Channel opener and its connecting mechanism

Abstract

The present invention discloses a channel opener and its connection mechanism, the connection mechanism includes a first connection member, the first connection member is provided with a clamping groove and a spring sheet structure, one side of the spring sheet structure is provided with a first adjustment groove arranged through the inner side wall of the clamping groove, and the spring sheet structure is also provided with through holes passing through its two ends; a second connection member, the second connection member is installed on the first connection member, and the second connection member is provided with a groove; an adjustment block, the adjustment block is arranged in the groove, and the adjustment block is provided with a matching groove that cooperates with the groove to form a slide hole; and a fastening assembly, the fastening assembly includes a fastener and a locking nut, one end of the fastener is connected to the adjustment block, and the other end passes through the through hole and is threadedly connected to the locking nut. The connection mechanism can realize the fixing of the opening distance at any opening distance; the channel opener adopts the above-mentioned connection mechanism, so that the appropriate opening distance can be obtained during the operation, the soft tissue will not be squeezed, and it is conducive to postoperative recovery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a channel opener and a connecting mechanism thereof. Background Art

[0002] Fusion is a common surgical method for treating spinal diseases such as lumbar spinal stenosis and herniated disc. In recent years, with the improvement of medical standards, minimally invasive technology has gradually been applied to fusion. Minimally invasive surgery can complete the operation by opening a smaller incision in the patient's body, so it has the advantages of less damage to tissues and is conducive to recovery and healing.

[0003] Currently, the main methods used to open surgical channels in fusion surgery are multi-stage sleeves and channel expanders. Among them, the multi-stage sleeve can provide a field of view of 2-3 cm, but there will be blind spots during the operation, which is not conducive to surgical operations; and the channel expander expands the soft tissue around the affected area to expose the affected area. During the operation, the traditional expander is complicated to operate and cannot stop at any expansion distance, resulting in a small expansion distance and insufficient surgical field of view; and if the expansion distance is too large, it will squeeze the soft tissue, which is not conducive to postoperative recovery. Summary of the invention

[0004] Based on this, it is necessary to provide a channel opener and a connecting mechanism thereof, which can fix the opening distance at any opening distance; the channel opener adopts the above-mentioned connecting mechanism, so that a suitable opening distance can be obtained during the operation, ensuring a suitable surgical field of view, and will not squeeze the soft tissue, which is conducive to postoperative recovery.

[0005] The technical solution is as follows:

[0006] On the one hand, the present application provides a connecting mechanism, including a first connecting member, the first connecting member is provided with a clamping groove and a spring structure, one side of the spring structure is provided with a first adjustment groove arranged through the inner wall of the clamping groove, the first adjustment groove is used to change the clamping size of the clamping groove, and the spring structure is also provided with through holes passing through both ends thereof; a second connecting member, the second connecting member is arranged on the first connecting member, the second connecting member is provided with a groove, and the center line of the groove is arranged at an angle to the center line of the clamping groove; an adjusting block, the adjusting block is arranged in the groove, and the adjusting block is provided with a matching groove that cooperates with the groove to form a slide hole; and a fastening assembly, the fastening assembly includes a fastener and a locking nut, one end of the fastener is connected to the adjusting block, and the other end passes through the through hole and is threadedly connected to the locking nut, for changing the closing size of the first adjusting groove.

[0007] When the above-mentioned connection mechanism is used, the connection mechanism can be slidably installed on the mounting member through the sliding slot hole, the opening member is installed on the force-applying member, and the force-applying member is installed on the first connection through the clamping groove; at this time, when it is necessary to move the opening member, it is only necessary to loosen the fastener so that the force-applying member can move relative to the clamping groove, so that the force-applying member can be pulled or pushed, so that when the opening member moves to a preset position, the fastener can be locked at this time to close the first adjustment groove, thereby reducing the clamping opening of the clamping groove, and the force-applying member can be fastened to the first connection member. The setting of the connection mechanism allows the opening member to move on the mounting member with the second connection member, and is convenient for installing the force-applying member, and is easy to control the movement of the force-applying member and fix it at any time.

[0008] The technical solution is further described below:

[0009] In one embodiment, when the fastener is loosened, the second connecting member can rotate relative to the adjusting block; when the fastener is locked, the second connecting member is fixed to the mounting member. Thus, when the fastener is loosened, the second connecting member can rotate relative to the mounting member, thereby allowing the expansion member on the mounting member connection mechanism to rotate relative to the mounting member.

[0010] In one of the embodiments, the inner side wall of the groove is a cylindrical structure, and the outer side wall of the adjustment block is matched with the inner side wall of the groove, so that the second connecting member can rotate relative to the adjustment block.

[0011] In one embodiment, the second connecting member is fixedly connected to the first connecting member, an outer side wall of the adjusting block is provided with an arc groove, one end of the fastener is clamped in the arc groove and can move along the trajectory of the arc groove, so that the fastener can drive the second connecting member to rotate.

[0012] In one embodiment, a connecting body is provided at one end of the fastener, the connecting body is arranged in the groove, and the second connecting member is provided with a connecting groove that cooperates with the connecting body in a limiting manner, so that the second connecting member is installed on the first connecting member.

[0013] In one of the embodiments, the inner side surface of the connecting body is matched with the outer side wall of the adjusting block, and the connecting body is provided with a clamping portion matched with the arc groove.

[0014] In one of the embodiments, a second adjustment groove is further provided on one side of the spring structure, and the second adjustment groove and the first adjustment groove are spaced apart from each other along the axial direction of the through hole.

[0015] On the other hand, the present application also provides a channel opener, including the above-mentioned connecting mechanism, the connecting mechanism includes two, and also includes: an annular mounting member, the connecting mechanism can be slidably installed on the mounting member through the slide slot hole; and an opening component, the opening component includes a first force-applying member, a first opening member fixed on the first force-applying member, a second force-applying member, and a second opening member fixed on the second force-applying member, the first force-applying member is arranged on a corresponding one of the connecting mechanisms through the clamping groove and can be moved relative to the corresponding connecting mechanism, the second force-applying member is arranged on a corresponding other connecting mechanism through the clamping groove and can be moved relative to the corresponding connecting mechanism.

[0016] When the channel opener is in use, the connecting mechanism can be slidably installed on the mounting member through the slide slot hole, and the opening assembly is installed on the mounting member through the connecting mechanism. Specifically, during surgery, when it is necessary to move the first opening member, it is only necessary to loosen the corresponding fastener so that the first force-applying member can move relative to the clamping groove, so that the first force-applying member can be pulled or pushed, so that when the first opening member moves to a preset position, the locking nut can be rotated to lock the fastener, so that the first adjustment groove is closed, and then the clamping opening of the clamping groove is reduced, and the first force-applying member can be fastened to the first connecting member; similarly, the second opening member can be moved and fixed at any time, so that the operator can obtain a suitable opening distance. The channel opener adopts the above-mentioned connecting mechanism, so that a suitable opening distance can be obtained during surgery, ensuring a suitable surgical field of view, and will not squeeze soft tissue, which is conducive to postoperative recovery.

[0017] The technical solution is further described below:

[0018] In one embodiment, the first spreading member is a sheet-like structure, and the first spreading member is provided with a plane body; the second spreading member is a sheet-like structure, and the second spreading member is provided with an arc-shaped avoidance portion, and the arc-shaped avoidance portion is arranged close to the second force-applying member and opposite to the plane body. The first spreading member is a sheet-like structure and is provided with a plane body, which can more conveniently pull the psoas major muscle and reduce nerve and blood vessel damage. At the same time, the second spreading member is also a sheet-like structure, which is used to pull the abdominal soft tissue; and by providing the arc-shaped avoidance portion, it is beneficial to obtain a larger surgical field of view, reduce the spreading distance, and further avoid squeezing the soft tissue.

[0019] In one embodiment, the plane body is provided with a mounting groove for installing a fixing pin. By providing the mounting groove, the expander can be directly fixed to the spine, solving the problem that the traditional channel expander needs to be fixed by a serpentine arm, so that the operator can perform the operation vertically without blocking the surgical field, which is conducive to the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a structural schematic diagram of a connecting mechanism in one embodiment;

[0021] Figure 2 for Figure 1 An exploded schematic diagram of the connection mechanism shown;

[0022] Figure 3 It is a schematic diagram of the structure of a channel opener in another embodiment;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure of the fixing component shown.

[0024] Description of reference numerals:

[0025] 10. Connecting mechanism, 100. First connecting member, 110. Clamping groove, 120. Spring sheet structure, 122. First adjusting groove, 124. Through hole, 126. Second adjusting groove, 200. Second connecting member, 210. Groove, 220. Connecting groove, 230. Card body, 300. Adjusting block, 310. Matching groove, 320. Arc groove, 400. Fastening assembly, 410. Fastener, 412. Connecting body, 420. Locking nut, 20. Mounting member, 30. Spreading assembly, 500. First force-applying member, 600. First spread-opening member, 610. Mounting groove, 620. Plane body, 700. Second force-applying member, 800. Second spread-opening member, 810. Arc-shaped avoidance portion, 40. Fixing assembly, 41. Fixing member, 42. Locking structure, 43. Toothed portion. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Further, when an element is considered to be "fixedly connected to" another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socketing, snap-on, one-piece fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, a connecting mechanism 10 is provided, including a first connecting member 100, the first connecting member 100 is provided with a clamping groove 110 and a spring structure 120, one side of the spring structure 120 is provided with a first adjustment groove 122 arranged through the inner side wall of the clamping groove 110, the first adjustment groove 122 is used to change the clamping size of the clamping groove 110, and the spring structure 120 is also provided with through holes 124 passing through both ends thereof; a second connecting member 200, the second connecting member 200 is installed on the first connecting member 100, and the second connecting member 200 is provided with a groove 21 0, and the center line of the groove 210 is set at an angle with the center line of the clamping groove 110; an adjusting block 300, the adjusting block 300 is set in the groove 210, and the adjusting block 300 is provided with a matching groove 310 that cooperates with the groove 210 to form a slide hole (not marked); and a fastening assembly 400, the fastening assembly 400 includes a fastener 410 and a locking nut 420, one end of the fastener 410 is connected to the adjusting block 300, and the other end passes through the through hole 124 and is threadedly connected to the locking nut 420, which is used to change the closing size of the first adjusting groove 122.

[0031] like Figures 1 to 3As shown, when the above-mentioned connection mechanism 10 is used, the connection mechanism 10 can be slidably installed on the mounting member 20 through the sliding slot hole, the opening member (such as the first opening member 600 or the second opening member 800) is installed on the force member (such as the first force member 500 or the second force member 700), and the force member is installed on the first connection through the clamping groove 110; at this time, when it is necessary to move the opening member, it is only necessary to loosen the fastener 410 so that the force member can move relative to the clamping groove 110, so that the force member can be pulled or pushed, so that when the opening member moves to the preset position, the fastener 410 can be locked at this time to close the first adjustment groove 122, thereby reducing the clamping opening of the clamping groove 110, and the force member can be fastened to the first connecting member 100. The setting of the connection mechanism 10 allows the opening member to move on the mounting member 20 with the second connecting member 200, and is convenient for installing the force member, and is easy to control the movement and fixation of the force member at any time.

[0032] It should be noted that the angle between the center line of the groove 210 and the center line of the clamping groove 110 can be designed according to actual needs. Specifically in this embodiment, the angle between the center line of the groove 210 and the center line of the clamping groove 110 is 90°. The other end of the fastener 410 is provided with a screw rod adapted to the internal thread structure of the locking nut 420.

[0033] like Figure 1 and Figure 2 As shown, based on the above embodiment, in one embodiment, when the fastener 410 is loosened, the second connecting member 200 can rotate relative to the adjustment block 300; when the fastener 410 is locked, the second connecting member 200 is fixed to the mounting member 20. In this way, when the fastener 410 is loosened, the second connecting member 200 can rotate relative to the mounting member 20, thereby making the expansion piece on the mounting member 20 connection mechanism 10 also rotate relative to the mounting member 20; at this time, the expansion piece has three degrees of freedom, and can slide freely (along the moving direction of the track of the mounting member 20 and along the axial direction of the force-applying member) and rotate (rotate around the mounting member 20), thereby opening the surgical field of view to the best position to facilitate surgical operation.

[0034] like Figure 2 As shown, further, in one embodiment, the inner side wall of the groove 210 is a cylindrical structure, and the outer side wall of the adjustment block 300 is adapted to the inner side wall of the groove 210, so that the second connecting member 200 can rotate relative to the adjustment block 300. In this way, the adjustment block 300 cooperates with the groove 210 of the second connecting member 200 to form a rotation track of the second connecting member 200, so that the angle adjustment of the spreader is more precise.

[0035] like Figure 1 and Figure 2As shown, further, in one embodiment, the second connecting member 200 is fixedly connected to the first connecting member 100, and the outer wall of the adjusting block 300 is provided with an arc groove 320, and one end of the fastener 410 is clamped in the arc groove 320 and can move along the track of the arc groove 320, so that the fastener 410 can drive the second connecting member 200 to rotate. In this way, by providing the arc groove 320, the rotation angle range of the second connecting member 200 can be limited, thereby controlling the rotation range of the expansion member relative to the mounting member 20; and when the fastener 410 is locked, one end of the fastener 410 is pressed and matched with the arc groove 320, so that the second connecting member 200 cannot rotate relative to the adjusting block 300.

[0036] like Figure 2 As shown, based on the above embodiment, in one embodiment, a connecting body 412 is provided at one end of the fastener 410, and the connecting body 412 is arranged in the groove 210, and the second connecting member 200 is provided with a connecting groove 220 that is limitedly matched with the connecting body 412. In this way, the second connecting member 200 is installed on the first connecting member 100 through the limited matching of the connecting body 412 and the groove 210; when the fastening screw is rotated and locked, the fastener 410 can drive the connecting body 412 to press against the second connecting member 200, and the second connecting member 200 is reliably locked on the first connecting member 100, so that the position of the expansion member will not move during the operation.

[0037] Furthermore, in one embodiment, the inner side surface of the connecting body 412 is matched with the outer side wall of the adjusting block 300, and the connecting body 412 is provided with a clamping portion (not shown) that matches the arc groove 320. Thus, when the fastening screw is rotated and locked, the fastener 410 can drive the clamping portion to tighten with the side wall of the arc groove 320, so that the second connecting member 200 is fixed to the adjusting block 300, and the adjusting block 300 is also lifted, so that the adjusting block 300 is fixed on the mounting member 20.

[0038] like Figure 1 and Figure 2 As shown, based on any of the above embodiments, in one embodiment, a second adjustment groove 126 is further provided on one side of the spring structure 120, and the second adjustment groove 126 and the first adjustment groove 122 are spaced apart along the axial direction of the through hole 124. By providing the second adjustment groove 126, the adjustment range of the clamping size of the clamping groove 110 is expanded, and it is convenient to form a pre-tightening force so that the locking nut 420 is not easy to loosen.

[0039] like Figure 2As shown, based on any of the above embodiments, in one embodiment, the second connector 200 is provided with two card bodies 230 spaced apart at two ends of the groove 210, and the first connector 100 is provided with a card slot that snaps with the two card bodies 230. In this way, the second connector 200 can be detachably fixed to the first connector by utilizing the card body 230 and the card slot.

[0040] like Figure 3 As shown, in another embodiment, a channel opener is provided, including the above-mentioned connecting mechanism 10, the connecting mechanism 10 includes two, and also includes: an annular mounting member 20, the connecting mechanism 10 can be slidably mounted on the mounting member 20 through a slide slot hole; and an opening component 30, the opening component 30 includes a first force-applying member 500, a first opening member 600 fixed on the first force-applying member 500, a second force-applying member 700, and a second opening member 800 fixed on the second force-applying member 700, the first force-applying member 500 is arranged on a corresponding one of the connecting mechanisms 10 through a clamping groove 110, and can be moved relative to the corresponding connecting mechanism 10, the second force-applying member 700 is arranged on a corresponding other connecting mechanism 10 through a clamping groove 110, and can be moved relative to the corresponding connecting mechanism 10.

[0041] like Figures 1 to 3 As shown, when the channel opener is used, the connecting mechanism 10 can be slidably installed on the mounting member 20 through the sliding slot hole, and the opening assembly 30 is installed on the mounting member 20 through the connecting mechanism 10. Specifically, during surgery, when it is necessary to move the first opening member 600, it is only necessary to loosen the corresponding fastener 410 so that the first force-applying member 500 can move relative to the clamping groove 110, so that the first force-applying member 500 can be pulled or pushed, so that when the first opening member 600 moves to a preset position, the locking nut 420 can be rotated to lock the fastener 410, so that the first adjustment groove 122 is closed, and then the clamping opening of the clamping groove 110 is reduced, and the first force-applying member 500 can be fastened to the first connecting member 100; similarly, the second opening member 800 can be moved and fixed at any time, so that the operator can obtain a suitable opening distance. The channel opener adopts the above-mentioned connecting mechanism 10, so that a suitable opening distance can be obtained during surgery, a suitable surgical field of view is guaranteed, and soft tissue will not be squeezed, which is conducive to postoperative recovery.

[0042] like Figure 3As shown, based on the above embodiment, in one embodiment, the first spreading piece 600 is a sheet-like structure, and the first spreading piece is provided with a plane body 620; or / and the second spreading piece 800 is a sheet-like structure, and the second spreading piece 800 is provided with an arc-shaped avoidance portion 810, and the arc-shaped avoidance portion 810 is arranged close to the second force-applying member 700 and opposite to the plane body 620. The first spreading piece 600 is a sheet-like structure and is provided with a plane body 620, which can more conveniently pull the psoas major muscle and reduce nerve and blood vessel damage; at the same time, the second spreading piece 800 is also a sheet-like structure, which is used to pull the abdominal soft tissue; and by providing the arc-shaped avoidance portion 810, it is beneficial to obtain a larger surgical field of view, reduce the spreading distance, and further avoid squeezing the soft tissue.

[0043] Based on the above embodiment, in one embodiment, a mounting groove 610 for installing a fixing pin is provided on the plane body 620. By providing the mounting groove 610, the expander can be directly fixed to the spine, solving the disadvantage that the traditional channel expander needs to be fixed by a serpentine arm, so that the operator can perform the operation vertically, the surgical field is not blocked, and it is convenient for the surgical operation.

[0044] like Figure 4 As shown, based on any of the above embodiments, the channel opener further includes a fixing assembly 40 for fixing the mounting member 20 at a preset position. In this way, the mounting member 20 can be fixed to a fixed object such as an operating table, an operating frame, or an operating bed through the fixing assembly 40.

[0045] Furthermore, the fixing assembly 40 includes a fixing member 41 movably mounted on the mounting member 20 , and a locking structure 42 for locking or releasing the fixing member 41 , and the fixing member 41 is provided with a toothed portion 43 connected to the operating bed.

[0046] Specifically, a. During the operation, the patient is placed on the operating table with the side facing upward, the target surgical segment is marked after fluoroscopy, and the surgical incision (4-6 cm transverse incision) is made;

[0047] b. The operator uses the channel opener and holds the force applying member (the first force applying member 500 or the second force applying member 700) to adjust the opening piece so that the opening piece opens the ideal surgical field, and then locks the fastener 410 to fix the opening piece and the mounting member 20;

[0048] c. Use the mounting groove 610 to insert the fixing needle so that the first expansion piece is relatively fixed to the patient's spine. If the fixation is firm, the operation can be performed directly; if the fixation effect is not good, the mounting member 20 can be fixed to the operating table through the fixing assembly 40 and then the operation can be performed.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A connecting mechanism, characterized in that: include: A first connecting member, wherein the first connecting member is provided with a clamping groove and a spring sheet structure, wherein one side of the spring sheet structure is provided with a first adjusting groove which is arranged through the inner side wall of the clamping groove, wherein the first adjusting groove is used to change the clamping size of the clamping groove, and the spring sheet structure is further provided with through holes which are arranged through both ends thereof; A second connecting member, the second connecting member is mounted on the first connecting member, the second connecting member is provided with a groove, and the center line of the groove is arranged at an angle with the center line of the clamping groove; the second connecting member is provided with two card bodies, and the first connecting member is provided with a card groove that is snap-fitted with the two card bodies; An adjusting block, wherein the adjusting block is arranged in the groove and the adjusting block is provided with a matching groove which matches with the groove to form a slide hole; and A fastening assembly, wherein the fastening assembly includes a fastener and a locking nut, wherein one end of the fastener is connected to the adjustment block, and the other end passes through the through hole and is threadedly connected to the locking nut, so as to change the closing size of the first adjustment slot. When the fastener is loosened, the second connecting member can rotate relative to the adjustment block.

2. The connection mechanism according to claim 1, characterized in that: When the fastener is locked, the second connecting member is fixed on the mounting member.

3. The connection mechanism according to claim 2, characterized in that: The inner side wall of the groove is a cylindrical structure, and the outer side wall of the adjustment block is matched with the inner side wall of the groove, so that the second connecting member can rotate relative to the adjustment block.

4. The connection mechanism according to claim 3, characterized in that: The second connecting member is fixedly connected to the first connecting member, and an outer wall of the adjusting block is provided with an arc groove. One end of the fastener is clamped in the arc groove and can move along the track of the arc groove, so that the fastener can drive the second connecting member to rotate.

5. The connection mechanism according to claim 4, characterized in that: A connecting body is provided at one end of the fastener, the connecting body is arranged in the groove, and the second connecting member is provided with a connecting groove which is limitedly matched with the connecting body.

6. The connection mechanism according to claim 5, characterized in that: The inner side surface of the connecting body is matched with the outer side wall of the adjusting block, and the connecting body is provided with a clamping portion matched with the arc groove.

7. The connection mechanism according to any one of claims 1 to 6, characterized in that: A second adjustment groove is also provided on one side of the spring sheet structure, and the second adjustment groove and the first adjustment groove are spaced apart from each other along the axial direction of the through hole.

8. A channel opener, characterized in that: The method comprises a connection mechanism according to any one of claims 1 to 7, wherein the connection mechanism comprises two, and further comprises: an annular mounting member, the connecting mechanism being slidably mounted on the mounting member through the slide slot hole; and A support assembly, the support assembly includes a first force-applying member, a first support assembly fixed on the first force-applying member, a second force-applying member, and a second support assembly fixed on the second force-applying member, the first force-applying member is arranged on a corresponding one of the connecting mechanisms through the clamping groove and can be moved relative to the corresponding connecting mechanism, the second force-applying member is arranged on another corresponding connecting mechanism through the clamping groove and can be moved relative to the corresponding connecting mechanism.

9. The channel opener according to claim 8, characterized in that: The first support member is a sheet-like structure, and the first support member is provided with a plane body; the second support member is a sheet-like structure, and the second support member is provided with an arc-shaped avoidance portion, and the arc-shaped avoidance portion is arranged close to the second force-applying member and opposite to the plane body.

10. The channel opener according to claim 9, characterized in that: The plane body is provided with a mounting groove for arranging a fixing needle.

Images