Fixing support for lower limb fracture rehabilitation

Abstract

The invention discloses a fixing support for lower limb fracture rehabilitation, and relates to the field of medical instruments, the fixing support comprises a shank fixing assembly, a supporting plate, a fixing part, a fixing frame, a first supporting assembly, a second supporting assembly, a first limiting mechanism and a second limiting mechanism, the shank fixing assembly can be fixed to the shank of a patient, and the fixing part is arranged on the supporting plate; the fixing part is used for being matched with the supporting plate to fix the feet of a patient to the supporting plate, the top end of the fixing frame is connected with the shank fixing assembly, and the first supporting assembly comprises a U-shaped frame, a supporting shaft and two first connecting rods; according to the fixing support for rehabilitation of the lower limb fracture, the feet and the shanks of a patient are stably fixed to the support through the shank fixing assembly and the fixing piece, and meanwhile in the rehabilitation stage, the patient can do flexion and extension and inward and outward turning exercises of ankle joints on the support by releasing limitation of the first limiting mechanism and the second limiting mechanism; perfect combination of stable fixation and flexible rehabilitation is realized.

Description

Technical Field

[0001] The invention relates to medical device technology, and in particular to a fixing bracket for lower limb fracture rehabilitation. Background Art

[0002] The use of fixation braces is crucial in the rehabilitation process of lower limb fractures, especially ankle fractures. Ankle fractures not only affect the stability and integrity of the ankle joint, but may also be accompanied by damage to skin, ligaments and other tissues. Therefore, during the rehabilitation stage, firmly fixing the lower leg of the patient is the key to avoiding secondary injuries.

[0003] Existing fixed brackets have a single fixing method, and most fixed brackets are integrated or have only 1 to 2 degrees of freedom, which makes it difficult for patients to flexibly adjust the bracket to adapt to different rehabilitation needs during the rehabilitation stage. Due to the rigidity of the fixed bracket, patients often need to remove the bracket before they can perform rehabilitation training, such as ankle flexion and extension and eversion and eversion exercises. This not only increases the difficulty of rehabilitation, but may also prolong the rehabilitation period. Moreover, the motion range of existing fixed brackets is fixed and single, and it is difficult to adjust according to the patient's specific rehabilitation stage, which may cause the rehabilitation training range to be too large or too small, which is not conducive to the patient's rehabilitation process. Summary of the invention

[0004] The purpose of the present invention is to provide a fixation bracket for lower limb fracture rehabilitation, so as to solve the technical problems that the fixation method of the fixation bracket in the prior art is single, it is difficult to flexibly adjust the bracket to adapt to different rehabilitation needs, it is difficult to adjust according to the patient's specific rehabilitation stage, and it is not conducive to the patient's rehabilitation process.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fixing bracket for lower limb fracture rehabilitation, comprising a calf fixing assembly, a support plate, a fixing piece, a fixing frame, a first support assembly, a second support assembly, a first limiting mechanism and a second limiting mechanism, the calf fixing assembly can be fixed to the calf of a patient, the fixing piece is arranged on the support plate, the fixing piece is used to cooperate with the support plate to fix the patient's foot on the support plate, and the top of the fixing frame is connected to the calf fixing assembly; The first support assembly includes a U-shaped frame, a support shaft, and two first connecting rods, one end of the support shaft is fixedly connected to the U-shaped frame, the outer wall of the support shaft is rotatably connected to the fixed frame, the two first connecting rods are respectively arranged at the two ends of the U-shaped frame, and the top ends of the two first connecting rods are respectively connected to the U-shaped frame through ball hinges, and the bottom ends of the two first connecting rods are respectively connected to the support plate through ball hinges; One end of the support shaft away from the U-shaped frame is connected to a first limiting mechanism, and the first limiting mechanism can prevent the support shaft from rotating around its own axis; The second support assembly includes a second connecting rod and an articulated seat, the second connecting rod is arranged at one end of the support plate, the bottom end of the second connecting rod is hinged to the support plate through a ball hinge, the top end of the second connecting rod is rotatably connected to the articulated seat through a rotating shaft, the axial direction of the rotating shaft is parallel to the width of the support plate, and a guide member for limiting the movement of the articulated seat along the height direction of the fixed frame is connected to one side of the articulated seat; One side of the articulated seat is connected to the second limiting mechanism, and the second limiting mechanism can prevent the articulated seat from moving along the height direction of the fixing frame.

[0006] Furthermore, the first limiting mechanism includes an annular disk and an A pin, the annular disk is fixedly sleeved on one end of the support shaft away from the U-shaped frame, a plurality of A sockets are provided on the annular disk in a circular array centered on the axis of the annular disk, a threaded hole is provided on the fixing frame and the axial direction of the A threaded hole is parallel to the axial direction of the A socket, and the outer wall of the A pin is threadedly connected to the inner wall of the A threaded hole.

[0007] Furthermore, the first limiting mechanism also includes an A driving member, an A positioning rod and two limit bars. One end of the A positioning rod is fixedly connected to the annular disk, and the two limit bars are respectively arranged on the upper and lower sides of the A positioning rod. One side of the A driving member is respectively connected to the two limit bars. The A driving member is used to drive the two limit bars to move along the height direction of the fixed frame.

[0008] Furthermore, the A driving member includes an A screw and a guide rod, the outer side walls of the guide rod are respectively slidably connected to the two limit bars, the two ends of the guide rod are respectively fixedly connected to the fixed frame, the A screw is provided with two sections of thread grooves with opposite rotation directions, the A screw is respectively threadedly connected to the two limit bars through the two sections of thread grooves, and the outer side walls at both ends of the A screw are respectively rotatably connected to the fixed frame.

[0009] Furthermore, the second limiting mechanism includes a positioning plate and a B pin, one side of the positioning plate is fixedly connected to the fixing frame, a plurality of B sockets are provided on the positioning plate and at equal intervals in the opposite direction along the height of the positioning plate, a B threaded hole is provided on the hinge seat, and the axial direction of the B threaded hole is parallel to the axial direction of the B socket, and the outer wall of the B pin is threadedly connected to the inner wall of the B threaded hole.

[0010] Furthermore, the second limiting mechanism also includes a B driving member and two limit blocks, one side of the two limit blocks are respectively slidably connected to the fixed frame, the two limit blocks are respectively arranged on the upper and lower sides of the hinge seat, one side of the B driving member is respectively connected to the two limit blocks, and the B driving member is used to drive the two limit blocks to move along the height direction of the fixed frame.

[0011] Furthermore, the B driving member is a B screw rod, which is provided with two thread grooves with opposite rotation directions. The B screw rod is threadedly connected to the two limit blocks through the two thread grooves respectively, and the outer wall of the middle section of the B screw rod is rotatably connected to the fixed frame.

[0012] Furthermore, the guide member is a vertical rod, one end of which passes through the hinge seat and the outer side wall of the vertical rod is slidably connected to the hinge seat, and both ends of the vertical rod are fixedly connected to the fixing frame respectively.

[0013] Furthermore, the calf fixing assembly includes a calf fixing plate and at least two A straps arranged on the calf fixing plate, and the bottom end of the calf fixing plate is fixedly connected to the top end of the fixing frame.

[0014] Furthermore, a flexible cushion layer is provided on the inner side of the calf fixing plate.

[0015] Compared with the prior art, the present invention provides a fixation support for lower limb fracture rehabilitation, which firmly fixes the patient's foot and calf on the support through the calf fixation assembly and the fixing member. At the same time, during the rehabilitation stage, the restrictions of the first restriction mechanism and the second restriction mechanism can be released, so that the patient can perform ankle flexion and extension and inversion and eversion exercises on the support, thus achieving a perfect combination of firm fixation and flexible rehabilitation. Adjustable limiting structures are provided through the first limiting mechanism and the second limiting mechanism. By adjusting the positions of the limiting strip and the limiting block, the movement range of the support shaft and the second connecting rod can be specifically limited, thereby achieving precise control of the patient's rehabilitation training range and avoiding secondary injury to the patient's fracture due to excessive rehabilitation training range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of a first external overall structure provided by an embodiment of the present invention; Figure 2 A second external overall schematic diagram provided for an embodiment of the present invention; Figure 3 A schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention; Figure 4 The embodiment of the present invention provides Figure 3 A is an enlarged schematic diagram; Figure 5 The embodiment of the present invention provides Figure 3 The enlarged schematic diagram of point B in FIG. Figure 6 A schematic diagram of the combination of the annular disk, A jack, A positioning rod, support shaft and U-shaped frame provided in an embodiment of the present invention; Figure 7A schematic diagram of a combination of a first limiting mechanism, a U-shaped frame, a support shaft and a fixing frame provided in an embodiment of the present invention; Figure 8 A schematic diagram of the combination of a second limiting mechanism, a support plate, a second connecting rod, a fixing frame and a hinge seat provided in an embodiment of the present invention.

[0018] Description of reference numerals: 1. Calf fixing assembly; 11. Calf fixing plate; 12. A strap; 2. Support plate; 21. Fixing piece; 3. Fixing frame; 4. Second supporting assembly; 41. U-shaped frame; 42. Support shaft; 43. First connecting rod; 5. Second supporting assembly; 51. Second connecting rod; 52. Articulated seat; 6. First limiting mechanism; 61. Annular disk; 62. A latch; 63. A socket; 64. A driving member; 641. A screw; 642. Guide rod; 65. A positioning rod; 66. Limiting strip; 7. Second limiting mechanism; 71. Positioning plate; 72. B latch; 73. B socket; 74. B driving member; 75. Limiting block; 8. Vertical rod. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] See also Figures 1 to 3 A fixation support for lower limb fracture rehabilitation, comprising a calf fixation assembly 1, a support plate 2, a fixing member 21, a fixing frame 3, a first support assembly 4, a second support assembly 5, a first limiting mechanism 6 and a second limiting mechanism 7, the calf fixation assembly 1 can be fixed to the patient's calf, the fixing member 21 is arranged on the support plate 2, the fixing member 21 is used to cooperate with the support plate 2 to fix the patient's foot on the support plate 2, and the top of the fixing frame 3 is connected to the calf fixation assembly 1; The first support assembly 4 includes a U-shaped frame 41, a support shaft 42, and two first connecting rods 43. One end of the support shaft 42 is fixedly connected to the U-shaped frame 41, and the outer wall of the support shaft 42 is rotatably connected to the fixed frame 3. The two first connecting rods 43 are respectively arranged at the two ends of the U-shaped frame 41, and the top ends of the two first connecting rods 43 are respectively connected to the U-shaped frame 41 through ball hinges, and the bottom ends of the two first connecting rods 43 are respectively connected to the support plate 2 through ball hinges. One end of the support shaft 42 away from the U-shaped frame 41 is connected to the first limiting mechanism 6, and the first limiting mechanism 6 can prevent the support shaft 42 from rotating around its own axis; The second support assembly 5 includes a second connecting rod 51 and an articulated seat 52. The second connecting rod 51 is arranged at one end of the support plate 2. The bottom end of the second connecting rod 51 is hinged to the support plate 2 through a ball hinge. The top end of the second connecting rod 51 is rotatably connected to the articulated seat 52 through a rotating shaft. The axial direction of the rotating shaft is parallel to the width of the support plate 2. A guide member is connected to one side of the articulated seat 52 to limit the movement of the articulated seat 52 along the height direction of the fixing frame 3. One side of the articulated seat 52 is connected to the second limiting mechanism 7 , and the second limiting mechanism 7 can prevent the articulated seat 52 from moving along the height direction of the fixing frame 3 .

[0021] Lower limb fractures include femoral fractures, patellar fractures, tibia and fibula fractures, foot spur fractures and ankle fractures. Among them, ankle fractures are one of the most common lower limb fractures, usually caused by indirect violence such as traffic accidents, work injuries, and falls from heights. Ankle fractures not only affect the stability and integrity of the ankle joint, but may also be accompanied by damage to tissues such as the skin and ligaments. Therefore, when dealing with ankle fractures, special attention should be paid to avoid moving or attempting to reposition the ankle by yourself to avoid aggravating the injury. For this reason, during the rehabilitation of patients with ankle fractures, the patient's feet and calves need to be fixed with a fixed bracket to avoid secondary injuries. However, the existing fixed brace is usually integrated or has only 1 to 2 degrees of freedom. During the patient's rehabilitation stage, the patient needs to wait until the fixed brace is removed before rehabilitation training can be carried out, such as ankle flexion and extension and inversion and eversion exercises to restore ankle flexibility. In addition, the existing fixed brace has a fixed range of motion and cannot be adjusted according to the patient's specific rehabilitation stage. To this end, the present application fixes the fixing bracket of the present application to the patient's calf leg through the calf fixing assembly 1, and fixes the patient's foot through the fixing piece 21 and the support plate 2. When the part below the patient's calf needs to be firmly fixed in the early stage of the rehabilitation stage, the first limiting mechanism 6 is used to prevent the rotation of the support shaft 42. At this time, since the support shaft 42 cannot rotate, the U-shaped frame 41 cannot rotate, and the two first connecting rods 43 at the bottom of the U-shaped frame 41 firmly support the support plate 2. At the same time, the second limiting mechanism 7 prevents the articulated seat 52 from moving in the opposite direction along the height of the fixing frame 3, and the articulated seat 52 and the second connecting rod 51 cannot move. At this time, the second connecting rod 51 and the two first connecting rods 43 jointly firmly support the support plate 2, so that the patient's angle can be firmly supported and positioned; When the patient is in the rehabilitation training stage, the first limiting mechanism 6 is freed from the rotation obstruction of the support shaft 42 and the second limiting mechanism 7 is freed from the movement obstruction of the articulated seat 52. When the patient performs inversion and eversion exercises of the foot, since the bottoms of the first connecting rod 43 and the second connecting rod 51 are connected to the support plate 2 through ball hinges, the support plate 2 can rotate with the connection between the second connecting rod 51 and the support plate 2 as a fulcrum to achieve inversion and eversion training of the patient's foot; when the patient performs ankle flexion and extension training, the articulated seat 52 can move in the opposite direction along the height of the fixing frame 3, that is, the second connecting rod 51 can move, and the support plate 2 can rotate with the connection between the two first connecting rods 43 and the support plate 2 as a fulcrum to achieve ankle flexion and extension training of the patient.

[0022] See also Figures 1 to 4 , Figure 6 and Figure 7 In one embodiment of the present invention, the first limiting mechanism 6 includes an annular disk 61 and an A plug pin 62. The annular disk 61 is fixedly sleeved on one end of the support shaft 42 away from the U-shaped frame 41. A plurality of A plug holes 63 are provided on the annular disk 61 in a circular array centered on the axis of the annular disk 61. A threaded hole is provided on the fixing frame 3 and the axial direction of the A threaded hole is parallel to the axial direction of the A plug hole 63. The outer wall of the A plug pin 62 is threadedly connected to the inner wall of the A threaded hole. When it is necessary to prevent the rotation of the support shaft 42, the A latch 62 is rotated, and the A latch 62 moves along its own axial direction, and the end of the A latch 62 is inserted into one of the A insertion holes 63. At this time, under the action of the A latch 62, the annular disk 61 and the support shaft 42 cannot rotate; when the rotation of the support shaft 42 is not prevented, that is, when the patient can perform foot rehabilitation training, the A latch 62 is rotated in the opposite direction to disengage the A latch 62 from the A insertion hole 63; In one embodiment of the present invention, the first limiting mechanism 6 further includes an A driving member 64, an A positioning rod 65 and two limiting bars 66, one end of the A positioning rod 65 is fixedly connected to the annular disk 61, the two limiting bars 66 are respectively arranged on the upper and lower sides of the A positioning rod 65, one side of the A driving member 64 is respectively connected to the two limiting bars 66, and the A driving member 64 is used to drive the two limiting bars 66 to move respectively along the height direction of the fixed frame 3; When the patient is in different stages of rehabilitation, when the A pin 62 is not inserted into any of the A sockets 63, the A driving member 64 can drive the two limit bars 66 to move so that a certain distance is left between the two limit bars 66. This distance is the activity space when the A positioning rod 65 rotates with the annular disk 61, that is, the activity space in which the annular disk 61 can rotate, so that the rotation range of the support shaft 42 can be specifically limited, thereby realizing the limitation of the range when the patient is doing rehabilitation training, so that the patient can do rehabilitation training of different ranges at different stages of rehabilitation, and avoid secondary injury to the fracture of the patient caused by excessive rehabilitation training; In one embodiment of the present invention, the A driving member 64 includes an A screw rod 641 and a guide rod 642. The outer side walls of the guide rod 642 are respectively slidably connected to the two limit bars 66. The two ends of the guide rod 642 are respectively fixedly connected to the fixing frame 3. The A screw rod 641 is provided with two sections of thread grooves with opposite rotation directions. The A screw rod 641 is respectively threadedly connected to the two limit bars 66 through the two sections of thread grooves. The outer side walls at both ends of the A screw rod 641 are respectively rotatably connected to the fixing frame 3. By rotating the A screw 641 and under the limitation of the guide rod 642, the A screw 641 drives the two limiting bars 66 to move towards or in opposite directions through the two thread grooves thereon with opposite rotation directions, thereby realizing the adjustment of the position of the limiting bars 66.

[0023] See also Figures 1 to 3 , Figure 5 and Figure 8 In one embodiment of the present invention, the second limiting mechanism 7 includes a positioning plate 71 and a B plug pin 72. One side of the positioning plate 71 is fixedly connected to the fixing frame 3. A plurality of B plug holes 73 are provided on the positioning plate 71 and are equidistantly spaced in the opposite direction along the height of the positioning plate 71. A B threaded hole is provided on the hinge seat 52, and the axial direction of the B threaded hole is parallel to the axial direction of the B plug hole 73. The outer wall of the B plug pin 72 is threadedly connected to the inner wall of the B threaded hole. When it is necessary to hinder the movement of the articulated seat 52, the B latch 72 is rotated, and the B latch 72 moves along its own axial direction, and the end of the B latch 72 is inserted into one of the B insertion holes 73. At this time, under the action of the B latch 72, the articulated seat 52 cannot move in the opposite direction along the height of the fixing frame 3; when the movement of the articulated seat 52 is not hindered, that is, when the patient can perform foot rehabilitation training, the B latch 72 is rotated in the opposite direction to disengage the B latch 72 from the B insertion hole 73; In one embodiment of the present invention, the second limiting mechanism 7 further includes a B driving member 74 and two limit blocks 75, one side of the two limit blocks 75 is respectively connected to the fixed frame 3 in a sliding manner, the two limit blocks 75 are respectively arranged on the upper and lower sides of the hinge seat 52, one side of the B driving member 74 is respectively connected to the two limit blocks 75, and the B driving member 74 is used to drive the two limit blocks 75 to move respectively along the height direction of the fixed frame 3; Similarly, when the patient is undergoing staged rehabilitation training, at different stages of rehabilitation training, the B pin 72 is disengaged from the B socket 73, and the two limit blocks 75 are driven by the B drive member 74 to move to a certain distance between the two limit blocks 75. This distance is the activity space for the movement of the hinge seat 52, so that the movement range of the second connecting rod 51 can be specifically limited, thereby achieving the limitation of the range of the patient's rehabilitation training, so that the patient can perform rehabilitation training of different ranges at different rehabilitation stages, and avoid secondary injury to the patient's fracture caused by excessive rehabilitation training.

[0024] In one embodiment of the present invention, the B driving member 74 is a B screw rod, on which two sections of thread grooves with opposite rotation directions are formed, and the B screw rod is threadedly connected to the two limit blocks 75 through the two sections of thread grooves, respectively, and the outer side wall of the middle section of the B screw rod is rotatably connected to the fixing frame 3; By rotating the B screw, since one side of the limit block 75 is slidably connected to the fixing frame 3, the B screw drives the two limit blocks 75 to move toward or in the opposite direction through the two thread grooves thereon with opposite rotation directions, thereby adjusting the position of the limit block 75.

[0025] In one embodiment of the present invention, the guide member is a vertical rod 8, one end of the vertical rod 8 passes through the hinge seat 52 and the outer wall of the vertical rod 8 is slidably connected to the hinge seat 52, and the two ends of the vertical rod 8 are respectively fixedly connected to the fixing frame 3. The hinge seat 52 is guided by the vertical rod 8, so that the movement of the hinge seat 52 is smoother.

[0026] In one embodiment of the present invention, the calf fixing assembly 1 includes a calf fixing plate 11 and at least two A straps 12 arranged on the calf fixing plate 11, one end of the A strap 12 is fixedly connected to the calf fixing plate 11, and the bottom end of the calf fixing plate 11 is fixedly connected to the top end of the fixing frame 3; The connection between the A strap 12 and the calf fixing plate 11 can be: the other end of the A strap 12 is provided with a hook-surface Velcro, and the calf fixing plate 11 is provided with a fleece-surface Velcro that matches the hook-surface Velcro; The other end of the A strap 12 can also be connected to the calf fixing plate 11 by means of a buckle, so that the A strap 12 cooperates with the calf fixing plate 11 to fix the fixing bracket of the present application to the patient's calf.

[0027] In one embodiment of the present invention, the fixing member 21 includes a toe portion and a B strap disposed on the support plate 2, and the connection between the B strap and the support plate 2 can be: One end of the B strap is fixedly connected to the support plate 2, and the other end of the B strap is provided with a hook-surface Velcro, and the calf support plate 2 is provided with a fleece-surface Velcro that matches the hook-surface Velcro; The other end of the B strap can also be connected to the support plate 2 by means of a buckle, so that the B strap cooperates with the support plate 2 and the toe to fix the patient's foot on the support plate 2.

[0028] In one embodiment of the present invention, a flexible cushion layer is provided on the inner side of the calf fixation plate 11, so that the patient can feel more comfortable when wearing the fixation support of the present application.

[0029] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fixation support for lower limb fracture rehabilitation, characterized in that: The invention comprises a calf fixing assembly (1), a support plate (2), a fixing member (21), a fixing frame (3), a first support assembly (4), a second support assembly (5), a first limiting mechanism (6) and a second limiting mechanism (7); the calf fixing assembly (1) can be fixed to the calf of a patient; the fixing member (21) is arranged on the support plate (2); the fixing member (21) is used to cooperate with the support plate (2) to fix the patient's foot on the support plate (2); and the top end of the fixing frame (3) is connected to the calf fixing assembly (1); The first support assembly (4) comprises a U-shaped frame (41), a support shaft (42), and two first connecting rods (43); one end of the support shaft (42) is fixedly connected to the U-shaped frame (41); an outer wall of the support shaft (42) is rotatably connected to the fixed frame (3); the two first connecting rods (43) are respectively arranged at two ends of the U-shaped frame (41); the top ends of the two first connecting rods (43) are respectively connected to the U-shaped frame (41) via ball hinges; and the bottom ends of the two first connecting rods (43) are respectively connected to the support plate (2) via ball hinges; One end of the support shaft (42) away from the U-shaped frame (41) is connected to a first limiting mechanism (6), and the first limiting mechanism (6) is capable of preventing the support shaft (42) from rotating around its own axis; The second support assembly (5) comprises a second connecting rod (51) and an articulated seat (52), wherein the second connecting rod (51) is arranged at one end of the support plate (2), the bottom end of the second connecting rod (51) is hinged to the support plate (2) via a ball hinge, the top end of the second connecting rod (51) is rotatably connected to the articulated seat (52) via a rotating shaft, the axial direction of the rotating shaft is parallel to the width of the support plate (2), and a guide member for limiting the movement of the articulated seat (52) along the height direction of the fixing frame (3) is connected to one side of the articulated seat (52); One side of the hinge seat (52) is connected to the second limiting mechanism (7), and the second limiting mechanism (7) can prevent the hinge seat (52) from moving along the height direction of the fixing frame (3).

2. A fixation support for lower limb fracture rehabilitation according to claim 1, characterized in that: The first limiting mechanism (6) comprises an annular disk (61) and an A plug pin (62). The annular disk (61) is fixedly sleeved on one end of the support shaft (42) away from the U-shaped frame (41). A plurality of A plug holes (63) are provided on the annular disk (61) in a circular array with the axis of the annular disk (61) as the center. A threaded hole is provided on the fixing frame (3) and the axial direction of the A threaded hole is parallel to the axial direction of the A plug hole (63). The outer wall of the A plug pin (62) is threadedly connected to the inner wall of the A threaded hole.

3. A fixation support for lower limb fracture rehabilitation according to claim 2, characterized in that: The first limiting mechanism (6) further comprises an A driving member (64), an A positioning rod (65) and two limiting bars (66), one end of the A positioning rod (65) is fixedly connected to the annular disk (61), the two limiting bars (66) are respectively arranged on the upper and lower sides of the A positioning rod (65), one side of the A driving member (64) is respectively connected to the two limiting bars (66), and the A driving member (64) is used to drive the two limiting bars (66) to move respectively along the height direction of the fixed frame (3).

4. A fixation support for lower limb fracture rehabilitation according to claim 3, characterized in that: The A driving member (64) comprises an A screw rod (641) and a guide rod (642). The outer side walls of the guide rod (642) are respectively slidably connected to the two limit bars (66). The two ends of the guide rod (642) are respectively fixedly connected to the fixing frame (3). The A screw rod (641) is provided with two sections of thread grooves with opposite rotation directions. The A screw rod (641) is respectively threadedly connected to the two limit bars (66) through the two sections of thread grooves. The outer side walls of the two ends of the A screw rod (641) are respectively rotatably connected to the fixing frame (3).

5. A fixation support for lower limb fracture rehabilitation according to claim 1, characterized in that: The second limiting mechanism (7) comprises a positioning plate (71) and a B plug pin (72), one side of the positioning plate (71) is fixedly connected to the fixing frame (3), a plurality of B plug holes (73) are provided on the positioning plate (71) and are arranged at equal intervals in the opposite direction along the height of the positioning plate (71), a B threaded hole is provided on the hinge seat (52), and the axial direction of the B threaded hole is parallel to the axial direction of the B plug hole (73), and the outer wall of the B plug pin (72) is threadedly connected to the inner wall of the B threaded hole.

6. A fixation support for lower limb fracture rehabilitation according to claim 5, characterized in that: The second limiting mechanism (7) further comprises a B driving member (74) and two limit blocks (75), one side of the two limit blocks (75) being respectively slidably connected to the fixing frame (3), the two limit blocks (75) being respectively arranged on the upper and lower sides of the hinge seat (52), one side of the B driving member (74) being respectively connected to the two limit blocks (75), and the B driving member (74) being used to drive the two limit blocks (75) to move respectively along the height direction of the fixing frame (3).

7. A fixation support for lower limb fracture rehabilitation according to claim 6, characterized in that: The B driving member (74) is a B screw rod, which is provided with two sections of thread grooves with opposite rotation directions. The B screw rod is threadedly connected to the two limit blocks (75) through the two sections of thread grooves, and the outer wall of the middle section of the B screw rod is rotatably connected to the fixing frame (3).

8. A fixation support for lower limb fracture rehabilitation according to claim 1, characterized in that: The guide member is a vertical rod (8), one end of which passes through the hinge seat (52), and the outer wall of the vertical rod (8) is slidably connected to the hinge seat (52), and both ends of the vertical rod (8) are respectively fixedly connected to the fixing frame (3).

9. A fixation support for lower limb fracture rehabilitation according to claim 1, characterized in that: The calf fixing assembly (1) comprises a calf fixing plate (11) and at least two A straps (12) arranged on the calf fixing plate (11), wherein the bottom end of the calf fixing plate (11) is fixedly connected to the top end of the fixing frame (3).

10. A fixation support for lower limb fracture rehabilitation according to claim 1, characterized in that: A flexible cushion layer is provided on the inner side of the calf fixing plate (11).

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