in that, The outer casing is provided with a suture clamping assembly, which includes a mounting base and two elastic clamping blocks. The two elastic clamping blocks are arranged opposite each other to form a suture clamping groove between them. After the suture is inserted through the puncture needle, it is placed in the suture clamping groove and clamped by the two elastic clamping blocks.

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