CN117679229A - High polymer material knee joint support of adjustable holding power - Google Patents

Abstract

The invention relates to the field of knee joint protection, and discloses a high polymer material knee joint support with adjustable supporting force, which comprises two groups of exoskeleton protection mechanisms connected in a hinged mode, wherein the exoskeleton protection mechanisms comprise mounting rings, hoop plates are arranged at the end parts of the mounting rings in a hinged mode, two hoop plates are arranged in an array mode along the circumferential direction of the mounting rings, binding belts are arranged between the two hoop plates, connecting members are arranged on the outer circle surface of the mounting rings, the connecting members are arranged in two groups of connecting members in an array mode along the circumferential direction of the mounting rings, the connecting members comprise side frames connected with the mounting rings, connecting seats are arranged on the side frames through connecting pieces, the connecting seats are arranged on one sides of the mounting rings, which are away from the hoop plates, hinge shafts formed at the hinge joints are hinged, and adjusting parts used for adjusting positions of the rotating shafts are arranged between the side frames and the connecting seats.

Description

A polymer material knee joint brace with adjustable support force

Technical field

The invention relates to the field of knee joint protection, and in particular to a polymer material knee joint support with adjustable support force.

Background technique

Knee joint fixation brackets will be used during knee joint treatment to provide auxiliary support to the knee joint to be recovered, reduce the pressure on the knee joint, and ensure rapid recovery of the knee joint.

After searching, we found a Chinese invention patent application with publication number CN112245081A, which discloses a knee joint fixed bracket, including a thigh mechanism and a calf mechanism. The thigh mechanism and the calf mechanism are hinged, and the screw sleeve on the cylinder can be rotated. While the injured knee joint opens a certain gap and is fixed, the muscles of the corresponding leg are tightened through the leg cuffs that produce axial movement relative to the push rod to ensure that the person who is equipped with the present invention is able to go down the stairs or is accidentally pushed. The leg where the injured knee joint is located will not be subjected to a large compressive force due to the empty foot, and the injured knee joint will be protected from secondary damage. At the same time, it is ensured that the present invention can be effectively and continuously fixed on the leg, and continue to effectively exert its effect. In addition to supporting the injured knee joint, the compression amount of the adjustment spring B can be adjusted by turning the rotating cap. In this way, the size of the spring can be adjusted by reducing the compression amount of the spring according to the recovery status of the knee joint. , which causes the knee joint to gradually bear a certain amount of pressure and helps the knee joint to recover quickly. However, it has some shortcomings: 1. The center of the knee joint of each person is different. Although it can realize the adjustment of the calf mechanism and thigh mechanism, The center of the hinge point coincides with the center of the knee joint, but the adjustment method is simply by changing the position of the leg cuff. It is only a simple rough adjustment and cannot achieve precise fine adjustment. In other words, the adjustment result is not accurate enough; 2 It is difficult for the patient himself to know the rehabilitation status of the knee joint without detailed follow-up consultation. So if the patient adjusts the compression amount of the spring, it is good that the compression amount decreases to a small extent, and it will not cause any harm to the knee joint. If the amount of compression is reduced too much, the force on the knee joint when the patient walks is much greater than what the patient can actually recover from. As a result, the knee joint is prone to secondary injuries.

Based on the above, the present invention proposes a knee joint brace made of polymer material with adjustable support force.

Contents of the invention

In order to solve the problems mentioned in the above background, the present invention provides a polymer material knee joint support with adjustable support force.

In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

A polymer material knee joint support with adjustable support force includes two sets of hingedly connected exoskeleton protection mechanisms. The exoskeleton protection mechanism includes a mounting ring. The end of the mounting ring is hingedly provided with a hoop plate. The hoop plate is installed along the edge of the mounting ring. There are two arrays arranged in the circumferential direction, a strap is arranged between the two hoop plates, a connecting member is arranged on the outer circumferential surface of the mounting ring, and two groups of connecting members are arranged along the circumferential direction array of the mounting ring;

The connecting member includes a side frame connected to the mounting ring. A connecting seat is installed on the side frame through a connecting piece. The connecting seat is located on the side of the mounting ring away from the hoop plate. The connecting seats in the two sets of exoskeleton protection mechanisms are hingedly connected and articulated. The hinged axis formed at the point is named the rotating axis, and an adjusting component for adjusting the position of the rotating axis is provided between the side frame and the connecting seat.

As further improvements and optimizations of the present invention.

The connecting piece includes a slide rail arranged on the side frame and perpendicular to the axis center line of the mounting ring. A movable seat is installed on the slide rail. A sliding sleeve extending parallel to the axis center line of the mounting ring is extended on the movable seat. The sliding sleeve has an inner sleeve. The end of the sliding rod is connected to the connecting seat.

As further improvements and optimizations of the present invention.

The adjustment component includes two sets of adjustment units, and the two sets of adjustment units are respectively located on both sides of the connecting seat along the axis center line of the installation ring.

As further improvements and optimizations of the present invention.

The adjustment unit includes a sliding seat that is slidably mounted on the side frame along the axis of the mounting ring. A connecting rod assembly is hingedly provided between the sliding seat and the connecting seat.

As further improvements and optimizations of the present invention.

A screw rod and a knob are installed on the side frame. The screw rod is parallel to the axis line of the installation ring. The knob is dynamically connected to the screw rod, and the slide seat is connected to the screw rod.

As further improvements and optimizations of the present invention.

The connecting rod assembly includes a sleeve column. The closed end of the sleeve column is hinged with the sliding seat, and the open end is provided with an end cover. One side of the sleeve column is provided with side groove one, and the other side is provided with side groove two. The bottom of the side groove one is provided. There are connecting holes one and two. The bottom of the side groove two is provided with connecting holes three and four. The connecting holes one and three are close to the open end of the sleeve column, and the connecting holes two and four are close to the sleeve. The closed end of the column.

As further improvements and optimizations of the present invention.

The two side walls of the side groove along the groove width direction are each provided with an arc groove. The two arc grooves are coaxial and the area between the two arc grooves forms a middle hole in the shape of a complete cylindrical hole;

A sealing plate is provided at the notch of side groove one, and a valve core is set in the middle hole. A valve hole is opened through the outer circumferential surface of the valve core in the radial direction. A valve stem extends from the end of the valve core and the valve stem extends The end extends to the outside world. Initially, the valve hole and the side groove are not connected;

A sealing plate 2 is provided at the notch of the side groove 2, and an elastic piece is provided at the bottom of the side groove 2. One end of the elastic piece is fixed to the bottom of the side groove 2, and the other end crosses the connecting hole 3. The elastic piece makes the sleeve The fluid in the column flows unidirectionally through the connecting hole three toward the side groove two.

As further improvements and optimizations of the present invention.

A fixed column extends from the end face of the end cap. The fixed column is located in the sleeve column and forms a sealing fit between the two. The outer circular surface of the fixed column is provided with a connecting groove running through it along the direction of the axis. There are two connecting grooves and they are connected with each other respectively. Connection hole one and connection hole three are connected. A piston is set inside the sleeve column. A piston rod extends from the end of the piston. A support is provided after the end of the piston rod passes through the avoidance hole provided on the fixed column and the end cover. The seat and the connecting seat are hinged, and a spring is provided between the piston and the closed end of the sleeve column. Initially, the elastic force of the spring makes the piston and the fixed column fit;

The connecting rod assembly is provided with hydraulic medium.

Compared with the prior art, the beneficial effects of the present invention are:

This solution uses two sets of exoskeleton protection mechanisms to protect the patient's knee joint and reduce the patient's pain when walking. On this basis:

1. This solution is to coarsely adjust first and then finely adjust, so as to make the rotation axis coincide with the center of the knee joint as much as possible. The rotation axis is equivalent to the "center of the hinge point of the calf mechanism and the thigh mechanism" recorded in the patent document mentioned in the background art. ";

2. During the recovery period, in order to facilitate the recovery of the knee joint, the knee joint needs to be subject to a certain amount of pressure regularly according to the recovery status. In this plan:

1. When the leg with the knee joint is standing on the ground and bearing the weight of the human body, the moving speed of the piston depends on the flow rate of the hydraulic medium in side groove one, and the flow rate in side groove one depends on the relationship between side groove one and side groove one. The communication area between the valve holes, that is to say, at the beginning, the communication area between the valve hole and the side groove can be made small, and then the patient stands up and gradually shifts the body's center of gravity to the injured leg, so that the injured leg The legs gradually bear the weight of the body. During this process, due to the small connection area, the flow of hydraulic medium is slow, and the movement of the piston is also slow. Therefore, the pressure transferred to the knee joint also increases at a relatively slow speed. When you feel discomfort in your knee joint and cannot withstand more pressure, move your body's center of gravity away from the injured leg. Since the hydraulic medium in the connecting groove has two ways to return to the sleeve column, the spring will quickly release its elastic force and reset the connecting rod assembly. , the pressure on the knee joint is transferred away in time. During this process, when the patient feels discomfort in the knee joint, the moving distance of the piston can be observed to adjust the communication area between the valve hole and side groove 1, and then the patient can Walk around at a normal speed to put appropriate pressure on the knee joint and promote knee joint recovery;

2. In this plan, when the communication area between the valve hole and side groove 1 is fixed, the faster the patient walks, the smaller the moving distance of the piston is. In other words, the faster the patient walks, the faster the knee moves. The smaller the pressure on the joint, based on this, when the patient performs targeted rehabilitation training on the knee joint, the patient can adjust the pressure on the knee joint according to the walking speed to improve the effect of targeted rehabilitation training on the knee joint.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a schematic diagram of the exoskeleton protection mechanism;

Figure 3 is a schematic diagram of the installation ring and hoop plate;

Figure 4 is a schematic diagram of the connecting components;

Figure 5 is a schematic diagram of the adjustment components;

Figure 6 is an exploded view of the connecting rod assembly;

Figure 7 is a schematic diagram of sealing plate 1 and valve core;

Figure 8 is a cross-sectional view of the connecting rod assembly;

Figure 9 is a cross-sectional view of the sleeve column.

The numbers in the attached drawing are:

100. Exoskeleton protection mechanism; 101. Installation ring; 102. Hoop plate; 103. Connecting member; 104. Side frame; 105. Connecting seat; 106. Connecting piece; 107. Screw; 108. Slide seat; 109. Knob ; 110. Connecting rod assembly; 111. Bushing column; 1111. Side slot one; 1112. Middle hole; 1113. Connection hole one; 1114. Connection hole two; 1115. Side slot two; 1116. Connection hole three; 1117. Connection Hole four; 112, sealing plate one; 113, valve core; 1131, valve hole; 114, sealing plate two; 115, elastic piece; 116, end cap; 117, fixed column; 118, connecting groove; 119, piston; 120 , piston rod; 121, support; 122, spring.

Detailed ways

In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended inventive purpose, the specific implementation manner, structure, features and effects of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments.

In this solution, the polymer knee joint bracket refers to the knee joint bracket made of polymer materials. The manufacturing of knee joints is not the core of this solution. In addition, polymer materials are existing technologies, so they will not be described in detail.

Embodiment 1

Referring to Figure 1, a knee joint brace made of polymer material with adjustable support force includes two sets of hingedly connected exoskeleton protection mechanisms 100, one set is used to connect to the patient's thigh, and the other set is used to connect to the patient's calf.

Referring to Figures 2 and 3, the exoskeleton protection mechanism 100 includes a mounting ring 101. The end of the mounting ring 101 is hingedly provided with a hoop plate 102. Two hoop plates 102 are arranged in an array along the circumferential direction of the mounting ring 101. The two hoop plates There are straps between 102. The straps are not shown in the figure. When used, the patient's legs are positioned in the installation ring 101, similar to the action of putting on clothes. Then the exoskeleton protection mechanism 100 can be tightened to the patient through the straps. legs.

The outer circumferential surface of the mounting ring 101 is provided with connecting members 103. Two groups of connecting members 103 are arranged in an array along the circumferential direction of the mounting ring 101. Preferably, the two groups of connecting members 103 are located on the same side as the two hoop plates 102. The meaning of When in use, the two sets of connecting members 103 and the two hoop plates 102 can be located on both sides of the leg respectively. In this way, the knee joint can be exposed, so that the doctor can check the rehabilitation status of the knee joint during follow-up visits.

Referring to Figure 4, the connecting member 103 includes a side frame 104 connected to the mounting ring 101. A connecting seat 105 is installed on the side frame 104 through a connector 106. Specifically, the connecting seat 105 is located on the side of the mounting ring 101 away from the hoop plate 102. The connector 106 includes a slide rail arranged on the side frame 104 and perpendicular to the axis of the mounting ring 101. A movable seat is installed on the slide rail. A sliding sleeve extending parallel to the axis of the mounting ring 101 extends on the movable seat. The sliding sleeve The inner sleeve is provided with a sliding rod, and the end of the sliding rod is connected to the connecting seat 105. In addition, the connecting seats 105 in the two sets of exoskeleton protection mechanisms 100 are hingedly connected and the hinged axis formed at the hinge point is named the rotating axis. The rotating axis is equivalent to The "articulation point center of the lower leg mechanism and the thigh mechanism" is described in the patent document mentioned in the background art.

An adjusting component is also provided between the side frame 104 and the connecting seat 105. The adjusting component is used to adjust the position of the rotating axis so that the rotating axis coincides with the center of the knee joint.

Specifically, referring to Figures 4 and 5, the adjustment component includes two sets of adjustment units, and the two sets of adjustment units are respectively located on both sides of the connecting seat 105 along the extending direction of the slide rod.

The adjustment unit includes a screw rod 107 and a knob 109 installed on the side frame 104. The screw rod 107 is parallel to the axis of the mounting ring 101, and the knob 109 is perpendicular to the axis of the mounting ring 101. There is a gap between the knob 109 and the screw 107. The power connection is realized through the bevel gear set, and the screw rod 107 can be rotated by turning the knob 109.

A sliding seat 108 is installed on the outside of the screw rod 107. The sliding seat 108 also forms a sliding fit with the side frame 104. The rotation of the screw rod 107 can drive the sliding seat 108 to move along the axis of the screw rod 107.

A link assembly 110 is hingedly provided between the sliding seat 108 and the connecting seat 105 .

The working process of Embodiment 1 is as follows:

First, two sets of exoskeleton protection mechanisms 100 are put on the patient's legs, one set is located at the calf and the other is located at the thigh. This process is a rough adjustment to make the rotation axis as close to the center of the knee joint as possible;

Then, fine-tune the two sets of exoskeleton protection mechanisms 100 according to the position of the rotating axis and the center of the knee joint. For example, if the position of the rotating axis is lower than the knee joint, then the rotating axis needs to be moved upward. Specifically, loosen the thigh Then, twist the knob 109 of the exoskeleton protection mechanism 100 at the calf position to rotate the screw rod 107 and drive the sliding base 108 to move. When the sliding base 108 moves, it can pass the connecting rod assembly The 110 traction connection base 105 is offset, thereby achieving fine adjustment of the position of the rotation axis, and making the rotation axis coincide with the center of the knee joint as much as possible.

Embodiment 2

Referring to Figures 6-9, the connecting rod assembly 110 includes a sleeve 111. The closed end of the sleeve 111 is hinged with the sliding seat 108, and the open end is provided with an end cap 116.

Referring to Figure 9, one side of the sleeve column 111 is provided with a side groove 1111, and the other side is provided with a side groove 1115. The bottom of the side groove 1111 is provided with a connecting hole 1113 and a connecting hole 2 1114, wherein the connecting hole One 1113 is close to the open end of the sleeve column 111, and the connecting hole two 1114 is close to the closed end of the sleeve column 111. The bottom of the side groove 1115 is provided with a connecting hole three 1116 and a connecting hole four 1117. Among them, the connecting hole three 1116 is close to the sleeve column 1116. The open end of the sleeve 111, the connecting hole 1117 is close to the closed end of the sleeve column 111.

The two side walls of the side groove 1111 along the groove width direction are each provided with an arc groove. The two arc grooves are coaxial and the area between the two arc grooves constitutes a middle hole 1112 in the shape of a complete cylindrical hole.

Referring to Figures 6 to 8, a sealing plate 112 is provided at the notch of the side groove 1111, a valve core 113 is set inside the middle hole 1112, and a valve hole 1131 is provided on the outer circumferential surface of the valve core 113 along the radial direction. A valve stem extends from the end of the valve core 113 and the end of the valve stem extends to the outside. By twisting the valve stem, the valve core 113 can be rotated, so that the valve hole 1131 is connected or not connected with the side groove 1111, and is connected. When , the connection area is adjustable.

A sealing plate 114 is provided at the notch of the second side groove 1115, and an elastic piece 115 is provided at the bottom of the side groove 1115. One end of the elastic piece 115 is fixed to the bottom of the side groove 1115, and the other end crosses the connecting hole 3. 1116, the connecting hole 1116 can be blocked by the elastic piece 115, and the fluid in the sleeve column 111 can flow in one direction through the connecting hole 1116 toward the side groove 2 1115.

Referring to Figures 6 and 8, a fixed column 117 extends from the end face of the end cap 116. The fixed column 117 is located in the sleeve column 111 and forms a sealing fit between the two. There are two connecting grooves 118 and they are respectively connected with the first connection hole 1113 and the third connection hole 1116.

A piston 119 is set inside the sleeve column 111. A piston rod 120 extends from the end of the piston 119. The end of the piston rod 120 passes through the escape hole provided on the fixed column 117 and the end cover 116 and is provided with a support 121. The support 121 is hingedly connected to the connecting seat 105, and a spring 122 is provided between the piston 119 and the closed end of the sleeve column 111. Initially, under the elastic force of the spring 122, the piston 119 fits the fixed column 117.

The connecting rod assembly 110 is provided with a hydraulic medium, such as hydraulic oil.

The working process of Embodiment 2 is as follows:

Initially, the valve core 113 is closed, and the hydraulic medium in the sleeve column 111 cannot pass through the side groove 1111, nor can it enter the connecting groove 118 through the connecting hole 3 1116. That is to say, the hydraulic medium in the connecting rod assembly 110 cannot flow. , so the connecting rod assembly 110 can be regarded as an integrated structure, equivalent to a connecting rod. At this time, through the cooperation of the two sets of exoskeleton protection mechanisms 100, the knee joint is prevented from being stressed;

During the recovery period, in order to facilitate the recovery of the knee joint, it is necessary to regularly subject the knee joint to a certain amount of pressure based on the recovery status. Specifically:

The patient or medical staff twists the valve core 113 so that the valve hole 1131 is connected with the side groove 1111 and the connecting area is small. At this time, the patient tries to walk. When walking, the leg where the knee joint is located stands on the ground and bears the weight of the human body. During the process, since the hydraulic medium in the sleeve column 111 can enter the connecting groove 118 through the side groove 1111, the piston 119 can move away from the end cover 116 in the sleeve column 111, and the spring 122 is compressed, causing the knee joint to be subject to a certain force. Then, when the leg where the knee joint is located leaves the ground, the spring 122 will release the elastic force to reset the piston 119. The hydraulic medium in the connecting groove 118 has two ways to return to the sleeve column 111, one is through the side groove One 1111 returns to the sleeve column 111, and the other returns to the sleeve column 111 through the connecting hole 3 1116 and the side groove 2 1115. During this process:

1. When the leg with the knee joint is standing on the ground and bearing the weight of the human body, the moving speed of the piston 119 depends on the flow rate of the hydraulic medium in the side groove 1111, and the flow rate in the side groove 1111 depends on the side. The communication area between groove one 1111 and the valve hole 1131, that is to say, at the beginning, the communication area between the valve hole 1131 and the side groove 1111 can be made small, and then the patient stands up and gradually shifts the body's center of gravity to The injured leg gradually bears the weight of the body. During this process, due to the small connection area and the slow flow of the hydraulic medium, the movement of the piston 119 will also be slower, so the pressure transferred to the knee joint will also be slower. The speed increases relatively slowly. When the patient feels discomfort in the knee joint and cannot bear more pressure, the patient moves the center of gravity away from the injured leg. Since the hydraulic medium in the connecting groove 118 has two ways to return to the sleeve column 111, the spring 122 will quickly release the elastic force to reset the connecting rod assembly 110, and the pressure on the knee joint will be transferred away in time;

Preferably, the sleeve 111 is made of a transparent material, such as transparent plastic. When the patient feels discomfort in the knee joint, the moving distance of the piston 119 can be observed to adjust the communication area between the valve hole 1131 and the side groove 1111. , and then the patient can walk at a normal speed, giving appropriate pressure to the knee joint and promoting knee joint recovery.

2. According to 1, in this scheme, when the communication area between the valve hole 1131 and the side groove 1111 is fixed, the faster the patient walks, the smaller the moving distance of the piston 119 is, that is, The faster the patient walks, the less pressure the knee joint bears. Based on this, during the patient's targeted rehabilitation training of the knee joint, the patient can adjust the amount of pressure on the knee joint according to the walking speed to improve the effectiveness of targeted rehabilitation training of the knee joint. Effect.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above in preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art , without departing from the scope of the technical solution of the present invention, the technical contents disclosed above can be used to make some changes or modifications to equivalent embodiments with equivalent changes. However, without departing from the technical solution of the present invention, according to the technical solution of the present invention, In essence, any brief modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (8)

1. The knee joint bracket is characterized in that the exoskeleton protection mechanism (100) comprises a mounting ring (101), hoop plates (102) are hinged at the end part of the mounting ring (101), two hoop plates (102) are arranged along the circumferential direction of the mounting ring (101) in an array manner, binding belts are arranged between the two hoop plates (102), a connecting member (103) is arranged on the outer circular surface of the mounting ring (101), and two groups of connecting members (103) are arranged along the circumferential direction of the mounting ring (101) in an array manner;

the connecting member (103) comprises a side frame (104) connected with the mounting ring (101), a connecting seat (105) is arranged on the side frame (104) through a connecting piece (106), the connecting seat (105) is positioned on one side, deviating from the hoop plate (102), of the mounting ring (101), the connecting seats (105) in the two groups of exoskeleton protection mechanisms (100) are hinged, a hinge shaft formed at a hinge point is named as a rotating shaft, and an adjusting part for adjusting the position of the rotating shaft is arranged between the side frame (104) and the connecting seat (105).

2. The knee joint support made of high polymer materials with adjustable supporting force according to claim 1, wherein the connecting piece (106) comprises a sliding rail which is arranged on the side frame (104) and is perpendicular to the axis of the mounting ring (101), a movable seat is arranged on the sliding rail, a sliding sleeve which is parallel to the axis of the mounting ring (101) extends on the movable seat, a sliding rod is sleeved in the sliding sleeve, and the tail end of the sliding rod is connected with the connecting seat (105).

3. The knee joint bracket of high polymer material with adjustable supporting force according to claim 1, wherein the adjusting component comprises two groups of adjusting units, and the two groups of adjusting units are respectively positioned at two sides of the connecting seat (105) along the axial line direction of the mounting ring (101).

4. A knee joint support made of high polymer material and capable of adjusting supporting force according to claim 3, wherein the adjusting unit comprises a sliding seat (108) slidably mounted on the side frame (104) along the axial line direction of the mounting ring (101), and a connecting rod assembly (110) is hinged between the sliding seat (108) and the connecting seat (105).

5. The knee joint bracket made of high polymer materials with adjustable supporting force according to claim 4, wherein a screw rod (107) and a knob (109) are arranged on the side frame (104), the screw rod (107) is parallel to the axial line of the mounting ring (101), the knob (109) is in power connection with the screw rod (107), and the sliding seat (108) is connected with the screw rod (107).

6. The knee-joint bracket of an adjustable supporting force according to claim 4, wherein the connecting rod assembly (110) comprises a sleeve column (111), the closed end of the sleeve column (111) is hinged with the sliding seat (108), the open end is provided with an end cover (116), one side surface of the sleeve column (111) is provided with a side groove I (1111), the other side surface is provided with a side groove II (1115), the groove bottom of the side groove I (1111) is provided with a connecting hole I (1113) and a connecting hole II (1114), the groove bottom of the side groove II (1115) is provided with a connecting hole III (1116) and a connecting hole IV (1117), the connecting hole I (1113) and the connecting hole III (1116) are close to the open end of the sleeve column (111), and the connecting hole II (1114) and the connecting hole IV (1117) are close to the closed end of the sleeve column (111).

7. The knee joint bracket of high molecular material with adjustable supporting force according to claim 6, wherein two side walls of the side groove I (1111) along the width direction of the groove are respectively provided with an arc groove, the two arc grooves are coaxial, and a middle hole (1112) in the shape of a complete cylindrical hole is formed in the area between the two arc grooves;

a sealing plate I (112) is arranged at the notch of the side groove I (1111), a valve core (113) is sleeved in the middle hole (1112), a valve hole (1131) is formed in the outer circular surface of the valve core (113) in a penetrating way in the radial direction, a valve rod extends from the end part of the valve core (113), the tail end of the valve rod extends to the outside, and the valve hole (1131) is not communicated with the side groove I (1111) in the initial stage;

the notch department of side tank II (1115) is provided with shrouding II (114), and the tank bottom department of side tank II (1115) is provided with elastic piece (115), and the one end of elastic piece (115) is fixed with the tank bottom of side tank II (1115), and the other end passes connecting hole III (1116), makes the fluid in the loop column (111) through connecting hole III (1116) one-way flow in towards side tank II (1115) through elastic piece (115).

8. The knee joint bracket of high polymer material with adjustable supporting force according to claim 7, wherein the end face of the end cover (116) is extended with a fixed column (117), the fixed column (117) is positioned in the sleeve column (111) and forms sealing fit with the fixed column, a connecting groove (118) is arranged on the outer circle surface of the fixed column (117) in a penetrating way along the axial line direction, two connecting grooves (118) are respectively communicated with a first connecting hole (1113) and a third connecting hole (1116), a piston (119) is sleeved in the sleeve column (111), a piston rod (120) is extended at the end part of the piston (119), a support (121) is arranged after the tail end of the piston rod (120) passes through avoidance holes arranged on the fixed column (117) and the end cover (116), the support (121) is hinged with the connecting seat (105), a spring (122) is arranged between the piston (119) and the closed end of the sleeve column (111), and the spring (122) enables the piston (119) to be attached to the fixed column (117) in an elastic way initially;

a hydraulic medium is provided in the link assembly (110).