Ligament reconstruction fixing device

Abstract

The invention relates to the technical field of rehabilitation devices, in particular to a ligament reconstruction fixing device which comprises a thigh fixing sleeve, a shank fixing sleeve and a rotating support, the thigh fixing sleeve is fixedly worn on a thigh, the shank fixing sleeve is fixedly worn on a shank, and the rotating support comprises two pairs of upper supporting rods and lower supporting rods. Two pairs of upper support rods and lower support rods are respectively arranged on the inner and outer sides of the thigh fixing sleeve and the shank fixing sleeve, the upper ends of the upper support rods are fixedly connected with the thigh fixing sleeve, and the lower ends of the lower support rods are fixedly connected with the shank fixing sleeve; the lower ends of the upper supporting rods and the upper ends of the lower supporting rods on the same side achieve rotary sliding composite connection through movable pin shafts. The problems existing in the knee joint rehabilitation process of an existing brace are effectively solved, and the wearing comfort and the rehabilitation effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of rehabilitation equipment, and in particular to a ligament reconstruction fixation device. Background Art

[0002] The main function of wearing a brace after medial knee ligament reconstruction is to protect the knee, prevent inward and outward rotation and excessive extension, and avoid secondary injury. Knee flexion activities can be started early after surgery to avoid affecting recovery due to excessive immobilization. It is usually recommended to achieve a 90-degree bend 4-6 weeks after surgery to avoid difficulties in later rehabilitation. In order to ensure the reconstruction of the medial knee ligament and the patient's early resumption of normal life and work, a brace is usually used to protect the knee, but bending activities are not restricted. Activities within a reasonable range in the early postoperative period can also avoid adhesion and stiffness.

[0003] like Fig.11 As shown, when the human knee joint is bent or extended, the joint surface undergoes a combination of rolling and sliding movements. As the bending range of the knee joint increases, the equivalent rotation center of the knee joint moves from the center of the knee to the front of the knee.

[0004] However, the rotational connection position of the existing braces used after knee ligament reconstruction is mostly a fixed hinge structure. The disadvantage of this structure is that the rotation center of the brace cannot coincide with the rotation center of the knee during knee bending. This misalignment needs to be compensated by squeezing the muscle tissue through the brace. Long-term wearing of this structure will cause severe discomfort and even muscle injury in severe cases.

[0005] Therefore, there is an urgent need for a new type of ligament reconstruction fixation device to provide an effective solution to the defects of the existing technology. Summary of the invention

[0006] The object of the present invention is to provide a ligament reconstruction fixation device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The locking device is configured to lock the locking cam of the locking cam, and the locking cam, disposed on the locking cam's upper and lower ends of the withering teeth of the locking cam, wherein the locking cam is secured to the hinge parts of the locking cam and are provided with a lock on the hinge parts of the locking cam.

[0009] Furthermore, a limit stop rod is provided at the upper end of the lower support rod, and an arc groove is opened at the lower end of the upper support rod. A limit screw is installed in the arc groove. The limit screw cooperates with the limit stop rod to limit the maximum opening and closing angle of the upper support rod and the lower support rod, and the position of the limit screw in the arc groove is movable.

[0010] Furthermore, a nut groove is provided on the back side of the arc groove, a nut is slidably connected in the nut groove, the limit screw rod passes through the arc groove and is threadedly connected to the nut, and the head of the limit screw is pressed on the outer side wall of the upper support rod.

[0011] Furthermore, a parallel outward expansion head is provided at the upper end of the lower support rod, and the parallel outward expansion head is installed on the outer side of the lower end of the upper support rod, and the lower support rod and the inner side wall of the upper support rod are located in the same plane.

[0012] Furthermore, the thigh fixing sleeve and the calf fixing sleeve have the same structure, the calf fixing sleeve is a proportional reduction of the thigh fixing sleeve, the thigh fixing sleeve and the calf fixing sleeve include a fixed semi-circular plate and a rotating semi-circular plate, the outer walls at both ends of the fixed semi-circular plate are respectively provided with a connecting seat and a plug-in seat, the rotating semi-circular plate is rotatably connected to one end of the fixed semi-circular plate provided with the plug-in seat through a rotating shaft, the end of the rotating semi-circular plate is provided with a plug-in belt, the plug-in belt is plug-matched with the plug-in groove in the plug-in seat, and the plug-in seat is provided with a structure for locking the plug-in belt.

[0013] Furthermore, the socket is provided with a threaded hole, the threaded hole is threadedly connected to a locking screw, the outer end of the locking screw extends out of the outer wall of the socket and is provided with a hand-tightening handle, and the inner end of the locking screw extends into the socket slot.

[0014] Furthermore, the inner end of the locking screw extends into the plug-in slot and is rotatably connected to the pressure plate, and resistance-increasing teeth are provided on the inner side wall of the pressure plate.

[0015] Furthermore, both the fixed semicircular arc plate and the rotating semicircular arc plate are provided with air holes.

[0016] Furthermore, an elastic band is connected to the inner wall of the fixed semicircular arc plate, and the elastic band is spirally wound around the thigh or calf, and the end is fixed with Velcro.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can dynamically adjust the support angle and position of the device as the knee joint bends and straightens through the sliding fit and rotation of the movable pin in the strip groove, and the fit of the limit screw and the limit stop rod. The pressure and friction of the brace on the muscles and soft tissues around the knee joint are reduced, thereby improving the wearing comfort. The present invention allows the knee joint to bend and straighten within a reasonable range, which helps to reduce the occurrence of postoperative adhesion and stiffness. At the same time, by limiting the maximum opening and closing angle, discomfort or injury caused by excessive bending can be prevented, providing effective support and protection for rehabilitation after ligament reconstruction. Since the position of the limit screw in the arc groove is movable, the device can be personalized according to the patient's specific situation and rehabilitation needs. The adaptability and flexibility of the device are improved, so that it can better meet the rehabilitation needs of different patients.

[0019] 2. The present invention realizes the stable fixation of the legs and comfortable wearing through the combination of the fixed semicircular arc plate and the rotating semicircular arc plate, the fixing effect of the plug-in belt, the locking mechanism of the locking screw, the fixing effect of the elastic bandage and the design of the ventilation hole. ;

[0020] In summary, the present invention effectively solves the problems existing in the existing brace during the knee joint rehabilitation process, and improves the wearing comfort and rehabilitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a ligament reconstruction fixation device when bent;

[0022] Figure 2 It is a schematic diagram of the structure of a ligament reconstruction fixation device when it is straightened;

[0023] Figure 3 It is a schematic diagram of the structure when the rotating bracket is straightened;

[0024] Figure 4 It is a schematic diagram of the structure of the rotating bracket when it is bent;

[0025] Figure 5 It is a schematic diagram of the structure of the parallel expansion head and the movable pin shaft;

[0026] Figure 6 It is a structural schematic diagram of the connection position between the upper support rod and the support rod;

[0027] Figure 7 It is a structural schematic diagram of a nut slot and a nut;

[0028] Figure 8 It is a schematic diagram of the structure of a thigh fixing sleeve or a calf fixing sleeve;

[0029] Fig. 9 It is a structural schematic diagram of a fixed semicircular plate box and a rotating semicircular plate;

[0030] Fig.10 It is a schematic diagram of the structural decomposition of the socket;

[0031] Fig.11 Schematic diagram of the human knee joint.

[0032] In the figure: 1. rotating bracket; 2. thigh fixing sleeve; 3. calf fixing sleeve; 4. upper support rod; 5. lower support rod; 6. parallel outward expansion head; 7. movable pin shaft; 8. column head; 9. strip notch; 10. column head groove; 11. elastic bandage; 12. nut; 13. fixed semicircular arc plate; 14. rotating semicircular arc plate; 15. ventilation hole; 16. connecting seat; 17. plug-in seat; 18. plug-in groove; 19. threaded hole; 20. pressure plate; 21. resistance-increasing tooth; 23. locking screw; 24. hand twist handle; 25. rotating shaft; 26. plug-in belt; 27. limit stop rod; 28. arc groove; 29. ​​limit screw; 30. nut groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1 to 7A ligament reconstruction fixation device comprises a thigh fixing sleeve 2, a calf fixing sleeve 3 and a rotating bracket 1. The thigh fixing sleeve 2 is fixedly worn on the thigh, and the calf fixing sleeve 3 is fixedly worn on the calf. The rotating bracket 1 comprises two pairs of upper supporting rods 4 and lower supporting rods 5. The two pairs of upper supporting rods 4 and lower supporting rods 5 are respectively arranged on the inner and outer sides of the thigh fixing sleeve 2 and the calf fixing sleeve 3. The upper end of the upper supporting rod 4 is fixedly connected to the thigh fixing sleeve 2, and the lower end of the lower supporting rod 5 is fixedly connected to the calf fixing sleeve 3. The lower end of the upper support rod 4 and the upper end of the lower support rod 5 on the same side are connected by a movable pin 7 to realize a rotating and sliding composite connection. The lower end of the upper support rod 4 and the upper end of the lower support rod 5 are both provided with a strip groove 9. The movable pin 7 slides with the strip groove 9 at the lower end of the upper support rod 4 and the upper end of the lower support rod 5 on the same side, and the movable pin 7 can rotate freely in the strip groove 9. The outer side of the strip groove 9 is provided with a column head groove 10, and the column heads 8 at both ends of the movable pin 7 are slidably installed in the column head groove 10.

[0035] A limit stop rod 27 is provided at the upper end of the lower support rod 5, and an arc groove 28 is opened at the lower end of the upper support rod 4. A limit screw 29 is installed in the arc groove 28. The limit screw 29 cooperates with the limit stop rod 27 to limit the maximum opening and closing angle of the upper support rod 4 and the lower support rod 5. The position of the limit screw 29 in the arc groove 28 is movable.

[0036] A nut groove 30 is provided on the back of the arc groove 28, and a nut 12 is slidably connected in the nut groove 30. The rod of the limit screw 29 passes through the arc groove 28 and is threadedly connected to the nut 12. The head of the limit screw 29 is pressed on the outer wall of the upper support rod 4.

[0037] The upper end of the lower support rod 5 is provided with a parallel outward expansion head 6, which is installed on the outer side of the lower end of the upper support rod 4. The lower support rod 5 and the inner side wall of the upper support rod 4 are located in the same plane.

[0038] Working principle of this embodiment:

[0039] Fixed wearing: The thigh fixing sleeve 2 and the calf fixing sleeve 3 are fixedly worn on the patient's thigh and calf respectively.

[0040] Connection of the rotating bracket: The rotating bracket 1 is composed of two pairs of upper supporting rods 4 and lower supporting rods 5, which are respectively located at the inner and outer sides of the thigh fixing sleeve 2 and the calf fixing sleeve 3. The upper end of the upper supporting rod 4 is fixedly connected to the thigh fixing sleeve 2, and the lower end of the lower supporting rod 5 is fixedly connected to the calf fixing sleeve 3, thereby forming an integral supporting structure.

[0041] Rotational sliding composite connection: The lower end of the upper support rod 4 and the upper end of the lower support rod 5 on the same side are connected by a movable pin 7. The column heads 8 at both ends of the movable pin 7 are slidably installed in the column head grooves 10, and the movable pin 7 is slidably matched with the strip notches 9 at the lower end of the upper support rod 4 and the upper end of the lower support rod 5 on the same side. The upper support rod 4 and the lower support rod 5 are allowed to rotate and slide relative to each other during the bending and straightening of the knee joint, thereby simulating the rolling and sliding composite movement of the knee joint.

[0042] Limitation of the maximum opening and closing angle: A limit stopper 27 is provided at the upper end of the lower support rod 5, and an arc groove 28 is provided at the lower end of the upper support rod 4, in which a movable limit screw 29 is installed. By adjusting the position of the limit screw 29 in the arc groove 28 and cooperating with the limit stopper 27, the maximum opening and closing angle of the upper support rod 4 and the lower support rod 5 can be limited. This helps to control the bending degree of the knee joint and prevent discomfort or injury caused by excessive bending.

[0043] In this embodiment, through the sliding fit and rotation of the movable pin 7 in the strip-shaped notch 9, and the fit between the limit screw 29 and the limit stopper 27, the device can dynamically adjust its support angle and position as the knee joint bends and straightens, thereby reducing the pressure and friction of the brace on the muscles and soft tissues around the knee joint, thereby improving the wearing comfort.

[0044] This embodiment allows the knee joint to bend and straighten within a reasonable range, which helps to reduce the occurrence of postoperative adhesion and stiffness. At the same time, by limiting the maximum opening and closing angle, it can prevent discomfort or injury caused by excessive bending, and provide effective support and protection for rehabilitation after ligament reconstruction.

[0045] In this embodiment, since the position of the limit screw 29 in the arc groove 28 is movable, the device can be individually adjusted according to the specific conditions and rehabilitation needs of the patient, thereby improving the adaptability and flexibility of the device and enabling it to better meet the rehabilitation needs of different patients.

[0046] Example 2: Please refer to Figures 1-2 8 to 10, a ligament reconstruction fixation device, which differs from Example 1 in that the thigh fixing sleeve 2 and the calf fixing sleeve 3 have the same structure, the calf fixing sleeve 3 is a proportional reduction of the thigh fixing sleeve 2, the thigh fixing sleeve 2 and the calf fixing sleeve 3 include a fixed semicircular arc plate 13 and a rotating semicircular arc plate 14, the outer walls of the two ends of the fixed semicircular arc plate 13 are respectively provided with a connecting seat 16 and a plug-in seat 17, the rotating semicircular arc plate 14 is rotatably connected to one end of the fixed semicircular arc plate 13 provided with the plug-in seat 17 through a rotating shaft 25, and a plug-in belt 26 is provided at the end of the rotating semicircular arc plate 14, the plug-in belt 26 is plugged into and matched with the plug-in groove 18 in the plug-in seat 17, and a structure for locking the plug-in belt 26 is provided on the plug-in seat 17.

[0047] The socket 17 is provided with a threaded hole 19 , which is threadedly connected to a locking screw 23 . The outer end of the locking screw 23 extends out of the outer wall of the socket 17 and is provided with a hand-tightening handle 24 , and the inner end of the locking screw 23 extends into the socket slot 18 .

[0048] The inner end of the locking screw 23 extends into the insertion groove 18 and is rotatably connected to the pressing plate 20 . The inner side wall of the pressing plate 20 is provided with a resistance increasing tooth 21 .

[0049] Both the fixed semicircular arc plate 13 and the rotating semicircular arc plate 14 are provided with ventilation holes 15 .

[0050] An elastic band 11 is connected to the inner wall of the fixed semicircular arc plate 13. The elastic band 11 is spirally wound around the thigh or calf, and the end is fixed with Velcro.

[0051] Working principle of this embodiment:

[0052] Combination of the fixed semicircular plate and the rotating semicircular plate: The fixed semicircular plate 13 and the rotating semicircular plate 14 together constitute the main structure of the fixed sleeve. The two ends of the fixed semicircular plate 13 are respectively provided with a connecting seat 16 and a plug socket 17, and the rotating semicircular plate 14 is connected to one end of the fixed semicircular plate 13 provided with the plug socket 17 through a rotating shaft 25 to achieve a rotating connection.

[0053] The fixing function of the plug-in belt:

[0054] A plug-in belt 26 is provided at the end of the rotating semicircular plate 14. When the rotating semicircular plate 14 rotates around the rotating shaft 25 to fit with the fixed semicircular plate 13, the plug-in belt 26 can be inserted into the plug-in groove 18 in the plug-in socket 17, thereby preliminarily fixing the position between the two.

[0055] The locking mechanism of the locking screw: The socket 17 is provided with a threaded hole 19, and the locking screw 23 is matched with the threaded hole 19 through a threaded connection. The outer end of the locking screw 23 extends out of the outer wall of the socket 17, and is provided with a hand-tightening handle 24 for easy manual operation. When the plug-in belt 26 is inserted into the plug-in slot 18, by rotating the hand-tightening handle 24, the inner end of the locking screw 23 will extend into the plug-in slot 18 and be rotatably connected with the pressure plate 20. The inner side wall of the pressure plate 20 is provided with resistance-increasing teeth 21, which will tightly bite the plug-in belt 26, thereby achieving a firm locking effect.

[0056] Fixing function of elastic band: In order to further enhance the stability of the fixing sleeve, an elastic band 11 is connected to the inner wall of the fixing semicircular arc plate 13. The elastic band 11 is spirally wound around the thigh or calf and fixed by the Velcro at the end. This structure ensures that the fixing sleeve can fit the leg tightly and is not easy to fall off.

[0057] Effect of ventilation holes: In order to improve the wearing comfort, ventilation holes 15 are provided on the fixed semicircular arc plate 13 and the rotating semicircular arc plate 14. These ventilation holes 15 help air circulation, reduce sweat accumulation, and thus keep the legs dry and comfortable.

Claims

1. A ligament reconstruction fixation device, comprising a thigh fixation sleeve (2), a calf fixation sleeve (3) and a rotating bracket (1), characterized in that: The thigh fixing sleeve (2) is fixedly worn on the thigh, and the calf fixing sleeve (3) is fixedly worn on the calf. The rotating bracket (1) comprises two pairs of upper supporting rods (4) and lower supporting rods (5). The two pairs of upper supporting rods (4) and lower supporting rods (5) are respectively arranged on the inner and outer sides of the thigh fixing sleeve (2) and the calf fixing sleeve (3). The upper end of the upper supporting rod (4) is fixedly connected to the thigh fixing sleeve (2), and the lower end of the lower supporting rod (5) is fixedly connected to the calf fixing sleeve (3). The lower end of the upper support rod (4) and the upper end of the lower support rod (5) on the same side are connected in a rotating and sliding manner through a movable pin shaft (7). The lower end of the upper support rod (4) and the upper end of the lower support rod (5) are both provided with a strip-shaped notch (9). The movable pin shaft (7) is slidably matched with the strip-shaped notch (9) at the lower end of the upper support rod (4) and the upper end of the lower support rod (5) on the same side, and the movable pin shaft (7) can rotate freely in the strip-shaped notch (9). The outer side of the strip-shaped notch (9) is provided with a column head groove (10), and the column heads (8) at both ends of the movable pin shaft (7) are slidably installed in the column head groove (10).

2. A ligament reconstruction fixation device according to claim 1, characterized in that: A limit stop rod (27) is provided at the upper end of the lower support rod (5), and an arc groove (28) is provided at the lower end of the upper support rod (4). A limit screw (29) is installed in the arc groove (28). The limit screw (29) cooperates with the limit stop rod (27) to limit the maximum opening and closing angle of the upper support rod (4) and the lower support rod (5), and the position of the limit screw (29) in the arc groove (28) is movable.

3. A ligament reconstruction fixation device according to claim 2, characterized in that: A nut groove (30) is provided on the back side of the arc groove (28), a nut (12) is slidably connected in the nut groove (30), a rod of the limit screw (29) passes through the arc groove (28) and is threadedly connected to the nut (12), and a head of the limit screw (29) is pressed on the outer side wall of the upper support rod (4).

4. The ligament reconstruction fixation device according to claim 1, characterized in that: The upper end of the lower support rod (5) is provided with a parallel outward expansion head (6), and the parallel outward expansion head (6) is installed on the outer side of the lower end of the upper support rod (4). The inner side wall of the lower support rod (5) and the upper support rod (4) are located in the same plane.

5. The ligament reconstruction fixation device according to claim 1, characterized in that: The thigh fixing sleeve (2) and the calf fixing sleeve (3) have the same structure. The calf fixing sleeve (3) is a proportional reduction of the thigh fixing sleeve (2). The thigh fixing sleeve (2) and the calf fixing sleeve (3) comprise a fixed semicircular arc plate (13) and a rotating semicircular arc plate (14). The outer walls at both ends of the fixed semicircular arc plate (13) are respectively provided with a connecting seat (16) and a plug-in seat (17). The rotating semicircular arc plate (14) is rotatably connected to one end of the fixed semicircular arc plate (13) provided with the plug-in seat (17) through a rotating shaft (25). A plug-in belt (26) is provided at the end of the rotating semicircular arc plate (14). The plug-in belt (26) is plugged and matched with a plug-in groove (18) in the plug-in seat (17). The plug-in seat (17) is provided with a structure for locking the plug-in belt (26).

6. A ligament reconstruction fixation device according to claim 5, characterized in that: The socket (17) is provided with a threaded hole (19), the threaded hole (19) is threadedly connected to a locking screw (23), the outer end of the locking screw (23) extends out of the outer wall of the socket (17) and is provided with a hand-tightening handle (24), and the inner end of the locking screw (23) extends into the socket slot (18).

7. A ligament reconstruction fixation device according to claim 6, characterized in that: The inner end of the locking screw (23) extends into the insertion groove (18) and is rotatably connected to the pressure plate (20), and the inner side wall of the pressure plate (20) is provided with a resistance-increasing tooth (21).

8. The ligament reconstruction fixation device according to claim 5, characterized in that: The fixed semicircular arc plate (13) and the rotating semicircular arc plate (14) are both provided with air holes (15).

9. The ligament reconstruction fixation device according to claim 5, characterized in that: An elastic band (11) is connected to the inner wall of the fixed semicircular arc plate (13); the elastic band (11) is spirally wound around the thigh or calf, and the end is fixed by Velcro.

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