Self-locking fixator for drainage tube

Abstract

The invention discloses a drainage tube self-locking fixator, and belongs to the field of medical instruments, the drainage tube self-locking fixator comprises a base, the two ends of the base are detachably connected with connecting belts, the connecting belts are provided with tightness adjusting structures used for adjusting the length of the connecting belts, the base is fixedly connected with a mounting block, and the mounting block is fixedly connected with the base. A connecting hole allowing a drainage tube to be inserted is formed in the mounting block, the connecting hole penetrates through the base, and a limiting mechanism used for limiting movement of the drainage tube is arranged in the mounting block. The drainage tube fixing device has the effects that the drainage tube is fixed, the sliding possibility of the drainage tube is reduced, and then the drainage tube is prevented from falling off and the like.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a self-locking fixator for a drainage tube. Background Technology

[0002] Currently, drainage tubes are commonly used instruments in clinical medicine during surgery and postoperative care. They are mainly used to drain fluid, blood, pus, and other secretions from the patient's body, ensuring wound healing and preventing infection. Effective fixation of the drainage tube is a crucial aspect of clinical nursing. If the drainage tube is not securely fixed, it is prone to slippage or displacement, which not only affects the drainage effect but may also cause wound infection, secondary injury, and increase patient suffering and nursing workload.

[0003] Currently, the most common methods for securing drainage tubes in clinical practice are direct application of medical adhesive tape or threaded friction clamping. However, the adhesive strength of tape gradually decreases over time due to sweat or secretions, making the drainage tube prone to slippage, especially when the patient turns over or moves, significantly increasing the risk of slippage. Furthermore, direct contact with the skin with the tape results in poor breathability, and prolonged use can lead to skin redness, itching, allergies, and even pressure sores, causing skin damage. With friction clamping, the drainage tube may be pulled out or slide inward under continuous or accidental axial traction during patient movement, posing a risk of dislodgement or injury to the patient. Summary of the Invention

[0004] In order to fix the drainage tube, reduce the possibility of it slipping, and thus prevent the drainage tube from falling off, this application provides a self-locking device for the drainage tube.

[0005] The self-locking fixation device for drainage tubes provided in this application adopts the following technical solution: A self-locking device for a drainage tube includes a base, with connecting straps detachably connected to both ends of the base. The connecting straps are provided with a tension adjustment structure for adjusting the length of the connecting straps. An mounting block is fixedly connected to the base, and the mounting block has a connecting hole for inserting a drainage tube. The connecting hole passes through the base, and a limiting mechanism for restricting the movement of the drainage tube is provided inside the mounting block.

[0006] By adopting the above technical solution, the detachable connection between the connecting strap and the base makes wearing and removing the fixation device more convenient. Furthermore, the connecting strap can be replaced with different adjustable ranges to suit different body parts and body shapes. The tension adjustment structure, by adjusting the length of the connecting strap, allows the fixation device to adapt to different body parts and body shapes within a certain position, achieving a snug fit and fixation of the drainage tube. The restraining mechanism can limit the movement of the drainage tube, preventing the possibility of slippage or inward sliding due to external force or patient movement, thus improving the stability of the drainage tube.

[0007] Preferably, the limiting mechanism includes an active turntable and a driven turntable, the active turntable and the driven turntable are symmetrically arranged about the connecting hole, the mounting block has a placement groove, the placement groove is connected to the connecting hole, and the active turntable and the driven turntable are rotatably disposed in the placement groove; Multiple grooves are evenly formed on the peripheral sidewalls of the active turntable and the driven turntable. Clamping balls are rotatably connected in the grooves. The depth of the grooves increases progressively, and the diameter of the clamping balls installed in them increases progressively. The clamping balls clamp the drainage tube. The limiting mechanism also includes a positioning component for limiting the rotation of the clamping balls and an adjustment component for driving the rotation of the active turntable and the driven turntable.

[0008] By adopting the above technical solution, the groove depth and clamping ball diameter on the active and driven turntables are designed to increase in a stepped manner. Rotating the turntable allows for switching between clamping balls of different diameters to adapt to the drainage tube, enabling compatibility with drainage tubes of different diameters. This eliminates the need for dedicated retainers for different types of drainage tubes, improving the versatility and applicability of the retainer. The clamping balls and drainage tube are clamped through point contact. Compared to traditional rigid clamping, this method not only restricts axial movement and radial sway of the drainage tube through the contact constraint of the clamping balls, but also avoids squeezing damage to the tube wall, ensuring the structural integrity and smooth drainage of the drainage tube.

[0009] Preferably, the adjustment assembly includes a driving rod and a driven rod. The driving rod is fixedly connected to the driving turntable, and the driven rod is fixedly connected to the driven turntable. The top ends of both the driving rod and the driven rod are rotatably connected to the mounting block and have adjustment knobs fixedly connected to them. The adjustment knobs are provided with scale lines. Both the driving rod and the driven rod are fixedly fitted with rollers, and a conveyor belt is fitted on the two rollers. The rollers are located at both ends of the conveyor belt.

[0010] By adopting the above technical solution, rotating the adjustment knob can drive the active rod to rotate, which in turn drives the active turntable to rotate. Under the synchronous drive of the turntable and the conveyor belt, when the active turntable rotates, the driven turntable rotates synchronously. This allows the clamps of the same diameter on the active and driven turntables to be located on both sides of the drainage tube and clamp the outer wall of the drainage tube. Thus, when medical staff select different sizes of drainage tubes according to different wound conditions, they can use the adjustment knob to select the appropriate size clamping ball to fix the drainage tube. The operation is quick and convenient, and it can improve the versatility of the fixator.

[0011] Preferably, the peripheral sidewall of the active rod is uniformly provided with limiting holes, and the positions of the multiple limiting holes correspond one-to-one with the positions of the multiple clamping balls. The inner wall of the placement groove is provided with a limiting groove, and a limiting rod and a first spring are provided in the limiting groove. The two ends of the first spring are respectively fixedly connected to the limiting rod and the inner wall of the limiting groove. The end of the limiting rod away from the first spring is hemispherical, and the limiting rod is inserted into the limiting hole.

[0012] By adopting the above technical solution, when switching clamping specifications, only external force needs to be applied to rotate the adjustment knob to squeeze the insertion ball, compress the first spring, and disengage it from the current limiting hole. After rotating to the target position, the first spring automatically resets, allowing the insertion ball to embed into the corresponding limiting hole for positioning. No additional tools are required, simplifying the operation steps for medical staff and improving the efficiency of drainage tube fixation. The elastic force of the first spring ensures that the insertion ball always maintains an insertion fit with the limiting hole, effectively preventing the active turntable from rotating unexpectedly due to patient movement or external vibration, avoiding accidental switching of clamping ball specifications, and ensuring long-term stable clamping of the drainage tube.

[0013] Preferably, the positioning component includes a push rod and multiple elastic rods. Positioning grooves are formed in both the active rod and the driven rod. The push rod slides within the positioning groove and passes through the adjusting knob. Multiple guide grooves are formed in the active rod, communicating with the positioning grooves. The guide grooves extend into the active turntable and communicate with the recess. The elastic rod is disposed within the guide groove. One end of the elastic rod is fixedly connected to the push rod, and the other end is fixedly connected to a stop block. The stop block abuts against the clamping ball. A fixing component for securing itself is provided on the push rod.

[0014] By adopting the above technical solution, after the drainage tube is inserted, medical staff press down on the push rod. The push rod moves down and pushes the elastic rod down. The flexibility of the elastic rod allows it to move in a curved manner within the guide groove and cause the abutment to abut against the surface of the clamping ball, thereby restricting the free rotation of the clamping ball and ensuring that the clamping ball fits tightly against the outer wall of the drainage tube. With the locking of the push rod position by the fixing component, the abutment can be maintained and the locking failure caused by external vibration can be prevented.

[0015] Preferably, the fixing component includes a fixing block and a second spring. A storage groove is provided on the side wall of the push rod. The fixing block and the second spring are disposed in the storage groove. The fixing block abuts against the inner wall of the positioning groove. A slot is provided on the inner wall of the positioning groove. The fixing block is inserted into the slot. A release element for releasing the fixing of the push rod is provided in the slot.

[0016] By adopting the above technical solution, the fixing block compresses the second spring under the action of the inner wall of the positioning groove and is placed in the storage groove. When the medical staff pushes the push rod to move downward, the fixing block slides downward. When the fixing block is aligned with the slot, the fixing block is inserted into the slot under the push of the second spring force, thereby fixing the position of the push rod.

[0017] Preferably, the release element is a release rod, the slot passes through the adjusting torsion sidewall, the release rod slides in the slot, a limiting groove is formed in the inner wall of the slot, a limiting rod is slidably disposed in the limiting groove, the limiting rod is fixedly connected to the release rod, the fixing block is inserted into the slot and abuts against the release rod, and the end of the release rod away from the fixing block extends out of the slot.

[0018] By adopting the above technical solution, when the fixing block is inserted into the slot, the fixing block pushes the release rod to move away from the fixing block. The limiting rod moves together with the connecting rod. The limiting groove can limit the movement range of the limiting rod, thereby preventing the release rod from dislodging from the slot. When medical staff need to remove the drainage tube, they push the extension of the release rod inward. The inward movement of the release rod pushes the fixing block to compress the second spring. When the fixing block is dislodged from the slot by the release rod, the elastic force of the elastic rod will push the push rod upward. At the same time, the abutment releases the fixing of the clamping ball, and the clamping ball can rotate on its own. At this time, medical staff can directly remove the drainage tube. When the drainage tube moves, the clamping ball rotates under the movement of the drainage tube without affecting the movement of the drainage tube. Alternatively, the clamping ball can be rotated away from the drainage tube by adjusting the knob before removing the drainage tube.

[0019] Preferably, a locking disc is provided at the bottom of the connecting hole, and a through groove is provided in the locking disc, which communicates with the connecting hole. Multiple locking grooves are evenly provided on the inner wall of the through groove. A locking block and a third spring are slidably connected in the locking groove. The two ends of the third spring are respectively fixedly connected to the locking block and the inner wall of the locking groove. An inclined surface is provided on the locking block, and the drainage tube abuts against the inclined surface. The locking block abuts against the drainage tube.

[0020] By adopting the above technical solution, when the drainage tube is inserted into the bottom of the connecting hole and abuts against the inclined surface of the locking block, the locking block can be squeezed to compress the third spring and retract into the locking groove, so as to realize the smooth insertion of the drainage tube. Subsequently, the locking block clamps the drainage tube under the elasticity of the third spring. The locking block is located at the bottom end of the drainage tube and clamps and fixes it. Combined with the clamping ball above it, both ends of the inserted part of the drainage tube are clamped and fixed, improving the fixation effect, while avoiding the situation where the drainage tube moves inside the fixator due to clamping the drainage tube alone.

[0021] Preferably, the end face of the locking block away from the third spring is configured as an arc shape.

[0022] By adopting the above technical solution, the arc-shaped end face and the cylindrical outer wall of the drainage tube are in surface contact. Compared with planar contact, the contact area is larger and the force is more even. This can effectively increase the friction between the locking block and the drainage tube, further prevent the drainage tube from sliding axially or shaking radially, strengthen the one-way self-locking anti-dislodgement effect, and at the same time avoid the corners of the locking block from hooking the outer wall of the drainage tube during insertion and removal, improve the smoothness of operation for medical staff and reduce patient pain.

[0023] In summary, this application includes at least one of the following beneficial technical effects: The detachable connection between the connecting strap and the base makes it easier to put on and take off the fixator. Different adjustable connecting straps can be used to accommodate different body parts and body shapes. The tension adjustment mechanism allows the fixator to adapt to different body parts and body shapes within a specific orientation by adjusting the length of the connecting strap, ensuring a snug fit and secure fixation of the drainage tube. The restraining mechanism limits the movement of the drainage tube, preventing it from slipping or sliding inwards due to external force or patient movement, thus improving the stability of the drainage tube. The groove depth and clamping ball diameter on the active and driven turntables are designed with a stepped increase, allowing for switching between different diameter clamping balls to adapt to the drainage tube by rotating the turntable. This enables compatibility with drainage tubes of different diameters, eliminating the need for dedicated retainers for different models of drainage tubes and improving the versatility and applicability of the retainer. The clamping balls and drainage tube are clamped through point contact. Compared to the rigid clamping of traditional claws, this method not only restricts the axial movement and radial sway of the drainage tube through the contact constraint of the clamping balls, but also avoids squeezing damage to the drainage tube wall, ensuring the structural integrity of the drainage tube and smooth drainage. After the drainage tube is inserted, the medical staff presses down on the push rod. The push rod moves downward, pushing the elastic rod downward. The elastic rod's own flexibility allows it to move in a curved path within the guide groove, causing the abutment to abut against the surface of the clamping ball. This restricts the free rotation of the clamping ball, ensuring that the clamping ball fits tightly against the outer wall of the drainage tube. Combined with the locking mechanism that locks the push rod position, the abutment is maintained, preventing the locking mechanism from failing due to external vibration. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a self-locking fixator for drainage tubes.

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the mounting block in an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the prominent positioning component in the embodiments of this application.

[0027] Explanation of reference numerals in the attached figures: 1. Base; 2. Connecting belt; 3. Tension adjustment structure; 4. Connecting hole; 5. Mounting block; 6. Limiting mechanism; 7. Locking disc; 8. Driving turntable; 9. Driven turntable; 10. Placement slot; 11. Groove; 12. Clamping ball; 13. Positioning assembly; 14. Adjustment assembly; 15. Driving rod; 16. Driven rod; 17. Adjustment knob; 18. Scale line; 19. Rotary wheel; 20. Conveyor belt; 21. Limiting hole; 22. Limiting groove; 23. Limiting... 24. Fixed rod; 25. First spring; 26. Push rod; 27. Elastic rod; 28. Positioning groove; 29. ​​Guide groove; 30. Abutment block; 31. Fixing assembly; 32. Fixing block; 33. Second spring; 34. Storage groove; 35. Slot; 36. Release rod; 37. Limiting groove; 38. Limiting rod; 39. Locking disc; 40. Through groove; 41. Locking groove; 42. Locking block; 43. Third spring; 44. Inclined surface; 45. Arc-shaped surface; 46. Vent hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] This application discloses a self-locking device for drainage tubes, such as... Figure 1 As shown, the device includes a base 1, connecting straps 2, mounting blocks 5, a restraining mechanism 6, and a locking disc 387. The base 1 is made of medical-grade ABS material and is integrally injection molded. It is flexible and can be bent into an arc-shaped plate to fit the human torso, limbs, and other parts of the body. The base 1 has multiple ventilation holes. Both ends of the base 1 are detachably connected to the connecting straps 2 via a buckle structure. The connecting straps 2 are medical elastic webbing with a tension adjustment structure 3 to adjust the effective length of the connecting straps 2, thereby adjusting the wearing circumference of the fixator to suit the fixation needs of patients of different body types and different body parts.

[0030] like Figure 1 and Figure 2 As shown, a mounting block 5 is fixedly connected to the middle of the base 1 by hot-melt welding. The mounting block 5 is a hollow cuboid structure with an axially oriented connecting hole 4 for inserting a drainage tube. The connecting hole 4 extends along the axis of the mounting block 5 to the base 1, allowing the drainage tube to pass through the connecting hole 4 for stable positioning. The mounting block 5 has a placement groove 10 communicating with the connecting hole 4 inside. The placement grooves 10 are symmetrically arranged and are used to install the limiting mechanism 6.

[0031] like Figure 2As shown, the limiting mechanism 6 includes an active turntable 8, a driven turntable 9, an adjustment component 14, and a positioning component 13. Both the active turntable 8 and the driven turntable 9 are circular turntables with their axes perpendicular to the base 1 and symmetrically rotating about the connection hole 4 within the placement groove 10. Multiple grooves 11 are formed on the peripheral sidewalls of both the active turntable 8 and the driven turntable 9. The depth of each groove 11 increases progressively along the turntable axis. Each groove 11 is rotatably connected to a clamping ball 12 via a rotating shaft. The clamping ball 12 is made of medical-grade silicone, and its diameter increases synchronously with the depth of the groove 11. By rotating the active turntable 8 and the driven turntable 9 using the adjustment component 14, clamping balls 12 of different diameters can be used to clamp different sizes of drainage tubes, achieving adaptable clamping of multiple drainage tube sizes and improving the applicability of the fixator.

[0032] like Figure 2 As shown, the adjustment assembly 14 includes a driving rod 15, a driven rod 16, and two adjustment knobs 17. Both the driving rod 15 and the driven rod 16 are cylindrical. The bottom end of the driving rod 15 is coaxially and fixedly connected to the driving turntable 8, and the top end extends to the outside of the mounting block 5 and is fixedly connected to the adjustment knob 17. The bottom end of the driven rod 16 is coaxially and fixedly connected to the driven turntable 9, and the top end extends to the outside of the mounting block 5 and is fixedly connected to the adjustment knob 17. Rotary wheels 19 are fixedly fitted onto the side walls of both the driving rod 15 and the driven rod 16. A conveyor belt 20 is fitted onto the two rotary wheels 19 at both ends of the conveyor belt 20, and the connecting hole 4 is located in the middle of the two parallel sides of the conveyor belt.

[0033] like Figure 2 As shown, limiting holes 21 are evenly provided on the peripheral sidewall of the active rod 15. The positions of the multiple limiting holes 21 correspond one-to-one with the moving positions of the multiple clamping balls 12. A limiting groove 22 is provided on the inner wall of the placement groove 10 extending horizontally. A first spring 24 and a limiting rod 23 are arranged horizontally inside the limiting groove 22. The two ends of the first spring 24 are fixedly connected to the inner wall of the limiting groove 22 and the sidewall of the limiting rod 23, respectively. A plug-in ball is fixedly connected to the end of the limiting rod 23 away from the first spring 24. The plug-in ball is inserted into the limiting hole 21.

[0034] like Figure 2As shown, during the rotation of the active rod 15 driven by the adjustment knob 17, the rotation of the active rod 15 compresses the first spring 24 by pressing the limiting rod 23 against the surface of the insertion ball, causing the insertion ball to disengage from the current limiting hole 21. Simultaneously, the rotation of the active rod 15 drives the active turntable 8 to rotate, thereby adjusting the clamping balls 12 of different diameters to be rotated into the connection hole 4. The rotation of the active rod 15 synchronously drives the driven rod 16 to rotate via the rotating wheel 19 and the conveyor belt 20, thus enabling the clamping balls 12 on the active turntable 8 and the driven turntable 9 to be adjusted synchronously, ensuring that the diameter of the clamping balls 12 entering the connection hole 4 on both turntables is consistent. When the rotation adjustment is complete, the first spring 24 automatically resets and pushes the insertion ball into the corresponding limiting hole 21, effectively limiting and fixing the active rod 15 and the adjustment knob 17, preventing the active turntable 8 from moving or rotating due to patient movement or external vibrations, and avoiding affecting the clamping effect of the drainage tube. The application provides two adjustment knobs 17, both of which can rotate the adjustment dial. The adjustment knobs 17 of the active lever 15 are provided with scale lines 18, which reflect the size of the clamping ball 12 currently located in the connection hole 4.

[0035] like Figure 2 and Figure 3 As shown, the positioning component 13 includes a push rod 25, multiple elastic rods 26, and multiple abutments 29. Each abutment 29 corresponds to one of the multiple elastic rods 26. Both the driving rod 15 and the driven rod 16 have vertically oriented positioning grooves 27 inside. The push rod 25 slides vertically within the positioning groove 27, and its top end extends outward through the adjustment knob 17 for easy manual operation. The positioning component 13 structure is identical in the driving rod 15, driving turntable 8, driven rod 16, and driven turntable 9. Taking the driving rod 15 and driving turntable 8 as an example, multiple radially extending guide grooves 28 are formed on the bottom inner wall of the positioning groove 27. The guide grooves 28 are arc-shaped, with one end connected to the positioning groove 27 and the other end extending to the driving turntable 8 and connecting to the groove 11. The elastic rod 26 is supported by medical-grade stainless steel spring wire and is set in the guide groove 28. One end of it is fixedly connected to the bottom end of the push rod 25 by welding, and the other end is fixedly connected to the abutment block 29 by adhesive bonding. The abutment block 29 slides in the end of the guide groove 28 near the clamping ball 12. The abutment block 29 is an arc-shaped silicone block that can accurately abut against the surface of the clamping ball 12.

[0036] like Figure 3As shown, the push rod 25 is equipped with a fixing component 30 for fixing its own position. The fixing component 30 includes a fixing block 31 and a second spring 32. A storage groove 33 is opened near the top side wall of the push rod 25. The fixing block 31 and the second spring 32 are both horizontally arranged in the storage groove 33. The two ends of the second spring 32 are respectively fixedly welded to the fixing block 31 and the inner wall of the storage groove 33. When the clamping ball 12 is not fixed, the push rod 25 is under the natural tension of the elastic rod 26, and the fixing block 31 abuts against the inner wall of the positioning groove 27 located at the top side wall of the adjustment knob 17, which can reduce the push rod 25 from shaking freely in the positioning groove 27. The positioning groove 27 is located at the bottom side wall of the adjustment knob 17 and has a slot 34 opened in its inner wall. The fixing block 31 is inserted into the slot 34, thereby limiting the position of the push rod 25. A release element is provided in the adjustment knob 17 to release the fixing effect of the fixing block 31. The release mechanism includes a release rod 35, a slot 34 that passes through the adjustment knob 17 in a horizontal direction, the release rod 35 slides in the slot 34, a limit groove 36 is formed in the inner wall of the slot 34, a limit rod 37 slides in the limit groove 36, the limit rod 37 is fixedly welded to the side wall of the release rod 35, and a fixing block 31 abuts against the release rod 35.

[0037] like Figure 2 and Figure 3 As shown, after the medical staff inserts the drainage tube and adjusts the size of the clamping ball 12, the medical staff pushes the push rod 25 downward. The push rod 25 moves downward, causing the fixing block 31 to slide downward against the inner wall of the positioning groove 27. When the fixing block 31 is aligned with the slot 34, the fixing block 31 is inserted into the slot 34 under the action of the second spring 32, and pushes the release rod 35 in the slot 34 to move away from the fixing block 31, so that the end of the release rod 35 away from the fixing block 31 extends out of the slot 34. At the same time, the push rod 25 moves downward, pushing the elastic rod 26 to move along the guide groove 28, so as to push the abutment 29 to press against the clamping ball 12. When the push rod 25 is fixed by the fixing block 31, the abutment 29 maintains the state of restricting the rotation of the clamping ball 12, thereby maintaining the fixing effect of the drainage tube.

[0038] like Figure 2As shown, a locking disc 387 is fixedly installed at the bottom of the connecting hole 4. A through groove 39 coaxially communicating with the connecting hole 4 is opened in the middle of the locking disc 387. Multiple locking grooves 40 are evenly opened on the inner wall of the through groove 39. A locking block 41 and a third spring 42 are slidably connected in each locking groove 40. The two ends of the third spring 42 are welded and fixed to the inner wall of the locking block 41 and the locking groove 40, respectively. An inclined surface 43 is provided at the end of the locking block 41 near the center of the through groove 39. The inclined surface 43 is inclined from the top to the bottom to facilitate the compression and retraction of the locking block 41 when the drainage tube is inserted. The end face of the locking block 41 away from the third spring 42, that is, the bottom end of the inclined surface 43, is set as an arc-shaped surface 44. The arc-shaped surface 44 can fit tightly against the outer wall of the drainage tube to achieve stable clamping. The locking disc 387 is positioned closest to the skin on the drainage tube, preventing the drainage tube below the clamping position of the clamping ball 12 from moving. The combination of the locking disc 387 and the clamping ball 12 ensures that both moving ends of the drainage tube inserted into the mounting block 5 are clamped and fixed, improving the fixation effect and preventing the drainage tube within the mounting block 5 from moving when clamped alone.

[0039] The implementation principle of this application embodiment is as follows: The active turntable 8 and the driven turntable 9 of the limiting mechanism 6, combined with the stepped clamping ball 12, can be synchronously driven to rotate through the adjustment knob 17, realizing the rapid switching of clamping specifications and adapting to the clamping needs of drainage tubes of different diameters; the positioning component 13 drives the stop block 29 to lock the clamping ball 12 through the push rod 25 and the elastic rod 26 to prevent the drainage tube from moving. The locking and unlocking of the push rod 25 can be completed by the fixing component 30 and the release component without additional tools; the locking plate 387 forms a one-way self-locking under the action of the locking block 41 and the third spring 42 to prevent the drainage tube from slipping; the buckle connection of the connecting strap 2 facilitates the quick wearing and removal of the fixation device, greatly simplifying the nursing operation process and shortening the operation time.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-locking retainer for a drainage tube, characterized in that: Includes a base (1), with connecting straps (2) detachably connected to both ends of the base (1), the connecting straps (2) being provided with a tension adjustment structure (3) for adjusting the length of the connecting straps (2), an mounting block (5) being fixedly connected to the base (1), the mounting block (5) being provided with a connecting hole (4) for inserting a drainage tube, the connecting hole (4) passing through the base (1), and a limiting mechanism (6) for restricting the movement of the drainage tube being provided inside the mounting block (5).

2. The self-locking retainer for a drainage tube according to claim 1, characterized in that: The limiting mechanism (6) includes an active turntable (8) and a driven turntable (9). The active turntable (8) and the driven turntable (9) are symmetrically arranged about the connecting hole (4). The mounting block (5) has a placement groove (10) that is connected to the connecting hole (4). The active turntable (8) and the driven turntable (9) are both rotatably disposed in the placement groove (10). Multiple grooves (11) are evenly provided on the peripheral sidewalls of the active turntable (8) and the driven turntable (9). A clamping ball (12) is rotatably connected in the groove (11). The depth of the groove (11) increases one by one, and the diameter of the clamping ball (12) installed therein increases one by one. The clamping ball (12) is clamped in the drainage tube. The limiting mechanism (6) also includes a positioning component (13) for limiting the rotation of the clamping ball (12) and an adjusting component (14) for driving the active turntable (8) and the driven turntable (9) to rotate.

3. The self-locking retainer for a drainage tube according to claim 2, characterized in that: The adjustment assembly (14) includes an active rod (15) and a driven rod (16). The active rod (15) is fixedly connected to the active turntable (8), and the driven rod (16) is fixedly connected to the driven turntable (9). The top ends of the active rod (15) and the driven rod (16) are both connected to the mounting block (5) and have an adjustment knob (17) that rotates around them. The adjustment knob (17) has a scale line (18). The active rod (15) and the driven rod (16) are both fixedly fitted with a rotating wheel (19). The two rotating wheels (19) are fitted with a conveyor belt (20). The rotating wheels (19) are located at both ends of the conveyor belt (20).

4. The self-locking retainer for a drainage tube according to claim 3, characterized in that: The active rod (15) has uniformly provided limiting holes (21) on its peripheral sidewall. The positions of the multiple limiting holes (21) correspond one-to-one with the positions of the multiple clamping balls (12). The inner wall of the placement groove (10) has a limiting groove (22). A limiting rod (23) and a first spring (24) are provided in the limiting groove (22). The two ends of the first spring (24) are fixedly connected to the limiting rod (23) and the inner wall of the limiting groove (22), respectively. The end of the limiting rod (23) away from the first spring (24) is hemispherical. The limiting rod (23) is inserted into the limiting hole (21).

5. A self-locking retainer for a drainage tube according to claim 3, characterized in that: The positioning component (13) includes a push rod (25) and multiple elastic rods (26). The active rod (15) and the driven rod (16) are both provided with positioning grooves (27). The push rod (25) slides in the positioning groove (27) and passes through the adjustment knob (17). The active rod (15) is provided with multiple guide grooves (28). The guide grooves (28) are connected to the positioning grooves (27). The guide grooves (28) extend into the active turntable (8) and are connected to the groove (11). The elastic rods (26) are disposed in the guide grooves (28). One end of the elastic rod (26) is fixedly connected to the push rod (25), and the other end is fixedly connected to a stop block (29). The stop block (29) abuts against the clamping ball (12). The push rod (25) is provided with a fixing component (30) for fixing itself.

6. A self-locking retainer for a drainage tube according to claim 5, characterized in that: The fixing component (30) includes a fixing block (31) and a second spring (32). A storage groove (33) is provided on the side wall of the push rod (25). The fixing block (31) and the second spring (32) are disposed in the storage groove (33). The fixing block (31) abuts against the inner wall of the positioning groove (27). A slot (34) is provided on the inner wall of the positioning groove (27). The fixing block (31) is inserted into the slot (34). A release element for releasing the fixing of the push rod (25) is provided in the slot (34).

7. A self-locking retainer for a drainage tube according to claim 6, characterized in that: The release component is a release rod (35). The slot (34) passes through the adjusting torque sidewall. The release rod (35) slides in the slot (34). A limiting groove (36) is provided in the inner wall of the slot (34). A limiting rod (37) is slidably provided in the limiting groove (36). The limiting rod (37) is fixedly connected to the release rod (35). The fixing block (31) is inserted into the slot (34) and abuts against the release rod (35). One end of the release rod (35) away from the fixing block (31) extends out of the slot (34).

8. The self-locking retainer for a drainage tube according to claim 1, characterized in that: A locking disc (38)(7) is provided at the bottom end of the connecting hole (4). A through groove (39) is provided in the locking disc (38)(7). The through groove (39) communicates with the connecting hole (4). Multiple locking grooves (40) are evenly provided on the inner wall of the through groove (39). A locking block (41) and a third spring (42) are slidably connected in the locking groove (40). The two ends of the third spring (42) are fixedly connected to the locking block (41) and the inner wall of the locking groove (40) respectively. An inclined surface (43) is provided on the locking block (41). The drainage tube abuts against the inclined surface (43). The locking block (41) abuts against the drainage tube.

9. A self-locking retainer for a drainage tube according to claim 8, characterized in that: The end face of the locking block (41) away from the third spring (42) is set as an arc-shaped surface (44).

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