Catheter anti-kink device

Abstract

This invention discloses a catheter anti-entanglement device, belonging to the field of medical device technology. The device includes a main frame, a catheter holder, a drive shaft, and a gear set. The drive shaft is connected to the lifting mechanism of the patient bed or the backrest adjustment mechanism, and through the gear set and rack transmission structure, converts the movement of the patient bed into the synchronous lifting movement of the catheter holder, thereby dynamically adjusting the catheter's reserved length and preventing catheter entanglement caused by changes in patient position. The device also includes a damping adjustment component, which increases the clamping damping of the catheter when the catheter clamping device rises, effectively preventing the catheter from sliding and pulling. Furthermore, the catheter clamping device adopts a clamping wheel bracket structure with a torsion spring shaft, facilitating quick installation and release of the catheter. This invention achieves adaptive adjustment of catheter height and anti-slip locking through pure mechanical linkage, improving treatment safety, patient comfort, and nursing efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to an anti-entanglement device for clinical care, particularly for catheter fixation and management in oncology. Background Technology

[0002] In the clinical treatment and postoperative rehabilitation of oncology patients, multiple sets of functional catheters (such as nutrition support catheters, chemotherapy drug infusion catheters, and body fluid drainage catheters) are often placed simultaneously. These catheters serve as key channels for maintaining treatment and life support, and the reliability, safety, and patient comfort of their management are of paramount importance. However, a series of systemic technical problems exist in clinical use, including catheter entanglement, pulling, displacement, and low comfort.

[0003] Specifically, most existing catheter fixation devices adopt static slots or clamp structures. Although they can achieve basic separation and positioning of the catheter, their design concept remains at the level of "passive fixation," failing to form a coordinated response mechanism with the patient's dynamic positional changes. This leads to the following core problems exposed in actual use:

[0004] The current system lacks dynamic adjustment based on patient position. Patients frequently need to change position during treatment, such as from supine to semi-recumbent, sitting up, or turning over. Existing devices have fixed catheter lengths and heights that are statically set and cannot adapt to changes in bed angle or patient position. This fixed catheter length leads to some catheters being pulled due to insufficient length when the patient turns over or sits up, while others become excessively long, drooping, tangled, or even knotted, severely impacting the stability of drug infusion and drainage efficiency.

[0005] Lack of anti-slip damping mechanism: When the patient sits up or the head of the bed is raised, the catheter is prone to slide down along the fixed structure under the action of gravity. This not only causes the catheter to shift or twist on the patient's body surface, but also directly pulls on the wound at the catheter insertion site, causing the patient pain, wound bleeding or increased risk of infection. In severe cases, it may lead to catheter dislodgement, endangering the safety of treatment.

[0006] The root cause of entanglement has not been fundamentally resolved: Although existing anti-entanglement devices separate catheters through slots, their layout is fixed, and there are still spaces for catheters to cross or twist. Especially in clinical scenarios where multiple catheters are used, medical staff are prone to catheters becoming entangled when changing dressings, flushing, or adjusting tubing, and it is not easy to separate them quickly, which increases the complexity and risk of clinical operations.

[0007] Low patient comfort and nursing efficiency: Static fixation restricts patients' freedom of movement in bed, and patients are afraid to move freely for fear of pulling on the catheter, affecting their enthusiasm for recovery. At the same time, medical staff need to frequently manually adjust the catheter position when performing catheter care, which is cumbersome and inefficient.

[0008] Therefore, there is an urgent need for a dynamic anti-entanglement device that can automatically adjust the catheter height and reserved length according to changes in the patient's position, and has anti-slip damping function, so as to achieve intelligent catheter following, anti-pulling and anti-entanglement, and improve treatment safety and patient comfort. Summary of the Invention

[0009] To address or improve upon the aforementioned problems in the existing technology, this application provides a catheter anti-winding device, specifically comprising:

[0010] The main frame has a vertically extending guide structure;

[0011] The catheter holder is mounted on the main frame and is able to move under the constraint of the guide structure; the catheter holder includes one or more transversely arranged catheter clamping devices and at least one rack, the catheter clamping devices being able to clamp the catheter longitudinally or release the clamped catheter;

[0012] A drive shaft is used to connect to the lifting mechanism or backrest adjustment mechanism of the hospital bed, and

[0013] A gear set includes a drive gear and at least one final gear that forms a transmission connection with the drive gear, the final gear meshing with the rack, and the drive gear being connected to the transmission shaft;

[0014] The gear set and rack have a preset total transmission ratio, which is used to adapt the lifting range of the catheter holder to the movement range of the lifting mechanism or backrest adjustment mechanism of the hospital bed.

[0015] Optionally, the total gear ratio is configured to satisfy at least one of the following conditions:

[0016] When the backrest adjustment mechanism of the hospital bed is raised from the supine position to the semi-recumbent position, the lifting range of the catheter holder is between 250mm and 400mm.

[0017] When the lifting mechanism of the hospital bed drives the entire hospital bed to rise and fall, the lifting range of the catheter support tends to be consistent with the lifting range of the hospital bed.

[0018] Optionally, each of the one or more catheter clamping devices includes:

[0019] Two clamping wheel brackets are arranged opposite each other, each clamping wheel bracket is provided with a clamping wheel, and the clamping wheel brackets can work in a reset state and a flipped state;

[0020] When the clamping wheel bracket is in the reset state, the clamping wheel is in the clamping state, and the two opposing clamping wheels are close together and their rims can make elastic contact to clamp the conduit. When the clamping wheel bracket is in the flipped state, the clamping wheel is in the non-clamping state, and the two opposing clamping wheels are far apart and their rims are no longer in contact to release the clamped conduit.

[0021] Optionally, each of the one or more catheter clamping devices further includes:

[0022] A fixed frame on which a clamping wheel bracket is mounted;

[0023] The adjustment frame is slidably disposed within the bottom frame of the fixed frame and can be linked with the clamping wheel bracket;

[0024] The first elastic reset member is used to provide elastic force to the adjusting frame so as to reset the clamping wheel bracket;

[0025] When an external force is applied to make the adjusting frame slide upward, the adjusting frame drives the clamping wheel bracket to the flipped state; when the external force is released, the clamping wheel bracket is in the reset state.

[0026] Optionally, each of the one or more catheter clamping devices further includes:

[0027] The positioning plate is fixedly installed on the inner wall of the fixed frame;

[0028] A guide rod is fixedly disposed between the bottom frame of the fixed frame and the positioning plate, and is used to provide guidance for the sliding of the adjustment frame;

[0029] The first elastic reset element is sleeved on the guide rod.

[0030] Optionally, it also includes a damping adjustment component, which is configured to:

[0031] When the catheter rack moves upward, the clamping damping of the catheter clamping device on the catheter is increased;

[0032] When the catheter frame descends, the clamping damping is reduced.

[0033] Optionally, the damping adjustment assembly includes a movable plate and a transmission assembly;

[0034] The movable plate is laterally slidable within the guide frame and is used to adjust the clamping damping of the clamping wheel;

[0035] The transmission component is located between the main frame and the movable plate, and is used to convert the lifting motion of the catheter clamping device into the lateral motion of the movable plate.

[0036] Optionally, the transmission assembly includes:

[0037] A wire twister is connected to the bottom of the main frame, and the wire twister is equipped with a pull rope;

[0038] A flexible traction component, one end of which is connected to the end of the movable plate;

[0039] A transmission slider is slidably mounted on the main frame, with one end connected to the pull rope and the other end connected to the flexible traction member.

[0040] Optionally, the damping adjustment assembly further includes a second elastic reset member, which is connected to the movable plate and is used to provide a reset force to the movable plate.

[0041] Optionally, it also includes a height-adjustable locking assembly for adapting to beds of different heights, the height-adjustable locking assembly comprising:

[0042] At least two positioning brackets are spaced apart and fixedly installed on the back of the main body frame;

[0043] At least one fixed bracket is slidably disposed between the at least two positioning brackets;

[0044] A locking mechanism is used to lock the fixed bracket at a selected position relative to the main frame on the sliding path defined by the at least two positioning frames;

[0045] The back side is the side of the main frame that is away from the conduit.

[0046] In summary, the catheter anti-winding device provided in this application has the following technical advantages:

[0047] 1. Dynamic anti-entanglement: Through the power linkage between the drive shaft and gear set and the bed, the clamping height can be automatically adjusted synchronously with the patient's position, dynamically managing the catheter length.

[0048] 2. Safety and anti-pull: The mechanically linked damping adjustment component increases the clamping damping of the catheter clamping device on the catheter when the catheter rack rises, effectively locking the catheter and preventing slippage.

[0049] 3. Easy to operate: The clamping mechanism adopts a flip design of clamping wheel bracket, which can be quickly opened and closed to insert the tubing; flexible installation is achieved through a sliding and locking fixed bracket.

[0050] 4. Durable structure: It adopts a fully mechanical transmission and is equipped with a guide limit structure, which ensures smooth operation; the rolling clamping method reduces friction and reduces wear on the guide tube. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0052] Figure 1 A schematic diagram of the overall structure of the conduit anti-winding device provided in this application is shown;

[0053] Figure 2 A cross-sectional structural schematic diagram of the drive shaft, gear set, and guide frame portion of the present invention is shown;

[0054] Figure 3 The present invention is shown Figure 2 Enlarged structural diagram at point A in the middle;

[0055] Figure 4 A schematic diagram of the transmission shaft and drive gear involved in this invention is shown;

[0056] Figure 5 A cross-sectional structural schematic diagram of the catheter clamping device and damping adjustment assembly of the present invention is shown.

[0057] Figure 6 The present invention is shown Figure 5 Enlarged structural diagram at point B;

[0058] Figure 7 The present invention is shown Figure 5 Enlarged structural diagram at point C;

[0059] Figure 8 A schematic cross-sectional view of the height-adjustable locking assembly of the present invention is shown.

[0060] Marked in the image:

[0061] In the diagram: 100: main frame, 101: slide;

[0062] 200: Guide frame; 201: Adjusting frame; 202: Slide bar; 203: Adjusting plate; 204: Fixed frame; 205: Clamping wheel; 206: Adjusting bracket; 207: Limiting plate; 208: Clamping wheel bracket; 209: Positioning plate; 210: Guide rod; 211: Return spring; 212: Torsion spring shaft; 213: Movable column; 214: Inclined block; 215: Limiting disc; 216: Compression spring; 217: Guide clamping device; 218: Rack;

[0063] 300: Gear set; 301: Drive shaft; 302: Combination groove; 303: Drive gear; 304: Pinion; 305: Large gear; 306: Meshing gear; 307: Final stage gear.

[0064] 400: Catheter;

[0065] 401: Movable plate, 402: Twister fixing seat, 403: Twister, 404: Pull rope, 405: Connecting rope, 406: Transmission slider, 407: Tension spring, 408: Slanted groove;

[0066] 501: Positioning frame; 502: Fixed bracket; 503: Adjusting slide bar; 504: Adjusting slide groove; 505: Adjusting screw; 506: Adjusting disc; 507: Pressing disc; 508: Mounting hole. Detailed Implementation

[0067] In this specification, it will also be understood that when a component is referred to as being "coupled" or "connected" to other components relative to other components, the component may be directly connected to or directly coupled to the component, or there may be an intervening third component; in addition, in the embodiments of this application, "coupled" and "connected" are mainly mechanical structural connections or pipeline connections that form fluid communication.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] 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.

[0070] The present application will now be described more fully below with reference to the accompanying drawings, in which various embodiments are illustrated. However, the present application may be implemented in many different ways and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be exhaustive and complete, and will fully convey the scope of the present application to those skilled in the art. The same reference numerals denote the same parts throughout the drawings. Furthermore, in the drawings, the thickness, proportions, and dimensions of parts are enlarged for clarity.

[0071] In this article, "remaining basically unchanged" and "tending to be consistent" should be understood as follows: the lifting and lowering movement of the catheter holder is sufficient to offset the need for changes in catheter length caused by changes in patient position that may lead to catheter entanglement or pulling. Its adjustment precision does not need to reach absolute synchronization, as long as the clinical effects of preventing entanglement and pulling are achieved.

[0072] To address or improve upon the problems existing in the prior art, this application provides a catheter anti-entanglement device. Through a mechanical linkage system, the catheter clamping height is synchronized with the patient's bed position in real time, and the clamping damping is automatically adjusted during this process, thereby effectively preventing catheter entanglement and pulling. Figure 1 and Figure 2 As shown, it includes:

[0073] The main frame 100 has a guide structure extending longitudinally;

[0074] The catheter holder 200 is mounted on the main frame 100 and can move under the constraint of the guide structure; the catheter holder 200 includes one or more transversely arranged catheter clamping devices 217 and at least one rack 218, the catheter clamping devices can clamp the catheter longitudinally or release the clamped catheter;

[0075] Drive shaft 301 is used to connect with the lifting mechanism or backrest adjustment mechanism of the hospital bed, and

[0076] The gear set 300 includes a drive gear 303 and at least one final gear 307 that forms a transmission connection with the drive gear 303. The final gear 307 meshes with the rack 218, and the drive gear 303 is connected to the transmission shaft 301.

[0077] The gear set 300 and the rack 218 have a preset total transmission ratio, which is used to adapt the lifting range of the catheter holder 200 to the movement range of the bed mechanism.

[0078] In the aforementioned solution, by connecting the drive shaft 301 to the bed lifting mechanism or the backrest adjustment mechanism, the movement of the bed is converted into the lifting movement of the catheter holder 200 using a gear set and rack 218. The catheter holder 200 clamps or releases the catheter longitudinally. The follow-up movement of the catheter holder 200 to the patient's bed ensures that the relative position between the two remains essentially unchanged, preventing catheter entanglement between the catheter holder 200 and the patient. This solution effectively solves the problem in existing technologies where the fixed catheter length easily leads to entanglement, knotting, or tearing of the wound when the patient's position changes. It achieves automated adjustment of the catheter clamping height, effectively preventing catheter entanglement and greatly improving nursing efficiency and patient freedom of movement.

[0079] The total transmission ratio is configured to satisfy at least one of the following conditions:

[0080] When the backrest adjustment mechanism of the hospital bed is raised from the supine position to the semi-recumbent position, the lifting range of the catheter holder 200 is between 250mm and 400mm.

[0081] When the lifting mechanism of the hospital bed drives the overall lifting of the hospital bed, the lifting range of the catheter holder 200 tends to be consistent with the lifting range of the hospital bed.

[0082] Those skilled in the art will understand that the supine position refers to the bed backrest being laid flat, i.e., the angle between the bed backrest and the bed surface is 0°, and the semi-recumbent position refers to the bed backrest being laid flat, i.e., the angle between the bed backrest and the bed surface is 60°.

[0083] Specifically, the principle of "adaptation" can be determined based on a geometric model analysis of changes in patient position. When a patient rises from a supine position (0°) to a semi-recumbent position (e.g., 60°), their upper body can be approximated as a lever with the hip joint as the pivot point. The catheter is typically drawn from the patient's chest or upper abdomen, and this point will undergo a vertical displacement as the body is raised. One of the core objectives of this invention is to compensate for this vertical displacement through the synchronous lifting and lowering of the guide frame 200. .

[0084] The vertical displacement It can be estimated using the following formula: Where L is the effective arm length from the patient's center of rotation (approximately at the hip joint) to the corresponding body position below the catheter clamping point (usually the shoulder or upper chest). The angle at which the headboard of the hospital bed is raised.

[0085] Preferably, assuming a typical clinical scenario, the bed backrest is raised from 0 degrees to 60 degrees, and the transmission shaft (301) linked to this movement rotates accordingly by 180 degrees (i.e., 0.5 revolutions). For a typical adult patient, the effective arm length L is usually between 500mm and 600mm. The vertical displacement of the shoulder is calculated based on the ideal model. In to between.

[0086] However, in practical applications, because the mechanical axis of the hospital bed and the physiological axis of the human body are not completely aligned, the patient's body will slide slightly downward when sitting up; at the same time, the catheter itself also has a certain natural droop and redundancy when lying flat. Taking these practical factors into consideration, this device does not need to fully compensate for all the displacements calculated by the ideal model, but only needs to provide a stroke sufficient to tighten the redundant length and prevent the catheter from being pulled or compressed.

[0087] Based on the above clinical observations and engineering practices, the synchronous upward stroke of the catheter holder 200 during this process is set to approximately 300 mm, which is a reasonable target value that can effectively achieve the functions of anti-entanglement and anti-pull, and also conforms to the actual engineering design.

[0088] Therefore, in this preferred embodiment, the required total transmission ratio ( ) is set as:

[0089] = Drive shaft revolutions / Guide frame stroke = = ;

[0090] Those skilled in the art can accurately achieve this design goal based on the determined transmission ratio by reasonably selecting the number of teeth and module of each gear in the gear set 300, as well as the parameters of the final stage gear 307 and the rack 218, thereby ensuring the effectiveness of the device in clinical use.

[0091] In other embodiments, considering the differences in different models of hospital beds and patient body shapes, the catheter holder 200 can preferably be adjusted within the range of 250mm to 400mm during the process of raising the back of the hospital bed from 0 degrees to 60 degrees, which can achieve good catheter management results.

[0092] The device provided in this application mainly includes a main frame 100, a guide frame 200, and a gear set 300. It also includes a damping adjustment component and a height adjustment locking component. The structure and implementation of this device are described in detail below.

[0093] First, such as Figure 2 As shown, the main frame 100 serves as the main structure of the device and can provide constraints for the inner structure. The guide structure includes two slide grooves 101, which are arranged longitudinally along both sides of the main frame to serve as sliding tracks for the guide frame 200.

[0094] Secondly, the catheter holder 200 constitutes the functional execution and integration unit of this device. On the one hand, it is driven by the gear set 300 to move up and down to realize the dynamic adjustment of the catheter length; on the other hand, it integrates the catheter clamping device and the damping adjustment part, and is the terminal carrier that directly realizes the catheter anti-winding and anti-pull functions.

[0095] Specifically, such as Figure 2 As shown, the guide frame 200 includes an adjustment frame 201, with slide bars 202 arranged longitudinally on both sides. The slide bars 202 and the slide groove 101 are slidably engaged, so that the guide frame 200 can move up and down along the slide groove 101 of the main frame 100.

[0096] In addition, such as Figure 1 and Figure 5 As shown, the guide frame 200 also includes an adjustment plate 203, which is installed on the front of the adjustment frame 201 and fixedly connected to the adjustment frame 201, and is used to bear and transmit movement.

[0097] In addition, each of the one or more catheter clamping devices 217 includes:

[0098] Two clamping wheel brackets 208 are arranged opposite to each other, and each clamping wheel bracket 208 is provided with a clamping wheel 205. The clamping wheel brackets 208 can work in the reset state and the flip state.

[0099] When the clamping wheel bracket 208 is in the reset state, the clamping wheel 205 is in the clamping state, and the two opposing clamping wheels 205 are close to each other and their rims can make elastic contact to clamp the conduit 400. When the clamping wheel bracket 208 is in the flipped state, the clamping wheel 205 is in the non-clamping state, and the two opposing clamping wheels 205 are far apart and their rims are no longer in contact, thus releasing the clamped conduit 400.

[0100] In addition, each of the plurality of catheter clamping devices 217 further includes:

[0101] A fixed frame 204 is provided with a clamping wheel bracket 208 mounted on it;

[0102] The adjustment frame 206 is slidably set inside the bottom frame of the fixed frame 204 and can be linked with the clamping wheel bracket 208;

[0103] The first elastic reset element is used to provide elastic force to the adjusting frame 206 so as to reset the clamping wheel bracket 208;

[0104] When an external force is applied to make the adjusting frame 206 slide upward, the adjusting frame 206 drives the clamping wheel bracket 208 to be in the flipped state; when the external force is released, the clamping wheel bracket 208 is in the reset state.

[0105] Those skilled in the art will understand that the reset state in this document refers to the state in which the clamping wheel 205 is clamping the conduit, and the flip state refers to the state in which the clamping wheel support 208 is open, that is, the clamping wheel 205 is not clamping the conduit. The flip state is different from the flipping action.

[0106] The fixing frame 204 is mounted on the front side of the adjusting plate 203 and is fixedly connected to the adjusting plate 203. The fixing frame 204 constitutes the structural base, functional integration unit, and motion execution housing of a single independent clamping unit. The front side of the adjusting plate 203 refers to the side closest to the conduit 400.

[0107] The fixed frame 204 can be a frame-shaped, box-shaped, or plate-base integrated structure; any basic component that can achieve the same installation function falls under this concept.

[0108] In addition, each of the one or more catheter clamping devices also includes:

[0109] The positioning plate 209 is fixedly disposed on the inner wall of the fixing frame 204;

[0110] The guide rod 210 is fixedly disposed between the bottom frame of the fixed frame 204 and the positioning plate 209, and is used to provide guidance for the sliding of the adjustment frame 206;

[0111] In a specific embodiment, the first elastic reset element is a reset spring 211, which is sleeved on the guide rod 210.

[0112] In a specific embodiment, such as Figure 7 As shown, the fixing frame 204 of the catheter clamping device 217 has a pair of vertically sliding adjusting brackets 206 inside, which are horizontally installed on the inner bottom of the fixing frame 204 and extend outward. A pair of limiting plates 207 are respectively vertically installed on the pair of adjusting brackets 206 and respectively fixedly installed on the inner sides of the fixing frame 204. The clamping wheel bracket 208 is hinged to the limiting plate 207 through a torsion spring shaft 212, so that the clamping wheel bracket 208 can rotate around the shaft and has a tendency to automatically close under the action of the torsion spring. The clamping wheel 205 is rotatably installed on the clamping wheel bracket 208 through bearings or bushings, and the two constitute a linkage unit. When the clamping wheel bracket 208 opens and closes, it will directly drive the two clamping wheels 205 to approach or separate, thereby realizing the clamping and release of the catheter 400.

[0113] To ensure smooth sliding and automatic reset of the adjusting frame 206, a positioning plate 209 is horizontally provided on the inner wall of the fixed frame 204. This plate provides stable guide support for the adjusting frame 206 and a static force application point for the reset spring 211, thereby ensuring the accuracy of the clamping mechanism's movement and reliable reset. The upper surface of the positioning plate 209 has reinforcing ribs to improve its structural stability. The guide rod 210 passes sequentially through corresponding through holes on the adjusting frame 206 and the positioning plate 209, connecting them and providing guidance. A reset spring 211 is fitted onto the guide rod 210, with its two ends elastically abutting against the lower surface of the positioning plate 209 and the upper surface of the adjusting frame 206 (or the corresponding structure at the bottom of the fixed frame 204), providing an upward reset force for the adjusting frame 206.

[0114] The working process is as follows: When catheter 400 needs to be installed or replaced, medical staff push the adjusting frame 206 upward. The adjusting frame 206 slides upward along the guide rod 210 and compresses the return spring 211, simultaneously moving the limiting plate 207 and the clamping wheel bracket 208 hinged thereto upward. Figure 7As shown, the upper inner part of the fixed frame 204 and the contact part with the clamping wheel bracket 208 have an upwardly opening inclined structure. When the clamping wheel bracket 208 moves upward with the adjusting frame 206, its upper part will act against the inclined structure of the inner wall of the fixed frame 204, thus being pushed outward. Under the torque stored in the torsion spring shaft 212, the clamping wheel bracket 208 flips outward, causing the two clamping wheels 205 to separate, so as to facilitate the insertion or removal of the conduit. After the conduit 400 is placed inside the clamping wheel 205, the pushing force is removed. The restoring force of the return spring 211 drives the adjusting frame 206 to move downward automatically, thereby driving the clamping wheel bracket 208 to return to its original position and close, so that the two clamping wheels 205 close again, stably clamping the conduit 400.

[0115] In addition, such as Figure 7 As shown, a pair of movable columns 213 are movably arranged inside the upper end of the fixed frame 204. The movable column 213 can be understood as a movable "push rod", which functions to change the rotation damping of the clamping wheel 205 by axially pressing the shaft under specific working conditions. The movable column 213 is provided with a wedge block 214, a limiting plate 215 and a compression spring 216; wherein, the limiting plate 215 is fixedly sleeved on the outside of the movable column 213; the compression spring 216 is sleeved on the outside of the movable column 213, and its two ends elastically abut against the inner wall of the fixed frame 204 respectively.

[0116] The movable column 213 is axially slidably inserted into the guide hole at the upper end of the fixed frame 204. A limiting plate 215 is fixedly sleeved on the rod of the movable column 213, and a compression spring 216 is sleeved between the limiting plate 215 and the inner wall of the fixed frame 204. Under the elastic force of the compression spring 216, the movable column 213 is pushed to the outward retracted position under normal conditions. An inclined block 214 is also provided at the inner end of the movable column 213. Overall, the movable column 213 constitutes an axially movable "push rod"; during operation, it is driven to move toward the shaft end of the clamping wheel 205 and press against the rotating shaft of the clamping wheel 205 to increase the rotational damping of the clamping wheel 205, thereby increasing the clamping damping of the guide tube 400 and preventing the guide tube from sliding down.

[0117] In the aforementioned scheme, the movable column 213 is the "final execution and reset unit" of the linkage damping adjustment function. The limiting plate 215 can be a disc-shaped flange integrally formed with the movable column 213, or it can be a ring-shaped washer, snap ring, or any other equivalent structure that can form a radial protrusion to achieve the limiting function. It is fixed to the rod of the movable column 213 by interference fit, snap, or thread and is located in the inner cavity of the fixed frame 204. Its function is physical limiting. The compression spring 216 is sleeved on the outside of the movable column 213, with one end acting on the limiting plate 215 and the other end acting on the inner wall of the fixed frame 204 (or a fixed support). Its function is to provide the reset force. For the specific working process, please refer to the description of the linkage damping component below.

[0118] In addition, a combination groove 302 is provided at the end of the drive shaft 301. During operation, the drive shaft 301 is connected to the bed lifting mechanism or the back panel adjustment mechanism, and motion transmission can be carried out after connection.

[0119] The power transmission and motion conversion of this device are achieved through a gear set 300 and a rack 218. Its core function is to convert rotary drive into linear drive and perform speed matching. The gear set 300 and rack 218 have a preset overall transmission ratio, which is used to adapt the lifting range of the catheter holder 200 to the movement range of the bed's lifting mechanism or backrest adjustment mechanism. The gear set 300, connected to the drive shaft 301 and rack 218, is used to convert the rotational motion of the drive shaft 301 into the linear lifting motion of the catheter holder 200.

[0120] Preferably, the gear set includes:

[0121] The drive gear 303 is fixedly connected to the transmission shaft 301;

[0122] Pinion 304 meshes with drive gear 303;

[0123] The large gear 305 is coaxially and fixedly connected to the small gear 304;

[0124] The meshing gear 306 meshes with the large gear 305;

[0125] A pair of final stage gears 307 are spaced apart in the horizontal direction; one final stage gear 307 meshes with the large gear 305, and the other final stage gear 307 indirectly meshes with the large gear 305 through a meshing gear 306, so that the pair of final stage gears 307 rotate in opposite directions.

[0126] The specific transmission process is as follows: The drive gear 303, which is fixedly connected to the drive shaft 301, serves as the power input end and meshes with a small gear 304 to form the first-stage reduction gear pair. The large gear 305, which is coaxially fixed with the small gear 304, rotates synchronously, thereby obtaining a lower speed and a larger output torque.

[0127] The large gear 305 meshes with a meshing gear 306 to form a second-stage reduction gear pair, which further reduces speed and increases torque, and transmits the rotational motion to the next stage. The meshing gear 306 also meshes with a pair of symmetrically arranged final-stage gears 307, driving the pair of final-stage gears 307 to rotate synchronously at the same speed but in opposite directions.

[0128] Each final stage gear 307 has teeth on its outer circumference and meshes with a rack 218 on the inner side of a vertically arranged adjusting frame 201. When a pair of final stage gears 307 rotate synchronously in opposite directions under the drive of the meshing gear 306, their teeth act on the racks 218 on both sides of the adjusting frame 201, generating a pair of meshing forces of equal magnitude and opposite direction. These forces balance each other and ultimately combine into a stable driving force, propelling the adjusting frame 201 to move smoothly in a vertical linear motion along the slide groove 101.

[0129] In addition, the device also includes a damping adjustment component, which is used to construct a mechanical anti-slip mechanism that is linked to and synchronously triggered with the lifting and lowering motion, thereby automatically preventing the catheter from slipping due to gravity during dynamic adjustment and ensuring treatment safety.

[0130] The damping adjustment component is configured as follows:

[0131] When the catheter holder 200 moves upward, the clamping damping of the catheter clamping device 217 on the catheter 400 is increased;

[0132] When the guide frame 200 descends, the clamping damping is reduced.

[0133] Specifically, such as Figures 5 to 7 As shown, the damping adjustment assembly mainly includes a movable plate 401 and a transmission assembly. Figure 5 As shown, there are two movable plates. Each movable plate 401 is laterally slidable within a specific guide rail inside the adjusting plate 203. Each movable plate 401 has at least one inclined slot 408. Correspondingly, at the end of the movable column 213 located inside the fixed frame 204, an inclined block 214 is fixed, engaging with the inclined slot 408. The inclined surface of the inclined block 214 is embedded within the inclined slot 408. When the movable plate 401 slides laterally, the wall of the inclined slot 408, through its interaction with the inclined surface of the inclined block 214, converts the lateral movement of the movable plate 401 into a radial (i.e., axial) thrust on the inclined block 214 and the movable column 213, thereby driving the movable column 213 to move axially. It should be noted that the number of inclined slots 408 corresponds to the number of inclined blocks 214, and during the lateral movement of the movable plate 401, each inclined slot 408 on it only cooperates with its corresponding inclined block 214, that is, the movement range of the inclined slot 408 is limited to the position range of its corresponding inclined block 214.

[0134] The transmission assembly is connected between the bottom of the main frame 100 and the movable plate 401, and is used to convert the vertical displacement of the adjusting frame 201 relative to the main frame 100 into a pulling force that drives the movable plate 401 to slide laterally. Specifically, the transmission assembly includes:

[0135] The strander fixing seat 402 is fixedly installed on the bottom frame of the main frame 100 by bolt structure;

[0136] The strander 403 has a coilable pull rope 404 and an elastic element (such as a spiral spring) that provides winding force inside; the strander 403 is fixedly mounted on the strander mounting base 402 in the vertical direction.

[0137] The flexible traction component is specifically a connecting rope 405, one end of which is connected to the end of the movable plate 401. Although not shown in the figure, those skilled in the art will understand that the connecting rope 405 bypasses the pulley or guide post at the corner, thereby changing its direction and making its overall path L-shaped. In this embodiment, there are two connecting ropes 405, which are used to traction the lateral movement of the movable plate 401.

[0138] The transmission slider 406 is slidably mounted on a specific guide rail, groove, or smooth rod at the bottom or side of the main frame 100. One end of the transmission slider 406 is connected to the free end of the pull rope 404 of the strander 403, and the other end is connected to the connecting rope 405.

[0139] By setting a transmission slider 406 that can slide along the main frame 100, the pulling and releasing motion of the pull rope 404 is converted into a stable linear displacement, which is then accurately transmitted to the movable plate 401 through the connecting rope 405, thereby ensuring the reliability and consistency of the linkage action of the damping adjustment component.

[0140] The damping adjustment assembly further includes a second elastic reset element, which can be an elastic rope, a pneumatic spring, or a mechanical structure with similar function, such as a cam-torsion spring structure. In this embodiment, it is specifically a tension spring 407. One end of the tension spring 407 is fixed to the bottom of the inner side of the adjusting plate 203, and the other end is connected to the end of the movable plate 401 near the tension spring 407 via a rope-like connector or directly. The tension spring 407 provides an elastic tension to the movable plate 401 to restore it to its initial position, which corresponds to a low-damping state.

[0141] The work process is as follows:

[0142] When the gear set 300 drives the guide frame 200 to rise as a whole, the guide frame 200 and the bottom of the main frame 100 are relatively displaced, thereby pulling out the pull rope 404 of the strander 403. The tension of the pull rope 404 drives the transmission slider 406 to move, and the transmission slider 406 then pulls the movable plate 401 through the connecting rope 405, causing it to slide laterally against the tension of the tension spring 407. The sliding of the movable plate 401 pushes the inclined block 214 through its inclined slot 408, which in turn drives the movable column 213 to move towards the shaft end of the clamping wheel 205 and apply pressure, thereby increasing the clamping damping of the clamping wheel 205 and locking the guide 400 to prevent it from sliding down; conversely, when the guide frame 200 descends as a whole, the distance between it and the strander 403 shortens, and the tension on the pull rope 404 decreases. At this time, the restoring force of the tension spring 407 pulls the movable plate 401 back to its initial position. The movable column 213 retracts accordingly, relieving the pressure on the shaft end of the clamping wheel 205, reducing the clamping damping, and returning to a low-damping state. The stranding device 403 then uses its internal winding force to automatically retract the slack rope 404.

[0143] Finally, as Figure 1 and Figure 8 As shown, a height adjustment and locking assembly is provided on the back of the main frame 100, which is used to adapt to hospital beds of different heights and to achieve stable installation of the device.

[0144] The height adjustment locking assembly includes:

[0145] At least two vertically placed positioning brackets 501 are spaced apart and fixedly installed on the back of the main frame 100;

[0146] At least one fixed bracket 502 is slidably disposed between the at least two positioning brackets 501, and

[0147] A locking mechanism is used to lock the fixed bracket 502 at a selected position relative to the main frame 100 on a sliding path defined by at least two positioning brackets 501;

[0148] The back side is the side of the main frame 100 that is away from the conduit 400.

[0149] This embodiment includes three positioning frames 501 and two fixed supports 502. The fixed supports 502 are sheet metal bending parts or machined parts with an L-shaped cross-section, and are integrally or fixedly connected to a vertically arranged mounting plate and a horizontally arranged connecting plate. An adjusting screw 505 is rotatably mounted on the vertical mounting plate in the horizontal direction, and adjusting slides 503 are provided on both sides of the screw. The top of the horizontal connecting plate has at least two mounting holes 508 for finally fixing the entire device to a predetermined position on the hospital bed using bolts or other fasteners.

[0150] To achieve height adjustment, a vertically extending adjustment groove 504 is provided on the inner side of the positioning bracket 501. The fixed bracket 502 is inserted into the adjustment groove 504 through the adjustment strips 503 on both sides, so that it can slide in the vertical direction to adjust the overall installation height.

[0151] The height adjustment and locking are achieved through a locking mechanism, which includes an adjusting screw 505, an adjusting disc 506, and a pressing disc 507. One end of the adjusting screw 505 is equipped with the adjusting disc 506 for manual rotation, and the other end is fixedly connected to the pressing disc 507. Rotating the adjusting disc 506 drives the pressing disc 507 to move axially. When the fixed bracket 502 slides to the desired height, the adjusting disc 506 is tightened, causing the pressing disc 507 to press tightly against the back of the main frame 100. The resulting frictional torque locks the fixed bracket 502 between at least two positioning brackets 501 and onto the main frame 100.

[0152] The working principle and usage process of this invention will be explained in detail below with reference to the accompanying drawings:

[0153] First, the overall installation and height pre-adjustment of the device are performed. The operator holds the fixed bracket 502 and slides the adjusting slide bars 503 on both sides vertically along the adjusting slide grooves 504 on the positioning frame 501. During the sliding process, the height of the transmission shaft 301 fixed on the adjusting frame 201 changes accordingly until it is aligned with the target mounting shaft of the bed frame. Then, the adjusting disc 506 is rotated, driving the adjusting screw 505 to move axially, causing the pressing disc 507 at its end to press tightly against the back of the main frame 100, using the generated frictional torque to lock the relative position of the fixed bracket 502 and the main frame 100. Finally, the entire device is securely installed in the predetermined position on the bed frame using fasteners through the mounting holes 508 on the horizontal connecting plate of the fixed bracket 502.

[0154] After installation and height setting are completed, the catheter clamping operation is performed. Push the adjusting bracket 206 upwards, causing the clamping structure on it to move upwards as a whole. During this process, the clamping wheel bracket 208 unfolds outwards under the action of the torsion spring shaft 212, thereby placing the catheter 400 between the two sets of clamping wheels 205. After releasing the adjusting bracket 206, it moves downwards along the guide rod 210 under the push of the return spring 211, causing the two sets of clamping wheels 205 to clamp the catheter 400 from both sides.

[0155] When the bed frame is adjusted for height, the driving process is as follows: The movement of the bed frame drives the drive shaft 301 to rotate. The rotational power of the drive shaft 301 is transmitted sequentially through a two-stage reduction gear pair consisting of a drive gear 303, a pinion 304, a large gear 305, and a meshing gear 306, achieving speed reduction and torque increase. The meshing gear 306 drives a pair of final stage gears 307 to rotate synchronously at the same speed but in opposite directions. This pair of final stage gears 307 meshes with racks 218 vertically arranged on both sides of the adjustment frame 201, thereby converting the rotational motion into a balanced and stable linear driving force, pushing the adjustment frame 201 to rise and fall vertically along the slide groove 101 to compensate for changes in bed frame height and maintain a relatively constant duct reserve length.

[0156] Meanwhile, the lifting and lowering motion of the adjusting frame 201 is converted into a horizontal control force via the winch 403 and the pull rope 404. Specifically, when the adjusting frame 201 moves upward, the winch 403 pulls out the pull rope 404; the pull rope 404 pulls the transmission slider 406 to move horizontally against the force of the tension spring 407. The transmission slider 406 pulls the movable plate 401 via the connecting rope 405. The sliding of the movable plate 401 pushes the cooperating inclined block 214 through the inclined slot 408 on it, forcing the movable column 213 to move towards the shaft end of the clamping wheel 205, thereby increasing the clamping damping of the clamping wheel 205's rotation axis. This design allows for an automatic increase in the clamping force on the catheter 400 during dynamic adjustment of the bed frame to prevent slippage, while maintaining appropriate clamping in static conditions to protect the catheter.

[0157] In summary, the catheter anti-winding device provided in this application has the following beneficial technical effects:

[0158] 1. Achieves dynamic anti-entanglement and strong adaptability: This invention connects to the hospital bed via a drive shaft, and through gear and rack transmission, the height of the catheter holder can be synchronously and automatically adjusted according to changes in the patient's position (such as sitting up or turning over), thereby dynamically adjusting the reserved length of the catheter. This avoids the problems of twisting, crossing, and entanglement caused by a fixed catheter length, significantly reducing the probability of entanglement and flexibly adapting to different patient treatment postures and clinical scenarios.

[0159] 2. Provides reliable anti-pull protection and high safety: This invention, through a damping adjustment component, increases the clamping damping of the catheter clamping device when the patient sits up or the catheter stand rises, thereby effectively locking the catheter and preventing it from sliding downwards under gravity. This avoids catheter displacement or dislodgement, as well as pulling on the patient's wound due to catheter slippage, improving the safety of the treatment process and the patient's comfort.

[0160] 3. Convenient operation and improved nursing efficiency: The catheter clamping mechanism adopts a torsion spring shaft driven flip-up design for the clamping wheel bracket. Simply push the adjustment frame to open the clamping wheel bracket and insert the catheter; it automatically closes to clamp after release, simplifying catheter installation and replacement. Simultaneously, this device connects to the hospital bed via a sliding, adjustable, and locking fixed bracket, ensuring flexible and secure installation. The combination of these features makes the device highly adaptable, simplifies and speeds up nursing operations, and effectively improves the work efficiency of medical staff.

[0161] 4. Stable and reliable structure with long service life: The entire device adopts a fully mechanical transmission structure with no electronic components, resulting in a low failure rate. Each moving part is equipped with a guide and limit structure, such as slide bars and grooves, and guide rods, ensuring smooth and precise operation. Furthermore, the rolling clamping wheels use a rolling contact method to clamp the conduit, reducing friction and minimizing wear on the conduit body while maintaining a secure hold. This helps protect the integrity of the conduit and extends the service life of both the device and the conduit.

[0162] The above are merely some specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A catheter anti-winding device, characterized in that, include: The main frame (100) has a longitudinally extending guide structure; The catheter holder (200) is mounted on the main frame (100) and is capable of moving under the constraint of the guide structure; the catheter holder (200) includes one or more transversely arranged catheter clamping devices (217) and at least one rack (218), the catheter clamping devices being capable of longitudinally clamping the catheter (400) or releasing the clamped catheter (400); Drive shaft (301) is used to connect with the lifting mechanism or backrest adjustment mechanism of the hospital bed, and The gear set (300) includes a drive gear (303) and at least one final gear (307) that is connected to the drive gear (303) in a transmission connection. The final gear (307) meshes with the rack (218), and the drive gear (303) is connected to the transmission shaft (301). The gear set (300) and rack (218) have a preset total transmission ratio, which is used to make the lifting range of the catheter frame (200) adapt to the movement range of the lifting mechanism or backrest adjustment mechanism of the hospital bed.

2. The apparatus according to claim 1, characterized in that, The total gear ratio is configured to satisfy at least one of the following conditions: When the backrest adjustment mechanism of the hospital bed is raised from the supine position to the semi-recumbent position, the lifting range of the catheter holder (200) is between 250mm and 400mm. When the lifting mechanism of the hospital bed drives the entire hospital bed to rise and fall, the lifting range of the catheter holder (200) tends to be consistent with the lifting range of the hospital bed.

3. The apparatus according to claim 1 or 2, characterized in that, Each of the one or more catheter clamping devices (217) includes: Two clamping wheel brackets (208) are arranged opposite to each other, and each clamping wheel bracket (208) is provided with a clamping wheel (205). The clamping wheel brackets (208) can work in a reset state and a flipped state. When the clamping wheel bracket (208) is in the reset state, the clamping wheel (205) is in the clamping state, and the two opposing clamping wheels (205) are close to each other and their rims can make elastic contact to clamp the conduit (400). When the clamping wheel bracket (208) is in the flipped state, the clamping wheel (205) is in the non-clamping state, and the two opposing clamping wheels (205) are far apart and their rims are no longer in contact to release the clamped conduit (400).

4. The apparatus according to claim 3, characterized in that, Each of the one or more catheter clamping devices (217) further includes: A fixed frame (204) on which the clamping wheel bracket (208) is mounted; The adjustment frame (206) is slidably disposed within the bottom frame of the fixed frame (204) and can be linked with the clamping wheel bracket (208); The first elastic reset member is used to provide elastic force to the adjusting frame (206) so as to reset the clamping wheel bracket (208); When an external force is applied to make the adjusting frame (206) slide upward, the adjusting frame (206) drives the clamping wheel bracket (208) to be in the flipped state; when the external force is released, the clamping wheel bracket (208) is in the reset state.

5. The apparatus according to claim 4, characterized in that, Each of the one or more catheter clamping devices (217) further includes: The positioning plate (209) is fixedly installed on the inner wall of the fixed frame (204); The guide rod (210) is fixedly disposed between the bottom frame of the fixed frame (204) and the positioning plate (209) to provide guidance for the sliding of the adjustment frame (206); The first elastic reset element is sleeved on the guide rod (210).

6. The apparatus according to claim 1 or 2, characterized in that, It also includes a damping adjustment component, which is configured as follows: When the catheter holder (200) moves upward, the clamping damping of the catheter clamping device (217) on the catheter (400) is increased; When the catheter holder (200) descends, the clamping damping is reduced.

7. The apparatus according to claim 6, characterized in that, The damping adjustment assembly includes a movable plate (401) and a transmission assembly; The movable plate (401) is laterally slidable within the guide frame (200) and is used to adjust the clamping damping of the clamping wheel (205). The transmission component is located between the main frame (100) and the movable plate (401) and is used to convert the lifting motion of the catheter clamping device (217) into the lateral motion of the movable plate (401).

8. The apparatus according to claim 7, characterized in that, The transmission assembly includes: A stranding device (403) is connected to the bottom of the main frame (100), and the stranding device (403) is provided with a pull rope (404). A flexible traction component, one end of which is connected to the end of the movable plate (401); A transmission slider (406) is slidably mounted on the main frame (100). One end of the transmission slider (406) is connected to the pull rope (404), and the other end is connected to the flexible traction member.

9. The apparatus according to claim 8, characterized in that, The damping adjustment assembly further includes a second elastic reset member, which is connected to the movable plate (401) and is used to provide elastic reset force to the movable plate (401).

10. The apparatus according to claim 1 or 2, characterized in that, It also includes a height-adjustable locking assembly for adapting to beds of different heights, the height-adjustable locking assembly comprising: At least two positioning brackets (501) are spaced apart and fixedly disposed on the back of the main body frame (100); At least one fixed bracket (502) is slidably disposed between the at least two positioning brackets (501), and A locking mechanism for locking the fixed bracket (502) at a selected position relative to the main frame (100) on a sliding path defined by the at least two positioning brackets (501); The back side is the side of the main frame (100) away from the conduit (400).

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