One-key pressing type chest closed drainage tube body surface traction prevention fixator

Abstract

The invention relates to the technical field of medical instruments, and discloses a one-key pressing type thoracic cavity closed drainage tube body surface anti-traction fixator which comprises a hooping base, a hooping button penetrates through the upper surface of the hooping base and is in sliding connection with the hooping button, a groove is formed in the lower surface of the hooping base, a fixing mechanism is arranged on the inner surface of the groove, and the fixing mechanism is arranged on the inner surface of the hooping base. The fixing mechanism comprises an L-shaped clamping rod, the L-shaped clamping rod is in sliding connection with the inner surface of the groove, and the inner surface of the groove is fixedly connected with a limiting rod I. According to the one-key pressing type chest closed drainage tube body surface anti-traction fixator, by means of the arrangement of the L-shaped clamping rod and a movable block, when a banding button is installed on a banding base, the banding button can be clamped on the banding base, and the banding button can be fixed on the banding base; through mutual cooperation of the L-shaped clamping rod and the movable block, the hooping button can be limited, it is guaranteed that the hooping button is stably fixed to the hooping base, meanwhile, disassembly is convenient, and the phenomenon that the hooping button is disengaged when a part is dragged can be effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a one-button pressing type fixer for preventing the surface of a chest closed drainage tube from being pulled. Background Art

[0002] Temporary preventive ostomy is a common measure to prevent anastomotic leakage in colorectal tumor surgery. Its purpose is to drain the contents produced above the ileum out of the body to block the intestinal contents from descending to the anastomosis. However, preventive ostomy has disadvantages such as a long catheterization period, usually 3-6 months, and the need for a second reduction surgery, which also makes clinicians have many concerns when choosing this type of preventive surgery.

[0003] Chinese patent publication number CN 116115417 A discloses "an ileostomy tube assembly with leakage detection and body surface fixation, which not only solves the problem of anastomotic leakage, but also strengthens the fixation of the ileostomy tube body, catheter and connector and improves the comfort of patients during fixation. The key points of its technical solution are: an anti-leakage ileostomy tube, including a tube body, the interior of the tube body is hollow to form a drainage cavity, the top of the tube body is provided with an opening, the tube body is provided with a sealing balloon, the sealing balloon is wrapped on the outer wall of the tube body at the opening, the tube body is also provided with a detection balloon and a detection hole, the detection balloon is wrapped on the outer wall of the tube body, the detection balloon is located behind the sealing balloon, the detection hole is located between the detection balloon and the sealing balloon, the detection hole, the detection balloon and the sealing balloon are all connected with a catheter and a connector; it also includes a fixing structure, the fixing structure includes a fixing patch and a clamping assembly, the fixing patch has viscosity and can be adhered to the patient's body surface, and the clamping assembly is used to fix or separate from the tube body to limit the movement of the tube body."

[0004] During the conception process, the applicant searched a large number of patent documents on the patent network. For example, Chinese patent publication number CN116115417 A discloses "an ileostomy tube assembly with leakage detection and surface fixation". However, since most fixators are made by molds and most fixators are spliced ​​by threads, and the materials of the fixators are all plastic, after the fixers are spliced, the plastic material of the fixer parts will be detached when subjected to a large force after being connected by threads, and the threads will be damaged, greatly reducing the service life of the fixer. Therefore, a one-button press-type chest closed drainage tube surface anti-traction fixator is proposed to solve the above-mentioned problems. Summary of the invention

[0005] Technical issues solved In view of the deficiencies in the prior art, the present invention provides a one-button push-type anti-pulling fastener for closed chest drainage tubes on the body surface, which solves the problem that most plastic fastener components are connected by threads, and when subjected to large forces, the components are easily separated, and the internal threads are damaged, thereby reducing the service life of the fastener.

[0006] (II) Technical solution To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a one-button press-type chest closed drainage tube surface anti-pulling fixer, comprising a tightening base, the upper surface of the tightening base is penetrated by a tightening button and is slidably connected to the tightening button, the lower surface of the tightening base is provided with a groove, the inner surface of the groove is provided with a fixing mechanism, the fixing mechanism comprises an L-shaped clamping rod, the L-shaped clamping rod is slidably connected to the inner surface of the groove, the inner surface of the groove is fixedly connected with a limiting rod 1, the limiting rod 1 penetrates the L-shaped clamping rod and is slidably connected to the L-shaped clamping rod, the outer arc surface of the limiting rod 1 is sleeved with a spring 1, the inner surface of the groove is fixedly connected to one end of the spring 1, the L-shaped clamping rod is fixedly connected to the other end of the spring 1, the outer arc surface of the tightening button is provided with an L-shaped groove, and the inner surface of the L-shaped groove is slidably connected to the L-shaped clamping rod.

[0007] Preferably, the inner surface of the L-shaped groove passes through the limiting rod 2 and is slidably connected to the limiting rod 2, the inner surface of the L-shaped groove is slidably connected to a movable block, the limiting rod 2 is fixedly connected to the movable block, the outer arc surface of the limiting rod 2 is sleeved with a spring 2, the movable block is fixedly connected to one end of the spring 2, and the inner surface of the L-shaped groove is fixedly connected to the other end of the spring 2.

[0008] Preferably, the lower surface of the movable block is curved, the upper surface of the tightening base is provided with an annular groove, the upper surface of the tightening base is fixedly connected to a connecting seat, the upper surface of the tightening button is fixedly connected to a clamping rod in a circular array, and the outer arc surface of the clamping rod is curved.

[0009] Preferably, a clamping mechanism is provided on the outer arc surface of the tightening button, and the clamping mechanism includes a supporting ring seat, the inner arc surface of the supporting ring seat is fixedly connected to the outer arc surface of the tightening button, the outer arc surface of the supporting ring seat passes through a movable rod and is slidably connected to the movable rod, the left surface of the movable rod is fixedly connected to a U-shaped clamping plate, and the inner surface of the annular groove is slidably connected to a tightening cover.

[0010] Preferably, a slide groove is provided on the lower surface of the tightening button, and an adjustment plate is slidably connected to the inner surface of the slide groove. The adjustment plate is hinged to one end of the bracket one, and the U-shaped clamping plate is hinged to the other end of the bracket one.

[0011] Preferably, the inner surface of the tightening cover is slidably connected to the U-shaped clamping plate, and the inner surface of the tightening cover is slidably connected to the curved surface of the clamping rod.

[0012] Preferably, a clamping mechanism is provided on the upper surface of the clamping cover, and the clamping mechanism includes a clamping seat, an inner surface of the clamping seat is rotatably connected to a rotating plate, and an upper surface of the rotating plate is rotatably connected to a pulley.

[0013] Preferably, a connecting rod passes through the upper surface of the clamping seat and is slidably connected to the connecting rod, a spring three is sleeved on the outer arc surface of the connecting rod, the upper surface of the clamping seat is fixedly connected to one end of the spring three, the connecting rod is fixedly connected to the other end of the spring three, the connecting rod is hinged to one end of the bracket two, and the rotating plate is hinged to the other end of the bracket two.

[0014] Preferably, the lower surface of the tightening base is penetrated by a tube body and is slidably connected to the tube body, the tube body penetrates the tightening cover and is slidably connected to the tightening cover, the tube body penetrates the tightening button and is slidably connected to the tightening button, and the pulley is slidably connected to the outer arc surface of the tube body.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a one-button push-type chest closed drainage tube surface anti-pulling fixator, which has the following beneficial effects: 1. The one-button push-type chest closed drainage tube anti-pulling fixer utilizes the setting of an L-shaped clamp rod and a movable block. When the clamp button is installed on the clamp base, the L-shaped clamp rod and the movable block cooperate with each other to limit the clamp button, thereby ensuring that the clamp button is stably fixed on the clamp base. At the same time, it is convenient to disassemble and can effectively prevent the phenomenon of separation when the component is pulled.

[0016] 2. The one-button push-type chest closed drainage tube anti-pulling fixer utilizes the settings of the support ring seat, the annular groove, the tightening cover, the U-shaped clamping plate and the adjustment plate. When the tightening cover is fixed on the support ring seat, it can automatically limit the support ring seat. At the same time, by pulling the adjustment plate downward, the tightening cover can be released from the limit, so that the tightening cover and the tightening base can be easily disassembled.

[0017] 3. The one-button push-type chest closed drainage tube surface anti-pulling fixator can clamp the tube body at the same time by using the setting of connecting rod, clamping seat, spring three, rotating plate, pulley, clamping rod and tightening cover, and ensure that the tube body will not move after being inserted into the tightening base. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the one-button push-type chest closed drainage tube anti-pulling fixator proposed by the present invention; Figure 2 This is a schematic diagram of the overall top view of the clamping base of the one-button push-type chest closed drainage tube body surface anti-traction fixer proposed by the present invention; Figure 3 This is a schematic diagram of the overall upward structure of the clamping base of the one-button push-type chest closed drainage tube body surface anti-traction fixer proposed by the present invention; Figure 4 The one-button pressing type chest closed drainage tube anti-pulling fixator proposed by the present invention Figure 3 A schematic diagram of the structure enlargement of part A; Figure 5 This is a schematic diagram of the cross-sectional structure of the clamping base of the one-button push-type chest closed drainage tube body surface anti-traction fixer proposed by the present invention; Figure 6 This is a schematic diagram of the positional relationship between the clamping cover and the clamping rod of the one-button push-type chest closed drainage tube body surface anti-pulling fixer proposed by the present invention; Figure 7 The one-button pressing type chest closed drainage tube anti-pulling fixator proposed by the present invention Figure 6 A schematic diagram of the enlarged structure of part A.

[0019] In the figure: 1. tightening base; 2. tightening button; 3. groove; 4. fixing mechanism; 41. L-shaped clamping rod; 42. limit rod one; 43. spring one; 44. L-shaped groove; 45. limit rod two; 46. movable block; 47. spring two; 48. annular groove; 5. joint seat; 6. clamping rod; 7. clamping mechanism; 71. supporting ring seat; 72. movable rod; 73. U-shaped clamping plate; 74. tightening cover; 75. slide groove; 76. adjustment plate; 77. bracket one; 8. clamping mechanism; 81. clamping seat; 82. rotating plate; 83. pulley; 84. connecting rod; 85. spring three; 86. bracket two; 9. tube body. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 7The one-button push-type chest closed drainage tube anti-pulling fixer comprises a clamping base 1, the upper surface of the clamping base 1 is penetrated by a clamping button 2 and is slidably connected with the clamping button 2, the lower surface of the clamping base 1 is provided with a groove 3, the inner surface of the groove 3 is provided with a fixing mechanism 4, the fixing mechanism 4 comprises an L-shaped clamping rod 41, the L-shaped clamping rod 41 is slidably connected with the inner surface of the groove 3, the inner surface of the groove 3 is fixedly connected with a limiting rod 1 42, the L-shaped clamping rod 41 is limited by the groove 3 and the limiting rod 1 42 at the same time, so as to effectively ensure that the L-shaped clamping rod 41 slides stably in the groove 3, the limiting rod 1 42 penetrates the L-shaped clamping rod 41 and is slidably connected with the L-shaped clamping rod 41, the outer arc surface of the limiting rod 1 42 is sleeved with a spring 1 43, the inner surface of the groove 3 and the spring 1 43 are connected to the inner surface of the groove 3. One end of the spring 1 43 is fixedly connected, and the L-shaped clamping rod 41 is fixedly connected to the other end of the spring 1 43. An L-shaped groove 44 is provided on the outer arc surface of the tightening button 2. Through the mutual cooperation of the opened L-shaped groove 44 and the L-shaped clamping rod 41, after the L-shaped clamping rod 41 is partially parallel to the inner surface of the L-shaped groove 44, the L-shaped clamping rod 41 will be clamped on the upper part of the inner surface of the L-shaped groove 44 through the elastic force of the spring 1 43. Through this arrangement, the tightening button 2 is limited, and the inner surface of the L-shaped groove 44 is slidably connected to the L-shaped clamping rod 41. The inner surface of the L-shaped groove 44 passes through the limiting rod 2 45 and is slidably connected to the limiting rod 2 45. Through the mutual cooperation of the L-shaped groove 44 and the limiting rod 2 45, the movable block 46 is limited at the same time, so that the movable block 46 is stably in the L-shaped groove 44 The lower part of the surface slides, and at the same time, the movable block 46 cooperates with the L-shaped clamping rod 41. When the tightening button 2 is inserted into the upper surface of the tightening base 1, the L-shaped clamping rod 41 will be stuck in the upper part of the inner surface of the L-shaped groove 44. The inner surface of the L-shaped groove 44 is slidably connected with a movable block 46, and the limiting rod 45 is fixedly connected to the movable block 46. The outer arc surface of the limiting rod 45 is sleeved with a spring 47, and the movable block 46 is fixedly connected to one end of the spring 47. The inner surface of the L-shaped groove 44 is fixedly connected to the other end of the spring 47. The lower surface of the movable block 46 is a curved surface. Through the lower surface of the movable block 46 is a curved surface, when the tightening button 2 is inserted into the tightening base 1, the curved surface of the movable block 46 will be squeezed by the L-shaped clamping rod 41 and shrink into the L-shaped groove 44. At the same time, the L-shaped clamping rod When 41 is stuck in the upper part of the inner surface of the L-shaped groove 44, the L-shaped clamping rod 41 is limited by the movable block 46 to ensure that the tightening button 2 is stably stuck in the tightening base 1, so that the tightening base 1 and the tightening button 2 are more stable. An annular groove 48 is opened on the upper surface of the tightening base 1, and a joint seat 5 is fixedly connected to the upper surface of the tightening base 1. The upper surface of the tightening button 2 is fixedly connected with a clamping rod 6 in a circumferential array. The outer arc surface of the clamping rod 6 is a curved surface. A clamping mechanism 7 is provided on the outer arc surface of the tightening button 2. The clamping mechanism 7 includes a support ring seat 71. The inner arc surface of the support ring seat 71 is fixedly connected to the outer arc surface of the tightening button 2. The outer arc surface of the support ring seat 71 is penetrated by a movable rod 72 and is slidably connected to the movable rod 72. The left surface of the movable rod 72 is fixedly connected with a U-shaped clamping plate 73.The movable rod 72 is sleeved with a spring four, one end of which is fixed to the U-shaped card plate 73, and the other end is fixed to the outer arc surface of the support ring seat 71. The inner surface of the annular groove 48 is slidably connected with a tightening cover 74, and a sliding groove 75 is provided on the lower surface of the tightening button 2. The inner surface of the sliding groove 75 is slidably connected with an adjusting plate 76. The adjusting plate 76 is limited by the opened sliding groove 75, which can effectively ensure that the adjusting plate 76 slides stably in the sliding groove 75. The adjusting plate 76 is hinged to one end of the bracket 77, and the U-shaped card plate 73 is hinged to the other end of the bracket 77. The inner surface of the tightening cover 74 is slidably connected to the U-shaped card plate 73. The inner surface is slidably connected with the curved surface of the clamping rod 6. When the clamping cover 74 is installed on the clamping base 1, it will squeeze the curved surface of the clamping rod 6, so that multiple groups of clamping rods 6 will shrink toward the center of the clamping base 1 at the same time to clamp the tube body 9. At the same time, the fixing mechanism 4 and the clamping mechanism 7 are both provided with two groups, and they are symmetrically arranged with the center line of the clamping base 1 as the symmetry axis. The L-shaped clamping rod 41, the movable block 46, the support ring seat 71, the annular groove 48, the clamping cover 74, the U-shaped clamping plate 73 and the adjustment plate 76 can effectively prevent the phenomenon of separation when the parts are pulled, and at the same time, the clamping cover 74 and the clamping base 1 can be easily disassembled; The upper surface of the clamping cover 74 is provided with a clamping mechanism 8, which includes a clamping seat 81, the inner surface of the clamping seat 81 is rotatably connected with a rotating plate 82, the upper surface of the rotating plate 82 is rotatably connected with a pulley 83, the upper surface of the clamping seat 81 is penetrated by a connecting rod 84 and is slidably connected with the connecting rod 84, the outer arc surface of the connecting rod 84 is sleeved with a spring 3 85, the upper surface of the clamping seat 81 is fixedly connected to one end of the spring 3 85, the connecting rod 84 is fixedly connected to the other end of the spring 3 85, the connecting rod 84 is hinged to one end of the bracket 2 86, and the rotating plate 82 It is hinged with the other end of the bracket 2 86, and the lower surface of the tightening base 1 is penetrated by a tube body 9 and is slidably connected to the tube body 9, the tube body 9 penetrates the tightening cover 74 and is slidably connected to the tightening cover 74, the tube body 9 penetrates the tightening button 2 and is slidably connected to the tightening button 2, and the pulley 83 is slidably connected to the outer arc surface of the tube body 9. By utilizing the arrangement of the connecting rod 84, the clamping seat 81, the spring three 85, the rotating plate 82, the pulley 83, the clamping rod 6 and the tightening cover 74, the tube body 9 can be clamped at the same time, and after the tube body 9 is inserted into the tightening base 1, it is ensured that the tube body 9 will not move.

[0022] Working principle: when the entire fixing device needs to be spliced, the tightening button 2 is inserted into the tightening base 1. When the tightening button 2 enters the tightening base 1, the curved surface of the movable block 46 is squeezed by the L-shaped clamping rod 41. At the same time, the elastic force of the spring 1 43 is greater than the elastic force of the spring 2 47. After being stressed, the movable block 46 drives the limiting rod 2 45 to shrink into the L-shaped groove 44. At the same time, it will resist the L-shaped clamping rod 41 from rebounding into the lower part of the inner surface of the L-shaped groove 44 due to the elastic force of the spring 1 43. At the same time, the L-shaped clamping rod 41 After being partially parallel to the inner surface of the L-shaped groove 44, the spring 1 43 is pushed into the L-shaped groove 44, and the movable block 46 is extended out of the L-shaped groove 44 by the elastic force of the spring 2 47. The L-shaped clamping rod 41 is clamped in the L-shaped groove 44 through the upper surface plane of the movable block 46 and the upper surface plane of the L-shaped groove 44, thereby limiting the clamping button 2. When it is necessary to disassemble, the movable block 46 can be pushed into the L-shaped groove 44. After the clamping button 2 is installed, the tube body 9 is inserted into the clamping button 2 and the clamping base 1. The locking cam 74 is pressed against the locking cam 73 to lock the locking cam 73 in the locking cam 76. The locking cam 73 is pressed against the locking cam 76 and the locking cam 76 is engaged with the first and second locking cams 76. The locking cam 73 is pressed against the locking cam 76 to lock the locking cam 76. The adjusting plate 76 is moved, and the adjusting plate 76 pulls the U-shaped clamping plate 73 to move outward through the bracket 1 77. After it is no longer in close contact with the inner surface of the tightening cover 74, the tightening cover 74 can be removed from the tightening base 1. When the tightening cover 74 is installed on the tightening base 1, it will squeeze the curved surface of the clamping rod 6, so that the clamping rod 6 will clamp the tube body 9. When the tube body 9 passes through the tightening cover 74, the elastic force of the spring three 85 cooperates with the bracket two 86 to make the rotating plate 82 drive the pulley 83 to be in close contact with the tube body 9, so as to prevent the tube body 9 from slipping and affecting the installation efficiency.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A one-button push-type chest closed drainage tube anti-pulling fixator, comprising a clamping base (1), characterized in that: The upper surface of the tightening base (1) is penetrated by a tightening button (2) and is slidably connected to the tightening button (2); the lower surface of the tightening base (1) is provided with a groove (3); the inner surface of the groove (3) is provided with a fixing mechanism (4); the fixing mechanism (4) comprises an L-shaped clamping rod (41); the L-shaped clamping rod (41) is slidably connected to the inner surface of the groove (3); the inner surface of the groove (3) is fixedly connected to a limiting rod (42); the limiting rod (42) 2) penetrates the L-shaped clamping rod (41) and is slidably connected to the L-shaped clamping rod (41), the outer arc surface of the limit rod (42) is sleeved with a spring (43), the inner surface of the groove (3) is fixedly connected to one end of the spring (43), the L-shaped clamping rod (41) is fixedly connected to the other end of the spring (43), the outer arc surface of the tightening button (2) is provided with an L-shaped groove (44), and the inner surface of the L-shaped groove (44) is slidably connected to the L-shaped clamping rod (41).

2. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 1, characterized in that: The inner surface of the L-shaped groove (44) passes through the second limiting rod (45) and is slidably connected to the second limiting rod (45); the inner surface of the L-shaped groove (44) is slidably connected to a movable block (46); the second limiting rod (45) is fixedly connected to the movable block (46); the outer arc surface of the second limiting rod (45) is sleeved with a second spring (47); the movable block (46) is fixedly connected to one end of the second spring (47); and the inner surface of the L-shaped groove (44) is fixedly connected to the other end of the second spring (47).

3. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 2, characterized in that: The lower surface of the movable block (46) is a curved surface, the upper surface of the clamping base (1) is provided with an annular groove (48), the upper surface of the clamping base (1) is fixedly connected to a joint seat (5), the upper surface of the clamping button (2) is fixedly connected to a clamping rod (6) in a circular array, and the outer arc surface of the clamping rod (6) is a curved surface.

4. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 3, characterized in that: The outer arc surface of the clamping button (2) is provided with a clamping mechanism (7), and the clamping mechanism (7) comprises a support ring seat (71), the inner arc surface of the support ring seat (71) is fixedly connected to the outer arc surface of the clamping button (2), the outer arc surface of the support ring seat (71) is penetrated by a movable rod (72) and is slidably connected to the movable rod (72), the left surface of the movable rod (72) is fixedly connected to a U-shaped clamping plate (73), and the inner surface of the annular groove (48) is slidably connected to a clamping cover (74).

5. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 4, characterized in that: The lower surface of the clamping button (2) is provided with a slide groove (75), the inner surface of the slide groove (75) is slidably connected with an adjustment plate (76), the adjustment plate (76) is hinged to one end of the bracket (77), and the U-shaped clamping plate (73) is hinged to the other end of the bracket (77).

6. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 5, characterized in that: The inner surface of the tightening cover (74) is slidably connected to the U-shaped clamping plate (73), and the inner surface of the tightening cover (74) is slidably connected to the curved surface of the clamping rod (6).

7. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 6, characterized in that: A clamping mechanism (8) is provided on the upper surface of the clamping cover (74), the clamping mechanism (8) comprising a clamping seat (81), the inner surface of the clamping seat (81) being rotatably connected to a rotating plate (82), and the upper surface of the rotating plate (82) being rotatably connected to a pulley (83).

8. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 7, characterized in that: A connecting rod (84) passes through the upper surface of the clamping seat (81) and is slidably connected to the connecting rod (84); a spring three (85) is sleeved on the outer arc surface of the connecting rod (84); the upper surface of the clamping seat (81) is fixedly connected to one end of the spring three (85); the connecting rod (84) is fixedly connected to the other end of the spring three (85); the connecting rod (84) is hinged to one end of the bracket two (86); and the rotating plate (82) is hinged to the other end of the bracket two (86).

9. The one-button push-type chest closed drainage tube anti-pulling fixator according to claim 8, characterized in that: The lower surface of the tightening base (1) is penetrated by a tube body (9) and is slidably connected to the tube body (9); the tube body (9) penetrates the tightening cover (74) and is slidably connected to the tightening cover (74); the tube body (9) penetrates the tightening button (2) and is slidably connected to the tightening button (2); and the pulley (83) is slidably connected to the outer arc surface of the tube body (9).

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