CN114028056A - Knee joint stretches and bends supplementary brace - Google Patents

Abstract

The application provides a knee joint is stretched and is bent supplementary brace includes: first mount and second mount include respectively: an upper fixing frame and a lower fixing frame; the upper fixing frame is hinged with the lower fixing frame through a rotary connecting mechanism; the upper fixing frame and the lower fixing frame can rotate in a closing or opening way by taking the rotating connecting mechanism as a circle center; the two ends of the power assisting mechanism are respectively fixed on the upper fixing frame and the lower fixing frame and penetrate through the rotary connecting mechanism, and elastic resistance can be generated when the rotary connecting mechanism rotates in a closing mode or rebound tension can be provided when the rotary connecting mechanism rotates in an opening mode. This application is equipped with two side extension springs, can provide auxiliary power when stretching the knee after the patient accomplishes bending the knee, and the help patient stretches the knee, thereby avoids patient's patellofemoral articular surface to receive too big stress to cause articular surface damage, can be according to the initial length of the uneven condition adjustment extension spring of patient's inside and outside muscular strength, promotes muscular strength balance. Meanwhile, an eccentric wheel device is adopted, the linear thread of the stay wire during walking is changed, and the energy storage efficiency is improved.

Description

Knee joint stretches and bends supplementary brace

Technical Field

The application relates to the technical field of knee joint stretching auxiliary braces, in particular to a knee joint stretching and bending auxiliary brace.

Background

In a normal human body structure, a knee joint has a cartilage structure such as a meniscus, and the surfaces of a femoral pulley and a patella femoral joint also have cartilage, so that the effects of buffering vibration and reducing friction are achieved. However, due to the loss in work and exercise, the lower limb force line changes, cartilage is abraded, lower limb force line abnormality and hyperosteogeny are caused, knee joint pain and deformity are caused, and the life quality is seriously affected.

Usually, a person's legs are not straight or are in the form of a lap, an X-shaped leg, etc. These are the "lines of force" often spoken by the physician in the mouth. The force line is an important concept used by doctors to evaluate whether the congenital development of the lower limb bone structure of a patient is abnormal, the normal force line structure can correspond to the normal knee joint movement function, and when the force line goes wrong, the normal force line structure can also correspond to different pathological changes of the knee joint.

The knee joint fixing brace/orthosis is usually used for protection and treatment in clinic, can be continuously worn in daily activities, and has better convenience and patient compliance. Currently, a common knee brace is mainly a hinge-fixed brace, i.e., the knee brace plays a role in protecting the knee joint by absolute protection and motion avoidance.

However, such braces have the problem that the knee joint cannot flex. The inconvenience in activities such as going upstairs and downstairs and squatting may indicate the dysfunction of the patient. Meanwhile, the problem of the force line of a patient with the gonarthritis is not corrected, the problem of muscle force reduction can be caused by a single protection brace, the function recovery of the user is not facilitated, and a proper assembly scheme is not selected according to the muscle force and the malformation condition of the user.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present application provides a knee joint flexion and extension auxiliary brace, which is used to solve the problems of the existing knee joint braces in the prior art.

To achieve the above and other related objects, the present application provides a knee joint flexion and extension auxiliary brace, comprising: the first fixing frame and the second fixing frame are worn on two sides of the leg part through the binding bands; the first fixing frame and the second fixing frame respectively comprise: an upper fixing frame for being worn on thighs and a lower fixing frame for being worn on crus; the upper fixing frame is hinged with the lower fixing frame through a rotary connecting mechanism; the upper fixing frame and the lower fixing frame can rotate in a closing or opening mode by taking the rotating connecting mechanism as a circle center; and the two ends of the power-assisted mechanism are respectively fixed on the upper fixing frame and the lower fixing frame and penetrate through the rotary connecting mechanism, so that elastic resistance is generated when the rotary connecting mechanism rotates in a closed mode or rebound tension is provided when the rotary connecting mechanism rotates in an opened mode.

In an embodiment of the present application, the rotation connecting mechanism includes: the upper gear is fixedly connected to the bottom of the upper fixing frame; the lower gear is fixedly connected to the top of the lower fixing frame; the upper gear is meshed with the lower gear; the upper gear and the lower gear are respectively provided with a fixing hole in the middle; the left side part of the fixing hole is of a rectangular structure, the right side part of the fixing hole is of a semicircular structure, and sawteeth are arranged on the outer side circular arc of the semicircular structure.

In an embodiment of the present application, the upper end of the rectangular structure of the upper gear is fixedly connected to the bottom of the upper fixing frame, and the lower end of the rectangular structure of the lower gear is fixedly connected to the top of the lower fixing frame; the saw teeth of the semicircular structure of the upper gear are meshed with the saw teeth of the semicircular structure of the lower gear; when the angle between the upper fixing frame and the lower fixing frame is 180 degrees, the lower end of the rectangular structure of the upper gear is abutted against the upper end of the rectangular structure of the lower gear so as to limit the further opening and rotation between the upper gear and the lower gear.

In an embodiment of the present application, an eccentric wheel is disposed on one side of the lower gear, so that the rotary connection mechanism can increase the displacement of the pull wire of the boosting mechanism disposed on one side of the eccentric wheel when rotating in a closed state; a compensation nut is arranged on one side of the upper gear wheel, which corresponds to the eccentric wheel; the thickness of the compensation nut is the same as that of the eccentric wheel.

In an embodiment of the present application, the rotation connecting mechanism further includes: the outer side fixing piece, the inner side fixing piece, the upper end stud, the lower end stud, the fastening nut, the bearing, the outer side gasket, the middle gasket and the inner side gasket; wherein, an upper through hole and a lower through hole are respectively arranged on the outer side fixing sheet in the vertical direction; an upper nut hole and a lower nut hole for embedding the fastening nut are respectively formed in the inner side fixing sheet in the vertical direction; the bearing is embedded in the fixing holes of the upper gear and the lower gear; the stud at the upper end sequentially penetrates through an upper through hole of the outer fixing piece, the outer side gasket, a bearing arranged on the upper gear, the middle gasket, the compensating nut, the outer side gasket and a fastening nut embedded in an upper nut hole; the lower end stud sequentially penetrates through a lower through hole of the outer side fixing piece, the outer side gasket, a bearing arranged on the lower gear, a middle gasket, an eccentric wheel, the outer side gasket and a fastening nut embedded in a lower nut hole.

In an embodiment of the present application, the power assisting mechanism includes: the top of the spring is fixed on the fixing column of the upper fixing frame; the bottom of the spring is connected with a pull wire; and the adjusting assembly is arranged on the lower fixing frame and is used for fixing the bottom of the stay wire so as to adjust the initial length of the stay wire.

In one embodiment of the present application, an eccentric wheel is disposed on one side of the lower gear; a pull wire connected between the spring and the adjusting component passes through one side of the eccentric wheel; the spring, the pull wire, the eccentric wheel and the adjusting component are positioned on the same plane.

In one embodiment of the present application, the adjusting assembly includes: the adjusting knob, the outer side baffle, the anti-drop wedge block, the adjusting plate and the inner side baffle; the inner side baffle is provided with a groove with the same size as the adjusting plate; the adjusting knob sequentially penetrates through an outer side through hole in the outer side baffle, the anti-falling wedge block and an insertion hole in the adjusting plate and is inserted into a groove in the inner side baffle; the bottom of the stay wire is fixed at a position between the anti-falling wedge block and the adjusting plate on the adjusting knob; the adjusting knob is pulled outwards to enable the adjusting plate to be separated from the groove, the adjusting knob is rotated to adjust the length of the drawn wire, and then the adjusting knob is pushed inwards to enable the adjusting plate to be embedded into the groove.

In an embodiment of the present application, the first fixing frame and the second fixing frame are respectively provided with one or more binding belt buckles for fastening the binding belt.

In an embodiment of the present application, the inner sides of the first fixing frame and the second fixing frame are respectively provided with a detachable inflation cushion; and/or a detachable elastic gasket is arranged on the inner side of the rotating connecting mechanism.

In summary, the present application provides a knee joint flexion and extension auxiliary brace, the brace includes: the first fixing frame and the second fixing frame are worn on two sides of the leg part through the binding bands; the first fixing frame and the second fixing frame respectively comprise: an upper fixing frame for being worn on thighs and a lower fixing frame for being worn on crus; the upper fixing frame is hinged with the lower fixing frame through a rotary connecting mechanism; the upper fixing frame and the lower fixing frame can rotate in a closing or opening mode by taking the rotating connecting mechanism as a circle center; and the two ends of the power-assisted mechanism are respectively fixed on the upper fixing frame and the lower fixing frame and penetrate through the rotary connecting mechanism, so that elastic resistance is generated when the rotary connecting mechanism rotates in a closed mode or rebound tension is provided when the rotary connecting mechanism rotates in an opened mode.

The following beneficial effects are achieved:

this application knee joint is stretched and is bent supplementary brace be equipped with two side extension springs, can provide auxiliary power when the patient accomplishes to bend the knee after stretching the knee, help the patient stretch the knee, thereby avoid the patient patellofemoral articular surface to receive too big stress to cause articular surface damage. Meanwhile, an eccentric wheel device is adopted, the linear thread of the stay wire during walking is changed, and the energy storage efficiency is improved. By adopting the tension springs on the two sides, the initial length of the tension springs can be adjusted according to the condition that the muscle force on the inner side and the outer side of a patient is unbalanced, so that the assistance forces with different sizes are provided for the inner side and the outer side, and the muscle force balance is promoted.

Drawings

Fig. 1 is a schematic structural view of an auxiliary brace for knee joint flexion and extension in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a rotating connection mechanism according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a power assisting mechanism according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of an adjusting assembly according to an embodiment of the present disclosure.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only schematic and illustrate the basic idea of the present application, and although the drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complex.

Throughout the specification, when a part is referred to as being "connected" to another part, this includes not only a case of being "directly connected" but also a case of being "indirectly connected" with another element interposed therebetween. In addition, when a certain part is referred to as "including" a certain component, unless otherwise stated, other components are not excluded, but it means that other components may be included.

The terms first, second, third, etc. are used herein to describe various elements, components, regions, layers and/or sections, but are not limited thereto. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the scope of the present application.

Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.

In view of the above-mentioned shortcomings of the prior art, the present invention is to provide a knee brace that can provide a certain assistance force during flexion and extension of the knee joint and can correct the force line of the lower limb. The user can move normally basically and simultaneously play the roles of protecting and correcting the knee joint, and a proper assembly scheme is selected according to the muscle strength and the malformation condition of the user.

Fig. 1 shows a schematic structural view of a knee joint flexion and extension auxiliary brace in the embodiment of the present application. As shown, the brace includes:

the first fixing frame 100 and the second fixing frame 200 are respectively provided with one or more binding belt buckles 150 for clamping the binding belt 160, and the first fixing frame 100 and the second fixing frame 200 are worn on two sides of the leg through the binding belt 160. For example, one fixed mount is fixed to the left side of the leg and one fixed to the right side of the leg.

Specifically, the first fixture 100 and the second fixture 200 respectively include: an upper mount 110 for wearing on the thigh and a lower mount 120 for wearing on the calf. For example, each of the upper or lower fixing frames 110 or 120 may be provided with a plurality of strap buckles 150, so that the upper fixing frame 110 may be directly tied to the thigh by the strap 160, or the lower fixing frame 120 may be directly tied to the calf by the strap 160; alternatively, the two upper holders 110 may be fixed by a binding band 160, or the two lower holders 120 may be fixed by a binding band 160.

Further, in order to improve the wearing comfort of the brace, the inner sides of the first fixing frame 100 and the second fixing frame 200 are respectively provided with a detachable inflation air cushion. For example, the detachable inflatable air cushion is an inflatable air bag, and the brace can be adjusted to a comfortable state by inflating a proper amount of air.

As shown in fig. 2, the first fixture 100 and the second fixture 200 further include: the coupling mechanism 130 is rotated. The upper fixing frame 110 is hinged to the lower fixing frame 120 through a rotary connecting mechanism 130; the upper fixing frame 110 and the lower fixing frame 120 can perform closing rotation or opening rotation by taking the rotating connection mechanism 130 as a circle center;

in an embodiment of the present application, the rotating connection mechanism 130 includes: an upper gear 131 fixedly connected to the bottom of the upper fixing frame 110; a lower gear 132 fixedly coupled to a top of the lower fixing frame 120; the upper gear 131 is engaged with the lower gear 132, so that the upper fixing frame 110 and the lower fixing frame 120 can be opened and closed at a certain angle, for example, in a range of 0 to 180 degrees.

Specifically, the upper gear 131 and the lower gear 132 are respectively provided with a fixing hole at a middle position; the left side part of the fixing hole is of a rectangular structure, the right side part of the fixing hole is of a semicircular structure, and sawteeth are arranged on the outer side circular arc of the semicircular structure.

That is, the upper gear 131 and the lower gear 132 are respectively formed by splicing a rectangular structure and a semicircular structure, and the saw teeth of the semicircular structure of the upper gear 131 are engaged with the saw teeth of the semicircular structure of the lower gear 132. In addition, the rectangular structure is not a strict rectangular block, and one end of the rectangular structure, which is connected with the semicircular structure, is provided with an unfilled corner, and the other end is an adjacent end of the two gears, so that the unfilled corner can prevent the mechanical hard extrusion when the sawteeth of the two gears are meshed when the upper fixing frame 110 and the lower fixing frame 120 form an angle of 180 degrees, and the condition that the upper gear 131 and the lower gear 132 are damaged is reduced.

The upper end of the rectangular structure of the upper gear 131 is fixedly connected to the bottom of the upper fixing frame 110, and the lower end of the rectangular structure of the lower gear 132 is fixedly connected to the top of the lower fixing frame 120. For example, the bottom of the upper fixing frame 110 may be welded to the upper end of the rectangular structure of the upper gear 131, and the top of the lower fixing frame 120 may be welded to the lower end of the rectangular structure of the lower gear 132.

When the angle between the upper fixing frame 110 and the lower fixing frame 120 is 180 °, the lower end of the rectangular structure of the upper gear 131 is in contact with the upper end of the rectangular structure of the lower gear 132, so as to limit the further opening and rotation between the upper gear 131 and the lower gear 132. That is, the present application makes the maximum opening angle of the upper gear 131 and the lower gear 132 be a straight angle of 180 °.

In an embodiment of the present application, the rotating connection mechanism 130 further includes: eccentric 133, compensation nut 134, outside fixing plate 135, inside fixing plate 136, upper end stud 1371, lower end stud 1372, fastening nut 138, bearing 139, outside washer 1310, middle washer 1311, and inside washer 1312.

Wherein, an upper through hole 1351 and a lower through hole 1352 are respectively arranged on the outer fixing sheet 135 in the vertical direction; an upper nut hole 1361 and a lower nut hole 1362 for embedding the fastening nut 138 are respectively arranged on the inner side fixing plate 136 in the vertical direction; the bearing 139 is embedded in the fixing holes of the upper gear 131 and the lower gear 132. The upper end stud 1371 and the lower end stud 1372 are respectively matched with the size of the fastening nut 138.

The upper stud 1371 passes through an upper through hole 1351 of the outer fixing plate 135, an outer spacer 1310, a bearing 139 arranged on the upper gear 131, a middle spacer 1311, a compensation nut 134, the outer spacer 1310 and a fastening nut 138 embedded in an upper nut hole 1361 in sequence; the lower stud 1372 passes through the lower through hole 1352 of the outer fixing plate 135, the outer washer 1310, the bearing 139 disposed on the lower gear 132, the middle washer 1311, the eccentric wheel 133, the outer washer 1310, and the fastening nut 138 disposed on the lower nut hole 1362 in sequence.

The outer side and the inner side are the inner sides facing towards the thighs, that is, the corresponding inner sides of the first fixing frame 100 and the second fixing frame 200 are opposite, and the outer sides are also opposite. It should be noted that, after the upper end stud 1371 or the lower end stud 1372 passes through the components of the rotating connecting mechanism 130 in sequence, the end of the upper end stud 1371 or the lower end stud 1372 is just embedded in the fastening nut 138, and does not pass through the fastening nut 138 to leak out a part of the stud, so that the leaked stud can be prevented from contacting the skin to cause scratches.

In order to further avoid the skin from being scratched by the rotating connecting mechanism 130, a detachable elastic gasket is arranged inside the rotating connecting mechanism 130, and preferably, the detachable elastic gasket covers at least a fastening nut 138 embedded on the inner fixing piece 136.

In an embodiment of the present application, an eccentric wheel 133 is disposed on one side of the lower gear 132, so that the rotational connection mechanism 130 can increase the displacement of the wire 142 of the boosting mechanism 140 disposed on one side of the eccentric wheel 133 during the closing rotation; a compensation nut 134 is arranged on one side of the upper gear 131 corresponding to the eccentric wheel 133; the thickness of the compensation nut 134 is the same as that of the eccentric wheel 133. Here, the compensation nut 134 mainly provides the same thickness as the eccentric wheel 133 so that the thickness of the corresponding upper space and lower space in the rotating connecting mechanism 130 is similar or the same, thereby ensuring the stability and installation convenience of the rotating connecting mechanism 130.

The eccentric wheel 133, i.e. the rotation center, is not on the center of a circle, so that rotation with non-central symmetry can be realized, and the irregular rotation of the eccentric wheel is just utilized by the application to be matched with the power assisting mechanism 140 to realize that the rotation connecting mechanism 130 generates elastic resistance when performing closed rotation or provides rebound tension when performing open rotation.

As shown in fig. 3, the first and second holders 100 and 200 respectively include: the two ends of the power-assisted mechanism 140 are respectively fixed to the upper fixing frame 110 and the lower fixing frame 120, and penetrate through the rotating connection mechanism 130, so that elastic resistance is generated when the rotating connection mechanism 130 rotates in a closing manner or rebound tension is provided when the rotating connection mechanism 130 rotates in an opening manner.

In an embodiment of the present application, the power assisting mechanism 140 includes: a spring 141, the top of which is fixed on the fixing column of the upper fixing frame 110; the bottom of the spring 141 is connected with a pull wire 142; an adjustment assembly 143 that secures a bottom portion of the pull wire 142 for adjusting an initial length of the pull wire 142.

In one embodiment of the present application, an eccentric wheel 133 is disposed on one side of the lower gear 132; a pull wire 142 connected between the spring 141 and the adjusting assembly 143 passes through one side of the eccentric wheel 133; the spring 141, the pull wire 142, the eccentric wheel 133 and the adjusting component 143 are located on the same plane.

For example, when the wearer is in the 0 ° position of standing knee bending, the upper gear 131 and the lower gear 132 are in an insufficient meshing state, and the rectangular structures of the upper gear 131 and the lower gear 132 are in contact, so that the knee joint can be in the 0 ° position without the assistance of the spring 141, and the injury to the knee joint caused by overexertion can be avoided. When the knee is bent, the upper gear 131 and the lower gear 132 are fully meshed, the eccentric wheel 133 also starts to rotate under the rotation of the lower gear 132, and the radius of one side of the eccentric wheel 133 close to the pull wire 142 is increased, so that the stroke of the pull wire 142 is lengthened, the spring 141 can be fully pulled, and the kinetic energy is stored as elastic potential energy; when the knee is extended, the stored elastic potential energy is slowly released under the elastic action of the spring 141, the radius of the eccentric wheel 133 close to the pull wire 142 is reduced, the spring 141 is shortened, and the pull wire 142 is pulled back to extend the knee joint.

For another example, when the wearer squats, the spring 141 is passively elongated, which reduces the active moment of the quadriceps femoris and reduces the stress on the patellofemoral joint surface, thereby helping to protect the patellofemoral joint.

As shown in fig. 4, the adjusting assembly 143 includes: an adjusting knob 1431, an outer baffle 1432, an anti-dropping wedge block 1433, an adjusting plate 1434, and an inner baffle 1435; the inside guard 1435 is provided with a groove 1436 having the same size as the adjusting plate 1434.

The adjusting knob 1431 sequentially passes through an outer through hole on the outer baffle 1432, the anti-falling wedge block 1433 and an insertion hole on the adjusting plate 1434, and is inserted into a groove 1436 on the inner baffle 1435; the bottom of the pull wire 142 is fixed to the adjusting knob 1431 at a position between the anti-slip wedge 1433 and the adjusting plate 1434.

In operation, the adjustment knob 1431 is pulled outward to disengage the adjustment plate 1434 from the groove 1436, the adjustment knob 1431 is rotated to adjust the length of the drawn wire, and the adjustment knob 1431 is pushed inward to engage the adjustment plate 1434 with the groove 1436.

For example, when it is desired to pre-adjust the initial length of the spring 141, the adjustment knob 1431 can be rotated by first pulling the adjustment knob 1431 outward of the pivot connection 130 to disengage the adjustment plate 1434 from the recess 1436. Rotating the adjustment knob 1431 to wind more pull wires 142 or retrieving the wound pull wires 142, then placing the adjustment knob 1431 back inside the rotating linkage 130 to drop the adjustment plate 1434 back into the groove 1436, trying to see if the pre-loaded assist is appropriate, and then repeating this process until the pre-loaded assist is adjusted to the appropriate magnitude.

Preferably, for the wearer with uneven muscle strength inside and outside the knee joint, the magnitude of the pre-loading assisting force of the assisting mechanisms 140 of the first fixing frame 100 and the second fixing frame 200 can be respectively adjusted according to the muscle strength condition, so that the muscle strength is in an even state during the knee joint movement. Meanwhile, the generated moment difference is helpful for correcting the varus and valgus deformity of the knee joint.

For example, in use, the upper fixing frame 110 of the first fixing frame 100 and the second fixing frame 200 is tied to the thigh by the strap 160 through the strap buckle 150, the lower fixing frame 120 is tied to the calf by the strap 160 through the strap buckle 150, and the brace is firmly attached to the limb by the strap 160 passing through the corresponding strap buckle 150 of the first fixing frame 100 or the second fixing frame 200. The inflatable air bags on the inner sides of the upper fixing frame 110 and the lower fixing frame 120 are adjusted to adjust the brace to a comfortable state. The adjusting knob 1431 of the power assisting mechanism 140 of the first fixing frame 100 or the second fixing frame 200 is adjusted respectively to make the bilateral spring 141 in a proper initial length, so as to provide a proper power assisting for the extension of the knee joint.

Overall, this application knee joint is stretched and is bent auxiliary brace be equipped with two side extension springs, can provide auxiliary power when the patient is accomplished to bend the knee back and is stretched the knee, help the patient to stretch the knee, thereby avoid patient patellofemoral articular surface to receive too big stress and cause articular surface damage. Meanwhile, an eccentric wheel device is adopted, the linear thread of the stay wire during walking is changed, and the energy storage efficiency is improved. By adopting the tension springs on the two sides, the initial length of the tension springs can be adjusted according to the condition that the muscle force on the inner side and the outer side of a patient is unbalanced, so that the assistance forces with different sizes are provided for the inner side and the outer side, and the muscle force balance is promoted.

The application effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims (10)

1. A knee joint flexion and extension auxiliary brace, characterized in that the brace comprises:

the first fixing frame and the second fixing frame are worn on two sides of the leg part through the binding bands; the first fixing frame and the second fixing frame respectively comprise:

an upper fixing frame for being worn on thighs and a lower fixing frame for being worn on crus;

the upper fixing frame is hinged with the lower fixing frame through a rotary connecting mechanism; the upper fixing frame and the lower fixing frame can rotate in a closing or opening mode by taking the rotating connecting mechanism as a circle center;

and the two ends of the power-assisted mechanism are respectively fixed on the upper fixing frame and the lower fixing frame and penetrate through the rotary connecting mechanism, so that elastic resistance is generated when the rotary connecting mechanism rotates in a closed mode or rebound tension is provided when the rotary connecting mechanism rotates in an opened mode.

2. The knee joint flexion and extension aid brace of claim 1, wherein the rotational connection mechanism comprises:

the upper gear is fixedly connected to the bottom of the upper fixing frame;

the lower gear is fixedly connected to the top of the lower fixing frame;

the upper gear is meshed with the lower gear;

the upper gear and the lower gear are respectively provided with a fixing hole in the middle; the left side part of the fixing hole is of a rectangular structure, the right side part of the fixing hole is of a semicircular structure, and sawteeth are arranged on the outer side circular arc of the semicircular structure.

3. The auxiliary knee joint flexion and extension brace as claimed in claim 2, wherein the upper end of the rectangular structure of the upper gear is fixedly connected to the bottom of the upper fixing frame, and the lower end of the rectangular structure of the lower gear is fixedly connected to the top of the lower fixing frame;

the saw teeth of the semicircular structure of the upper gear are meshed with the saw teeth of the semicircular structure of the lower gear;

when the angle between the upper fixing frame and the lower fixing frame is 180 degrees, the lower end of the rectangular structure of the upper gear is abutted against the upper end of the rectangular structure of the lower gear so as to limit the further opening and rotation between the upper gear and the lower gear.

4. The knee joint flexion and extension auxiliary brace according to claim 2, wherein an eccentric wheel is provided at one side of the lower gear, so that the rotary connecting mechanism can increase the displacement of the pull wire of the boosting mechanism provided at one side of the eccentric wheel during the closing rotation; a compensation nut is arranged on one side of the upper gear wheel, which corresponds to the eccentric wheel; the thickness of the compensation nut is the same as that of the eccentric wheel.

5. The knee joint flexion and extension aid brace of claim 3, wherein the rotational connection mechanism further comprises:

the outer side fixing piece, the inner side fixing piece, the upper end stud, the lower end stud, the fastening nut, the bearing, the outer side gasket, the middle gasket and the inner side gasket;

wherein, an upper through hole and a lower through hole are respectively arranged on the outer side fixing sheet in the vertical direction; an upper nut hole and a lower nut hole for embedding the fastening nut are respectively formed in the inner side fixing sheet in the vertical direction; the bearing is embedded in the fixing holes of the upper gear and the lower gear;

the stud at the upper end sequentially penetrates through an upper through hole of the outer fixing piece, the outer side gasket, a bearing arranged on the upper gear, the middle gasket, the compensating nut, the outer side gasket and a fastening nut embedded in an upper nut hole;

the lower end stud sequentially penetrates through a lower through hole of the outer side fixing piece, the outer side gasket, a bearing arranged on the lower gear, a middle gasket, an eccentric wheel, the outer side gasket and a fastening nut embedded in a lower nut hole.

6. The knee joint flexion and extension auxiliary brace of claim 1, wherein the assistance mechanism comprises:

the top of the spring is fixed on the fixing column of the upper fixing frame;

the bottom of the spring is connected with a pull wire;

and the adjusting assembly is arranged on the lower fixing frame and is used for fixing the bottom of the stay wire so as to adjust the initial length of the stay wire.

7. The auxiliary brace for knee joint flexion and extension according to claim 5, wherein one side of the lower gear is provided with an eccentric wheel; a pull wire connected between the spring and the adjusting component passes through one side of the eccentric wheel; the spring, the pull wire, the eccentric wheel and the adjusting component are positioned on the same plane.

8. The knee flexion assistance brace of claim 5, wherein the adjustment assembly comprises: the adjusting knob, the outer side baffle, the anti-drop wedge block, the adjusting plate and the inner side baffle; the inner side baffle is provided with a groove with the same size as the adjusting plate;

the adjusting knob sequentially penetrates through an outer side through hole in the outer side baffle, the anti-falling wedge block and an insertion hole in the adjusting plate and is inserted into a groove in the inner side baffle; the bottom of the stay wire is fixed at a position between the anti-falling wedge block and the adjusting plate on the adjusting knob;

the adjusting knob is pulled outwards to enable the adjusting plate to be separated from the groove, the adjusting knob is rotated to adjust the length of the drawn wire, and then the adjusting knob is pushed inwards to enable the adjusting plate to be embedded into the groove.

9. The auxiliary knee joint flexion and extension brace of claim 1, wherein the first and second fastening frames each have one or more strap fasteners for fastening a strap.

10. The knee joint flexion and extension auxiliary brace according to claim 1, wherein the inner sides of the first and second fixing frames are respectively provided with a detachable inflation cushion; and/or a detachable elastic gasket is arranged on the inner side of the rotating connecting mechanism.

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