Fusion cage distraction device

Abstract

The utility model provides a fusion cage distraction device, and belongs to the technical field of medical instruments. The utility model provides a fusion cage distraction device which comprises a holding piece, a connecting cylinder, an outer-layer adjusting cylinder and a middle-layer adjusting cylinder, the connecting cylinder is arranged at the left end of the holding piece, an opening of a containing groove formed in the holding piece is formed in the left end of the holding piece, the outer-layer adjusting cylinder penetrates into the containing groove from the left end of the connecting cylinder, the middle-layer adjusting cylinder is horizontally arranged, and the middle-layer adjusting cylinder penetrates into the containing groove from the left end of the connecting cylinder. The middle-layer adjusting cylinder is arranged in the outer-layer adjusting cylinder in a penetrating mode, the left end of the middle-layer adjusting cylinder penetrates out of the outer-layer adjusting cylinder, the right end of the middle-layer adjusting cylinder is arranged at the groove bottom of the right end of the containing groove, and first connecting rod pieces are arranged at the left end of the outer-layer adjusting cylinder and the left end of the middle-layer adjusting cylinder. The opening device for the fusion cage extends into the fusion cage, the position of the outer-layer adjusting cylinder in the horizontal direction is adjusted, the distance between the left end of the outer-layer adjusting cylinder and the left end of the middle-layer adjusting cylinder is changed, the height of the first connecting rod piece is changed, and the fusion cage is opened.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a fusion device opening device. Background Technology

[0002] For patients with congenital spinal diseases, degenerative diseases, benign and malignant tumors, spinal fractures, and intervertebral fusion problems in the thoracic, lumbar, and cervical spine, surgical implantation of a fusion cage between the intervertebral discs or vertebral bodies can achieve bony fusion and thus achieve a therapeutic effect. Lumbar intervertebral fusion surgery is an effective treatment for lumbar degeneration and instability, and various approaches to intervertebral fusion are widely used in the surgical treatment of lumbar spine diseases. Since its first use after lumbar intervertebral fusion surgery in 1988, the lumbar intervertebral fusion cage has become one of the basic procedures for treating lumbar degenerative diseases and spondylolisthesis due to its advantages in immediately restoring spinal stability and improving bone graft fusion rates. As an orthopedic implantable medical device, the lumbar intervertebral fusion cage can fuse the upper and lower vertebral bodies, maintain intervertebral disc height, reduce nerve root pressure, and maintain spinal stability, with the advantages of minimal surgical trauma and ease of operation. Lumbar interbody fusion cages are designed in various sizes, and their end-face shapes are uniform, making them unsuitable for different individuals and intervertebral spaces (cervical, thoracic, lumbar). During surgery, appropriate length, width, and height must be selected to match the product. Furthermore, existing fusion cages have fixed heights and angles, resulting in a small area for contact with the endplates, which hinders rapid patient recovery. Therefore, expandable fusion cages have been proposed. Expandable fusion cages are height-adjustable, featuring small implantation dimensions and large expansion dimensions. During use, the height of the fusion cage can be adjusted to accommodate different intervertebral space heights, greatly improving the versatility of the fusion cage, reducing surgical complexity, eliminating the need for multiple trial fittings of different sized fusion cages, and minimizing patient trauma. Existing expandable fusion devices typically rely on adjusting screws to control the movement of adjusting wedges, thereby expanding the closed expansion body. The bone graft space in the center of the fusion device is occupied by the adjusting screws and wedges, reducing the grafting space. Furthermore, it's impossible to accurately determine the required bone graft volume before implantation, leading to relatively insufficient bone particles after expansion, making it difficult to achieve adequate central pressure grafting. This results in a significantly increased non-fusion rate, low bone fusion rate, and unsatisfactory restoration of vertebral lordosis after vertebral fusion surgery. Therefore, to increase the amount of bone graft, a expandable fusion device for post-grafting has been introduced. This device does not have adjusting screws or wedges. It consists of an upper and lower fusion component, with the upper component covering the lower component. Surgical instruments are needed to expand the upper and lower fusion components, but existing surgical instruments cannot meet this requirement. Utility Model Content

[0003] The purpose of this invention is to provide a fusion device that can open the fusion device after bone grafting, so as to solve the problem that existing surgical instruments cannot open the fusion device.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fusion device is provided, comprising a gripper, a connecting cylinder, an outer adjusting cylinder, and a middle adjusting cylinder. The connecting cylinder is horizontally disposed at the left end of the gripper and along the length of the gripper. The gripper has a horizontal receiving groove, the opening of which is disposed on the left sidewall of the gripper. The receiving groove communicates with the internal space of the connecting cylinder. The outer adjusting cylinder extends into the receiving groove from the left end of the connecting cylinder. The middle adjusting cylinder is horizontally disposed and passes through the outer adjusting cylinder. The left end of the middle adjusting cylinder extends out of the outer adjusting cylinder. The right end of the middle adjusting cylinder is disposed at the bottom of the right end of the receiving groove. A first connecting rod is provided at the left end of the outer adjusting cylinder and the left end of the middle adjusting cylinder. Adjusting the horizontal position of the outer adjusting cylinder and the height of the first connecting rod opens the fusion device.

[0005] In one possible implementation, the right end of the outer adjusting cylinder is fitted with a threaded first rotating member, and the upper end face of the gripping member is provided with a first rotating groove. The first rotating member is disposed in the first rotating groove, and rotating the first rotating member changes the position of the outer adjusting cylinder.

[0006] In one possible implementation, the highest point of the first rotating member is located above the gripping member.

[0007] In one possible implementation, an inner layer adjusting rod is inserted inside the middle layer adjusting cylinder, with both ends of the inner layer adjusting rod extending out of the middle layer adjusting cylinder. A second connecting rod is provided between the left end of the inner layer adjusting rod and the left end of the middle layer adjusting cylinder. Adjusting the horizontal position of the inner layer adjusting rod and adjusting the height of the second connecting rod expands the fusion device.

[0008] In one possible implementation, the right end of the inner layer adjusting rod is fitted with a threaded second rotating member, and the upper end face of the gripping member is provided with a second rotating groove. The second rotating member is disposed in the second rotating groove, and rotating the second rotating member changes the position of the inner layer adjusting rod.

[0009] In one possible implementation, a third fixing block is provided at the left end of the inner layer adjusting rod, the second connecting rod includes a third connecting rod and a fourth connecting rod, the third connecting rod and the fourth connecting rod are hinged together, the other end of the third connecting rod is hinged to the third fixing block, and the fourth connecting rod is hinged to the left end of the middle layer adjusting cylinder.

[0010] In one possible implementation, a first fixing block is provided at the left end of the outer layer adjusting cylinder, the first connecting rod includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are hinged together, the other end of the first connecting rod is hinged to the first fixing block, and the second connecting rod is hinged to the left end of the middle layer adjusting cylinder.

[0011] In one possible implementation, a second fixing block is provided at the left end of the middle layer adjusting cylinder, and one end of the first connecting rod is hinged to the second fixing block.

[0012] In one possible implementation, a locking cylinder is provided at the left end of the connecting cylinder, the locking cylinder being used to connect the fusion device.

[0013] In one possible implementation, a grip handle is provided on the lower end surface of the grip member.

[0014] The beneficial effects of the fusion device provided by this utility model are as follows:

[0015] Compared with existing technologies, this invention includes a gripper, a connecting cylinder, an outer adjusting cylinder, and a middle adjusting cylinder. The gripper is horizontally positioned, and the connecting cylinder is horizontally positioned at the left end of the gripper, along its length. The gripper has a receiving groove with its opening facing left, located at the left end of the gripper. The right end of the outer adjusting cylinder enters the connecting cylinder from its left end, passes through the connecting cylinder, and enters the receiving groove of the gripper. The outer adjusting cylinder has the freedom of rotation and left-right movement within the receiving groove. The left end of the outer adjusting cylinder is located outside the left end of the connecting cylinder. The right end of the middle adjusting cylinder enters the outer adjusting cylinder from its left end, and exits the outer adjusting cylinder. The right end of the adjusting cylinder is fixedly located at the bottom of the right end of the receiving groove. The left end of the middle adjusting cylinder is located outside the left end of the outer adjusting cylinder. The two free ends of the first connecting rod are respectively located at the left end of the outer adjusting cylinder and the left end of the middle adjusting cylinder. The first connecting rod extends into the fusion device, adjusting the horizontal position of the outer adjusting cylinder, changing the distance between the left end of the outer adjusting cylinder and the left end of the middle adjusting cylinder, and changing the height of the middle part of the first connecting rod. The first connecting rod pushes the upper fusion piece of the fusion device away from the lower fusion piece of the fusion device, thereby opening the fusion device. After opening to the specified height, the device is removed from the fusion device. The operation is simple and can be used to open the fusion device after post-grafting, improving surgical efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of the fusion support device provided in an embodiment of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the gripping component used in an embodiment of the present utility model;

[0019] Figure 3 A vertical cross-sectional view of the fusion support device provided in an embodiment of this utility model;

[0020] Figure 4 for Figure 3 The diagram shows a partially enlarged structure. Figure 1 ;

[0021] Figure 5 for Figure 3 The diagram shows a partially enlarged structure. Figure 2 .

[0022] In the diagram: 1. Grip; 2. Receiving groove; 3. Connecting cylinder; 4. Outer adjusting cylinder; 5. First fixing block; 6. First connecting rod; 7. Second connecting rod; 8. First rotating component; 9. First rotating groove; 10. Middle adjusting cylinder; 11. Second fixing block; 12. Inner adjusting rod; 13. Third fixing block; 14. Third connecting rod; 15. Fourth connecting rod; 16. Second rotating component; 17. Second rotating groove; 18. Locking cylinder; 19. Grip handle. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Please refer to Figures 1 to 5The present invention provides a specific embodiment of a fusion device opening mechanism, comprising a gripper 1, a connecting cylinder 3, an outer adjusting cylinder 4, and a middle adjusting cylinder 10. The connecting cylinder 3 is horizontally disposed at the left end of the gripper 1 and is disposed along the length of the gripper 1. A horizontal receiving groove 2 is disposed on the gripper 1, and the opening of the receiving groove 2 is disposed on the left side wall of the gripper 1. The receiving groove 2 communicates with the internal space of the connecting cylinder 3. The outer adjusting cylinder 4 passes through the receiving groove 2 from the left end of the connecting cylinder 3. The middle adjusting cylinder 10 is horizontally disposed and passes through the outer adjusting cylinder 4. The left end of the middle adjusting cylinder 10 passes through the outer adjusting cylinder 4, and the right end of the middle adjusting cylinder 10 is disposed at the bottom of the right end of the receiving groove 2. A first connecting rod is disposed at the left end of the outer adjusting cylinder 4 and the left end of the middle adjusting cylinder 10. Adjusting the horizontal position of the outer adjusting cylinder 4 and adjusting the height of the first connecting rod opens the fusion device.

[0025] This utility model provides a fusion device opening mechanism. Compared with the prior art, it includes a gripper 1, a connecting cylinder 3, an outer adjusting cylinder 4, and a middle adjusting cylinder 10. The gripper 1 is horizontally positioned, and the connecting cylinder 3 is horizontally positioned at the left end of the gripper 1, along the length of the gripper 1. The gripper 1 has a receiving groove 2 with its opening facing left. The right end of the outer adjusting cylinder 4 passes through the connecting cylinder 3 from the left end and into the receiving groove 2 of the gripper 1. The outer adjusting cylinder 4 has the freedom of rotation and left and right movement within the receiving groove 2. The left end of the outer adjusting cylinder 4 is located outside the left end of the connecting cylinder 3. The right end of the middle adjusting cylinder 10 passes through the left end of the outer adjusting cylinder 4 into the outer adjusting cylinder 10. In step 4, the right end of the middle layer adjusting cylinder 10 extends outward from the right end of the outer layer adjusting cylinder 4. The right end of the middle layer adjusting cylinder 10 is fixedly set at the bottom of the right end of the receiving groove 2. The left end of the middle layer adjusting cylinder 10 is located outside the left end of the outer layer adjusting cylinder 4. The two free ends of the first connecting rod are respectively set at the left end of the outer layer adjusting cylinder 4 and the left end of the middle layer adjusting cylinder 10. The first connecting rod extends into the fusion device, adjusts the horizontal position of the outer layer adjusting cylinder 4, changes the distance between the left end of the outer layer adjusting cylinder 4 and the left end of the middle layer adjusting cylinder 10, and changes the height of the middle part of the first connecting rod. The first connecting rod pushes the upper fusion piece of the fusion device away from the lower fusion piece of the fusion device, thereby opening the fusion device. After opening to the specified height, the device is removed from the fusion device. The operation is simple and can be used to open the fusion device after bone grafting, improving surgical efficiency.

[0026] For details, please refer to Figures 1 to 5The device includes a grip 1, a connecting cylinder 3, an outer adjusting cylinder 4, and a middle adjusting cylinder 10. The grip 1 and connecting cylinder 3 are horizontally positioned. The connecting cylinder 3 is located at the left end of the grip 1. A receiving groove 2 is positioned within the grip 1 along its length. The left opening of the receiving groove 2 is located on the left side wall of the grip 1, and the bottom of the right end of the receiving groove 2 is located in the middle of the grip 1. The left end of the outer adjusting cylinder 4 is located outside the left end of the connecting cylinder 3, and the right end of the outer adjusting cylinder 4 passes through the connecting cylinder 3 and enters the receiving groove 2 of the grip 1. The outer adjusting cylinder 4 has freedom of movement within the connecting cylinder 3 and the receiving groove 2. The middle adjusting cylinder 10 passes inside the outer adjusting cylinder 4, and its left end is located within the outer adjusting cylinder 4. The right end of the middle layer adjusting cylinder 10 is fixedly installed at the bottom of the right end of the receiving groove 2 on the outer side of the left end of the cylinder 4, and the right end of the middle layer adjusting cylinder 10 is located outside the right end of the outer layer adjusting cylinder 4. The outer layer adjusting cylinder 4 is sleeved on the outer side of the middle layer adjusting cylinder 10. The first connecting rod connects the left end of the middle layer adjusting cylinder 10 and the left end of the outer layer adjusting cylinder 4. By controlling the left end of the outer layer adjusting cylinder 4 to move closer to the left end of the middle layer adjusting cylinder 10, the height of the middle part of the first connecting rod can be increased. The first connecting rod extends into the fusion device and pushes the upper fusion part of the fusion device away from the lower fusion part of the fusion device, thereby opening the fusion device. There are two sets of the first connecting rod, which are symmetrically arranged on the front and rear sides of the outer layer adjusting cylinder 4 to increase the stability of the device.

[0027] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 4 The right end of the outer adjusting cylinder 4 is fitted with a threaded first rotating part 8, and the upper end face of the gripping part 1 is provided with a first rotating groove 9. The first rotating part 8 is located in the first rotating groove 9, and rotating the first rotating part 8 changes the position of the outer adjusting cylinder 4.

[0028] For details, please refer to Figures 1 to 4 The outer wall of the right end of the outer adjusting cylinder 4 is provided with a thread. The first rotating part 8 is sleeved on the outside of the outer adjusting cylinder 4. The first rotating part 8 is threadedly matched with the outer adjusting cylinder 4. The first rotating groove 9 is provided on the upper end face of the gripping part 1. The first rotating groove 9 is provided near the left end of the gripping part 1. The first rotating groove 9 is perpendicular to the receiving groove 2. The first rotating groove 9 is suitable for receiving the first rotating part 8. When the first rotating part 8 is rotated, the position of the outer adjusting cylinder 4 is changed under the action of the thread.

[0029] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 4 The highest point of the first rotating member 8 is located above the holding member 1.

[0030] For details, please refer to Figures 1 to 4The highest point of the first rotating member 8 is higher than the upper surface of the gripping member 1, which facilitates the rotation of the first rotating member 8.

[0031] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 5 An inner layer adjusting rod 12 is inserted inside the middle layer adjusting cylinder 10. Both ends of the inner layer adjusting rod 12 extend out of the middle layer adjusting cylinder 10. A second connecting rod is provided between the left end of the inner layer adjusting rod 12 and the left end of the middle layer adjusting cylinder 10. Adjusting the horizontal position of the inner layer adjusting rod 12 and adjusting the height of the second connecting rod will open the fusion device.

[0032] For details, please refer to Figures 1 to 5 The inner layer adjusting rod 12 is installed through the middle layer adjusting cylinder 10. The left end of the inner layer adjusting rod 12 is located to the left of the left end of the middle layer adjusting cylinder 10, and the right end of the inner layer adjusting rod 12 is located to the right of the right end of the middle layer adjusting cylinder 10. The right end of the inner layer adjusting rod 12 extends out of the right end of the gripping member 1. The second connecting rod connects the left end of the middle layer adjusting cylinder 10 and the left end of the inner layer adjusting rod 12. By controlling the left end of the inner layer adjusting rod 12 to move closer to the left end of the middle layer adjusting cylinder 10, the height of the middle part of the second connecting rod can be increased. The second connecting rod extends into the fusion device and pushes the upper fusion member of the fusion device away from the lower fusion member of the fusion device, thereby opening the fusion device. There are two sets of the second connecting rod, which are symmetrically arranged on the front and rear sides of the inner layer adjusting rod 12 to increase the stability of the device.

[0033] For further details, please refer to Figures 1 to 5 The second link is located to the left of the first link. The first and second links can be controlled independently and adjusted to different heights, which allows the left and right ends of the fusion device to be opened to different heights.

[0034] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 4 The right end of the inner layer adjusting rod 12 is fitted with a threaded second rotating part 16, and the upper end surface of the grip 1 is provided with a second rotating groove 17. The second rotating part 16 is disposed in the second rotating groove 17, and the position of the inner layer adjusting rod 12 is changed by rotating the second rotating part 16.

[0035] For details, please refer to Figures 1 to 4The outer wall of the right end of the inner layer adjusting rod 12 is provided with a thread. The second rotating part 16 is sleeved on the outer side of the inner layer adjusting rod 12. The second rotating part 16 is threadedly matched with the inner layer adjusting rod 12. The second rotating groove 17 is provided on the upper end face of the grip 1. The second rotating groove 17 is provided near the right end of the grip 1 and is perpendicular to the inner layer adjusting rod 12. The second rotating groove 17 is suitable for accommodating the second rotating part 16. When the second rotating part 16 is rotated, the position of the inner layer adjusting rod 12 is changed under the action of the thread. The highest point of the second rotating part 16 is higher than the upper end face of the grip 1, which facilitates the rotation of the second rotating part 16.

[0036] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 5 The left end of the inner layer adjusting rod 12 is provided with a third fixing block 13. The second connecting rod includes a third connecting rod 14 and a fourth connecting rod 15. The third connecting rod 14 and the fourth connecting rod 15 are hinged together. The other end of the third connecting rod 14 is hinged to the third fixing block 13. The fourth connecting rod 15 is hinged to the left end of the middle layer adjusting cylinder 10.

[0037] For details, please refer to Figures 1 to 5 The third fixing block 13 is located at the left end of the inner layer adjusting rod 12. The second connecting rod includes a third connecting rod 14 and a fourth connecting rod 15. The first end of the third connecting rod 14 is hinged to the first end of the fourth connecting rod 15. The second end of the third connecting rod 14 is hinged to the side wall of the third fixing block 13. The second end of the fourth connecting rod 15 is hinged to the side wall of the left end of the middle layer adjusting cylinder 10.

[0038] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 5 The outer layer adjusting cylinder 4 has a first fixing block 5 at its left end. The first connecting rod includes a first connecting rod 6 and a second connecting rod 7. The first connecting rod 6 and the second connecting rod 7 are hinged together. The other end of the first connecting rod 6 is hinged to the first fixing block 5. The second connecting rod 7 is hinged to the left end of the middle layer adjusting cylinder 10.

[0039] For details, please refer to Figures 1 to 5 The first fixing block 5 is located at the left end of the outer layer adjusting cylinder 4. The first connecting rod includes a first connecting rod 6 and a second connecting rod 7. The first end of the first connecting rod 6 is hinged to the first end of the second connecting rod 7. The second end of the first connecting rod 6 is hinged to the side wall of the first fixing block 5. The second end of the second connecting rod 7 is hinged to the side wall of the left end of the middle layer adjusting cylinder 10.

[0040] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 5 The left end of the middle layer adjusting cylinder 10 is provided with a second fixing block 11, and one end of the first connecting rod is hinged to the second fixing block 11.

[0041] For details, please refer to Figures 1 to 5 The second fixing block 11 is located at the left end of the middle layer adjusting cylinder 10, the second end of the second connecting rod 7 is hinged to the side wall of the second fixing block 11, and the second end of the fourth connecting rod 15 is hinged to the side wall of the second fixing block 11.

[0042] For further details, please refer to Figures 1 to 5 When the first and second connecting rods extend into the fusion unit, the lower end faces of the first fixing block 5, the second fixing block 11, and the third fixing block 13 abut against the upper surface of the lower fusion component of the fusion unit, increasing the stability of the device during use.

[0043] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 3 A locking cylinder 18 is provided at the left end of the connecting cylinder 3. The locking cylinder 18 is used to connect the fusion device.

[0044] For details, please refer to Figures 1 to 3 The locking cylinder 18 is located at the left end of the connecting cylinder 3 and is set along the length of the connecting cylinder 3. The outer wall of the locking cylinder 18 is threaded, and the thread of the outer wall of the locking cylinder 18 matches the inner wall of the instrument hole of the fusion device, so as to facilitate the fixing of the device to the fusion device.

[0045] As a specific embodiment of the fusion device provided by this utility model, please refer to Figures 1 to 3 A grip handle 19 is provided on the lower end surface of the grip 1.

[0046] For details, please refer to Figures 1 to 3 The handle 19 is located on the lower end face of the grip 1 and on the right end of the grip 1, which facilitates gripping the device.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fusion device for opening up a fusion vessel, characterized in that, The device includes a gripper, a connecting cylinder, an outer adjusting cylinder, and a middle adjusting cylinder. The connecting cylinder is horizontally positioned at the left end of the gripper and extends along its length. The gripper has a horizontal receiving groove with its opening on the left sidewall, communicating with the internal space of the connecting cylinder. The outer adjusting cylinder extends into the receiving groove from the left end of the connecting cylinder. The middle adjusting cylinder is horizontally positioned and extends into the outer adjusting cylinder, with its left end protruding from the outer adjusting cylinder. Its right end is located at the bottom of the right end of the receiving groove. A first connecting rod is provided at the left ends of the outer and middle adjusting cylinders. Adjusting the horizontal position of the outer adjusting cylinder and the height of the first connecting rod expands the fusion device.

2. The fusion device for opening up a fusion vessel as described in claim 1, characterized in that, The right end of the outer adjusting cylinder is fitted with a threaded first rotating component, and the upper end face of the gripping component is provided with a first rotating groove. The first rotating component is disposed in the first rotating groove, and rotating the first rotating component changes the position of the outer adjusting cylinder.

3. The fusion device for opening up a fusion vessel as described in claim 2, characterized in that, The highest point of the first rotating member is located above the gripping member.

4. The fusion device for opening up a fusion vessel as described in claim 1, characterized in that, An inner layer adjusting rod is inserted into the middle layer adjusting cylinder. Both ends of the inner layer adjusting rod protrude from the middle layer adjusting cylinder. A second connecting rod is provided between the left end of the inner layer adjusting rod and the left end of the middle layer adjusting cylinder. Adjusting the horizontal position of the inner layer adjusting rod and adjusting the height of the second connecting rod will open the fusion device.

5. The fusion device as described in claim 4, characterized in that, The right end of the inner layer adjusting rod is fitted with a threaded second rotating component, and the upper end face of the gripping component is provided with a second rotating groove. The second rotating component is disposed in the second rotating groove, and rotating the second rotating component changes the position of the inner layer adjusting rod.

6. The fusion device for opening up a fusion vessel as described in claim 4, characterized in that, The left end of the inner layer adjusting rod is provided with a third fixing block. The second connecting rod includes a third connecting rod and a fourth connecting rod. The third connecting rod and the fourth connecting rod are hinged together. The other end of the third connecting rod is hinged to the third fixing block. The fourth connecting rod is hinged to the left end of the middle layer adjusting cylinder.

7. The fusion device for opening up a fusion vessel as described in claim 1, characterized in that, The outer layer adjusting cylinder has a first fixing block at its left end. The first connecting rod includes a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are hinged together. The other end of the first connecting rod is hinged to the first fixing block. The second connecting rod is hinged to the left end of the middle layer adjusting cylinder.

8. The fusion device for opening up a fusion vessel as described in claim 1, characterized in that, A second fixing block is provided at the left end of the middle layer adjusting cylinder, and one end of the first connecting rod is hinged to the second fixing block.

9. The fusion device for opening a fusion vessel as described in claim 1, characterized in that, A locking cylinder is provided at the left end of the connecting cylinder, and the locking cylinder is used to connect the fusion device.

10. The fusion device for spreading out a fusion vessel as described in claim 1, characterized in that, A grip handle is provided on the lower end surface of the grip.

Images