CN114948390A - Knee joint hyperextension correcting device - Google Patents

Abstract

The invention discloses a knee joint hyperextension correcting device, which comprises a thigh fixing piece and a shank fixing piece, the inner side surfaces of the thigh fixing part and the shank fixing part are respectively connected with an upper connecting frame and a lower connecting frame, the bottom end of the upper connecting frame is rotatably connected with the top end of the lower connecting frame through a rotating shaft, an adjustable locking mechanism is connected between the upper connecting frame and the lower connecting frame, the adjustable locking mechanism comprises a mounting disc fixed at the top end of the lower connecting frame and a limiting disc fixed at the bottom end of the upper connecting frame, the mounting disc is rotationally connected with the limiting disc through a rotating shaft, the circumferential side surface of the limiting disc is provided with a limiting ratchet, a pawl is hinged to an area, corresponding to the limiting ratchet, on the outer side surface of the mounting disc, a reset mechanism is connected between the pawl and the mounting disc, and an automatic unlocking mechanism is adjustably connected to the outer side of the limiting ratchet on the limiting disc; the knee joint hyperextension correcting device is reasonable in structural design, adjustable in knee joint hyperextension correcting angle range and high in use comfort.

Description

A knee joint hyperextension correction device

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a knee joint hyperextension correction device.

Background technique

Knee hyperextension is also known as knee opistonia. During the process of walking and standing, the affected side of the lower extremity appears overextension of the knee joint during the support period, the center of gravity of the body shifts back, the affected side hip is excessively flexed, and the body tends to lean back. Long-term hyperextension of the knee joint can significantly increase the incidence of bone and joint degeneration, cause excessive wear of the knee joint, cause joint deformity, and significantly increase the incidence of bone and joint degeneration. The hyperextension angle of the orthopedic device is mostly 5°-10°, and its angle is relatively fixed and cannot be adjusted. For patients with obese lower limbs or less uniform body, the hyperextension angle of the orthopedic device is not reasonable and normal. Within the range of the knee joint, it cannot even be in a fully straightened state. In severe cases, it may lead to partial loss of the straightening function, poor correction effect and low comfort; therefore, to provide a knee joint hyperextension correction angle with a reasonable range of adjustment. , It is very necessary to use a knee hyperextension correction device with high comfort.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a knee joint hyperextension correction device in view of the deficiencies of the prior art, which has a reasonable structure design, adjustable knee joint hyperextension correction angle range, and high comfort in use.

The purpose of the present invention is to achieve this: a knee joint hyperextension correction device, comprising a thigh fixing piece and a calf fixing piece, the inner surfaces of the thigh fixing piece and the calf fixing piece are respectively connected with an upper connecting frame and a lower connecting frame , the bottom end of the upper connecting frame and the top end of the lower connecting frame are rotatably connected by a rotating shaft, an adjustable locking mechanism is connected between the upper connecting frame and the lower connecting frame, and the adjustable locking mechanism includes a fixed connection on the lower connecting frame. The installation plate at the top of the frame and the limit plate fixed on the bottom end of the upper connecting frame, the installation plate and the limit plate are connected by rotation through the rotating shaft, and the limit ratchet teeth are arranged on the circumferential side of the limit plate. The area corresponding to the limit ratchet on the outer side of the disk is hinged with a pawl, a reset mechanism is connected between the pawl and the mounting plate, and the outer side of the upper limit ratchet of the limit plate is adjustable and connected with an automatic Unlock mechanism.

Further, the thigh fixing piece and the calf fixing piece have the same structure, which includes an arc-shaped elastic plate fixed with the upper connecting frame or the lower connecting frame and a belt fixedly connected with the arc-shaped elastic plate at one end, and the other side of the belt is fixed. One end is fixedly connected to the other side of the arc-shaped elastic plate in an adjustable way, and the fixed connection between the hard arc-shaped elastic plate and the connecting frame can avoid the relative relationship caused by the direct fixing of the soft strap and the connecting frame. Shake problem, to ensure the corrective effect of the knee joint.

Further, the upper connecting frame and the lower connecting frame have the same structure, and both of them adopt a telescopic connection structure, so that it can not only be suitable for the use requirements of people of different heights, but also can be freely retracted during the knee flexion and knee straightening process. Improve the comfort of use.

Further, the telescopic connection structure includes a rectangular sleeve that is fixedly connected to the thigh fixing piece or the calf fixing piece and a rectangular inner rod that is fixedly connected to the limit plate or the mounting plate. The rectangular inner rod is slidably arranged on the rectangular sleeve. Inside the tube, limit grooves are evenly distributed on the side of the rectangular inner rod, and the limit rod slides up and down in the limit groove, and the limit rod is fixedly connected to the limit groove on the inner side of the rectangular sleeve. , Through the cooperation of the limit rod and the limit slot, the relative shaking of the rectangular inner rod and the rectangular sleeve can be effectively prevented, thereby ensuring the corrective effect on the knee joint.

Further, the reset mechanism is a torsion spring or a reset spring connected at the hinged position of the pawl and the mounting plate, so as to ensure the locking effect of the pawl on the upper ratchet teeth of the limit plate.

Further, the automatic unlocking mechanism includes a rotating frame connected to the rotating shaft, the movable end of the rotating frame is connected with a protective unlocking plate, one end of the protective unlocking plate abuts on the pawl, and the rotating frame is It is connected with the limit plate through a locking mechanism, and the hyperextension angle of the knee joint can be adjusted as required by adjusting the relative angle between the rotating frame and the limit plate.

Further, a scale value is provided on the limit disk, which is convenient for adjusting the relative angle between the rotating frame and the limit disk.

Further, the locking mechanism includes a guide groove provided on the limit plate, a sliding guide block provided in the guide groove, the outer end of the guide block is fixedly connected with a locking bolt, and the locking bolt passes through the guide block. The limit hole on the rotating frame is connected with the locking nut. After loosening the locking nut, the rotating frame can be driven to rotate relative to the limit plate through the locking bolt, and then the locking nut is tightened to fix the limit plate and the rotating frame.

Further, a roller is provided on the side of the movable end of the pawl facing the protection and unlocking plate. During the knee bending process, the pawl and the protection and unlocking plate are relatively slidingly connected by the roller to avoid the movable end of the pawl and the protection and unlocking plate. The surface is in direct contact with friction.

Further, a protective cover is sleeved on the outside of the installation plate, and the protective cover includes a cylindrical protective cover rotatably connected with the installation plate. It is arranged in the rectangular hole, and a cover body is detachably connected to the end of the cylindrical protective cover away from the mounting plate to prevent accidental contact with the adjustable locking mechanism.

Beneficial effects of the present invention:

1. The present invention can adjust and fix the maximum rotation angle between the upper connecting frame and the lower connecting frame through the adjustable locking mechanism, so as to adjust and correct the maximum hyperextension angle of the knee joint according to the needs of different people;

2. The upper connecting frame and the lower connecting frame in the present invention respectively adopt a retractable structure, which can not only meet the needs of different people's habits, heights, etc., but also can be freely retracted during the knee flexion and knee straightening process, so as to improve the use efficiency. comfort.

Description of drawings

FIG. 1 is a schematic structural diagram of a knee joint hyperextension correction device according to the present invention.

2 is a schematic diagram of the internal structure of an adjustable locking mechanism in a knee joint hyperextension correction device of the present invention.

3 is a schematic structural diagram of the adjustable locking mechanism in a knee joint hyperextension correction device of the present invention after removing the rotating frame.

4 is a schematic structural diagram of a thigh fixing member or a calf fixing member in a knee joint hyperextension correction device of the present invention.

5 is a schematic structural diagram of an upper connecting frame or a lower connecting frame in a knee joint hyperextension correction device of the present invention.

In the figure: 1. Thigh fixing part 2, calf fixing part 3, upper connecting frame 4, lower connecting frame 5, rotating shaft 6, cover 7, mounting plate 8, limit plate 9, limit ratchet 10, pawl 11 , torsion spring 12, rotating frame 13, scale value 14, locking bolt 15, locking nut 16, cylindrical protective cover 17, rectangular hole 18, protective unlocking plate 19, guide groove 20, guide block 21, roller 22, arc The elastic plate 23, the strap 24, the rectangular sleeve 25, the rectangular inner rod 26, the limit groove 27, and the limit rod.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention.

Example 1

As shown in Figures 1 and 4, a knee joint hyperextension correction device includes a thigh fixing member 1 and a calf fixing member 2, and the inner surfaces of the thigh fixing member 1 and the calf fixing member 2 are respectively connected with an upper connecting frame 3 and the lower connecting frame 4, the thigh fixing part 3 and the calf fixing part 4 are composed of an arc-shaped elastic plate 22 and a belt 23, one end of the belt 23 is fixedly connected with the arc-shaped elastic plate 22, and the other end is adjustable. It is fixedly connected with the other side of the arc-shaped elastic plate 22. When in use, the arc-shaped elastic plate 22 is put on the outer side of the thigh or calf, and then the strap 23 is tightened to fix the upper connecting frame 3 and the lower connecting frame 4 respectively. on the outside of the thigh and calf.

As shown in FIG. 5 , the upper connecting frame 3 and the lower connecting frame 4 adopt telescopic connection structure, so that it can not only be suitable for the use needs of people of different heights, but also can be freely retracted during the process of knee flexion and knee straightening , to improve the comfort of use; the telescopic connection structure includes a rectangular sleeve 24 fixedly connected with the thigh fixing member 1 or the calf fixing member 2 and a rectangular inner rod 25 fixedly connected with the limit plate 8 or the mounting plate 7, so The rectangular inner rod 25 is slidably arranged inside the rectangular sleeve 24, the limit grooves 26 are evenly distributed on the side surface of the rectangular inner rod 25, and the limit rod 27 is slid up and down in the limit groove 26. The position rod 27 is fixedly connected in the limit groove 26 on the inner side of the rectangular sleeve 24. Through the cooperation between the limit rod 27 and the limit groove 26, the relative shaking of the rectangular inner rod 25 and the rectangular sleeve 24 can be effectively prevented, thereby ensuring Its corrective effect on the knee joint.

As shown in FIG. 2 and FIG. 3 , an adjustable locking mechanism is connected between the upper connecting frame 3 and the lower connecting frame 4 , and the adjustable locking mechanism includes a mounting plate 7 fixed on the top of the lower connecting frame 4 and a fixed locking mechanism. On the limit disk 8 at the bottom end of the upper connecting frame 3, the mounting disk 7 and the limit disk 8 are connected in rotation through the rotating shaft 5, and the limit ratchet 9 is provided on the circumferential side of the limit disk 8. A pawl 10 is hinged on the outer side of the disk 7 in the area corresponding to the limit ratchet 9 , the pawl 10 is hinged with the torsion spring 11 at the hinged position of the mounting plate 7 , and the torsion spring 11 can make the pawl 10 move. The end abuts in a certain limit ratchet 9, so as to prevent the angle between the upper connecting frame 3 and the lower connecting frame 4 from exceeding a certain value and continue to rotate forward, thereby effectively preventing the knee joint from hyperextension; the limit plate 8. The outer side of the upper limit ratchet 9 is connected with an automatic unlocking mechanism, through which the automatic locking mechanism can release the locking effect of the pawl 10 on the limit ratchet 9 during the process of bending the knee and standing up, ensuring that the user can reasonably Squat and stand normally within the range; the automatic unlocking mechanism includes a rotating rotating frame 12 connected to the rotating shaft 5, the movable end of the rotating frame 12 is connected with a protective unlocking plate 18, and one end of the protective unlocking plate 18 touches Relying on the pawl 10, the rotating frame 12 and the limit disk 8 are connected by a locking mechanism, and the protection unlocking plate 18 can be driven to rotate relative to the limiting disk 8 by the rotating frame 12, and the protection unlocking plate 18 is opposite to the limit plate 8. The larger the coverage of the ratchet teeth 9 is, the larger the maximum rotation angle between the upper connecting frame 3 and the lower connecting frame 4 is. The limit plate 8 is provided with a scale value 13. After being fixed at a certain scale position on the limit plate 8, when the user bends his knees, the left end of the protection unlocking plate 18 pushes the pawl 10 to reversely rotate against the force of the torsion spring 11 to release its effect on the limit ratchet 9. After that, the movable end of the pawl 10 slides along the lower surface of the protection unlocking plate 18, and when the user gets up after bending his knees, the movable end of the pawl 10 slides relatively oppositely along the lower surface of the protection unlocking plate 18. , until it is clamped in the first limit ratchet 9 outside the protection unlocking plate 18 to effectively prevent the knee joint from hyperextension. Avoid direct contact and friction between the movable end of the pawl 10 and the outer surface of the protective unlocking plate 18 .

The locking mechanism includes a guide groove 19 provided on the limit plate 8, a sliding guide block 20 provided in the guide groove 19, and a locking bolt 14 is fixedly connected to the outer end of the guide block 20. The tightening bolt 14 is connected to the locking nut 15 through the limit hole on the rotating frame 12. After loosening the locking nut 15, the rotating frame 12 can be driven to rotate relative to the limiting plate 8 through the locking bolt 14, and then the locking nut 15 is tightened. The limit plate 8 and the rotating frame 12 are fixed.

A protective cover is sleeved on the outside of the mounting plate 7 , and the protective cover includes a cylindrical protective cover 16 rotatably connected with the mounting plate 7 . The top of the cylindrical protective cover 16 is provided with a rectangular hole 17 . The frame 3 is clamped in the rectangular hole 17, and the cover body 6 is detachably connected to the end of the cylindrical protective cover 16 away from the mounting plate 7 to prevent accidental contact with the adjustable locking mechanism.

Unless otherwise defined, technical or scientific terms used herein should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of words like "a" or "an" in the specification and claims of this application also does not necessarily imply a quantitative limitation. "Comprising" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. "Connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Exemplary embodiments of the present invention have been described in detail above with reference to the preferred embodiments, however, those skilled in the art will appreciate that various modifications and variations can be made to the above-mentioned specific embodiments without departing from the concept of the present invention. Modifications can be made, and various combinations of the technical features and structures proposed in the present invention can be made without exceeding the protection scope of the present invention.

Claims (10)

1. The utility model provides a knee joint hyperextension orthotic devices, includes thigh mounting (1) and shank mounting (2), its characterized in that: the thigh fixing piece (1) and the shank fixing piece (2) are respectively connected with an upper connecting frame (3) and a lower connecting frame (4) on the inner side surfaces, the bottom end of the upper connecting frame (3) is rotatably connected with the top end of the lower connecting frame (4) through a rotating shaft (5), an adjustable locking mechanism is connected between the upper connecting frame (3) and the lower connecting frame (4), the adjustable locking mechanism comprises a mounting disc (7) fixed at the top end of the lower connecting frame (4) and a limiting disc (8) fixed at the bottom end of the upper connecting frame (3), the mounting disc (7) is rotatably connected with the limiting disc (8) through the rotating shaft (5), limiting ratchets (9) are arranged on the circumferential side surface of the limiting disc (8), a pawl (10) is hinged to a region corresponding to the limiting ratchets (9) on the outer side surface of the mounting disc (7), and a resetting mechanism is connected between the pawl (10) and the mounting disc (7), the outer side of the limiting ratchet on the limiting disc is adjustably connected with an automatic unlocking mechanism.

2. The device of claim 1, wherein the device further comprises: thigh mounting (1) and shank mounting (2) structure are the same, and it includes arc elastic plate (22) and band (23) of one end and arc elastic plate (22) fixed connection with last link (3) or lower link (4), the other end of band (23) is through the opposite side fixed connection of adjustable mode and arc elastic plate (22).

3. The device of claim 1, wherein: the upper connecting frame (3) and the lower connecting frame (4) are identical in structure and both adopt telescopic connecting structures.

4. A knee hyperextension orthosis according to claim 3, wherein: telescopic connection structure include with thigh mounting (1) or shank mounting (2) fixed connection's rectangle sleeve pipe (24) and with spacing dish (8) or mounting disc (7) fixed connection's pole (25) in the rectangle, the gliding setting of pole (25) is inside rectangle sleeve pipe (24) in the rectangle, evenly distributed has spacing groove (26) on the side of pole (25) in the rectangle, gliding being connected with gag lever post (27) from top to bottom in spacing groove (26), gag lever post (27) fixed connection is on spacing groove (26) of the medial surface of rectangle sleeve pipe (24).

5. The device of claim 1, wherein: the reset mechanism is a torsion spring (11) or a reset spring connected to the hinged position of the pawl (10) and the mounting disc (7).

6. The device of claim 1, wherein the device further comprises: the automatic unlocking mechanism comprises a rotating frame (12) connected to the rotating shaft (5) in a rotating mode, a protection unlocking plate (18) is connected to the movable end of the rotating frame (12), one end of the protection unlocking plate (18) is abutted to the pawl (10), and the rotating frame (12) is connected with the limiting disc (8) through a locking mechanism.

7. The device of claim 6, wherein: and the limiting disc (8) is provided with a scale value (13).

8. The device of claim 6, wherein: the locking mechanism comprises a guide groove (19) arranged on the limiting disc (8) and a guide block (20) arranged in the guide groove (19) in a sliding mode, the outer end of the guide block (20) is fixedly connected with a locking bolt (14), and the locking bolt (14) penetrates through a limiting hole in the rotating frame (12) and is connected with a locking nut (15).

9. A knee hyperextension orthosis according to claim 6, 7 or 8, wherein: and a roller (21) is arranged on one side, facing the protective unlocking plate (18), of the movable end of the pawl (10).

10. The device of claim 1, wherein: the outside cover of mounting disc (7) is equipped with the protective cover, the protective cover include with mounting disc (7) between swivelling joint's column protection casing (16), rectangular hole (17) have been seted up on the top of column protection casing (16), it establishes in rectangular hole (17) to go up link (3) card, the one end detachable of keeping away from mounting disc (7) on column protection casing (16) is connected with lid (6).

Images