A rheumatism external application device with auxiliary heating function
By combining an adaptive extrusion mechanism with a heat-conducting liquid circulation system, the problem of unstable fit of the external application device for rheumatism at joints with varying curvature has been solved, achieving uniform heat transfer and stable drug application, thus improving patient comfort and nursing effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE SECOND AFFILIATED HOSPITAL OF HUNAN UNIV OF TRADITIONAL CHINESE MEDICINE
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-31
AI Technical Summary
When existing external application devices for rheumatism are used on joints with significant curvature changes, the edges of the application layer are prone to lifting, resulting in localized gaps in the middle or sides, causing uneven heat transfer, drug spillage, and poor wearing stability.
An adaptive extrusion mechanism is adopted, including a central flexible dressing flap and multiple outer flexible dressing flaps, which are connected by flexible connectors. Combined with an elastic bladder and heat-conducting liquid circulation, it can achieve adaptive fitting of the joint surface and provide uniform heating through flexible auxiliary heating plates and power control modules.
It effectively reduces the lifting and hanging of the outer layer, improves the stability of drug contact with the skin and heat uniformity, and enhances the comfort and care effect.
Smart Images
Figure CN122478698A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical auxiliary device technology, specifically to a rheumatism external application device with auxiliary heating function. Background Technology
[0002] Patients with rheumatic diseases often use topical dressings, poultices, heating pads, or other therapeutic topical devices with auxiliary heating functions for local care when experiencing joint pain, swelling, or limited mobility. Existing topical devices for rheumatic diseases with auxiliary heating functions generally include a fixation layer, a heating layer, and a drug-carrying layer. During use, they are fixed to the affected area using adhesive, bandages, or protective coverings, ensuring the drug layer adheres closely to the skin. The heating layer provides heat to promote local blood circulation and drug penetration. These devices typically achieve stable adhesion and heating effects when used on relatively flat areas or areas with minimal curvature, such as the arms, legs, and back.
[0003] However, when patients apply topical patches or wraps to areas with significant curvature changes, such as the knee, elbow, and ankle joints, the joint surfaces are not regular planes. Furthermore, angles and curvatures continuously change during sitting, lying down, turning over, knee flexion, arm raising, or ankle movements. The existing sheet-like structure of topical devices struggles to compensate for deformation along the joint contour, easily leading to edge lifting and localized gaps in the middle or sides, creating gaps between the patch and the skin. These gaps result in uneven heat transfer from the auxiliary heating layer, reduced contact area between the drug-carrying layer and the skin, and consequently, problems such as localized heat leakage, localized cold areas, drug spillage, and poor wearing stability.
[0004] Therefore, it is necessary to provide a rheumatoid arthritis external dressing device that can adapt to changes in the curvature of bending joints, reduce the phenomenon of external dressing layer suspension and edge curling, and improve the uniformity of auxiliary heat. Summary of the Invention
[0005] The purpose of this invention is to provide a rheumatism external application device with auxiliary heating function, which solves the problem that the overall sheet structure of existing external application devices is difficult to be zoned and deformed according to the joint contour, which easily leads to the edge of the external application layer lifting up, and local suspension in the middle or on both sides, resulting in a gap between the external application surface and the skin.
[0006] The present invention solves the above-mentioned technical problems through the following technical solutions: the present invention includes an external binding mechanism, an adaptive compression mechanism, a heating mechanism, and a medicine application pack; The adaptive compression mechanism is located on the skin-proximal side of the outer binding mechanism, including a central flexible dressing flap and a plurality of outer flexible dressing flaps arranged around the central flexible dressing flap. Adjacent central flexible dressing flaps and outer flexible dressing flaps, as well as adjacent outer flexible dressing flaps, are connected by flexible connectors, so that the central flexible dressing flap and the plurality of outer flexible dressing flaps can deform relatively independently to conform to the joint surface. The dressing pack is detachably mounted on the skin-proximal side of the adaptive compression mechanism; The heating mechanism is mounted on the adaptive extrusion mechanism.
[0007] Preferably, both the central flexible dressing flap and the outer flexible dressing flap include an outer dressing sheet and an elastic bladder. The elastic bladder is located on the skin-proximal side of the outer dressing sheet. The outer dressing sheet and the edge of the elastic bladder are sealed together, forming a sealed flexible cavity between them. The flexible cavity is filled with a heat-conducting liquid.
[0008] Preferably, the flexible cavity of the central flexible dressing flap is provided with a rebound structure, and the two ends of the rebound structure abut against or connect to the outer dressing and the elastic capsule, respectively.
[0009] Preferably, the heating mechanism includes a power control module disposed on the distal side of the central flexible patch and at least one flexible auxiliary heating plate, wherein the flexible auxiliary heating plate is disposed in at least one of the flexible chambers for heating the heat-conducting liquid.
[0010] Preferably, the flexible auxiliary heating pads are configured as multiple, and the multiple flexible auxiliary heating pads are respectively located in the flexible cavities of the central flexible dressing flap and the multiple outer flexible dressing flaps.
[0011] Preferably, the number of the flexible auxiliary heating pads is one, and it is disposed in the flexible cavity of the central flexible dressing flap; or The number of flexible auxiliary heating pads is multiple, and they are only disposed in the flexible cavities of some of the external flexible dressing flaps, wherein only one of two adjacent external flexible dressing flaps is provided with the flexible auxiliary heating pad.
[0012] Preferably, the two adjacent external flexible dressing flaps are a front external flexible dressing flap and a rear external flexible dressing flap; An outflow one-way valve is provided in the flexible connector between the central flexible dressing flap and the front outer flexible dressing flap; a side flow one-way valve is provided in the flexible connector between the front outer flexible dressing flap and the rear outer flexible dressing flap; and an inflow one-way valve is provided in the flexible connector between the rear outer flexible dressing flap and the central flexible dressing flap. The outflow check valve allows the heat-conducting liquid to flow from the central flexible dressing flap into the front outer flexible dressing flap, the sideflow check valve allows the heat-conducting liquid to flow from the front outer flexible dressing flap into the rear outer flexible dressing flap, and the inflow check valve allows the heat-conducting liquid to flow back from the rear outer flexible dressing flap to the central flexible dressing flap.
[0013] Preferably, the outflow check valve, the sideflow check valve, and the inflow check valve have the same structure, specifically including a flow channel opened in the flexible connector and two flexible plates disposed in the flow channel. One end of each of the two flexible plates is fixedly connected to the inner wall of the flow channel, and the other end is in contact with each other and inclined toward the allowed flow direction.
[0014] Preferably, the outer binding mechanism includes a fixing net and binding straps fixed to both sides of the fixing net. The ends of the two binding straps are detachably connected by a connecting fastener. The fixing net is laid on the distal side of the adaptive extrusion mechanism.
[0015] Preferably, the power control module includes a socket disposed on the distal side of the central flexible dressing patch, the socket being electrically connected to the flexible auxiliary heating pad, and the socket being detachably connected to a power control box.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This device sets up a central flexible dressing flap and multiple outer flexible dressing flaps, and uses flexible connectors to allow each flap to deform relatively independently. It can adaptively fit the curved surfaces of joints with large curvature changes, such as the knee, elbow, and ankle joints, effectively reducing the lifting of the outer dressing edge and local suspension phenomenon.
[0017] 2. This device utilizes an elastic bladder and a flexible chamber filled with heat-conducting fluid. When a joint is bent or subjected to local pressure, the heat-conducting fluid in the pressure area can be transferred to a low-pressure or suspended area through a one-way valve, pushing the corresponding elastic bladder to expand towards the skin side, thereby compensating for the gap between the dressing pack and the skin and improving the adhesion stability of the dressing pack.
[0018] 3. This device heats the heat-conducting liquid by using flexible auxiliary heating plates set in the flexible chamber. Combined with the unidirectional circulation of the heat-conducting liquid between the central flexible patch and the outer flexible patch, the heat can be evenly distributed to each patch area, avoiding local overheating or local cold areas and improving the uniformity of auxiliary heating.
[0019] 4. This device combines a segmented conformal structure with a liquid circulation compensation mechanism, which can achieve an adaptive fit effect of "pressure area yielding and low pressure area compensation" during joint movement, reducing drug spillage and heat leakage, and improving the comfort and nursing effect of rheumatoid patients. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of the adaptive extrusion mechanism in the image; Figure 3 for Figure 2 A top-view sectional planar structural diagram; Figure 4 for Figure 2 A schematic diagram of the front sectional planar structure; Figure 5 for Figure 4 A magnified structural diagram at point A in the diagram.
[0021] The numbers in the diagram represent: 11-Banding strap; 12-Fixing net; 13-Connecting fastener; 2-Adaptive compression mechanism; 21-Central flexible dressing flap; 22-Outer flexible dressing flap; 23-Inner connecting elastic bar; 24-Side connecting elastic bar; 201-Outer dressing sheet; 202-Elastic bladder; 203-Rebound structure; 31-Inner flow one-way valve; 32-Side flow one-way valve; 33-Outer flow one-way valve; 301-Flow channel; 302-Flexible sheet; 41-Flexible auxiliary heating sheet; 42-Socket; 43-Power control box; 44-Snap fastener; 5-Medication pack. Detailed Implementation
[0022] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.
[0023] This embodiment provides a technical solution: a rheumatism external application device with auxiliary heat function, such as... Figures 1 to 5 As shown, the device includes an external binding mechanism, an adaptive compression mechanism 2, a heating mechanism, and a medicated dressing pack 5. The external binding mechanism is used to fix the device to the patient's knee, elbow, or ankle joints; the adaptive compression mechanism 2 is located on the skin-proximal side of the external binding mechanism and is used to apply the medication in sections according to changes in joint curvature; the heating mechanism is located on the adaptive compression mechanism 2 and is used to provide heat to the medicated area; the medicated dressing pack 5 is a thin, disc-shaped structure, which contains medication wrapped in non-woven fabric. The medicated dressing pack 5 is located on the skin-proximal side of the adaptive compression mechanism 2 and is used to directly adhere to the patient's skin for topical application of the medication.
[0024] The external binding mechanism includes a fixed net 12, with binding straps 11 fixed on both sides of the fixed net 12. The fixed net 12 is laid on the skin-distal side of the adaptive compression mechanism 2. The ends of the two binding straps 11 are detachably connected by a connecting fastener 13. The connecting fastener 13 can be Velcro, buckle, snap, or other detachable connection structure.
[0025] The fixing net 12 is a flexible mesh sheet used to distribute the tension of the strap 11, so that the adaptive compression mechanism 2 can press more evenly onto the patient's joint. After the strap 11 passes around the patient's limb, it is connected and fixed by the connecting fastener 13, thereby binding the entire device to the joint.
[0026] The adaptive compression mechanism 2 includes a central flexible dressing flap 21 and multiple outer flexible dressing flaps 22. The central flexible dressing flap 21 is located in the middle of the adaptive compression mechanism 2 and is used to cover the main external dressing area of the joint. The multiple outer flexible dressing flaps 22 are distributed in a ring around the outer side of the central flexible dressing flap 21 and arranged in a fan shape around the central flexible dressing flap 21. The central flexible dressing flap 21 is connected to each outer flexible dressing flap 22 by an inner connecting spring strip 23, and adjacent two outer flexible dressing flaps 22 are connected by a side connecting spring strip 24. The inner connecting spring strip 23 and the side connecting spring strip 24 are flexible connectors, both made of flexible materials, and can be compressed, bulged, bent, and relatively oscillated when the joint is bent, the bandage is tightened, or local pressure is applied, thereby improving the fit between the external dressing device and the joint surface.
[0027] Both the central flexible dressing flap 21 and the outer flexible dressing flap 22 include an outer dressing 201 and an elastic bladder 202. The elastic bladder 202 is located on the skin-proximal side of the outer dressing 201. The edge of the outer dressing 201 is sealed to the edge of the elastic bladder 202, forming a sealed flexible chamber between them. The flexible chamber is filled with a heat-conducting liquid, which can be water, glycerin aqueous solution, silicone oil, or other safe heat-conducting media suitable for use in human body external dressing devices. The elastic bladder 202 can bulge towards the skin-proximal side under the pressure of the heat-conducting liquid, thereby pushing the dressing pack 5 closer to the patient's skin.
[0028] A rebound structure 203 is provided in the flexible cavity of the central flexible dressing flap 21. The rebound structure 203 can be a spring, a rubber block or other elastic support. One end of the rebound structure 203 abuts against or is connected to the inner side of the outer dressing 201, and the other end abuts against the inner side of the elastic bladder 202. When the central flexible dressing flap 21 is compressed, the rebound structure 203 is compressed. When the external force decreases, the rebound structure 203 pushes the flexible cavity of the central flexible dressing flap 21 to return to its original position, thereby enhancing the rebound ability of the central flexible dressing flap 21 and promoting the return flow of the heat-conducting liquid.
[0029] The heating mechanism includes a flexible auxiliary heating plate 41 disposed in the central flexible dressing flap 21 or the outer flexible dressing flap 22, and a power control module disposed on the skin-distal side of the central flexible dressing flap 21. The flexible auxiliary heating plate 41 is used to heat the heat-conducting liquid in the flexible cavity and transfer the heat to the patient's skin through the heat-conducting liquid, the elastic bladder 202 and the dressing pack 5. The power control module is used to provide power to the flexible auxiliary heating plate 41 and control the operation of the flexible auxiliary heating plate 41.
[0030] Furthermore, to facilitate the use of the power control module, it includes a socket 42 disposed on the skin-distal side of the central flexible dressing flap 21. The socket 42 is electrically connected to the flexible auxiliary heating plate 41. A power control box 43 is inserted and disposed on the skin-distal side of the socket 42. Specifically, the socket 42 and the power control box 43 are assembled through a plug-in connector to achieve electrical connection. The socket 42 and the power control box 43 are detached and reattached through a snap-fit 44 on the outside to ensure the stability of the connection and the efficiency of detachment and reassembly.
[0031] The arrangement of the flexible auxiliary heating plate 41 can be selected according to actual needs, and there are three specific configuration options: The first method: There are multiple flexible auxiliary heating plates 41. Flexible auxiliary heating plates 41 are provided in the flexible chamber of the central flexible patch 21 and the flexible chambers of multiple outer flexible patch 22 to achieve direct heating in multiple areas. The second method: There is one flexible auxiliary heating plate 41. The flexible auxiliary heating plate 41 is set in the flexible cavity of the central flexible patch 21. The heat is transferred to multiple outer flexible patch 22 through the circulation of heat-conducting liquid. The third method involves multiple flexible auxiliary heating plates 41, but not every external flexible patch 22 is equipped with a flexible auxiliary heating plate 41. Instead, one of two adjacent external flexible patch 22 is selected to install a flexible auxiliary heating plate 41, so as to reduce energy consumption and structural complexity while ensuring the auxiliary heating effect.
[0032] The number of multiple external flexible dressing flaps 22 is preferably an even number, such as 6, 8, 10 or 12. In this embodiment, 8 external flexible dressing flaps 22 are used as an example. Two adjacent external flexible dressing flaps 22 are grouped together. For ease of understanding and reading, one external flexible dressing flap 22 in each group is defined as the front external flexible dressing flap 22, and the other external flexible dressing flap 22 is defined as the rear external flexible dressing flap 22.
[0033] An outflow check valve 33 is provided in the inner connecting spring strip 23 between the front outer flexible dressing flap 22 and the central flexible dressing flap 21. The outflow check valve 33 is used to allow the heat-conducting liquid in the central flexible dressing flap 21 to flow into the flexible chamber of the front outer flexible dressing flap 22. A side flow check valve 32 is provided in the side connecting spring strip 24 between the front outer flexible dressing flap 22 and the rear outer flexible dressing flap 22. The side flow check valve 32 is used to allow the heat-conducting liquid in the front outer flexible dressing flap 22 to flow into the flexible chamber of the rear outer flexible dressing flap 22. An inner flow check valve 31 is provided in the inner connecting spring strip 23 between the rear outer flexible dressing flap 22 and the central flexible dressing flap 21. The inner flow check valve 31 is used to allow the heat-conducting liquid in the rear outer flexible dressing flap 22 to flow back into the flexible chamber of the central flexible dressing flap 21.
[0034] Thus, a unidirectional circulation path is formed between each set of outer flexible dressing flaps 22 and central flexible dressing flaps 21 as follows: central flexible dressing flap 21 → outflow check valve 33 → front outer flexible dressing flap 22 → side flow check valve 32 → rear outer flexible dressing flap 22 → inflow check valve 31 → central flexible dressing flap 21, as shown Figure 5 As indicated by the middle arrow.
[0035] The internal flow check valve 31, the side flow check valve 32, and the external flow check valve 33 can have the same structure, differing only in their installation direction. A flow channel 301 is provided within the internal connecting spring 23 or the side connecting spring 24, allowing the heat-conducting liquid to pass through. Two flexible plates 302 are installed within the flow channel 301. One end of each flexible plate 302 is fixedly connected to the inner wall of the flow channel 301, while the other ends are inclined towards the center of the flow channel 301 and in contact with each other. The contact ends of the two flexible plates 302 face the side of the permissible flow direction of the liquid. When the heat-conducting liquid flows in the permissible direction, the liquid pressure pushes the contact ends of the two flexible plates 302 apart, opening the flow channel 301. When the heat-conducting liquid flows in the reverse direction, the reverse hydraulic pressure makes the contact ends of the two flexible plates 302 fit together more tightly, thereby preventing the liquid from flowing in the reverse direction.
[0036] The dressing pack 5 is positioned on the proximal side of the adaptive compression mechanism 2. The distal side of the dressing pack 5 is in contact with the elastic sacs 202 of the central flexible dressing flap 21 and the outer flexible dressing flap 22. The proximal side of the dressing pack 5 is used to adhere to the patient's skin. The dressing pack 5 can be fixed to the adaptive compression mechanism 2 by peripheral adhesion, local adhesion, or Velcro connection.
[0037] Preferably, the dressing pack 5 is fixed only at the edge or local position, so that the middle part of the dressing pack 5 can move towards the skin side as the elastic bladder 202 inflates, thereby increasing the contact area between the drug and the skin.
[0038] In use, the dressing pack 5 is aligned with the affected area of the patient's joint, and then the device is fixed to the joint area by the strap 11 and the connecting fastener 13. When the patient's joint is bent or subjected to local pressure, the flexible chambers of the central flexible dressing flap 21 and the corresponding outer flexible dressing flap 22 in the pressure area are compressed, and the pressure of the heat-conducting liquid in the corresponding flexible chamber increases. Under the action of pressure, the heat-conducting liquid flows in a predetermined direction through the outward one-way valve 33, the side-flow one-way valve 32, or the inward one-way valve 31, and enters the flexible chamber of the outer flexible dressing flap 22 with lower pressure. After the liquid enters, the elastic bladder 202 of the outer flexible dressing flap 22 expands towards the skin, thereby pushing the dressing pack 5 to compensate for the gap between the skin and the device. Thus, the device can achieve an adaptive fitting effect of "pressure area yielding and low-pressure area compensation" during joint bending.
[0039] When the heat distribution within the flexible cavities of multiple external flexible dressing flaps 22 is uneven, the circulation of the heat-conducting fluid can be promoted by the patient's joint movements or by manually pressing the power control box 43. When the power control box 43 is manually pressed, it applies pressure to the central flexible dressing flap 21 through the socket 42, causing the flexible cavity of the central flexible dressing flap 21 to contract. The heat-conducting fluid within the central flexible dressing flap 21 enters the corresponding external flexible dressing flap 22 through the outward flow one-way valve 33, and then flows into the adjacent external flexible dressing flap 22 through the side flow one-way valve 32. After releasing the power control box 43, the central flexible dressing flap 21 resets under the action of the rebound structure 203, its flexible cavity expands, and the heat-conducting fluid flows back to the central flexible dressing flap 21 through the inward flow one-way valve 31. In this reciprocating process, the heat-conducting fluid continuously circulates, thereby driving the heat to diffuse between the central flexible dressing flap 21 and multiple external flexible dressing flaps 22, improving the overall uniformity of auxiliary heating.
[0040] In this embodiment, a segmented conformal structure is formed by the central flexible dressing flap 21, the outer flexible dressing flap 22, the inner connecting elastic strip 23, and the side connecting elastic strip 24, enabling the device to adapt to the complex curved surfaces of bending joints.
[0041] The elastic bladder 202, flexible chamber, internal flow check valve 31, side flow check valve 32 and external flow check valve 33 form a liquid one-way circulation structure, which allows the liquid in the pressurized area to be transferred to the suspended or low-pressure area, thereby pushing the dressing pack 5 to re-adhere to the skin.
[0042] The auxiliary heating function is achieved through the flexible auxiliary heating plate 41, the socket 42, and the power control box 43, and the heat is diffused by liquid circulation to improve the uniformity of heat transfer. Ultimately, this device can reduce the curling, hanging, and heat leakage of the outer layer, and improve the contact stability between the dressing pack 5 and the skin. It is suitable for use in the care of rheumatic disease sites with large curvature changes, such as the knee, elbow, and ankle joints.
[0043] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.
Claims
1. A topical application device for rheumatism with auxiliary heat function, characterized in that, It includes an external binding mechanism, an adaptive compression mechanism (2), a heating mechanism, and a medicine pack (5); The adaptive compression mechanism (2) is located on the skin-proximal side of the outer binding mechanism, including a central flexible dressing flap (21) and a plurality of outer flexible dressing flaps (22) arranged around the central flexible dressing flap (21). The adjacent central flexible dressing flaps (21) and the outer flexible dressing flaps (22) are connected by flexible connectors, so that the central flexible dressing flaps (21) and the plurality of outer flexible dressing flaps (22) can deform relatively independently to conform to the joint surface. The dressing pack (5) is detachably disposed on the skin-proximal side of the adaptive compression mechanism (2); The heating mechanism is mounted on the adaptive extrusion mechanism (2).
2. The external application device for rheumatism with auxiliary heat function according to claim 1, characterized in that, Both the central flexible dressing flap (21) and the outer flexible dressing flap (22) include an outer dressing (201) and an elastic bladder (202). The elastic bladder (202) is located on the skin side of the outer dressing (201). The outer dressing (201) and the elastic bladder (202) are sealed together at their edges, forming a sealed flexible cavity. The flexible cavity is filled with a heat-conducting liquid.
3. The external application device for rheumatism with auxiliary heat function according to claim 2, characterized in that, The flexible cavity of the central flexible dressing flap (21) is provided with a rebound structure (203), and the two ends of the rebound structure (203) abut against or connect to the outer dressing (201) and the elastic capsule (202) respectively.
4. The external application device for rheumatism with auxiliary heat function according to claim 2, characterized in that, The heating mechanism includes a power control module disposed on the distal side of the central flexible patch (21) and at least one flexible auxiliary heating plate (41), wherein the flexible auxiliary heating plate (41) is disposed in at least one of the flexible chambers and is used to heat the heat-conducting liquid.
5. The external application device for rheumatism with auxiliary heat function according to claim 4, characterized in that, The flexible auxiliary heating pads (41) are configured in multiple ways, and the multiple flexible auxiliary heating pads (41) are respectively located in the flexible cavity of the central flexible dressing flap (21) and the multiple outer flexible dressing flaps (22).
6. The external application device for rheumatism with auxiliary heat function according to claim 4, characterized in that, The number of the flexible auxiliary heating plate (41) is one, and it is disposed in the flexible cavity of the central flexible patch (21); or The number of the flexible auxiliary heating pads (41) is multiple, and they are only disposed in the flexible cavity of some of the external flexible dressing flaps (22), wherein only one of two adjacent external flexible dressing flaps (22) is provided with the flexible auxiliary heating pads (41).
7. The external application device for rheumatism with auxiliary heat function according to any one of claims 1-6, characterized in that, The two adjacent external flexible dressing flaps (22) are a front external flexible dressing flap (22) and a rear external flexible dressing flap (22). An outflow check valve (33) is provided in the flexible connector between the central flexible dressing flap (21) and the front outer flexible dressing flap (22), a side flow check valve (32) is provided in the flexible connector between the front outer flexible dressing flap (22) and the rear outer flexible dressing flap (22), and an inflow check valve (31) is provided in the flexible connector between the rear outer flexible dressing flap (22) and the central flexible dressing flap (21). The outflow check valve (33) allows the heat-conducting liquid to flow from the central flexible patch (21) into the front outer flexible patch (22), the sideflow check valve (32) allows the heat-conducting liquid to flow from the front outer flexible patch (22) into the rear outer flexible patch (22), and the inflow check valve (31) allows the heat-conducting liquid to flow back from the rear outer flexible patch (22) to the central flexible patch (21).
8. The external application device for rheumatism with auxiliary heat function according to claim 7, characterized in that, The outflow check valve (33), the side flow check valve (32), and the inflow check valve (31) have the same structure. Specifically, they include a flow channel (301) opened in the flexible connector and two flexible pieces (302) set in the flow channel (301). One end of the two flexible pieces (302) is fixedly connected to the inner wall of the flow channel (301), and the other end is in contact with each other and inclined towards the allowed flow direction.
9. The external application device for rheumatism with auxiliary heat function according to claim 1, characterized in that, The outer binding mechanism includes a fixed net (12) and binding straps (11) fixed on both sides of the fixed net (12). The ends of the two binding straps (11) are detachably connected by a connecting fastener (13). The fixed net (12) is laid on the skin-distal side of the adaptive extrusion mechanism (2).
10. The external application device for rheumatism with auxiliary heat function according to claim 4, characterized in that, The power control module includes a socket (42) disposed on the skin-distal side of the central flexible dressing flap (21), the socket (42) being electrically connected to the flexible auxiliary heating plate (41), and the socket (42) being detachably connected to a power control box (43).