A pulley lifting mechanism for a hospital bed

Abstract

The utility model discloses a pulley lifting mechanism for sickbed, chassis, lifting unit, lifting unit includes setting first drive source at one end of chassis and setting turnover subassembly at the other end of chassis, first drive source top and turnover subassembly top swing joint has same mounting bracket, and mounting bracket is parallel with chassis under initial state, and mounting bracket is used for installing bed board, and first drive source and turnover subassembly cooperation are used for controlling mounting bracket to lean along its length direction, and turnover subassembly is used for controlling mounting bracket to roll over along its width direction, the mounting bracket is controlled to lean along the length direction (such as the bed head is lifted) through first drive source and turnover subassembly cooperation, and this kind of adjustment can disperse the sustained pressure of back and hip, avoid the blood circulation of local tissue long -term pressure leading to, roll over or carry out rehabilitation activity, improve the blood circulation state of upper body, and the mounting bracket rolls over along the width direction (left and right rolls over) through turnover subassembly drive, and the contact part of patient's body and bed surface can be changed regularly.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a pulley lifting mechanism for a hospital bed. Background Technology

[0002] Medical beds are an essential component of hospital wards and are necessary equipment for patients during hospitalization.

[0003] Patients who are bedridden for extended periods often experience limited limb mobility, leading to prolonged pressure on bony prominences such as the sacrum, coccyx, scapula, and heels. This can cause impaired local blood circulation, resulting in ischemia and necrosis of the skin and subcutaneous tissues, ultimately forming pressure ulcers. Pressure ulcers not only increase patient suffering but can also lead to complications such as infection, severely impacting the recovery process.

[0004] Existing medical beds generally suffer from limited functionality, with most only capable of simple overall height adjustment or partial angle adjustment at the head or foot of the bed, unable to perform overall turning movements in the forward / backward or left / right directions. This makes it difficult for patients to relieve local pressure through changes in position, requiring frequent manual turning by nursing staff, which increases the workload of nursing staff and is prone to causing patient discomfort or secondary injury due to improper operation. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pulley lifting mechanism for a hospital bed, so as to solve the problem that the existing hospital bed has a single function and that patients who lie flat for a long time are prone to obstruction of local blood circulation.

[0006] According to an embodiment of the present invention, a bed-mounted pulley lifting mechanism includes a base frame and a lifting unit. The lifting unit includes a first drive source disposed at one end of the base frame and a flipping component disposed at the other end of the base frame. The top of the first drive source and the top of the flipping component are movably connected to the same mounting frame. In the initial state, the mounting frame is parallel to the base frame and is used to mount the bed board. The first drive source and the flipping component cooperate to control the mounting frame to tilt along its length direction, and the flipping component is used to control the mounting frame to flip sideways along its width direction.

[0007] Compared to existing technologies, this invention offers the following advantages: By cooperating with the first drive source and the tilting component, the mounting frame can be tilted along its length (e.g., raising the head of the bed or lowering the foot of the bed). This adjustment disperses continuous pressure on the back and buttocks, preventing poor blood circulation caused by prolonged pressure on local tissues. It also facilitates eating, turning over, or performing rehabilitation activities, improving blood circulation in the upper body. The tilting component drives the mounting frame to tilt laterally (left and right), periodically changing the contact points between the patient's body and the bed surface. By tilting at a small angle, the patient's left and right buttocks and shoulder blades alternately bear pressure, reducing the risk of ischemia caused by prolonged pressure on the same area, lowering the probability of pressure sores, and proactively helping the patient change position and distribute pressure, fundamentally alleviating the problem of impaired local blood circulation caused by prolonged bed rest.

[0008] Preferably, a first connecting frame is provided at one end of the mounting frame, a second connecting frame is hinged to the first connecting frame, and the first drive source is movably connected to the second connecting frame.

[0009] Preferably, a first mounting base is provided on the top of the first drive source, and a first pulley group is mirror-hung on both sides of the first mounting base. A first slide rail is mirror-provided inside the second connecting frame, and each first pulley group is located in the corresponding first slide rail.

[0010] Preferably, the axis of the hinge point of the first connecting frame and the second connecting frame is perpendicular to the axis of the hinge point of the first mounting base and the first pulley group.

[0011] Preferably, the flipping assembly includes a second drive source and a third drive source disposed on the base frame at the end away from the first drive source, and a linkage frame movably connected to the second drive source and the third drive source. The linkage frame has connecting blocks mirror-hinged at both ends, and the two connecting blocks are respectively fixedly connected to the mounting frame.

[0012] Preferably, the linkage frame includes a first frame and a second frame, which are fixedly connected.

[0013] Preferably, a third mounting base is provided on the top of the third drive source, and a second pulley group is mirror-hung on the third mounting base. A second slide rail is mirror-hung inside the first frame, and each second pulley group is respectively installed in the corresponding second slide rail.

[0014] Preferably, a second mounting base is provided on the top of the second drive source, and the second mounting base is hinged to the second frame.

[0015] Preferably, the axis of the hinge point between the second mounting base and the second frame is parallel to the axis of the hinge point between the third mounting base and the second pulley block.

[0016] Preferably, the first drive source, the second drive source, and the third drive source are all lifting motors. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the first driving source in an embodiment of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the flipping component in an embodiment of this utility model.

[0020] The reference numerals in the accompanying drawings include: 10, base frame; 20, mounting frame; 201, connecting block; 30, first drive source; 31, first connecting frame; 32, second connecting frame; 321, first slide rail; 33, first mounting base; 331, first pulley block; 40, second drive source; 41, second mounting base; 50, third drive source; 51, second pulley block; 52, third mounting base; 60, linkage frame; 61, first frame; 611, second slide rail; 62, second frame. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 3 As shown in the figure, this utility model embodiment proposes a bed pulley lifting mechanism, which includes a base frame 10 and a lifting unit. The lifting unit includes a first drive source 30 disposed at one end of the base frame 10 and a flipping component disposed at the other end of the base frame 10. The top of the first drive source 30 and the top of the flipping component are movably connected to the same mounting frame 20. The mounting frame 20 is parallel to the base frame 10 in the initial state. The mounting frame 20 is used to mount the bed board. The first drive source 30 and the flipping component cooperate to control the mounting frame 20 to tilt along its length direction. The flipping component is used to control the mounting frame 20 to flip sideways along its width direction.

[0023] The detailed working process of this embodiment is as follows: The first drive source 30, in conjunction with the flipping component, controls the mounting frame 20 to tilt along its length (e.g., raise the head of the bed or lower the foot of the bed). This adjustment can disperse the continuous pressure on the back and buttocks, avoiding poor blood circulation caused by long-term pressure on local tissues. It also facilitates the patient's eating, turning over, or performing rehabilitation activities, improving blood circulation in the upper body. The flipping component drives the mounting frame 20 to tilt laterally (left and right) along its width, periodically changing the contact area between the patient's body and the bed surface. By tilting at a small angle, the patient's left and right buttocks and shoulder blades alternately bear pressure, reducing the risk of ischemia caused by long-term pressure on the same area, lowering the probability of pressure sores (bedsores), and actively helping the patient change position and distribute pressure.

[0024] like Figure 2As shown, a first connecting frame 31 is provided at one end of the mounting bracket 20, and a second connecting frame 32 is hinged on the first connecting frame 31. The first drive source 30 is movably connected to the second connecting frame 32.

[0025] like Figure 2 As shown, a first mounting base 33 is provided on the top of the first drive source 30, and a first pulley group 331 is mirror-hung on both sides of the first mounting base 33. A first slide rail 321 is mirror-arranged inside the second connecting frame 32, and each first pulley group 331 is located in the corresponding first slide rail 321.

[0026] like Figure 2 As shown, the axis of the hinge point of the first connecting frame 31 and the second connecting frame 32 is perpendicular to the axis of the hinge point of the first mounting base 33 and the first pulley group 331.

[0027] The detailed working process of this embodiment is as follows: the hinge between the first connecting frame 31 and the second connecting frame 32 provides a rotation reference for the tilting of the mounting frame 20 along the length direction (such as raising the head or foot of the bed); the hinge between the first mounting base 33 and the first pulley group 331 adapts to the adaptive adjustment of the angle when the first drive source 30 extends and retracts.

[0028] The axes of the two sets of hinge points are perpendicular to each other (e.g., one set along the length of the mounting bracket 20 and the other along the width), ensuring that the movement trajectories of each component do not interfere when the mounting bracket 20 tilts in the length direction (first dimension) and flips in the width direction (second dimension).

[0029] The first pulley assembly 331 slides within the first slide rail 321 of the second connecting frame 32, converting the telescopic power of the first drive source 30 (such as the linear motion of the push rod) into the rotation or angle adjustment of the second connecting frame 32. At the same time, by replacing sliding friction with the rolling of the pulleys, the resistance to movement is significantly reduced, making the adjustment process smoother (reducing the feeling of being stuck) and avoiding discomfort to the patient due to the bumps during adjustment.

[0030] The combination of pulleys and rails can also distribute the force: when the patient's weight is transferred to the connecting frame through the mounting frame 20, the rails can distribute the load along the length direction, while the pulley group reduces local stress through rolling contact, reduces component wear, extends the service life of the device, and ensures the stability of long-term use.

[0031] like Figure 3 As shown, the flipping assembly includes a second drive source 40 and a third drive source 50 disposed on the base frame 10 at one end away from the first drive source 30, and a linkage frame 60 movably connected to the second drive source 40 and the third drive source 50. The linkage frame 60 has connecting blocks 201 mirror-hinged at both ends, and the two connecting blocks 201 are fixedly connected to the mounting frame 20 respectively.

[0032] like Figure 3As shown, the linkage frame 60 includes a first frame 61 and a second frame 62, which are fixedly connected.

[0033] like Figure 3 As shown, a third mounting base 52 is provided on the top of the third drive source 50, and a second pulley group 51 is mirror-hung on the third mounting base 52. A second slide rail 611 is mirror-hung inside the first frame 61, and each second pulley group 51 is respectively set in the corresponding second slide rail 611.

[0034] like Figure 1 As shown, a second mounting base 41 is provided on the top of the second drive source 40, and the second mounting base 41 is hinged to the second frame 62.

[0035] like Figure 3 As shown, the axis of the hinge point between the second mounting base 41 and the second frame 62 is parallel to the axis of the hinge point between the third mounting base 52 and the second pulley block 51.

[0036] The detailed working process of this embodiment is as follows: the second drive source 40 and the third drive source 50 cooperate to jointly drive the linkage frame 60 to move:

[0037] The third drive source 50 slides within the second slide rail 611 of the first frame 61 via the second pulley group 51 of the third mounting base 52, converting the telescopic power into the translation or angular deflection of the linkage frame 60 along the slide rail direction; the second drive source 40 provides a rotation fulcrum for the linkage frame 60 through the hinge between the second mounting base 41 and the second frame 62, guiding it to tilt around the axis in the width direction.

[0038] The second pulley group 51 rolls within the second slide rail 611, converting sliding friction into rolling friction, which greatly reduces motion resistance, making the rollover process slow and smooth, and avoiding discomfort to the patient due to bumps.

[0039] The hinge axis of the second mounting base 41 and the second frame 62 is parallel to the hinge axis of the third mounting base 52 and the second pulley block 51 (both along the width direction of the mounting frame 20), ensuring that the power of the dual drive sources is transmitted in the same plane and that the motion trajectory is free from interference.

[0040] The linkage frame 60 is a rigid, integral structure formed by the fixed connection of the first frame 61 and the second frame 62, exhibiting high rigidity and good resistance to deformation. When the patient's weight is transferred to the connecting block 201 through the mounting frame 20, the linkage frame 60 can evenly distribute the load to the dual drive sources, avoiding component damage caused by excessive force at a single point. At the same time, the fixed connection of the first frame 61 and the second frame 62 ensures lossless power transmission from the drive source to the mounting frame 20, maintaining stability of the side-turning movement even when the patient's center of gravity shifts during rollover, thus reducing safety hazards.

[0041] like Figure 1As shown, the first drive source 30, the second drive source 40, and the third drive source 50 are all lifting motors.

[0042] The implementation principle of this application's embodiments is as follows:

[0043] Length tilt adjustment (such as headboard raising / footboard lifting) - controls the extension of the first drive source 30;

[0044] Left-side tilt adjustment – ​​controls the extension of the third drive source 50;

[0045] Right-side tilt adjustment – ​​controls the extension of the second drive source 40.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pulley lifting mechanism for a hospital bed, characterized in that, include: Base frame (10), The lifting unit includes a first drive source (30) disposed at one end of the base frame (10) and a flipping component disposed at the other end of the base frame (10). The top of the first drive source (30) and the top of the flipping component are movably connected to the same mounting frame (20). The mounting frame (20) is parallel to the base frame (10) in the initial state. The mounting frame (20) is used to install the bed board. The first drive source (30) and the flipping component cooperate to control the mounting frame (20) to tilt along its length direction. The flipping component is used to control the mounting frame (20) to flip sideways along its width direction.

2. The bed-lifting mechanism according to claim 1, characterized in that: The mounting bracket (20) has a first connecting bracket (31) at one end, and a second connecting bracket (32) is hinged on the first connecting bracket (31). The first driving source (30) is movably connected to the second connecting bracket (32).

3. The bed-lifting mechanism according to claim 2, characterized in that: The first drive source (30) is provided with a first mounting base (33) on the top. The first mounting base (33) is mirror-hinged with a first pulley group (331) on both sides. The second connecting frame (32) is mirror-provided with a first slide rail (321). Each first pulley group (331) is located in the corresponding first slide rail (321).

4. The bed-lifting mechanism according to claim 3, characterized in that: The axis of the hinge point of the first connecting frame (31) and the second connecting frame (32) is perpendicular to the axis of the hinge point of the first mounting base (33) and the first pulley group (331).

5. The bed-lifting mechanism according to claim 1, characterized in that: The flipping assembly includes a second drive source (40) and a third drive source (50) disposed on the base frame (10) at one end away from the first drive source (30), and a linkage frame (60) movably connected to the second drive source (40) and the third drive source (50). The linkage frame (60) has connecting blocks (201) mirror-hinged at both ends, and the two connecting blocks (201) are respectively fixedly connected to the mounting frame (20).

6. The bed-lifting mechanism according to claim 5, characterized in that: The linkage frame (60) includes a first frame (61) and a second frame (62), which are fixedly connected.

7. The bed-lifting mechanism according to claim 6, characterized in that: The third drive source (50) is provided with a third mounting base (52) on top. A second pulley group (51) is mirror-hung on the third mounting base (52). A second slide rail (611) is mirror-hung inside the first frame (61). Each second pulley group (51) is respectively arranged in the corresponding second slide rail (611).

8. The bed-lifting mechanism according to claim 7, characterized in that: The second drive source (40) is provided with a second mounting base (41) on its top, and the second mounting base (41) is hinged to the second frame (62).

9. The bed-lifting mechanism according to claim 8, characterized in that: The axis of the hinge point of the second mounting base (41) and the second frame (62) is parallel to the axis of the hinge point of the third mounting base (52) and the second pulley block (51).

10. The bed-lifting mechanism according to claim 5, characterized in that: The first drive source (30), the second drive source (40) and the third drive source (50) are all lifting motors.

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