Calcaneus traction fixing brace for ankle joint fracture

Abstract

The utility model relates to the technical field of medical traction fixing instruments, in particular to a calcaneus traction fixing brace for ankle fracture, which is characterized by comprising a foot and ankle supporting plate, a shank supporting plate, a first mounting seat, a second mounting seat, a traction driving mechanism and a one-way self-locking mechanism. The foot and ankle supporting plate is mounted on the first mounting seat, the shank supporting plate is mounted on the second mounting seat, notches are formed in the left side and the right side of the foot and ankle supporting plate, at least one bandage assembly is arranged on each of the foot and ankle supporting plate and the shank supporting plate, and the first mounting seat is slidably connected with the second mounting seat through a sliding assembly. The calcaneus traction device is easy to operate and convenient to use, can effectively ensure the stability and traction effect when a traction needle is used for calcaneus traction, is high in safety, good in comfort, high in adaptability and good in portability, brings convenience to a patient to get out of bed for use, has the function of actively applying traction, and is suitable for popularization and application. And the device can be well suitable for short-time traction when the patient gets out of bed.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical traction fixing apparatus technical field, specifically related to a kind of calcaneus traction fixing brace for ankle fracture. BACKGROUND

[0002] Ankle fracture is the common injury type in clinical orthopedics, often caused by high-energy injury, such as falling, traffic accident or sports injury, etc. For patients with ankle fracture, preoperative treatment is particularly critical, especially preoperative detumescence can effectively reduce the risk of surgery and improve surgical results. In clinical practice, lower limb calcaneus traction is commonly used as a preoperative detumescence method, which mainly applies traction force at the calcaneus site to maintain the lower limb in a certain traction state and promote swelling reduction to create conditions for surgery.

[0003] Currently, the main methods for lower limb calcaneus traction in clinical practice include: traditional bone traction needle combined with fixing device, implanting bone traction needle at the patient's calcaneus site, connecting traction rope and counterweight externally, and fixing traction direction and position through bedside traction frame. This method is relatively simple to operate and is a commonly used traction means in clinical practice. Some devices combine traction needle with fixing device by designing adjustable traction bracket and use mechanical structure to maintain traction force, reducing patient discomfort. However, there are still the following problems and deficiencies: 1. Instability of fixation: traditional traction devices rely on bedside frame for fixation, and patient's limbs are prone to traction direction deviation due to movement or body position change, causing foot to assume an external rotation state and affecting traction effect; 2. Poor patient comfort: traditional bone traction method requires patients to stay in bed for a long time, and the compression of soft tissues by the fixing device can cause discomfort and even skin damage; 3. Complicated operation and low efficiency; 4. Safety hazards: since the calcaneus traction needle is fixed in the bone tissue, if the fixing device is unstable, it may cause the traction needle to loosen or shift, increasing patient's pain and affecting treatment effect; 5. When patients feel uncomfortable after a long period of traction, they need to get out of bed for lower limb activity, go to the toilet or go for examination. The existing fixing device is not convenient for patients to use out of bed, and it also does not have the function of actively applying traction to the lower limb. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a calcaneus traction fixing brace for ankle fracture, which is simple to operate, easy to use, can effectively ensure the stability and traction effect when using the traction needle for calcaneus traction, has high safety, good comfort, strong adaptability, good portability, is convenient for patients to use out of bed, has the function of actively applying traction, and can well adapt to short-term traction use during patients' out-of-bed period.

[0005] To solve the above technical problems, the utility model adopts the technical scheme as follows: A calcaneus traction fixing support for ankle fracture, including foot and ankle support plate, shank support plate, first mounting seat, second mounting seat, traction drive mechanism and one-way self-locking mechanism, the foot and ankle support plate is L shape and is used for local wrapping foot and ankle and is fixedly installed on the first mounting seat, the shank support plate is used for local wrapping shank and is fixedly installed on the second mounting seat, the left and right sides of the foot and ankle support plate are all equipped with the notch corresponding with the ankle and used for making the traction needle pass through, the foot and ankle support plate and the shank support plate all are equipped with at least one binding belt assembly to respectively tightly bind and fix foot and ankle and shank, the first mounting seat is slidably connected with the second mounting seat through the sliding assembly, the traction drive mechanism is used to drive the first mounting seat to move relative to the second mounting seat, the one-way self-locking mechanism is used to one-way self-locking effect to the movement of the first mounting seat and allows the first mounting seat to move to the side direction away from the second mounting seat.

[0006] Further, the sliding assembly includes a strip-shaped slide rod and a sliding sleeve, the strip-shaped slide rod is in the shape of a cuboid, the sliding sleeve is fixedly arranged on the first mounting seat, the sliding sleeve is provided with a sliding hole matched with the strip-shaped slide rod, one end of the strip-shaped slide rod is fixedly arranged on the second mounting seat, and the other end of the strip-shaped slide rod passes through the sliding hole and is in sliding cooperation with the sliding sleeve.

[0007] Further, the traction drive mechanism includes a gear, a rack and a knob, the rack is fixedly arranged on one side surface of the strip-shaped slide rod and is arranged along the length direction, the sliding hole is provided with a drive hole communicated with the sliding hole and penetrating through the left and right side surfaces, one end of the rotating shaft of the knob extends into the drive hole and is rotationally connected with the sliding sleeve, the gear is arranged in the drive hole, is fixedly arranged on the rotating shaft and is in meshing with the rack.

[0008] Further, the rotating shaft is fixedly provided with an annular limiting block abutting against one side end surface of the sliding sleeve, and the rotating shaft is provided with a limiting plate abutting against the other side end surface of the sliding sleeve.

[0009] Further, the one-way self-locking mechanism includes a stopper pressing plate and an elastic member, the stopper pressing plate is hingedly connected with the sliding sleeve through a hinge shaft and makes both ends of the stopper pressing plate form a pressing end and a stop end respectively, the stop end of the stopper pressing plate is fixedly provided with a stopper sharp block, one side surface of the sliding sleeve is provided with a through hole communicated with the sliding hole and allowing the stopper sharp block to pass through, and the elastic member is used to always apply an elastic force on the stopper pressing plate to make the stopper sharp block be clamped between the teeth of the rack.

[0010] Further, the elastic member is a torsion spring, the torsion spring is sleeved on the hinge shaft, one straight torsion arm of the torsion spring abuts against the lower surface of the pressing end of the stopper pressing plate, and the other straight torsion arm of the torsion spring is clamped in the clamping hole of the sliding sleeve.

[0011] Further, the foot and ankle supporting plate is internally provided with a foot and ankle supporting cavity, and is further provided with a first pressure sore prevention hole.

[0012] Further, the inner surface of the foot and ankle supporting cavity is fixedly covered with a first flexible pad, and the inner surface of the calf supporting cavity is fixedly covered with a second flexible pad.

[0013] Further, the binding assembly comprises a binding belt and a Velcro, one side of the foot and ankle supporting plate and one side of the calf supporting plate are fixedly connected with the binding belt, the Velcro comprises a first hook surface and a first loop surface which are adhered to each other, the first hook surface is fixedly arranged on one side surface of the binding belt, and the bottom surface of the foot and ankle supporting plate and the bottom surface of the calf supporting plate are fixedly provided with the first loop surface.

[0014] Further, the first mounting seat comprises a first mounting plate and a first mounting block fixedly arranged at one end of the first mounting plate, the first mounting plate is locked and fixed to the bottom of the foot and ankle supporting plate through a first fastener, the second mounting seat comprises a second mounting plate and a second mounting block fixedly arranged at one end of the second mounting plate, and the second mounting plate is locked and fixed to the bottom of the calf supporting plate through a second fastener.

[0015] From the above description, the utility model provides a kind of calcaneus traction fixation brace for ankle fracture, with following beneficial effects: when using, the foot and ankle support plate of patient's foot and ankle can be first supported and local package fixed, the calf support plate of patient's calf can be supported and local package fixed, the foot and ankle support plate of patient's foot and ankle can be simultaneously connected by corresponding binding belt assembly, and the calf support plate of patient's calf can be supported, so as to play the role of fixing patient's lower limbs, when the traction needle passes through the slot on the foot and ankle support plate and the calcaneus of patient, and the calcaneus traction is carried out, the traction direction deviation caused by the movement or position change of patient's affected limb can be effectively avoided, and the stability and traction effect of traction are effectively ensured, and it is simple to operate, can improve use efficiency, and improve patient comfort, can play the stable and reliable fixation and support to patient's affected limb, effectively avoid the displacement or loosening of traction needle, to better ensure the safety of patient during traction treatment, reduce secondary injury, the calcaneus traction fixation brace can be customized according to the specific circumstances of different patients, with better adaptability, in addition, when patient is tractioned for a long time, needs to get out of bed to move lower limbs, go to toilet or go to examination, the calf support plate of patient's calf can be further connected by corresponding binding belt assembly, then the distance between foot and ankle support plate and calf support plate can be adjusted by operating traction drive mechanism, and the traction effect of patient's affected limb can be actively exerted, the traction force is relatively small, but can well adapt to short-time traction use during patient's getting out of bed, simultaneously, the further fixation of patient's affected limb can be conveniently carried out, and good portability can facilitate the getting out of bed use of patient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model for ankle fracture calcaneus traction fixation brace.

[0017] Figure 2 It is Figure 1 It is a partial enlarged view of A in the figure.

[0018] Figure 3 It is the connection structure schematic view of traction drive mechanism, one-way self-locking mechanism and sliding assembly.

[0019] Figure 4 It is the partial three-dimensional structure schematic view of foot and ankle support plate.

[0020] Figure 5 It is the use state schematic view of the utility model for ankle fracture calcaneus traction fixation brace.

[0021] In the figure: 1-foot and ankle support plate; 11-slot; 111-bar slot; 112-clamping groove; 12-foot and ankle support cavity; 13-first pressure ulcer prevention hole; 14-first flexible pad; 2-calf support plate; 21-calf support cavity; 22-second pressure ulcer prevention hole; 23-second flexible pad; 3-first mounting seat; 31-first mounting plate; 32-first mounting block; 4-second mounting seat; 41-second mounting plate; 42-second mounting block; 5-drawing driving mechanism; 51-gear; 52-rack; 53-knob; 531-rotation shaft; 5311-ring limiting block; 5312-limiting plate; 6-one-way self-locking mechanism; 61-stop pressing plate; 611-stop tip block; 62-elastic member; 63-hinge shaft; 7-buckle assembly; 71-buckle; 72-magic tape; 8-sliding assembly; 81-bar-shaped sliding rod; 82-sliding sleeve; 821-driving hole; 822-through hole; 91-foot; 92-ankle; 93-calf; 94-drawing needle. DETAILED DESCRIPTION

[0022] The utility model will be further described below through specific embodiment.

[0023] As Figures 1 to 5 shown, a calcaneus traction fixation brace for ankle fracture, the utility model discloses a foot and ankle support plate 1, calf support plate 2, first mounting seat 3, second mounting seat 4, traction driving mechanism 5 and one-way self-locking mechanism 6, the foot and ankle support plate 1 is L-shaped and is used for partial wrapping foot 91 and ankle 92 and is fixedly installed on first mounting seat 3, the calf support plate 2 is used for partial wrapping calf 93 and is fixedly installed on second mounting seat 4, both sides of foot and ankle support plate 1 are equipped with the slot 11 corresponding with ankle 92 and used to make that drawing needle 94 passes through, foot and ankle support plate 1 and second mounting seat 4 are slidably connected through sliding assembly 8, traction driving mechanism 5 is used to drive first mounting seat 3 moves relative to second mounting seat 4, one-way self-locking mechanism 6 is used to one-way self-locking effect to the movement of first mounting seat 3 and allows first mounting seat 3 to move to the side direction away from second mounting seat 4.

[0024] The relative sliding connection between the first mounting seat 3 and the second mounting seat 4 can be realized by the sliding assembly 8, the movement of the first mounting seat 3 relative to the second mounting seat 4 can be guided accordingly, and the stability and smoothness of the sliding of the first mounting seat 3 can be effectively ensured, so that the foot and ankle support plate 1 and the lower leg support plate 2 can approach or move away from each other, and when the first mounting seat 3 is moved away from the second mounting seat 4 by the traction driving mechanism 5, the foot and ankle support plate 1 is moved away from the lower leg support plate 2, and at the same time, the one-way self-locking mechanism 6 is arranged, so that the first mounting seat 3 cannot move to the side of the second mounting seat 4 during traction, that is, the foot and ankle support plate 1 cannot move to the side of the lower leg support plate 2, and the whole structure is simple, portable, convenient to operate, low in price, suitable for patients to use, and conducive to improving the rehabilitation efficiency and treatment effect.

[0025] In use, the foot and ankle support plate 1 can first support the patient's foot 91 and ankle 92 and be locally wrapped and fixed, the lower leg support plate 2 can support the patient's lower leg 93 and be locally wrapped and fixed, and at the same time, the foot and ankle support plate 1 can be tightly connected with the patient's foot 91 and ankle 92 by the corresponding binding assembly 7, and the lower leg support plate 2 can support the patient's lower leg 93, thereby fixing the patient's lower limbs. When the traction needle 94 passes through the patient's calcaneus through the slot 11 on the foot and ankle support plate 1 and performs calcaneal traction, the traction direction can be effectively prevented from deviating due to the movement or body position change of the patient's affected limb, and the stability and effect of traction can be effectively ensured. It is simple to operate, can improve the use efficiency, and can improve the patient's comfort. It can stably and reliably fix and support the patient's affected limb, effectively prevent the traction needle 94 from shifting or loosening, better ensure the safety of the patient during traction treatment, reduce secondary injury, and can be customized according to the specific conditions of different patients. It has better adaptability. In addition, when the patient needs to get out of bed for lower limb activity, go to the toilet or go to the examination after a long time of traction, the lower leg support plate 2 can be tightly connected with the patient's lower leg 93 by the corresponding binding assembly 7, and then the distance between the foot and ankle support plate 1 and the lower leg support plate 2 can be adjusted by operating the traction driving mechanism 5. The patient's affected limb can be actively subjected to a certain traction, the traction force is relatively small, but it can well adapt to the short-time traction during the patient's getting out of bed, and the patient's affected limb can be further fixed and portable, which can facilitate the patient's getting out of bed.

[0026] The sliding assembly 8 comprises a strip-shaped sliding rod 81 and a sliding sleeve 82, the sliding sleeve 82 is fixedly arranged on the first mounting base 3, the sliding sleeve 82 is provided with a sliding hole matched with the strip-shaped sliding rod 81, one end of the strip-shaped sliding rod 81 is fixedly arranged on the second mounting base 4, the other end of the strip-shaped sliding rod 81 passes through the sliding hole and is in sliding fit with the sliding sleeve 82, so that the first mounting base 3 and the second mounting base 4 can be connected as a whole and the relative sliding between them can be realized, and the sliding is smooth and smooth.

[0027] The traction driving mechanism 5 comprises a gear 51, a rack 52 and a knob 53, the rack 52 is fixedly arranged on one side surface of the strip-shaped sliding rod 81 and is arranged along the length direction, the sliding sleeve 82 is provided with a driving hole 821 communicated with the sliding hole and penetrating through the left and right side surfaces, one end of the rotating shaft 531 of the knob 53 extends into the driving hole 821 and is rotatably connected with the sliding sleeve 82, the gear 51 is arranged in the driving hole 821 and is fixedly arranged on the rotating shaft 531 and is engaged with the rack 52, when operating, the knob 53 can be rotated to drive the gear 51 on the rotating shaft 531 to rotate, and the gear 51 and the rack 52 are engaged and driven, so that the strip-shaped sliding rod 81 is driven to move relative to the gear 51, so that the first mounting base 3 is driven to move relative to the second mounting base 4, so that the foot and ankle supporting plate 1 is moved relative to the calf supporting plate 2, and the structure is simple and the operation is convenient.

[0028] The rotating shaft 531 is fixedly arranged with an annular limiting block 5311 on the outer circumferential surface, the annular limiting block 5311 abuts against one side end surface of the sliding sleeve 82, the rotating shaft 531 is provided with a limiting plate 5312 at the top end, the limiting plate 5312 abuts against the other side end surface of the sliding sleeve 82, so that the corresponding upper and lower limiting effects are achieved, so as to ensure that the rotating shaft 531 of the knob 53 cannot be separated from the driving hole 821 of the sliding sleeve 82, and the stability of the rotating connection between the rotating shaft 531 and the sliding sleeve 82 is effectively ensured.

[0029] The one-way self-locking mechanism 6 comprises a stop pressing plate 61 and an elastic member 62. The stop pressing plate 61 is hinged to the sliding sleeve 82 through a hinge shaft 63, and the two ends of the stop pressing plate 61 form a pressing end and a stop end respectively. A stop sharp block 611 is fixed to the stop end of the stop pressing plate 61. A through hole 822 is arranged on one side surface of the sliding sleeve 82, which is communicated with the sliding hole and allows the stop sharp block 611 to pass through. The elastic member 62 is used to always apply an elastic force to the stop sharp block 611 to make it clamped between the teeth of the rack 52. Preferably, the elastic member 62 is a torsion spring, which is sleeved on the hinge shaft 63. One straight torsion arm of the torsion spring abuts against the lower surface of the pressing end of the stop pressing plate 61, and the other straight torsion arm is clamped in the clamping hole of the sliding sleeve 82. When the first mounting base 3 moves towards the side close to the second mounting base 4, the stop end of the stop pressing plate 61 will be inclined downward due to the interaction between the teeth on the rack 52 and the stop sharp block 611, so that the stop sharp block 611 is clamped more tightly between the teeth of the rack 52, thereby achieving the one-way self-locking effect of the movement of the first mounting base 3. When the first mounting base 3 moves away from the second mounting base 4, the stop end of the stop pressing plate 61 will be inclined upward due to the interaction between the teeth on the rack 52 and the stop sharp block 611, so that the stop sharp block 611 is separated from the teeth of the rack 52, thereby allowing the first mounting base 3 to move away from the second mounting base 4. In addition, when the pressing end of the stop pressing plate 61 is pressed, the stop end of the stop pressing plate 61 will be inclined upward, and the stop sharp block 611 will be separated from the teeth of the rack 52, thereby releasing the one-way self-locking effect of the second mounting base 4, so as to allow the first mounting base 3 to move towards the side close to the second mounting base 4 under the driving of the traction driving mechanism 5, so that the foot and ankle supporting plate 1 moves towards the side close to the lower leg supporting plate 2, thereby reducing the distance between the foot and ankle supporting plate 1 and the lower leg supporting plate 2.

[0030] The foot and ankle supporting plate 1 is internally provided with a foot and ankle supporting cavity 12, which is adapted to the patient's foot 91 and ankle 92, so that the inner surface of the foot and ankle supporting cavity 12 is better attached to the foot 91 and ankle 92, which is conducive to further improving the stability of the connection between the foot and ankle supporting plate 1 and the patient's foot 91 and ankle 92. The foot and ankle supporting plate 1 is also provided with a first pressure sore prevention hole 13 to reduce the risk of pressure sores on the patient's Achilles tendon. The slot 11 includes a strip-shaped slot 111 extending through one side edge of the foot and ankle supporting plate 1 and a plurality of clamping grooves 112 spaced along the length direction of the strip-shaped slot 111. The clamping grooves 112 are communicated with the strip-shaped slot 111. Preferably, the number of clamping grooves 112 is 2-4, which facilitates the clamping of the traction needle 94 in the corresponding appropriate clamping groove 112, thereby further ensuring the stability of the traction position of the traction needle 94. The calf supporting plate 2 is internally provided with a calf supporting cavity 21, which is adapted to the patient's calf 93, so that the inner surface of the calf supporting cavity 21 is better attached to the calf 93, which is conducive to further improving the stability of the connection between the calf supporting plate 2 and the patient's calf 93. The calf supporting plate 2 is also provided with a second pressure sore prevention hole 22.

[0031] The inner surface of the foot and ankle supporting cavity 12 is fixedly covered with a first flexible pad 14, and the inner surface of the calf supporting cavity 21 is fixedly covered with a second flexible pad 23. The surface of the first flexible pad 14 and the second flexible pad 23 is provided with a plurality of micropores. Correspondingly, the first flexible pad 14 and the second flexible pad 23 can be made of cotton pad to further improve the comfort during wearing.

[0032] The binding assembly 7 includes a binding band 71 and a Velcro 72. One side of the foot and ankle supporting plate 1 and the calf supporting plate 2 is fixedly connected with the binding band 71. The Velcro 72 includes a first hook surface and a first hook surface that are mutually adhered and matched. One side surface of the binding band 71 is fixedly provided with the first hook surface, and the first hook surface completely covers one side surface of the binding band 71. The bottom surface of the foot and ankle supporting plate 1 and the calf supporting plate 2 is fixedly provided with the first hook surface. Thus, the foot and ankle supporting plate 1 and the patient's foot 91 and ankle 92, and the calf supporting plate 2 and the patient's calf 93 can be quickly connected and separated.

[0033] Preferably, the foot and ankle supporting plate 1 is provided with 2-3 binding assemblies 7, which effectively ensure the stability of the binding between the foot and ankle supporting plate 1 and the patient's foot 91 and ankle 92. The calf supporting plate 2 is provided with 2-3 binding assemblies 7, which effectively ensure the stability of the binding between the calf supporting plate 2 and the patient's calf 93.

[0034] The first mounting base 3 comprises a first mounting plate 31 and a first mounting block 32 fixed at one end of the first mounting plate 31, one end of the sliding sleeve 82 is fixed on the first mounting block 32, the first mounting plate 31 is locked and fixed on the bottom of the foot and ankle supporting plate 1 by first fasteners, the first fasteners are multiple, the first mounting plate 31 is arc-shaped and matches the shape of the bottom of the foot and ankle supporting plate 1, the connecting direction of the first mounting plate 31 is perpendicular to the length direction of the foot and ankle supporting plate 1, the second mounting base 4 comprises a second mounting plate 41 and a second mounting block 42 fixed at one end of the second mounting plate 41, one end of the strip-shaped sliding rod 81 is fixed on the second mounting block 42, the second mounting plate 41 is locked and fixed on the bottom of the calf supporting plate 2 by second fasteners, the second fasteners are multiple, the second mounting plate 41 is arc-shaped and matches the shape of the bottom of the calf supporting plate 2, the connecting direction of the second mounting plate 41 is perpendicular to the length direction of the calf supporting plate 2.

[0035] The above is only several specific embodiments of the present application, but the design concept of the present application is not limited thereto, and any non-essential modification of the present application by using the concept should be regarded as an infringement of the protection scope of the present application.

Claims

1. A calcaneal traction immobilization orthosis for ankle fractures, characterized in that: The device comprises a foot and ankle supporting plate, a calf supporting plate, a first mounting base, a second mounting base, a traction driving mechanism and a one-way self-locking mechanism, the foot and ankle supporting plate is in L shape and is used for wrapping the foot and ankle and is fixedly installed on the first mounting base, the calf supporting plate is used for wrapping the calf and is fixedly installed on the second mounting base, both sides of the foot and ankle supporting plate are provided with notches corresponding to the ankle and used for allowing the traction needle to pass through, at least one binding assembly is arranged on the foot and ankle supporting plate and the calf supporting plate to respectively bind and fix the foot and ankle and the calf, the first mounting base is slidably connected with the second mounting base through a sliding assembly, the traction driving mechanism is used for driving the first mounting base to move relative to the second mounting base, and the one-way self-locking mechanism is used for one-way self-locking the movement of the first mounting base and allowing the first mounting base to move to the side away from the second mounting base.

2. A calcaneal traction foot orthosis for ankle fracture according to claim 1, characterized in that: The sliding assembly comprises a strip-shaped sliding rod and a sliding sleeve, the strip-shaped sliding rod is in cuboid shape, the sliding sleeve is fixedly arranged on the first mounting base, the sliding sleeve is provided with a sliding hole matched with the strip-shaped sliding rod, one end of the strip-shaped sliding rod is fixedly arranged on the second mounting base, and the other end of the strip-shaped sliding rod passes through the sliding hole and is slidably connected with the sliding sleeve.

3. A calcaneal traction foot orthosis for ankle fracture according to claim 2, characterized in that: The traction driving mechanism comprises a gear, a rack and a knob, the rack is fixedly arranged on one side surface of the strip-shaped sliding rod and is arranged along the length direction of the strip-shaped sliding rod, the sliding hole is provided with a driving hole communicated with the sliding hole and penetrating through the left and right side surfaces of the sliding sleeve, one end of a rotating shaft of the knob extends into the driving hole and is rotatably connected with the sliding sleeve, and the gear is arranged in the driving hole, is fixedly arranged on the rotating shaft and is engaged with the rack.

4. A calcaneal traction foot orthosis for ankle fracture according to claim 3, characterized in that: An annular limiting block is fixedly arranged on the outer circumferential surface of the rotating shaft and abuts against one side end surface of the sliding sleeve, and a limiting plate is arranged on the top end of the rotating shaft and abuts against the other side end surface of the sliding sleeve.

5. A calcaneal traction foot orthosis for ankle fracture according to claim 3, wherein: The one-way self-locking mechanism comprises a stop pressing plate and an elastic member, the stop pressing plate is hingedly connected with the sliding sleeve through a hinge shaft and makes both ends of the stop pressing plate form a pressing end and a stop end respectively, a stop sharp block is fixedly arranged on the stop end of the stop pressing plate, one side surface of the sliding sleeve is provided with a through hole communicated with the sliding hole and allowing the stop sharp block to pass through, and the elastic member is used for always applying an elastic force to the stop pressing plate to make the stop sharp block abut against the teeth of the rack.

6. A calcaneal traction foot orthosis for ankle fracture according to claim 5, characterized in that: The elastic member is a torsion spring, the torsion spring is sleeved on the hinge shaft, one straight torsion arm of the torsion spring abuts against the lower surface of the pressing end of the stop pressing plate, and the other straight torsion arm of the torsion spring is clamped in a clamping hole of the sliding sleeve.

7. A calcaneal traction foot orthosis for ankle fracture according to claim 1, characterized in that: The foot and ankle supporting plate is provided with a foot and ankle supporting cavity, the foot and ankle supporting plate is further provided with a first pressure sore prevention hole, the notch comprises a strip-shaped groove penetrating through one side edge of the foot and ankle supporting plate and a plurality of clamping grooves arranged along the length direction of the strip-shaped groove and spaced apart, the clamping grooves are communicated with the strip-shaped groove, the calf supporting plate is provided with a calf supporting cavity, and the calf supporting plate is further provided with a second pressure sore prevention hole.

8. A calcaneal traction foot orthosis for ankle fracture according to claim 7, characterized in that: The inner surface of the foot and ankle supporting cavity is fixedly covered with a first flexible pad, and the inner surface of the calf supporting cavity is fixedly covered with a second flexible pad.

9. A calcaneal traction foot orthosis for ankle fracture according to claim 1, characterized in that: The binding assembly comprises a binding band and a Velcro, one side surface of the foot and ankle supporting plate and one side surface of the calf supporting plate are fixedly connected with the binding band, the Velcro comprises a first hook surface and a first loop surface which are adhered to each other, the first hook surface is fixedly arranged on one side surface of the binding band, and the first loop surface is fixedly arranged on the bottom surface of the foot and ankle supporting plate and the calf supporting plate.

10. A calcaneal traction foot orthosis for ankle fracture according to claim 1, characterized in that: The first mounting seat comprises a first mounting plate and a first mounting block fixedly arranged at one end of the first mounting plate, the first mounting plate is locked and fixed on the bottom of the foot and ankle supporting plate through a first fastener, the second mounting seat comprises a second mounting plate and a second mounting block fixedly arranged at one end of the second mounting plate, and the second mounting plate is locked and fixed on the bottom of the calf supporting plate through a second fastener.

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