Vascular anastomosis device for vascular surgery

Abstract

The invention discloses a vascular anastomosis device for vascular surgery, and relates to the technical field of medical instruments, the vascular anastomosis device comprises a mounting cylinder main body, an assembly seat is rotatably mounted on one side of the mounting cylinder main body, a limiting structure is arranged between the assembly seat and the mounting cylinder main body, an assembly plate is fixed at a use position through an assembly hole, and a user pulls a connecting strip to fix the assembly plate to the mounting cylinder main body. The connecting strip drives the adjusting rod to move downwards, the adjusting rod drives one end of the compression spring to move, so that the compression spring is stretched, the adjusting rod drives the dislocation rack to move downwards, the dislocation rack is separated from the dislocation gear ring, and the assembling plate and the assembling base can rotate along the mounting ring base. And after adjustment, the connecting strip is loosened, the adjusting rod and the staggered rack return to the original position under the action of the compression spring and are clamped with the staggered gear ring, the angle of the mounting sleeve is conveniently limited, and the mounting sleeve is conveniently used by the user.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a vascular anastomosis device for vascular surgery. Background Art

[0002] Vascular anastomosis devices refer to devices that connect blood vessels. In addition to the artery-capillary-vein connection, human blood vessels can also be directly connected between arteries, between veins, and even between arteries and veins to form vascular anastomosis. Vascular anastomosis can be divided into arterial anastomosis, venous anastomosis, arteriovenous anastomosis and collateral anastomosis.

[0003] After searching, a vascular anastomosis device for vascular surgery with a publication number of CN110200670B was disclosed, which specifically relates to the field of medical equipment technology, including an outer tube, wherein a vascular nesting mechanism is provided inside the outer tube; the vascular nesting mechanism includes a fixed inner tube, wherein a spiral extension tube is provided at one end of the fixed inner tube, a top plate is fixedly provided on the top of the fixed inner tube, a positioning ring is provided on the outer side of the top plate, a through-hole is provided on the surface of the outer tube, a positioning groove is provided on the inner wall of the through-hole, the positioning ring is slidably connected to the positioning groove, a first airbag is fixedly provided on the outer side of the other end of the fixed inner tube, a delivery air tube is provided inside the fixed inner tube and the top plate, and a second airbag is provided at one end of the delivery air tube. By providing a vascular nesting mechanism, the present invention can quickly nest the blood vessel in the fixed inner tube, effectively solving the problem of narrow blood vessels that are difficult to nest, reducing the difficulty of blood vessel nesting, and reducing the nesting time, thereby improving the speed of vascular anastomosis;

[0004] During use, the existing vascular anastomosis devices for vascular surgery clamp the two sides of the ruptured blood vessels by means of the vascular clamps on both sides. However, the existing vascular clamps are mostly clamped by means of a combination of springs and clamping blocks commonly found on the market. Although they have a certain fixing effect, they cannot control the two vascular clamps to clamp at the same time, making the operation very inconvenient. In addition, the existing vascular anastomosis devices cannot be used for good fixing. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a vascular anastomosis device for vascular surgery, which solves the problem that the existing vascular anastomosis device for vascular surgery clamps the two sides of a ruptured blood vessel by means of vascular clamps on both sides during use. However, the existing vascular clamps are mostly clamped by means of a combination of springs and clamping blocks commonly found on the market. Although they have a certain fixing effect, they cannot control the two vascular clamps to clamp at the same time, which makes the operation very inconvenient. In addition, the existing vascular anastomosis device cannot be well fixed for use.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vascular anastomosis device for vascular surgery, comprising a mounting tube main body, an assembly seat is rotatably mounted on one side of the mounting tube main body, a limiting structure is arranged between the assembly seat and the mounting tube main body, vascular clamp seats are movably mounted on both ends of one side of the mounting tube, a first clamp block and a second clamp block are movably mounted on one side of the vascular clamp seat, a clamping structure is arranged between the first clamp block and the second clamp block, the first clamp block and the second clamp block are both in the shape of elongated strips, and anti-slip grooves are arranged on the opposite sides of the first clamp block and the second clamp block.

[0007] Preferably, the mounting tube body is cylindrical, a movable groove is provided on one side of the mounting tube body, movable blocks are movably mounted at both ends of the movable groove, and one end of the movable block is fixedly connected to one side of the vascular clamp seat.

[0008] Preferably, a double-thread screw is rotatably installed in the middle of the interior of the mounting barrel body, one end of the double-thread screw is movably inserted into the outside of the mounting barrel body and is installed with a rotating disk, the rotating disk is rotatably connected to the outside of the mounting barrel body, and both ends of the double-thread screw are movably installed with movable screw sleeves, and the movable screw sleeves are fixedly connected to the movable block.

[0009] Preferably, the limiting structure includes a mounting ring seat, the mounting ring seat is fixedly mounted on both ends of the mounting tube body, an assembly plate is rotatably mounted on the outer side of the mounting ring seat, one side of the assembly plate is fixedly connected to the assembly seat, one side of the assembly seat is evenly provided with assembly holes, the assembly holes are in the shape of long strips, an annular groove is opened inside the mounting ring seat, an offset gear ring is arranged inside the annular groove, an offset rack is movably mounted inside the annular groove, and the offset gear ring is clamped with the offset rack.

[0010] Preferably, a groove is provided on the surface of the assembly plate, and two adjusting rods are movably inserted on one side of the groove, one end of the adjusting rod is movably inserted in the annular groove and connected to the offset rack, and the other end of the adjusting rod is fixedly installed with a connecting strip, and the surface of the adjusting rod is provided with a compression spring connected to the connecting strip.

[0011] Preferably, the clamping structure includes an installation groove, a first guide rod is fixedly installed in the middle of the installation groove, a first sliding seat is movably sleeved on the surface of the first guide rod, and a first return spring connected to the first sliding seat is sleeved on the surface of the first guide rod.

[0012] Preferably, second guide rods are fixedly installed on both sides of the installation groove, the surface movable sleeves of the two second guide rods are provided with second sliding seats, and the surface movable sleeves of the second guide rods are provided with second return springs connected with the second sliding seats.

[0013] Preferably, a first adjustment groove is opened on one side of the installation groove, and a second adjustment groove is opened on one side of the installation groove, and the two second adjustment grooves are symmetrically distributed on both sides of the first adjustment groove, and a first adjustment block is movably installed inside the first adjustment groove, and the two ends of the first adjustment block are respectively fixedly connected to the first clamping block and the first sliding seat, and a second adjustment block is movably inserted inside the second adjustment groove, and the two ends of the second sliding block are respectively fixedly connected to the second clamping block and the second sliding seat.

[0014] Preferably, a first adjustment rack is provided on both sides of the first sliding seat, a second adjustment rack is provided on the side of the second sliding seat opposite to the first sliding seat, rotating rods are fixedly installed on both sides of the installation groove, and an engaging gear is rotatably installed on the surface of the rotating rod, and both sides of the engaging gear are respectively meshed with the first adjustment rack and the second adjustment rack.

[0015] Preferably, a pull rod is movably inserted inside the first guide rod, one end of the pull rod is movably inserted into the outside of the vascular clamp seat and is installed with a sliding block, both sides of the first guide rod are provided with sliding grooves, and a sliding block connected to the first sliding seat and the pull rod is movably installed inside the sliding groove, both ends of the mounting tube body are fixedly installed with fixing plates, one side of the fixing plate is fixedly installed with a mounting sleeve, a connecting rod is movably installed inside the mounting sleeve, one end of the connecting rod is fixedly installed with an adjusting strip, one side of the adjusting strip is provided with a movable groove, and the sliding block is movably connected to the movable groove.

[0016] The present invention provides a vascular anastomosis device for vascular surgery, which has the following features compared with the prior art:

[0017] Beneficial effects:

[0018] 1. In this vascular anastomosis device for vascular surgery, the user drives the double-thread screw to rotate by rotating the disk, and the movable screw sleeve moves along the double-thread screw in relative or separated directions under the action of the thread. The movable screw sleeve drives the vascular clamp seat to move through the movable block, and the positions of the two vascular clamp seats are adjusted to facilitate clamping different positions. Under the action of the clamping structure of the first clamp block and the second clamp block, the blood vessel is clamped well, which is convenient for medical staff to repair the blood vessel.

[0019] 2. In this vascular anastomosis device for vascular surgery, the assembly plate is fixed at the place of use through the assembly hole. The user pulls the connecting strip, and the connecting strip drives the adjusting rod to move downward. The adjusting rod drives one end of the clamping spring to move, so that the clamping spring is stretched, and the adjusting rod drives the offset rack to move downward, so that the offset rack is disengaged from the offset tooth ring, so that the assembly plate and the assembly seat can rotate along the mounting ring seat, so that the angle of the mounting tube body with respect to the mounting seat can be adjusted, which is convenient for users to use. After adjustment, the connecting strip is loosened, and the adjusting rod and the offset rack are restored to their original positions under the action of the clamping spring, and are engaged with the offset tooth ring, which is convenient for limiting the angle of the mounting sleeve, which is convenient for users to use.

[0020] 3. For this type of vascular anastomosis device for vascular surgery, the user pulls the pull rod, and the pull rod drives the first sliding seat to move along the first guide rod through the slider, and the first sliding seat compresses the first return spring, and the first sliding seat drives the first adjusting rack to move, and the first adjusting rack drives the meshing gear to rotate, and the second sliding seat moves along the second guide rod under the action of the second adjusting rack to compress the second return spring, and the first sliding seat and the second sliding seat drive the first clamping block and the second clamping block to move in the direction of separation through the first adjusting block and the second adjusting block, and the blood vessel is inserted between the first clamping block and the second clamping block, and the user releases the pull rod, and the first sliding seat and the second sliding seat return to their original positions under the action of the first return spring and the second return spring, and the first clamping block and the second clamping block move in relative directions, which is convenient for quick clamping of the blood vessel.

[0021] 4. In this type of vascular anastomosis device for vascular surgery, the user pulls the adjustment bar, and the adjustment bar drives the two pull rods to move synchronously through the sliding block, so that the first clamping block and the second clamping block on both sides can move simultaneously, so that both sides of the blood vessel can be clamped and fixed at the same time, so that the overall device has a good clamping and fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the surface structure of the device of the present invention;

[0023] Figure 2 It is a schematic diagram of the side structure of the device of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the installation location of the side assembly seat of the device of the present invention;

[0025] Figure 4 It is a schematic diagram of the overall structure of the vascular clamp in the device of the present invention;

[0026] Figure 5 It is a schematic diagram of a half-section structure of a vascular clip seat in the device of the present invention;

[0027] Figure 6It is a schematic diagram of the half-section structure of the vascular clamp seat in the device of the present invention.

[0028] In the figure: 1. Mounting tube body; 2. Assembly seat; 3. Assembly hole; 4. Blood vessel clamp seat; 5. First clamp block; 6. Second clamp block; 7. Fixing plate; 8. Mounting sleeve; 9. Adjustment strip; 10. Connecting rod; 11. Mounting ring seat; 12. Offset gear ring; 13. Double-thread screw; 14. Offset rack; 15. Adjustment rod; 16. Compression spring; 17. Moving screw sleeve; 18. First adjustment slot; 19. Second adjustment slot; 20. Sliding block; 21. First guide rod; 22. Second guide rod; 23. First sliding seat; 24. First adjustment rack; 25. First return spring; 26. Second sliding seat; 27. Second adjustment rack; 28. Second return spring; 29. ​​Engaging gear; 30. Pull rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1 and Figure 2 , a vascular anastomosis device for vascular surgery, comprising a mounting tube body 1, both ends of one side of the mounting tube are movably mounted with a vascular clamp seat 4, one side of the vascular clamp seat 4 is respectively movably mounted with a first clamp block 5 and a second clamp block 6, a clamping structure is arranged between the first clamp block 5 and the second clamp block 6, the first clamp block 5 and the second clamp block 6 are both in the shape of long strips, and the first clamp block 5 and the second clamp block 6 are arranged on the opposite side with an anti-slip groove, the mounting tube body 1 is cylindrical, one side of the mounting tube body 1 is provided with a movable groove, both ends of the movable groove are movably mounted with movable blocks, one end of the movable block is fixedly connected to one side of the vascular clamp seat 4, a double-thread screw 13 is rotatably mounted in the middle of the mounting tube body 1, one end of the double-thread screw 13 is movably inserted into the outside of the mounting tube body 1 and is mounted with a rotating disk, the rotating disk is rotatably connected to the outside of the mounting tube body 1, and both ends of the double-thread screw 13 are movably mounted with movable screw sleeves 17, and the movable screw sleeve 17 is fixedly connected to the movable block;

[0031] In this embodiment, the user drives the double-thread screw 13 to rotate by rotating the disk, and the movable screw sleeve 17 moves in relative or separate directions along the double-thread screw 13 under the action of the thread. The movable screw sleeve 17 drives the vascular clamp seat 4 to move through the movable block, and adjusts the positions of the two vascular clamp seats 4 to facilitate clamping different positions. Under the action of the first clamp block 5 and the second clamp block 6, the blood vessel can be clamped well under the action of the clamping structure, which is convenient for medical staff to repair the blood vessel.

[0032] See also Figure 1 and Figure 3 A vascular anastomosis device for vascular surgery, wherein an assembly seat 2 is rotatably mounted on one side of the mounting tube body 1, and a limiting structure is arranged between the assembly seat 2 and the mounting tube body 1, and the limiting structure comprises a mounting ring seat 11, and the mounting ring seat 11 is fixedly mounted on both ends of the mounting tube body 1, and an assembly plate is rotatably mounted on the outer side of the mounting ring seat 11, and one side of the assembly plate is fixedly connected to the assembly seat 2, and one side of the assembly seat 2 is evenly provided with assembly holes 3, and the assembly holes 3 are in the shape of a long strip, and the interior of the mounting ring seat 11 is provided with There is an annular groove, an offset tooth ring 12 is arranged inside the annular groove, an offset rack 14 is movably installed inside the annular groove, the offset tooth ring 12 is clamped with the offset rack 14, a groove is opened on the surface of the assembly plate, two adjustment rods 15 are movably inserted on one side of the groove, one end of the adjustment rod 15 is movably inserted in the annular groove and connected to the offset rack 14, the other end of the adjustment rod 15 is fixedly installed with a connecting strip, and the surface of the adjustment rod 15 is sleeved with a compression spring 16 connected to the connecting strip;

[0033] In this embodiment, the assembly plate is fixed at the place of use through the assembly hole 3, and the user pulls the connecting strip, and the connecting strip drives the adjusting rod 15 to move downward, and the adjusting rod 15 drives one end of the clamping spring 16 to move, so that the clamping spring 16 is stretched, and the adjusting rod 15 drives the offset rack 14 to move downward, so that the offset rack 14 is disengaged from the offset gear ring 12, so that the assembly plate and the assembly seat 2 can rotate along the mounting ring seat 11, so as to facilitate the adjustment of the angle of the mounting tube body 1 with respect to the mounting seat 2, which is convenient for the user to use. After adjustment, the connecting strip is loosened, and the adjusting rod 15 and the offset rack 14 are restored to their original positions under the action of the clamping spring 16, and are clamped with the offset gear ring 12, so as to facilitate the limiting of the angle of the mounting sleeve, which is convenient for the user to use.

[0034] See also Figures 4 to 6, a vascular anastomosis device for vascular surgery, the clamping structure includes a mounting groove, a first guide rod 21 is fixedly installed in the middle of the mounting groove, a first sliding seat 23 is movably sleeved on the surface of the first guide rod 21, a first return spring 25 connected to the first sliding seat 23 is sleeved on the surface of the first guide rod 21, second guide rods 22 are fixedly installed on both sides of the mounting groove, two second guide rods 22 are movably sleeved on the surfaces of the second guide rods 22, a second return spring 28 connected to the second sliding seat 26 is movably sleeved on the surface of the second guide rods 22, a first adjustment groove 18 is opened on one side of the mounting groove, a second adjustment groove 19 is opened on one side of the mounting groove, two second adjustment grooves 19 are symmetrically distributed on both sides of the first adjustment groove 18, a first adjustment block is movably installed inside the first adjustment groove 18, and the second The two ends of an adjusting block are respectively fixedly connected with the first clamping block 5 and the first sliding seat 23, the second adjusting block is movably inserted inside the second adjusting groove 19, the two ends of the second sliding block 20 are respectively fixedly connected with the second clamping block 6 and the second sliding seat 26, the first sliding seat 23 is provided with a first adjusting rack 24 on both sides, the second sliding seat 26 is provided with a second adjusting rack 27 on the side opposite to the first sliding seat 23, the two sides of the interior of the installation groove are fixedly installed with a rotating rod, the surface of the rotating rod is rotatably installed with a meshing gear 29, the two sides of the meshing gear 29 are respectively meshed with the first adjusting rack 24 and the second adjusting rack 27, the first guide rod 21 is movably inserted with a pull rod 30, the first guide rod 21 is provided with a slide groove on both sides, and the slide groove is movably installed with a slider connected with the first sliding seat 23 and the pull rod 30;

[0035] In this embodiment, the user pulls the pull rod 30, and the pull rod 30 drives the first sliding seat 23 to move along the first guide rod 21 through the slider, and the first sliding seat 23 compresses the first return spring 25, and the first sliding seat 23 drives the first adjusting rack 24 to move, and the first adjusting rack 24 drives the meshing gear 29 to rotate, and the second sliding seat 26 moves along the second guide rod 22 under the action of the second adjusting rack 27, and compresses the second return spring 28. The first sliding seat 23 and the second sliding seat 26 drive the first clamping block 5 and the second clamping block 6 to move in the direction of separation through the first adjusting block and the second adjusting block, and the blood vessel is inserted between the first clamping block 5 and the second clamping block 6. The user releases the pull rod 30, and the first sliding seat 23 and the second sliding seat 26 return to their original positions under the action of the first return spring 25 and the second return spring 28, and the first clamping block 5 and the second clamping block 6 move in relative directions, which is convenient for quick clamping of the blood vessel.

[0036] See also Figures 1 to 3A vascular anastomosis device for vascular surgery, one end of the pull rod 30 is movably inserted into the outside of the vascular clamp seat 4 and is installed with a sliding block 20, both ends of the installation tube body 1 are fixedly installed with a fixing plate 7, one side of the fixing plate 7 is fixedly installed with a mounting sleeve 8, the interior of the mounting sleeve 8 is movably installed with a connecting rod 10, one end of the connecting rod 10 is fixedly installed with an adjustment bar 9, one side of the adjustment bar 9 is provided with a movable groove, and the sliding block 20 is movably connected with the movable groove;

[0037] In this embodiment, the user pulls the adjustment bar 9, and the adjustment bar 9 drives the two pull rods 30 to move synchronously through the sliding block 20, so that the first clamping block 5 and the second clamping block 6 on both sides can move simultaneously, so that both sides of the blood vessel can be clamped and fixed at the same time, so that the overall device has a good clamping and fixing effect.

[0038] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A vascular anastomosis device for vascular surgery, comprising a mounting tube body (1), characterized in that: An assembly seat (2) is rotatably mounted on one side of the mounting tube body (1), a limiting structure is arranged between the assembly seat (2) and the mounting tube body (1), a vascular clamp seat (4) is movably mounted on both ends of one side of the mounting tube, a first clamp block (5) and a second clamp block (6) are movably mounted on one side of the vascular clamp seat (4), a clamping structure is arranged between the first clamp block (5) and the second clamp block (6), the first clamp block (5) and the second clamp block (6) are both in the shape of long strips, and anti-slip grooves are arranged on opposite sides of the first clamp block (5) and the second clamp block (6).

2. A vascular anastomosis device for vascular surgery according to claim 1, characterized in that: The mounting tube body (1) is cylindrical, and a movable groove is provided on one side of the mounting tube body (1). Moving blocks are movably mounted at both ends of the movable groove, and one end of the moving block is fixedly connected to one side of the vascular clamp seat (4).

3. A vascular anastomosis device for vascular surgery according to claim 2, characterized in that: A double-thread screw (13) is rotatably mounted in the middle of the installation barrel body (1); one end of the double-thread screw (13) is movably inserted into the outside of the installation barrel body (1) and is mounted with a rotating disk; the rotating disk is rotatably connected to the outside of the installation barrel body (1); both ends of the double-thread screw (13) are movably mounted with movable screw sleeves (17); the movable screw sleeves (17) are fixedly connected to the movable block.

4. A vascular anastomosis device for vascular surgery according to claim 3, characterized in that: The limiting structure comprises a mounting ring seat (11), wherein the mounting ring seat (11) is fixedly mounted at two ends of the mounting tube body (1), an assembly plate is rotatably mounted on the outer side of the mounting ring seat (11), one side of the assembly plate is fixedly connected to the assembly seat (2), one side of the assembly seat (2) is evenly provided with assembly holes (3), the assembly holes (3) are in the shape of long strips, an annular groove is provided inside the mounting ring seat (11), an offset tooth ring (12) is arranged inside the annular groove, an offset rack (14) is movably mounted inside the annular groove, and the offset tooth ring (12) is clamped with the offset rack (14).

5. A vascular anastomosis device for vascular surgery according to claim 4, characterized in that: A groove is provided on the surface of the assembly plate, and two adjusting rods (15) are movably inserted into one side of the groove. One end of the adjusting rod (15) is movably inserted into the annular groove and connected to the offset rack (14), and a connecting strip is fixedly installed on the other end of the adjusting rod (15). A compression spring (16) connected to the connecting strip is sleeved on the surface of the adjusting rod (15).

6. A vascular anastomosis device for vascular surgery according to claim 5, characterized in that: The clamping structure comprises an installation groove, a first guide rod (21) is fixedly installed in the middle of the installation groove, a first sliding seat (23) is movably sleeved on the surface of the first guide rod (21), and a first return spring (25) connected to the first sliding seat (23) is sleeved on the surface of the first guide rod (21).

7. A vascular anastomosis device for vascular surgery according to claim 6, characterized in that: Second guide rods (22) are fixedly mounted on both sides of the installation groove, and second sliding seats (26) are movably sleeved on the surfaces of the two second guide rods (22). Second return springs (28) connected to the second sliding seats (26) are movably sleeved on the surfaces of the second guide rods (22).

8. A vascular anastomosis device for vascular surgery according to claim 7, characterized in that: A first adjustment groove (18) is provided on one side of the installation groove, and a second adjustment groove (19) is provided on one side of the installation groove. The two second adjustment grooves (19) are symmetrically distributed on both sides of the first adjustment groove (18). A first adjustment block is movably installed inside the first adjustment groove (18), and two ends of the first adjustment block are respectively fixedly connected to the first clamping block (5) and the first sliding seat (23). A second adjustment block is movably inserted inside the second adjustment groove (19), and two ends of the second sliding block (20) are respectively fixedly connected to the second clamping block (6) and the second sliding seat (26).

9. A vascular anastomosis device for vascular surgery according to claim 8, characterized in that: The first sliding seat (23) is provided with a first adjustment rack (24) on both sides, the second sliding seat (26) is provided with a second adjustment rack (27) on the side opposite to the first sliding seat (23), and rotating rods are fixedly installed on both sides of the installation groove, and a meshing gear (29) is rotatably installed on the surface of the rotating rod, and the two sides of the meshing gear (29) are respectively meshed with the first adjustment rack (24) and the second adjustment rack (27).

10. The vascular anastomosis device for vascular surgery according to claim 9, characterized in that: A pull rod (30) is movably inserted inside the first guide rod (21), one end of the pull rod (30) is movably inserted into the outer side of the vascular clamp seat (4) and is installed with a sliding block (20), both sides of the first guide rod (21) are provided with sliding grooves, and a sliding block connected to the first sliding seat (23) and the pull rod (30) is movably installed inside the sliding groove, both ends of the installation tube body (1) are fixedly installed with a fixing plate (7), one side of the fixing plate (7) is fixedly installed with a mounting sleeve (8), and a connecting rod (10) is movably installed inside the mounting sleeve (8), one end of the connecting rod (10) is fixedly installed with an adjustment strip (9), one side of the adjustment strip (9) is provided with a movable groove, and the sliding block (20) is movably connected to the movable groove.

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