A heat preservation device for hemodialysis patients

Abstract

This utility model relates to the field of medical devices, specifically to a warming device for hemodialysis patients. It includes a central support frame with guide rails rotatably connected to both ends. An adjustable support frame is slidably connected to the guide rails. The adjustable support frame has a movable block slidably connected to the guide rails. Rotating bases are provided on the opposing surfaces of the adjustable support frame and the central support frame. A first rotating rod is rotatably connected to the rotating base on the central support frame, and a second rotating rod is rotatably connected to the rotating base on the adjustable support frame. The first and second rotating rods are rotatably connected at their closest points. A warming blanket is placed between the central support frame and the adjustable support frame. When the adjustable support frame moves away from the central support frame until the first and second rotating rods are taut, the first and second rotating rods provide support for the warming blanket placed between the central support frame and the adjustable support frame. This application improves the convenience of the warming device.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a warming device for hemodialysis patients. Background Technology

[0002] Hemodialysis is a renal replacement therapy for patients with acute and chronic renal failure. It involves draining blood from the body and exchanging substances with dialysate in a dialyzer to remove metabolic waste, maintain electrolyte and acid-base balance, and remove excess water. The purified blood is then returned to the body. Currently, hemodialysis patients face some challenges in maintaining body temperature during treatment. Firstly, the blood temperature drops before returning to the vein after dialysis, causing discomfort and potentially leading to life-threatening complications such as hypothermia. Secondly, existing temperature control measures have limitations. For example, some devices cannot safely and efficiently heat the dialysate or blood, nor can they dynamically adjust the temperature to maintain a stable level. Furthermore, some devices are not foldable, taking up considerable space and lacking convenience.

[0003] Therefore, this invention provides a warming device for hemodialysis patients to solve the above problems. Utility Model Content

[0004] To address the aforementioned issues, a warming device for hemodialysis patients is provided. A sliding adjustment support frame via a guide rail unfolds two sets of rotating rods, forming a rigid triangular support. When unfolded, the first and second rotating rods taut, forming an arched frame that supports the warming blanket, creating a three-dimensional warming space that maintains the temperature of the treatment area while preventing pressure on the patient. For storage, the rotating rods slide in the opposite direction to fold back to their original position, achieving a compact and portable device. This structure, through a linkage mechanism, adaptively adjusts the angle, solving the problem of some warming devices being non-foldable, space-consuming, and inconvenient.

[0005] To address the problems of existing technologies, this utility model provides a warming device for hemodialysis patients, comprising a central support frame, guide rails rotatably connected to both ends of the central support frame, an adjustable support frame slidably connected to the guide rails, a movable block slidably connected to the adjustable support frame, a rotating base on the opposite surfaces of the adjustable support frame and the central support frame, a first rotating rod rotatably connected to the rotating base on the central support frame, and a second rotating rod rotatably connected to the rotating base on the adjustable support frame, with the first and second rotating rods rotatably connected at their closest ends, and a warming blanket covering the central support frame and the adjustable support frame; when the adjustable support frame moves away from the central support frame until the first and second rotating rods are taut, the first and second rotating rods provide support for the warming blanket covering the central support frame and the adjustable support frame.

[0006] Preferably, the guide rail has a through hole at a position away from the central support frame, and the moving block has a positioning slot that matches the through hole. When the first rotating rod and the second rotating rod are taut, the through hole and the positioning slot are in an overlapping state, and the support frame is fixed and adjusted by a pin.

[0007] Preferably, the first rotating rod has a receiving groove for accommodating the second rotating rod, and when the adjusting support frame abuts against the central support frame, the second rotating rod is located in the receiving groove.

[0008] Preferably, the bottom of the central support frame is rotatably connected to the guide rail, so that when the adjusting support frame abuts against the central support frame, the guide rail can rotate toward the central support frame.

[0009] Preferably, the central support frame has a first rotating block on both sides of its bottom, and the guide rail has a second rotating block at one end near the central support frame. A connecting block is fitted on the first and second rotating blocks, and a through groove adapted to the first and second rotating blocks is opened on the connecting block. The first and second rotating blocks are inserted into the through groove.

[0010] Preferably, the contact point between the central support frame and the guide rail is chamfered.

[0011] Preferably, the end of the guide rail away from the central support frame is provided with an anti-detachment block to prevent the adjustment support frame from moving excessively.

[0012] Preferably, the cross-sections of the central support frame and the adjusting support frame are semi-circular.

[0013] The advantages of this utility model compared to the prior art are:

[0014] 1. In this utility model, by adjusting the sliding linkage design between the support frame and the central support frame, the first rotating rod and the second rotating rod form a triangular rigid support structure in the taut state, providing three-dimensional support for the thermal blanket. At the same time, by the second rotating rod embedding into the receiving groove of the first rotating rod when the rotating rod is folded, compact storage is achieved, which not only ensures the support stability when unfolded, but also reduces the volume of the device after folding, solving the problem of large space occupation of traditional devices.

[0015] 2. In this utility model, the guide rail through hole and the moving block positioning slot are locked together by a pin, combined with the end anti-detachment block for rigid limiting, to achieve millimeter-level precise positioning when unfolded, avoiding the risk of support frame retraction or derailment, and the chamfered contact surface reduces local stress by 80%, ensuring structural reliability when repeatedly folded and unfolded.

[0016] 3. Based on the semi-circular cross-section support frame and composite hinge structure, the bidirectional rotational freedom of the central support frame and guide rail is synchronously constrained by the connecting block through groove. Combined with the arc load distribution design, the bending strength is improved, and the stress concentration phenomenon at the folding corner is eliminated, significantly extending the service life of the device to more than 3 times that of the traditional structure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the insulation blanket of a hemodialysis patient insulation device according to this utility model.

[0018] Figure 2 This is a three-dimensional schematic diagram of the heating blanket of the hemodialysis patient heating device of this utility model when it is not laid out.

[0019] Figure 3 This is a three-dimensional schematic diagram of the first and second rotating rods of a hemodialysis patient warming device according to this utility model.

[0020] Figure 4 This is a three-dimensional schematic diagram of an adjustable support frame for a hemodialysis patient warming device according to this utility model.

[0021] Figure 5 This is a schematic diagram showing the disassembled adjustment support frame and guide rail of a hemodialysis patient warming device according to this utility model.

[0022] Figure 6 This is a three-dimensional schematic diagram of the adjustable support frame of the hemodialysis patient warming device of this utility model when it is stored.

[0023] The following are the labels in the diagram: 1. Central support frame; 2. Guide rail; 3. Adjustable support frame; 4. Moving block; 5. Rotating base; 6. First rotating rod; 7. Second rotating rod; 8. Positioning slot; 9. Receiving slot; 10. First rotating block; 11. Second rotating block; 12. Connecting block; 13. Anti-detachment block. Detailed Implementation

[0024] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figures 1-6As shown: A warming device for hemodialysis patients includes a central support frame 1, with guide rails 2 rotatably connected to both ends of the central support frame 1. An adjustable support frame 3 is slidably connected to the guide rails 2. The adjustable support frame 3 is provided with a movable block 4 slidably connected to the guide rails 2. A rotating base 5 is provided on the opposite surface of the adjustable support frame 3 and the central support frame 1. A first rotating rod 6 is rotatably connected to the rotating base 5 on the central support frame 1, and a second rotating rod 7 is rotatably connected to the rotating base 5 on the adjustable support frame 3. The first rotating rod 6 and the second rotating rod 7 are rotatably connected at their closest ends. A warming blanket is provided between the central support frame 1 and the adjustable support frame 3. When the adjustable support frame 3 moves away from the central support frame 1 until the first rotating rod 6 and the second rotating rod 7 are taut, the first rotating rod 6 and the second rotating rod 7 provide support for the warming blanket provided between the central support frame 1 and the adjustable support frame 3.

[0026] In existing technologies, heat preservation devices occupy a large space, making them inconvenient to carry and move. To solve this problem, in this application, when a heat preservation environment is needed for hemodialysis patients, the operator can slide the adjustable support frame 3 outward along the guide rail 2, causing the moving block 4 to gradually move away from the central support frame 1. During this process, the movement of the adjustable support frame 3 drives the second rotating rod 7 to move synchronously through the rotating base 5, and the first rotating rod 6 and the second rotating rod 7 are linked by a rotational connection.

[0027] As the adjusting support frame 3 continues to move outward, the angle between the first rotating rod 6 and the second rotating rod 7 gradually increases. When it moves to the set position, the first rotating rod 6 and the second rotating rod 7 are fully taut, forming a rigid support structure. The triangular support frame formed by the two sets of rotating rods provides three-dimensional support for the thermal quilt covering it, preventing the quilt from collapsing and affecting the insulation effect.

[0028] During operation, the relative position between the central support frame 1 and the adjusting support frame 3 can be flexibly adjusted via the sliding of the guide rail 2. The design of the rotating base 5 allows the support rods to adapt to changes in angle during the adjustment process. The unfolded support structure forms a stable arched space, ensuring that the warm blanket maintains an appropriate distance from the patient's body to avoid pressure, while also maintaining the temperature of the treatment area through the thermal insulation properties of the blanket material. When the treatment is finished and the device needs to be stored, the rotating rods can be folded back to their original position by sliding the adjusting support frame 3 in the reverse direction, achieving compact storage of the device.

[0029] Reference Figures 1-4 As shown: The guide rail 2 has a through hole at a position away from the central support frame 1. The moving block 4 has a positioning slot 8 that matches the through hole. When the first rotating rod 6 and the second rotating rod 7 are straightened, the through hole and the positioning slot 8 are in an overlapping state. At this time, the support frame 3 is fixed and adjusted by a pin.

[0030] As the adjusting support frame 3 slides outward along the guide rail 2, the moving block 4 moves synchronously, causing the first rotating rod 6 and the second rotating rod 7 to gradually unfold. During this process, the pre-set through hole on the guide rail 2 and the positioning slot 8 on the surface of the moving block 4 are misaligned, allowing the support frame to freely slide and adjust the coverage area.

[0031] When the adjusting support frame 3 moves to its limit position, the first rotating rod 6 and the second rotating rod 7 are fully taut, forming a stable support structure. At this time, the through hole on the guide rail 2 coincides with the positioning slot 8 of the moving block 4 in space, forming a through locking channel.

[0032] Medical staff insert the pin into the overlapping through hole and positioning slot 8, using the physical blocking effect of the pin to limit the sliding freedom of the moving block 4 on the track.

[0033] Reference Figure 2 and Figure 6 As shown: The first rotating rod 6 has a receiving groove 9 for accommodating the second rotating rod 7. When the adjusting support frame 3 abuts against the central support frame 1, the second rotating rod 7 is located in the receiving groove 9.

[0034] When the adjusting support frame 3 slides towards the central support frame 1 until it is fully in contact, the connecting end of the first rotating rod 6 and the second rotating rod 7 begins to fold due to the change in the angle of the rotating base 5. At this time, the second rotating rod 7 gradually disengages from the unfolded state as the adjusting support frame 3 moves, and the rod body of the second rotating rod 7 rotates along the rotation axis of the first rotating rod 6 and is embedded in the preset receiving groove 9.

[0035] Reference Figures 1-6 As shown: The bottom of the central support frame 1 is rotatably connected to the guide rail 2. When the adjusting support frame 3 abuts against the central support frame 1, the guide rail 2 can rotate toward the central support frame 1.

[0036] When the adjusting support frame 3 slides to fully contact the central support frame 1, the rigid constraint of the rotation connection point between the bottom of the central support frame 1 and the guide rail 2 in the unfolded state is released. At this time, the guide rail 2 can rotate around the connection point toward the central support frame 1.

[0037] Reference Figures 2-6 As shown: The bottom of the central support frame 1 is provided with first rotating blocks 10 on both sides, and the guide rail 2 is provided with a second rotating block 11 at one end near the central support frame 1. The first rotating block 10 and the second rotating block 11 are fitted with connecting blocks 12. The connecting blocks 12 are provided with through slots that are adapted to the first rotating block 10 and the second rotating block 11. The first rotating block 10 and the second rotating block 11 are inserted into the through slots.

[0038] The first rotating block 10 at the bottom of the central support frame 1 and the second rotating block 11 at the end of the guide rail 2 are respectively inserted into the through slot of the connecting block 12 to form a bidirectional rotating composite hinge. The width of the through slot matches the cross-sectional dimensions of the rotating blocks, allowing both to rotate around their own axes within the slot while limiting lateral offset.

[0039] Reference Figure 2 and Figure 3 As shown: the contact point between the central support frame 1 and the guide rail 2 is chamfered.

[0040] At the contact point between the central support frame 1 and the guide rail 2, a chamfered bevel or rounded transition replaces the original right-angled edge, transforming the contact from line or point to surface. This design significantly reduces local pressure and avoids material fatigue or deformation caused by stress concentration during frequent folding and unfolding.

[0041] Reference Figure 2 As shown: The guide rail 2 is provided with an anti-detachment block 13 at the end away from the central support frame 1 to prevent the adjustment support frame 3 from moving excessively.

[0042] As the adjusting support frame 3 slides outward along the guide rail 2 to expand the insulation area, the moving block 4 moves synchronously with it. The anti-detachment block 13 is fixed to the end of the guide rail 2, and its height and width are both greater than the rail cross-section, forming a raised mechanical baffle structure.

[0043] Reference Figures 1-6 As shown: the cross-sections of the central support frame 1 and the adjusting support frame 3 are semi-circular.

[0044] The semi-circular cross-sections of the central support frame 1 and the adjusting support frame 3 allow them to evenly distribute the vertical load to the curved outer surface when bearing the pressure of the warm blanket and the patient's limbs, avoiding the stress concentration phenomenon of traditional rectangular cross-sections. The continuous curved surface of the semi-circle has a higher resistance to bending moment, significantly reducing the risk of plastic deformation of the support frame due to repeated unfolding or compression.

[0045] Working principle: The core of the device consists of a central support frame 1 and two sliding adjustable support frames 3 on both sides. The relative positions of the two are linearly adjusted via guide rails 2. When the insulated space needs to be expanded, the operator pushes the adjustable support frame 3 outward. At this time, the moving block 4 slides along the guide rails 2, causing the second rotating rod 7 to expand relative to the first rotating rod 6 on the central support frame 1. The two rotating rods form a linkage mechanism through the rotating connection. As the adjustable support frame 3 moves, the angle between the two rods gradually increases, eventually straightening to form a rigid triangular support structure, providing three-dimensional support for the insulation blanket covering it.

[0046] The locking function of the device is achieved through the engagement of the track through-hole and the positioning slot 8. When the support frame 3 is moved to its limit position, the through-hole on the track aligns with the slot of the moving block 4, and inserting the pin restricts the sliding freedom of the moving block 4. This mechanical locking method ensures the stability of the support structure in the deployed state and prevents the support frame from accidentally retracting due to external forces. The physical blocking effect of the pin provides intuitive operational feedback to medical personnel, enhancing the safety of the device.

[0047] During storage, the adjustable support frame 3 slides towards the central support frame 1, and the second rotating rod 7 gradually disengages from its unfolded state through rotation. At this time, the receiving groove 9 on the first rotating rod 6 plays a crucial role. After the rod body of the second rotating rod 7 rotates along the rotation axis, it embeds into the receiving groove 9, effectively reducing the space occupied after folding. This nested storage design allows the device to maintain a compact shape when not in use, making it easy to carry and store.

[0048] The rotational connection between the central support frame 1 and the guide rail 2 is achieved using a composite hinge structure. The through-slot on the connecting block 12 simultaneously accommodates the first rotating block 10 of the central support frame 1 and the second rotating block 11 of the rail, forming a two-way rotational degree of freedom. When the device is fully folded, the rail can rotate around the hinge towards the central support frame 1, further compressing the overall size. The through-slot design inside the connecting block 12 ensures rotational freedom while limiting lateral displacement through dimensional matching, maintaining the structural integrity.

[0049] To improve the durability of the device, the contact area between the central support frame 1 and the guide rail 2 is chamfered. The rounded contact surface transforms the original line contact into a surface contact, significantly reducing local stress concentration. This structural optimization effectively alleviates material fatigue during repeated folding and unfolding, extending the service life of critical connection parts.

[0050] The anti-detachment block 13, as a safety protection component, is fixed to the end of the guide rail 2. Its protruding structure forms a mechanical baffle, preventing excessive displacement of the moving block 4 when the adjusting support frame 3 slides outward. This design not only prevents structural failure caused by the support frame accidentally detaching from the rail, but also provides the operator with a clear indication of the movement endpoint through rigid limiting.

[0051] The curved outer surface evenly distributes the pressure on the patient's limbs in the vertical direction, avoiding stress concentration at the corners of traditional rectangular cross-sections. The continuous curved surface structure has better resistance to bending moments, making the support frame less prone to plastic deformation when bearing the weight of the thermal blanket and external pressure, ensuring structural stability over long-term use.

[0052] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A warming device for hemodialysis patients, characterized in that, Includes a central support frame (1), with guide rails (2) rotatably connected to both ends of the central support frame (1), and an adjustable support frame (3) slidably connected to the guide rails (2). The adjustable support frame (3) is provided with a moving block (4) slidably connected to the guide rails (2). A rotating base (5) is provided on the opposite surface of the adjustable support frame (3) and the central support frame (1). A first rotating rod (6) is rotatably connected to the rotating base (5) on the central support frame (1), and a second rotating rod (7) is rotatably connected to the rotating base (5) on the adjustable support frame (3). The first rotating rod (6) and the second rotating rod (7) are rotatably connected at one end close to each other. A thermal blanket is provided between the central support frame (1) and the adjustable support frame (3). When the adjusting support frame (3) moves away from the central support frame (1) until the first rotating rod (6) and the second rotating rod (7) are taut, the first rotating rod (6) and the second rotating rod (7) provide support for the insulation blanket placed between the central support frame (1) and the adjusting support frame (3).

2. The hemodialysis patient warming device according to claim 1, characterized in that, The guide rail (2) has a through hole at a position away from the central support frame (1), and the moving block (4) has a positioning slot (8) that matches the through hole. When the first rotating rod (6) and the second rotating rod (7) are straightened, the through hole and the positioning slot (8) are in an overlapping state. At this time, the support frame (3) is fixed and adjusted by a pin.

3. The hemodialysis patient warming device according to claim 1, characterized in that, The first rotating rod (6) has a receiving groove (9) for accommodating the second rotating rod (7). When the adjusting support frame (3) abuts against the central support frame (1), the second rotating rod (7) is located in the receiving groove (9).

4. The hemodialysis patient warming device according to claim 1, characterized in that, The bottom of the central support frame (1) is rotatably connected to the guide rail (2). When the adjusting support frame (3) abuts against the central support frame (1), the guide rail (2) can rotate toward the central support frame (1).

5. A warming device for hemodialysis patients according to claim 4, characterized in that, The central support frame (1) has first rotating blocks (10) on both sides of its bottom. The guide rail (2) has a second rotating block (11) at one end near the central support frame (1). A connecting block (12) is fitted on the first rotating block (10) and the second rotating block (11). The connecting block (12) has a through groove that is adapted to the first rotating block (10) and the second rotating block (11). The first rotating block (10) and the second rotating block (11) are inserted into the through groove.

6. A warming device for hemodialysis patients according to claim 5, characterized in that, The contact point between the central support frame (1) and the guide rail (2) is chamfered.

7. A warming device for hemodialysis patients according to claim 1, characterized in that, The guide rail (2) is provided with an anti-detachment block (13) at one end away from the central support frame (1) to prevent the adjustment support frame (3) from moving excessively.

8. A warming device for hemodialysis patients according to claim 1, characterized in that, The cross-sections of the central support frame (1) and the adjusting support frame (3) are semi-circular.

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