Knee extension exercise assist device

Abstract

This application discloses a knee extension exercise assistive device, comprising: a base unit and a pressure unit; the base unit includes a flat base body, with a thigh support pad formed on the upper side of its first end and a calf support pad formed on the upper side of its second end; a through-hole extending in the vertical direction is formed at the middle position of the front part of the base unit; a threaded hole extending in the front-rear direction is formed on the front side of the front part of the base unit; the threaded hole communicates with the through-hole; a bolt is installed in the threaded hole; the pressure unit includes: a knee pressure plate and a connecting rod; a recessed portion corresponding to the knee is formed on the lower side of the knee pressure plate, and the knee pressure plate is used to press on the knee of the subject from above; the upper part of the connecting rod is curved, and the lower part is vertical; the upper part of the connecting rod is fixed together with the upper part of the knee pressure plate; the lower part of the connecting rod is inserted into the through-hole of the base body; the end of the bolt in the threaded hole of the base body abuts against the outer surface of the lower part of the connecting rod.

Description

Technical Field

[0001] This application relates to an assistive device after orthopedic surgery, and more particularly to an assistive device for knee extension exercises. Background Technology

[0002] Patients with genu varum (also known as bowlegs) often undergo osteotomy to improve lower limb alignment. Postoperative knee joint function recovery faces multiple challenges. Because genu varum itself involves knee flexion, prolonged knee flexion can cause cartilage wear. Therefore, these patients need to perform knee extension exercises or training after surgery. During these exercises, the knee joint needs to remain in an extended position for a prolonged period to prevent abnormal cartilage wear caused by joint flexion and to avoid affecting the healing of the osteotomy site. Traditional methods for performing knee extension exercises include salt bag compression. However, with this method, the salt bag placed on the knee is prone to shifting or slipping off once the patient moves, failing to provide sustained effective pressure. Moreover, patients need to adjust their position while bedridden, and the salt bag is difficult to maintain continuous pressure in other lying positions. Utility Model Content

[0003] In view of the above problems, this application aims to provide a knee extension exercise assistive device that can help the knee joint to perform extension exercises without the aid of gravity, and allows the patient to make appropriate adjustments to their body position during exercise.

[0004] The knee extension exercise assistive device of this application includes: a base unit and a pressure unit;

[0005] The base unit includes a flat base body. A thigh support pad is formed on the upper side of the first end of the base body for supporting the lower side of the subject's thigh. A calf support pad is formed on the upper side of the second end of the base body for supporting the lower side of the subject's calf. A through-hole extending in the vertical direction is formed at the middle position of the front part of the base unit. A threaded hole extending in the front-back direction is formed on the front side of the front part of the base unit. The threaded hole communicates with the through-hole. A bolt is installed in the threaded hole.

[0006] The pressure unit includes a knee pressure assembly and a connecting rod. The pressure assembly includes a knee pressure plate with a recessed portion corresponding to the knee on its lower side. The knee pressure plate is used to press on the subject's knee from above to apply pressure to the subject's knee. The upper part of the connecting rod is curved, and the lower part is vertical. The upper part of the connecting rod is fixed to the upper part of the knee pressure plate. The lower part of the connecting rod is inserted into a through-hole in the base body. The end of a bolt in the threaded hole of the base body abuts against the outer surface of the lower part of the connecting rod, thereby fixing the connecting rod in the base unit.

[0007] A vertically extending guide bar is formed on the upper side of the knee pressure plate;

[0008] The upper end of the connecting rod is formed with a mounting block, which is parallel to the base body; the middle of the mounting block is formed with a through mounting hole; the upper part of the guide rod of the knee pressure plate can be slidably inserted into the mounting hole, and the upper end of the guide rod extends above the mounting block.

[0009] A solenoid spring is installed around the guide rod of the knee pressure plate. The lower end of the spring is supported on the upper side of the knee pressure plate, and the upper end of the spring is supported on the lower side of the mounting block.

[0010] Preferably, a silicone pad is provided on the underside of the knee pressure plate.

[0011] Preferably, a stop block is formed at the upper end of the guide rod surrounding the knee pressure plate.

[0012] Preferably, a first recess is formed in the middle of the thigh support pad, and the first recess is used to support the circumference of the subject's thigh.

[0013] A second recess is formed in the middle of the calf support pad, which is used to support the circumference of the subject's calf.

[0014] Preferably, length markings are provided on the outer circumference of the guide rod along its longitudinal direction to measure the degree of spring compression.

[0015] The knee extension exercise assistive device of this application applies pressure to the upper side of the knee via a knee pressure plate and provides support to the lower side of the leg via a base body, thereby assisting the subject in knee extension exercises. By clamping and fixing the device to the subject's knee joint on both the upper and lower sides, the subject can also perform appropriate movements during knee extension exercises. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the knee extension exercise assistive device of this application.

[0017] Figure 2 This is a three-dimensional structural diagram of the base unit of the knee extension exercise assistive device of this application.

[0018] Figure 3 This is a side view of the pressure unit of the knee extension exercise assistive device of this application.

[0019] Figure 4 for Figure 3 A three-dimensional structural diagram of the connecting rod of the pressure unit.

[0020] Figure 5 for Figure 3 A side view of the knee compression assembly of the pressure unit. Detailed Implementation

[0021] The knee extension exercise assistive device of this application will be described in detail below with reference to the accompanying drawings.

[0022] The knee extension exercise assistive device of this application includes: a base unit 10 and a pressure unit 20.

[0023] The base unit 10 includes a flat base body 11. A thigh support pad 12 is formed on the upper side of the first end of the base body 11 for supporting the lower side of the subject's thigh. A calf support pad 13 is formed on the upper side of the second end of the base body 11 for supporting the lower side of the subject's calf. A through-hole 11a extending in the vertical direction is formed at the middle position of the front part of the base unit 10. A threaded hole 11b extending in the front-back direction is formed on the front side of the front part of the base unit 10. The threaded hole 11b communicates with the through-hole 11a. A bolt is installed in the threaded hole 11b.

[0024] The pressure unit 20 includes a knee pressure plate application assembly and a connecting rod 21. The knee pressure plate 22 in the knee pressure assembly has a recessed portion corresponding to the knee on its lower side. The knee pressure plate 22 is used to press on the subject's knee from above and apply pressure to the subject's knee. The upper part of the connecting rod 21 is curved, and the lower part 21a is vertical. The upper part of the connecting rod 21 is fixed together with the upper part of the knee pressure plate 22. The lower part 21a of the connecting rod 21 is inserted into the through hole 11a of the base body 11. The end of the bolt in the threaded hole 11b of the base body 11 abuts against the outer surface of the lower part 21a of the connecting rod 21, thereby fixing the connecting rod 21 in the base unit 10.

[0025] A silicone pad 25 is provided on the underside of the knee pressure plate 22 to increase the comfort of the subject.

[0026] A vertically extending guide rod 23 is formed on the upper side of the knee pressure plate 22.

[0027] The upper end of the connecting rod 21 has a mounting block 21b, which is parallel to the base body 11. The middle part of the mounting block 21b has a through mounting hole 21c. The upper part of the guide rod 23 of the knee pressure plate 22 can be slidably inserted into the mounting hole 21c, and the upper end of the guide rod 23 extends above the mounting block 21b.

[0028] A solenoid spring 24 is provided around the guide rod 23 of the knee pressure plate 22. The lower end of the spring 24 is supported on the upper side of the knee pressure plate 22, and the upper end of the spring 24 is supported on the lower side of the mounting block 21b.

[0029] A stop block 23a is formed at the upper end of the guide rod 23 surrounding the knee pressure plate 22.

[0030] The thigh support pad 12 has a first recess 12a formed in the middle, which is used to support the circumference of the subject's thigh. The calf support pad 13 has a second recess 13a formed in the middle, which is used to support the circumference of the subject's calf.

[0031] Along the longitudinal direction of the guide rod 23, length markings are provided on the outer circumference of the guide rod to measure the degree of spring compression.

[0032] In use, the base body is supported under the subject's knee, with the thigh support pad resting on the upper side of the lower thigh and the calf support pad resting on the lower side of the upper calf. The lower part of the connecting rod of the pressure unit is then inserted into the through-hole, and the knee pressure component is positioned above the subject's knee. The operator presses down on the pressure unit by pressing the upper part of the connecting rod. This compresses the spring, and the pressure on the spring is the pressure on the subject's knee. The spring pressure is indicated by length markings on the guide rod; for example, each mark represents 100 grams of spring pressure. When the pressure reaches the desired value, such as 1000 grams, the lower part is secured with bolts. After the operator removes their hand from the connecting rod, it will not be pulled out of the through-hole due to the bolts. The elastic force exerted by the spring on the knee pressure plate is transmitted to the patient's knee joint, achieving the purpose of knee extension exercise. Because the entire device is clamped onto the patient's knee joint, the device will not fall off even if the patient makes some appropriate movements in bed, such as turning over or lying on their side, allowing knee extension exercises to continue.

Claims

1. A knee straightening exercise assist device, characterized by include: Base unit, pressure unit; The base unit includes a flat base body. A thigh support pad is formed on the upper side of the first end of the base body for supporting the lower side of the subject's thigh. A calf support pad is formed on the upper side of the second end of the base body for supporting the lower side of the subject's calf. A through-hole extending in the vertical direction is formed at the middle position of the front part of the base unit. A threaded hole extending in the front-back direction is formed on the front side of the front part of the base unit. The threaded hole communicates with the through-hole. A bolt is installed in the threaded hole. The pressure unit includes: a knee pressure assembly and a connecting rod; the left knee pressure assembly includes a knee pressure plate; the lower side of the knee pressure plate has a recess corresponding to the knee, and the knee pressure plate is used to press on the subject's knee from above to apply pressure to the subject's knee; the upper part of the connecting rod is curved, and the lower part is vertical; the upper part of the connecting rod is fixed together with the upper part of the knee pressure plate; the lower part of the connecting rod is inserted into a through-hole in the base body; the end of the bolt in the threaded hole of the base body abuts against the outer surface of the lower part of the connecting rod, thereby fixing the connecting rod in the base unit; A vertically extending guide bar is formed on the upper side of the knee pressure plate; The upper end of the connecting rod is formed with a mounting block, which is parallel to the base body; the middle of the mounting block is formed with a through mounting hole; the upper part of the guide rod of the knee pressure plate can be slidably inserted into the mounting hole, and the upper end of the guide rod extends above the mounting block. A solenoid spring is installed around the guide rod of the knee pressure plate. The lower end of the spring is supported on the upper side of the knee pressure plate, and the upper end of the spring is supported on the lower side of the mounting block.

2. The knee extension exercise assistive device according to claim 1, characterized in that: A silicone pad is provided on the underside of the knee pressure plate.

3. The knee extension exercise assistive device according to claim 1, characterized in that: A stop block is formed at the upper end of the guide rod surrounding the knee pressure plate.

4. The knee extension exercise assistive device according to claim 1, characterized in that: A first recess is formed in the middle of the thigh support pad, which is used to support the circumference of the subject's thigh. A second recess is formed in the middle of the calf support pad, which is used to support the circumference of the subject's calf.

5. The knee extension exercise assistive device according to claim 1, characterized in that: Along the longitudinal direction of the guide rod, length markings are provided on the outer circumference of the guide rod to measure the degree of spring compression.

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