Diabetic foot oxygen therapy device

Abstract

The utility model relates to a kind of diabetic foot oxygen therapy equipment, it includes shoe body, the shoe body includes several modules worn in different areas of foot, each module is spliced by the connecting component of being set along edge to form the combined structure of wrapping foot;Pressure flap, set to along edge outside, it is made of flexible material and continuously extends along module edge, realize the sealing of module inside and external environment;Wherein, the back of pressure flap is provided with support column formed by interval arrangement air flow gap, the side of pressure flap away from along edge extends and forms transition paste structure, the thickness of transition paste decreases from the combination end to the free end of another side, bottom surface is adhered skin surface profile, top surface forms inclined guide surface to improve sealing pressure.The utility model designs multiple detachable modules, so that diabetic patients with different conditions selectively wear corresponding modules on affected area, while effectively treating affected area, as far as possible avoid normal skin long-term contact pure oxygen.

Description

Technical Field

[0001] This utility model relates to the field of medical and nursing equipment technology, and in particular to an oxygen therapy device for diabetic foot. Background Technology

[0002] Diabetic foot is a serious complication caused by endocrine abnormalities, usually secondary to diabetic peripheral vascular disease, atherosclerosis, or thromboangiitis obliterans. In diabetic patients, insufficient blood supply to the feet due to vascular disease often leads to severe damage, ulcers, and even gangrene after infection. With the rising incidence of diabetes and an aging population, the incidence of diabetic foot is also increasing. Gangrene is often accompanied by anaerobic bacterial infection. Conventional antibiotic treatment is often ineffective due to poor local blood circulation, while high-concentration, high-pressure oxygen therapy has shown good efficacy in killing anaerobic bacteria and promoting tissue cell regeneration.

[0003] Local oxygen therapy is widely used in the treatment of diabetic foot. This therapy improves the hypoxic environment by increasing the local oxygen partial pressure, promoting cell metabolism and collagen synthesis, accelerating granulation tissue formation and angiogenesis, and has anti-infective effects. However, current diabetic foot oxygen therapy techniques usually treat the entire foot indiscriminately, resulting in prolonged exposure of not only the affected skin but also normal skin to a pure oxygen environment. Although short-term, moderate pure oxygen therapy has little impact on normal skin, considering the long treatment cycle of diabetic foot (the basic course is usually 4–6 weeks, 1–2 times daily, 1–4 hours each time; complex ulcers may require 8–12 weeks or longer), long-term exposure of normal skin to pure oxygen may cause some problems. For example, long-term exposure to high concentrations of oxygen can lead to oxidative stress damage to the skin, with free radicals attacking collagen fibers, accelerating skin aging and reducing elasticity. In addition, high concentrations of oxygen can accelerate the evaporation of moisture from the stratum corneum, causing dry skin and peeling. More importantly, prolonged exposure to a high-oxygen environment can inhibit the growth of resident anaerobic probiotics (such as Staphylococcus epidermidis) on the skin, disrupting the microbial barrier and increasing the risk of infection. For diabetic patients with poor skin microcirculation, their normal skin is more susceptible to these side effects. Therefore, when designing treatment plans for diabetic foot, special care must be taken to avoid unnecessary damage to normal skin.

[0004] CN207722081U discloses a diabetic foot oxygen therapy shoe, which uses an annular sealed airbag and shoe cover straps to construct a closed cavity for the foot, and achieves oxygen diffusion through the through holes on the suspended silicone rubber layer to inhibit the growth of anaerobic bacteria.

[0005] However, this technology has certain limitations in clinical application. First, it lacks the ability to regulate oxygen delivery to different areas of the diseased tissue and normal tissue during treatment, resulting in an inability to precisely deliver oxygen to the wound and potentially causing excessive oxidation in non-disease areas. Second, the gas distribution system is designed to support only vertical oxygen diffusion, making it difficult to effectively regulate oxygen concentration gradients in anatomically complex areas such as the intertoe spaces and plantar dome, thus affecting treatment efficacy. Furthermore, its rigid fixing ring is incompatible with the dynamic pressure distribution characteristics of the human body, and long-term use may lead to shear forces on bony prominences such as the ankle joint and dorsum of the foot, potentially inducing ischemic injuries. Finally, the passive insulation layer of this device lacks temperature feedback regulation capabilities and cannot utilize local thermal effects to improve microcirculation or enhance tissue oxygen utilization.

[0006] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0007] To address the shortcomings of existing technologies, this application proposes a diabetic foot oxygen therapy device, particularly a modular oxygen therapy shoe capable of supplying oxygen to the skin of diabetic foot lesions, aiming to solve one or more technical problems in the prior art.

[0008] This utility model relates to an oxygen therapy device for diabetic foot, which includes a shoe body comprising several modules worn on different areas of the foot. Each module is spliced ​​together by connecting components along its edge to form a combined structure that wraps around the foot. A pressure flap, located on the outer side along the edge, is made of flexible material and extends continuously along the edge of the module, achieving a seal between the inside of the module and the external environment through elastic deformation. The back of the pressure flap is provided with support columns, which are arranged at intervals to form airflow gaps. The side of the pressure flap away from the edge extends to form a transition patch structure. The thickness of the transition patch decreases from the end connected to the pressure flap to the free end on the other side. The bottom surface conforms to the contour of the skin surface, and the top surface forms an inclined guide surface to improve the sealing pressure.

[0009] This diabetic foot oxygen therapy device achieves precise adaptation to the affected area of ​​the foot through a modular shoe structure. The modules are flexibly combined via edge-connecting components, enabling localized oxygen therapy for different wound distributions in diabetic foot patients, effectively reducing pressure on healthy tissue. Specifically, flexible pressure flaps extend continuously along the module edges to form a dynamic sealing interface. Their elastic deformation characteristics maintain the airtightness of the oxygen therapy chamber while adapting to changes in the skin surface, avoiding the risk of localized pressure sores caused by traditional rigid sealing structures. An array of support columns creates a stable airflow gap between the pressure flaps and the skin contact surface, ensuring the stability of the positive pressure environment within the oxygen therapy chamber while maintaining gas exchange in the skin surface microenvironment through the gap channels, preventing skin ulceration caused by prolonged sealing. The gradient thickness variation and inclined guide surface design of the transition patch structure convert the pressure within the oxygen therapy chamber into uniformly distributed contact stress, thus preventing edge warping and seal failure during foot movement, ensuring the maintenance of oxygen concentration during treatment.

[0010] According to a preferred embodiment, the outer contours of each module form a supporting frame through the shoe upper, while the internal space forms an oxygen therapy cavity whose shape is adapted to the corresponding foot area through the covering shape of the shoe upper. The oxygen therapy cavity formed by the shoe upper can ensure that the foot lesion area is completely enveloped by a high-concentration oxygen environment. The airflow in the oxygen therapy cavity forms a uniform pressure field along the surface of the foot skin, which not only avoids local high pressure that may obstruct blood circulation, but also prevents air leakage at the edge of the cavity due to shape mismatch, thereby improving oxygen utilization efficiency and treatment effect.

[0011] According to a preferred embodiment, the shoe body includes a toe module. The upper of the toe module forms a semi-elliptical closed end, with a rectangular opening at its rear end. The height of the oxygen therapy chamber gradually decreases from the edge to the front end. The semi-elliptical closed end design of the toe module's upper closely conforms to the physiological curvature of the toes, providing stable support while avoiding localized pressure on the toe area. Its rounded transition shape at the front end effectively disperses the frictional stress generated during toe movement.

[0012] According to a preferred embodiment, the shoe body includes a sole module, with symmetrical arc-shaped extensions on both sides of the sole module's upper, forming an inwardly concave biomimetic curved surface at the arch of the foot. The biomimetic curved concave design at the arch matches the longitudinal arch shape of the foot, forming an airflow guiding channel consistent with the arch's contours. This allows high-pressure oxygen from the oxygen therapy chamber to naturally flow along the concave curved surface to the bottom of the arch, effectively covering the central area of ​​the sole where diabetic foot ulcers are common.

[0013] According to a preferred embodiment, the shoe body includes a heel module, the inner side of which is covered with a breathable mesh material, and a U-shaped opening is formed at the top. The U-shaped opening at the top precisely avoids the physiological prominence of the Achilles tendon, and the flexible wrapping structure at the edge of the opening reduces frictional resistance during Achilles tendon movement, thus maintaining stable oxygen therapy chamber pressure while preventing Achilles tendon epidermal damage caused by rigid contact.

[0014] According to a preferred embodiment, the shoe body includes a dorsal foot module. The upper of the dorsal foot module forms an arched oxygen therapy chamber, with its front end extending to the base of the metatarsal bones and its rear end forming an arc-shaped protective ring around the Achilles tendon. The arc-shaped protective ring formed by the rear end around the Achilles tendon conforms to the movement trajectory of the Achilles tendon through a flexible covering structure. During ankle flexion and extension, the elastic deformation of the protective ring adapts to the displacement of the Achilles tendon, avoiding skin damage caused by friction from rigid structures and maintaining the airtightness of the oxygen therapy chamber during dynamic activities. The arched chamber guides oxygen to gather in the central area of ​​the dorsum of the foot through its top arc-shaped curved surface. The laminar flow characteristics of the airflow along the arched curved surface form a stable pressure gradient, allowing high-concentration oxygen to evenly cover the ulcer-prone areas of the dorsum of the foot.

[0015] According to a preferred embodiment, each module of the shoe body is equipped with a pure oxygen interface on its upper. The pure oxygen interface includes: a main oxygen channel with a tapered nozzle structure at its outlet end; and an auxiliary exhaust channel forming an annular cavity surrounding the main oxygen channel and covered with an openable and closable film. When the main oxygen channel supplies air, the auxiliary exhaust channel simultaneously discharges air from the oxygen therapy cavity through the Venturi effect.

[0016] The tapered nozzle at the main oxygen channel outlet accelerates oxygen flow, forming a high-speed jet that generates a directional airflow within the oxygen therapy chamber to wash over the patient area. Simultaneously, the Venturi effect creates negative pressure at the inlet of the auxiliary exhaust channel, continuously expelling existing air from the chamber through the annular cavity, ensuring that the treatment space is rapidly filled with high-concentration oxygen. The closable membrane automatically adjusts its opening and closing state according to changes in the chamber pressure. When the oxygen concentration reaches the treatment threshold, the membrane closes due to the internal and external pressure difference, preventing gas leakage and maintaining a constant treatment pressure. When the oxygen environment needs to be refreshed, the negative pressure generated by the restarting main oxygen jet opens the membrane again for gas exchange.

[0017] According to a preferred embodiment, the outlet cross-sectional area of ​​the tapered nozzle is smaller than that of the inlet end, and the diaphragm opens towards the outside atmosphere. The Venturi effect generated by the reduced outlet cross-sectional area creates a continuous negative pressure adsorption force at the inlet of the auxiliary exhaust channel. Combined with the diaphragm's opening direction towards the outside atmosphere, this ensures that the gas displaced within the oxygen therapy chamber is stably discharged in a single direction, effectively avoiding pressure fluctuations caused by airflow disturbances.

[0018] According to a preferred embodiment, each module has a heating pad on the inner side of the shoe upper, and the heating pad is connected to an external power source through a power supply port penetrating the shoe upper. The heating pad conforms to the anatomical shape of the foot and distributes heat evenly, promoting local blood circulation to accelerate wound healing. At the same time, the stable power supply from the external power source maintains a constant thermotherapy effect, avoiding temperature fluctuations caused by power decay in traditional battery-powered devices.

[0019] According to a preferred embodiment, memory foam is embedded along the inner edge of the foot module, with its thickness distribution corresponding to the anatomical structure of the foot. The elastic deformation characteristics of the memory foam adaptively conform to the physiological curvature of the heel, arch, and forefoot, dispersing local pressure in weight-bearing areas through gradient thickness changes, thereby reducing the risk of skin shear force and pressure injury in areas prone to plantar ulcers. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a preferred oxygen therapy device of this utility model from a first-person perspective;

[0021] Figure 2 This is a schematic diagram of the overall structure of a preferred oxygen therapy device of this utility model from a second perspective;

[0022] Figure 3 This is a schematic diagram of the disassembly structure of a preferred oxygen therapy device according to this utility model;

[0023] Figure 4 This is a partial structural disassembly diagram of a preferred toe module of this utility model;

[0024] Figure 5 This is a partial structural disassembly diagram of a preferred foot module of this utility model;

[0025] Figure 6 This is a partial structural disassembly diagram of a preferred heel module of this utility model;

[0026] Figure 7 This is a partial structural disassembly diagram of a preferred instep module of this utility model;

[0027] Figure 8 This is a schematic diagram of a preferred pressure flap of this utility model when it is attached to the skin.

[0028] List of reference numerals

[0029] 100: Shoe body; 110: Toe module; 120: Sole module; 130: Heel module; 140: Instep module; 200: Edge; 210: Upper; 220: Oxygen therapy chamber; 230: Pure oxygen interface; 240: Power supply port; 250: Heating pad; 260: Memory foam; 300: Pressure flap; 310: Transition pad; 320: Support column. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings.

[0031] This embodiment relates to an oxygen therapy device for diabetic foot, such as... Figure 1 , Figure 2 As shown, the oxygen therapy device uses the shoe body 100 as the main structure. Its overall shape is modularly segmented and functionally designed according to the anatomical characteristics of the human foot. It achieves local oxygen therapy in the foot lesion area through the combination and collaborative work of multiple independent modules.

[0032] like Figure 3 As shown, the basic structure of the shoe body 100 includes four main modules: a toe module 110, a sole module 120, a heel module 130, and an instep module 140. The geometry of each module corresponds to a specific position on the foot. Its outer contour forms a supporting frame through a rigid upper 210, while the internal space is formed by the covering shape of the upper 210, creating an oxygen therapy cavity 220 with a specific shape. The modules are detachably physically connected via connecting components along the edge 200. These connecting components can be magnetic adsorption structures or adhesive tapes. The edge 200 serves as the boundary line for module splicing, with a width controlled within the range of 3–5 mm, continuously extending along the outer edge of the upper 210 to form a closed loop structure. The magnetic adsorption structure consists of multiple sets of micro-magnets embedded within the edge 200. When adjacent modules are joined, the edge 200 achieves rapid positioning and fixation through the principle of magnetic attraction between opposite poles. Adhesive tape serves as an auxiliary fixation method, covering the outside of the edge 200 with highly elastic medical tape and wrapped around the joint after module assembly to enhance structural stability. This modular design allows patients to flexibly select the required modules based on the distribution of wounds on their feet. For example, when ulcers exist on both the toe and heel, only the toe module 110 and heel module 130 need to be fixed to the corresponding locations, eliminating the need to wear the complete shoe body 100 structure, thus reducing pressure on healthy skin.

[0033] like Figure 3 As shown, the upper 210 of each module can define an oxygen therapy chamber 220 of different size and shape in space, thereby allowing the patient's foot to be treated in a local high-concentration, high-pressure oxygen environment within the oxygen therapy chamber 220. Preferably, the covering form and area of ​​the upper 210 of each module are different, and different modules form openings at specific positions by the upper 210 converging at the edge 200 according to their own functions, allowing the patient to insert the corresponding part of the foot into the oxygen therapy chamber 220 enclosed by the corresponding module through the opening, depending on the location of the affected skin area on the foot.

[0034] like Figure 4As shown, the toe module 110 is located at the front end of the shoe body 100. Its upper 210 adopts an arched curved surface design, forming a semi-elliptical closed end at the front end, and an approximately rectangular or semi-circular opening at the rear end along the junction of the dorsal side of the foot and the metatarsal bone. The volume design of the oxygen therapy chamber 220 fully considers the space for toe movement. The height of the oxygen therapy chamber 220 gradually decreases from the edge 200 of the upper 210 to the front end of the upper 210, forming a vertical gap of about 10-20mm at the highest point of the toe, ensuring that the airflow can flow around the toes during oxygenation. The splicing surface of the edge 200 of the toe module 110 is connected to the front edge of the sole module 120 and the lower edge of the instep module 140 through a magnetic adsorption structure. When spliced, the rear opening edge of the toe module 110 forms a continuous sealed interface with the edge 200 of the adjacent module.

[0035] like Figure 5 As shown, the sole module 120 serves as the main load-bearing component, and its upper 210 adopts a split structure. Specifically, the symmetrically arranged arc-shaped uppers 210 on both sides of the sole module 120 extend upwards to the arch of the foot, forming an inwardly concave biomimetic curved surface at the center of the foot. The vertical height of the oxygen therapy chamber 220 reaches its maximum value in the arch area, preferably 25-30mm. The edges 200 of the sole module 120 are distributed on the upper edge and the front and rear edges of the upper 210, with the front edge 200 connected to the edge 200 of the toe module 110 via a magnetic structure, and the rear edge 200 nested and docked with the front edge of the heel module 130.

[0036] like Figure 6 As shown, the heel module 130 has a semi-enclosed structure, with the upper 210 wrapping around the calcaneal region from back to front, and a U-shaped opening at the top to avoid the Achilles tendon area. Preferably, the oxygen therapy chamber 220 of the heel module 130 can be covered with a breathable mesh material at the calcaneal contact surface to promote local oxygen penetration. The edge 200 of the heel module 130 extends along the edge of the opening of the upper 210, the front edge 200 is connected to the rear edge of the sole module 120 by a magnetic adsorption structure, and the upper edge 200 can be overlapped and bonded to the lower edge of the instep module 140.

[0037] like Figure 7 As shown, the instep module 140 has an arc-shaped shell structure, and its upper 210 is of appropriate height to ensure that the patient's ankle area is exposed. Furthermore, the length of the instep module 140 ensures that one side of the upper 210 extends to the base of the toes, while the other side wraps around the Achilles tendon. The opening at the top of the instep is the same size as the opening of a conventional shoe, while the opening at the bottom is the same size as the new opening formed when the toe module 110, sole module 120, and heel module 130 are joined together.

[0038] like Figure 7As shown, the instep module 140 covers the area below the instep and ankle joint. Its upper 210 has a streamlined shell structure, extending to the base of the metatarsal bones at the front end and forming an arc-shaped protective ring with a height of approximately 30mm around the Achilles tendon at the rear end. The oxygen therapy chamber 220 forms an arched structure in the central area of ​​the instep module 140. The edges 200 of the instep module 140 are distributed around the bottom periphery of the upper 210. The front side is connected to the upper edge of the toe module 110 through a magnetic structure, the sides are nested and connected to the upper edge of the sole module 120, and the rear side forms a sealed interface with the upper edge of the heel module 130.

[0039] like Figure 8 As shown, the oxygen therapy device in this embodiment features pressure flaps 300 specially designed at the edges of each module, serving as sealing components for the oxygen therapy chamber 220. These pressure flaps 300 are made of flexible materials such as silicone, ensuring sufficient softness and elasticity to provide a good seal while closely conforming to the contours of the patient's foot. The pressure flaps 300 are continuously distributed along the entire length of the corresponding module edge, designed to replace the traditional method of direct contact between a hard edge and the patient's skin, thereby reducing the possibility of discomfort or injury caused by a hard edge. By increasing the contact area with the skin, the pressure flaps 300 effectively seal the space between the oxygen therapy chamber 220 and the external environment, significantly reducing the risk of gas leakage and improving the effectiveness and efficiency of oxygen therapy.

[0040] like Figure 8 As shown, the pressure flap 300 is constructed as a flexible pad that seamlessly connects to the edge of the module. Its shape can adaptively conform to the contour of the patient's foot, including the arch curvature, metatarsal region, and physiological curve of the heel, ensuring a smooth and natural fit during both static placement and dynamic micro-displacement. The front of this flexible pad is located inside the oxygen therapy chamber 220 of the module, forming a rigid connection with the internal structure of the device; the back directly contacts the patient's foot, serving as an isolation interface between the oxygen therapy chamber 220 and the external environment. The uniform distribution of sealing pressure is achieved through the elastic deformation of the flexible material.

[0041] Preferably, such as Figure 8 As shown, on the back of the pressure flap 300, flexible support columns 320 arranged in an array are further designed. These support columns 320 have a specific height, are truncated cones in shape, and are arranged in a honeycomb array. Their function is to reserve airflow gaps between the pressure flap 300 and the skin, preventing them from completely fitting together and forming a sealed contact. In addition to the truncated cone structure, equivalent designs can also use spaced fabrics, channel structures with airflow guiding functions, or porous materials with rough textures on the surface. Such designs can form gas exchange channels through physical gaps or porous structures, allowing the tiny chambers between the pressure flap 300 and the skin to remain connected to the outside atmosphere, maintaining internal and external pressure balance.

[0042] Given that the pressure of traditional pure oxygen local therapy is typically set at 105–108 kPa, slightly higher than the atmospheric pressure of 101.325 kPa, a pressure difference exists on both sides of the pressure flap 300. This pressure difference causes the entire flap to shift towards the skin along the length of its edge 200, achieving a close fit with the foot using internal positive pressure. This design achieves a dual effect through the elastic properties of the flexible material and the gap design of the support structure: on the one hand, the increased contact area, combined with the pressure dispersion effect of the support column 320, reduces local pressure concentration and lowers the risk of pressure sores on the foot due to prolonged pressure; on the other hand, the synergistic effect of the internal positive pressure and the sealing structure ensures the stability of the high-concentration oxygen environment within the oxygen therapy chamber 220, preventing leakage or poor fit from affecting the treatment effect.

[0043] Preferably, to further optimize the contact effect between the pressure flap 300 and the patient's foot skin, such as... Figure 8 As shown, a transition patch 310 structure is added to the edge of the pressure flap 300 away from the edge 200. This transition patch 310 adopts a wedge-shaped geometry, with a cross-section that is a trapezoid with a straight bottom and an inclined top. The thickness of the joint between the transition patch 310 and the pressure flap 300 is designed to be the sum of the thickness of the pressure flap 300 body and the height of the support column 320, ensuring a smooth transition of the total thickness after the three components are combined. The thickness of the free end in contact with the skin gradually decreases, forming a gradient change that gradually thins from the edge 200 towards the skin. The bottom surface of the transition patch 310 serves as the main pressure-bearing surface, perfectly conforming to the contour of the foot skin surface; the top surface extends upwards at an angle of 10–20°, forming a continuous airflow guiding surface together with the pressure flap 300. This sloping structure allows the high-pressure gas within the oxygen therapy chamber 220 to be decomposed into a normal pressure component perpendicular to the skin and a tangential pressure component extending along the sloping surface when acting on the top surface of the transition patch 310. The normal component enhances the tightness of the fit between the transition patch 310 and the skin, while the tangential component is absorbed by the flexible material through the elastic deformation of the pressure flap 300. This increases the contact area while avoiding shear stress on the epidermis. Furthermore, when the patient's foot movement causes relative displacement between the device and the skin, the change in shape of the transition patch 310 from thick to thin guides the dissipation of bending stress along its length, effectively preventing edge warping or local folding of the transition patch 310 and ensuring the continuity of the seal at the edge of the oxygen therapy chamber 220.

[0044] Preferably, such as Figure 2As shown, each module is equipped with a pure oxygen interface 230 on its upper 210 for filling the oxygen therapy chamber 220 with a high concentration of oxygen. Preferably, the pure oxygen interface 230 can be designed as an existing dual-channel valve structure, similar to the exhalation valve on a ventilator or oxygen mask. This valve has two channels: a main oxygen channel for delivering oxygen to the patient's airway, and an auxiliary exhaust channel that opens when the patient exhales to expel carbon dioxide. Accordingly, in this embodiment, the main oxygen channel of the pure oxygen interface 230 is located on its geometric central axis and runs through the entire interface. The inlet end adopts a cylindrical straight tube design for easy connection to an external oxygen supply pipeline; the outlet end is designed as a nozzle with a gradually decreasing cross-section, directly connected to the oxygen therapy chamber 220. This design enables high-speed oxygen injection, accelerating gas flow through the tapered nozzle. The auxiliary exhaust channel forms an annular channel with a concentric ring cavity around the outer wall of the main oxygen channel, used to simultaneously expel air from the oxygen therapy chamber 220 during oxygenation. The inner wall of the channel is covered with an openable and closable thin film, the outer side of which is open to the outside atmosphere. To ensure a snug fit when the device is worn, the exhaust outlet is located in the non-sealed area on the outer wall of the pure oxygen interface 230.

[0045] During the process of filling oxygen into the oxygen therapy chambers 220 of each module through the pure oxygen interface 230, the pure oxygen flow in the main oxygen channel is ejected at high speed from the external oxygen source through the converging nozzle, forming a high-speed jet. When the main oxygen jet passes through the converging nozzle, according to the Venturi effect, a negative pressure adsorption force is generated at the inlet of the auxiliary exhaust channel, causing the original air in the oxygen therapy chamber 220 to be drawn in and discharged outward through the auxiliary exhaust channel. As the pure oxygen concentration in the oxygen therapy chamber 220 increases, the internal air pressure gradually increases; when the air pressure approaches the target working pressure, such as 108 kPa, the flow velocity in the main oxygen channel decreases, and the Venturi effect weakens accordingly, resulting in a decrease in the negative pressure adsorption force of the auxiliary exhaust channel. At this time, due to the decrease in the internal and external pressure difference, the membrane passively closes, stopping the exhaust and maintaining the sealed state of the chamber.

[0046] Preferably, such as Figure 3 As shown, the module also has a power supply port 240 on the upper 210, which can be connected to a heating pad 250 located in the oxygen therapy chamber 220 inside the module. These heating pads 250 have built-in electric heating components, the specific layout of which can be seen in the diagram. Figures 4-7 For the toe module 110, sole module 120, and heel module 130, the heating pad 250 is placed on the inside of the upper 210 of the corresponding module; similarly, in the instep module 140, the heating pad 250 is also placed on the inside of the upper 210. Once the power supply port 240 is connected to an external power source, the corresponding part of the patient's foot can be heated, which helps to promote the wound healing process.

[0047] Preferably, such as Figure 3 As shown, the module can also be configured with memory foam 260, such as Figures 4-6 As shown, this memory foam 260 is embedded inside the upper 210 of the toe module 110, sole module 120, and heel module 130 to relieve local pressure on the foot and prevent potential skin ulceration. This design is particularly suitable for patients who use the device for extended periods, improving both comfort and safety.

[0048] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection scope. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A diabetic foot oxygen therapy device, characterized in that, include: The shoe body (100) includes several modules worn on different areas of the foot. Each module is spliced ​​together by connecting components set along its edge (200) to form a combined structure that wraps around the foot. Pressure flaps (300) are provided on the outside of the edge (200) and extend continuously along the edge of the corresponding module to isolate the interior of the corresponding module from the external environment; Among them, the back of the pressure flap (300) is provided with a number of support columns (320) that contact the skin; the side of the pressure flap (300) away from the edge (200) extends a transition patch (310) with a thickness decreasing from the joint end to the free end, so that the top surface of the transition patch (310) forms an inclined guide surface to improve the sealing pressure.

2. The oxygen therapy device according to claim 1, characterized in that, The outer contours of each module form a supporting frame through the shoe upper (210), while the internal space forms an oxygen therapy cavity (220) whose shape is adapted to the corresponding foot area through the covering shape of the shoe upper (210).

3. The oxygen therapy device according to claim 2, characterized in that, The shoe body (100) includes a toe module (110), the upper (210) of the toe module (110) forms a semi-elliptical closed end, and an opening is opened at its rear end. The height of the corresponding oxygen therapy chamber (220) gradually decreases from its edge (200) to the front end.

4. The oxygen therapy device according to claim 2, characterized in that, The shoe body (100) includes a foot sole module (120), and the upper (210) of the foot sole module (120) has arc-shaped extensions on both sides to form an inwardly concave biomimetic curved surface at the center of the foot.

5. The oxygen therapy device according to claim 2, characterized in that, The shoe body (100) includes a heel module (130), the inner side of the upper (210) of the heel module (130) is covered with a breathable mesh, and a U-shaped opening is provided at the top for the heel to insert.

6. The oxygen therapy device according to claim 2, characterized in that, The shoe body (100) includes a dorsal foot module (140), the upper (210) of the dorsal foot module (140) forming an arched oxygen therapy cavity (220), the front end of which extends to the base of the metatarsal bone, and the rear end surrounds the Achilles tendon to form an arc-shaped protective ring.

7. The oxygen therapy device according to claim 2, characterized in that, Each module of the shoe body (100) is equipped with a pure oxygen interface (230) on its upper (210), the pure oxygen interface (230) comprising: The main oxygen channel has a tapered nozzle structure at its outlet. The auxiliary exhaust channel forms an annular cavity surrounding the main oxygen channel and is covered with an openable and closable membrane; When the main oxygen channel supplies air, the auxiliary exhaust channel discharges the air from the oxygen therapy chamber (220).

8. The oxygen therapy device according to claim 7, characterized in that, The cross-sectional area of ​​the outlet end of the tapered nozzle is smaller than that of the inlet end, and the opening direction of the diaphragm is towards the outside atmosphere.

9. The oxygen therapy device according to claim 1, characterized in that, Each module has a heating pad (250) on the inside of the shoe upper (210), and the heating pad (250) is connected to an external power source through a power supply port (240) that passes through the shoe upper (210).

10. The oxygen therapy device according to claim 4, characterized in that, The foot module (120) has a memory foam (260) embedded on the inner side of its edge (200), and the thickness distribution of the foam corresponds to the foot structure.

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