Knee joint assisting and patella track orthopedic brace

Abstract

The utility model belongs to the technical field of rehabilitation instruments, and particularly relates to a knee joint assisting and patella track orthopedic brace which comprises an elastic leg sleeve, a lower framework and an upper framework are arranged at the upper end and the lower end of the rear side of the elastic leg sleeve respectively, and the lower framework and the upper framework are connected with patella fixing rings through elastic bands. A lower spherical hinge and an upper spherical hinge are installed on a lower connecting frame and an upper connecting frame arranged on the lower framework and the upper framework respectively, the upper spherical hinge and the lower spherical hinge are connected with the two ends of a nitrogen buffer, and a cylinder body of the nitrogen buffer is communicated with a gas storage cavity in the gas pressure regulator through a gas pipe. By arranging an upper spherical hinge and a lower spherical hinge, the nitrogen buffer can provide multi-track support for a user within a safe angle range, and the flexibility of knee joints of the user is guaranteed; an operator can adjust the internal pressure of the nitrogen buffer through the air pressure adjuster, and the supporting strength of the nitrogen buffer is conveniently changed by adjusting the internal pressure.

Description

Technical Field

[0001] The utility model belongs to the technical field of rehabilitation equipment, and in particular relates to a knee joint assist and patellar trajectory correction brace. Background Art

[0002] Wearable exoskeletons are generally hydraulically driven active exoskeletons. However, active exoskeletons usually have poor coordination with the soft human body. Therefore, wearable exoskeletons gradually adopt flexible power-assisted knee joint external brace designs to provide power to the human body without affecting the natural kinematics of the human body, allowing the lower limbs to maintain a natural gait when walking.

[0003] The utility model patent with authorization announcement number CN219375085U discloses a knee joint assist and patellar trajectory orthotic brace, including a velvet sleeve for being sleeved on the knee of the leg and arranged in a cylindrical shape. The front end of the velvet sleeve is provided with a patellar fixing ring structure, and the patellar fixing ring structure is tightened and positioned by an elastic tension belt assembly, and the rear end of the velvet sleeve is provided with a hydraulic rod support mechanism that can be rotated and telescopically adjusted, so that the direction of patellar movement can be freely adjusted, improving the patellar movement trajectory and force, thereby reducing the pressure on the patellar joint, and having a good use effect.

[0004] However, the above mechanism has the following problems: when the knee joint is flexed, the knee joint also has a certain axial rotation angle, and the movement trajectory of the hydraulic rod support mechanism in the above structure is single, resulting in restricted leg movement of the wearer; in addition, the support strength of the hydraulic rod support mechanism in the above mechanism cannot be adjusted, and therefore cannot provide appropriate support strength for wearers of different weights. Utility Model Content

[0005] In response to the above problems, the purpose of the present invention is to provide a knee joint assist and patellar trajectory correction brace to solve the problems of the existing knee joint assist and patellar trajectory correction brace, such as the single movement trajectory of the support mechanism, which restricts the wearer's leg movement; and the support strength of the support mechanism cannot be adjusted, resulting in poor adaptability.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a knee joint assist and patellar trajectory orthosis brace, comprising an elastic leg sleeve, wherein the upper and lower ends of the rear side of the elastic leg sleeve are respectively provided with a lower frame and an upper frame, the lower frame and the upper frame are both connected to one end of the elastic band, and the other end of the elastic band is connected to the patella fixing ring, the lower frame and the upper frame are respectively provided with a lower connecting frame and an upper connecting frame, the lower connecting frame and the upper connecting frame are respectively installed with a lower ball joint and an upper ball joint, the ball heads in the upper ball joint and the lower ball joint are respectively connected to the two ends of the nitrogen buffer, the cylinder body of the nitrogen buffer is connected to the air storage chamber in the air pressure regulator through an air pipe, the air pressure regulator comprises a cylinder body, a piston is slidably installed on the inner side of the cylinder body, one end of the piston is connected to a screw, and an air storage chamber is formed between the other end of the piston and the cylinder body, the screw is threadedly connected with a nut, the nut is mounted on a rotating seat, the rotating seat is rotatably clamped on a clamping seat, and the clamping seat is mounted on the cylinder body.

[0007] The beneficial effects of the present invention are as follows: the arrangement of the upper ball joint and the lower ball joint enables the nitrogen buffer to provide multi-track support for the user within a safe angle range, thereby ensuring the flexibility of the user's knee joint; the operator can adjust the internal pressure of the nitrogen buffer through the air pressure regulator, thereby conveniently changing the support strength of the nitrogen buffer by adjusting the internal pressure.

[0008] In order to fully ensure the safety of the use of nitrogen buffer;

[0009] As a further improvement of the above technical solution: when the elastic leg sleeve is rotated to an angle of 170 degrees with the patellar fixing ring as the corner point in the direction away from the lower frame and the upper frame, the length of the nitrogen buffer does not exceed the working stroke.

[0010] The beneficial effect of this improvement is that the knee joint angle can be hyperextended by about 10 degrees on the basis of 0 degrees. This device can ensure the safe use of the nitrogen buffer under the condition of hyperextension of the knee joint, and prevent the nitrogen buffer from being damaged by being driven beyond the maximum working stroke due to the movement of the leg.

[0011] In order to make the nitrogen buffer stably expand and contract under the support of the upper and lower ball joints;

[0012] As a further improvement of the above technical solution: the ball joint seats in the upper ball joint and the lower ball joint are respectively installed on the upper connecting frame and the lower connecting frame, and the piston rod and cylinder body of the nitrogen buffer are respectively threadedly connected to the ball heads in the upper ball joint and the lower ball joint.

[0013] The beneficial effect of this improvement is that the upper ball joint and the lower ball joint provide reliable support for the nitrogen buffer, allowing the nitrogen buffer to stably expand and contract in multiple directions, thereby preventing the nitrogen buffer from being damaged by radial forces.

[0014] In order to ensure the stability of nut installation;

[0015] As a further improvement of the above technical solution: the cross-section of the clamping seat in the axial direction is a T-shaped structure.

[0016] The beneficial effect of this improvement is that the clamping seat can stably clamp the rotating seat, ensuring the stability of the nut position while ensuring the smooth rotation of the rotating seat and the nut.

[0017] In order to make the screw move stably in a straight line driven by the nut;

[0018] As a further improvement of the above technical solution: a limiting block is provided on the inner wall of the clamping seat, a limiting groove is provided through the side surface of the screw, and the limiting block is slidably inserted into the limiting groove.

[0019] The beneficial effect of this improvement is that the limiting groove and the limiting block cooperate to play a limiting role, preventing the screw from rotating, thereby allowing the screw to move stably in a straight line when the nut rotates.

[0020] In order to ensure the sealing of the air storage chamber;

[0021] As a further improvement of the above technical solution: the edge of the piston is provided with a dynamic sealing structure which is an interference fit with the inner wall of the cylinder body.

[0022] The beneficial effect of this improvement is that the dynamic sealing structure provided on the piston can effectively ensure the sealing of the air storage chamber.

[0023] In order to fully improve the comfort of the device support;

[0024] As a further improvement of the above technical solution: the lower frame and the upper frame are both U-shaped plate structures.

[0025] The beneficial effect of this improvement is that the lower frame and the upper frame can effectively increase the force-bearing area when the nitrogen buffer supports the user's legs, thereby improving the comfort of using the device.

[0026] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the present utility model;

[0028] Figure 2 This is a schematic structural diagram of the gas pressure regulator in the utility model;

[0029] Figure 3 This is a cross-sectional structural diagram of the gas pressure regulator in the present utility model;

[0030] In the figure: 1. Elastic leg sleeve; 2. Lower frame; 3. Upper frame; 4. Elastic band; 5. Patellar fixation ring; 6. Upper connecting frame; 7. Lower connecting frame; 8. Upper ball joint; 9. Lower ball joint; 10. Nitrogen buffer; 11. Air pipe; 12. Air pressure regulator; 121. Cylinder body; 122. Piston; 123. Screw; 124. Limiting groove; 125. Air storage chamber; 126. Snap-fit seat; 127. Limiting block; 128. Rotating seat; 129. Nut. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0032] Example 1:

[0033] like Figure 1—3 shows: a knee joint assist and patellar trajectory orthosis brace, comprising an elastic leg sleeve 1, wherein the upper and lower ends of the rear side of the elastic leg sleeve 1 are respectively provided with a lower frame 2 and an upper frame 3, wherein the lower frame 2 and the upper frame 3 are both connected to one end of an elastic band 4, and the other end of the elastic band 4 is connected to a patellar fixing ring 5, wherein the lower frame 2 and the upper frame 3 are respectively provided with a lower connecting frame 7 and an upper connecting frame 6, wherein the lower connecting frame 7 and the upper connecting frame 6 are respectively installed with a lower ball joint 9 and an upper ball joint 8, wherein the ball heads in the upper ball joint 8 and the lower ball joint 9 are respectively connected to the two ends of a nitrogen buffer 10, and the cylinder of the nitrogen buffer 10 is connected to the gas storage in the air pressure regulator 12 through an air pipe 11 Cavity 125, the air pressure regulator 12 includes a cylinder 121, a piston 122 is slidably mounted on the inner side of the cylinder 121, one end of the piston 122 is connected to a screw 123, and an air storage chamber 125 is formed between the other end of the piston 122 and the cylinder 121, the screw 123 is threadedly connected to a nut 129, the nut 129 is mounted on a rotating seat 128, the rotating seat 128 is rotatably mounted on a clamping seat 126, and the clamping seat 126 is mounted on the cylinder 121. The arrangement of the upper ball joint 8 and the lower ball joint 9 enables the nitrogen buffer 10 to provide multi-track support for the user within a safe angle range, thereby ensuring the flexibility of the user's knee joint;The operator can adjust the internal pressure of the nitrogen buffer 10 through the air pressure regulator 12, and the supporting strength of the nitrogen buffer 10 can be conveniently changed by adjusting the internal pressure. When the elastic leg sleeve 1 is rotated to an angle of 170 degrees with the patellar fixing ring 5 as the corner point in the direction away from the lower skeleton 2 and the upper skeleton 3, the length of the nitrogen buffer 10 does not exceed the working stroke, and the knee joint angle can be overextended by about 10 degrees on the basis of 0 degrees. This device can ensure the safe use of the nitrogen buffer 10 in the case of hyperextension of the knee joint, and prevent the nitrogen buffer 10 from being damaged by the movement of the leg and exceeding the maximum working stroke. The ball joint seats in the upper ball joint 8 and the lower ball joint 9 are respectively installed on the upper connecting frame 6 and the lower connecting frame 7. The piston rod and the cylinder body of the nitrogen buffer 10 are respectively threadedly connected to the ball heads in the upper ball joint 8 and the lower ball joint 9. The upper ball joint 8 and the lower ball joint 9 provide reliable support for the nitrogen buffer 10, so that the nitrogen buffer 10 can be stably extended and retracted in multiple directions, and the nitrogen buffer 10 is prevented from being damaged by radial forces. The cross section of the axial direction of the clamping seat 126 is a T-shaped structure. The clamping seat 126 can stably clamp the rotating seat 128. Under the premise of ensuring the smooth rotation of the rotating seat 128 and the nut 129, the stability of the position of the nut 129 is ensured. The inner wall of the clamping seat 126 is provided with a limiting block 127. The side of the screw 123 is provided with a limiting groove 124. The limiting block 127 is slidably inserted in the limiting groove 124. The limiting groove 124 and the limiting block 127 cooperate to play a limiting role, avoiding the screw The rod 123 rotates, causing the screw 123 to move steadily in a straight line when the nut 129 rotates. The edge of the piston 122 is provided with a dynamic seal structure that forms an interference fit with the inner wall of the cylinder 121. This dynamic seal structure provided on the piston 122 effectively ensures the sealing of the air storage chamber 125. The lower frame 2 and the upper frame 3 are both U-shaped plate structures. The lower frame 2 and the upper frame 3 effectively increase the force-bearing area of the nitrogen buffer 10 when supporting the user's legs, thereby improving the comfort of the device.

[0034] The working principle of this technical solution is as follows: the user wears the elastic leg sleeve 1 on the leg, and positions the lower frame 2 and the upper frame 3 on the posterior side of the calf and the posterior side of the thigh, respectively. The user pulls and adjusts the position of the patellar fixing ring 5 so that the patellar fixing ring 5 adjusts the outer side of the patella. When the leg is bent, the distance between the upper frame 3 and the elastic band 4 decreases, and the nitrogen buffer 10 contracts. The piston rod moves toward the cylinder body, and the resistance of the gas passing through the overflow port in the prior art is used to achieve cushioning assistance for the knee joint. When the support strength of the nitrogen buffer 10 needs to be adjusted, the operator rotates the nut 129 to make the screw 123 move linearly under the limit of the limit block 127 and the limit groove 124, thereby driving the piston 122 to move inside the cylinder body 121, thereby adjusting the volume of the gas storage chamber 125, thereby changing the internal pressure of the gas storage chamber 125 and the nitrogen buffer 10. By adjusting the internal pressure of the nitrogen buffer 10, the support strength of the nitrogen buffer 10 is changed.

[0035] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A knee joint assist and patellar tracking orthosis brace, characterized by: The invention comprises an elastic leg sleeve (1), wherein the upper and lower ends of the rear side of the elastic leg sleeve (1) are respectively provided with a lower frame (2) and an upper frame (3), wherein the lower frame (2) and the upper frame (3) are both connected to one end of an elastic band (4), and the other end of the elastic band (4) is connected to a patella fixing ring (5), and the lower frame (2) and the upper frame (3) are respectively provided with a lower connecting frame (7) and an upper connecting frame (6), and the lower connecting frame (7) and the upper connecting frame (6) are respectively installed with a lower ball joint (9) and an upper ball joint (8), and the ball heads in the upper ball joint (8) and the lower ball joint (9) are respectively connected to the two ends of a nitrogen buffer (10), and the cylinder of the nitrogen buffer (10) is connected to the nitrogen buffer (10) by a plurality of screws. The air pipe (11) is connected to the air storage chamber (125) in the air pressure regulator (12). The air pressure regulator (12) includes a cylinder (121). A piston (122) is slidably mounted on the inner side of the cylinder (121). One end of the piston (122) is connected to a screw rod (123). An air storage chamber (125) is formed between the other end of the piston (122) and the cylinder (121). The screw rod (123) is threadedly connected to a nut (129). The nut (129) is mounted on a rotating seat (128). The rotating seat (128) is rotatably mounted on a clamping seat (126). The clamping seat (126) is mounted on the cylinder (121).

2. The knee joint assist and patellar tracking orthosis brace according to claim 1, characterized in that: When the elastic leg sleeve (1) is rotated to an angle of 170 degrees with the patella fixing ring (5) as a corner point in a direction away from the lower frame (2) and the upper frame (3), the length of the nitrogen buffer (10) does not exceed the working stroke.

3. The knee joint assist and patellar tracking orthosis brace according to claim 1, characterized in that: The ball joint seats in the upper ball joint (8) and the lower ball joint (9) are respectively mounted on the upper connecting frame (6) and the lower connecting frame (7), and the piston rod and the cylinder body of the nitrogen buffer (10) are respectively threadedly connected to the ball heads in the upper ball joint (8) and the lower ball joint (9).

4. The knee joint assist and patellar tracking orthosis brace according to claim 1, characterized in that: The cross section of the clamping seat (126) in the axial direction is a T-shaped structure.

5. The knee joint assist and patellar tracking orthosis brace according to claim 1, characterized in that: A limiting block (127) is provided on the inner wall of the clamping seat (126), a limiting groove (124) is provided through the side surface of the screw rod (123), and the limiting block (127) is slidably inserted into the limiting groove (124).

6. The knee joint assist and patellar tracking orthosis brace according to claim 1, characterized in that: The edge of the piston (122) is provided with a dynamic sealing structure that is interference-fitted with the inner wall of the cylinder body (121).

7. The knee joint assist and patellar tracking orthosis brace according to claim 1, characterized in that: The lower frame (2) and the upper frame (3) are both U-shaped plate structures.

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