CN114145898A

CN114145898A - Traction reduction maintaining fixer for hip fracture

Info

Publication number: CN114145898A
Application number: CN202111471096.6A
Authority: CN
Inventors: 王向鹏
Original assignee: Zhengzhou Ninth People's Hospital
Current assignee: Zhengzhou Ninth People's Hospital
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-08

Abstract

The application relates to the technical field of fracture surgery fixation, in particular to a hip fracture traction reduction maintaining fixator which comprises a waist fixing piece, a thigh fixing piece, a shank fixing piece and a foot fixing piece which are fixedly connected, wherein the thigh fixing piece, the shank fixing piece and the foot fixing piece are fixedly connected; a traction device is arranged between the thigh fixing piece and the waist fixing piece, the traction device comprises a push rod, an intermediate sleeve and a connecting rod, the push rod is rotatably mounted on the waist fixing piece through a supporting seat, the intermediate sleeve is connected with the push rod, the intermediate sleeve is connected with a driving device for driving the intermediate sleeve to rotate, one end of the connecting rod is inserted into the intermediate sleeve and is in threaded connection with the intermediate sleeve, an anti-rotation device is arranged on the connecting rod, and the connecting rod, the intermediate sleeve and the push rod are positioned on the same straight line; the connecting rod is connected with the thigh fixing piece. The utility model has the effect that the patient can turn over conveniently when the leg is pulled.

Description

Traction reduction maintaining fixer for hip fracture

Technical Field

The application relates to the technical field of fracture surgery fixation, in particular to a traction reduction maintaining fixator for hip fracture.

Background

Fracture of femoral head or pelvic bone is common fracture in clinic, reduction is performed through operation, the leg needs to be pulled after reduction, the purpose of traction is to maintain the reduction state, growth of the bone is facilitated, deformity caused by pulling of muscle on the bone is reduced, one type of leg traction is to apply traction force on skin, and the other type of leg traction is to directly apply traction force on the bone.

Patent application publication No. CN106618836A discloses a femoral fracture retractor, which comprises a base plate, fly leaf and curvature backup pad, the upper portion of bottom plate sets up the fly leaf, the upper portion right side fixedly connected with support column of fly leaf, the curvature backup pad is connected on fly leaf upper portion, the side fixedly connected with deflector about the curvature backup pad respectively, the right side fixedly connected with go-between of deflector that is located the right side, the right side wall upper portion fixedly connected with sleeve of support column, the screw rod is installed to telescopic lateral wall, telescopic inside is provided with the box prop, a plurality of pinholes have evenly been seted up on the box prop, the right-hand member fixedly connected with fixed pulley of box prop, the upper portion fixedly connected with auto-lock rotating device of fly leaf, auto-lock rotating device is through connecting rope and go-between looks fixed connection, the fixed pulley is passed to the connection rope, four lower part correspondence fixedly connected with fixing clamping devices of bottom plate. When the device is used, the legs of a patient are fixed on the curvature support plate, and the guide plate and the curvature support plate are pulled through the connecting rope.

However, the inventor of the above structure considers that the leg pulling time usually needs one month, the patient needs to perform the turning over movement to prevent the bed-lying complications, and the patient needs to take the leg off the curved support plate in the turning over care and then needs to fix the leg and the foot on the curved support plate in time to return to the lying position and keep the pulling state, which is inconvenient.

Disclosure of Invention

In order to facilitate the turning over of the legs during traction, the application provides a traction reduction maintaining fixer for hip fracture.

The application provides a hip fracture traction reduction maintenance fixator, which adopts the following technical scheme:

a traction reduction maintaining fixator for hip fracture comprises a waist fixing piece, a thigh fixing piece, a shank fixing piece and a foot fixing piece which are fixedly connected, wherein the thigh fixing piece, the shank fixing piece and the foot fixing piece are fixedly connected; a traction device is arranged between the thigh fixing piece and the waist fixing piece, the traction device comprises a push rod, an intermediate sleeve and a connecting rod, the push rod is rotatably mounted on the waist fixing piece through a supporting seat, the intermediate sleeve is connected with the push rod, the intermediate sleeve is connected with a driving device for driving the intermediate sleeve to rotate, one end of the connecting rod is inserted into the intermediate sleeve and is in threaded connection with the intermediate sleeve, an anti-rotation device is arranged on the connecting rod, and the connecting rod, the intermediate sleeve and the push rod are positioned on the same straight line; the connecting rod is connected with the thigh fixing piece.

Through adopting the above technical scheme, during the use, fixed thigh mounting on patient's shank, shank mounting and foot mounting, the waist mounting is connected and is had the waist at the patient, then when the cover rotates in the middle of the drive arrangement drive, middle cover and connecting rod threaded connection, the connecting rod stall under anti-rotating device's effect, and then make middle cover rotate for the connecting rod, and then make the connecting rod remove along the length direction of middle cover, and then can drive the thigh mounting, shank mounting and foot mounting pull patient's shank, simultaneously because be connected through draw gear with the waist mounting, and then need not dismantle when the patient stands up, make things convenient for the patient to stand up under the circumstances that the shank keeps the tractive.

Preferably, the waist fixing piece is provided with an air bag, and the air bag is arranged on the back of the waist fixing piece on the side provided with the traction device.

Through adopting above-mentioned technical scheme, the position installation gasbag of waist, the gasbag can support waist mounting at the gas filled in-process, can make patient's waist and leg lifting simultaneously when waist mounting supports, and then can be convenient for the patient stand up.

Preferably, one end of the push rod is provided with a force measuring sensor, the force measuring sensor is fixedly connected with the middle sleeve, the force measuring sensor is connected with a controller, and the controller is electrically connected with the driving device.

By adopting the technical scheme, the force measuring sensor is arranged between the push rod and the middle sleeve, when the middle sleeve draws the leg of the patient through the connecting rod, the force measuring sensor can measure the drawing force, and meanwhile, the controller is connected with the force measuring sensor, so that the controller automatically controls the driving device to adjust the drawing force of the patient in the whole treatment process.

Preferably, drive arrangement includes outer tooth cover, first worm wheel, first worm, first casing and driving motor, driving motor is connected with the controller electricity, driving motor fixes on first casing and is used for driving first worm to rotate, first worm wheel rotates and installs in first casing, middle cover is close to the one end in connecting rod and is provided with first spline tooth, middle cover inside be provided with be used for with first spline tooth complex tooth, first worm wheel and the coaxial fixed connection of outer tooth cover.

By adopting the technical scheme, when the driving motor drives the first worm to rotate, the first worm drives the first worm wheel to rotate, so that the first worm wheel can drive the outer gear sleeve to rotate, the outer gear sleeve can be connected with the first spline gear on the middle sleeve, and the driving motor can drive the middle sleeve to rotate.

Preferably, one end of the connecting rod close to the middle sleeve is provided with a transition sleeve in a sliding fit manner, and the transition sleeve is provided with second spline teeth which are the same as the first spline teeth; a spring for driving the transition sleeve to abut against the end part of the middle sleeve is arranged between the transition sleeve and the connecting rod; the first shell is in sliding fit with the waist fixing piece, an electromagnet for driving the first shell to slide along the length direction of the middle sleeve is mounted on the first shell, and the electromagnet is electrically connected with the controller.

Through adopting above-mentioned technical scheme, be provided with the second spline tooth on the transition cover, can make first spline tooth and second spline tooth be close to each other when the transition cover is under the effort of spring, the transition cover can be connected with the second spline tooth under the effect of electro-magnet simultaneously to the spring can prevent that the transition cover from colliding with the second spline tooth, and then the transition cover can drive middle cover and connecting rod simultaneously, makes patient's shank internal rotation's angle adjust.

Preferably, the rotation preventing device comprises a second worm wheel, a second worm and a second shell, the second shell is fixed on the waist fixing piece, the second worm is rotatably installed in the second shell, the second worm wheel is rotatably installed on the second shell, a sliding groove is formed in the side wall of the connecting rod and is in sliding fit with the second worm wheel, the second worm wheel is coaxially connected to the connecting rod, and the second worm is meshed with the first worm.

Through adopting above-mentioned technical scheme, when the connecting rod need not rotate, the auto-lock between second worm and the second worm wheel can prevent that the connecting rod from rotating, and when the connecting rod needs to rotate, accessible drive second worm makes second worm wheel and connecting rod rotate simultaneously, and then conveniently controls the motion of connecting rod.

Preferably, the first worm and the second worm are provided with a transmission device, the transmission device comprises a first bevel gear, a second bevel gear, intermediate shafts, a joint sleeve and a joint rod, the number of the intermediate shafts is two, one intermediate shaft is correspondingly and rotatably mounted on the first shell and coaxially and fixedly connected with an output shaft of the driving motor, the other intermediate shaft is correspondingly and rotatably mounted on the second shell, one intermediate shaft is correspondingly and coaxially and fixedly connected with a first bevel gear, the first worm and the second worm are respectively provided with a second bevel gear, and the second bevel gears are meshed with the first bevel gears; the coupling sleeve and the coupling rod are each fixed to an intermediate shaft, and the coupling sleeve is used for connecting the coupling rod.

Through adopting above-mentioned technical scheme, transmission includes clutch collar and joint pole, and the clutch collar moves along with first casing through installing on an jackshaft, and then when can making outer tooth cover and second spline tooth be connected, the clutch collar is connected with the joint pole, and when outer tooth cover and second spline tooth separate, clutch collar and joint pole separation make transmission conveniently drive the second worm to first worm and second worm can synchronous motion.

Preferably, adjustable connecting devices are arranged between the waist fixing piece and the thigh fixing piece and between the thigh fixing piece and the foot fixing piece, each adjustable connecting device comprises an inner screw, a nut and an outer sleeve, the outer sleeve is in threaded connection with the inner screw, and the nuts are in threaded connection with the inner screw and used for abutting against the end portions of the outer sleeves.

Through adopting above-mentioned technical scheme, the length accessible of interior screw rod and outer tube is loosened the nut and is adjusted, and then can make and adjust between waist mounting, thigh mounting and the foot mounting to the patient that adapts to not co-altitude uses.

Preferably, a connecting piece is arranged between the waist fixing piece and the thigh fixing piece, one end of the connecting piece is rotatably connected with the connecting rod through a bolt, the other end of the connecting piece is rotatably connected with the thigh fixing piece through a bolt, the central lines of the two bolts are vertically arranged, and a locking nut is connected to the bolt through threads.

Through adopting above-mentioned technical scheme, connecting piece one end passes through the bolt with the connecting rod and rotates and be connected, conveniently adjusts the abduction angle of patient's shank, and the connecting piece passes through the screw thread to be connected with the thigh mounting, makes things convenient for the patient to carry out the activity of half the state of lying, reduces the complication of lying in bed for a long time.

Preferably, the inside of waist mounting is provided with the inside lining that flexible material made, seted up the bleeder vent on the inside lining.

Through adopting above-mentioned technical scheme, the inside of waist mounting sets up the inside lining, and then can reduce the fixed local pressure that takes place of waist and tension, and the bleeder vent can conveniently dispel the heat simultaneously.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the waist fixing piece is connected to the waist of the patient, the connecting rod moves along the length direction of the middle sleeve, the thigh fixing piece, the shank fixing piece and the foot fixing piece can be driven to pull the legs of the patient, and meanwhile, the waist fixing piece is connected with the waist fixing piece through the pulling device, so that the patient does not need to be detached when turning over, and the patient can conveniently turn over under the condition that the legs are kept pulled;

2. a force measuring sensor is arranged between the push rod and the middle sleeve, when the middle sleeve draws the leg of the patient through the connecting rod, the force measuring sensor can measure the drawing force, and meanwhile, the controller is connected with the force measuring sensor, so that the controller automatically controls the driving device to adjust the drawing force of the patient in the whole treatment process;

3. through the clutch collar through installing on an jackshaft along with first casing removal, and then can make outer tooth cover and second spline tooth be connected the time, the clutch collar is connected with the engaging rod simultaneously, and when outer tooth cover and the separation of second spline tooth, clutch collar and engaging rod separated simultaneously.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of the installation structure of the pulling apparatus in the embodiment of the present application;

FIG. 3 is a schematic view of the inner structure of the outer gear sleeve cut away in the embodiment of the present application;

FIG. 4 is a schematic view of the connection structure of the connection rod and the intermediate sleeve in the embodiment of the present application;

FIG. 5 is a schematic view of a partially exploded structure of a pulling device in an embodiment of the present application;

fig. 6 is a schematic view of the mounting structure of the transmission device in the embodiment of the present application.

Description of reference numerals: 1. a waist fixing member; 11. a U-shaped sleeve; 12. tensioning the belt; 13. a liner; 14. air holes are formed; 21. a thigh mount; 22. a shank securing member; 23. a foot fixing member; 3. an adjustable connection device; 31. an inner screw rod; 32. a nut; 33. an outer sleeve; 4. a pulling device; 41. a push rod; 42. a middle sleeve; 421. a first spline tooth; 422. a threaded hole; 43. a connecting rod; 431. hexagonal prism holes; 432. a chute; 44. a supporting seat; 45. fixing a sleeve; 51. an angle sensor; 52. a force sensor; 53. a controller; 54. a display; 61. a connecting member; 62. a bolt; 63. locking the nut; 7. a drive device; 71. an outer gear sleeve; 72. a first worm gear; 73. a first worm; 74. a first housing; 75. a drive motor; 76. a slide bar; 77. a transition sleeve; 771. a second spline tooth; 78. a spring; 79. an electromagnet; 8. an anti-rotation device; 81. a second housing; 82. a second worm gear; 83. a second worm; 84. a protrusion; 9. a transmission device; 91. a first bevel gear; 92. a second bevel gear; 93. an intermediate shaft; 94. a joint sleeve; 95. an engagement lever; 10. an air bag.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a traction reduction maintaining fixer for hip fracture. Referring to fig. 1, comprising a waist fixing member 1, a thigh fixing member 21, a shank fixing member 22 and a foot fixing member 23, wherein the foot fixing member 23 is fixedly connected with the shank fixing member 22, an adjustable connecting device 3 is arranged between the shank fixing member 22 and the thigh fixing member 21, the adjustable connecting device 3 can be used for adjusting the distance between the shank fixing member 22 and the thigh fixing member 21, a pulling device 4 is arranged on the waist fixing member 1, the pulling device 4 is arranged on the waist fixing member 1, meanwhile, another adjustable connecting device 3 is connected on the pulling device 4 and is connected with the thigh fixing member 21 through the adjustable connecting device 3, further, the adjustable connecting device 3 can adjust the distance between the thigh fixing member 21 and the waist fixing member 1, so that the two adjustable connecting devices 3 can be used for being arranged on the legs of patients with different heights, and the pulling device 4 is used for pulling the legs of the patients after being arranged, to maintain the fracture in a reduced state.

Referring to fig. 1, the waist fixing member 1 includes two U-shaped sleeves 11, the two U-shaped sleeves 11 are respectively disposed at two sides of the waist of the patient, the U-shaped sleeves 11 are fastened and fixed by a fastening belt 12, and a lining 13 is disposed inside the U-shaped sleeves 11, the lining 13 is made of a flexible material, ventilation holes 14 are formed in the lining 13, the ventilation holes 14 can be used for perspiration and heat dissipation, and meanwhile, the lining 13 can reduce local pressure injury. The pulling device 4 is fixed in the middle outside of a U-shaped sleeve 11, the thigh fixing part 21 is also provided with a tightening strap 12, the thigh fixing part 21 is connected to the thigh of the patient by means of the tightening strap 12, and the adjustable connecting device 3 can be used to adjust the installation position of the thigh fixing part 21. The foot fixing member 23 is adapted to be attached to the sole of the foot of the patient, and the tightening strap 12 is connected to the foot fixing member 23, and the tightening strap 12 of the foot fixing member 23 is disposed at a position opposite to the foot fixing member 23, so that the foot fixing member 23 can be firmly connected to the foot of the patient.

Referring to fig. 1, the adjustable connecting device 3 includes an inner screw 31, a nut 32 and an outer sleeve 33, wherein one end of the inner screw 31 is threaded and inserted into the outer sleeve 33 to be in threaded connection with the outer sleeve 33, the nut 32 is in threaded connection with the inner screw 31, the nut 32 is abutted against the end of the outer sleeve 33 when being tightened, so that the connecting length of the inner screw 31 and the outer sleeve 33 is fixed, the outer sleeve 33 and the inner screw 31 can be prevented from loosening through the locking of the nut 32, and when the nut 32 is loosened, the inner screw 31 can be rotated to adjust the connecting length of the inner screw 31 and the outer sleeve 33, so that the adjustable connecting device can adapt to the heights of different people; the inner screw 31 of the adjustable connecting device 3 arranged between the foot fixing member 23 and the thigh fixing member 21 is fixed on the foot fixing member 23, and the outer sleeve 33 is fixed on the thigh fixing member 21; the inner screw 31 in the adjustable connecting means 3 arranged between the thigh mounts 21 is fixed to the thigh mount 21 and is formed integrally with an outer sleeve 33 on the thigh mount 21, while the outer sleeve 33 is connected to the pulling means 4.

Referring to fig. 1 and 2, the pulling device 4 comprises a push rod 41, an intermediate sleeve 42 and a connecting rod 43, the push rod 41, the intermediate sleeve 42 and the connecting rod 43 are in the same straight line, one end of the push rod 41 is provided with a support seat 44, and the support seat 44 is fixed on the lumbar fixing member 1; one end of the push rod 41 is rotatably connected to the support base 44, an angle sensor 51 is fixedly arranged on the support base 44, the angle sensor 51 is coaxially and fixedly connected with the push rod 41, and the angle sensor 51 can be used for measuring the rotating angle of the push rod 41. A load cell 52 is fixedly arranged at one end of the push rod 41 far away from the angle sensor 51, one end of the load cell 52 is fixedly connected with the push rod 41, and the other end of the load cell 52 is fixedly connected with one end of the intermediate sleeve 42, so that the load cell 52 can be used for measuring the extrusion force between the intermediate sleeve 42 and the push rod 41. A fixing sleeve 45 is arranged on the waist fixing piece 1, and the fixing sleeve 45 is fixed on the waist fixing piece 1; meanwhile, the middle sleeve 42 is arranged on the fixed sleeve 45 in a penetrating way, so that the middle sleeve 42 can rotate and slide relative to the fixed sleeve 45. One end of the connecting rod 43 is connected with the intermediate sleeve 42, the other end is provided with a connecting piece 61, one end of the connecting piece 61 is rotatably connected with the connecting rod 43 through a bolt 62, the other end is rotatably connected with the outer sleeve 33 connected with the thigh fixing part 21 through a bolt 62, and the bolt 62 is matched with a locking nut 63, and the connecting piece 61 can be fixed relative to the connecting rod 43 and the outer sleeve 33 by using the locking nut 63 and the bolt 62. The central lines of the two bolts 62 positioned at the two ends of the connecting piece 61 are vertically arranged and are both vertical to the central line of the connecting rod 43, and the abduction angle of the leg of the patient can be adjusted to reach abduction 15 degrees through one connecting piece 61; when the other connecting piece 61 is loosened, the upper half body of the patient can be lifted relative to the legs, so that the patient can be in a half lying state, and further complications caused by long-term bed lying of the patient are reduced. A controller 53 is mounted on the lumbar mount 1, a display 54 is connected to the controller 53, the controller 53 is electrically connected to the angle sensor 51, and the controller 53 is electrically connected to the load cell 52, so that the measured values of the angle sensor 51 and the load cell 52 can be displayed on the display 54.

Referring to fig. 3 and 4, a threaded hole 422 is formed in one end of the middle sleeve 42 close to the connecting rod 43, a center line of the threaded hole 422 coincides with a center line of the middle sleeve 42, one end of the connecting rod 43 is inserted into the middle sleeve 42 and is in threaded connection with the threaded hole 422, a driving device 7 is connected to the middle sleeve 42, the driving device 7 is used for driving the middle sleeve 42 to rotate relative to the connecting rod 43, the middle sleeve 42 can further drive the connecting rod 43 to move along the center line direction of the middle sleeve 42, the connecting rod 43 drives the thigh fixing piece 21 and the foot fixing piece 23 to pull the leg of the patient, and meanwhile, the pulling acting force can be measured through the force measuring sensor 52, so that the current pulling state is displayed on the display 54.

Referring to fig. 3 and 4, the driving device 7 includes an outer gear sleeve 71, a first worm gear 72, a first worm 73, a first housing 74 and a driving motor 75, the driving motor 75 is electrically connected to the controller 53, the first housing 74 is slidably connected to the lumbar mount 1 through a slide bar 76, the slide bar 76 is fixed to the lumbar mount 1, and a length direction of the slide bar 76 is parallel to a center line direction of the middle sleeve 42, a plurality of teeth are provided on an inner wall of the outer gear sleeve 71, the first worm gear 72 is provided inside the first housing 74 and is coaxially and fixedly connected with the outer gear sleeve 71, the outer gear sleeve 71 is rotatably installed on the first housing 74, the first worm 73 is rotatably installed on the first housing 74, the driving motor 75 is fixed to the first housing 74, and the driving motor 75 is used for driving the first worm 73 to rotate, the first worm 73 is engaged with the first worm gear 72, so that the first worm 73 drives the first worm gear 72 to rotate, the end of the middle sleeve 42 close to the connecting rod 43 is provided with a first spline tooth 421, the first spline tooth 421 is matched with the inner teeth of the outer gear sleeve 71, and then the outer gear sleeve 71 and the first worm wheel 72 can be driven to rotate simultaneously. A transition sleeve 77 is arranged at one end of the connecting rod 43 close to the middle sleeve 42, the transition sleeve 77 is in a hexagonal prism shape as a whole, and a hexagonal prism hole 431 is formed in the end part of the connecting rod 43 through sliding fit of the transition sleeve 77. Referring to fig. 5, a spring 78 is disposed in the hexagonal hole 431, one end of the spring 78 abuts against the connecting rod 43, the other end abuts against the transition sleeve 77, and the transition sleeve 77 makes one end of the transition sleeve 77 abut against one end of the outer gear sleeve 71 under the action of the spring 78; a second spline tooth 771 is provided at one end of the transition sleeve 77 abutting against the outer sleeve 71, and the second spline tooth 771 is the same as the first spline tooth 421. The first shell 74 is connected with an electromagnet 79, the electromagnet 79 is electrically connected with the controller 53, the end of the electromagnet 79 is fixed on the first shell 74, the output direction of the electromagnet 79 is parallel to the length direction of the sliding rod 76, and then when the electromagnet 79 works, the first shell 74 can be driven to slide along the length direction of the middle sleeve 42, so that the teeth inside the outer gear sleeve 71 are meshed with the first spline teeth 421 and the second spline teeth 771 or only meshed with the first spline teeth 421. When the teeth inside the outer gear sleeve 71 are only meshed with the first spline teeth 421, the driving motor 75 drives the outer gear sleeve 71 to rotate relative to the connecting rod 43, so that the connecting rod 43 adjusts the traction force of the leg of the patient, or the leg of the patient has enough traction force to reduce looseness. In addition, when the teeth on the outer gear sleeve 71 are engaged with the first spline teeth 421 and the second spline teeth 771, the driving motor 75 simultaneously drives the outer gear sleeve 71 and the connecting rod 43 to rotate, so that the legs of the patient are in an inward rotation state, and the inward rotation angle is measured by the angle sensor 51.

Referring to fig. 6, an anti-rotation device 8 is provided on the connecting rod 43, and when the anti-rotation device 8 is used to rotate the intermediate sleeve 42 relative to the connecting rod 43, the connecting rod 43 stops rotating around the center line of the connecting rod 43. The rotation preventing device 8 includes a second housing 81, a second worm wheel 82 and a second worm 83, the second housing 81 is fixed on the waist fixing member 1, the second worm wheel 82 is rotatably installed in the second housing 81, a sliding groove 432 is formed in an outer wall of the connecting rod 43, a length direction of the sliding groove 432 is parallel to a length direction of the connecting rod 43, the second worm wheel 82 is sleeved on the connecting rod 43, a protrusion 84 used for being clamped in the sliding groove 432 is arranged on an inner wall of the second worm wheel 82, the second worm wheel 82 can rotate along with the connecting rod 43, the second worm 83 is rotatably installed in the second housing 81, and the second worm 83 is meshed with the second worm wheel 82. When the intermediate sleeve 42 is required to rotate independently, the second worm wheel 82 is self-locked by the second worm 83 to prevent the connecting rod 43 from rotating. When the middle sleeve 42 and the connecting rod 43 need to rotate simultaneously, the first worm 73 and the second worm wheel 82 can rotate synchronously, and the condition of adjusting the internal rotation of the leg of the patient is further achieved.

Referring to fig. 3 and 6, a transmission device 9 is arranged between the first worm 73 and the second worm 83, the transmission device 9 includes a first bevel gear 91, a second bevel gear 92, two intermediate shafts 93, a joint sleeve 94 and a joint rod 95, one intermediate shaft 93 is rotatably mounted on the first housing 74, the other intermediate shaft 93 is rotatably mounted on the second housing 81, one first bevel gear 91 is correspondingly fixed on one intermediate shaft 93, the first bevel gear 91 is coaxially arranged with the intermediate shaft 93, one second bevel gear 92 is coaxially fixed on the first worm 73, and the other second bevel gear 92 is coaxially fixed on the second worm 83; a first bevel gear 91 is correspondingly meshed with a second bevel gear 92, and two intermediate shafts 93 are coaxially arranged; and the end of one intermediate shaft 93 is coaxially fixed with a joint sleeve 94, the end of the other intermediate shaft 93 is coaxially fixed with a joint rod 95, and the joint rod 95 is in a polygonal shape, and can be a decaprism. The engaging sleeve 94 is opposite the engaging rod 95 and the engaging rod 95 is for a sliding fit within the engaging sleeve 94; an output shaft of the drive motor 75 is coaxially and fixedly connected to an intermediate shaft 93 mounted on the first housing 74. When the outer toothed sleeve 71 moves the teeth inside the outer toothed sleeve 71 away from the second spline teeth 771 under the action of the electromagnet 79, the engaging sleeve 94 moves away from the engaging rod 95, and when the teeth inside the outer toothed sleeve 71 are separated from the second spline teeth 771, the engaging sleeve 94 is separated from the engaging rod 95, and further when the driving motor 75 operates, the power of the driving motor 75 is not transmitted to the second worm 83 through the engaging rod 95; in addition, when the teeth inside the outer gear sleeve 71 are meshed with the second spline teeth 771, the engaging sleeve 94 is matched with the engaging rod 95, and when the driving motor 75 works, the power of the driving motor 75 is synchronously output to the first worm 73 and the second worm 83 through the two intermediate shafts 93 simultaneously, and the first worm 73 and the second worm 83 synchronously rotate, so that the intermediate shafts 93 and the connecting rods 43 can synchronously rotate.

Referring to fig. 1, the air bag 10 is provided on the outer wall of the waist fixing member 1 and the lower leg fixing member 22, the air bag 10 is located on the back of the waist fixing member 1 on the side where the pulling device 4 is installed, and when the air bag 10 is inflated, the waist fixing member 1 and the lower leg fixing member 22 are pushed up by the air bag 10, so that the legs of the patient can be simultaneously pushed up along with the waist fixing member 1, and the patient can lean on his side conveniently, and complications caused by long-term bed rest can be reduced.

The working process of the embodiment:

firstly, when the leg tension of the patient is adjusted, the controller 53 drives the electromagnet 79 to work, so that the first shell 74 drives the outer toothed sleeve 71 to move along the length direction of the outer toothed sleeve 71, the teeth inside the outer toothed sleeve 71 are separated from the second spline teeth 771, the driving motor 75 drives the first worm 73 to rotate, at this time, due to the self-locking effect between the second worm wheel 82 and the second worm 83, the second worm wheel 82 can prevent the connecting rod 43 from rotating, the connecting rod 43 is in threaded connection with the middle sleeve 42, and then the middle sleeve 42 rotates relative to the connecting rod 43 under the condition that the first worm wheel 72 rotates, so that the connecting rod 43 can move along the length direction of the middle sleeve 42, and the leg tension of the patient can be adjusted; in addition, when the internal rotation angle of the leg of the patient needs to be adjusted, the controller 53 drives the electromagnet 79 to operate, so that the electromagnet 79 pushes the second housing 81, further, the teeth inside the outer sleeve teeth can be simultaneously meshed with the first spline teeth 421 and the second spline teeth 771, further, the second housing 81 can also be moved to enable the engaging sleeve 94 to be meshed with the engaging rod 95, and further, under the action of the driving motor 75, the first worm 73 and the second worm 83 synchronously rotate, so that the internal rotation angle of the leg of the patient is adjusted.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A traction reduction maintaining fixer for hip fracture is characterized in that: the waist fixing piece (1), the thigh fixing piece (21), the shank fixing piece (22) and the foot fixing piece (23) are fixedly connected, and the thigh fixing piece (21), the shank fixing piece (22) and the foot fixing piece (23) are fixedly connected; a traction device (4) is arranged between the thigh fixing piece (21) and the waist fixing piece (1), the traction device (4) comprises a push rod (41), a middle sleeve (42) and a connecting rod (43), the push rod (41) is rotatably mounted on the waist fixing piece (1) through a supporting seat (44), the middle sleeve (42) is connected with the push rod (41), the middle sleeve (42) is connected with a driving device (7) for driving the middle sleeve (42) to rotate, one end of the connecting rod (43) is inserted into the middle sleeve (42) and is in threaded connection with the middle sleeve (42), an anti-rotation device (8) is arranged on the connecting rod (43), and the connecting rod (43), the middle sleeve (42) and the push rod (41) are positioned on the same straight line; the connecting rod (43) is connected with the thigh fixing part (21).

2. The traction reduction maintenance fixator for hip fracture according to claim 1, wherein: the waist fixing piece (1) is provided with an air bag (10), and the air bag (10) is arranged on the back of one side, provided with the traction device (4), of the waist fixing piece (1).

3. The traction reduction maintenance fixator for hip fracture according to claim 2, wherein: and a force measuring sensor (52) is installed at one end of the push rod (41), the force measuring sensor (52) is fixedly connected with the middle sleeve (42), the force measuring sensor (52) is connected with a controller (53), and the controller (53) is electrically connected with the driving device (7).

4. The traction reduction maintenance fixator for hip fractures according to claim 3, wherein: drive arrangement (7) are including outer tooth cover (71), first worm wheel (72), first worm (73), first casing (74) and driving motor (75), driving motor (75) are connected with controller (53) electricity, driving motor (75) are fixed on first casing (74) and are used for driving first worm (73) and rotate, first worm wheel (72) are rotated and are installed in first casing (74), middle cover (42) are close to the one end of connecting rod (43) and are provided with first spline tooth (421), middle cover (42) inside be provided with be used for with first spline tooth (421) complex tooth, first worm wheel (72) and outer tooth cover (71) coaxial fixed connection.

5. The traction reduction maintenance fixator for hip fracture according to claim 4, wherein: one end of the connecting rod (43) close to the middle sleeve (42) is provided with a transition sleeve (77) in a sliding fit mode, and the transition sleeve (77) is provided with a second spline tooth (771) which is the same as the first spline tooth (421); a spring (78) used for driving the transition sleeve (77) to abut against the end part of the middle sleeve (42) is arranged between the transition sleeve (77) and the connecting rod (43); the first shell (74) is in sliding fit with the waist fixing piece (1), an electromagnet (79) used for driving the first shell (74) to slide along the length direction of the middle sleeve (42) is installed on the first shell (74), and the electromagnet (79) is electrically connected with the controller (53).

6. The traction reduction maintenance fixator for hip fracture according to claim 5, wherein: anti-rotation device (8) include second worm wheel (82), second worm (83) and second casing (81), and second casing (81) are fixed on waist mounting (1), second worm (83) rotate and install in second casing (81), and second worm wheel (82) rotate and install on second casing (81), seted up spout (432) on connecting rod (43) lateral wall and with second worm wheel (82) sliding fit, second worm wheel (82) coaxial coupling is on connecting rod (43), second worm (83) and first worm (73) meshing.

7. The traction reduction maintenance fixator for hip fracture according to claim 6, wherein: the first worm (73) and the second worm (83) are provided with a transmission device (9), the transmission device (9) comprises a first bevel gear (91), a second bevel gear (92), intermediate shafts (93), a joint sleeve (94) and a joint rod (95), two intermediate shafts (93) are arranged, one intermediate shaft (93) is correspondingly and rotatably mounted on the first shell (74) and coaxially and fixedly connected with an output shaft of the driving motor (75), the other intermediate shaft (93) is correspondingly and rotatably mounted on the second shell (81), one intermediate shaft (93) is correspondingly and coaxially and fixedly connected with a first bevel gear (91), the first worm (73) and the second worm (83) are respectively provided with a second bevel gear (92), and the second bevel gears (92) are meshed with the first bevel gears (91); the coupling sleeve (94) and the coupling rod (95) are each fastened to an intermediate shaft (93), and the coupling sleeve (94) is used for connecting the coupling rod (95).

8. The traction reduction maintenance fixator for hip fracture according to claim 1, wherein: the adjustable connecting device (3) is arranged between the waist fixing piece (1) and the thigh fixing piece (21) and between the thigh fixing piece (21) and the foot fixing piece (23), the adjustable connecting device (3) comprises an inner screw rod (31), a nut (32) and an outer sleeve (33), the outer sleeve (33) is in threaded connection with the inner screw rod (31), and the nut (32) is in threaded connection with the inner screw rod (31) and is used for abutting against the end part of the outer sleeve (33).

9. The traction reduction maintenance fixator for hip fracture according to claim 1, wherein: be provided with connecting piece (61) between waist mounting (1) and thigh mounting (21), the one end and connecting rod (43) of connecting piece (61) are passed through bolt (62) and are rotated and be connected, and the other end passes through bolt (62) with thigh mounting (21) and rotate and be connected to the central line of two bolts (62) sets up perpendicularly, threaded connection has lock nut (63) on bolt (62).

10. The traction reduction maintenance fixator for hip fracture according to claim 1, wherein: the waist fixing piece (1) is internally provided with a lining (13) made of flexible materials, and the lining (13) is provided with air holes (14).