Adjustable lower limb rehabilitation bed

Abstract

The invention relates to the technical field of rehabilitation beds, in particular to an adjustable lower limb rehabilitation bed which comprises a bed board and a lower limb rehabilitation exercise mechanism. The lower limb rehabilitation exercise mechanism comprises a thigh bearing rod, a shank bearing rod and a power assembly. The thigh supporting rod comprises a thick rod part and a thin rod part; the thick rod part is arranged on the front side of the thin rod part, the front end is rotationally mounted at the front end of the mounting groove through a bearing, and the rear end slidably sleeves the front end of the thin rod part; a locking assembly is arranged between the thick rod part and the thin rod part; the rear ends of the thin rod parts of the shank supporting rod and the thigh supporting rod are rotationally connected through a bearing; due to the telescopic design of the thigh bearing rod, the length of the thigh bearing rod can be flexibly adjusted according to different requirements of patients, and the thigh bearing rod can adapt to users of different figures; according to the scheme, the bearings are installed at the rotating joints, friction in the movement process can be effectively reduced through application of the bearings, movement smoothness is guaranteed, and the lower limbs of a patient can be naturally and smoothly exercised during rehabilitation training.

Description

Technical Field

[0001] This invention relates to the field of rehabilitation bed technology, specifically to an adjustable lower limb rehabilitation bed. Background Technology

[0002] Patients with lower limb disabilities require rehabilitation training to restore physical function. Considering the patient's physical condition, the training should not be too strenuous and should be individualized based on each patient's specific situation. Currently, a common rehabilitation method is for doctors to apply force to assist patients in performing passive lower limb rehabilitation training, such as assisted leg bending exercises to gradually restore mobility. While traditional lower limb rehabilitation devices can replace manual labor to some extent, they generally suffer from limited functionality and cannot be adjusted according to the patient's lower limb length. This makes it difficult to achieve a balance between the universality of rehabilitation devices and meeting the individual differences of patients. Summary of the Invention

[0003] This invention provides an adjustable lower limb rehabilitation bed to solve the above-mentioned problems.

[0004] The present invention discloses an adjustable lower limb rehabilitation bed, which adopts the following technical solution: An adjustable lower limb rehabilitation bed includes a bed board and a lower limb rehabilitation exercise mechanism; the bed board is arranged at the front and rear, and two mounting slots are provided at the rear end; support legs are fixed under the bed board. Two lower limb rehabilitation exercise mechanisms are provided, with one mechanism installed in each mounting slot.

[0005] The lower limb rehabilitation exercise mechanism includes a thigh support rod, a calf support rod, and a power unit. The thigh support rod is a telescopic rod with its axis positioned front and rear. It includes a thicker section and a thinner section. The thicker section is located in front of the thinner section, with its front end rotatably mounted on the front end of a mounting slot via a bearing, and its rear end slidingly fitted onto the front end of the thinner section. A locking component is provided between the thicker and thinner sections. This locking component restricts sliding between the thicker and thinner sections after the length of the thigh support rod is adjusted. The telescopic design of the thigh support rod allows its length to be flexibly adjusted according to the different needs of patients, adapting to users of different body types.

[0006] The calf support rod is located behind the thigh support rod; the calf support rod's axis is set front and back, and its front end is rotatably connected to the rear end of the thinner part of the thigh support rod via a bearing; a slider is slidably mounted on the calf support rod via a groove in the middle; a foot support plate is rotatably mounted on the slider; a guide assembly is provided at the rear end of the calf support rod; the guide assembly is used to allow the rear end of the calf support rod to slide in the mounting groove in the front-back direction; in this design, bearings are installed at all rotating connections, and the use of bearings can effectively reduce friction during movement, ensure smooth movement, and allow patients to receive natural and smooth lower limb exercises during rehabilitation training.

[0007] The power unit is used to drive the thigh support rod to rotate forward and backward around the front end of the thigh support rod, so that the thigh support rod and the calf support rod form a V shape with the small end facing upward, so as to realize the patient's leg flexion rehabilitation training.

[0008] Furthermore, a knee support is installed between the thinner part of the thigh support rod and the lower leg support rod; the knee support is cylindrical to reduce friction during knee joint movement; the guide assembly includes two slide rods; the two slide rods are distributed on both sides of the lower leg support rod; the axis of the slide rods is fixed in the mounting groove in a front-to-back arrangement; a sleeve is slidably installed on the slide rod; the sleeve is rotatably installed on the rear end of the lower leg support rod via a pivot and a bearing.

[0009] Furthermore, the power assembly includes a push rod; the push rod is located below the thicker part of the thigh support rod; the axis of the push rod is vertically set, the upper end and the thicker part are rotatably connected by a bearing, and the lower end is rotatably connected to an L-shaped rod by a bearing; a connecting plate is fixed under the bed board; the vertex of the included angle of the L-shaped rod is rotatably mounted on the connecting plate by a bearing; a power unit is provided at the other end of the L-shaped rod; the power unit drives the L-shaped rod to reciprocate around the vertex of the included angle of the L-shaped rod.

[0010] Furthermore, a thigh support is fixed to the thicker part of the thigh support rod; the thigh support is an arc plate; a calf support is fixed to the lower leg support rod; the calf support is an arc plate; a first servo motor is fixed inside the slider; the output shaft of the first servo motor is fixedly connected to the foot support plate.

[0011] Furthermore, the power unit includes a mounting base; the mounting base and the bed plate are hinged by bearings; a rotating ring is rotatably mounted on the mounting base; a second servo motor is fixed on the mounting base; the second servo motor drives the rotating ring to rotate forward and backward via a belt; a ball screw is provided inside the rotating ring; the ball screw and the mounting base are in sliding engagement; the ball screw and the rotating ring are in threaded engagement; the movable end of the ball screw and the end of the L-shaped rod away from the top rod are rotatably connected by a bearing. The second servo motor drives the rotating ring to rotate forward and backward via a belt, driving the ball screw to reciprocate, so that the L-shaped rod reciprocates around the vertex of the included angle of the L-shaped rod.

[0012] Furthermore, the locking assembly includes a metal tube clamp; a longitudinal slit is provided at the end of the thicker rod near the thinner rod; the metal tube clamp includes a C-shaped metal plate; the metal plate is threadedly connected to the locking bolt, and the other end is rotatably connected to the locking bolt; the metal tube clamp is fitted onto the thicker rod and is located at the slit; when it is necessary to lock the length of the thigh support rod, the locking bolt is turned to reduce the distance between the two ends of the metal plate, making the slit in the thicker rod smaller, thereby locking the thicker rod and the thinner rod.

[0013] Furthermore, the slider is threaded with a locking bolt; the locking bolt abuts against the calf support rod. Adjust the position of the slider according to the position of the patient's foot, and then turn the locking bolt to tighten the locking bolt and the calf support rod, locking the slider in position on the calf support rod.

[0014] The beneficial effects of this invention are: the telescopic design of the thigh support bar allows the length of the thigh support bar to be flexibly adjusted according to the different needs of patients, adapting to users of different body types.

[0015] Furthermore, bearings are installed at all rotating joints in this design. The use of bearings can effectively reduce friction during movement, ensure smooth movement, and allow patients to receive natural and smooth lower limb exercises during rehabilitation training. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of an adjustable lower limb rehabilitation bed according to the present invention;

[0018] Figure 2 This is a schematic diagram from another angle of an embodiment of an adjustable lower limb rehabilitation bed according to the present invention;

[0019] Figure 3 This is a schematic diagram of the lower limb rehabilitation exercise mechanism of an embodiment of an adjustable lower limb rehabilitation bed according to the present invention.

[0020] In the diagram: 1. Bed board; 3. Thick rod section; 5. L-shaped rod; 6. Lower leg support rod; 7. Thigh support; 8. Slide rod; 9. Sleeve; 10. Lower leg support; 11. Knee joint support; 12. Sliding block; 13. Thin rod section; 14. Foot support plate; 16. Connecting plate; 17. Top rod. Detailed Implementation

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] An embodiment of the adjustable lower limb rehabilitation bed of the present invention, such as... Figures 1 to 3As shown, the device includes a bed board 1 and a lower limb rehabilitation exercise mechanism. The bed board 1 is arranged at the front and back, with two mounting slots at the rear end. Support legs are fixed under the bed board 1. There are two lower limb rehabilitation exercise mechanisms, one of which is installed in each mounting slot.

[0023] The lower limb rehabilitation exercise mechanism includes a thigh support rod, a calf support rod 6, and a power assembly. The thigh support rod is a telescopic rod with its axis set at the front and rear. The thigh support rod includes a thick rod section 3 and a thin rod section 13. The thick rod section 3 is located in front of the thin rod section 13, with its front end rotatably mounted on the front end of the mounting groove via a bearing, and its rear end slidingly fitted onto the front end of the thin rod section 13. A locking assembly is provided between the thick rod section 3 and the thin rod section 13. The locking assembly is used to restrict the sliding between the thick rod section 3 and the thin rod section 13 after adjusting the length of the thigh support rod. The locking assembly includes a metal tube clamp. A longitudinal slit is opened at the end of the thick rod section 3 near the thin rod section 13. The metal tube clamp includes a C-shaped metal plate. The metal plate is threadedly connected to a locking bolt, and the other end is rotatably connected to the locking bolt. The metal tube clamp is fitted onto the thick rod section 3 and is located at the slit. When it is necessary to lock the length of the thigh support rod, the locking bolt is turned to reduce the distance between the two ends of the metal plate, making the slit of the thick rod section 3 smaller, thereby locking the thick rod section 3 and the thin rod section 13. The extendable design of the thigh support bar allows for flexible length adjustment to suit users of different body types and needs. Generally, the thigh length of adult men is typically between 45cm and 55cm, while that of adult women is typically between 40cm and 50cm. In practical use, the thigh support bar's shortest length is 35cm, and its maximum length is 60cm, fully meeting the needs of both adult men and women.

[0024] The calf support rod 6 is located behind the thigh support rod. The calf support rod 6 has its axis positioned front-to-back, and its front end is rotatably connected to the rear end of the thin rod portion 13 of the thigh support rod via a bearing. A slider 12 is slidably mounted on the foot support plate 14 of the calf support rod 6 via a central groove. The foot support plate 14 is rotatably mounted on the slider 12. A guide assembly is located at the rear end of the calf support rod 6. The guide assembly allows the rear end of the calf support rod 6 to slide in the mounting groove along the front-to-back direction. The guide assembly includes two sliding rods 8, distributed on both sides of the calf support rod 6. The sliding rods 8 are fixed in the mounting groove with their axes positioned front-to-back. A sleeve 9 is slidably mounted on the sliding rod 8. The sleeve 9 is rotatably mounted to the rear end of the calf support rod 6 via a pivot and a bearing. In this design, bearings are installed at all rotating connections. The use of bearings effectively reduces friction during movement, ensuring smooth movement and allowing patients to receive natural and fluid lower limb exercises during rehabilitation training. A thigh support 7 is fixed to the thicker part 3 of the thigh support rod; the thigh support 7 is an arc-shaped plate; a calf support 10 is fixed to the lower leg support rod 6; the calf support 10 is an arc-shaped plate; a first servo motor is fixed inside the slider 12; the output shaft of the first servo motor is fixedly connected to the foot support plate 14 to drive the ankle joint movement. The first servo motor at the patient's ankle joint supports independent control, which can carry out specialized rehabilitation training for the foot and meet diverse joint function recovery needs.

[0025] A locking bolt is threaded onto slider 12; the locking bolt abuts against the calf support rod 6. After adjusting the position of slider 12 according to the patient's foot position, the locking bolt is then turned to tighten it against the calf support rod 6, locking slider 12 in place on the calf support rod 6. Massage components are integrated into the thigh support 7 and calf support 10. When the patient performs passive rehabilitation activities, these massage components simultaneously provide massage stimulation, promoting blood circulation in the lower limb muscles through physical action, stimulating muscle vitality, thereby assisting the patient in accelerating the recovery of limb function and shortening the rehabilitation period.

[0026] A knee support 11 is installed between the thigh support rod thin section 13 and the calf support rod 6; the knee support 11 is cylindrical to reduce friction during knee joint movement.

[0027] The power assembly drives the thigh support rod to rotate clockwise and counterclockwise around its front end, causing the thigh support rod and calf support rod 6 to form a V-shape with the smaller end facing upwards, thus enabling the patient to perform leg flexion rehabilitation training. The power assembly includes a top rod 17; the top rod 17 is located below the thicker part 3 of the thigh support rod; the axis of the top rod 17 is vertically set, and its upper end is rotatably connected to the thicker part 3 via a bearing, while its lower end is rotatably connected to an L-shaped rod 5 via a bearing; a connecting plate 16 is fixed under the bed board 1; the vertex of the included angle of the L-shaped rod 5 is rotatably mounted on the connecting plate 16 via a bearing; a power unit is located at the other end of the L-shaped rod 5; the power unit drives the L-shaped rod 5 to reciprocate around the vertex of the included angle of the L-shaped rod 5. The power unit includes a mounting base; the mounting base and the bed plate 1 are hinged by bearings; a rotating ring is rotatably mounted on the mounting base; a second servo motor is fixed on the mounting base; the second servo motor drives the rotating ring to rotate forward and backward via a belt; a ball screw is installed inside the rotating ring; the ball screw and the mounting base are in sliding engagement; the ball screw and the rotating ring are in threaded engagement; the movable end of the ball screw and the end of the L-shaped rod 5 away from the top rod are rotatably connected by a bearing. The second servo motor drives the rotating ring to rotate forward and backward via a belt, driving the ball screw to reciprocate, so that the L-shaped rod 5 reciprocates around the apex of the included angle of the L-shaped rod 5.

[0028] Based on the above embodiments, the working principle and process of the present invention are as follows: In use, the telescopic design of the thigh support rod allows the length of the thigh support rod to be flexibly adjusted according to the different needs of the patient, adapting to users of different body sizes.

[0029] Before the disabled patient lies on the rehabilitation bed, the lengths of the patient's thigh and calf are roughly measured, and the positions of the thicker part 3 and the thinner part 13 of the thigh support rod, as well as the slider 12 on the calf support rod 6, are roughly adjusted. The patient is then laid on the rehabilitation bed, and further adjustments are made so that the thigh rests on the thigh support 7 and the calf rests on the calf support 10. After adjusting the length of the thigh support rod, the patient's thigh and calf are secured to the thigh support 7 and calf support 10 with straps to prevent accidents. A power assembly drives the thigh support rod to rotate clockwise and counterclockwise around its front end, creating a V-shape with the smaller end facing upwards, enabling the patient to perform leg flexion rehabilitation training. Bearings are installed at all rotating connections in this system. The use of bearings effectively reduces friction during movement, ensuring smooth movement and allowing the patient's lower limbs to receive natural and fluid exercise during rehabilitation.

[0030] The coordinated operation of the first and second servo motors enables linked movements of the thigh, knee, calf, and ankle joints, accurately simulating natural human gait and providing a near-realistic gait rehabilitation training experience for disabled patients. Simultaneously, the first servo motor at the patient's ankle joint can be controlled independently, allowing for specialized foot rehabilitation training to meet diverse joint function recovery needs.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable lower limb rehabilitation bed, characterized in that: Including bed boards and lower limb rehabilitation exercise equipment; The bed board is positioned at the front and back, with two mounting slots at the rear end; support legs are fixed under the bed board. There are two lower limb rehabilitation exercise mechanisms, one of which is installed in each mounting slot. Each lower limb rehabilitation exercise mechanism includes a thigh support rod, a calf support rod, and a power assembly. The thigh support rod is a telescopic rod with its axis extending forward and backward. It includes a thicker rod section and a thinner rod section. The thicker rod section is located in front of the thinner rod section, with its front end rotatably mounted to the front end of the mounting slot via a bearing, and its rear end slidably fitted onto the front end of the thinner rod section. A locking assembly is provided between the thicker and thinner rod sections. This locking assembly restricts sliding between the thicker and thinner rod sections after the length of the thigh support rod is adjusted. The calf support rod is located behind the thigh support rod; the calf support rod is axially arranged front and rear, and its front end is rotatably connected to the rear end of the thinner part of the thigh support rod through a bearing; a slider is slidably mounted on the calf support rod through a groove in the middle; a foot support plate is rotatably mounted on the slider; a guide assembly is provided at the rear end of the calf support rod; the guide assembly is used to allow the rear end of the calf support rod to slide in the mounting groove in the front-rear direction; The power unit is used to drive the thigh support rod to rotate forward and backward around the front end of the thigh support rod, so that the thigh support rod and the calf support rod form a V shape with the small end facing upward.

2. The adjustable lower limb rehabilitation bed according to claim 1, characterized in that: A knee support is installed between the thin part of the thigh support rod and the calf support rod; the knee support is cylindrical; the guide assembly includes two slide rods; the two slide rods are distributed on both sides of the calf support rod; the axis of the slide rods is fixed in the mounting groove at the front and rear; a sleeve is slidably installed on the slide rod; the sleeve is rotatably installed through a shaft and the rear end of the calf support rod via a bearing.

3. The adjustable lower limb rehabilitation bed according to claim 2, characterized in that: The power assembly includes a push rod; the push rod is located below the thicker part of the thigh support rod; the push rod axis is vertically set, the upper end and the thicker part are rotatably connected by a bearing, and the lower end is rotatably connected to an L-shaped rod by a bearing; a connecting plate is fixed under the bed board; the vertex of the L-shaped rod is rotatably mounted on the connecting plate by a bearing; a power unit is provided at the other end of the L-shaped rod; the power unit drives the L-shaped rod to reciprocate around the vertex of the L-shaped rod.

4. An adjustable lower limb rehabilitation bed according to claim 3, characterized in that: A thigh support is fixed to the thicker part of the thigh support rod; the thigh support is an arc plate; a calf support is fixed to the lower leg support rod; the calf support is an arc plate; a first servo motor is fixed inside the slider; the output shaft of the first servo motor is fixedly connected to the foot support plate.

5. An adjustable lower limb rehabilitation bed according to claim 3, characterized in that: The power unit includes a mounting base; the mounting base and the bed plate are hinged by bearings; a rotating ring is rotatably mounted on the mounting base; a second servo motor is fixed on the mounting base; the second servo motor drives the rotating ring to rotate forward and backward via a belt; a ball screw is provided inside the rotating ring; the ball screw and the mounting base are in sliding fit; the ball screw and the rotating ring are in threaded fit; the movable end of the ball screw and the end of the L-shaped rod away from the push rod are rotatably connected by bearings.

6. An adjustable lower limb rehabilitation bed according to claim 5, characterized in that: The locking assembly includes a metal tube clamp; a longitudinal slit is provided at the end of the thicker rod near the thinner rod; the metal tube clamp includes a C-shaped metal plate; the metal plate is threadedly connected to the locking bolt, and the other end is rotatably connected to the locking bolt; the metal tube clamp is fitted onto the thicker rod and is located at the slit.

7. An adjustable lower limb rehabilitation bed according to claim 6, characterized in that: The slider is threaded with a clamping bolt; the clamping bolt abuts against the lower leg support rod.

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