Medical drainage tube anti-pulling device

Abstract

The application relates to a medical drainage tube anti-pulling device which comprises a sleeve arranged outside the drainage tube and a fixing structure for fixing the sleeve, the sleeve comprises a rotating cylinder and two end covers, the rotating cylinder can rotate relative to the two end covers, an inner cylinder is arranged in the rotating cylinder, an annular space is formed between the inner cylinder and the rotating cylinder, a group of clamping pieces are symmetrically arranged on the two sides of the drainage tube in the annular space, two groups of double-stage buffer assemblies are arranged on the two groups of clamping pieces respectively, the double-stage buffer assemblies can slide relative to the rotating cylinder under the traction of the drainage tube. A locking part for locking the axial movement of the double-stage buffer assemblies is arranged on the rotating cylinder, and a locking matching part is arranged on the clamping piece. The medical drainage tube anti-pulling device can realize stable clamping of the drainage tube, graded buffer absorption of the pulling force, and simultaneously consider the operation convenience and clinical adaptability, effectively reduces the unplanned extubation risk, and guarantees the drainage safety.

Description

Technical Field

[0001] This invention relates to the field of medical and nursing device technology, and in particular to a medical drainage tube anti-pull device. Background Technology

[0002] Medical drainage tubes are crucial medical devices used in clinical treatment to drain accumulated fluid, blood, or pus from patients. Their stability directly affects the drainage effect and patient safety. In clinical practice, patient movements such as turning over and limb movements can easily exert traction on the drainage tube. If traction protection is inadequate, the drainage tube can easily shift or dislodge, leading to unplanned removal. This not only affects the drainage treatment effect but may also cause complications such as local tissue damage and infection, increasing medical risks and nursing burden.

[0003] Currently, existing medical drainage tube fixation devices are simple fixation structures, such as using medical tape to directly attach the drainage tube to the patient's body surface, or using a single buckle to limit the drainage tube to a fixing base. Chinese Patent Publication No. CN214181419U discloses a medical anti-traction drainage tube fixation device. In this device, a clamping component is installed on a fixing belt. The clamping component includes a clamping plate and a fixing plate arranged parallel to each other. The fixing plate is fixedly mounted on the fixing belt and has a limiting mechanism for fixing and limiting the drainage tube. A first biting tooth is provided on the surface of the fixing plate corresponding to the position of the drainage tube. A second biting tooth, which is offset from the first biting tooth, is provided on the side of the clamping plate facing the fixing plate. At least two inwardly stretching elastic elements connect the clamping plate and the fixing plate. A triggering mechanism is provided on the fixing plate. Such devices are simple in structure and low in cost, but lack an effective anti-traction buffer mechanism. When the drainage tube is subjected to traction force, the force will be directly transmitted to the interface between the drainage tube and the body surface, which is very ineffective in preventing unplanned tube removal. Moreover, the direction of the drainage tube cannot be flexibly adjusted after fixation, and the drainage tube is prone to bending or twisting due to patient movement, affecting the smoothness of drainage. Summary of the Invention

[0004] The purpose of this invention is to provide a medical drainage tube anti-pull device, which aims to facilitate the stable clamping of the drainage tube, graded buffering and absorption of pulling force, and reduce the risk of accidental tube removal.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a medical drainage tube anti-pull device, comprising: a sleeve sleeved outside the drainage tube and a fixing structure for fixing the sleeve; Along the axial direction of the sleeve, the sleeve includes a central rotating cylinder and two end caps disposed at both ends of the rotating cylinder. An annular rotating pair is provided between each end of the rotating cylinder and the two end caps, so that the rotating cylinder can rotate relative to the two end caps. A central hole for inserting the drainage tube is provided through the middle of the two end caps. An inner cylinder is provided inside the rotating cylinder. The two ends of the inner cylinder are fixedly connected to the two end caps, and an annular space is formed between the inner cylinder and the rotating cylinder. A sliding hole communicating with the annular space is provided on the inner cylinder, and the sliding hole extends along the axial direction of the inner cylinder. Within the annular space, along the radial direction of the drainage tube, a set of clamping members are symmetrically arranged on opposite sides of the drainage tube. The two sets of clamping members are used to clamp the drainage tube. Along the axial direction of the drainage tube, two sets of dual-stage buffer assemblies are respectively arranged on the two sets of clamping members. The dual-stage buffer assemblies are driven by the traction force of the drainage tube and can slide relative to the rotating drum. The rotating drum is provided with a locking part for locking the axial movement of the dual-stage buffer assembly, and the clamping member is provided with a locking engagement part. When the locking engagement part is restricted by the locking part, the movement of the clamping member along the rotating drum is restricted. When the locking part releases the restriction on the engagement part, the rotating drum is driven to rotate relative to the end cover, and the clamping member can slide in the sliding hole as pulled by the drainage tube. The fixed structure is provided with a through hole coaxial with the central hole, so that the drainage tube can pass through.

[0006] Furthermore, the clamping member includes a clamping plate, a push rod, and a sliding sleeve. One end of the sliding sleeve is slidably connected to the rotating cylinder, and the other end of the sliding sleeve passes through the sliding hole. The push rod is slidably disposed in the sliding sleeve, and one end of the push rod is connected to the clamping plate, while the other end of the push rod is a free end.

[0007] Furthermore, an elastic reset member is provided between the sliding sleeve and the push rod, the elastic reset member being used for the sliding reset of the push rod relative to the sliding sleeve.

[0008] Furthermore, the elastic reset element is configured as a tension spring, one end of which is connected to the push rod, and the other end of which is connected to the inner side of the sliding sleeve.

[0009] Furthermore, the tension springs are arranged in multiple configurations around the push rod along its axial direction.

[0010] Furthermore, the locking part includes a locking hole provided on the rotating drum and a first sliding groove and a second sliding groove formed on the inner side of the rotating drum. The sliding sleeve and the push rod can slide along the first sliding groove and the second sliding groove. The first slide groove is an arc-shaped groove arranged around the inner wall of the rotating cylinder along its axial direction. The locking hole communicates with the first slide groove. The second slide groove is arranged along the axial direction of the rotating cylinder and communicates with the end of the first slide groove. The locking engagement part is a button located at the free end of the push rod. When the button is confined within the locking hole, the clamping member releases the restriction on the drainage tube. When the button is disengaged from the locking hole by the rotation of the rotating drum and slides from the first slide groove to the second slide groove, the clamping member clamps the drainage tube. When the button slides along the second slide groove, the clamping member can slide relative to the inner cylinder as the drainage tube is pulled.

[0011] Furthermore, the dual-stage buffer assembly includes a first spring and a second spring, which are respectively disposed on both sides of the sliding sleeve along the axial direction of the drainage tube. One end of the first spring is connected to the end cap, and the other end is connected to the upper side of the sliding sleeve. One end of the second spring is connected to the lower side of the sliding sleeve, and the other end is connected to another end cap. The spring constant of the first spring is less than that of the second spring.

[0012] Furthermore, the fixing structure includes a fixed base that contacts the body surface and a support frame for supporting the sleeve. One end of the fixed base and the support frame are hinged together, and the other end of the support frame is snapped together with the sleeve.

[0013] Furthermore, an angle adjustment component is provided between the fixed base and the support frame, the angle adjustment component being used to adjust the angle between the fixed base and the support frame.

[0014] Furthermore, the angle adjustment component includes a locking pin mounted on the fixed base via a third spring, and a gear mounted on the support frame. The locking pin is engaged with the gear under the elastic force of the third spring, and the locking pin can rotate relative to the gear.

[0015] The beneficial effects of the medical drainage tube anti-pull device provided by the present invention are as follows: Compared with existing technologies, the medical drainage tube anti-traction device of the present invention, by enabling the rotating cylinder to rotate circumferentially relative to the end cap, provides the structural basis for ensuring the coordinated operation of the locking part and the locking mating part, guaranteeing the smooth completion of subsequent locking and clamping operations. Simultaneously, the inner cylinder and the rotating cylinder form an annular space and an axial sliding hole, providing installation space for the clamping component and the dual-stage buffer assembly, while limiting the clamping component to sliding only axially, preventing radial offset that could cause operational jamming or reduce the buffering effect. The dual-stage buffer assembly addresses the absorption requirements of traction force, achieving a graded buffering and absorption effect, reducing the risk of unplanned tube removal. The entire solution, through the coordinated cooperation of its components, achieves stable clamping of the drainage tube and graded buffering and absorption of traction force, while also considering ease of operation and clinical adaptability, effectively reducing the risk of unplanned tube removal and ensuring drainage safety. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the overall structure of a medical drainage tube anti-pull device under one state, provided by an embodiment of the present invention; Figure 2 A schematic diagram of the overall structure of a medical drainage tube anti-pull device in another state provided by an embodiment of the present invention; Figure 3 A cross-sectional view of the internal structure of the sleeve provided in an embodiment of the present invention; Figure 4 A cross-sectional view of the sleeve structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the rotating drum structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the clamping member provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the angle adjustment component provided in an embodiment of the present invention.

[0018] In the diagram: 1. Sleeve; 2. Rotating cylinder; 21. Inner cylinder; 211. Sliding hole; 22. Annular space; 23. Locking hole; 24. First sliding groove; 25. Second sliding groove; 3. End cap; 31. Center hole; 4. Clamping component; 41. Clamping plate; 42. Push rod; 421. Button; 43. Sliding sleeve; 44. Tension spring; 5. Two-stage buffer assembly; 51. First spring; 52. Second spring; 6. Fixing structure; 61. Fixing base; 611. Through hole; 62. Support frame; 63. Angle adjustment component; 631. Locking post; 632. Third spring; 633. Rotating shaft; 634. Gear; 7. Drainage tube. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this embodiment clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this embodiment and are not intended to limit this embodiment.

[0020] Example 1 Please refer to the following: Figures 1 to 7 The following describes an anti-pull device for a medical drainage tube 7 provided in this embodiment. This anti-pull device for a medical drainage tube includes a sleeve 1 fitted over the drainage tube 7 and a fixing structure 6 for fixing the sleeve 1.

[0021] Along the axial direction of the sleeve 1, the sleeve 1 includes a central rotating cylinder 2 and two end caps 3 at both ends of the rotating cylinder 2. Annular rotating pairs are provided between the two ends of the rotating cylinder 2 and the two end caps 3, allowing the rotating cylinder 2 to rotate relative to the two end caps 3. A central hole 31 for inserting a drainage tube 7 is provided through the middle of each end cap 3. An inner cylinder 21 is provided inside the rotating cylinder 2, with both ends fixedly connected to the two end caps 3. An annular space 22 is formed between the inner cylinder 21 and the rotating cylinder 2. A sliding hole 211 communicating with the annular space 22 is provided along the upper edge of the inner cylinder 21, extending axially along the inner cylinder 21. In this embodiment, the thickness of the end caps 3 is not specifically limited; the thickness of the two end caps 3 can be the same, or the dimensional parameters can be adjusted according to the actual design, so that the thickness of the two end caps 3 is not exactly the same.

[0022] Meanwhile, within the annular space 22, along the radial direction of the drainage pipe 7, a set of clamping members 4 are symmetrically arranged on opposite sides of the drainage pipe 7. The two sets of clamping members 4 are used to clamp the drainage pipe 7. Along the axial direction of the drainage pipe 7, two sets of double-stage buffer components 5 are respectively arranged on the two sets of clamping members 4. The double-stage buffer components 5 are driven by the traction force of the drainage pipe 7 and can slide relative to the rotating drum 2.

[0023] In addition, the rotating drum 2 is provided with a locking part for locking the axial movement of the dual-stage buffer assembly 5, and the clamping member 4 is provided with a locking engagement part. When the locking engagement part is restricted by the locking part, the movement of the clamping member 4 along the rotating drum 2 is restricted. When the locking part releases the restriction on the engagement part, the rotating drum 2 is driven to rotate relative to the end cover 3, and the clamping member 4 can slide in the sliding hole 211 as pulled by the drainage tube 7.

[0024] The fixed structure 6 is provided with a through hole 611 coaxially arranged with the central hole 31 so that the drainage tube 7 can pass through.

[0025] This embodiment of a medical drainage tube anti-traction device includes an annular rotating pair between the rotating cylinder 2 and the end cap 3. This provides a structural basis for adjusting the position of the locking engagement part by rotating the rotating cylinder 2, and can drive the locking part to rotate synchronously, ensuring the smooth completion of the locking-clamping operation of the drainage tube 7. The annular space 22 and axial sliding hole 211 formed by the inner cylinder 21 and the rotating cylinder 2 provide installation space for the clamping member 4 and the dual-stage buffer assembly 5, and also limit the clamping member 4 to slide only along the axial direction, preventing operation jamming or buffer failure caused by radial offset. The symmetrical clamping member 4 provides structural support for "dual-sided synchronous clamping of the drainage tube 7", ensuring that the drainage tube 7 can be evenly fixed after operation, avoiding damage to the catheter due to unilateral clamping; the dual-stage buffer assembly 5 corresponds to the force absorption requirements of the traction link, and can attenuate the traction force in stages, reducing the risk of unplanned tube removal. The locking part and the locking mating part work together to achieve a full-process mode switching of "unlocking and adjustment - clamping and fixing - buffering and sliding"; the coaxial through hole 611 of the fixed structure 6 ensures that the drainage tube 7 is inserted smoothly and avoids bending of the drainage tube 7 due to misalignment of the through hole 611, thus ensuring smooth drainage.

[0026] Based on the overall description of the above structure, an exemplary structure of a medical drainage tube anti-pull device in this embodiment is as follows: Figure 1 and Figure 2 As shown. One side of the fixing structure 6 contacts the body surface, and an adhesive surface is provided on the fixing structure 6 to facilitate adhesion to the skin. The sleeve 1 is provided on the other side of the fixing structure 6.

[0027] Preferably, the clamping member 4 disposed in the annular space 22 includes a clamping plate 41, a push rod 42 and a sliding sleeve 43. One end of the sliding sleeve 43 is slidably connected to the rotating cylinder 2, and the other end of the sliding sleeve 43 passes through the sliding hole 211 and contacts the clamping plate 41. The push rod 42 is slidably disposed in the sliding sleeve 43, and one end of the push rod 42 is connected to the clamping plate 41, while the other end of the push rod 42 is a free end.

[0028] like Figure 3 and Figure 4As shown, the sliding sleeve 43 covers the outside of the push rod 42. The outer end of the sliding sleeve 43 is slidably disposed inside the rotating cylinder 2, and the inner end of the sliding sleeve 43 passes through the sliding hole 211 and is flush with the inner wall of the inner cylinder 21. At the same time, the outer end of the push rod 42 can slide inside the sliding sleeve 43, and the other end of the push rod 42 passes through the sliding hole 211 and is connected to the clamping plate 41. The clamping plate 41 is an arc shape that fits the inner wall of the inner cylinder 21. The length of the clamping plate 41 extends along the axis of the inner cylinder 21, and the length of the clamping plate 41 is greater than the length of the sliding hole 211 to prevent the clamping plate 41 from coming out of the sliding hole 211. When the push rods 42 on opposite sides are pushed to slide along the sliding sleeve 43 towards the inner cylinder 21, the two clamping plates 41 can simultaneously retract towards the center to clamp the drainage tube 7.

[0029] Meanwhile, as a preferred option, it is still referred to Figure 3 As shown, an elastic reset element is provided between the sliding sleeve 43 and the push rod 42. The elastic reset element is used for the sliding reset of the push rod 42 relative to the sliding sleeve 43, preparing for the next tube insertion and adjustment operation. The elastic reset element is a tension spring 44, with one end connected to the push rod 42 and the other end connected to the inner side of the sliding sleeve 43. This connection method is compact and can flexibly adapt to the limited dimensions of the annular space 22. Furthermore, the tension of the tension spring 44 is gentle and stable, providing moderate resistance when operating the locking mechanism to ensure smooth operation, and providing continuous and gentle clamping force after clamping to avoid over-clamping and deformation of the drainage tube 7, while also ensuring the smooth reset of the push rod 42 and improving operational convenience.

[0030] Furthermore, multiple tension springs 44 are arranged axially around the push rod 42 to facilitate even distribution of force on each tension spring 44, optimize the force transmission effect of the tension springs 44, and improve the stability of clamping and resetting. The even distribution of multiple tension springs 44 can make the push rod 42 bear force evenly, avoid the tilting of the push rod 42 caused by the action of a single tension spring 44, and thus ensure that the contact surface between the clamping plate 41 and the drainage tube 7 bears force evenly, preventing excessive local pressure from damaging the drainage tube 7; at the same time, the synergistic effect of multiple sets of tension springs 44 can improve the stability of the resetting force, reduce the risk of fatigue failure of a single tension spring 44, and extend the overall service life of the device.

[0031] In this embodiment, the push rod 42 is driven by an external force to slide inward toward the sliding sleeve 43 against the tension of the tension spring 44 until the locking part releases the restriction on the locking engagement part, at which point the rotating cylinder 2 can slide relative to the end cover 3. At this time, rotating the rotating cylinder 2 causes the entire clamping member 4 to slide relative to the rotating cylinder 2 inside the rotating cylinder 2, thereby maintaining the clamping of the drainage tube 7 by the push rod 42 and the clamping plate 41.

[0032] In this embodiment, as a preferred implementation, such as Figures 3 to 5As shown, the locking part includes a locking hole 23 on the rotating drum 2 and a first sliding groove 24 and a second sliding groove 25 formed on the inner side of the rotating drum 2. The sliding sleeve 43 and the push rod 42 can slide along the first sliding groove 24 and the second sliding groove 25. The first sliding groove 24 is an arc-shaped groove arranged around the inner wall of the rotating drum 2 along its axial direction. The locking hole 23 connects to the first sliding groove 24. The second sliding groove 25 is arranged along the axial direction of the rotating drum 2 and is connected to the end of the first sliding groove 24. With this arrangement, the first sliding groove 24 of the locking part radially surrounds the rotating drum 2, providing a sliding path for adjusting the position of the locking engagement part by rotating the rotating drum 2. This ensures that the locking engagement part can accurately slide to the junction with the second sliding groove 25, adapting to the direction of the drainage tube 7 without adjusting the overall position of the device. Furthermore, the second sliding groove 25 is arranged along the axial direction of the rotating drum 2, providing guidance for the sliding of the clamping member 4 during pulling, ensuring the effective activation of the buffer function.

[0033] It should be noted that the second slide 25 can be configured as two separate tracks, each connecting one end of the first slide 24. This allows the rotating drum 2 to rotate clockwise or counterclockwise, ensuring the smooth implementation of subsequent steps. Alternatively, the second slide 25 can be configured as a single track, located in a section of the first slide 24, cooperating with the rotation of the rotating drum 2 to ensure the smooth implementation of subsequent steps. No specific limitation is made here; the design can be tailored to the actual situation.

[0034] Reference Figure 3 and Figure 6 As shown, the locking mechanism is a button 421 located at the free end of the push rod 42. When the button 421 is confined within the locking hole 23, the clamping member 4 releases the restriction on the drainage tube 7. Driven by the rotation of the rotating cylinder 2, the button 421 disengages from the locking hole 23 and slides from the first slide groove 24 to the second slide groove 25. At this point, the clamping member 4 clamps the drainage tube 7. As the button 421 slides along the second slide groove 25, the clamping member 4 can slide relative to the inner cylinder 21 with the pull of the drainage tube 7. When not in operation, the button 421 is confined to the locking hole 23, facilitating the insertion and adjustment of the drainage tube 7. After operation, rotation allows it to slide along the slide groove to complete the clamping. No special tools are required throughout the process, greatly improving the operational efficiency of medical staff.

[0035] In this embodiment, as a further preferred implementation, such as Figure 6As shown, the dual-stage buffer assembly 5 includes a first spring 51 and a second spring 52. The first spring 51 and the second spring 52 are respectively arranged on both sides of the sliding sleeve 43 along the axial direction of the drainage tube 7. One end of the first spring 51 is connected to the end cap 3, and the other end is connected to the upper side of the sliding sleeve 43. One end of the second spring 52 is connected to the lower side of the sliding sleeve 43, and the other end is connected to the other end cap 3. The elastic coefficient of the first spring 51 is smaller than that of the second spring 52. When the drainage tube 7 is slightly pulled, the first spring 51 only needs to be compressed to absorb the force, avoiding the small-amplitude pull from being transmitted to the interface between the drainage tube 7 and the skin. When subjected to severe pull, the first spring 51 is compressed to its limit, and the second spring 52 is compressed in conjunction to further absorb the impact force. The symmetrical distribution of the springs ensures that the clamping member 4 is subjected to balanced force when sliding, avoids tilting and jamming, and ensures a smooth and efficient buffering process.

[0036] The core operating procedure of the entire device is as follows: After the drainage tube 7 extends from the patient's body surface, it passes through the through hole 611 on the fixed base 61 of the fixed structure 6, and then through the central hole 31 of one of the end caps 3 into the inner cylinder 21, and then exits from the central hole 31 of the other end cap 3. Then the operator presses the button 421 on the two sets of clamping parts 4, which drives the push rod 42 to slide into the sliding sleeve 43; then the rotating cylinder 2 is rotated, at which point the push rod 42 cannot be reset, and the drainage tube 7 is firmly clamped by the clamping plate 41 of the clamping part 4. During rotation, push rod 42 slides synchronously along the first slide groove 24 of the inner locking part of the rotating cylinder 2 until it slides to the junction of the first slide groove 24 and the second slide groove 25, and the entire clamping member 4 enters the guide range of the second slide groove 25. When the drainage tube 7 is subjected to a pulling force, it will drive the entire clamping member 4 to slide axially along the second slide groove 25. At this time, the first spring 51 and the second spring 52 of the dual-stage buffer assembly 5 act synchronously on the sliding sleeve 43 of the clamping member 4, and absorb the pulling force through the compression deformation of the spring to achieve anti-pulling protection.

[0037] Example 2 This embodiment includes all the structures of the sleeve 1 in Embodiment 1, and on this basis, as a preferred implementation, the fixing structure 6 includes a fixing base 61 that contacts the body surface, and a support frame 62 for supporting the sleeve 1. One end of the fixing base 61 and the support frame 62 are hinged together, and the other end of the support frame 62 is snapped together with the sleeve 1.

[0038] The fixed base 61 has a large contact area with the body surface, which can reduce local pressure after the device is installed and fixed, avoiding skin pressure damage caused by long-term wear. The snap-fit ​​connection between the support frame 62 and the sleeve 1 facilitates quick fixation of the sleeve 1 after the drainage tube 7 is inserted, and also facilitates subsequent disassembly of the sleeve 1 for disinfection or replacement, reducing the risk of cross-infection and improving the efficiency of nursing operations. The support frame 62 and the sleeve 1 can be connected by a snap-fit ​​structure, which can be designed with reference to the snap-fit ​​structure in the prior art, and will not be described in detail here.

[0039] And to improve the versatility of the entire device, as a preferred option, such as... Figure 2 As shown, an angle adjustment component 63 is provided between the fixed base 61 and the support frame 62. The angle adjustment component 63 is used to adjust the angle between the fixed base 61 and the support frame 62. Before the drainage tube 7 is inserted into the sleeve 1 and fixed, the device posture can be adjusted by the angle adjustment component 63 to ensure that the fixed base 61 fits the body surface and that the sleeve 1 matches the direction of the drainage tube 7. After adjustment, the angle can be accurately locked to avoid angle deviation caused by patient movement or turning over, thereby reducing the additional traction tension of the drainage tube 7 caused by posture changes and ensuring the stable performance of subsequent clamping and buffering functions.

[0040] Among them, as a specific preferred implementation, such as Figure 7 As shown, the angle adjustment component 63 includes a locking post 631 mounted on a fixed base 61 via a third spring 632, and a gear 634 mounted on a support frame 62 via a rotating shaft 633. The locking post 631 is engaged with the gear 634 under the elastic force of the third spring 632, and the locking post 631 can rotate relative to the gear 634. The locking post 631 is mounted on the fixed base 61 via the third spring 632, and the gear 634 is mounted on the support frame 62. The locking post 631 and the gear 634 work together to achieve multi-position angle positioning, accurately adapting to different patient body contours and the direction of the drainage tube 7. The third spring 632 provides continuous clamping force to the locking post 631, ensuring stable angle locking and preventing failure due to vibration or slight contact. Furthermore, the locking post 631 can rotate synchronously with the gear 634, allowing medical staff to adjust the angle simply by moving the support frame 62 without additional unlocking steps, quickly adapting to installation needs and meeting the requirements of fast-paced clinical nursing operations.

[0041] The entire solution achieves stable clamping of the drainage tube 7 and graded buffering absorption of traction force through the coordinated operation of various components. At the same time, it takes into account the ease of operation and clinical suitability, effectively reducing the risk of unplanned tube removal and ensuring drainage safety.

[0042] The above description is only a preferred embodiment of this embodiment and is not intended to limit this embodiment. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this embodiment should be included within the protection scope of this embodiment.

Claims

1. A medical drainage tube anti-pull device, characterized in that, Includes a sleeve (1) fitted outside the drainage tube (7) and a fixing structure (6) for fixing the sleeve (1); Along the axial direction of the sleeve (1), the sleeve (1) includes a rotating cylinder (2) in the middle and two end caps (3) at both ends of the rotating cylinder (2). An annular rotating pair is provided between the two ends of the rotating cylinder (2) and the two end caps (3) respectively, so that the rotating cylinder (2) can rotate relative to the two end caps (3). A central hole (31) for the drainage tube (7) to be inserted is provided through the middle of the two end caps (3). An inner cylinder (21) is provided inside the rotating cylinder (2). The two ends of the inner cylinder (21) are fixedly connected to the two end caps (3) respectively, and an annular space (22) is formed between the inner cylinder (21) and the rotating cylinder (2). A sliding hole (211) communicating with the annular space (22) is provided on the inner cylinder (21). The sliding hole (211) extends along the axial direction of the inner cylinder (21). Within the annular space (22), along the radial direction of the drainage tube (7), a set of clamping members (4) are symmetrically arranged on opposite sides of the drainage tube (7). The two sets of clamping members (4) are used to clamp the drainage tube (7). Along the axial direction of the drainage tube (7), two sets of double-stage buffer components (5) are respectively arranged on the two sets of clamping members (4). The double-stage buffer components (5) are driven by the traction force of the drainage tube (7) and can slide relative to the rotating drum (2). The rotating drum (2) is provided with a locking part for locking the axial movement of the dual-stage buffer assembly (5), and the clamping member (4) is provided with a locking engagement part. When the locking engagement part is restricted by the locking part, the movement of the clamping member (4) along the rotating drum (2) is restricted. When the locking part releases the restriction on the engagement part, the rotating drum (2) is driven to rotate relative to the end cap (3), and the clamping member (4) can slide in the sliding hole (211) with the pull of the drainage tube (7). The fixing structure (6) is provided with a through hole (611) coaxially arranged with the central hole (31) for the drainage tube (7) to pass through.

2. The anti-pull device for a medical drainage tube according to claim 1, characterized in that, The clamping member (4) includes a clamping plate (41), a push rod (42) and a sliding sleeve (43). One end of the sliding sleeve (43) is slidably connected to the rotating cylinder (2), and the other end of the sliding sleeve (43) passes through the sliding hole (211) and contacts the clamping plate (41). The push rod (42) is slidably disposed in the sliding sleeve (43), and one end of the push rod (42) is connected to the clamping plate (41), while the other end of the push rod (42) is a free end.

3. The anti-pull device for a medical drainage tube according to claim 2, characterized in that, An elastic reset member is provided between the sliding sleeve (43) and the push rod (42), and the elastic reset member is used for the sliding reset of the push rod (42) relative to the sliding sleeve (43).

4. The anti-pull device for a medical drainage tube according to claim 3, characterized in that, The elastic reset component is configured as a tension spring (44), one end of which is connected to the push rod (42), and the other end of which is connected to the inner side of the sliding sleeve (43).

5. A medical drainage tube anti-pull device according to claim 4, characterized in that, The tension springs (44) are arranged in multiple axial configurations around the push rod (42).

6. The anti-pull device for a medical drainage tube according to claim 5, characterized in that, The dual-stage buffer assembly (5) includes a first spring (51) and a second spring (52). The first spring (51) and the second spring (52) are respectively disposed on both sides of the sliding sleeve (43) along the axial direction of the drainage tube (7). One end of the first spring (51) is connected to the end cap (3) and the other end is connected to the upper side of the sliding sleeve (43). One end of the second spring (52) is connected to the lower side of the sliding sleeve (43) and the other end is connected to another end cap (3). The elastic coefficient of the first spring (51) is less than that of the second spring (52).

7. A medical drainage tube anti-pull device according to claim 6, characterized in that, The locking part includes a locking hole (23) provided on the rotating cylinder (2) and a first sliding groove (24) and a second sliding groove (25) opened on the inner side of the rotating cylinder (2). The sliding sleeve (43) and the push rod (42) can slide along the first sliding groove (24) and the second sliding groove (25). The first slide groove (24) is an arc-shaped groove arranged around the inner wall of the rotating cylinder (2) along the axial direction. The locking hole (23) is connected to the first slide groove (24). The second slide groove (25) is arranged along the axial direction of the rotating cylinder (2) and is connected to the end of the first slide groove (24). The locking engagement part is a button (421) provided at the free end of the push rod (42). When the button (421) is restricted in the locking hole (23), the clamping member (4) releases the restriction on the drainage tube (7). When the button (421) is driven by the rotation of the rotating cylinder (2) to come out of the locking hole (23) and slides from the first slide groove (24) to the second slide groove (25), the clamping member (4) clamps the drainage tube (7). When the button (421) slides along the second slide groove (25), the clamping member (4) can slide relative to the inner cylinder (21) with the pull of the drainage tube (7).

8. The anti-pull device for a medical drainage tube according to claim 1, characterized in that, The fixing structure (6) includes a fixing base (61) that contacts the body surface and a support frame (62) for supporting the sleeve (1). One end of the fixing base (61) and the support frame (62) are hinged together, and the other end of the support frame (62) is snapped together with the sleeve (1).

9. A medical drainage tube anti-pull device according to claim 8, characterized in that, An angle adjustment component (63) is provided between the fixed base (61) and the support frame (62), and the angle adjustment component (63) is used to adjust the angle between the fixed base (61) and the support frame (62).

10. A medical drainage tube anti-pull device according to claim 9, characterized in that, The angle adjustment component (63) includes a locking pin (631) mounted on the fixed base (61) via a third spring (632) and a gear (634) mounted on the support frame (62) via a rotating shaft (633). The locking pin (631) is engaged with the gear (634) under the elastic force of the third spring (632), and the locking pin (631) can rotate relative to the gear (634).

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