CN215384934U - Spacing adjustable brace hinge and knee joint brace - Google Patents

Abstract

The utility model provides a knee joint brace, which is characterized by comprising: a thigh support to be worn on a thigh; a lower leg support to be worn on the lower leg; the thigh support is provided with two thigh supporting strips which are respectively positioned at two side positions of a thigh, the shank support is provided with two shank supporting strips which are respectively positioned at two side positions of a shank, the connecting part is provided with two adjusting mechanisms which respectively connect the thigh supporting strips and the shank supporting strips at the same side in a rotating manner, an included angle is formed between rotating planes of the two adjusting mechanisms, the thigh support is also provided with an elastic belt, two ends of the elastic belt are respectively connected to the two thigh supporting strips, and the position of the elastic belt corresponds to the position, close to a knee, of the front side of the thigh of a user. The knee joint brace disclosed by the utility model can adapt to the change of the contour of the thigh in flexion and extension movements, can overcome the defect of easiness in slipping down and loosening, and improves the wearing comfort of a user.

Description

Spacing adjustable brace hinge and knee joint brace

Technical Field

The utility model belongs to the field of medical instruments, and relates to a limiting adjustable brace hinge and a knee joint brace comprising the same.

Background

The knee joint brace is a common assistive device worn on the lower limb of a human body, and has the functions of correcting deformity, improving gait, lightening or eliminating the knee joint so as to protect the knee joint, promoting the functional recovery of the lower limb and the like.

The individual variability of different users is large, and accordingly different requirements are met when the knee brace is worn. For example, in some users, the thigh and the calf can be fully extended when the lower limb is extended (i.e. the included angle between the thigh and the calf is substantially 180 °), in other users, there is a straightening obstacle or knee joint hyperextension, and the extension angle between the thigh and the calf is limited when the lower limb is extended (e.g. the included angle is 170 °, 160 ° or less at maximum extension).

In order to adapt to these individual differences, some hinge structures capable of realizing rotation angle limitation and adjusting the limitation range appear in the prior art, for example, chinese invention CN201810271493.0 discloses a knee joint cruciate ligament brace, which has two arc plates corresponding to the big and small legs respectively and an adjusting chuck connecting the two arc plates, the adjusting chuck has structures such as a limit switch, a lock plate, an adjusting gear, a turntable, a limit post, etc., the adjusting gear is engaged and limited by moving the lock plate through the limit switch, i.e., the overlapping range of the limit groove of the adjusting gear and the limit groove of the turntable can be adjusted, thereby limiting the moving range of the limit post and realizing the adjustment of the rotation angle range between the arc plates. Such a rotation restricting structure has the following drawbacks: the number of parts is large, the assembly is troublesome, and the structures such as the locking plate, the adjusting gear and the like are easy to damage due to stress; in addition, since the angular range adjustment is realized by the meshing engagement of the locking plate and the gear, it corresponds to a stepped adjustment, i.e. only the adjustment from the current gear to the next gear (corresponding to the locking plate entering the next gear from the current gear slot) is possible, and it is still difficult to finely match the needs of different users.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the utility model provides an adjustable brace hinge which is simple in structure and can realize stepless adjustment of the limiting angle.

The utility model provides a spacing adjustable brace hinge, which is arranged in a knee joint brace and is characterized by comprising: the crus connecting part is connected with the crus bracket of the knee joint brace; the thigh connecting part is connected with a thigh bracket of the knee joint brace; the two ends of the connecting rod piece are respectively hinged on the shank connecting part and the thigh connecting part; the outer cover is hinged with the shank connecting part and the thigh connecting part respectively; and the limiting adjusting piece is inserted into the outer cover, the inner side end of the limiting adjusting piece is abutted against the shank connecting part or the thigh connecting part when the shank connecting part and the thigh connecting part are extended, so that the maximum extending angle between the shank connecting part and the thigh connecting part is limited, and the limiting adjusting piece is positioned at the position close to the rear side of the outer cover.

The limit adjustable brace hinge provided by the utility model is also characterized in that the limit adjusting piece is a bolt, a threaded through hole matched with the bolt is arranged in the outer cover, and the limit adjusting piece is inserted into the outer cover through threaded screwing and screwed in or out through threaded screwing so as to adjust the position of the end part of the inner side and further adjust the maximum extension angle.

Furthermore, the outer cover can be further provided with a limiting part mounting base, and a threaded through hole is formed in the limiting part mounting base.

The limit adjustable brace hinge provided by the utility model also has the technical characteristics that: the stop pin is used for limiting the maximum buckling angle between the shank connecting part and the thigh connecting part by inserting different stop pin holes into the stop pin to abut against the shank connecting part.

The utility model also provides a knee joint brace, which is characterized by comprising: a thigh support to be worn on a thigh; a lower leg support to be worn on the lower leg; and a limit adjustable brace hinge arranged between the thigh support and the shank support, wherein the limit adjustable brace hinge is any one of the above limit adjustable brace hinges.

Utility model with the functions and effects

According to the adjusting hinge and the knee joint brace provided by the utility model, two ends of the connecting rod piece are respectively hinged on the thigh connecting part and the shank connecting part, the outer cover is respectively hinged with the thigh connecting part and the shank connecting part, a four-bar structure is formed, the limiting adjusting piece is inserted into the outer cover, and the inner end part of the limiting adjusting piece can be abutted against the shank connecting part so as to limit the maximum extending angle.

Drawings

FIG. 1 is a schematic view of a knee brace according to a first embodiment of the present invention;

FIG. 2 is a side view of the adjusting hinge according to the first embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of the adjustment hinge according to the first embodiment of the present invention;

FIG. 4A is a schematic view of an adjustment hinge according to a first embodiment of the present invention, when a leg of a user extends to a leg angle of 110 °;

FIG. 4B is a schematic view of the adjustment hinge according to the first embodiment of the present invention when the leg of the user is extended to have a leg angle of 130 °;

FIG. 4C is a schematic view of the adjustment hinge according to the first embodiment of the present invention in a state where the leg of the user is extended to have a leg angle of 160 °;

FIG. 4D is a schematic view of the adjustment hinge according to the first embodiment of the present invention in a state where the leg of the user is extended to have a leg angle of 170 °;

FIG. 4E is a schematic view of the adjustment hinge according to the first embodiment of the present invention when the leg of the user is extended to have a leg angle of 180 °;

FIG. 5 is a schematic view of an angle limit adjustment of an adjustment hinge according to a first embodiment of the present invention;

FIG. 6 is an exploded view of a connection hinge according to a first embodiment of the present invention;

FIG. 7 is a schematic structural view of an adjusting hinge according to a second embodiment of the present invention;

fig. 8A is a schematic view of the adjustment principle of the second embodiment of the present invention in which the flexion angle is limited to 0 °;

fig. 8B is an adjustment principle diagram of the second embodiment of the present invention in which the bending angle is limited to 30 °;

fig. 8C is an adjustment principle diagram of the second embodiment of the present invention in which the bending angle is limited to 60 °;

fig. 8D is an adjustment principle diagram of the second embodiment of the present invention in which the bending angle is limited to 90 °.

Reference numerals: 100-knee brace; 10-thigh support; 11-thigh branches; 12-thigh support; 13-thigh strap; 14-an elastic band; 20-a lower leg support; 21-calf branch; 22-calf support; 23-calf strap; 24-a flexible band; 30-a connecting portion; 31-adjusting the hinge; 311-thigh link; 312-shank junction; 313-an outer cover; 3131-an adjuster mount; 3132A, 3132B, 3132C, 3132D-stop pin holes; 314-a link member; 315-limit adjustment; 3151-an inner end; 316-first hinge axis; 317-a second hinge shaft; 318-third hinge axis; 319-fourth hinge axis; 32-a connecting hinge; 321-a first hinge part; 322-a second hinge part; 323-first pin; 324-a second pin; 33-stop pin.

Detailed Description

The following describes a specific embodiment of the knee joint brace according to the present invention with reference to the drawings and examples. In the following description, the descriptions of the front, back, up, down, etc. directions are based on the direction of the user wearing the knee brace, wherein the direction in which the user faces is the front, and vice versa.

< example one >

Fig. 1 is a structural view of a knee joint brace according to a first embodiment of the present invention.

As shown in fig. 1, the knee brace 100 of the present embodiment includes a thigh brace 10, a lower leg brace 20, and a connecting portion 30 provided between the thigh brace 10 and the lower leg brace 20.

The thigh support 10 is worn on the thigh of the user in use, and includes a thigh support 11, a thigh support 12, a thigh strap 13, and an elastic band 14.

The number of the thigh branches 11 is two, and each thigh branch 11 is sheet-shaped and is arranged approximately along the up-down direction.

The thigh support 12 is strip-shaped, and two ends of the thigh support are respectively fixedly connected with the upper ends of the two thigh supporting strips 11 and are formed into a whole; the number of the thigh straps 13 is two, and both ends of each thigh strap 13 are detachably connected to the thigh brace 11 through strap buckles respectively. The number of the elastic bands 14 is one, and both ends of the elastic bands are respectively fixed at the lower end positions of the two thigh branches 11.

The lower leg support 20 includes a lower leg brace 21, a lower leg support 22, a lower leg strap 23, and a flexible band 24.

The number of the shank branches 21 is two, each shank branch 21 is sheet-shaped, corresponds to two thigh branches respectively, and extends approximately along the up-down direction; the shank support 22 is strip-shaped, and two ends of the shank support are respectively fixedly connected with the upper ends of the two small push supporting bars 21 to form a whole. The number of the calf bandage 23 is two, the two calf bandages 23 are positioned at the rear side, and two ends of each calf bandage 23 are detachably connected to the two calf branches 21 through bandage buckles. The flexible band 24 is a flexible band-shaped member (e.g., canvas belt or the like) having no elasticity, and both ends thereof are fixedly connected to the lower ends of the two lower leg struts 21, respectively.

The number of the connecting parts 30 is two, and each connecting part 30 comprises a limit adjustable brace hinge 31 and a connecting hinge 32. For convenience of description, the position-limiting adjustable brace hinge 31 is simply referred to as an adjusting hinge 31 hereinafter.

Fig. 2 is a side view structural view of an adjustment hinge according to a first embodiment of the present invention. Fig. 3 is a schematic view of the internal structure of the adjustment hinge according to the first embodiment of the present invention. In fig. 3, the internal structure that is not visible from the outside is shown by a broken line.

As shown in fig. 2 and 3, the adjustment hinge 31 includes a thigh link portion 311, a shank link portion 312, an outer cover 313, a link member 314, and a limit adjustment member 315.

The lower leg connecting portion 312 is integrally formed with the upper end of the lower leg strut 21, and the thigh connecting portion 311 is connected to the lower end of the thigh strut 11 via the connecting hinge 32.

The outer cover 313 is formed by two cover sheets with the same shape, which are fastened together, and thus has a cavity structure inside. The upper end of the lower leg link 312 is hinged at a lower position inside the outer cover 313 by a first hinge shaft 316, and the lower end of the thigh link 311 is hinged at an upper position inside the outer cover 313 by a second hinge shaft 317.

The link member 314 is located in the outer cover 313, and has one end hinged to the lower leg link 312 via a third hinge 318 and the other end hinged to the upper leg link 311 via a fourth hinge 319.

As described above, the lower leg link 312, the upper leg link 311, the outer cover 313 and the link 314 are hinged to each other, and actually constitute a four-bar linkage. Such a four-bar linkage allows for arbitrary rotation between the lower leg link 312 and the thigh link 311 when not affected by external forces.

The spacing adjustment member 315 is insertedly disposed within the outer cover 313. Specifically, an adjusting piece mounting seat 3131 is formed at one side of the outer cover 313 in a protruding manner, and the adjusting piece mounting seat 3131 is provided with a threaded through hole penetrating through the outer cover 313; the spacing adjustment member 315 is a bolt that is threaded through the threaded through hole and thereby passes through the outer cover 313 and into the cavity within the outer cover 313. In addition, the remaining portion of the spacing adjuster 315 remains exposed outside the outer cover 313, and the position of the inner end 3151 of the spacing adjuster 315 within the outer cover 313 can be adjusted by rotating the exposed portion to screw in or out the spacing adjuster 315.

Fig. 4A is a schematic view of an adjustment hinge according to a first embodiment of the present invention in a state where a leg of a user extends to a leg angle of 110 °, fig. 4B is a schematic view of an adjustment hinge according to a first embodiment of the present invention in a state where a leg of a user extends to a leg angle of 130 °, fig. 4C is a schematic view of an adjustment hinge according to a first embodiment of the present invention in a state where a leg of a user extends to a leg angle of 160 °, fig. 4D is a schematic view of an adjustment hinge according to a first embodiment of the present invention in a state where a leg of a user extends to a leg angle of 170 °, and fig. 4E is a schematic view of an adjustment hinge according to a first embodiment of the present invention in a state where a leg of a user extends to a leg angle of 180 °. In fig. 4A to 4E, the regulator mounting block 3131 and the portion of the spacing regulator 315 located at the outside are omitted for clarity of the structure, while the structure not seen from the outside is still shown by solid lines.

As shown in fig. 4A, in the state where the user's leg is flexed, since the adjuster mount 3131 is located at a position closer to the rear side of the outer cover 313, even if the stopper adjuster 315 is inserted into the outer cover 313 through the adjuster mount 3131, the inner end 3151 thereof does not obstruct the movement of the lower leg link 312 or the thigh link 311, and accordingly, the lower leg link 312, the thigh link 311, and the outer cover 315 are freely rotatable, so that the angle between the lower leg link 312 and the thigh link 311 can be changed. Therefore, the user can freely stretch the legs, so that the included angle between the thigh and the shank is gradually increased.

When the maximum extension is reached (i.e. the angle between the thigh and the calf is about 180 °), the inner end 3151 of the spacing adjustment member 315 abuts against the rear side edge of the calf connecting portion 312, so that the outer cover 315 cannot rotate any further relative to the calf connecting portion 312, as shown in fig. 4E; at this time, the thigh link 311 cannot rotate relative to the shank link 312 any more under the combined restriction of the link 314 and the outer cover 313, that is, the included angle between the thigh link 311 and the shank link 312 is limited to the maximum extension angle of 180 °; accordingly, this angle is also the maximum angle that the user's leg can reach for extension.

Fig. 5 is an angle limit adjustment schematic diagram of an adjustment hinge according to a first embodiment of the present invention, and fig. 5 shows a state where a maximum extension angle is limited to about 170 °, omitting an adjustment member mounting block 3131 and a portion of a limit adjustment member 315 located at the outside, while a structure that is not seen from the outside is still shown by a solid line.

When the user desires to adjust the maximum extension angle, the exposed portion of the spacing adjustment member 315 may be rotated, as shown in fig. 5, to screw the spacing adjustment member 315 into a position in which its inner end 3151 is more inward. In this case, when the user extends the leg, the inner end 3151 abuts the lower leg link portion when the extension angle has not reached 180 ° (about 170 ° in fig. 5), and the thigh link portion 311 and the lower leg link portion 312 are restricted from further rotation, that is, the maximum extension angle is adjusted to 170 °. In addition, since the link 314 and the stopper adjuster 315 of the present embodiment are offset from each other in the left-right direction (i.e., the direction perpendicular to the paper surface in fig. 5), the stopper adjuster 315 does not contact the link 314 and the effect of abutting against the lower leg link 312 is not affected.

Fig. 6 is an exploded view of a connection hinge according to a first embodiment of the present invention.

As shown in fig. 6, the connection hinge 32 of the present embodiment includes a first hinge portion 321, a second hinge portion 322, a first pin 323, and a second pin 324.

The first hinge portion 321 is fixed at the lower end of the thigh branch 11, the second hinge portion 322 is rotatably connected to the upper end of the thigh link portion 311 by the second pin 324, and the first hinge portion 321 and the second hinge portion 322 are rotatably connected by the first pin 323. The first pin 323 and the second pin 324 have different length directions, so that the connecting hinge 32 allows the thigh brace 11 and the thigh link 311 to rotate relative to each other about the first pin 323 (i.e., C-D axis) and also about the second pin 324 (i.e., a-B axis), i.e., the connecting hinge 32 is a two-degree-of-freedom hinge. The hinge 32 allows the thigh support 10 and the shank support 20 to accommodate the flexion and extension movements of the user's leg and the internal and external rotation movements of the knee joint, and the operation principle and effect thereof are the same as those described in the patent CN106535833A previously filed by the inventor, and will not be described herein again.

The working principle of the knee joint brace of the present embodiment is described below with reference to the drawings.

When the user wears the thigh support 10 and the shank support 20 on the thigh and the shank respectively, the position of the inner end 3151 of the thigh support can be changed by rotating the limit adjusting piece 315, and the adjustment of the maximum extending angle can be realized. In addition, during the use process, the user can rotate the limit adjusting member 315 at any time, so as to adjust the maximum extending angle to the most suitable angle.

Effects and effects of the embodiments

According to regulation hinge and knee joint brace that this embodiment provided, because connecting rod spare both ends articulate respectively on thigh connecting portion and shank connecting portion, the enclosing cover is articulated with thigh connecting portion and shank connecting portion respectively, four-bar linkage structure has been constituted, and spacing regulating part inserts and sets up in the enclosing cover, thereby its inside end can butt shank connecting portion restriction maximum extension angle, consequently, the regulation hinge of this embodiment can just realize the restriction of maximum extension angle with less part quantity, simple assembly relation, it is simple and not fragile to make.

Furthermore, because the limiting adjusting piece is a bolt, and the adjusting piece mounting seat of the outer cover is provided with a threaded through hole matched with the bolt, the position of the end part of the inner side of the limiting adjusting piece can be changed by screwing in or screwing out the limiting adjusting piece, so that the maximum extending angle can be adjusted. On one hand, the adjustment can be realized only by screwing the bolt, so the operation is simple; on the other hand, because the precession screw-out degree of bolt does not have the fender position and changes, the user can be according to the demand with the biggest extension angle regulation to arbitrary angle, promptly, can realize infinitely variable control.

< example two >

The second embodiment is different from the first embodiment mainly in that the limitation and adjustment of the bending angle can be realized; in this embodiment, the same structures as those in the first embodiment are given the same reference numerals, and the same descriptions are omitted.

Fig. 7 is a schematic structural view of an adjustment hinge according to a second embodiment of the present invention.

As shown in fig. 7, compared to the first embodiment, the adjusting hinge 31 of the present embodiment further has a stopper pin 33, and the outer lid 313 is further provided with a plurality of stopper pin holes 3132, each stopper pin hole 3132 being formed through both lid sheets of the outer lid 313 and having a diameter matched to the stopper pin 33 such that the stopper pin 33 can be inserted into each stopper pin hole 3132 to penetrate inside the outer lid 313.

The number of the limiting pin holes 3132 of the present embodiment is 4 in total, and for convenience of description, the number is respectively identified as 3132A, 3132B, 3132C, 3132D; the stopper pin holes 3132A are provided near the front side edge of the outer cover 313, and the stopper pin holes 3132A, 3132B, 3132C, 3132D are sequentially distributed substantially in the front-to-rear direction.

FIG. 8A is a schematic view of an adjustment principle of a second embodiment of the present invention in which the flexion angle is limited to 0 °, FIG. 8B is a schematic view of an adjustment principle of a second embodiment of the present invention in which the flexion angle is limited to 30 °, FIG. 8C is a schematic view of an adjustment principle of a second embodiment of the present invention in which the flexion angle is limited to 60 °, and FIG. 8D is a schematic view of an adjustment principle of a second embodiment of the present invention in which the flexion angle is limited to 90 °

As shown in fig. 8A, when the stopper pin 33 is inserted into the rearmost stopper pin hole 3132D, since the stopper pin 33 penetrates the outer lid 33 in this state, it can abut against the lower leg link 312, so that the outer lid 33 cannot rotate backward with respect to the lower leg link 312, and further the thigh link 311 cannot rotate backward with respect to the lower leg link 312, that is, buckling between the thigh link 311 and the lower leg link 312 is not allowed, and the buckling angle is restricted to 0 °.

As shown in fig. 8B, when the stop pin 33 is inserted into the front stop pin hole 3132B, and the thigh link 311 is rotated backward by a certain angle with respect to the lower leg link 312, the stop pin 33 abuts against the lower leg link 312, so that the thigh link 311 can not be rotated backward with respect to the lower leg link 312 any more, and the flexion angle is limited to 30 °.

Similarly, as shown in fig. 8C and 8D, when the stop pins 33 are inserted into the stopper pin holes 3132C and 3132D, respectively, the thigh link portions 311 will be restricted after being rotated backward by a certain angle, so that the flexion angle is restricted to 60 ° and 90 °, respectively.

As described above, in the present embodiment, since the adjustment hinge 31 further includes the stopper pin 33, and the outer cover 33 further includes the plurality of stopper pin holes 3132, the stopper pin 33 is inserted into the different stopper pin holes 3132, so that the bending angle, that is, the maximum bending angle can be restricted by bringing the stopper pin 33 into contact with the lower leg link 312 after the thigh link 311 is rotated backward by a certain angle. Therefore, compared with the first embodiment, the knee joint brace of the first embodiment can further realize the limitation and adjustment of the maximum flexion angle while realizing the limitation and adjustment of the maximum extension angle, and can better adapt to the requirements of different users.

The above embodiments are provided to illustrate specific embodiments of the present invention, and the knee brace of the present invention is not limited to the forms described in the above embodiments.

The shank connecting part and the shank supporting strip are integrally formed, and the thigh connecting part is connected with the thigh supporting strip through a two-degree-of-freedom connecting hinge. However, the shank connecting part and the thigh connecting part in the utility model can be connected with the shank supporting strip and the thigh supporting strip in other ways. For example, as an alternative, the shank link of the present invention may be connected to the thigh branch via a connecting hinge, and the thigh link is integrally formed with the thigh branch; as another alternative, the lower leg link may be integrally formed with the lower leg strut, while the thigh link is integrally formed with the thigh strut.

In an embodiment, the limiting adjusting member is a bolt, and the limiting member mounting base has a threaded through hole matched with the limiting member mounting base. In the present invention, the limit adjusting member may be another member that can be inserted into the outer cover and abut against the lower leg connecting portion, for example, an insertion rod member having a plurality of limit holes in a longitudinal direction may be used, a plug pin that can pass through the limit holes may be provided at the limit member mounting seat, and the maximum extension angle may be adjusted by changing a position of the inner end portion by changing the limit hole into which the plug pin is inserted. The mode of the inserted link bolt matching can not realize stepless adjustment, but still has simple structure and easy manufacture.

In the embodiment, the outer cover is formed by buckling two cover plates with the same shape, and in the utility model, the outer cover can also be manufactured in an integral forming mode as long as corresponding cavities are reserved.

Claims (5)

1. The utility model provides a spacing adjustable type brace hinge, sets up in knee joint brace, its characterized in that includes:

the lower leg connecting part is connected with the lower leg bracket of the knee joint brace;

a thigh connecting part connected with a thigh bracket of the knee joint brace;

the two ends of the connecting rod piece are respectively hinged on the shank connecting part and the thigh connecting part;

the outer cover is hinged with the shank connecting part and the thigh connecting part respectively; and

a limit adjusting piece inserted into the outer cover, the inner end of the limit adjusting piece is abutted against the shank connecting part or the thigh connecting part when the shank connecting part and the thigh connecting part extend, so as to limit the maximum extending angle between the shank connecting part and the thigh connecting part,

wherein the limit adjusting piece is located at a position close to the rear side of the outer cover.

2. The adjustable limit brace hinge of claim 1, wherein:

wherein the limit adjusting piece is a bolt,

the outer cover is internally provided with a threaded through hole matched with the bolt, and the limiting adjusting piece is inserted into the outer cover through threaded screwing and screwed in or out through the threaded screwing so as to adjust the position of the end part of the inner side and further adjust the maximum extension angle.

3. The adjustable limit brace hinge of claim 2, wherein:

the outer cover is provided with a limiting part mounting base, and the limiting part mounting base is internally provided with the threaded through hole.

4. The adjustable limit brace hinge of claim 1, further comprising:

a stop pin is arranged on the outer side of the shell,

the outer cover is provided with a plurality of limiting holes on the surface, and the stop pin is inserted into different limiting holes to abut against the shank connecting part so as to limit the maximum buckling angle between the shank connecting part and the thigh connecting part.

5. A knee brace, comprising:

a thigh support to be worn on a thigh;

a lower leg support to be worn on the lower leg; and

a limit adjustable brace hinge arranged between the thigh support and the shank support,

wherein the adjustable limit brace hinge is the adjustable limit brace hinge of any one of claims 1-4.

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