Lower limb blood vessel elevating pillow with active deformation support surface

Abstract

The utility model relates to the technical field of device of promoting patient, provide a kind of lower limb blood vessel raising pillow with active deformation support surface, including pillow main part, partitioned air bag subassembly, pressure acquisition component and gas circuit control component.Partitioned air bag subassembly is arranged in pillow main part, and the side towards pillow main part forms U-shaped contact end face, and pressure acquisition component is set to U-shaped contact end face, and gas circuit control component is connected partitioned air bag subassembly by pipeline, and gas circuit control component is adjusted to linearly adjust the lifting height of air bag.Partitioned air bag subassembly includes U-shaped air bag and the wet heat guide layer of contact end face being arranged in it, and U-shaped air bag is arranged along pillow main part width direction.Wet heat guide layer includes moisture-permeable layer and micro-negative pressure moisture absorption cavity, and micro-negative pressure moisture absorption cavity covers on U-shaped air bag upper surface and is communicated with the micro-negative pressure end of gas circuit control component.The utility model has the advantages of high practicability, good and strong wet-removing capacity.

Description

Technical Field

[0001] This utility model relates to the field of devices for lifting patients, and more particularly to a lower limb vascular elevation pillow with an active deformation support surface. Background Technology

[0002] In the nursing and rehabilitation of patients with varicose veins, deep vein thrombosis prevention, postoperative lower limb edema, and chronic venous insufficiency, medical staff often need to elevate the lower limbs to promote venous return, reduce venous pressure, and improve limb edema. However, patients are quite sensitive to the height of lower limb support and the distribution of force. If the elevation angle is singular or the support distribution is uneven, local compression in the popliteal fossa, gastrocnemius muscle, or Achilles tendon area can easily occur, leading to unsatisfactory venous return, poor comfort, or even positional intolerance. Existing lower limb elevation pads mostly adopt a single wedge-shaped or fixed foam structure, which can achieve basic elevation, but it is difficult to simultaneously take into account zoned support, pressure buffering, and adaptive adjustment according to changes in the patient's condition.

[0003] For example, Chinese patent CN203524908U discloses a medical lower limb elevation pad, which is a lower limb elevation pad integrally formed with the thigh, calf, and popliteal fossa. Through different slopes and groove structures, it can naturally elevate the affected limb and reduce the risk of slippage, which can improve venous return to a certain extent. The main support structure of this solution is a fixed foam structure, and its support surface shape remains basically unchanged during use. It cannot actively perform micro-deformation according to the different calf circumference, edema degree, and local pressure differences of different patients. It can only provide a preset static geometric support, and its adaptability to patients who are bedridden for a long time or whose edema fluctuates greatly is limited.

[0004] Another typical example is the lower limb elevation pad disclosed in Chinese patent N205867014U. This design proposes three air bladders (front, middle, and rear) between the upper and lower pads, forming a lower limb placement groove on the upper surface. By adjusting the inflation state of the air bladders, the overall elevation angle and height can be changed, improving the pressure on the lower limbs. While this solution offers some adjustability compared to a completely fixed foam pad, the air bladders are primarily used for adjusting the overall height and slope, still relying mainly on "overall cavity lifting and lowering." It lacks fine-grained division and independent deformation control for different areas of the lower leg, and it doesn't establish an adaptive compensation mechanism for changes in local pressure. Therefore, there is still room for improvement in terms of comfort and venous return efficiency.

[0005] In addition, existing technologies generally still have the following shortcomings:

[0006] 1. Most lower limb elevation devices can only achieve coarse adjustment of the overall angle or overall height, and cannot provide independent zone support for different areas such as the upper part of the lower leg, the middle part of the lower leg, and the ankle.

[0007] 2. The support surface of traditional memory foam / sponge structures is mostly static, lacking flexible pressure reduction and active adaptation capabilities, and cannot compensate for slight deformation in response to local pressure changes of users;

[0008] 3. Although existing support devices can provide simple angle changes, they have not formed a physical closed-loop mechanism of "pressure sensing - deformation compensation - stable support", which makes it difficult to improve the efficiency of lower limb venous return.

[0009] 4. In scenarios where patients require long-term bed rest or have severe postoperative edema, there is still a lack of an elevation device that simultaneously provides zoned support, active deformation compensation, and stable angle control.

[0010] This utility model was developed to address the common problems in this field, such as uneven zone support, fixed overall slope, lack of adaptive pressure adjustment, high risk of local compression, and difficulty in coping with different body shapes. Utility Model Content

[0011] The purpose of this invention is to address the shortcomings of current inventions by proposing a lower limb vascular elevation pillow with an active deformation support surface.

[0012] In order to overcome the shortcomings of the existing technology, the present invention adopts the following technical solution:

[0013] A lower limb vascular elevation pillow with an active deformation support surface, the lower limb vascular elevation pillow includes a pillow body, a partitioned airbag assembly, a pressure acquisition assembly, and an airway control assembly. The partitioned airbag assembly is disposed inside the pillow body and has a U-shaped contact end face on one side facing the pillow body. The pressure acquisition assembly is disposed on the pillow body and the U-shaped contact end face. The airway control assembly is pipe-connected to the partitioned airbag assembly and linearly adjusts the elevation height of the partitioned airbag assembly.

[0014] The partitioned airbag assembly includes U-shaped airbags and a heat-conducting layer disposed on the contact surface of the U-shaped airbags. The U-shaped airbags are arranged along the width of the pillow body, and each U-shaped airbag has a U-shaped arc structure that surrounds the lower limbs. The heat-conducting layer includes a moisture-wicking and permeating layer and a micro-negative pressure moisture-absorbing chamber. The micro-negative pressure moisture-absorbing chamber covers the upper surface of the U-shaped airbags and is connected to the micro-negative pressure end of the airway control assembly. The moisture-wicking and permeating layer is laid on top of the micro-negative pressure moisture-absorbing chamber and is in direct contact with the patient's skin.

[0015] The diffused moisture in the moisture-permeable layer is continuously drawn in by the micro-negative pressure end of the air path control component through the micro-negative pressure moisture absorption chamber, thereby forming an active moisture and heat migration path from top to bottom.

[0016] Optionally, the partitioned airbag assembly is divided into at least three independent support partitions along the length of the pillow body, corresponding to the ankle section, the middle section of the lower leg, and the upper section of the lower leg, respectively. The U-shaped airbag in each support partition is connected to the air path control assembly through an independent inflation and deflation passage.

[0017] Optionally, each U-shaped airbag includes a bottom support section and left and right wrapping sections. The height of the left and right wrapping sections is greater than the height of the bottom support section, and the left and right wrapping sections form a wrapping and supporting structure for both sides of the lower limbs when inflated.

[0018] Optionally, the micro-negative pressure moisture absorption chamber is a flexible and breathable chamber with supporting ribs inside, which is used to maintain the stability of the chamber thickness and maintain a continuous moisture and heat migration channel under negative pressure suction.

[0019] Optionally, the moisture-heat-conducting layer further includes a moisture-dissipating channel structure disposed below the moisture-dissipating and penetrating layer. The moisture-dissipating channel structure extends along the width direction of the pillow body and guides the moisture migrated from the micro-negative pressure moisture absorption chamber to the side discharge area of ​​the pillow body.

[0020] Optionally, it also includes a pressure indicator component, the pressure acquisition component being electrically connected to the pressure indicator component, the pressure indicator component being disposed on the side of the pillow body.

[0021] Optionally, the pressure acquisition component includes multiple pressure sensing units arranged along the corresponding support area of ​​the U-shaped airbag. The pressure sensing units are located below the heat-conducting moisture-wicking layer and fixed on the support base layer inside the pillow body. The lower limb pressure on the moisture-wicking and penetrating layer can be transmitted to the pressure sensing units through the heat-conducting moisture-wicking layer, and the pressure distribution data is transmitted to the pressure indication component.

[0022] Optionally, in addition to providing positive or normal pressure regulation to the partitioned airbag assembly, the air path control component also synchronously outputs pulsed or continuous low negative pressure to the micro-negative pressure moisture absorption chamber.

[0023] Optionally, the upper surface of the U-shaped airbag of the partitioned airbag assembly is provided with a positioning structure, and the heat conduction layer is provided with a corresponding fixing fastener. The heat conduction layer is detachably installed on the positioning structure through the fixing fastener.

[0024] Optionally, the air circuit control component includes an inflation pump, a pressure relief valve, a check valve, a throttle orifice, and a branch solenoid valve. The output end of the inflation pump passes through the pressure relief valve and the check valve in sequence before entering the branch solenoid valve. Each branch solenoid valve corresponds to a different U-shaped airbag assembly. A throttle orifice is provided downstream of each branch port and connected to the corresponding U-shaped airbag assembly, and the gas flow rate and velocity entering the U-shaped airbag assembly are finely adjusted.

[0025] The beneficial effects achieved by this utility model are:

[0026] 1. By combining the heat and moisture conduction layer on the partitioned airbag assembly with the micro-negative pressure of the airway control assembly, the skin sweat and heat can form a continuous diffusion, conduction, and negative pressure extraction path, ensuring that the contact surface of the entire device remains dry during long-term use and reducing the risk of skin maceration or redness.

[0027] 2. Through the cooperation of the pillow body and the partitioned airbag assembly, the overall lifting angle is formed by the combined deformation of multiple U-shaped airbags. Different slope curves can be achieved according to the patient's body shape and nursing needs, rather than the single fixed slope of the traditional wedge-shaped pad, ensuring that the entire device has a flexible and adjustable lifting curve.

[0028] 3. Through the combination of the U-shaped airbag covering structure and independent zone adjustment, each zone can automatically match the support deformation according to the patient's calf circumference and ankle width, ensuring that the entire device can adapt to different body types without changing the pillow body;

[0029] 4. Through the cooperation of the zoned airbag assembly and the airway control assembly, different support zones can be independently inflated and deflated, ensuring that the entire device can provide differentiated coverage and support for the ankle, mid-calf, and upper calf, thereby significantly improving the uniformity of zoned support.

[0030] 5. Through the cooperation between the pillow body, the zoned airbag assembly, the pressure acquisition assembly, the air path control assembly, and the pressure indicator assembly, the lower limb support process can form a closed-loop control system of support structure, pressure detection, active adjustment, and feedback display, ensuring that the entire device has the advantages of uniform zoned support, adjustable lifting height, dynamic controllable pressure, and significantly enhanced safety. Attached Figure Description

[0031] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate the same parts.

[0032] Figure 1 This is a schematic diagram illustrating the usage scenario of the user's lower limbs and the main body of the pillow according to this utility model.

[0033] Figure 2 This is a left-side view of the entire pillow body of this utility model.

[0034] Figure 3 for Figure 2 A partial cross-sectional view of section AA (between the two U-shaped airbags in the accommodating groove).

[0035] Figure 4 for Figure 3Enlarged schematic diagram of section B.

[0036] Figure 5 for Figure 3 Enlarged diagram of section C.

[0037] Figure 6 This is a schematic diagram of the internal structure of the U-shaped air bladder and the receiving groove in the pillow body of this utility model.

[0038] Figure 7 for Figure 6 Enlarged schematic diagram of section D in the middle.

[0039] Figure 8 This is a right-side view of the entire pillow body of this utility model.

[0040] Explanation of reference numerals in the attached diagram: 1. Pillow body; 2. U-shaped air bladder; 3. Receptive groove; 4. Micro-negative pressure moisture absorption chamber; 5. Deflator; 6. Inflation pump; 7. Negative pressure tank; 8. Limiting chamber; 9. Collection box; 10. Air extraction port; 11. Indicator light group; 12. Control button; 13. Pressure sensor; 14. Moisture-wicking and permeable layer; 15. Velcro; 16. Flexible branch hose; 17. Fixed negative pressure manifold; 18. Overflow pipe; 19. One-way permeation membrane; 20. Lower limb. Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0042] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, this embodiment provides a lower limb vascular elevation pillow with an active deformation support surface. The lower limb vascular elevation pillow includes a pillow body 1, a partitioned airbag assembly, a pressure acquisition assembly, and an airway control assembly. The partitioned airbag assembly is disposed inside the pillow body 1 and has a U-shaped contact end face on one side facing the pillow body 1. The pressure acquisition assembly is disposed on the pillow body 1 and the U-shaped contact end face. The airway control assembly is connected to the partitioned airbag assembly through a pipe and linearly adjusts the elevation height of the partitioned airbag assembly.

[0043] The partitioned airbag assembly includes a U-shaped airbag 2 and a heat-conducting layer disposed on the contact end face of the U-shaped airbag 2. The U-shaped airbags 2 are arranged along the width direction of the pillow body 1, and each U-shaped airbag 2 has a U-shaped arc structure surrounding the lower limb 20. The heat-conducting layer includes a moisture-wicking and permeating layer 14 and a micro-negative pressure moisture-absorbing cavity 4. The micro-negative pressure moisture-absorbing cavity 4 covers the upper surface of the U-shaped airbag 2 and is connected to the micro-negative pressure end of the airway control assembly, serving as an active suction channel for heat and moisture migration. The moisture-wicking and permeating layer 14 is laid above the micro-negative pressure moisture-absorbing cavity 4 and is in direct contact with the patient's skin, used to diffuse surface sweat and heat. In this embodiment, the moisture-wicking and permeating layer 14 is made of hydrophilic diffusion fibers.

[0044] The fibrous structure of the moisture-wicking and permeating layer 14 forms a multi-directional diffusion path, which can quickly spread local sweat to a larger area, thereby reducing the discomfort caused by prolonged local skin dampness. At the same time, the moisture-wicking and permeating layer 14 and the micro-negative pressure moisture-absorbing cavity 4 maintain an adhesion gap of 1 to 3 mm, so that diffused moisture can quickly enter the micro-negative pressure moisture-absorbing cavity 4 and form effective migration.

[0045] The diffused moisture in the moisture-permeable layer 14 is continuously drawn in by the micro-negative pressure end of the air path control component through the micro-negative pressure moisture absorption chamber 4, thereby forming an active moisture and heat migration path from top to bottom.

[0046] The pillow body 1 is preferably made of memory foam or medical sponge material in one piece, and has an internal accommodating groove 3 for housing the partitioned airbag components, so that each U-shaped airbag 2 can be embedded and installed to maintain stable force support. The outer surface of the pillow body 1 is covered with a medical-grade breathable outer fabric, which can be removed and washed using a zipper structure.

[0047] The air inlets of the U-shaped airbag 2 are connected to the air path control component, and are independently controlled and supplied with air based on the air path control component.

[0048] The micro-negative pressure moisture absorption chamber 4 is arranged on the outer surface of the U-shaped airbag 2 to cover the top contact area of ​​the U-shaped airbag 2. As the U-shaped airbag 2 is raised as a whole, it maintains a stable fit with the moisture-wicking and penetrating layer 14 and the patient's skin, ensuring that the efficiency of moisture and heat suction is not affected by the expansion and deformation of the airbag.

[0049] Optionally, the micro-negative pressure moisture-absorbing cavity 4 is a flexible, breathable cavity with internal supporting ribs to maintain stable cavity thickness and a continuous moisture and heat migration channel under negative pressure suction. The supporting ribs are made of a bend-resistant medical-grade elastic material to maintain cavity deformation stability and prevent collapse during suction. The micro-negative pressure moisture-absorbing cavity 4 is fixed to the upper surface of the U-shaped airbag 2 via circumferential heat pressing or Velcro 15 to ensure close contact and maintain moisture removal efficiency. Optionally, the moisture and heat conduction layer also includes a guide channel structure located below the moisture-permeable layer 14. This guide channel structure extends along the width of the pillow body 1 and directs the moisture migrated from the micro-negative pressure moisture-absorbing cavity 4 to the side exhaust area of ​​the pillow body 1, thus forming a continuous lateral moisture removal path.

[0050] The moisture-wicking channel structure consists of several parallel strip-shaped ribs or semi-enclosed grooves arranged along the width direction. These ribs or grooves are connected to the moisture-wicking interface of the micro-negative pressure moisture-absorbing chamber 4, allowing the extracted moisture to flow directionally within the channel and be transported along the width of the pillow body 1 to the outer moisture-wicking area. The moisture-wicking area may be equipped with moisture-wicking holes or breathable fabric, allowing moisture to be expelled from the pillow body through natural diffusion or negative pressure extraction.

[0051] The moisture-dispersing channel structure prevents moisture from accumulating locally and instead guides it quickly to areas away from the patient's skin, achieving a three-stage moisture and heat regulation path of diffusion, dispersion, and discharge. This significantly improves the efficiency of moisture and heat migration and keeps the moisture-dispersing and permeable layer 14 dry.

[0052] Optionally, in addition to providing positive or normal pressure adjustment to the partitioned airbag assembly, the airway control component also synchronously outputs pulsed or continuous low negative pressure to the micro-negative pressure moisture absorption chamber 4, so that the lower limb 20 lifting adjustment and the moist heat suction process can be linked and controlled through the same airway control component.

[0053] Specifically, the gas path control assembly also includes a negative pressure pump, a negative pressure tank 7, and a negative pressure pipeline, such as... Figure 3As shown, the negative pressure pipeline includes a fixed negative pressure manifold 17 and several flexible branch hoses 16. The fixed negative pressure manifold 17 is laid out along the width of the pillow body 1 and is fixedly installed in the middle structural layer or bottom support layer inside the pillow body 1. The fixed negative pressure manifold 17 is located in a reserved arrangement channel between the bottoms of two adjacent U-shaped airbags 2, and its position does not change during operation as the U-shaped airbags 2 inflate.

[0054] Each micro-negative pressure absorption chamber 4 has a negative pressure interface connected to one end of a fixed negative pressure manifold 17 via a flexible branch hose 16. The flexible branch hose 16 is laid along the outer wall or side edge of the U-shaped airbag 2 and is made of a flexible, bendable material. It is used to absorb the displacement generated when the U-shaped airbag 2 is raised, so that the micro-negative pressure absorption chamber 4 can maintain a stable negative pressure connection with the fixed negative pressure manifold 17 during the raising and lowering of the U-shaped airbag 2, without the need for synchronous movement or adjustment of the fixed negative pressure manifold 17. The other end of the fixed negative pressure manifold 17 is connected to a negative pressure tank 7. The negative pressure pump is installed in the negative pressure tank 7, and the air intake 10 of the negative pressure pump is connected to the negative pressure tank 7 to form a stable low negative pressure environment in the micro-negative pressure absorption chamber 4. The dehumidification interface of the micro-negative pressure absorption chamber 4 is also connected to the guide channel structure, so that when the negative pressure pump is working, it can form a directional negative pressure airflow extending in the width direction in the guide channel, driving the moisture to migrate to the dehumidification area.

[0055] like Figure 3 and Figure 5 As shown, a moisture collection box 9 is provided below the negative pressure tank 7. The collection box 9 is snapped into the limiting cavity 8 of the pillow body 1 and can be detached. The negative pressure tank 7 and the collection box 9 are connected by an overflow pipe 18. A one-way permeation membrane 19 is provided on the overflow pipe 18 so that the waste liquid or moisture in the negative pressure tank 7 can enter the collection box 9 without flowing back, thereby ensuring the safety and hygiene of the entire heat and moisture conduction system.

[0056] In addition, the micro-negative pressure moisture absorption chamber 4 is equipped with supporting ribs or a flexible support mesh to maintain its thickness and prevent it from collapsing under negative pressure suction conditions, ensuring that the moisture migration channel remains unobstructed. In this embodiment, the collection box 9 is detachably connected to the limiting cavity 8 provided in the pillow body 1 for regular cleaning and replacement, maintaining the hygienic performance of the heat and moisture conduction system.

[0057] In this embodiment, the combination of the heat and moisture conduction layer on the partitioned airbag assembly and the micro-negative pressure of the airway control assembly allows skin sweat and heat to form a continuous diffusion, conduction, and negative pressure extraction path, ensuring that the contact surface of the entire device remains dry during long-term use and reducing the risk of skin maceration or redness.

[0058] Optionally, the upper surface of the U-shaped airbag 2 of the partitioned airbag assembly is provided with a positioning structure, and the heat conduction layer is provided with a corresponding fixing fastener. The heat conduction layer is detachably installed on the positioning structure through the fixing fastener to facilitate cleaning, replacement and maintenance.

[0059] Furthermore, the positioning structure includes a slot, a preset embedding position, or Velcro 15 base fabric set at the edge of the upper surface of the U-shaped airbag, and the fixing fastener includes a barbed structure, a flexible insert, Velcro 15 face fabric, or a snap fastener; the heat conduction layer can be quickly fastened or disassembled with the positioning structure through the fixing fastener.

[0060] The positioning structure covers the entire upper surface periphery of the U-shaped airbag, ensuring the moisture-wicking layer remains flat and flush after installation without slippage or curling. The detachable arrangement of the moisture-wicking layer facilitates regular cleaning and replacement, and allows for the use of different materials for the moisture-wicking layer in different seasons or to meet varying care needs, thereby improving the equipment's flexibility and hygiene management.

[0061] In addition, the U-shaped airbag 2 is made of TPU or medical-grade composite film material through thermal molding, and its bottom support section and left and right covering sections are integrally formed; each U-shaped airbag 2 has an independent air inlet and exhaust port at the bottom, and is connected to the air circuit control component through a hose, thereby realizing independent lifting and lowering adjustment of each area.

[0062] Optionally, the partitioned airbag assembly is divided into at least three independent support zones along the length of the pillow body 1, corresponding to the ankle section, the middle section of the lower leg, and the upper section of the lower leg, respectively. The U-shaped airbag 2 in each support zone is connected to the airway control assembly through an independent inflation and deflation passage to achieve differentiated adjustment of the lifting height and coverage support for different lower limb 20 areas.

[0063] The three independent support zones cover the ankle area, the middle section of the calf muscle, and the popliteal fossa area, respectively. Each support zone is arranged between each other inside the pillow body 1 through a partition structure or a preset positioning groove to avoid the zone airbags shifting position or squeezing each other during inflation and deflation.

[0064] The U-shaped airbag 2, combined with the independent zone adjustment, allows each zone to automatically match the support deformation according to the patient's calf circumference and ankle width, ensuring that the entire device can adapt to different body types without the need to replace the pillow.

[0065] In this embodiment, the volume, coverage height, or material thickness of the U-shaped airbags 2 in each support zone can be adjusted according to the difference in softness of the corresponding lower limb 20 area, so that the ankle section uses a smaller volume, the middle section of the calf uses a conventional volume, and the upper section of the calf uses a larger volume, so as to form a progressive lifting curve that conforms to ergonomics.

[0066] like Figure 6 As shown, the U-shaped airbag 2 is set with different softness levels or materials in different areas to form a progressive lifting curve that conforms to ergonomics.

[0067] In this embodiment, the air path control component can independently adjust the air pressure of each support zone according to the detection results of the pressure acquisition component, so that the support height and covering pressure of the lower limb 20 at different positions can be adjusted in a closed loop, thereby avoiding the uneven stress on the legs caused by the traditional whole airbag lifting method.

[0068] Through the cooperation of the pillow body 1 and the partitioned airbag assembly, the overall lifting angle is formed by the combined deformation of multiple U-shaped airbags 2. Different slope curves can be achieved according to the patient's body shape and nursing needs, rather than the single fixed slope of the traditional wedge-shaped pad, ensuring that the entire device has a flexible and adjustable lifting curve.

[0069] Optionally, each U-shaped airbag 2 includes a bottom support section and left and right wrapping sections. The height of the left and right wrapping sections is greater than the height of the bottom support section. When inflated, the left and right wrapping sections form a wrapping support structure on both sides of the lower limb 20 to limit the lateral rolling of the lower limb 20 and increase overall stability.

[0070] The bottom support section has an arc or gently curved structure to conform to the natural curvature of the patient's lower leg, making the force distribution more even and reducing local pressure points. The left and right covering sections form an angle of 40° to 80° with respect to the bottom support section to ensure reliable conformity to the sides of the lower leg after inflation, thereby achieving a stable covering effect. At the same time, the inner surfaces of the left and right covering sections may be provided with anti-slip textures or flexible raised structures to increase the friction between them and the moisture-wicking and penetrating layer 14, so as to maintain overall stability even when the patient's lower limb 20 undergoes slight displacement.

[0071] In addition, the left and right covering sections are made of more elastic materials or have a double-layer film structure, which can generate buffer deformation when subjected to lateral pressure, thereby improving the patient's lateral comfort and reducing the pressure of the covering sections.

[0072] By combining the bottom support section with the left and right wrapping sections, the U-shaped airbag 2 can provide support in three directions, achieving stable support and efficient wrapping, thereby reducing the patient's tendency to roll laterally on the headrest, improving the stability of the lower limbs 20 and avoiding postural deviation from affecting venous return.

[0073] Optionally, the lower limb vascular elevation pillow further includes a pressure indicator component, the pressure acquisition component is electrically connected to the pressure indicator component, and the pressure indicator component is disposed on the side of the pillow body 1.

[0074] The pressure indicator component includes an indicator light group 11, which is used to visually present the real-time pressure of each support zone, enabling caregivers or users to intuitively judge the current support status.

[0075] Optionally, the pressure indicator component also includes a control button 12 located on the side of the pillow body 1. The control button 12 corresponds to different support zones of the U-shaped airbag 2 and is used to independently adjust the inflation volume or lifting height of each zone airbag, thereby meeting the support needs of different patients or different usage scenarios.

[0076] By combining the pressure acquisition component, pressure indication component, and air path control component, a semi-closed-loop control system can be formed that includes pressure sensing, pressure display, and manual adjustment, enabling users to make targeted adjustments to the U-shaped airbags 2 in different zones based on real-time pressure data.

[0077] Optionally, the pressure acquisition component includes multiple pressure sensing units arranged along the corresponding support area of ​​the U-shaped airbag 2. The pressure sensing units are located below the heat-conducting layer and fixed on the support base layer inside the pillow body 1. The pressure of the lower limb 20 on the moisture-conducting layer 14 can be transmitted to the pressure sensing units through the heat-conducting layer and the pressure distribution data is transmitted to the pressure indicator component.

[0078] The pressure acquisition component and the pressure indicator component work together to enable users to clearly understand the pressure distribution in different zones, thereby avoiding situations such as gastrocnemius muscle tenderness, popliteal fossa compression, or blood flow obstruction caused by excessive pressure on one side or at one point, and ensuring that the entire device has higher safety in use.

[0079] The pressure sensing units are respectively set in three independent support zones: the ankle segment, the mid-calf segment, and the upper calf segment, and collect local pressure values ​​of the lower limb 20 in these zones. The pressure sensing units can output instantaneous pressure values, pressure change trends, or pressure threshold signals, enabling the system to independently judge the support status of the ankle segment, the mid-calf segment, and the upper calf segment, thereby helping to assess whether the support of each zone is uniform.

[0080] In this embodiment, the pressure sensing unit is preferably a patch-type pressure sensor 13, which has a thin and flexible structure that can be attached to the supporting base layer below the heat and moisture conduction layer and adapt to the local arc deformation of the U-shaped airbag 2. The patch-type pressure sensor 13 can accurately collect the pressure values ​​acting on each support zone without affecting heat and moisture migration and airbag expansion, and has the advantages of fast response speed, high sensitivity and low cost, making it suitable for realizing the multi-zone pressure monitoring function of this utility model.

[0081] By cooperating with the pressure acquisition component and the air circuit control component, the system can monitor the pressure of each zone in real time and provide a target range for airbag adjustment, thereby ensuring that the entire device can be continuously maintained within a safe and comfortable support pressure range and achieving dynamic adaptive pressure adjustment.

[0082] Optionally, the air circuit control component includes an air pump 6, a pressure limiting valve, a check valve, a throttle orifice, and branch solenoid valves. The output of the air pump 6 passes sequentially through the pressure limiting valve and the check valve into the branch solenoid valves. Each branch solenoid valve corresponds to a different U-shaped airbag assembly. A throttle orifice is provided downstream of each branch port and connected to the corresponding U-shaped airbag 2 assembly, allowing fine adjustment of the gas flow rate and velocity entering the U-shaped airbag 2 assembly. The control button 12 is electrically connected to the drive circuit of the branch solenoid valves and the air pump 6, enabling independent adjustment of each zone when the user presses the control button 12 for any zone. This triggers the opening of the corresponding branch solenoid valve, simultaneously driving multiple air pumps to supply air to the U-shaped airbag 2 in that zone, thus achieving independent adjustment of each zone.

[0083] In addition, each U-shaped airbag assembly is also equipped with a corresponding deflation valve 5. When the user presses the corresponding decompression button, the deflation solenoid valve opens, allowing the gas in the U-shaped airbag 2 to be discharged through a one-way deflation passage, thereby reducing the lifting height of the support section.

[0084] In this embodiment, the pressure limiting valve is used to limit the maximum pressure output by the multi-channel air pump to avoid over-inflation of the airbag; the one-way valve is used to prevent gas backflow from causing mutual interference between the sections; and the throttling orifice is used to stabilize the gas input speed, making the airbag lifting process smoother and avoiding patient discomfort caused by instantaneous pressure fluctuations.

[0085] In addition, the flexible support structure of the pillow body 1 and the active deformation adjustment of the partitioned airbags work together to allow the support surface to be finely adjusted according to the user's posture changes, avoiding rigid pressure and providing comfort for long-term use, ensuring that the entire device has high adaptability and reliability in both clinical and home care.

[0086] In this embodiment, the air circuit control assembly is integrally disposed within a pre-set control cavity inside the pillow body 1, which is located in the side edge or bottom region of the pillow body 1. The air pump 6, pressure limiting valve, one-way valve, branch solenoid valve, and throttling orifice are all fixedly installed within the control cavity and are connected to each U-shaped airbag assembly or deflation valve 5 via air circuit pipes embedded inside the pillow body 1, thereby forming a closed, stable, and easily wired pneumatic control system within the pillow body.

[0087] Furthermore, each branch air passage pipe is laid along the length or width direction inside the pillow body 1, and passes through the internal partition structure to connect with the corresponding U-shaped airbag assembly, so that the inflation and deflation passages of the airbags are all arranged inside the pillow body, thereby avoiding exposed pipes from affecting user comfort and aesthetics.

[0088] The lower limb vascular elevation pillow also includes a microprocessor and a power supply device. The power supply device is used to supply power to the air pump 6, the branch solenoid valve, the venting and pressure relief valve 5, the pressure indicator component, the negative pressure pump, and the microprocessor body. The microprocessor is electrically connected to the pressure acquisition component, the pressure indicator component, the control button 12, the air pump 6, the branch solenoid valve, and the venting and pressure relief valve 5, respectively.

[0089] The power supply device converts mains power into a stable low-voltage operating voltage required by the aforementioned components, and provides branch power to the inflation pump 6, the negative pressure pump, and each solenoid valve to maintain the normal operation of each component. Simultaneously, the power supply device may include a backup battery, which provides short-term emergency power in the event of a power outage to ensure that the airbag does not collapse abnormally or malfunction.

[0090] The microprocessor receives real-time pressure data from the pressure acquisition component and, based on user adjustment commands or preset control logic from the pressure indication component, sends drive signals to the corresponding branch solenoid valves, inflation pump 6, and deflation valve 5, thereby controlling the inflation and deflation of the U-shaped airbags 2 in different support zones. The microprocessor can comprehensively analyze the instantaneous pressure values, pressure change trends, or pressure threshold signals output by the pressure sensing unit to determine whether each zone needs to be raised, depressurized, or maintained in its current state.

[0091] Furthermore, the microprocessor can also coordinate and control the start and stop time of the air pump 6, the opening duration of the branch solenoid valve, the exhaust rhythm of the venting and pressure relief valve 5, and the suction intensity of the negative pressure pump to achieve a semi-closed-loop or closed-loop control function of sensing, indicating, and adjusting, so that the entire lower limb 20-elevation pillow has higher stability and safety during use.

[0092] In this embodiment, a microprocessor control process is provided, the control process including the following steps:

[0093] S101 After receiving the working voltage output by the power supply device, the microprocessor enters the initialization state and sequentially performs communication self-tests and status confirmations on the pressure acquisition component, inflation pump 6, branch solenoid valve, deflation valve 5, negative pressure pump and pressure indicator component, and sets the initial state of each U-shaped airbag component to depressurization or low-pressure standby state.

[0094] S102. The microprocessor periodically reads the output signals of each pressure sensing unit in the pressure acquisition component, classifies and integrates the pressure values ​​of the three independent support zones corresponding to the ankle segment, the middle segment of the lower leg and the upper segment of the lower leg, and obtains the ankle segment pressure P1, the middle segment of the lower leg pressure P2 and the upper segment of the lower leg pressure P3 respectively.

[0095] The microprocessor can perform averaging, maximizing, or weighting of the outputs of multiple pressure sensing units in the same area as needed to obtain more stable partition pressure data.

[0096] S103. The microprocessor monitors in real time the button status of the control button 12 located on the side of the pillow body 1, including "raise / inflate" commands, "lower / deflate" commands, and mode switching commands (such as comfort mode, postoperative rehabilitation mode, etc.) for three points: ankle, middle of lower leg, and upper of lower leg.

[0097] When the microprocessor detects that the user has pressed the control button 12 of a certain partition, the microprocessor marks that partition as "to be adjusted".

[0098] S104. After the microprocessor reads the data from the pressure acquisition component, or when the user expresses an adjustment intention through the control button 12, the microprocessor marks a certain support zone (ankle segment / mid-calf segment / upper calf segment) as a working state that requires lifting or lowering actions. The microprocessor then calls the preset target pressure range or target lifting level. In this embodiment, the target pressure range for the ankle segment is set to [P1min, P1max], for the mid-calf segment to [P2min, P2max], and for the upper calf segment to [P3min, P3max].

[0099] When the pressure of the current zone is lower than the corresponding lower limit, it is considered that the support is insufficient, and the inflation of the U-shaped airbag 2 in that zone needs to be triggered.

[0100] When the current zone pressure is higher than the corresponding upper limit, it is considered that the support is too high, and the U-shaped airbag 2 of that zone needs to be deflated to reduce the pressure.

[0101] When the partition pressure is within the target range, maintain the current state and do not make any adjustments.

[0102] S105. When the microprocessor determines that a certain partition needs to be raised (e.g., P2 < P2min), and the user presses the "Raise / Inflate" button for that partition, the microprocessor outputs a control signal:

[0103] 1) Start the air pump 6;

[0104] 2) Open the branch solenoid valve corresponding to this zone;

[0105] 3) Keep the venting and pressure relief valve 5 in the closed position for this zone.

[0106] The airflow output from the multi-channel air pump passes through the pressure limiting valve and the one-way valve into the corresponding branch solenoid valve, and after being buffered by the throttle orifice, it enters the U-shaped airbag 2 of that zone to achieve a slow and smooth lifting.

[0107] During inflation, the microprocessor continuously monitors the pressure of the zone. When the pressure of the zone reaches or approaches the upper limit of the target range P2max, the microprocessor closes the solenoid valve of the zone and stops the multi-channel air pump or enters an intermittent operation state, thereby completing one lifting adjustment.

[0108] S106. When the microprocessor determines that a certain partition needs to have its lifting height reduced (e.g., P3 > P3max), and the user presses the "lower / deflate" button for that partition, the microprocessor outputs a control signal:

[0109] 1) Keep the air supply path of air pump 6 closed for this zone;

[0110] 2) Open the venting and pressure relief valve 5 of the corresponding zone to allow the gas inside the U-shaped airbag 2 of that zone to be slowly discharged through the one-way venting passage.

[0111] The microprocessor simultaneously monitors the pressure of the partition. When the partition pressure drops to near the lower limit of the target range or when the user releases the pressure relief button, it closes the venting and pressure relief valve 5 of the partition, thus completing the adjustment of the reduction in the lifting height of the partition.

[0112] S107. During the inflation and deflation process described above, the microprocessor converts the currently collected zone pressure data into a visual signal and displays it through the pressure indicator component. For example, the pressure status of the ankle, mid-calf, and upper calf is displayed by means of numerical values, bar graphs, or color changes of zone indicator lights, to help the user judge whether the current support is uniform and whether further adjustment is needed.

[0113] S108, the microprocessor also controls the negative pressure pump to start and stop intermittently according to the preset time cycle or the detected support state of the lower limb 20, so that the micro negative pressure moisture absorption chamber 4 and the guide channel structure maintain a low negative pressure suction state within the set working cycle, thereby continuously discharging the moisture diffused from the moisture-wicking permeation layer 14.

[0114] The microprocessor can delay the start of the negative pressure pump for a certain period of time after the airbag adjustment is completed, so as to avoid discomfort or airway interference to the patient caused by simultaneous inflation and aspiration.

[0115] S109. When the microprocessor detects that the pressure in any zone exceeds the safety threshold (e.g., significantly higher than Pmax), or detects that the air pump has been running for a long time but the pressure in that zone has not changed significantly, it can actively close the branch solenoid valve and the air pump 6 of that zone, and open the venting and pressure relief valve 5 to release pressure. At the same time, it will issue an abnormal prompt through the pressure indicator component to remind the user to check the status of the device.

[0116] S110: The microprocessor periodically repeats steps S102 to S109 to collect pressure, determine status, adjust zones and control heat and moisture suction for the three support zones (ankle, middle calf and upper calf), so that the lower limb vascular elevation pillow is always kept in a safe, comfortable working state that is conducive to venous return during use.

[0117] Those skilled in the art can write corresponding control programs based on the above control flow and store them in the microprocessor's registers, memory, or other computer-readable storage media, enabling the microprocessor to execute the above steps according to a preset program, thereby achieving logical control of the air pump 6, the branch solenoid valve, the venting and pressure relief valve 5, the negative pressure pump, and the pressure indicating component. Since program design and implementation are conventional techniques for those skilled in the art, the specific program code will not be described in detail in this embodiment.

[0118] In this embodiment, through the cooperation between the pillow body 1, the partitioned airbag assembly, the pressure acquisition assembly, the air path control assembly, and the pressure indicator assembly, the lower limb 20 support process can form a closed-loop control system of support structure, pressure detection, active adjustment, and feedback display, ensuring that the entire device has the advantages of uniform partitioned support, adjustable lifting height, dynamic controllable pressure, and significantly enhanced safety.

[0119] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the protection scope of the present utility model. Therefore, all equivalent technical changes made based on the contents of the present utility model specification and drawings are included within the protection scope of the present utility model. Furthermore, the elements therein can be updated as technology develops.

Claims

1. A lower limb vascular elevation pillow with an active deformation support surface, characterized in that, The lower limb vascular elevation pillow includes a pillow body, a partitioned airbag assembly, a pressure acquisition assembly, and an airway control assembly. The partitioned airbag assembly is disposed inside the pillow body and has a U-shaped contact end face on one side facing the pillow body. The pressure acquisition assembly is disposed on the pillow body and the U-shaped contact end face. The airway control assembly is connected to the partitioned airbag assembly through a pipe and linearly adjusts the elevation height of the partitioned airbag assembly. The partitioned airbag assembly includes U-shaped airbags and a heat-conducting layer disposed on the contact surface of the U-shaped airbags. The U-shaped airbags are arranged along the width of the pillow body, and each U-shaped airbag has a U-shaped arc structure that surrounds the lower limbs. The heat-conducting layer includes a moisture-wicking and permeating layer and a micro-negative pressure moisture-absorbing chamber. The micro-negative pressure moisture-absorbing chamber covers the upper surface of the U-shaped airbags and is connected to the micro-negative pressure end of the airway control assembly. The moisture-wicking and permeating layer is laid on top of the micro-negative pressure moisture-absorbing chamber and is in direct contact with the patient's skin. The diffused moisture in the moisture-permeable layer is continuously drawn in by the micro-negative pressure end of the air path control component through the micro-negative pressure moisture absorption chamber, thereby forming an active moisture and heat migration path from top to bottom.

2. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1, characterized in that, The partitioned airbag assembly is divided into at least three independent support zones along the length of the pillow body, corresponding to the ankle section, the middle section of the lower leg, and the upper section of the lower leg, respectively. The U-shaped airbag in each support zone is connected to the airway control assembly through an independent inflation and deflation passage.

3. The lower limb vascular elevation pillow with an active deformation support surface according to claim 2, characterized in that, Each U-shaped airbag includes a bottom support section and left and right wrapping sections. The height of the left and right wrapping sections is greater than the height of the bottom support section, and the left and right wrapping sections form a wrapping and supporting structure for both sides of the lower limbs when inflated.

4. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1, characterized in that, The micro-negative pressure moisture absorption chamber is a flexible and breathable chamber with supporting ribs inside, which are used to maintain the stability of the chamber thickness and maintain a continuous moisture and heat migration channel under negative pressure suction.

5. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1 or 4, characterized in that, The moisture-heat-conducting layer also includes a moisture-dissipating channel structure disposed below the moisture-dissipating and permeating layer. The moisture-dissipating channel structure extends along the width direction of the pillow body and guides the moisture migrated from the micro-negative pressure moisture absorption chamber to the side discharge area of ​​the pillow body.

6. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1, characterized in that, It also includes a pressure indicator component, the pressure acquisition component is electrically connected to the pressure indicator component, and the pressure indicator component is disposed on the side of the pillow body.

7. The lower limb vascular elevation pillow with an active deformation support surface according to claim 6, characterized in that, The pressure acquisition component includes multiple pressure sensing units arranged along the corresponding support area of ​​the U-shaped airbag. The pressure sensing units are located below the heat-conducting layer and fixed on the support base layer inside the pillow body. The lower limb pressure on the moisture-conducting layer can be transmitted to the pressure sensing units through the heat-conducting layer and the pressure distribution data is transmitted to the pressure indicator component.

8. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1, characterized in that, In addition to providing positive or normal pressure regulation to the partitioned airbag assembly, the air path control component also synchronously outputs pulsed or continuous low negative pressure to the micro-negative pressure moisture absorption chamber.

9. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1, characterized in that, The upper surface of the U-shaped airbag of the partitioned airbag assembly is provided with a positioning structure, and the heat conduction layer is provided with a corresponding fixing fastener. The heat conduction layer is detachably installed on the positioning structure through the fixing fastener.

10. The lower limb vascular elevation pillow with an active deformation support surface according to claim 1 or 8, characterized in that, The air circuit control component includes an inflation pump, a pressure relief valve, a check valve, a throttle orifice, and branch solenoid valves. The output of the inflation pump passes through the pressure relief valve and the check valve in sequence before entering the branch solenoid valves. Each branch solenoid valve corresponds to a different U-shaped airbag assembly. A throttle orifice is provided downstream of each branch port and connected to the corresponding U-shaped airbag assembly, and the gas flow rate and velocity entering the U-shaped airbag assembly are finely adjusted.

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