Knee joint flexion and extension position training device

By designing an adjustable-angle knee flexion and extension posture training device, the problems of high cost and complex operation of existing devices are solved, enabling patients to adjust and fix themselves independently, making it suitable for postoperative patients' independent rehabilitation training.

CN223861230UActive Publication Date: 2026-02-03SHANDONG PROVINCIAL PUBLIC HEALTH CLINICAL CENT
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Patent Information

Application Number
CN202520030945.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2026-02-03
Estimated Expiration
2035-01-07

AI Technical Summary

Technical Problem

Existing knee flexion and extension posture training devices are expensive and complex in structure, require professional guidance, and are difficult for patients to use independently, especially unsuitable for postoperative patients to train independently in the ward or at home.

Method used

A knee flexion and extension posture training device was designed, comprising a base plate, a thigh support plate, a calf support plate, and a foot pedal. The angle of the support plate can be adjusted and fixed through snap-fit ​​units and elastic connectors. It is equipped with straps or foot limiting plates to facilitate patients' self-adjustment and fixation, simplifying the operation process.

Benefits of technology

It allows patients to independently adjust the training angle and fix their legs, reducing usage costs and making it suitable for postoperative patients to train independently in the ward or at home, thus improving the flexibility and applicability of the training.

✦ Generated by Eureka AI based on patent content.

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Abstract

A knee joint flexion and extension body position training device comprises a bottom plate, a thigh supporting plate, a shank supporting plate and a pedal plate which are hinged in sequence, the bottom plate is horizontally arranged on the lowest portion, a plurality of clamping grooves are formed in the bottom plate in the length direction of the bottom plate, the pedal plate is in sliding connection with the bottom plate, and the pedal plate is connected with the clamping grooves in a clamped mode through clamping units; the clamping unit comprises a clamping positioning rod, the clamping positioning rod penetrates through the pedal in the vertical direction to be connected with the clamping groove in an inserted mode, the clamping positioning rod is elastically connected with the pedal through an elastic connecting piece, and the position of the clamping positioning rod in the vertical direction is adjustable. According to the knee joint rehabilitation training device, the pedal is positioned on the clamping groove through the clamping unit, so that the angle of the thigh supporting plate and the angle of the shank supporting plate are fixed, the leg of a patient is placed on the thigh supporting plate and the shank supporting plate, the effect of knee joint rehabilitation training of the patient is achieved, and the knee joint rehabilitation training effect is achieved by adjusting the position of the clamping unit in the clamping groove. Therefore, the position of the pedal on the bottom plate can be adjusted to adjust the angles of the thigh supporting plate and the shank supporting plate.
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Description

Technical Field

[0001] This utility model relates to the field of knee flexion and extension posture training technology, specifically a knee flexion and extension posture training device. Background Technology

[0002] Knee flexion and extension exercises are common in rehabilitation and sports training, designed to improve knee joint flexibility, stability, and muscle strength. These exercises are crucial for rehabilitation after knee injuries, prevention of knee problems, and improvement of athletic performance.

[0003] Current technology for knee flexion and extension posture training for patients generally uses rehabilitation training devices. These devices are expensive, complex in structure, and require professional guidance. Patients may need some time to master their use. They are not suitable for postoperative patients in the ward or for discharged patients at home. Their applicability is limited. Furthermore, for patients with mild symptoms, they cannot train independently and must rely on medical staff or family members to perform the training. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a knee joint flexion and extension posture training device.

[0005] The technical solution of this utility model is as follows:

[0006] A knee flexion and extension posture training device includes a base plate, a thigh support plate, a calf support plate, and a foot pedal that are hinged together in sequence. The base plate is horizontally positioned at the bottom, and the thigh support plate, calf support plate, and foot pedal are all located above the base plate. The base plate has multiple locking grooves along its length. The foot pedal slides against the base plate in the length direction of the base plate. The foot pedal is locked into the locking grooves through locking units.

[0007] The snap-fit ​​unit includes a snap-fit ​​positioning rod, which passes through the foot pedal vertically and is inserted into the snap-fit ​​slot. The snap-fit ​​positioning rod is elastically connected to the foot pedal through an elastic connector, and its position is adjustable in the vertical direction. The elastic connector is a compression spring. Under normal conditions, the snap-fit ​​positioning rod can be pressed down into the snap-fit ​​slot. When the snap-fit ​​positioning rod is lifted, the compression spring can be compressed, causing the snap-fit ​​positioning rod to move upward and disengage from the snap-fit ​​slot. This facilitates moving the position of the foot pedal on the base plate, thereby adjusting the angle between the thigh support plate and the calf support plate.

[0008] The thigh support plate and the calf support plate are hinged at their adjacent ends, allowing them to be adjusted to any angle on the base plate. For example, when the angle of the thigh support plate and the calf support plate is adjusted to 90° or other angles that are conducive to the patient's knee joint training, the foot pedal is positioned on the locking groove through the locking unit, thereby fixing the angle of the thigh support plate and the calf support plate. Placing the patient's leg on the thigh support plate and the calf support plate can achieve the effect of knee joint rehabilitation training. By adjusting the position of the locking unit in the locking groove, the position of the foot pedal on the base plate can be adjusted, thereby adjusting the angle of the thigh support plate and the calf support plate.

[0009] The connection structure between the aforementioned snap-fit ​​positioning rod and the foot pedal is as follows: a through hole is provided on the foot pedal along the vertical direction, the snap-fit ​​positioning rod passes through the through hole, and an elastic connector is sleeved on the snap-fit ​​positioning rod. One end of the elastic connector is connected to the upper part of the through hole, and the other end is connected to the lower part of the snap-fit ​​positioning rod.

[0010] The structure of the snap-fit ​​positioning rod is as follows: the height of the snap-fit ​​positioning rod is higher than the vertical distance from the bottom surface of the snap-fit ​​groove to the top surface of the foot pedal. The upper part of the snap-fit ​​positioning rod is equipped with an adjustment component located above the foot pedal. The adjustment component allows medical staff, family members or patients with mild symptoms to adjust the position of the snap-fit ​​positioning rod in different snap-fit ​​grooves.

[0011] The structure of the aforementioned adjustment component is as follows: the adjustment component is a strap or a foot limiting plate made of rigid material. Both the strap and the foot limiting plate can fix the patient's foot and prevent the patient's foot from slipping. It is convenient for medical staff or family members to manually lift the adjustment component to adjust the position of the locking positioning rod in the locking groove. Moreover, for patients with mild symptoms, whose feet can move, the patient can lift their toes by themselves without the assistance of others.

[0012] The specific structure of the foot limiting plate is as follows: the foot limiting plate includes a horizontal bar and an arc-shaped plate. The horizontal bar is set horizontally and is detachably connected to the upper end of the locking positioning rod. The two ends of the arc-shaped plate are respectively connected to the two ends of the horizontal bar. The curvature of the arc-shaped plate is adapted to the human foot, making it easy for the foot to be placed between the arc-shaped plate and the horizontal bar, thus limiting the foot and also making it easier for patients with mild symptoms to adjust the position of the locking positioning rod themselves.

[0013] To facilitate locking the angle between the thigh support plate and the calf support plate in multiple positions, which is beneficial for better training of the patient's knee joint, the length of the base plate is greater than the sum of the lengths of the thigh support plate and the calf support plate, and the angle between the thigh support plate and the calf support plate can be a flat angle for easy storage.

[0014] The connection structure between the foot pedal and the base plate is as follows: the base plate has T-shaped grooves on both sides along its width direction, and the foot pedal has T-shaped sliding strips on both sides along the width direction of the base plate that are adapted to the T-shaped grooves. The T-shaped sliding strips slide in the T-shaped grooves.

[0015] To facilitate the fixation of the patient's legs and reduce slippage during training, straps are provided on both the thigh support plate and the calf support plate.

[0016] The beneficial effects of this utility model are as follows:

[0017] By setting up a base plate, thigh support plate, calf support plate and foot pedal that are hinged in sequence, the thigh support plate and calf support plate can form any suitable angle on the base plate for the patient to perform knee joint training. The angle formed by the thigh support plate and calf support plate is locked by the foot pedal with a locking unit, making it convenient for the patient to place their legs on the thigh support plate and calf support plate for rehabilitation training.

[0018] The adjustment method of the snap-fit ​​unit is relatively simple. It can make it easy for medical staff, patients or their families to adjust the position of the snap-fit ​​positioning rod on multiple snap-fit ​​slots to adjust the angle between the thigh support plate and the calf support plate. It can also make it easy for patients with mild symptoms to adjust the position of the snap-fit ​​positioning rod on the snap-fit ​​slot by themselves with their toes, without the help of others.

[0019] The elastic connector is a compression spring. Under normal conditions, it can press the locking positioning rod down into the locking groove. When the locking positioning rod is lifted, it can compress the compression spring, causing the locking positioning rod to move up and disengage from the locking groove. This makes it easier to move the position of the foot pedal on the base plate, thereby adjusting the angle between the thigh support plate and the calf support plate. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a structural diagram;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 3 This is a top view;

[0024] Figure 4 for Figure 3 A schematic diagram of the AA-direction cross-section structure;

[0025] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0026] Figure 6 Right view;

[0027] Figure 7 for Figure 6 Enlarged structural diagram at point C;

[0028] The components represented by the various reference numerals in the diagram are:

[0029] 1. Base plate; 11. Snap-fit ​​groove; 12. T-shaped slide groove; 2. Thigh support plate; 3. Lower leg support plate; 4. Foot pedal; 41. Through hole; 42. T-shaped slide bar; 5. Snap-fit ​​positioning rod; 6. Elastic connector; 7. Adjustable component; 71. Crossbar; 72. Curved plate; 8. Straps. Detailed Implementation

[0030] See Figure 1 , Figure 2 and Figure 3 As shown, a knee flexion and extension posture training device includes a base plate 1, a thigh support plate 2, a calf support plate 3, and a foot pedal 4, which are hinged sequentially. The base plate 1 is horizontally positioned at the bottom, while the thigh support plate 2, calf support plate 3, and foot pedal 4 are all located above the base plate 1. The base plate 1 has multiple locking grooves 11 along its length. The foot pedal 4 slides against the base plate 1 along its length, and the foot pedal 4 is engaged with the locking grooves 11 via locking units. (See also...) Figure 6 and Figure 7 As shown, the base plate 1 has T-shaped grooves 12 on both sides along its width direction, and the foot pedal 4 has T-shaped slide bars 42 that are adapted to the T-shaped grooves 12 on both sides along the width direction of the base plate 1. The T-shaped slide bars 42 are slidably connected in the T-shaped grooves 12.

[0031] In this embodiment, to facilitate locking the angle between the thigh support plate 2 and the calf support plate 3 in multiple positions, which is beneficial for better training of the patient's knee joint, the length of the base plate 1 is greater than the sum of the lengths of the thigh support plate 2 and the calf support plate 3, and the angle between the thigh support plate 2 and the calf support plate 3 can be a flat angle for easy storage.

[0032] Among them, see Figure 3 , Figure 4 and Figure 5 As shown, the snap-fit ​​unit includes a snap-fit ​​positioning rod 5, which passes vertically through the foot pedal 4 and is inserted into the snap-fit ​​groove 11. The snap-fit ​​positioning rod 5 is elastically connected to the foot pedal 4 via an elastic connector 6, and its position is adjustable in the vertical direction. A through hole 41 is provided on the foot pedal 4 in the vertical direction. The snap-fit ​​positioning rod 5 passes through the through hole 41. The elastic connector 6 is sleeved on the snap-fit ​​positioning rod 5 and located in the snap-fit ​​groove 11. One end of the elastic connector 6 is connected to the upper part of the through hole 41, and the other end is connected to the lower part of the snap-fit ​​positioning rod 5.

[0033] See Figure 5As shown, the elastic connector 6 is a compression spring. Under normal conditions, it can press the locking positioning rod 5 down into the locking groove 11. When the locking positioning rod 5 is lifted, it can compress the compression spring, causing the locking positioning rod 5 to move upward and disengage from the locking groove 11, which facilitates the movement of the foot pedal 4 on the base plate 1, thereby realizing the adjustment of the angle between the thigh support plate 2 and the calf support plate 3.

[0034] In this embodiment, the height of the snap-fit ​​positioning rod 5 is higher than the vertical distance from the bottom surface of the snap-fit ​​groove 11 to the upper surface of the foot pedal 4. The upper part of the snap-fit ​​positioning rod 5 is provided with an adjustment component 7 located above the foot pedal 4. The adjustment component 7 can be used by medical staff, family members or patients with mild symptoms to adjust the position of the snap-fit ​​positioning rod 5 in different snap-fit ​​grooves 11.

[0035] The structure of the aforementioned adjusting component 7 is as follows: the adjusting component 7 is a strap 8 or a foot limiting plate made of rigid material. Both the strap 8 and the foot limiting plate can fix the patient's foot and prevent the patient's foot from slipping. It is convenient for medical staff or family members to manually lift the adjusting component 7, thereby adjusting the position of the locking positioning rod 5 in the locking groove 11. For patients with mild symptoms who can move their feet, the patient can lift their toes to move the locking positioning rod 5 upward and away from the locking groove 11 without assistance from others, thereby adjusting the position of the locking positioning rod 5 on the base plate 1. By moving the toes downward and moving the foot pedal 4 back and forth on the base plate 1, the locking positioning rod 5 is re-locked into the locking groove 11 under the action of the elastic connecting component 6.

[0036] The aforementioned structure functions as follows: the base plate 1, located below, supports the thigh support plate 2, the calf support plate 3, and the foot pedal 4. The ends of the thigh support plate 2 and the calf support plate 3 are hinged together, allowing them to be adjusted to any angle on the base plate 1. For example, when the angle between the thigh support plate 2 and the calf support plate 3 is adjusted to 90° or other angles that are conducive to the patient's knee joint training, the foot pedal 4 is positioned on the locking groove 11 by the locking unit, thus fixing the angle of the thigh support plate 2 and the calf support plate 3. Placing the patient's leg on the thigh support plate 2 and the calf support plate 3 achieves the effect of knee joint rehabilitation training. By adjusting the position of the locking unit in the locking groove 11, the position of the foot pedal 4 on the base plate 1 can be adjusted, thereby adjusting the angle of the thigh support plate 2 and the calf support plate 3.

[0037] See Figure 6 and Figure 7As shown, for patients with mild symptoms, the adjusting component 7 can be a foot limiting plate. The foot limiting plate includes a horizontal bar 71 and an arc-shaped plate 72. The horizontal bar 71 is horizontally set and is detachably connected to the upper end of the locking positioning rod 5. The two ends of the arc-shaped plate 72 are respectively connected to the two ends of the horizontal bar 71. The curvature of the arc-shaped plate 72 is adapted to the human foot, making it easy for the foot to be placed between the arc-shaped plate 72 and the horizontal bar 71, thus limiting the foot. This is suitable for patients with mild symptoms to adjust the position of the locking positioning rod 5 themselves.

[0038] See Figure 1 In this embodiment, to facilitate the fixation of the patient's leg and reduce the slippage of the patient's leg during training, both the thigh support plate 2 and the calf support plate 3 are equipped with straps 8.

Claims

1. A knee flexion and extension posture training device, characterized in that, The device includes a base plate (1), a thigh support plate (2), a calf support plate (3), and a foot pedal (4) that are hinged together in sequence. The base plate (1) is horizontally positioned at the bottom. The thigh support plate (2), the calf support plate (3), and the foot pedal (4) are all located above the base plate (1). The base plate (1) has multiple snap-fit ​​grooves (11) along its length. The foot pedal (4) slides with the base plate (1) in the length direction of the base plate (1). The foot pedal (4) is snapped into the snap-fit ​​grooves (11) through snap-fit ​​units. The snap-fit ​​unit includes a snap-fit ​​positioning rod (5), which passes through the foot pedal (4) in the vertical direction and is inserted into the snap-fit ​​groove (11). The snap-fit ​​positioning rod (5) is elastically connected to the foot pedal (4) through an elastic connector (6), and its position in the vertical direction is adjustable.

2. The knee flexion and extension posture training device according to claim 1, characterized in that, The foot pedal (4) has a through hole (41) along the vertical direction. The snap-fit ​​positioning rod (5) passes through the through hole (41). The elastic connector (6) is sleeved on the snap-fit ​​positioning rod (5). One end of the elastic connector (6) is connected to the upper part of the through hole (41), and the other end is connected to the lower part of the snap-fit ​​positioning rod (5).

3. The knee flexion and extension posture training device according to claim 1, characterized in that, The height of the snap-fit ​​positioning rod (5) is higher than the vertical distance from the bottom surface of the snap-fit ​​groove (11) to the upper surface of the foot pedal (4), and the upper part of the snap-fit ​​positioning rod (5) is provided with an adjustment piece (7) located above the foot pedal (4).

4. The knee flexion and extension posture training device according to claim 3, characterized in that, The adjusting element (7) is a strap (8) or a foot limiting plate made of hard material.

5. The knee flexion and extension posture training device according to claim 4, characterized in that, The foot limiting plate includes a horizontal bar (71) and an arc plate (72). The horizontal bar (71) is horizontally set and is detachably connected to the upper end of the snap-fit ​​positioning rod (5). The two ends of the arc plate (72) are respectively connected to the two ends of the horizontal bar (71).

6. The knee flexion and extension posture training device according to claim 1, characterized in that, The length of the base plate (1) is greater than the sum of the lengths of the thigh support plate (2) and the calf support plate (3).

7. The knee flexion and extension posture training device according to claim 1, characterized in that, The base plate (1) has T-shaped grooves (12) on both sides along its width direction, and the foot pedal (4) has T-shaped slide bars (42) on both sides along the width direction of the base plate (1) that are adapted to the T-shaped grooves (12). The T-shaped slide bars (42) slide in the T-shaped grooves (12).

8. The knee flexion and extension posture training device according to claim 1, characterized in that, Both the thigh support plate (2) and the calf support plate (3) are equipped with straps (8).