Valve interventional operation treatment auxiliary device

Abstract

The invention discloses a valve interventional operation treatment auxiliary device, and relates to the field of medical instruments, the valve interventional operation treatment auxiliary device comprises a mounting cover, a fitting ring is arranged below the mounting cover, a bonding layer is arranged below the fitting ring, the fitting ring is bonded to the skin surface to provide support for the mounting cover, the mounting cover is designed to be of an arc-shaped structure, and the bonding layer is arranged below the fitting ring. A supporting block is arranged on the inner side of the mounting cover, a through groove is formed in the middle of the supporting block and used for supporting the guide pipe, the supporting block and the mounting cover are in sliding connection, the supporting angle of the supporting block is changed, fixing blocks are fixed to the left side and the right side of the supporting block, and sliding grooves are connected to the outer sides of the fixing blocks in a sliding mode. According to the auxiliary device for valve interventional operation treatment, the catheter can penetrate through the supporting block to be inserted subsequently, and the supporting block can be moved and adjusted on the mounting cover in the arc direction, so that the insertion angle and the insertion direction of the catheter can be adjusted, and different interventional treatment requirements can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a valve intervention surgery treatment auxiliary device. Background Art

[0002] Aortic valve interventional treatment is a method of delivering the valve to the aortic valve area through interventional surgery to open it and achieve valve implantation. The interventional surgical treatment method can reduce trauma to the patient. The application number is CN202123182029.0, and a valve interventional surgery auxiliary device disclosed on September 16, 2022, includes, from the inside to the outside, a biological valve, a valve stent and an anti-reflux skirt. A suture edge made of fabric material is provided at a high position on the side of the valve stent. The suture edge is divided into three equal parts in a tripod shape, and the suture edge is divided into two equal parts in an ear-hanging type. A stent outer covering is provided on the outside of the valve stent. The stent outer covering wraps the lower half of the valve stent, and the upper edge is arc-shaped and corresponds to the adjacent valve sinus. The root of the suture edge starts from the outside of the valve stent and is connected to the stent outer covering. The suture edge and the outer coating of the stent are fixed by suturing. The device has a simple and reasonable structure, is easy and safe to operate, can greatly simplify the difficulty of aortic valve implantation surgery, shorten the operation time, and has good clinical application prospects; the application number is CN201911373282.9, a vascular interventional surgery device disclosed on May 19, 2020, includes two symmetrically arranged first mounting plates, the two first mounting plates are connected to the opposite sides by an auxiliary fixing device through a rotating shaft, the side walls of the two first mounting plates on the opposite side are provided with a vertically arranged second mounting plate, a telescopic rod is provided between the first mounting plate and the second mounting plate on the same side, a catheter fixing device is provided between the two second mounting plates, and a plurality of catheters of different models are provided between the two second mounting plates. This design has the advantages of simple structure, easy manufacturing, practicality and high efficiency; During current interventional surgery, the catheter needs to be gradually inserted into the body along the intervention direction. When inserting the catheter, the insertion direction of the catheter needs to be supported and maintained. When the catheter is supported by a stent, the placement and support of the stent are inconvenient to adjust, and the movement of the catheter lacks limiters. When encountering unexpected changes in external force, the rapid movement of the catheter will cause great damage to the patient. Summary of the invention

[0003] The purpose of the present invention is to provide a valve interventional surgery treatment auxiliary device to solve the above-mentioned background technology that the current insertion of the catheter requires the aid of a stent, the stent is inconvenient to adjust and install, and the movement of the pipeline lacks a limit, which is prone to unexpected problems during rapid movement.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve interventional surgery treatment auxiliary device, comprising a mounting cover, a fitting ring is arranged below the mounting cover, and an adhesive layer is arranged below the fitting ring, the fitting ring is bonded to the skin surface to provide support for the mounting cover, the mounting cover is designed in an arc-shaped structure, and a support block is arranged on the inner side of the mounting cover, and a through groove is arranged in the middle of the support block to provide support for the catheter, a sliding connection is formed between the support block and the mounting cover to change the support angle of the support block, and fixed blocks are fixed on both sides of the left and right sides of the support block, and the fixed block The outer side of the support block is slidably connected with a slide groove, and the slide groove is arc-shaped and opened inside the mounting cover. A limiting mechanism is arranged at the outer end of the support block to limit the sliding of the support block in the mounting cover to maintain the stability of the support block. A first connecting wheel is rotatably installed inside the support block, and a second connecting wheel is arranged on the front side of the first connecting wheel, and the first connecting wheel and the second connecting wheel are symmetrically arranged with respect to the support block. An overspeed locking mechanism is arranged at the outer ends of the first connecting wheel and the second connecting wheel to limit the rotation of the first connecting wheel and the second connecting wheel to maintain the stability of the insertion and removal of the catheter.

[0005] To further optimize the technical solution, a detachable connection is formed between the fitting ring and the mounting cover, so that the fitting ring can be replaced and reused.

[0006] To further optimize the technical solution, a connecting sleeve is fixed on the inner side of the fitting ring, and a threaded connection is formed between the connecting sleeve and the mounting cover.

[0007] To further optimize the technical solution, the limiting mechanism includes a positioning groove, a locking block, a first spring and a control mechanism; Positioning grooves are evenly arranged inside the slideway; A locking block is arranged inside the fixed block and between the fixed blocks to form a telescopic structure, and a snap-fit ​​connection is formed between the locking block and the positioning groove; A first spring, fixed to the inner end of the locking block to provide an outward thrust for the locking block; The control mechanism is arranged inside the supporting block to control the movement of the locking block.

[0008] To further optimize the technical solution, the locking block is made of magnetic material, and the control mechanism includes a magnetic attraction block, a second spring and a movable block; The magnetic attraction block is arranged inside the support block and between the support blocks to form an up-and-down sliding structure, and the magnetic attraction block attracts the locking block when the magnetic attraction block and the locking block are opposite to each other; A second spring is arranged below the magnetic attraction block to provide an upward thrust for the magnetic attraction block; The movable block is fixed above the magnetic attraction block to control the movement of the magnetic attraction block, and the upper end of the movable block is located above the supporting block.

[0009] To further optimize the technical solution, the overspeed locking mechanism includes a transmission shaft, a rotating disk and a speed limiting mechanism; A transmission shaft, fixed to the ends of the first connecting wheel and the second connecting wheel to rotate synchronously therewith; A rotating disk, fixed to the end of the transmission shaft; The speed limiting mechanism is arranged on the side of the rotating disk.

[0010] To further optimize the technical solution, the speed limiting mechanism includes a centrifugal block, a third spring and a clamping slot; The centrifugal block is arranged on the side of the rotating disk and forms a sliding connection between the rotating disk; A third spring, fixed to the inner end of the centrifugal block, provides a pulling force for the centrifugal block to move inward; The clamping grooves are arranged at equal angles on the outer side of the rotating disk, and a clamping structure is formed between the clamping grooves and the centrifugal blocks.

[0011] To further optimize the technical solution, an adjusting airbag is provided in the middle of the first connecting wheel, and the adjusting airbag is annularly wrapped around the middle of the first connecting wheel, and a volume control mechanism is connected to the inner side of the adjusting airbag.

[0012] Further optimizing the technical solution, the volume control mechanism includes a connecting pipe, a supplementary air bag, an extrusion plate, a control rod, a top block and an adjustment rod; A connecting pipe is arranged on the inner side of the regulating airbag; A supplementary air bag is arranged inside the first connecting wheel, and the supplementary air bag is connected to the regulating air bag through a connecting pipe; An extrusion plate is arranged on the right side of the supplementary air bag to provide extrusion for the supplementary air bag; A control rod is fixed on the right side of the extrusion plate, and a ball is arranged on the right end of the control rod; A top block is arranged at the outer end of the control rod, and the left side of the top block is designed in an inclined structure, and an up-and-down sliding structure is formed between the top block and the support block; The adjusting rod is rotatably mounted above the top block, and the adjusting rod penetrates the upper surface of the supporting block to form a threaded connection with the supporting block.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The installation cover provides support for the catheter, and the installation cover can be laid on the patient's skin surface through the fitting ring, so that the installation cover can be easily installed and laid. At the same time, the fitting ring can be removed from the installation cover and can be replaced and reused later, which is more environmentally friendly; 2. The catheter can be inserted through the support block for subsequent insertion, and the support block can be moved and adjusted in an arc direction on the mounting cover, so that the insertion angle and insertion direction of the catheter can be adjusted to adapt to different interventional treatment needs; 3. The fixed block can be fixed in the slide slot by connecting the locking block and the positioning slot, providing a limiting effect for the support block to keep its position stable. The locking block is controlled by pressing the movable block, which is convenient and quick to operate. 4. The first connecting wheel and the second connecting wheel provide support for the catheter. When the catheter moves, the first connecting wheel and the second connecting wheel are driven to rotate. With the overspeed locking mechanism, the first connecting wheel and the second connecting wheel can be locked when rotating rapidly, thereby preventing the catheter from moving too fast and improving its safety in use. 5. By adjusting the setting of the airbag, the first connecting wheel and the second connecting wheel can clamp and fit catheters of different sizes, thereby improving their scope of application. By squeezing the supplementary airbag, the volume of the adjusting airbag can be expanded so that it can contact the catheter, so that when the catheter moves, it can stably drive the first connecting wheel and the second connecting wheel to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a bottom view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the fitting ring of the present invention; Figure 4 It is a schematic diagram of the main cross-sectional structure of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at a in the middle; Figure 6 This is a schematic diagram of the three-dimensional structure of the support block of the present invention; Figure 7 This is a schematic diagram of the main cross-sectional structure of the fixing block of the present invention; Figure 8 This is a schematic diagram of the top-sectional structure of the support block of the present invention; Fig. 9 It is a schematic diagram of the side cross-section structure of the rotating disk of the present invention; Fig.10 This is a schematic diagram of the main cross-sectional structure of the first connecting wheel of the present invention.

[0015] In the figure: 1. mounting cover; 2. fitting ring; 3. connecting sleeve; 4. adhesive layer; 5. supporting block; 6. fixing block; 7. sliding groove; 8. positioning groove; 9. locking block; 10. first spring; 11. magnetic attraction block; 12. second spring; 13. movable block; 14. first connecting wheel; 15. second connecting wheel; 16. transmission shaft; 17. rotating disk; 18. centrifugal block; 19. third spring; 20. slot; 21. adjusting airbag; 22. connecting pipe; 23. supplementary airbag; 24. extrusion plate; 25. control rod; 26. top block; 27. adjusting rod. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: a valve intervention surgery treatment auxiliary device, including a mounting cover 1; Embodiment 1

[0018] The invention provides a technical solution, which discloses that a fitting ring 2 is arranged below the mounting cover 1, and an adhesive layer 4 is arranged below the fitting ring 2, and the fitting ring 2 is adhered to the skin surface to provide support for the mounting cover 1, the mounting cover 1 is designed with an arc-shaped structure, and a support block 5 is arranged on the inner side of the mounting cover 1, and a through groove is arranged in the middle of the support block 5 to provide support for the catheter, and a sliding connection is formed between the support block 5 and the mounting cover 1 to change the support angle of the support block 5, and fixed blocks 6 are fixed on the left and right sides of the support block 5, and the outer side of the fixed block 6 is slidably connected with a slide groove 7, and the slide groove 7 is opened in the shape of an arc inside the mounting cover 1, and a limiting mechanism is arranged at the outer end of the support block 5 to limit the support block 5 in The sliding inside the mounting cover 1 is limited to maintain the stability of the support block 5. A first connecting wheel 14 is rotatably installed inside the support block 5, and a second connecting wheel 15 is arranged on the front side of the first connecting wheel 14, and the first connecting wheel 14 and the second connecting wheel 15 are arranged symmetrically with respect to the support block 5. The outer ends of the first connecting wheel 14 and the second connecting wheel 15 are both provided with overspeed locking mechanisms to limit the rotation of the first connecting wheel 14 and the second connecting wheel 15 to maintain the stability of the insertion and extraction of the catheter. A detachable connection is formed between the fitting ring 2 and the mounting cover 1, so that the fitting ring 2 can be replaced and reused. A connecting sleeve 3 is fixed on the inner side of the fitting ring 2, and a threaded connection is formed between the connecting sleeve 3 and the mounting cover 1; When in use, the mounting cover 1 can be bonded to the entry position of the interventional catheter through the adhesive layer 4 under the fitting ring 2 to position the mounting cover 1. After use, the fitting ring 2 can release the threaded connection between the connecting sleeve 3 and the mounting cover 1 by rotation, so that the fitting ring 2 can be disassembled and replaced separately, and then the catheter is passed through the support block 5, and the support block 5 can be slid and adjusted on the mounting cover 1, so as to change the insertion angle and insertion direction of the catheter, and can provide a continuous support effect for the catheter. When the catheter moves, it will drive the first connecting wheel 14 and the second connecting wheel 15 to rotate. When the catheter moves too fast, the first connecting wheel 14 and the second connecting wheel 15 rotate rapidly, which will trigger the overspeed locking mechanism to lock the rotation of the first connecting wheel 14 and the second connecting wheel 15, thereby blocking the continued movement of the catheter, and also preventing the catheter from moving rapidly when it is accidentally pulled. Embodiment 2

[0019] On the basis of the first embodiment, a limiting mechanism is disclosed, which includes a positioning groove 8, a locking block 9, a first spring 10 and a control mechanism. The positioning groove 8 is evenly arranged inside the slide groove 7. The locking block 9 is arranged inside the fixed block 6 and between the fixed block 6 to form a telescopic structure, and a snap-fit ​​connection is formed between the locking block 9 and the positioning groove 8. The first spring 10 is fixed at the inner end of the locking block 9 to provide an outward thrust for the locking block 9. The control mechanism is arranged inside the support block 5 to control the movement of the locking block 9. The locking block 9 is made of a magnetic material. The control mechanism includes a magnetic attraction block 11, a second spring 12 and a movable block 13. The magnetic attraction block 11 is arranged inside the support block 5 and between the support block 5 to form an up and down sliding structure, and the magnetic attraction block 11 and the locking block 9 are relative to each other to attract the locking block 9. The second spring 12 is arranged below the magnetic attraction block 11 to provide an upward thrust for the magnetic attraction block 11. The movable block 13 is fixed above the magnetic attraction block 11 to control the movement of the magnetic attraction block 11, and the upper end of the movable block 13 is located above the support block 5. When adjusting the position of the support block 5, the movable block 13 can be pressed to drive the magnetic attraction block 11 to move. The magnetic attraction block 11 and the locking block 9 are relative to each other, and the locking block 9 is attracted to move the locking block 9, and the connection between the locking block 9 and the positioning groove 8 is released. The fixed block 6 can slide in the slide groove 7 to adjust the position of the support block 5. After the adjustment is completed, the movable block 13 is released, and the second spring 12 pushes the magnetic attraction block 11 to move upward, releasing its attraction effect on the locking block 9, and the locking block 9 can be extended again to connect with the positioning groove 8 to limit the support block 5. Embodiment 3

[0020] On the basis of the first embodiment, an overspeed locking mechanism is disclosed, which includes a transmission shaft 16, a rotating disk 17 and a speed limiting mechanism. The transmission shaft 16 is fixed at the ends of the first connecting wheel 14 and the second connecting wheel 15 to rotate synchronously therewith. The rotating disk 17 is fixed at the ends of the transmission shaft 16. The speed limiting mechanism is arranged on the side of the rotating disk 17. The speed limiting mechanism includes a centrifugal block 18, a third spring 19 and a slot 20. The centrifugal block 18 is arranged on the side of the rotating disk 17 and forms a sliding connection between the rotating disk 17. The third spring 19 is fixed at the inner end of the centrifugal block 18 to provide a pulling force for the centrifugal block 18 to move inward. The slot 20 is opened at an equal angle on the outer side of the rotating disk 17, and a locking structure is formed between the slot 20 and the centrifugal block 18. An adjusting airbag 21 is arranged in the middle of the first connecting wheel 14, and the adjusting airbag 21 is annularly covered in the middle of the first connecting wheel 14, and the adjusting airbag 2 1 is connected with a volume control mechanism, which includes a connecting pipe 22, a supplementary air bag 23, an extrusion plate 24, a control rod 25, a top block 26 and an adjusting rod 27. The connecting pipe 22 is arranged on the inner side of the adjusting air bag 21. The supplementary air bag 23 is arranged inside the first connecting wheel 14, and the supplementary air bag 23 is connected with the adjusting air bag 21 through the connecting pipe 22. The extrusion plate 24 is arranged on the right side of the supplementary air bag 23 to provide extrusion for the supplementary air bag 23. The control rod 25 is fixed on the right side of the extrusion plate 24, and a ball is arranged on the right end of the control rod 25. The top block 26 is arranged at the outer end of the control rod 25, and the left side of the top block 26 is designed in an inclined structure, and an up-and-down sliding structure is formed between the top block 26 and the support block 5. The adjusting rod 27 is rotatably installed above the top block 26, and the adjusting rod 27 passes through the upper surface of the support block 5 and forms a threaded connection with the support block 5. When the first connecting wheel 14 and the second connecting wheel 15 rotate at a low speed, the centrifugal block 18 is received inside the rotating disk 17 under the pulling force of the third spring 19. When the first connecting wheel 14 and the second connecting wheel 15 rotate rapidly, the rotating disk 17 rotates rapidly, the centrifugal force on the centrifugal block 18 increases, and the centrifugal block 18 is thrown outward, so that the centrifugal block 18 moves and connects with the card slot 20, and the rotation of the rotating disk 17 is limited, so that the first connecting wheel 14 and the second connecting wheel 15 stop rotating. The regulating airbag 21 can adapt to different catheters through the change of volume. When it is necessary to adjust the volume of the regulating airbag 21, the adjusting rod 27 can be rotated so that the adjusting rod 27 drives the top block 26 to move through the threaded connection between the supporting block 5, and the top block 26 moves downward to squeeze the control rod 25, so that it drives the squeezing plate 24 to squeeze the supplementary airbag 23, and the gas in the supplementary airbag 23 enters the regulating airbag 21 through the connecting pipe 22, so that the volume of the regulating airbag 21 expands, so that it can maintain contact with the catheter.

[0021] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve interventional surgery treatment auxiliary device, comprising a mounting cover (1); Features: A fitting ring (2) is provided below the mounting cover (1), and an adhesive layer (4) is provided below the fitting ring (2). The fitting ring (2) is adhered to the skin surface to provide support for the mounting cover (1). The mounting cover (1) is designed in an arc-shaped structure, and a support block (5) is provided on the inner side of the mounting cover (1), and a through groove is provided in the middle of the support block (5) to provide support for the catheter. A sliding connection is formed between the support block (5) and the mounting cover (1) so that the support angle of the support block (5) can be changed. Fixed blocks (6) are fixed on both left and right sides of the support block (5), and a slide groove (7) is slidably connected to the outer side of the fixed block (6), and the slide groove (7) is opened in an arc shape. Inside the mounting cover (1), a limiting mechanism is provided at the outer end of the support block (5) to limit the sliding of the support block (5) inside the mounting cover (1) and maintain the stability of the support block (5); a first connecting wheel (14) is rotatably installed inside the support block (5), and a second connecting wheel (15) is provided on the front side of the first connecting wheel (14); the first connecting wheel (14) and the second connecting wheel (15) are symmetrically arranged with respect to the support block (5); and an overspeed locking mechanism is provided at the outer ends of the first connecting wheel (14) and the second connecting wheel (15) to limit the rotation speed of the first connecting wheel (14) and the second connecting wheel (15) and maintain the stability of the insertion and extraction of the catheter.

2. The valve interventional surgery treatment auxiliary device according to claim 1, characterized in that: The fitting ring (2) and the mounting cover (1) are detachably connected, so that the fitting ring (2) can be replaced and reused.

3. The valve interventional surgery auxiliary device according to claim 2, characterized in that: A connecting sleeve (3) is fixed on the inner side of the fitting ring (2), and a threaded connection is formed between the connecting sleeve (3) and the mounting cover (1).

4. The valve interventional surgery treatment auxiliary device according to claim 1, characterized in that: The limiting mechanism comprises a positioning groove (8), a locking block (9), a first spring (10) and a control mechanism; Positioning grooves (8) are evenly arranged inside the slide groove (7); A locking block (9) is arranged inside the fixing block (6) and between the fixing blocks (6) to form a telescopic structure, and a snap-fit ​​connection is formed between the locking block (9) and the positioning groove (8); A first spring (10) fixed to the inner end of the locking block (9) to provide an outward thrust for the locking block (9); A control mechanism is arranged inside the support block (5) to control the movement of the locking block (9).

5. The valve interventional surgery treatment auxiliary device according to claim 4, characterized in that: The locking block (9) is made of a magnetic material, and the control mechanism comprises a magnetic attraction block (11), a second spring (12) and a movable block (13); A magnetic attraction block (11) is arranged inside the support block (5) and between the support blocks (5) to form an up-and-down sliding structure, and the magnetic attraction block (11) attracts the locking block (9) when the locking block (9) is facing each other; A second spring (12) is arranged below the magnetic attraction block (11) to provide an upward thrust for the magnetic attraction block (11); The movable block (13) is fixed above the magnetic attraction block (11) to control the movement of the magnetic attraction block (11), and the upper end of the movable block (13) is located above the supporting block (5).

6. The valve interventional surgery treatment auxiliary device according to claim 1, characterized in that: The overspeed locking mechanism comprises a transmission shaft (16), a rotating disk (17) and a speed limiting mechanism; A transmission shaft (16) is fixed to the ends of the first connecting wheel (14) and the second connecting wheel (15) and rotates synchronously therewith; A rotating disk (17) is fixed to the end of the transmission shaft (16); The speed limiting mechanism is arranged on the side of the rotating disk (17).

7. The valve interventional surgery treatment assisting device according to claim 6, characterized in that: The speed limiting mechanism comprises a centrifugal block (18), a third spring (19) and a clamping slot (20); A centrifugal block (18) is arranged on the side of the rotating disk (17) and is slidably connected to the rotating disk (17); A third spring (19) is fixed to the inner end of the centrifugal block (18) to provide a pulling force for the centrifugal block (18) to move inward; The clamping grooves (20) are arranged at equal angles on the outside of the rotating disk (17), and a clamping structure is formed between the clamping grooves (20) and the centrifugal block (18).

8. The valve interventional surgery treatment auxiliary device according to claim 1, characterized in that: An adjusting airbag (21) is provided in the middle of the first connecting wheel (14), and the adjusting airbag (21) is annularly wrapped around the middle of the first connecting wheel (14), and a volume control mechanism is connected to the inner side of the adjusting airbag (21).

9. The valve interventional surgery treatment auxiliary device according to claim 8, characterized in that: The volume control mechanism comprises a connecting pipe (22), a supplementary air bag (23), a squeezing plate (24), a control rod (25), a top block (26) and an adjusting rod (27); A connecting pipe (22) is arranged on the inner side of the regulating air bag (21); A supplementary air bag (23) is arranged inside the first connecting wheel (14), and the supplementary air bag (23) is connected to the regulating air bag (21) via a connecting pipe (22); A squeezing plate (24) is arranged on the right side of the supplementary air bag (23) to provide squeezing for the supplementary air bag (23); A control rod (25) is fixed on the right side of the extrusion plate (24), and a ball bearing is arranged at the right end of the control rod (25); A top block (26) is arranged at the outer end of the control rod (25), and the left side of the top block (26) is designed to be inclined, and an up-and-down sliding structure is formed between the top block (26) and the support block (5); The adjusting rod (27) is rotatably mounted above the top block (26), and the adjusting rod (27) penetrates the upper surface of the supporting block (5) to form a threaded connection with the supporting block (5).

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