Minimally invasive bypass proximal anastomosis device

Abstract

The invention relates to the technical field of anastomosis devices, in particular to a minimally invasive bypass proximal anastomosis device. The following technical scheme is provided mainly aiming at the problems that the coronary artery ischemia risk is high due to the fact that an anastomotic stoma is far away from a surgical incision, operation is difficult, and the error-tolerant rate is low, and the risks of aorta rupture, dissection and stroke can be increased for an ascending aorta lesion patient. Sliding grooves are formed in the two sides of the fixing cylinder. The first sleeve is arranged in the fixing cylinder, the outer side of the first sleeve is in sliding connection with a second sleeve, the outer side of the second sleeve is in sliding connection with a third sleeve, and the third sleeve, the second sleeve and the first sleeve are all arranged in a step shape. Operation is easy and convenient, by means of collaborative design of the handle, the sleeve and the driving plate, the surgical operation difficulty can be lowered, efficiency can be improved, and anastomosis is accurate and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of anastomotic devices, and in particular to a minimally invasive proximal bypass anastomotic device. Background Art

[0002] Coronary heart disease is a major disease that endangers health. Coronary artery bypass grafting and interventional treatment are important methods to solve myocardial ischemia caused by coronary heart disease. Traditional CABG surgery requires splitting the sternum, which is very traumatic. For elderly patients with multiple complications, the surgical risk is high, and there is also a risk of sternal nonunion. The quality of life of patients after CABG surgery is affected in the early stage, and the subsequent rehabilitation treatment and care also bring serious burdens to patients, families and society.

[0003] The left thoracotomy minimally invasive bypass surgery achieves the same surgical effect as the traditional open-chest CABG surgery through a 6-8 cm incision in the left anterior chest area. By avoiding damage to the sternum, it can reduce surgical trauma, reduce surgical blood transfusions, shorten postoperative hospitalization time, improve the patient's postoperative quality of life, and save medical resources.

[0004] However, minimally invasive bypass surgery with a small left chest incision requires the same surgical operations as traditional open-chest bypass surgery to be completed in a small space. The surgical difficulty is much higher than that of open-chest surgery, which severely limits the promotion of this technology. In recent years, with the development of intraoperative hemodynamic monitoring technology, as well as the development and use of new cardiac stabilizers and retractors, the exposure and operation of distal anastomoses in all target vascular areas have been overcome. However, since the anastomosis of the ascending aorta is far away from the surgical incision, the operation is extremely difficult. At the same time, the tolerance rate of the ascending aorta anastomosis is low, the risk of coronary ischemia during the operation is extremely high, and patients with ascending aortic lesions also have an increased risk of aortic rupture, dissection and stroke. The anastomosis operation at the proximal end of the ascending aorta has become the biggest problem in the promotion of minimally invasive bypass technology. In view of this, the present invention proposes a minimally invasive proximal anastomosis device for bypass surgery. Summary of the invention

[0005] The purpose of the present invention is to propose a minimally invasive proximal anastomosis device to address the problems in the background technology that the anastomosis is far from the surgical incision, the operation is difficult, the fault tolerance is low, and the risk of coronary ischemia is high. In addition, patients with ascending aortic lesions will also increase the risk of aortic rupture, dissection and stroke.

[0006] The technical solution of the present invention is as follows: a minimally invasive proximal end anastomosis device for bypassing comprises a handle, one end of the handle is fixedly connected to a fixed cylinder, and both sides of the fixed cylinder are provided with slide grooves; a first sleeve is arranged in the fixed cylinder, a second sleeve is slidably connected to the outer side of the first sleeve, and a third sleeve is slidably connected to the outer side of the second sleeve, and the third sleeve, the second sleeve and the first sleeve are all arranged in a stepped shape, and the first sleeve, the second sleeve and the third sleeve are respectively fixedly connected to the first limit column, the second limit column and the third limit column which are slidably connected to the slide groove on both sides; two groups of driving plates rotatably connected to both sides of the fixed cylinder, the two groups of driving plates are commonly fixedly connected to a synchronization plate on the side away from the handle, and the two groups of driving plates are respectively provided with a first guide groove, a second guide groove and a third guide groove corresponding to the first limit column, the second limit column and the third limit column; an anastomosis assembly sleeved and installed on the bottom of the second sleeve, and the anastomosis assembly is used to anastomose the proximal end of the ascending aorta; a positioning mechanism installed on the outer ring of the second sleeve, and the positioning mechanism is used to fix the position of the anastomosis assembly and facilitate the separation of the anastomosis assembly.

[0007] Optionally, the driving plate is fan-shaped, and the arc-shaped surfaces of the two groups of driving plates are provided with a first groove, a first pull rope is provided in the first groove, one end of the first pull rope is fixedly connected to the driving plate, the other ends of the two groups of the first pull ropes are commonly fixedly connected to a pull ring, a positioning frame is slidably connected to the first pull rope, and the positioning frame is fixedly connected to the side of the handle.

[0008] Optionally, the anastomosis assembly includes an anastomosis cylinder sleeved on the outer ring of the second sleeve, and multiple groups of metal needles are fixedly connected to the bottom of the anastomosis cylinder. The multiple groups of metal needles are arranged in a circular array, and extrusion blocks are arranged on the inner side of the multiple groups of metal needles, and the extrusion blocks are located below the first sleeve.

[0009] Optionally, the outer ring of the anastomotic tube is provided with multiple groups of through holes, and the multiple groups of through holes are distributed in a ring array. A pressure needle fixedly connected to the anastomotic tube is arranged at the position of the through hole, and the top of the pressure needle is arranged in an arc shape. The pressure needle is arranged below the third sleeve.

[0010] Optionally, the positioning mechanism includes a fixed ring fixedly connected to the outer ring of the second sleeve, a rotating ring is rotatably connected to the outside of the fixed ring, a rotating plate is fixedly connected to the bottom of the rotating ring, an arc-shaped limiting rod is fixedly connected in the rotating plate, a positioning block is slidably connected to the limiting rod, the positioning block is fixedly connected to the top of the anastomosis tube, a baffle is provided on the side of the positioning block away from the rotating plate, and the baffle is fixedly connected to the side of the second sleeve.

[0011] Optionally, one end of the limit rod away from the baffle is fixedly connected to the limit plate, and a fixed block sleeved on the outer ring of the limit rod is provided on the side of the limit plate close to the rotating plate. The fixed block is fixedly connected to the side of the second sleeve, and a spring sleeved on the outer ring of the limit rod is provided between the fixed block and the rotating plate.

[0012] Optionally, it also includes a removal component connected to the positioning mechanism, the removal component is used to drive the positioning mechanism to remove the anastomosis component, the removal component includes a second pull rope wrapped around the outer ring of the rotating ring, the outer ring of the rotating ring is provided with a second groove, one end of the second pull rope is fixedly connected to the second groove, the other end of the second pull rope is fixedly connected to a removal button, a positioning ring is slidably connected to the removal button, and a mounting frame is fixedly connected between the positioning ring and the handle.

[0013] In summary, the present application includes at least one of the following beneficial technical effects: The present invention uses a handle and a unique sleeve structure connected thereto, such as a first sleeve, a second sleeve and a third sleeve that cooperate with each other, and the driving plate and the synchronization plate control their sliding. Medical staff only need to operate the handle to accurately adjust the position and state of the anastomotic assembly. Compared with the traditional complex anastomotic operation, the present invention greatly simplifies the surgical process, reduces the difficulty of operation, saves surgical time, and strives for a better treatment opportunity for patients, thereby improving surgical efficiency and quality. Furthermore, through the multiple sets of metal needles and inner extrusion blocks arranged in a circular array at the bottom of the anastomosis component, the proximal end of the ascending aorta can be accurately anastomosed to ensure that the anastomotic site is tightly fitted and reduce the risk of complications such as postoperative bleeding; at the same time, the matching positioning mechanism can not only firmly fix the position of the anastomotic component during the operation to ensure the accuracy of the anastomosis, but also use the removal components, such as the second pull rope, removal button and other structures, to conveniently and safely remove the anastomotic component after the operation to avoid secondary damage to the anastomotic site, which is beneficial to the patient's postoperative recovery; In summary, the present invention is easy to operate, and with the help of the coordinated design of the handle, sleeve and drive plate, it can reduce the difficulty of surgical operation, improve efficiency, and the anastomosis is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a minimally invasive proximal bypass anastomosis device is provided; Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure; Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 is a schematic diagram of the structure of the anastomosis component; Figure 5 It is a schematic diagram of the state where the metal needle is squeezed and deformed; Figure 6 This is a schematic diagram of the state where the pressing needle is squeezed and deformed; Figure 7 Schematic diagram of the state after matching.

[0015] Reference numerals: 1. Handle; 11. Fixed cylinder; 12. Slide groove; 2. driving plate; 21. synchronizing plate; 22. first groove; 23. first guide groove; 24. second guide groove; 25. third guide groove; 3. First sleeve; 31. First limiting column; 4. Second sleeve; 41. Second limiting column; 5. Third sleeve; 51. Third limiting column; 6. Anastomosis assembly; 61. Anastomosis tube; 62. Metal needle; 63. Extrusion block; 64. Through hole; 65. Pressing needle; 7. Positioning mechanism; 71. Fixed ring; 72. Rotating ring; 73. Rotating plate; 74. Limit rod; 75. Positioning block; 76. Baffle; 77. Limit plate; 78. Fixed block; 79. Spring; 8. Removal assembly; 81. Second pull rope; 82. Removal button; 83. Positioning ring; 84. Installation frame; 9. first pull rope; 91. positioning frame; 92. pull ring. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example

[0022] like Figures 1 to 7 As shown, a minimally invasive proximal anastomosis device for bypass surgery proposed by the present invention includes a handle 1, which is convenient for moving the anastomosis assembly 6 to the anastomosis position through the handle 1. A fixed cylinder 11 is fixedly connected to one end of the handle 1, and sliding grooves 12 are provided on both sides of the fixed cylinder 11 for limiting the movement of the first sleeve 3, the second sleeve 4 and the third sleeve 5.

[0023] For details, please refer to Figures 5 to 7 The above-mentioned anastomosis device includes a first sleeve 3 arranged in a fixed sleeve 11, a second sleeve 4 is slidably connected to the outside of the first sleeve 3, a third sleeve 5 is slidably connected to the outside of the second sleeve 4, the third sleeve 5, the second sleeve 4 and the first sleeve 3 are all arranged in a stepped shape, and the first sleeve 3, the second sleeve 4, and the third sleeve 5 are respectively fixedly connected on both sides with a first limiting column 31, a second limiting column 41 and a third limiting column 51 slidably connected to the slide groove 12, so that the first sleeve 3, the second sleeve 4 and the third sleeve 5 move smoothly.

[0024] Furthermore, the above-mentioned anastomosis device includes two groups of driving plates 2 rotatably connected to both sides of the fixed cylinder 11, and the two groups of driving plates 2 are fixedly connected to a synchronization plate 21 on one side away from the handle 1 to ensure the synchronous movement of the two groups of driving plates 2. The two groups of driving plates 2 are respectively provided with a first guide groove 23, a second guide groove 24 and a third guide groove 25 corresponding to the first limit column 31, the second limit column 41 and the third limit column 51. When the driving plate 2 rotates, the first guide groove 23, the second guide groove 24 and the third guide groove 25 respectively drive the first limit column 31, the second limit column 41 and the third limit column 51 to slide in the slide groove 12, thereby adjusting the upper and lower positions of the first sleeve 3, the second sleeve 4 and the third sleeve 5. Figure 5 As shown, when the driving plate 2 rotates 25°, the first limiting column 31, namely the first sleeve 3, moves downward; Figure 6 As shown, when the driving plate 2 rotates 50°, the third limiting column 51, namely the third sleeve 5, is driven to move downward. Thus, the first sleeve 3 and the third sleeve 5 sequentially press the anastomotic assembly 6 downward to deform it for anastomosis.

[0025] The driving plate 2 is fan-shaped, and the arcuate surfaces of the two groups of driving plates 2 are provided with first grooves 22, and the first pull rope 9 is provided in the first groove 22. One end of the first pull rope 9 is fixedly connected to the driving plate 2, so that the driving plate 2 can be rotated by pulling the first pull rope 9. The other ends of the two groups of first pull ropes 9 are fixedly connected to a pull ring 92, so that the first pull rope 9 can be pulled through the pull ring 92. A positioning frame 91 is slidably connected to the first pull rope 9, and the positioning frame 91 is fixedly connected to the side of the handle 1. The positioning frame 91 is used to limit the first pull rope 9.

[0026] Furthermore, the anastomosis device includes an anastomosis assembly 6 sleeved and installed on the bottom of the second sleeve 4, and the anastomosis assembly 6 is used to anastomose the proximal end of the ascending aorta. The anastomosis assembly 6 includes an anastomosis tube 61 sleeved on the outer ring of the second sleeve 4, and multiple groups of metal needles 62 are fixedly connected to the bottom of the anastomosis tube 61. The multiple groups of metal needles 62 are arranged in a circular array, and the great saphenous vein passes through the metal needles 62. By everting the great saphenous vein, the metal needles 62 penetrate the great saphenous vein. Extrusion blocks 63 are arranged on the inner sides of the multiple groups of metal needles 62, and the extrusion blocks 63 are located below the first sleeve 3, so that when the first sleeve 3 moves downward, the metal needles 62 are squeezed and deformed by the extrusion blocks 63, and the anastomosis is performed in cooperation with the pressing needles 65. The outer circle of the anastomosis tube 61 is provided with multiple groups of through holes 64, and the multiple groups of through holes 64 are distributed in a ring array. A pressure needle 65 fixedly connected to the anastomosis tube 61 is arranged at the position of the through hole 64. The top of the pressure needle 65 is arranged in an arc shape. The pressure needle 65 is arranged below the third sleeve 5, so that when the third sleeve 5 moves downward, the pressure needle 65 is squeezed to cooperate with the metal needle 62 for anastomosis.

[0027] It is worth mentioning that the above-mentioned anastomotic device includes a positioning mechanism 7 installed on the outer ring of the second sleeve 4, and the positioning mechanism 7 is used to fix the position of the anastomotic assembly 6 and facilitate the separation of the anastomotic assembly 6. The positioning mechanism 7 includes a fixed ring 71 fixedly connected to the outer ring of the second sleeve 4, and a rotating ring 72 is rotatably connected to the outer side of the fixed ring 71. The position of the fixed ring 71 is fixed so that the rotating ring 72 keeps rotating in the original position. A rotating plate 73 is fixedly connected to the bottom of the rotating ring 72, and the rotating ring 72 drives the rotating plate 73 to rotate synchronously when rotating. A limiting rod 74 arranged in an arc is fixedly connected to the rotating plate 73, and a positioning block 75 is slidably connected to the limiting rod 74. The positioning block 75 is fixedly connected to the top of the anastomotic tube 61, and the positioning block 75 is set to prevent the anastomotic assembly 6 from moving up and down. A baffle 76 is set on the side of the positioning block 75 away from the rotating plate 73, and the baffle 76 is fixedly connected to the side of the second sleeve 4. The baffle 76 is used to limit the positioning block 75 to prevent the positioning block 75 from moving away from the rotating plate 73. One end of the limit rod 74 away from the baffle 76 is fixedly connected to the limit plate 77. A fixing block 78 sleeved on the outer ring of the limit rod 74 is provided on the side of the limit plate 77 close to the rotating plate 73. The fixing block 78 is fixedly connected to the side of the second sleeve 4. A spring 79 sleeved on the outer ring of the limit rod 74 is provided between the fixing block 78 and the rotating plate 73. The spring 79 is used to release the elastic force to drive the rotating plate 73 to approach the positioning block 75, thereby ensuring that the limit rod 74 extends into the positioning block 75 for limiting.

[0028] Finally, the anastomosis device further comprises a dismantling assembly 8 connected to the positioning mechanism 7, and the dismantling assembly 8 is used to drive the positioning mechanism 7 to dismantle the anastomosis assembly 6. The dismantling assembly 8 comprises a second pull rope 81 surrounding the outer ring of the rotating ring 72, and the outer ring of the rotating ring 72 is provided with a second groove, and one end of the second pull rope 81 is fixedly connected to the second groove, and the second pull rope 81 drives the rotating ring 72 to rotate. The other end of the second pull rope 81 is fixedly connected to a dismantling button 82, and the dismantling button 82 is provided to facilitate pulling the second pull rope 81. A positioning ring 83 is slidably connected to the dismantling button 82, and a mounting frame 84 is fixedly connected between the positioning ring 83 and the handle 1, and the mounting frame 84 is used to fix the position of the positioning ring 83 and limit the position through the positioning ring 83.

[0029] In this embodiment, the great saphenous vein is first passed through the middle of the first sleeve 3, the second sleeve 4 and the third sleeve 5, so that one end of the great saphenous vein passes through the position of the anastomosis component 6. The great saphenous vein is everted so that the metal needle 62 penetrates the great saphenous vein. When performing proximal anastomosis, the device is inserted into the chest cavity through the surgical incision and delivered to the aortic puncture position to ensure that the anastomosis device is perpendicular to the aorta and the metal needle 62 is deeply inserted into the aorta. The anastomosis device is operated outside the incision. The operator pulls the first pull rope 9 through the pull ring 92 outside the incision and drives the drive plate 2 to rotate, thereby driving the first sleeve 3 and the third sleeve 5 to move downward in sequence under the action of the first guide groove 23, the second guide groove 24 and the third guide groove 25. When the first sleeve 3 moves downward, the metal needle 62 is everted by the extrusion block 63. When the third sleeve 5 moves downward, the pressure needle 65 is deformed and cooperates with the metal needle 62 for anastomosis, completing the bridge vessel-aorta proximal anastomosis operation. Then, by pulling the removal button 82, the second pull rope 81 is driven to rotate the rotating ring 72, and the rotating ring 72 drives the rotating plate 73 to squeeze the spring 79, and at the same time drives the limit rod 74 to move out of the positioning block 75, thereby lifting the device upward, and the anastomosis component 6 still stays in the vascular anastomosis position, completing the separation of the anastomosis component 6.

[0030] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A minimally invasive proximal bypass anastomosis device, characterized in that: include: A handle (1), one end of the handle (1) being fixedly connected to a fixing cylinder (11), and both sides of the fixing cylinder (11) being provided with sliding grooves (12); A first sleeve (3) is arranged in the fixed sleeve (11), the first sleeve (3) is slidably connected to the outside of the first sleeve (4), the second sleeve (4) is slidably connected to the outside of the second sleeve (4), the third sleeve (5), the second sleeve (4) and the first sleeve (3) are all arranged in a stepped shape, and the first sleeve (3), the second sleeve (4) and the third sleeve (5) are respectively fixedly connected to the two sides thereof with a first limiting column (31), a second limiting column (41) and a third limiting column (51) slidably connected to the slide groove (12); Two groups of drive plates (2) are rotatably connected to both sides of the fixed cylinder (11); the two groups of drive plates (2) are fixedly connected to a synchronization plate (21) at one side away from the handle (1); the two groups of drive plates (2) are respectively provided with a first guide groove (23), a second guide groove (24) and a third guide groove (25) corresponding to the first limit column (31), the second limit column (41) and the third limit column (51); an anastomotic assembly (6) sleeved and mounted on the bottom of the second sleeve (4), the anastomotic assembly (6) being used for anastomosing the proximal end of the ascending aorta; A positioning mechanism (7) is mounted on the outer ring of the second sleeve (4), wherein the positioning mechanism (7) is used to fix the position of the anastomotic assembly (6) and facilitate the detachment of the anastomotic assembly (6).

2. A minimally invasive proximal bypass anastomosis device according to claim 1, characterized in that: The driving plate (2) is arranged in a fan shape, and the arcuate surfaces of the two groups of driving plates (2) are provided with a first groove (22), a first pull rope (9) is arranged in the first groove (22), one end of the first pull rope (9) is fixedly connected to the driving plate (2), the other ends of the two groups of the first pull ropes (9) are commonly fixedly connected to a pull ring (92), a positioning frame (91) is slidably connected to the first pull rope (9), and the positioning frame (91) is fixedly connected to the side of the handle (1).

3. A minimally invasive proximal bypass anastomosis device according to claim 2, characterized in that: The anastomotic assembly (6) comprises an anastomotic cylinder (61) sleeved on the outer ring of the second sleeve (4); a plurality of groups of metal needles (62) are fixedly connected to the bottom of the anastomotic cylinder (61); the plurality of groups of metal needles (62) are arranged in a circular array; an extrusion block (63) is arranged on the inner side of the plurality of groups of metal needles (62); the extrusion block (63) is located below the first sleeve (3).

4. A minimally invasive proximal bypass anastomosis device according to claim 3, characterized in that: The outer ring of the anastomotic tube (61) is provided with a plurality of groups of through holes (64), which are distributed in a ring array. A pressing needle (65) fixedly connected to the anastomotic tube (61) is provided at the position of the through hole (64), and the top of the pressing needle (65) is arranged in an arc shape. The pressing needle (65) is arranged below the third sleeve (5).

5. A minimally invasive proximal bypass anastomosis device according to claim 4, characterized in that: The positioning mechanism (7) comprises a fixed ring (71) fixedly connected to the outer ring of the second sleeve (4); a rotating ring (72) is rotatably connected to the outer side of the fixed ring (71); a rotating plate (73) is fixedly connected to the bottom of the rotating ring (72); an arc-shaped limiting rod (74) is fixedly connected to the rotating plate (73); a positioning block (75) is slidably connected to the limiting rod (74); the positioning block (75) is fixedly connected to the top of the anastomotic tube (61); a baffle (76) is provided on the side of the positioning block (75) away from the rotating plate (73); and the baffle (76) is fixedly connected to the side of the second sleeve (4).

6. The minimally invasive proximal bypass anastomosis device according to claim 5, characterized in that: One end of the limit rod (74) away from the baffle (76) is fixedly connected to the limit plate (77); a fixed block (78) sleeved on the outer ring of the limit rod (74) is provided on the side of the limit plate (77) close to the rotating plate (73); the fixed block (78) is fixedly connected to the side of the second sleeve (4); and a spring (79) sleeved on the outer ring of the limit rod (74) is provided between the fixed block (78) and the rotating plate (73).

7. The minimally invasive proximal bypass anastomosis device according to claim 6, characterized in that: The device further comprises a removal assembly (8) connected to the positioning mechanism (7), the removal assembly (8) being used to drive the positioning mechanism (7) to remove the anastomosis assembly (6), the removal assembly (8) comprising a second pull rope (81) encircling the outer ring of the rotating ring (72), the outer ring of the rotating ring (72) being provided with a second groove, one end of the second pull rope (81) being fixedly connected to the second groove, the other end of the second pull rope (81) being fixedly connected to a removal button (82), the removal button (82) being slidably connected to a positioning ring (83), and a mounting frame (84) being fixedly connected between the positioning ring (83) and the handle (1).

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