Bed movement assisting device for hemodialysis patient

Abstract

The invention discloses an on-bed movement assisting device for hemodialysis patients, which comprises a bed board, a movement mechanism and a massage mechanism, the movement mechanism is arranged at one end of the bed board for leg movement of the patients, the massage mechanism is arranged in the middle of the bed board to massage the waist and hip of the patients, and the movement mechanism is connected with the massage mechanism through a linkage mechanism. When a patient uses the movement mechanism, the massage mechanism is driven by the linkage mechanism to massage the waist and buttocks of the patient. Vein return is promoted through lower limb movement similar to bicycle pedaling, the occurrence rate of dialysis-related hypotension can be reduced, meanwhile, the leg movement requirement of a patient suffering from the restless leg syndrome is met, the massage mechanism adopts the design of a matrix type ejector rod and an elastic covering face, the main pressed area of the waist and hip can be covered, and muscles can be effectively relieved through an arc-shaped massage head; the faster the patient moves, the higher the massage frequency is, on-demand massage is achieved, no extra power source is needed, a circuit is prevented from interfering with dialysis equipment, and the treatment safety and comfort are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical assistive devices, and in particular to a bed exercise assistive device for hemodialysis patients. Background Art

[0002] Hemodialysis is the primary treatment for patients with end-stage renal disease, requiring patients to remain in bed for approximately four hours per dialysis session. Prolonged bed rest can easily lead to a variety of complications: approximately 30% of patients experience hypotension during dialysis, as insufficient lower limb mobility leads to obstructed venous return. Traditional interventions rely on medication or positional adjustments, lacking effective measures to actively promote circulation. Approximately 20% of patients experience restless legs syndrome, characterized by a compulsive need for leg movement. Existing beds lack adaptive exercise devices, and patients' independent movements can easily affect the safety of the dialysis line. Leg cramps caused by electrolyte imbalances occur in over 40% of patients, and traditional manual pressure or standing interventions carry the risk of catheter dislodgement and significant pain for patients. Furthermore, over 60% of patients experience low back and hip muscle soreness due to prolonged bed rest. Existing beds only provide static support, requiring additional reliance on manual massage or external devices, increasing the burden of care.

[0003] Some dialysis centers install simple pedal-type exercise tools at the end of the bed to improve hypotension symptoms through active lower limb exercise, but this type of device has obvious defects, such as: it only has a single exercise function and cannot simultaneously relieve back and waist muscle fatigue; the exercise and massage functions operate independently, and the massage frequency cannot be adaptively adjusted according to the patient's exercise intensity, resulting in insufficient comfort; existing devices mostly rely on external power sources, there is a risk of circuit interference with dialysis equipment, and the complex structure increases the difficulty of nursing operations. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide a bed exercise assist device for hemodialysis patients, which can adjust the massage frequency in conjunction with the intensity of exercise, so as to improve circulation metabolism, relieve spasm symptoms, and enhance the comfort and safety of the patient's dialysis process.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a bed exercise assisting device for hemodialysis patients, including a bed board, and also including a motion mechanism and a massage mechanism arranged on the bed board. The motion mechanism is arranged at one end of the bed board for the patient to perform leg exercises, and the massage mechanism is arranged in the middle of the bed board to massage the patient's waist and buttocks. The motion mechanism and the massage mechanism are connected by a group of linkage mechanisms. When the patient uses the motion mechanism to exercise, the massage mechanism massages the patient's waist and buttocks under the drive of the linkage mechanism.

[0006] Furthermore, the movement mechanism includes two columns and two footrests. The two columns are arranged on the upper end surface of the bed board at intervals on the left and right. The two footrests are respectively rotatably arranged on vertical walls away from each other of the two columns. The two footrests are connected to each other through a first connecting rod so that they can rotate synchronously.

[0007] Furthermore, the massage mechanism includes a first slot provided on the bed board, an elastic covering provided in the first slot, and a top rod provided in the first slot. The first slot passes through the bed board in a vertical direction, the elastic covering horizontally covers the upper end opening of the first slot to block the upper end opening of the first slot, the top rod is rotatably provided between the two lateral side walls of the first slot and the top rod is connected to the linkage mechanism. When the top rod rotates with the movement of the linkage mechanism, its end can lift the elastic covering in the longitudinal direction.

[0008] Furthermore, the linkage mechanism includes a first linkage component arranged in the column and a second linkage component arranged on the lower end surface of the bed board. The first linkage component is connected to the foot pedal and converts the circular motion of the foot pedal into vertical motion. The second linkage component is connected to the first linkage component and the top rod to convert the vertical motion of the first linkage component into horizontal motion to drive the top rod to move.

[0009] Furthermore, the first linkage assembly includes a turntable, a convex button, a movable frame and a transmission rod, a cavity is opened in the column, the turntable is vertically rotatably mounted on the inner wall of the cavity and the turntable is coaxially fixedly connected to the corresponding foot pedal so as to be able to rotate with the rotation of the foot pedal, the convex button is arranged at an eccentric position on one axial side of the turntable, the movable frame is vertically arranged around the outer circumference of the convex button and the height of the internal space of the movable frame matches the outer diameter of the convex button, and the width matches the horizontal movement stroke of the convex button, the transmission rod is fixedly mounted at the lower end of the movable frame, and the transmission rod is limited in the cavity by a limit member, and under the limiting action of the limit member, the transmission rod and the movable frame move vertically.

[0010] Furthermore, the limiting member is a U-shaped block, which is fixedly arranged on a side wall of the cavity on the same side as the turntable. A limiting hole is vertically opened in the middle of the U-shaped block. The inner diameter of the limiting hole matches the outer diameter of the transmission rod for the transmission rod to pass through it. The transmission rod can slide vertically relative to the limiting hole, and the lower end of the transmission rod passes through the bed board and extends downward to be connected to the second linkage assembly.

[0011] Furthermore, the second linkage assembly includes a boss, a second connecting rod, and a movable plate, wherein the movable plate is horizontally arranged at the lower end of the bed plate and can slide longitudinally relative to the bed plate, and one end of the second connecting rod is fixedly connected to the movable plate, and the other end is inclined from bottom to top in a direction close to the transmission rod;

[0012] A through groove is provided on the second connecting rod along its length direction, and the through groove passes through the second connecting rod in the transverse direction. The boss is horizontally arranged at the lower end of the transmission rod, and the width of the through groove matches the outer diameter of the boss so that the boss can slide in the through groove along the length direction of the through groove.

[0013] Furthermore, a second slot is formed on the movable plate at a position corresponding to the first slot from top to bottom, the lower end of the push rod extends downward into the second slot and the lower end of the push rod is rotatably connected to the two lateral walls of the second slot, a third connecting rod is horizontally fixed between the two lateral walls of the first slot, and a through-groove is provided in the middle of the push rod for the third connecting rod to pass through, the through-groove is opened along the length direction of the push rod, and the third connecting rod can slide in the through-groove along the length direction of the through-groove.

[0014] Furthermore, the first linkage assembly comprises two groups which are separately arranged in the two upright posts, and the two groups of the first linkage assembly are respectively connected to the lateral sides of the movable plate to drive the movable plate to move longitudinally.

[0015] Furthermore, the massage mechanism includes a plurality of groups arranged in a matrix on the bed board, and the second slot and the third connecting rod also have a plurality of groups corresponding to the plurality of groups of massage mechanisms.

[0016] The bed exercise assisting device for hemodialysis patients of the present invention has at least the following beneficial effects: through lower limb exercise similar to pedaling a bicycle, venous return is actively promoted, the incidence of dialysis-related hypotension can be reduced, and the leg activity needs of patients with restless legs syndrome can be met, avoiding the risk of dialysis pipeline caused by autonomous activity. The regular muscle contraction can reduce cramps caused by electrolyte imbalance, replace traditional manual intervention methods, and reduce the risk of catheter detachment; the massage mechanism adopts a matrix-type top rod and elastic covering design, which can cover the main pressure areas of the waist and buttocks, and the arc-shaped massage head can effectively relieve muscles; the faster the patient's exercise speed, the higher the massage frequency, achieving on-demand massage without the need for an additional power source, avoiding circuit interference with the dialysis equipment, and improving treatment safety and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 The structure of an embodiment of the bed exercise assisting device for hemodialysis patients of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of an embodiment of the bed exercise assisting device for hemodialysis patients of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 for Figure 2 Schematic diagram of the local structure at A in the middle;

[0021] Figure 4 A partial cross-sectional view of an embodiment of the bed exercise assisting device for hemodialysis patients according to the present invention Figure 1 ;

[0022] Figure 5 A partial cross-sectional view of an embodiment of the bed exercise assisting device for hemodialysis patients according to the present invention Figure 2 ;

[0023] Figure 6 for Figure 5 Schematic diagram of the local structure at B in the middle;

[0024] Figure 7 Schematic diagram of the structure of the linkage mechanism in one embodiment of the bed movement assisting device for hemodialysis patients of the present invention.

[0025] The meanings of the reference numerals in the accompanying drawings are:

[0026] Bed board 1, motion mechanism 2, column 21, first connecting rod 22, L-shaped rod 23, pedal 24, cavity 25, massage mechanism 3, first slot 31, elastic covering 32, push rod 33, second slot 34, third connecting rod 35, penetration slot 36, massage head 37, linkage mechanism 4, first linkage component 41, turntable 411, convex button 412, moving frame 413, transmission rod 414, limiter 415, limit hole 416, second linkage component 42, convex column 421, second connecting rod 422, moving plate 423, horizontal column 424, slide groove 425, slide column 426, through groove 427. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Reference Figure 1 and Figure 2 The bed exercise assisting device for hemodialysis patients of the present invention comprises a bed board 1, and a movement mechanism 2 and a massage mechanism 3 disposed on the bed board 1. The movement mechanism 2 is disposed at one end of the bed board 1 for the patient to exercise their legs, and the massage mechanism 3 is disposed in the middle of the bed board 1 for massaging the patient's waist and buttocks. The movement mechanism 2 and the massage mechanism 3 are connected by a linkage mechanism 4. When the patient exercises using the movement mechanism 2, the massage mechanism 3, driven by the linkage mechanism 4, massages the patient's waist and buttocks.

[0029] The motion mechanism 2 includes two columns 21 and two footrests. The two columns 21 are arranged on the upper end surface of the bed board 1 at intervals on the left and right, and the two footrests are respectively rotatably arranged on the vertical wall surfaces away from each other of the two columns 21. The two footrests are connected to each other through a first connecting rod 22 so that they can rotate synchronously. Specifically, the footrest includes an L-shaped rod 23 and a pedal 24. The horizontal part of the L-shaped rod 23 is rotatably connected to the corresponding column 21. The horizontal parts of the two L-shaped rods 23 are coaxially arranged. The vertical part of the L-shaped rod 23 is formed by extending the horizontal part, and the pedal 24 is rotatably arranged at the end of the vertical part. Under the connection of the first connecting rod 22, the two L-shaped rods 23 are always in opposite directions (as shown in the attached figure). Figure 1 Status shown).

[0030] Reference Figures 3 to 7 The linkage mechanism 4 includes a first linkage component 41 provided in the column 21 and a second linkage component 42 provided on the lower end surface of the bed board 1. The first linkage component 41 is connected to the foot pedal and converts the circular motion of the foot pedal into vertical motion. The second linkage component 42 is connected to the first linkage component 41 and the top rod 33 to convert the vertical motion of the first linkage component 41 into horizontal motion to drive the massage mechanism 3 to work.

[0031] The first linkage assembly 41 comprises two groups, each located within the two upright posts 21. Each group of the first linkage assembly 41 includes a rotating disk 411, a knob 412, a movable frame 413, and a transmission rod 414. A cavity 25 is defined within the upright post 21 for mounting the first linkage assembly 41. The rotating disk 411 is vertically rotatably mounted on the inner wall of the cavity 25 and coaxially fixedly connected to the horizontal portion of the corresponding L-shaped rod 23, allowing it to rotate with the rotation of the footrest. The knob 412 is located eccentrically on the side of the rotating disk 411 away from the corresponding footrest. The movable frame 413 is vertically arranged around the outer periphery of the knob 412. The height of the space enclosed by the movable frame 413 matches the outer diameter of the knob 412, and its width matches the horizontal displacement distance of the knob 412. The knob 412 can slide within the movable frame 413. The transmission rod 414 is fixedly mounted on the lower end of the movable frame 413, and is limited in the cavity 25 by a limiting member 415. Under the limiting action of the limiting member 415, the transmission rod 414 can move vertically up and down along with the movable frame 413. The limiting member 415 is a U-shaped block, which is fixedly mounted on a side wall of the cavity 25 on the same side as the turntable 411. A limiting hole 416 is vertically provided in the middle of the U-shaped block. The inner diameter of the limiting hole 416 matches the outer diameter of the transmission rod 414 so that the transmission rod 414 can pass therethrough. The transmission rod 414 can slide vertically relative to the limiting hole 416. The lower end of the transmission rod 414 passes through the bed board 1 and extends downward to connect with the second linkage assembly 42. The first connecting rod 22 is horizontally disposed between the two rotating disks 411 , and both ends of the first connecting rod 22 are fixedly connected to the two convex buttons 412 , respectively. The first connecting rod 22 and the two convex buttons 412 are coaxial.

[0032] The second linkage assembly 42 includes a boss 421, a second connecting rod 422 and a movable plate 423. The movable plate 423 is horizontally arranged at the lower end of the bed board 1 and can slide longitudinally relative to the bed board 1. Specifically, Figure 2 and Figure 3As shown, two horizontal posts 424 are provided on the lower end surface of the bed board 1 at positions corresponding to the lateral sides of the movable plate 423. The two horizontal posts 424 are provided with horizontal slide grooves 425 on one side of the movable plate 423. Slide posts 426 matching the slide grooves 425 are provided on both lateral sides of the movable plate 423 at positions corresponding to the slide grooves 425. The slide posts 426 are horizontally slidably connected to the slide grooves 425. The second connecting rod 422 is tilted, and the lower end of the second connecting rod 422 is fixedly connected to the end of the movable plate 423 close to the column 21. The upper end of the second connecting rod 422 is slidably connected to the lower end of the corresponding transmission rod 414. Specifically, a through slot 427 is provided on the second connecting rod 422 along its own length. The through slot 427 passes through the second connecting rod 422 horizontally along the width direction of the bed board 1. The boss 421 is fixed to the lower end of the transmission rod 414, and the axis of the boss 421 is horizontally arranged along the width direction of the bed board 1. The width of the through groove 427 matches the outer diameter of the boss 421 so that the boss 421 can slide in the through groove 427 along the length direction of the through groove 427.

[0033] The massage mechanism 3 includes several groups arranged in a matrix on the bed board 1. Each group of the massage mechanism 3 includes a first slot 31 provided on the bed board 1, an elastic covering 32 provided within the first slot 31, and a push rod 33 provided within the first slot 31. The first slot 31 vertically extends through the bed board 1, and the elastic covering 32 horizontally covers the upper opening of the first slot 31 to shield the upper opening of the first slot 31. A second slot 34 is recessed from top to bottom on the movable plate 423 at a position corresponding to the first slot 31. The push rod 33 is rotatably connected to both the first slot 31 and the second slot 34. Specifically, the lower end of the push rod 33 extends into the second slot 34 and is rotatably connected to the lateral side walls of the second slot 34. The upper end of the push rod 33 extends upward into the first slot 31. A third connecting rod 35 is fixedly disposed horizontally between the two lateral walls of the first slot 31. The axis of the third connecting rod 35 is disposed horizontally along the width of the bed board 1. A through-groove 36 is disposed in the middle portion of the top rod 33 along its length. The through-groove 36 extends horizontally through the top rod 33 along the width of the bed board 1. The third connecting rod 35 is inserted through the through-groove 36, allowing the top rod 33 to slide and rotate relative to the third connecting rod 35, thereby achieving a rotational connection between the top rod 33 and the first slot 31. A massage head 37 is fixedly disposed at the upper end of the top rod 33. The width of the massage head 37 matches the width of the first slot 31, and the end of the massage head 37 is arc-shaped to provide a higher level of massage for the patient's body.

[0034] One embodiment of the in-bed exercise assist device for hemodialysis patients of the present invention operates as follows: During use, the patient lies flat on the bed board 1. When not exercising, the patient rests their feet between the two uprights 21. When exercising, the patient places their feet on the two pedals 24, performing a bicycle-like motion. When the two pedals rotate, the two turntables 411 also rotate. During the rotation of the turntables 411, when the knob 412 moves from the top to the bottom of its travel, it also drives the movable frame 413 and the transmission rod 414 from the top to the bottom of their travel. When the transmission rod 414 moves downward, it drives the knob 421 downward. With the cooperation of the inclined through-slot 427, the second connecting rod 422 and the movable plate 423 as a whole move horizontally toward the transmission rod 414. When the movable plate 423 moves, the lower end position of the push rod 33 is changed. With the cooperation of the third connecting rod 35 and the through groove 36, the push rod 33 rotates around the connection point between itself and the second slot 34. The massage head 37 lifts the elastic covering 32 upward and protrudes out of the first slot 31 according to the movement trajectory of the end of the push rod 33.

[0035] As the knob 412 moves from its lowest point to its highest point, the movable frame 413, the transmission rod 414, and the boss 421 also move upward. The second connecting rod 422 and the movable plate 423, in concert with the inclined through-slot 427, move horizontally away from the transmission rod 414. At this point, the push rod 33 rotates in the opposite direction, centered about its connection point with the second slot 34. The massage head 37 gradually moves downward, away from the elastic covering 32 and back into the first slot 31, following the trajectory of the push rod 33's end. As the knob 412 repeatedly moves up and down, the push rod 33 swings back and forth in both positive and negative directions, lifting the elastic covering 32 and producing a massage effect. The faster the patient steps on the pedal, the faster the push rod 33 swings, resulting in a faster massage.

[0036] Compared with the prior art, the bed exercise assisting device for hemodialysis patients of the present invention actively promotes venous return through lower limb exercise similar to pedaling a bicycle, which can reduce the incidence of dialysis-related hypotension, meet the leg activity needs of patients with restless legs syndrome, avoid the risk of dialysis pipeline caused by autonomous activity, and regular muscle contraction can reduce cramps caused by electrolyte imbalance, replace traditional manual intervention methods, and reduce the risk of catheter detachment; the massage mechanism adopts a matrix-type top rod and elastic covering design, which can cover the main pressure areas of the waist and buttocks, and the arc-shaped massage head can effectively relieve muscles; the faster the patient's movement speed, the higher the massage frequency, achieving on-demand massage without the need for an additional power source, avoiding circuit interference with dialysis equipment, and improving treatment safety and comfort.

Claims

1. A bed exercise assisting device for hemodialysis patients, comprising a bed board, characterized in that: It also includes a motion mechanism and a massage mechanism provided on the bed board. The motion mechanism is provided at one end of the bed board for the patient to exercise his legs, and the massage mechanism is provided in the middle of the bed board to massage the patient's waist and buttocks. The motion mechanism and the massage mechanism are connected by a group of linkage mechanisms. When the patient uses the motion mechanism to exercise, the massage mechanism massages the patient's waist and buttocks under the drive of the linkage mechanism.

2. The bed exercise assisting device for hemodialysis patients according to claim 1, characterized in that: The motion mechanism includes two columns and two footrests. The two columns are arranged on the upper end surface of the bed board at intervals on the left and right. The two footrests are respectively rotatably arranged on the vertical wall surfaces away from each other of the two columns. The two footrests are connected to each other through a first connecting rod so that they can rotate synchronously.

3. The bed exercise assisting device for hemodialysis patients according to claim 2, characterized in that: The massage mechanism includes a first slot provided on the bed board, an elastic covering provided in the first slot, and a push rod provided in the first slot. The first slot passes through the bed board in a vertical direction. The elastic covering horizontally covers the upper end opening of the first slot to block the upper end opening of the first slot. The push rod is rotatably provided between the two lateral side walls of the first slot and is connected to the linkage mechanism. When the push rod rotates with the movement of the linkage mechanism, its end can lift the elastic covering in the longitudinal direction.

4. The bed exercise assisting device for hemodialysis patients according to claim 3, characterized in that: The linkage mechanism includes a first linkage component arranged in the column and a second linkage component arranged on the lower end surface of the bed board. The first linkage component is connected to the foot pedal and converts the circular motion of the foot pedal into vertical motion. The second linkage component is connected to the first linkage component and the top rod to convert the vertical motion of the first linkage component into horizontal motion to drive the top rod to move.

5. The bed exercise assisting device for hemodialysis patients according to claim 4, characterized in that: The first linkage assembly includes a turntable, a convex button, a moving frame and a transmission rod. A cavity is opened in the column. The turntable is vertically rotatably mounted on the inner wall of the cavity and the turntable is coaxially fixedly connected to the corresponding foot pedal so as to be able to rotate with the rotation of the foot pedal. The convex button is arranged at an eccentric position on one axial side of the turntable. The moving frame is vertically arranged around the outer circumference of the convex button and the height of the internal space of the moving frame matches the outer diameter of the convex button, and the width matches the horizontal movement stroke of the convex button. The transmission rod is fixedly mounted on the lower end of the moving frame, and the transmission rod is limited in the cavity by a limit member. Under the limiting action of the limit member, the transmission rod and the moving frame move vertically.

6. The bed exercise assisting device for hemodialysis patients according to claim 5, characterized in that: The limiting part is a U-shaped block, which is fixedly arranged on a side wall of the cavity on the same side as the turntable. A limiting hole is vertically opened in the middle of the U-shaped block. The inner diameter of the limiting hole matches the outer diameter of the transmission rod for the transmission rod to pass through it. The transmission rod can slide vertically relative to the limiting hole. The lower end of the transmission rod passes through the bed board and extends downward to be connected to the second linkage assembly.

7. The bed exercise assisting device for hemodialysis patients according to claim 6, characterized in that: The second linkage assembly includes a protruding column, a second connecting rod, and a movable plate. The movable plate is horizontally arranged at the lower end of the bed plate and can slide longitudinally relative to the bed plate. One end of the second connecting rod is fixedly connected to the movable plate, and the other end is inclined from bottom to top toward the direction close to the transmission rod. A through groove is provided on the second connecting rod along its length direction, and the through groove passes through the second connecting rod in the transverse direction. The boss is horizontally arranged at the lower end of the transmission rod, and the width of the through groove matches the outer diameter of the boss so that the boss can slide in the through groove along the length direction of the through groove.

8. The bed exercise assisting device for hemodialysis patients according to claim 7, characterized in that: A second slot is formed on the movable plate at a position corresponding to the first slot from top to bottom, the lower end of the push rod extends downward into the second slot and the lower end of the push rod is rotatably connected to the two lateral walls of the second slot, a third connecting rod is horizontally fixed between the two lateral walls of the first slot, a through-groove is provided horizontally through the middle part of the push rod for the third connecting rod to pass through, the through-groove is opened along the length direction of the push rod, and the third connecting rod can slide in the through-groove along the length direction of the through-groove.

9. The bed exercise assisting device for hemodialysis patients according to claim 7, characterized in that: The first linkage assembly comprises two groups which are separately arranged in the two upright posts. The two groups of the first linkage assembly are respectively connected to the transverse sides of the movable plate to drive the movable plate to move longitudinally.

10. The bed exercise assisting device for hemodialysis patients according to claim 8, characterized in that: The massage mechanism includes a plurality of groups arranged in a matrix on the bed board, and the second slot and the third connecting rod also have a plurality of groups corresponding to the plurality of groups of massage mechanisms.

Images