Anti-slip urinary catheter fixing device
By using a water-filled balloon to position the catheter head and binding it with a magnetic anti-pressure ring, the problem of unstable fixation of the urinary catheter was solved, achieving stable catheter fixation and smooth urine drainage, thus improving the patient's treatment safety and comfort.
Patent Information
- Application Number
- CN202511751745.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-02-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing methods of fixing urinary catheters are prone to loosening during patients' daily activities, leading to catheter detachment, urethral injury, and obstruction of drainage, which affects treatment safety and comfort.
The catheter is stably fixed and supported by an anti-pressure component and a positioning component. The catheter tip is positioned by an inflatable balloon, and the catheter is fixed by a magnetic anti-pressure ring and a binding strap.
It effectively prevents catheter slippage, reduces urethral damage, ensures smooth urine drainage, and improves treatment safety and comfort.
Smart Images
Figure CN121490243A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of urinary catheter technology, and in particular to a urinary catheter fixation device to prevent slippage. Background Technology
[0002] In clinical treatment of indwelling urinary catheters, the reliability of catheter fixation directly affects patient safety and comfort. Existing catheter fixation methods have many shortcomings and fail to meet actual clinical needs. During catheterization, daily activities such as limb pulling and turning can easily loosen the fixation structure, leading to catheter detachment. This not only interrupts urine drainage but may also cause urethral mucosal damage, increasing the risk of infection. Furthermore, unintentional pulling on the catheter is common, directly causing mechanical irritation and damage to the urethral wall, exacerbating patient discomfort and affecting treatment progress. In addition, existing fixation methods lack effective catheter protection. When patients are lying down or active, the catheter is easily compressed by the body, obstructing urine flow, affecting drainage effectiveness, and potentially leading to complications due to poor drainage. These problems not only reduce the safety and convenience of clinical nursing but also adversely affect patient recovery. Summary of the Invention
[0003] The main objective of this invention is to provide an anti-slip urinary catheter fixation device, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A urinary catheter fixation device for preventing slippage includes a urinary catheter body. One end of the urinary catheter body is fixedly provided with a urine bag interface, and the other end is fixedly provided with a catheter sleeve. The catheter sleeve has a catheter port. An anti-pressure component is provided on the outer side of the urinary catheter body. A positioning component is provided on one side of the anti-pressure component. Three sets of binding components are provided on the front side of the anti-pressure component. The anti-pressure component includes two sets of limiting rings fixedly provided on the outer side of the urinary catheter body. Several sets of anti-pressure rings are fitted on the outer side of the urinary catheter body at the position of one set of limiting rings. An annular groove is provided on the inner side of the anti-pressure ring. A movable ring is fitted on the inner side of the annular groove. A threaded sleeve is fixedly provided on the outer side of the movable ring. Magnetic ring grooves are provided at both ends of the anti-pressure ring. Magnetic ring plates are fixedly provided on the inner side of the magnetic ring grooves. Two sets of connecting ropes are fixedly provided on the front and rear sides of the several sets of anti-pressure rings.
[0005] Preferably, the positioning component includes a movable sleeve fixedly disposed near a set of anti-pressure rings near the urine bag interface. A fixing ring is fixedly disposed at one end of the movable sleeve. Four sets of square openings are opened on the inner side of the movable sleeve. Positioning springs are fixedly disposed on the inner side of each of the four sets of square openings. Positioning buckles are fixedly disposed on one side of each of the four sets of positioning springs. A control ring is fitted on the inner side of the four sets of positioning springs on the outer side of the movable sleeve. A handle ring is fixedly disposed on one side of the control ring. Notches are opened on the outer side of the handle ring corresponding to the positions of the four sets of positioning springs. The bottom of the inner side of each of the four sets of notches is set as an arc slope.
[0006] Preferably, the binding assembly includes a threaded shaft threaded to the inside of a set of threaded sleeves, a fixing plate fixedly disposed at the front end of the threaded shaft, a binding strap disposed at the front end of the fixing plate, four sets of fixing pins fixedly disposed on the inner side of the binding strap and the fixing plate, and two sets of Velcro fixedly disposed on the front side of the binding strap.
[0007] Preferably, a water injection tube is fixedly installed on one side of the urinary catheter body near the urine bag interface, a water injection valve is fixedly installed on one side of the water injection tube, a water injection cavity is provided on the inner side of the urinary catheter body, a water injection port is opened on one side of the water injection cavity near the urine guide head, and a water injection balloon is fixedly installed on the outer side of the urinary catheter body at the water injection port.
[0008] Preferably, the several groups of anti-pressure rings are evenly distributed laterally, and adjacent anti-pressure rings in the several groups of anti-pressure rings are magnetically connected together by magnetic ring plates. The several groups of connecting ropes respectively fix the several adjacent groups of anti-pressure rings and fix them to a set of limiting rings that fit together.
[0009] Preferably, the movable sleeve is movably sleeved on the outside of the urinary catheter body, the square opening is adapted to the positioning spring to move inside, the positioning spring is inclined and made of elastic material, the positioning spring is correspondingly set inside the notch, one end of the positioning spring is fixedly set on the inner wall of the square opening, the positioning buckle is arc-shaped on one side, the outer surface of the control ring is inclined, and the arc-shaped slope fits against the positioning spring.
[0010] Preferably, the threaded shaft is adapted to the threaded sleeves on several sets of movable rings, the four sets of fixing pins fix the binding strap and the fixing piece together, and the two sets of Velcro are glued together.
[0011] Preferably, the water injection pipe, water injection cavity, and urinary catheter body are interconnected, and the water injection balloon is positioned outside the water injection port.
[0012] Compared with the prior art, the present invention has the following beneficial effects: The catheter tip is inserted into the patient's urethra and into the bladder. Water is then injected into the injection tube and the injection chamber through the injection valve. The water is then introduced into the injection balloon through the injection chamber and the injection port. The incoming liquid causes the injection balloon to inflate, and the inflated injection balloon positions the catheter tip in the bladder, preventing the catheter tip from slipping out of the bladder and affecting the patient's drainage. By gripping the handle, a set of anti-pressure rings is moved away from the limiting ring. Several sets of anti-pressure rings are fixedly connected by connecting ropes. So, after the anti-pressure rings are moved a certain distance, the next set of anti-pressure rings is pulled by the fixed connecting ropes, thus evenly distributing the magnetically connected anti-pressure rings on the outside of the urinary catheter body. The several sets of anti-pressure rings evenly distributed on the outside of the urinary catheter body provide support, preventing the legs from being easily pressed against the outside of the urinary catheter body, which would affect the normal drainage function of the urinary catheter body. Secondly, when not in use, the magnetic rings fixed on both sides of the several sets of anti-pressure rings can attract the several sets of anti-pressure rings together, preventing the several sets of anti-pressure rings from moving around randomly. When the handle ring moves the anti-pressure assembly towards a set of limiting rings further away, the four sets of positioning buckles come into contact with the limiting rings. Since one side of each of the four sets of positioning buckles is arc-shaped, the four sets of positioning buckles and the four sets of positioning springs are pushed out. Then, after the four sets of positioning buckles move to one side of the limiting rings, the elastic action of the four sets of positioning springs causes the four sets of positioning buckles to lock onto the limiting rings, thus positioning the evenly distributed anti-pressure rings and preventing the anti-pressure rings from being ineffectively distributed on the outside of the urinary catheter body for support. By pushing the handle ring to one side of the square opening, the four sets of arc-shaped slopes will push the four sets of positioning springs out, thus releasing the four sets of positioning buckles from the limiting rings. For several evenly distributed sets of threaded sleeves, three sets of threaded shafts are connected to their threads, and then the binding strap is wrapped around the leg. It is then fixed with two sets of Velcro, so that the main body of the urinary catheter is fitted and positioned on the leg, avoiding the urinary catheter head from being pulled or other factors that could cause damage to the patient's urethra. The movable ring and the anti-pressure ring are designed to rotate, making it easy to bind the binding strap to the other leg. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall docking structure of an anti-slip urinary catheter fixation device according to the present invention; Figure 2 This is a partial cross-sectional view of the main body of the urinary catheter of the present invention, which is a urinary catheter fixation device for preventing slippage. Figure 3 This invention relates to an anti-slip urinary catheter fixation device. Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This is a schematic diagram of the anti-pressure component and positioning component of the anti-slip urinary catheter fixation device of the present invention; Figure 5 This is a schematic diagram of the anti-pressure component and partially unfolded structure of an anti-slip urinary catheter fixation device according to the present invention; Figure 6 This is a schematic diagram of the positioning component structure of an anti-slip urinary catheter fixation device according to the present invention; Figure 7 This is a partial cross-sectional view of the positioning component of the anti-slip urinary catheter fixation device of the present invention; Figure 8 This is a schematic diagram of the binding assembly structure of an anti-slip urinary catheter fixation device according to the present invention; Figure 9 This invention relates to an anti-slip urinary catheter fixation device. Figure 8 Enlarged structural diagram of section B.
[0014] In the diagram: 1. Main body of urinary catheter; 2. Urine bag interface; 3. Catheter head; 4. Catheter port; 5. Anti-pressure component; 51. Limiting ring; 52. Anti-pressure ring; 53. Annular groove; 54. Movable ring; 55. Threaded sleeve; 56. Magnetic ring groove; 57. Magnetic ring plate; 58. Connecting rope; 6. Positioning component; 61. Movable sleeve; 62. Fixed ring; 63. Square opening; 64. Positioning spring; 65. Positioning buckle; 66. Control ring; 67. Handle ring; 68. Notch; 69. Arc-shaped slope; 7. Binding component; 71. Threaded shaft; 72. Fixing plate; 73. Binding strap; 74. Fixing nail; 75. Velcro; 8. Injection tube; 9. Injection valve; 10. Injection chamber; 11. Injection port; 12. Injection airbag. Detailed Implementation
[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0016] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0017] Please see Figures 1-9One embodiment of the present invention provides a urinary catheter fixation device for preventing slippage, comprising a urinary catheter body 1, a urine bag interface 2 fixedly disposed at one end of the urinary catheter body 1, a catheter head 3 fixedly disposed at the other end of the urinary catheter body 1, a catheter port 4 opened on the catheter head 3, an anti-pressure component 5 disposed on the outside of the urinary catheter body 1, a positioning component 6 disposed on one side of the anti-pressure component 5, and three sets of binding components 7 disposed on the front side of the anti-pressure component 5. The anti-pressure component 5 includes a fixedly disposed urinary catheter body... Two sets of limiting rings 51 are located on the outer side of the catheter body 1. Several sets of anti-pressure rings 52 are fitted on the outer side of the urinary catheter body 1 at the position of one set of limiting rings 51. An annular groove 53 is opened on the inner side of the anti-pressure ring 52. A movable ring 54 is fitted on the inner side of the annular groove 53. A threaded sleeve 55 is fixedly installed on the outer side of the movable ring 54. Magnetic ring grooves 56 are opened at both ends of the anti-pressure ring 52. Magnetic ring plates 57 are fixedly installed on the inner side of the magnetic ring grooves 56. Two sets of connecting ropes 58 are fixedly installed on the front and rear sides of the several sets of anti-pressure rings 52.
[0018] Several sets of anti-pressure rings 52 are evenly distributed laterally. Adjacent anti-pressure rings 52 in several sets of anti-pressure rings 52 are magnetically connected together by magnetic ring pieces 57. Several sets of connecting ropes 58 respectively fix the adjacent sets of anti-pressure rings 52 and fix them to a set of limiting rings 51 that fit together.
[0019] By gripping the handle 67, a set of anti-pressure rings 52 connected to the handle 67 are moved toward a position away from the limiting ring 51. Several sets of anti-pressure rings 52 are fixedly connected to each other by connecting ropes 58. So after pulling the anti-pressure rings 52 to a certain distance, the next set of anti-pressure rings 52 is pulled by the fixedly connected connecting ropes 58, thereby evenly distributing the magnetically connected anti-pressure rings 52 on the outside of the urinary catheter body 1. The several sets of anti-pressure rings 52 evenly distributed on the outside of the urinary catheter body 1 can provide support and prevent the legs from being easily pressed on the outside of the urinary catheter body 1, which would affect the normal drainage of the urinary catheter body 1. Secondly, when not in use, the magnetic rings 57 fixed on both sides of the several sets of anti-pressure rings 52 can attract the several sets of anti-pressure rings 52 together and prevent the several sets of anti-pressure rings 52 from moving randomly.
[0020] The positioning component 6 includes a movable sleeve 61 fixedly disposed near a set of anti-pressure rings 52 of the urine bag interface 2. A fixed ring 62 is fixedly disposed at one end of the movable sleeve 61. Four sets of square openings 63 are opened on the inner side of the movable sleeve 61. Positioning springs 64 are fixedly disposed on the inner side of each of the four sets of square openings 63. Positioning buckles 65 are fixedly disposed on one side of each of the four sets of positioning springs 64. A control ring 66 is fitted on the inner side of the four sets of positioning springs 64 on the outer side of the movable sleeve 61. A handle ring 67 is fixedly disposed on one side of the control ring 66. Notches 68 are opened on the outer side of the handle ring 67 corresponding to the positions of the four sets of positioning springs 64. The bottom of the inner side of each of the four sets of notches 68 is set as an arc-shaped slope 69.
[0021] The movable sleeve 61 is movably sleeved on the outside of the urinary catheter body 1. The square opening 63 is adapted to the positioning spring 64 and moves inside. The positioning spring 64 is inclined and made of elastic material. The positioning spring 64 is correspondingly set inside the notch 68. One end of the positioning spring 64 is fixedly set on the inner wall of the square opening 63. The positioning buckle 65 is arc-shaped on one side. The outer surface of the control ring 66 is inclined. The arc slope 69 fits with the positioning spring 64.
[0022] When the handle 67 moves the anti-pressure component 5 toward a set of limiting rings 51 that are further away, the four sets of positioning buckles 65 come into contact with the limiting rings 51. Since the side of the four sets of positioning buckles 65 is arc-shaped, the four sets of positioning buckles 65 and the four sets of positioning springs 64 are pushed and unfolded. Then, after the four sets of positioning buckles 65 move to one side of the limiting rings 51, under the elastic action of the four sets of positioning springs 64, the four sets of positioning buckles 65 are fastened to the limiting rings 51, thereby positioning the evenly distributed sets of anti-pressure rings 52 and preventing the sets of anti-pressure rings 52 from not being effectively distributed on the outside of the urinary catheter body 1 for support. By pushing the square opening 63 to one side with the handle 67, the four sets of arc-shaped slopes 69 will push the four sets of positioning springs 64 to unfold, thus releasing the four sets of positioning buckles 65 from the limiting rings 51.
[0023] The binding assembly 7 includes a threaded shaft 71 threadedly connected to the inside of a set of threaded sleeves 55. A fixing plate 72 is fixedly provided at the front end of the threaded shaft 71. A binding strap 73 is provided at the front end of the fixing plate 72. Four sets of fixing pins 74 are fixedly provided on the inner side of the binding strap 73 and the fixing plate 72. Two sets of Velcro straps 75 are fixedly provided on the front side of the binding strap 73.
[0024] The threaded shaft 71 is adapted to the threaded sleeves 55 on several sets of movable rings 54, four sets of fixing pins 74 fix the binding strap 73 and the fixing piece 72 together, and two sets of Velcro 75 are attached together.
[0025] 2. For several evenly distributed sets of threaded sleeves 55, three sets of threaded shafts 71 are connected to them by threads, and then the binding strap 73 is wrapped around the leg. Then, it is fixed by two sets of Velcro 75 to fix it, so that the urinary catheter body 1 is attached and positioned on the leg to avoid the urinary catheter head 3 being pulled or affected, causing damage to the patient's urethra. The movable ring 54 and the anti-pressure ring 52 are rotatable, so that the binding strap 73 can be tied to the other leg.
[0026] A water injection tube 8 is fixedly installed on one side of the urinary catheter body 1 near the urine bag interface 2. A water injection valve 9 is fixedly installed on one side of the water injection tube 8. A water injection chamber 10 is provided on the inner side of the urinary catheter body 1. A water injection port 11 is opened on one side of the water injection chamber 10 near the urine guide head 3. A water injection balloon 12 is fixedly installed on the outer side of the urinary catheter body 1 at the water injection port 11.
[0027] The water injection tube 8, water injection cavity 10, and urinary catheter body 1 are internally connected, and the water injection balloon 12 covers the outside of the water injection port 11.
[0028] The catheter tip 3 is inserted into the patient's urethra and into the bladder. Water is then injected into the water inlet tube 8 and the water inlet chamber 10 through the water inlet valve 9. The water is then introduced into the water inlet balloon 12 through the water inlet chamber 10 and the water inlet 11. The incoming liquid causes the water inlet balloon 12 to inflate. The inflated water inlet balloon 12 positions the catheter tip 3 in the bladder, preventing the catheter tip 3 from slipping out of the bladder and affecting the patient's drainage.
[0029] Working principle: In use, the catheter tip 3 is inserted into the patient's urethra and into the bladder. Water is then injected into the water inlet tube 8 and water inlet chamber 10 through the water inlet valve 9. The water is then introduced into the water inlet balloon 12 through the water inlet chamber 10 and water inlet 11. The incoming liquid inflates the water inlet balloon 12, which positions the catheter tip 3 in the bladder, preventing it from slipping out and affecting the patient's drainage. Additionally, by gripping the handle ring 67, a set of anti-pressure rings 52 is moved away from the limiting ring 51. These anti-pressure rings 52 are interconnected by connecting ropes 58, so pulling the anti-pressure rings... After the pressure ring 52 moves a certain distance, the next set of anti-pressure rings 52 is pulled by the fixed connecting rope 58, thereby evenly distributing the magnetically connected anti-pressure rings 52 on the outer side of the urinary catheter body 1. The several sets of anti-pressure rings 52 evenly distributed on the outer side of the urinary catheter body 1 provide support, preventing the legs from being easily pressed against the outer side of the urinary catheter body 1, thus affecting the normal drainage function of the urinary catheter body 1. Furthermore, when not in use, the magnetic rings 57 fixedly installed on both sides of the several sets of anti-pressure rings 52 can attract the several sets of anti-pressure rings 52 together, preventing them from moving randomly; and through... When the handle 67 moves the anti-pressure component 5 towards a set of limiting rings 51 that are further away, the four sets of positioning buckles 65 come into contact with the limiting rings 51. Since one side of each of the four sets of positioning buckles 65 is arc-shaped, the four sets of positioning buckles 65 and the four sets of positioning springs 64 are pushed open. Then, after the four sets of positioning buckles 65 move to one side of the limiting rings 51, under the elastic action of the four sets of positioning springs 64, the four sets of positioning buckles 65 are secured to the limiting rings 51, thus positioning the evenly distributed anti-pressure rings 52. This prevents the anti-pressure rings 52 from being ineffectively distributed on the outside of the urinary catheter body 1 for support. Pushing the square opening 63 to one side with the wristband 67 will push the four sets of positioning springs 64 to unfold, allowing the four sets of positioning buckles 65 to be released from the limiting ring 51. Finally, for the evenly distributed sets of threaded sleeves 55, the three sets of threaded shafts 71 are connected to their threads, and the binding strap 73 is wrapped around the leg and then fixed with two sets of Velcro 75 to fit and position the urinary catheter body 1 on the leg, avoiding the urinary catheter head 3 from being pulled or otherwise damaged, causing damage to the patient's urethra. The movable ring 54 and the anti-pressure ring 52 are rotatable, making it convenient for the binding strap 73 to be tied to the other leg.
[0030] The urinary catheter body 1, urine bag interface 2, water injection tube 8, water injection hard valve 9, and water injection balloon 12 in this invention are common knowledge in the field, and their working principle is already well-known technology. The appropriate model is selected according to actual use, so it will not be explained in detail.
[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for fixing a urinary catheter to prevent slippage, comprising a urinary catheter body (1), characterized in that: One end of the urinary catheter body (1) is fixedly provided with a urine bag interface (2), and the other end of the urinary catheter body (1) is fixedly provided with a catheter head (3). The catheter head (3) has a catheter port (4). An anti-pressure component (5) is provided on the outside of the urinary catheter body (1). A positioning component (6) is provided on one side of the anti-pressure component (5). Three sets of binding components (7) are provided on the front side of the anti-pressure component (5). The anti-pressure component (5) includes two sets of limiting rings (51) fixedly provided on the outside of the urinary catheter body (1). A number of anti-pressure rings (52) are fitted on the outer side of the main body (1) of the urinary catheter at the position of a set of limiting rings (51). An annular groove (53) is opened on the inner side of the anti-pressure ring (52). A movable ring (54) is fitted on the inner side of the annular groove (53). A threaded sleeve (55) is fixedly installed on the outer side of the movable ring (54). A magnetic ring groove (56) is opened at both ends of the anti-pressure ring (52). A magnetic ring plate (57) is fixedly installed on the inner side of the magnetic ring groove (56). Two sets of connecting ropes (58) are fixedly installed on the front and rear sides of the number of anti-pressure rings (52).
2. The anti-slip urinary catheter fixation device according to claim 1, characterized in that: The positioning component (6) includes a movable sleeve (61) fixedly disposed on a set of anti-pressure rings (52) near the urine bag interface (2). A fixed ring (62) is fixedly disposed on one end of the movable sleeve (61). Four sets of square openings (63) are opened on the inner side of the movable sleeve (61). Positioning springs (64) are fixedly disposed on the inner side of each of the four sets of square openings (63). Positioning buckles (65) are fixedly disposed on one side of each of the four sets of positioning springs (64). A control ring (66) is sleeved on the inner side of the four sets of positioning springs (64) on the outer side of the movable sleeve (61). A handle ring (67) is fixedly disposed on one side of the control ring (66). A notch (68) is opened on the outer side of the handle ring (67) corresponding to the position of each of the four sets of positioning springs (64). The bottom of the inner side of each of the four sets of notches (68) is set as an arc slope (69).
3. The anti-slip urinary catheter fixation device according to claim 2, characterized in that: The binding assembly (7) includes a threaded shaft (71) threadedly connected to the inside of a set of threaded sleeves (55). A fixing plate (72) is fixedly provided at the front end of the threaded shaft (71). A binding strap (73) is provided at the front end of the fixing plate (72). Four sets of fixing nails (74) are fixedly provided on the inner side of the binding strap (73) and the fixing plate (72). Two sets of Velcro (75) are fixedly provided on the front side of the binding strap (73).
4. The anti-slip urinary catheter fixation device according to claim 3, characterized in that: A water injection tube (8) is fixedly installed on one side of the urinary catheter body (1) near the urine bag interface (2). A water injection hard valve (9) is fixedly installed on one side of the water injection tube (8). A water injection chamber (10) is provided on the inner side of the urinary catheter body (1). A water injection port (11) is opened on one side of the water injection chamber (10) near the urine guide head (3). A water injection balloon (12) is fixedly installed on the outer side of the urinary catheter body (1) at the water injection port (11).
5. The anti-slip urinary catheter fixation device according to claim 1, characterized in that: Several sets of anti-pressure rings (52) are evenly distributed laterally. Adjacent anti-pressure rings (52) in several sets of anti-pressure rings (52) are magnetically connected together by magnetic ring pieces (57). Several sets of connecting ropes (58) respectively fix the adjacent sets of anti-pressure rings (52) and fix them to a set of limiting rings (51) that fit together.
6. The anti-slip urinary catheter fixation device according to claim 2, characterized in that: The movable sleeve (61) is movably sleeved on the outside of the urinary catheter body (1). The square opening (63) is adapted to the positioning spring (64) to move inside. The positioning spring (64) is inclined and made of elastic material. The positioning spring (64) is correspondingly set inside the notch (68). One end of the positioning spring (64) is fixedly set on the inner wall of the square opening (63). The positioning buckle (65) is arc-shaped on one side. The outer surface of the control ring (66) is inclined. The arc slope (69) fits against the positioning spring (64).
7. The anti-slip urinary catheter fixation device according to claim 3, characterized in that: The threaded shaft (71) is adapted to the threaded sleeves (55) on several sets of movable rings (54), and the four sets of fixing pins (74) fix the binding strap (73) and the fixing piece (72) together, and the two sets of Velcro (75) are glued together.
8. The anti-slip urinary catheter fixation device according to claim 4, characterized in that: The water injection pipe (8), water injection cavity (10), and urinary catheter body (1) are connected internally, and the water injection balloon (12) covers the outside of the water injection port (11).