External fixing brace for thigh fracture

Abstract

The thigh fracture external fixation brace comprises a thigh outer side clamping plate and a thigh inner side clamping plate, a supporting seat is arranged on one side of the thigh outer side clamping plate, an upper pelvic bone fixing plate is arranged on the surface of one side of the supporting seat, a lower pelvic bone fixing plate is further arranged on the surface of one side of the supporting seat, and an adjusting mechanism is further arranged in the supporting seat; the adjusting mechanism comprises a main rotating shaft, the main rotating shaft is rotationally arranged in the hole body, a nut base is arranged on the ball screw, one end of the nut base is connected with a carrying table, the carrying table is connected with the lower pelvic bone fixing plate, and a connecting structure is further arranged at the lower end of the main rotating shaft. According to the thigh fixing device, the pelvis and the thigh of a thigh fracture patient can be fixed at the same time, meanwhile, adjustment can be conducted according to the distance between the pelvis and the thigh of the patient, auxiliary fixing can be conducted on the hip joint and the thigh of the patient, and the thigh of the patient is prevented from moving.

Description

Technical Field

[0001] The invention belongs to the technical field of fracture braces, and in particular relates to an external fixation brace for thigh fractures. Background Art

[0002] A fracture fixator is a medical device used to fix the fracture site and promote fracture healing; common fracture fixators include plaster bandages, external fixators, internal fixators, etc.; an external fixator is a medical device that fixes the fracture site in a normal position through an external metal bracket and steel needles; external fixators are suitable for complex fractures, open fractures and fractures accompanied by soft tissue injuries, especially after femoral fractures, the patient's thigh and pelvis need to be relatively fixed.

[0003] For example, the fracture fixation device disclosed in the invention with the authorization announcement number CN106108993B includes two fixing belts and three fixing splints. The two fixing belts are respectively fixed at the upper and lower ends of the three fixing splints, and the three fixing splints are evenly spaced on the two fixing belts. The fixing splints are hollow inside, and a ventilating tube penetrating the upper and lower surfaces of the fixing splints is provided on the fixing splints. A water pipe joint that is connected to the inside of the fixing splint is provided on the left and right end faces of the fixing splints; an external herbal medicine fixing device is provided between two adjacent fixing splints; and a movable plate with a piston is provided on the upper surface of each fixing splint. During the application process, cold water or hot water can be introduced into the intervals of the fixing splints in the technical solution to promote the contraction and relaxation of blood vessels at the fracture site, so as to accelerate blood circulation and shorten the fracture recovery period.

[0004] When the above technical solution is used, it cannot fix the patient's thigh and pelvis, and is not suitable for femoral fractures. At the same time, it cannot adjust the fixation position according to the patient's pelvic and femoral fracture positions, and the scope of use is limited. Moreover, it cannot relatively fix the patient's hip joint and thigh, which can easily cause the patient's thigh to move and affect the healing of the femoral fracture. For this reason, we propose a thigh fracture external fixation brace. Summary of the invention

[0005] The purpose of the present invention is to provide an external fixation brace for a thigh fracture to solve the problem that the prior art proposed in the above background technology cannot fix the patient's thigh and pelvis, is not suitable for femoral fractures, and cannot adjust the fixation position according to the position of the patient's pelvis and femoral fractures, has a limited scope of use, and cannot relatively fix the patient's hip joint and thigh, which easily causes the patient's thigh to move and affects the healing of the femoral fracture.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thigh fracture external fixation brace, comprising an outer thigh splint and an inner thigh splint, a support seat is arranged on one side of the outer thigh splint, an upper pelvic fixation plate is arranged on one side surface of the support seat, a lower pelvic fixation plate is also arranged on one side surface of the support seat, and an adjustment mechanism for controlling the positions of the lower pelvic fixation plate and the outer thigh splint is also arranged in the support seat;

[0007] The adjusting mechanism comprises a main rotating shaft, the main rotating shaft is rotatably arranged in a hole body, the hole body is arranged in the middle of a ball screw, the ball screw is rotatably arranged in a slot body, the slot body is arranged on a side surface of a support seat, a nut seat is arranged on the ball screw, one end of the nut seat is connected to a carrier, the carrier is connected to a lower pelvic fixing plate, a connecting structure for controlling the rotation of the ball screw and the rotation of the adjusting screw is also arranged at the lower end of the main rotating shaft, the adjusting screw is rotatably arranged in a cavity, the cavity is arranged on one side of the support seat, an adjusting nut is arranged on the adjusting screw, and the adjusting nut is connected to the outer thigh splint through a connecting component;

[0008] Wherein, a groin positioning mechanism is arranged on one side of the lower pelvic fixing plate, and the lower pelvic fixing plate is connected to the outer thigh splint via the groin positioning mechanism.

[0009] Preferably, the connecting structure includes an upper gear, which is arranged on one side of the main shaft. The upper gear can intermittently mesh with the inner gear ring, and the inner gear ring is arranged on the lower side of the hole body. Through the transmission of the upper gear and the inner gear ring, the ball screw can be driven to rotate and the position of the lower pelvic fixing plate can be adjusted.

[0010] Preferably, the connection structure also includes an outer gear ring sleeve, which is arranged at the bottom of the main shaft. The outer gear ring sleeve can intermittently mesh with the lower gear, and the lower gear is arranged on one side of the adjusting screw. The rotation of the adjusting screw can be controlled through the transmission between the outer gear ring sleeve and the lower gear.

[0011] Preferably, one end of the main shaft is rotatably connected to the carrier through a ball bearing, the carrier is arranged on one side of the cavity, an adjusting rod is arranged on the upper side of the carrier, the adjusting rod is movably arranged in an adjusting groove, the adjusting groove is arranged on one side surface of the cavity, a first spring is arranged on one side surface of the adjusting groove, one end of the first spring is connected to the adjusting rod, which can ensure the stability of the main shaft during rotation and enable the main shaft to quickly reset and move.

[0012] Preferably, a longitudinal upright rod is provided on one side surface of the adjusting nut, one end of the longitudinal upright rod is connected to the column, and one end of the column is connected to the outer thigh splint, and the outer thigh splint can be driven to move by movement of the adjusting nut.

[0013] Preferably, a limiting slider is provided on the outer surface of the adjusting nut, one end of the limiting slider is slidably provided in a limiting slide groove, and the limiting slide groove is provided on one side surface of the cavity, thereby improving the guiding property of the adjusting nut when moving.

[0014] Preferably, the upper pelvic fixing plate and the lower pelvic fixing plate are both arc-shaped structures, and fixing straps are provided on one side of the upper pelvic fixing plate and the lower pelvic fixing plate to fix the upper pelvic fixing plate and the lower pelvic fixing plate.

[0015] Preferably, the groin positioning mechanism includes a bearing sleeve, which is rotatably arranged on one side of the lower pelvic fixing plate through a secondary rotating shaft, and a connecting rib is movably arranged in the bearing sleeve, and a guide column is arranged at one end of the connecting rib, and the guide column is movably arranged in an arc guide rail, and the arc guide rail is arranged on the surface of one side of the outer thigh splint, so that when the position of the lower pelvic fixing plate or the outer thigh splint is adjusted, the bearing sleeve can automatically rotate, and the connecting rib can automatically move and adjust the angle.

[0016] Preferably, a positioning screw is provided on one side of the connecting rib, and a main conical block is provided at one end of the positioning screw, the main conical block is fitted with a secondary arc wedge block, and the secondary arc wedge block is provided at one end of a fixing pin, and the fixing pin is movably provided in a guide hole, and a second spring is sleeved on the fixing pin, one end of the second spring is connected to the fixing pin, and the other end of the second spring is connected to the guide hole, and one end of the fixing pin is clamped in a fixing groove, and the fixing grooves are provided on both sides of the arc guide rail, so as to lock and fix the connecting rib, and at the same time fix the lower pelvic fixing plate and the outer thigh splint, thereby positioning the patient's hip joint and thigh.

[0017] Preferably, inner clamping plates are provided on both sides of the inner thigh splint, fixing bolts are provided on the inner clamping plates, one end of the fixing bolts corresponds to the bolt mounting holes, the bolt mounting holes are evenly arranged on one side of the outer clamping plates, and the outer clamping plates are arranged on both sides of the outer thigh splint, so that the outer thigh splint and the inner thigh splint can be fixed on both sides of the femoral fracture, and the femoral fracture position can be quickly fixed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present application can simultaneously fix the pelvis and thigh of a patient with a femoral fracture, thereby ensuring the stability of the fixation of the patient's thigh. At the same time, the fixation can be adjusted according to the distance between the patient's pelvis and thigh, and has a wide range of applications.

[0020] (2) After the pelvis and thigh are fixed, the present application can also assist in fixing the patient's hip joint and thigh to prevent the patient's thigh from moving and causing secondary injury to the fracture site, thereby ensuring the rapid healing of the patient's femoral fracture in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a half-section structural schematic diagram of the adjustment mechanism in the present invention;

[0023] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 5 It is a partial half-section structural schematic diagram of the adjustment mechanism in the present invention;

[0026] Figure 6 It is a half-section structural schematic diagram of the meshing state of the outer gear ring and the lower gear in the present invention;

[0027] Figure 7 It is a structural schematic diagram of the groin positioning mechanism of the present invention;

[0028] Figure 8 It is a right side half-section structural schematic diagram of the groin positioning mechanism of the present invention;

[0029] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure at C in the middle;

[0030] Fig.10 It is a schematic diagram of the main cross-sectional structure of the arc guide rail in the present invention;

[0031] Fig.11 It is a schematic diagram of the connection structure between the outer thigh splint and the inner thigh splint in the present invention;

[0032] Fig.12 for Fig.11 Schematic diagram of the enlarged structure at D in the middle;

[0033] In the figure: 1. Lower pelvic fixing plate; 2. Support seat; 3. Upper pelvic fixing plate; 4. Upper fixing strap; 5. Inguinal positioning mechanism; 6. Inner thigh splint; 7. Outer thigh splint; 61. Magic hook surface; 62. Fixing bolt; 63. Inner clamping plate; 64. Strap positioning port; 71. Lower fixing strap; 72. Outer clamping plate; 73. Bolt mounting hole; 101. Main shaft; 102. Slot body; 103. Ball screw; 104. Nut seat; 105. Carrier; 106. Column; 107. Guide column; 108. Locking nut; 109. Inner gear ring; 110. Upper gear; 111. Lower Gear; 112, adjusting screw; 113, outer gear ring; 114, cavity; 115, carrier plate; 116, adjusting rod; 117, first spring; 118, adjusting slot; 119, screw mounting plate; 120, adjusting nut; 121, limiting slider; 122, limiting slot; 123, longitudinal vertical rod; 501, secondary rotating shaft; 502, bearing sleeve; 503, connecting rib; 504, arc guide rail; 505, positioning screw; 506, main conical block; 507, secondary arc wedge block; 508, guide column; 509, fixing pin; 510, fixing slot; 511, second spring; 512, guide hole. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figure 1-Figure 5 The present invention provides a technical solution: an external fixation brace for a thigh fracture, comprising a thigh lateral splint 7 and a thigh medial splint 6, a support seat 2 is arranged on one side of the thigh lateral splint 7, an upper pelvic fixation plate 3 is arranged on one side surface of the support seat 2, a lower pelvic fixation plate 1 is also arranged on one side surface of the support seat 2, and an adjustment mechanism is also arranged inside the support seat 2;

[0036] The adjusting mechanism includes a main rotating shaft 101, which is rotatably arranged in a hole body, the hole body is arranged in the middle of a ball screw 103, the ball screw 103 is rotatably arranged in a slot body 102, the slot body 102 is arranged on a side surface of a support seat 2, a nut seat 104 is arranged on the ball screw 103, one end of the nut seat 104 is connected to a carrier 105, specifically, a linear slider is also arranged on one side of the nut seat 104, one end of the linear slider is slidably arranged in a linear slide groove, and the movement of the nut seat 104 drives the linear slider to move in the linear slide groove, thereby improving the movement of the nut seat 104 The guide property of the carrier 105 is connected to the lower pelvic fixing plate 1. The lower end of the main rotating shaft 101 is also provided with a connecting structure for controlling the rotation of the ball screw 103 and the adjusting screw 112. The connecting structure includes an upper gear 110. The upper gear 110 is arranged on one side of the main rotating shaft 101. The upper gear 110 can be intermittently meshed with the inner gear ring 109. The inner gear ring 109 is arranged on the lower side of the hole body. When the upper gear 110 is meshed with the inner gear ring 109, the ball screw 103 can be driven to rotate through the rotation of the main rotating shaft 101, and the position of the lower pelvic fixing plate 1 can be adjusted.

[0037] First, fit the upper pelvic fixing plate 3 to the patient's waist and make the upper pelvic fixing plate 3 stuck on the upper side of the patient's pelvis, and then adjust the lower pelvic fixing plate 1 according to the lower position of the patient's pelvis. At this time, the upper gear 110 and the inner gear ring 109 are in a meshing state, and the main rotating shaft 101 is rotated. The main rotating shaft 101 drives the upper gear 110 to rotate, and the upper gear 110 drives the inner gear ring 109 to rotate. The inner gear ring 109 drives the ball screw 103 to rotate, and the nut seat 104 moves to drive the carrier 105 to move, and the carrier 105 moves to drive the lower pelvic fixing plate 1 to move. After the lower pelvic fixing plate 1 moves to the lower side of the patient's pelvis, fit the lower pelvic fixing plate 1 to the lower part of the pelvis, and then fix the upper pelvic fixing plate 3 and the lower pelvic fixing plate 1 to the patient's pelvis through the upper fixing strap 4.

[0038] Specifically, a guide column 107 is also provided on the lower pelvic fixing plate 1. The guide column 107 is movably arranged in the guide column hole. The guide column hole is arranged on one side of the upper pelvic fixing plate 3. A locking nut 108 is also provided on the guide column 107. When the lower pelvic fixing plate 1 moves, the guide column 107 is driven to move in the guide column hole. When the upper pelvic fixing plate 3 and the lower pelvic fixing plate 1 are positioned, the locking nut 108 is tightened to lock the upper pelvic fixing plate 3 and the lower pelvic fixing plate 1 for a second time.

[0039] As a specific embodiment of this application, please refer to Figure 2-Figure 6The adjusting screw 112 is rotatably arranged in the cavity 114, one end of the adjusting screw 112 is rotatably arranged in the screw mounting plate 119, the screw mounting plate 119 is arranged on one side of the cavity 114, the cavity 114 is arranged on one side of the support seat 2, an adjusting nut 120 is arranged on the adjusting screw 112, and the adjusting nut 120 is connected to the outer thigh splint 7 through a connecting assembly, an outer gear ring sleeve 113 is arranged at the bottom of the main rotating shaft 101, and the outer gear ring sleeve 113 can be intermittently meshed with the lower gear 111, and the lower gear 111 is arranged on one side of the adjusting screw 112, and the outer gear ring sleeve 113 is connected to the lower gear 111 through the outer gear ring sleeve 113. 1, can control the rotation of the adjusting screw 112, one end of the main shaft 101 is rotatably connected with the carrier 115 through a ball bearing, the carrier 115 is arranged on one side of the cavity 114, an adjusting rod 116 is arranged on the upper side of the carrier 115, the adjusting rod 116 is movably arranged in the adjusting groove 118, the adjusting groove 118 is arranged on one side surface of the cavity 114, a first spring 117 is arranged on one side surface of the adjusting groove 118, one end of the first spring 117 is connected with the adjusting rod 116, which can ensure the stability of the main shaft 101 when rotating, and can make the main shaft 101 quickly reset and move.

[0040] A longitudinal rod 123 is provided on one side surface of the adjusting nut 120 , one end of the longitudinal rod 123 is connected to the column 106 , and one end of the column 106 is connected to the outer thigh splint 7 . The movement of the adjusting nut 120 can drive the outer thigh splint 7 to move.

[0041] After the upper pelvic fixing plate 3 is fixed to the lower pelvic fixing plate 1, the position of the lateral thigh splint 7 is adjusted according to the position of the patient's femoral fracture, and the main rotating shaft 101 is pushed. The main rotating shaft 101 moves downward in the ball screw 103, and the main rotating shaft 101 drives the upper gear 110 and the outer gear ring 113 to move downward at the same time. The main rotating shaft 101 drives the carrier plate 115 to move downward, and the carrier plate 115 drives the adjustment rod 116 to move in the adjustment groove 118 and stretch the first spring 117. When the outer gear ring 113 is engaged with the lower gear 111, the upper gear 110 is separated from the inner gear ring 109, and then the main rotating shaft 101 is rotated, and the main rotating shaft 101 is rotated. 01 drives the outer gear ring 113 to rotate, the outer gear ring 113 drives the adjusting screw 112 to rotate, the adjusting nut 120 drives the longitudinal rod 123 to move, the longitudinal rod 123 drives the column 106 to move, the movement of the column 106 drives the outer thigh splint 7 to connect, and makes the center position of the outer thigh splint 7 at the position of the femoral fracture. After the adjustment is completed, the first spring 117 drives the adjusting rod 116 to reset and make the upper gear 110 mesh with the inner gear ring 109 again, and then the inner and outer sides of the patient's thigh are fixed through the inner thigh splint 6 and the outer thigh splint 7, thereby fixing the patient's pelvis and thigh.

[0042] Furthermore, a limiting slider 121 is provided on the outer surface of the adjusting nut 120, and one end of the limiting slider 121 is slidably provided in a limiting groove 122. The limiting groove 122 is provided on one side surface of the cavity 114. When the adjusting screw 112 rotates, the adjusting nut 120 is driven to move along the adjusting screw 112. The movement of the adjusting nut 120 drives the limiting slider 121 to move in the limiting groove 122, thereby improving the guiding property of the adjusting nut 120 when moving.

[0043] Furthermore, the upper pelvic fixing plate 3 and the lower pelvic fixing plate 1 are both arc-shaped structures, and a fixing strap 4 is provided on one side of the upper pelvic fixing plate 3 and the lower pelvic fixing plate 1 to fix the upper pelvic fixing plate 3 and the lower pelvic fixing plate 1.

[0044] As a specific embodiment of this application, please refer to Figure 7-Figure 10 A groin positioning mechanism 5 is arranged on one side of the lower pelvic fixing plate 1, and the lower pelvic fixing plate 1 is connected to the outer thigh splint 7 through the groin positioning mechanism 5. The groin positioning mechanism 5 includes a bearing sleeve 502, and the bearing sleeve 502 is rotatably arranged on one side of the lower pelvic fixing plate 1 through the secondary rotating shaft 501. A connecting rib 503 is movably arranged in the bearing sleeve 502, and a guide column 508 is arranged at one end of the connecting rib 503. The guide column 508 is movably arranged in an arc guide rail 504, and the arc guide rail 504 is arranged on the surface of one side of the outer thigh splint 7. When the position of the lower pelvic fixing plate 1 or the outer thigh splint 7 is adjusted, the bearing sleeve 502 can rotate automatically, and the connecting rib 503 can automatically move and adjust the angle.

[0045] A positioning screw 505 is provided on one side of the connecting rib 503, and a main conical block 506 is provided on one end of the positioning screw 505. The main conical block 506 is fitted with a secondary arc wedge block 507, and the secondary arc wedge block 507 is provided at one end of a fixing pin 509. The fixing pin 509 is movably provided in a guide hole 512, and the guide hole 512 is provided on a guide column 508. A second spring 511 is sleeved on the fixing pin 509, and one end of the second spring 511 is connected to the fixing pin 509, and the other end of the second spring 511 is connected to the guide hole 512. One end of the fixing pin 509 is clamped in a fixing groove 510, and the fixing grooves 510 are provided on both sides of the arc guide rail 504, so as to lock and fix the connecting rib 503, and at the same time fix the lower pelvic fixing plate 1 and the thigh lateral splint 7, thereby positioning the patient's hip joint and thigh.

[0046] When the lower pelvic fixing plate 1 or the outer thigh splint 7 moves, the bearing sleeve 502 rotates on the lower pelvic fixing plate 1 through the secondary rotating shaft 501, and the connecting rib 503 moves in the bearing sleeve 502, and the connecting rib 503 drives the guide column 508 to move in the arc guide rail 504. After the lower pelvic fixing plate 1 is fixed to the outer thigh splint 7, the positioning screw 505 is rotated, and the positioning screw 505 drives the main conical block 506 to move and rotate. When the main conical block 506 After being fitted with the secondary arc wedge block 507, the main conical block 506 drives the secondary arc wedge block 507 to move, and the secondary arc wedge block 507 drives the fixing pin 509 to move, and the fixing pin 509 is inserted into the corresponding fixing groove 510, and the connecting rib 503 is fixed. By fixing the connecting rib 503, the lower pelvic fixing plate 1 and the outer thigh splint 7 are fixed, and then the patient's hip joint and thigh are fixed to prevent the thigh from moving, thereby ensuring the patient's subsequent recovery.

[0047] As a specific embodiment of this application, please refer to Figure 11-Figure 12 Inner clamping plates 63 are provided on both sides of the inner thigh splint 6, and fixing bolts 62 are provided on the inner clamping plates 63. One end of the fixing bolts 62 corresponds to the bolt mounting holes 73. The bolt mounting holes 73 are evenly arranged on one side of the outer clamping plates 72. The outer clamping plates 72 are arranged on both sides of the outer thigh splint 7, so that the outer thigh splint 7 and the inner thigh splint 6 can be fixed on both sides of the femoral fracture, and the femoral fracture position can be quickly fixed.

[0048] After the outer thigh splint 7 is positioned on the outer side of the patient's thigh, the inner thigh splint 6 is fitted against the inner side of the patient's thigh, and two sets of fixing bolts 62 are located on both sides of the femoral fracture and passed through the corresponding bolt mounting holes 73, and then the outer thigh splint 7 is connected and fixed with the inner thigh splint 6.

[0049] Specifically, lower fixing straps 71 are also provided on both sides of the outer clamping plate 72, and the lower fixing straps 71 correspond to the strap positioning openings 64, and a magic hook portion 61 is also provided on the inner thigh splint 6. When the outer thigh splint 7 is fixed to the inner thigh splint 6, the lower fixing strap 71 is passed through the corresponding strap positioning opening 64, and the fixing strap is folded back, passed around the back of the outer thigh splint 7, and then bonded and fixed to the magic hook portion 61, thereby performing a secondary fixation on the inner thigh splint 6 and the outer thigh splint 7 to improve their fixing stability.

[0050] In the present application, breathable cotton pads are arranged on the surfaces of the upper pelvic fixation plate 3, the lower pelvic fixation plate 1, the inner thigh splint 6 and the outer thigh splint 7 in contact with the patient's skin, which ensures breathability and avoids the occurrence of skin compression injuries of the patient.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thigh fracture external fixation brace, comprising a thigh lateral splint (7) and a thigh medial splint (6), characterized in that: A support seat (2) is arranged on one side of the outer thigh splint (7), an upper pelvic fixing plate (3) is arranged on one side surface of the support seat (2), a lower pelvic fixing plate (1) is also arranged on one side surface of the support seat (2), and an adjustment mechanism for controlling the positions of the lower pelvic fixing plate (1) and the outer thigh splint (7) is also arranged inside the support seat (2); The adjusting mechanism comprises a main rotating shaft (101), the main rotating shaft (101) is rotatably arranged in a hole body, the hole body is arranged in the middle of a ball screw (103), the ball screw (103) is rotatably arranged in a slot body (102), the slot body (102) is arranged on a side surface of a support seat (2), a nut seat (104) is arranged on the ball screw (103), one end of the nut seat (104) is connected to a carrier (105), and the carrier (105) is connected to The main shaft (101) is connected to the lower pelvic fixing plate (1), and a connecting structure for controlling the rotation of the ball screw (103) and the adjusting screw (112) is also provided at the lower end of the main shaft (101). The adjusting screw (112) is rotatably arranged in a cavity (114), and the cavity (114) is arranged on one side of the support seat (2). An adjusting nut (120) is arranged on the adjusting screw (112), and the adjusting nut (120) is connected to the outer thigh splint (7) through a connecting component. The connection structure comprises an upper gear (110), the upper gear (110) is arranged on one side of the main shaft (101), the upper gear (110) can be intermittently meshed with an inner gear ring (109), and the inner gear ring (109) is arranged on the lower side of the hole body; The connection structure further comprises an outer gear ring (113), the outer gear ring (113) is arranged at the bottom of the main shaft (101), the outer gear ring (113) can be intermittently meshed with a lower gear (111), and the lower gear (111) is arranged on one side of the adjusting screw (112); Wherein, a groin positioning mechanism (5) is provided on one side of the lower pelvic fixing plate (1), and the lower pelvic fixing plate (1) is connected to the outer thigh splint (7) via the groin positioning mechanism (5).

2. The external fixation brace for femoral fracture according to claim 1, characterized in that: One end of the main rotating shaft (101) is rotatably connected to a carrier plate (115) via a ball bearing; the carrier plate (115) is arranged on one side of the cavity (114); an adjusting rod (116) is arranged on the upper side of the carrier plate (115); the adjusting rod (116) is movably arranged in an adjusting groove (118); the adjusting groove (118) is arranged on a surface of one side of the cavity (114); a first spring (117) is arranged on a surface of one side of the adjusting groove (118); one end of the first spring (117) is connected to the adjusting rod (116).

3. The external fixation brace for femoral fracture according to claim 1, characterized in that: A longitudinal upright rod (123) is arranged on one side surface of the adjusting nut (120), one end of the longitudinal upright rod (123) is connected to the upright column (106), and one end of the upright column (106) is connected to the outer thigh splint (7).

4. The external fixation brace for femoral fracture according to claim 3, characterized in that: A limiting slide block (121) is disposed on the outer surface of the adjusting nut (120), one end of the limiting slide block (121) is slidably disposed in a limiting slide groove (122), and the limiting slide groove (122) is disposed on a side surface of the cavity (114).

5. The femoral fracture external fixation brace according to claim 1, characterized in that: The upper pelvic fixing plate (3) and the lower pelvic fixing plate (1) are both arc-shaped structures, and a fixing strap (4) is provided on one side of the upper pelvic fixing plate (3) and the lower pelvic fixing plate (1).

6. The external fixation brace for femoral fracture according to claim 1, characterized in that: The groin positioning mechanism (5) comprises a bearing sleeve (502), the bearing sleeve (502) being rotatably arranged on one side of the lower pelvic fixing plate (1) via a secondary rotating shaft (501), a connecting rib (503) being movably arranged in the bearing sleeve (502), a guide column (508) being arranged at one end of the connecting rib (503), the guide column (508) being movably arranged in an arc guide rail (504), and the arc guide rail (504) being arranged on one side surface of the outer thigh splint (7).

7. The external fixation brace for femoral fracture according to claim 6, characterized in that: A positioning screw (505) is arranged on one side of the connecting rib (503), and a main conical block (506) is arranged on one end of the positioning screw (505). The main conical block (506) is fitted with a secondary arc wedge block (507), and the secondary arc wedge block (507) is arranged on one end of a fixing pin (509). The fixing pin (509) is movably arranged in a guide hole (512), and a second spring (511) is sleeved on the fixing pin (509), and one end of the second spring (511) is connected to the fixing pin (509), and the other end of the second spring (511) is connected to the guide hole (512), and one end of the fixing pin (509) is clamped in a fixing groove (510), and the fixing grooves (510) are arranged on both sides of the arc guide rail (504).

8. The external fixation brace for femoral fracture according to claim 1, characterized in that: Inner clamping plates (63) are arranged on both sides of the inner thigh splint (6), and fixing bolts (62) are arranged on the inner clamping plates (63). One end of the fixing bolts (62) corresponds to the bolt mounting holes (73), and the bolt mounting holes (73) are evenly arranged on one side of the outer clamping plates (72). The outer clamping plates (72) are arranged on both sides of the outer thigh splint (7).

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