Traction shoe sleeve and traction device

Abstract

The utility model discloses a traction boot cover and a traction device, which comprise an outer shell cover and an inner fixing cover, the inner fixing cover covers a foot and a shank, and the outer shell cover covers and tightens the inner fixing cover. The traction boot cover further comprises a binding belt which is used for wrapping and tightening the inner fixing cover. The binding belt is provided with a plurality of binding assemblies, each binding assembly comprises two corresponding binding arms and a connecting part, the two corresponding binding arms surround the inner fixing sleeve and then are fixed through the connecting parts, pressure is applied to a plurality of parts of the inner fixing sleeve, and friction force between the inner fixing sleeve and the feet and the shanks of a user is increased. And the surface of the bandage also increases the friction force between the bandage and the outer side surface of the inner fixing sleeve and the inner side surface of the shell sleeve. By using the bandage, the feet and the shanks of the user are prevented from loosening or falling off in the traction process.

Description

Technical Field

[0001] This utility model relates to the field of lower limb traction equipment for hip joint surgery, specifically to a traction boot cover and traction device. Background Technology

[0002] During hip surgery, a traction device is used to open the hip joint. The traction device includes a traction bed, a traction device, and a traction boot cover. The traction boot cover consists of an inner fixation sleeve and an outer sleeve. The inner fixation sleeve is made of soft foam and covers the foot and lower leg. The outer sleeve is made of rigid material and covers and tightens the inner fixation sleeve before connecting to the traction device. During surgery, the traction device pulls the user's foot and lower leg by pulling on the outer sleeve. The outer sleeve covers and tightens the inner fixation sleeve, applying pressure to increase the friction between the foot / lower leg and the inner fixation sleeve, as well as the friction between the inner fixation sleeve and the outer sleeve, preventing the user's foot and lower leg from slipping out of the traction boot cover during traction.

[0003] Users vary in body size, and the dimensions of their feet and calves differ. Providing a single, custom-fitted traction sleeve for each user would significantly increase costs. Current technology uses a larger traction sleeve, adjusting the space for the feet and calves to accommodate smaller users. However, the traction sleeve is rigid, and even with adjustments to minimize the space, it's difficult to completely cover the user's feet and calves. This also results in uneven pressure on the feet and calves, with some areas experiencing excessive pressure that could damage them, while others receive insufficient pressure. This reduces friction between the foot / calves and the internal fixation sleeve, as well as between the internal fixation sleeve and the traction sleeve, causing relative movement or even detachment during traction, severely delaying the surgical procedure. Utility Model Content

[0004] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a traction boot cover that can prevent the foot and lower leg from becoming loose.

[0005] To achieve the above objectives, the following technical solution is adopted:

[0006] A traction boot cover includes an inner fixing sleeve and an outer sleeve. The inner fixing sleeve is adapted to form an accommodating space for covering the foot and lower leg under the restraint of the outer sleeve located outside it. The boot cover is characterized by further including straps. The straps include a plurality of restraint assemblies arranged and integrally connected along the extension direction of the inner fixing sleeve. Each restraint assembly includes two corresponding restraint arms and a connecting member disposed on the two restraint arms. The two restraint arms in the same restraint assembly surround the inner fixing sleeve and are fixedly connected by the connecting member to tighten the inner fixing sleeve or disengage from the inner fixing sleeve by the connecting member.

[0007] Furthermore, the first and second sides of the strap are configured to contact the outer surface of the inner fixing sleeve and the inner surface of the outer sleeve, respectively, and to restrict the displacement of the inner fixing sleeve and the outer sleeve through friction.

[0008] Furthermore, the strap has a base layer that is elastic, and the first side and the second side are fixed to the two sides of the base layer.

[0009] Furthermore, the connecting component is Velcro, with one side of the two corresponding binding arms having a rough Velcro surface and the other having a hook Velcro surface.

[0010] Furthermore, the strap has through holes on both sides, and the heel portion of the inner fixing sleeve is adapted to pass through the through holes, so that the inner fixing sleeve contacts the edge of the through holes.

[0011] Furthermore, the base layer is made of TPU material.

[0012] Furthermore, the first and second sides are made of brushed elastic fabric.

[0013] In addition, a traction device is provided, which employs a traction boot cover as described in any of the above claims.

[0014] Compared with existing technologies, the above solution has the following beneficial effects:

[0015] 1. This utility model's traction boot cover includes a strap with a restraint component. The restraint component covers and tightens the inner fixation sleeve, applying pressure to it. While the inner fixation sleeve is subjected to pressure from the restraint component, this pressure is transmitted to the user's foot and lower leg due to force transmission. This increases the pressure exerted by the inner fixation sleeve on the foot and lower leg, thus increasing the friction between the inner fixation sleeve and the foot and lower leg. When the user's foot and lower leg need to move relative to the inner fixation sleeve, the increased friction force prevents the foot and lower leg from loosening or falling out of the inner fixation sleeve during traction. In hip joint surgery, existing technology uses a rigid outer shell to cover a soft inner fixation sleeve. Since the inner fixation sleeve is in direct contact with the body, a soft material is necessary to prevent injury. A rigid outer shell allows the relative position of the foot and lower leg to remain relatively fixed during traction. If a soft outer shell is used, the relative position between the foot and lower leg will change during traction, potentially injuring the user. Existing technologies use relatively large outer shells, but these shells are made of rigid material. Even with a smaller space for the inner fixing sleeve, it's difficult to completely cover and tighten it for smaller users. This means that the pressure applied by the outer shell to the inner fixing sleeve is less, resulting in insufficient friction between the inner fixing sleeve and the foot and lower leg. During traction, the foot and lower leg may move or even fall out of the inner fixing sleeve. The straps of this invention directly cover the outside of the inner fixing sleeve, directly transferring pressure to it and increasing friction between the inner fixing sleeve and the foot and lower leg, preventing relative displacement. Using these straps prevents the foot and lower leg from loosening or falling out of the traction boot cover during traction, eliminating the need to produce various sizes of outer shells to fit different body types. For existing traction boot covers on the market, simply adding straps improves the foot and lower leg restraint function, significantly reducing production and operating costs.

[0016] The present invention comprises several restraint components arranged and connected as a single unit along the extension direction of the inner fixing sleeve. These restraint components restrain different parts of the inner fixing sleeve, applying pressure to these parts and increasing the pressure between the inner fixing sleeve and several points on the foot and lower leg. This increases the friction between these points and the inner fixing sleeve, ensuring that the relative position of each part remains fixed during traction. Simultaneously, the increased friction between the inner fixing sleeve and these points on the foot and lower leg also increases the overall friction between the inner fixing sleeve and the foot and lower leg.

[0017] Users have varying body sizes, and their feet and calves differ in shape and size. The restraint straps must apply appropriate pressure to the inner fixation sleeves of users with different body types. If the restraint assembly is of a fixed size, it cannot accommodate users of different body types. This invention's restraint assembly includes two corresponding restraint arms and a connecting component. The restraint arms wrap around the inner fixation sleeve. By adjusting the size of the wrapping shape of the restraint arms, the pressure of the restraint assembly on the inner fixation sleeve can be adjusted. After adjusting to a suitable pressure, the connecting component fixes the relative positions of the two corresponding restraint arms, allowing the restraint assembly to continuously apply appropriate pressure to the inner fixation sleeve. After traction is completed, the connecting component is released to loosen the restraint assembly's binding on the inner fixation sleeve. This eliminates the need to stock various sizes of restraint straps; a single strap can accommodate users of different body types. For existing traction boot covers on the market, simply adding one strap significantly improves the effectiveness of existing traction boot covers, greatly reducing the cost of upgrading equipment.

[0018] 2. During traction in hip surgery, insufficient pressure from the larger outer sheath leads to insufficient friction between the inner fixation sleeve and the outer sheath covering the user's foot and lower leg. This causes relative displacement between the inner and outer sheaths during traction, and in some cases, the inner fixation sleeve may even detach from the outer sheath. The strap covers the outer part of the inner fixation sleeve, and its first and second sides contact the outer surface of the inner fixation sleeve and the inner surface of the outer boot cover. For relative displacement to occur between the inner and outer sheaths, the strap must overcome not only the friction between the inner and outer sheaths but also the friction between the inner and outer sheaths and the strap. Compared to the outer sheath only contacting the inner fixation sleeve, the strap of this invention restricts relative displacement between the inner and outer sheaths through friction. This solution addresses both the insufficient friction between the inner fixation sleeve and the foot and lower leg, and the insufficient friction between the inner and outer sheaths.

[0019] 3. The traction straps are frequently stretched and contracted during use. The straps have an elastic base layer to prevent damage. Traction boot covers are used during surgery. If the straps tear or break during the procedure, the pressure on the internal fixation sleeve will decrease, reducing friction between the foot / lower leg and the internal fixation sleeve. This makes them more prone to loosening or detachment, posing a significant surgical risk. The elastic base layer increases stability during surgery.

[0020] 4. The connecting parts on the two corresponding restraint arms are Velcro, one with a hook-and-loop side and the other with a loop side. When adjusting the pressure of the restraint assembly on the inner fixation sleeve, the two corresponding restraint arms will frequently be tightened and loosened. The Velcro allows for flexible removal and disassembly, reducing adjustment time and preventing excessive movement of the lower limbs during installation or removal of the straps. The Velcro connection is stable, ensuring that after the restraint arm pressure is adjusted, the pressure remains continuous on the inner fixation sleeve, maintaining stable friction between the inner fixation sleeve and the foot and lower leg. During use, the outer sleeve restrains the inner fixation sleeve and the straps, and also restrains the connecting parts. If the connecting parts are rigid, when the outer sleeve restrains the connecting parts to the outside of the inner fixation sleeve, it can cause a noticeable foreign body sensation or even injury to the foot and lower leg. The Velcro is soft and has low rigidity; when the outer sleeve restrains the Velcro to the outside of the inner fixation sleeve, it will not cause injury to the foot and lower leg.

[0021] 5. The strap has through holes on both sides, which are suitable for the heel portion of the inner fixation sleeve to pass through, with the inner fixation sleeve contacting the edge of the through hole. The through holes of the strap surround and restrain the heel portion of the inner fixation sleeve. When using the traction boot cover, firstly, the inner fixation sleeve covers the foot and lower leg, then the strap restrains the inner fixation sleeve, and finally the outer cover covers both the inner fixation sleeve and the strap. If there are no through holes, when the strap restrains the inner fixation sleeve, wrinkles will form at the heel portion of the inner fixation sleeve. The smaller the user's body size, the larger the wrinkles in this area. These wrinkles will cause the strap to bunch up. When the outer cover covers the inner fixation sleeve and the strap, due to the accumulation of these wrinkles, it will not be able to completely cover the inner fixation sleeve, and the inner fixation sleeve will not be able to be completely positioned in the preset position. During traction, the foot and lower leg may loosen or fall off. To prevent the strap from wrinkling in this area, straps of different sizes should be manufactured to fit users of different body types. The strap of this utility model has through holes on both sides. When in use, the through holes are used to bind the inner fixing sleeve to the heel. The strap will not wrinkle at this part. The outer sleeve can better cover the inner fixing sleeve and the strap, so there is no need to use straps of various sizes to match users of different body types, which greatly reduces the cost of use.

[0022] After the inner fixation sleeve is secured with straps, the position of the inner fixation sleeve will change due to various factors such as compression, friction, and deformation during the process of the outer shell covering the inner fixation sleeve and straps. Since the shapes and sizes of different parts of the human foot and lower leg vary, the pressure exerted by the restraint components on the various restrained parts of the inner fixation sleeve will also change as the restraint components change position. In some cases, the restraint pressure increases after the restraint component changes position, potentially damaging the foot and lower leg; in others, the restraint pressure decreases, resulting in insufficient pressure from the inner fixation sleeve on the foot and lower leg, and insufficient friction between them, causing displacement during traction. For through-hole restraint inner fixation sleeves on the heel, because the human foot has a groove in the arch towards the ball of the foot and a protrusion in the heel away from the toes, the soft inner fixation sleeve can conform to the shape of the human foot. The straps secure the heel of the internal fixation sleeve through through-holes. If the straps are to move along the toes of the internal fixation sleeve, the protrusions on the heel prevent them from moving towards the toes; if the straps are to move along the lower leg, the grooves on the arch of the internal fixation sleeve prevent them from moving towards the lower leg. Therefore, the through-holes effectively restrict the relative position of the straps and the internal fixation sleeve, preventing the foot and lower leg from loosening or falling off the internal fixation sleeve.

[0023] 6. The base layer is made of TPU material. TPU has excellent resilience. The straps are frequently stretched and contracted during use, and this excellent resilience prevents them from easily damaging. The traction boot is used during surgery. If the straps tear or break during the procedure, the pressure on the internal fixation sleeve will decrease, reducing the friction between the foot / lower leg and the internal fixation sleeve. This makes them more prone to loosening or detachment, posing a significant surgical risk. Using TPU material for the straps increases stability during surgery.

[0024] 7. The first and second sides are made of brushed elastic fabric. The brushed elastic fabric undergoes a brushing process, creating a dense nap on the surface, increasing the coefficient of friction and enhancing traction. Located between the inner fixing sleeve and the outer sleeve, the first and second sides increase the friction between them, preventing movement. The brushed elastic fabric also features softness, comfort, and high resilience. When using the traction boot cover, the outer sleeve restrains the inner fixing sleeve and straps. Since the inner fixing sleeve is made of a soft material, if the first and second sides were made of a harder material, the stiffness would cause discomfort to the foot and calf, and could even damage them. The first and second sides will frequently stretch and contract with the base layer; the brushed elastic fabric's high resilience prevents damage during these cycles.

[0025] 8. The traction device made using the above technical solutions can prevent displacement of the feet and lower legs during lower limb traction. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments, the accompanying drawings used are briefly described below:

[0027] Figure 1 This is a schematic diagram of a traction boot cover as an example.

[0028] Figure 2 This is a schematic diagram of the internal fixing sleeve;

[0029] Figure 3 This is a schematic diagram of the strap structure;

[0030] Figure 4 This is a side view of the internal fixation sleeve and straps;

[0031] Figure 5 A front view of the internal fixation sleeve and straps;

[0032] Figure 6 This is a schematic diagram of the back of the internal fixation sleeve and straps;

[0033] Figure 7 This is a cross-sectional view of the strap.

[0034] Explanation of key figure labels:

[0035] 1. Strap; 2. Inner fixing sleeve; 3. Outer sleeve; 111. Restraint assembly; 12. Restraint arm; 100. Through hole; 101. First side; 102. Second side; 103. Base layer. Detailed Implementation

[0036] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0037] Unless otherwise specified, in the claims and description, the terms “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “clockwise,” “counterclockwise,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0038] Unless otherwise specified in the claims and description, the terms "fixed connection" or "fixed connection" shall be interpreted broadly to mean any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection, and fixed connection by other means or components.

[0039] Unless otherwise specified, the terms “comprising,” “having,” and variations thereof in the claims and description shall mean “including but not limited to.”

[0040] In the claims and description, unless otherwise specified, the term "have" means that a technical feature that follows is part of a technical feature that precedes it.

[0041] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings.

[0042] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of a traction shoe cover is shown. The traction shoe cover includes an inner fixing sleeve 2 and an outer sleeve 3. Figure 2 A schematic diagram of the internal fixation sleeve 2 is shown. The internal fixation sleeve 2, constrained by an outer shell sleeve 3, forms a space for covering the foot and lower leg. The internal fixation sleeve 2 is made of soft foam, used to cover and protect the foot and lower leg. The outer shell sleeve 3 is a rigid shell, preventing relative movement between the foot and lower leg. The outer shell sleeve 3 is located outside the internal fixation sleeve 2, constraining it to cover and restrain the foot and lower leg. During surgery, traction on the outer shell sleeve 3 moves the user's foot and lower leg to the desired position. Figure 3 , Figure 4As shown, this utility model includes a strap 1, which comprises several binding components 111 arranged and connected together along the extension direction of the inner fixing sleeve 2. The binding components 111 are arranged along the extension direction of the inner fixing sleeve 2, binding different parts of the inner fixing sleeve 2. The binding components 111 cover the outside of the inner fixing sleeve 2 and tighten it, applying pressure to the inner fixing sleeve 2. Due to the transmission of force, the pressure of the inner fixing sleeve 2 on the foot and lower leg increases. By increasing the pressure between the inner fixing sleeve 2 and the foot and lower leg, the friction between them is increased. The greater the friction between them, the greater the friction force that needs to be overcome for relative displacement to occur, making relative displacement less likely. The binding components 111 apply pressure to multiple parts of the inner fixing sleeve 2, increasing the friction between multiple parts of the inner fixing sleeve 2 and the foot and lower leg, making it difficult for any part of the foot and lower leg to move with the inner fixing sleeve 2. In this embodiment, the strap 1 is provided with three binding components 111, which respectively bind the forefoot, ankle and calf of the inner fixing sleeve 2, thereby increasing the friction between the inner fixing sleeve and the user's forefoot, ankle and calf.

[0043] The restraint assembly 111 includes two corresponding restraint arms 12 and connecting parts disposed on the two restraint arms 12. The two restraint arms 12 in the same restraint assembly 111 surround the inner fixing sleeve 2 and are fixed together by the connecting parts to tighten the inner fixing sleeve 2 or to loosen the inner fixing sleeve 2 by disengaging from the inner fixing sleeve 2. The restraint assembly 111 includes two corresponding restraint arms 12, which surround the inner fixing sleeve 2. The pressure of the restraint assembly 111 on the inner fixing sleeve 2 can be adjusted by adjusting the size of the surrounding shape of the restraint arms 12. The same strap 1 can adjust the pressure of the restraint assembly 111 on the inner fixing sleeve 2 by adjusting the size of the surrounding shape of the restraint arms 12, so as to apply sufficient pressure to the feet and calves of different body types and prevent the feet and calves from falling off the inner fixing sleeve 2. The two corresponding restraint arms 12 are provided with connecting parts. The pressure of the corresponding restraint arm 12 surrounding the inner fixing sleeve 2 is adjusted. After the pressure is adjusted, the corresponding restraint arm 12 is fixed by the connecting parts so that the adjusted pressure can be continuously applied to the inner fixing sleeve 2. After use, by disengaging the connecting parts, the restraint arm 12 is no longer restraining the inner fixing sleeve 2, and the strap 1 and the inner fixing sleeve 2 can be easily removed.

[0044] See Figure 7As shown, the strap 1 includes a first side 101 and a second side 102. These two sides are configured to contact the outer surface of the inner fixation sleeve 2 and the inner surface of the outer boot sleeve, respectively, and to restrict the displacement of the inner fixation sleeve and the outer shell sleeve through friction. The first side 101 and the second side 102 are used to increase the friction of the strap 1 surface. The first side 101 and the second side 102 are located on two sides of the strap 1. The strap 1 is located outside the inner fixation sleeve 2 and tightens the inner fixation sleeve 2. The outer shell sleeve 3 covers the inner fixation sleeve 2 and the strap 1. The first side 101 and the second side 102 contact the outer surface of the inner fixation sleeve 2 and the inner surface of the outer shell sleeve 3, respectively, increasing the friction between the contact surfaces. The strap 1 increases the friction between the strap 1 and the inner fixation sleeve 2 by tightening the inner fixation sleeve 2 to increase pressure, and also increases the friction between the strap 1 and the inner fixation sleeve 2 through the first side 101. When the outer shell 3 covers the inner fixing sleeve 2, it contacts both the outer surface of the inner fixing sleeve 2 and the first side 101 of the strap 1. Compared with the prior art, which only contacts the outer surface of the inner fixing sleeve 2, in this embodiment, the friction force that needs to be overcome when the inner fixing sleeve 2 and the outer shell 3 need to undergo relative displacement is increased. The greater the friction force, the less likely it is for the two to undergo relative displacement.

[0045] In a preferred embodiment, the strap 1 has a base layer 103, which is elastic. The first side 101 and the second side 102 are fixed to the two sides of the base layer 103. The strap 1 is frequently stretched and contracted during use. The elastic base layer 103 makes the strap 1 elastic, which is convenient for stretching and contracting during use.

[0046] In a preferred embodiment, the connecting component is Velcro. One side of the two corresponding restraint arms 12 that are in contact with each other has a loose Velcro surface, and the other has a hook-and-loop Velcro surface. During traction, after adjusting the distance between the two restraint arms 12, their relative positions are fixed by the Velcro. After traction is completed, the Velcro between the two restraint arms 12 disengages, allowing the strap to loosen from the inner fixing sleeve 2.

[0047] In a preferred embodiment, the strap 1 has through holes 100 extending through both sides. The heel portion of the inner fixing sleeve 2 is adapted to pass through the through holes 100, and the inner fixing sleeve 2 contacts the edge of the through holes 100. The through holes 100 surround and tighten the heel portion of the inner fixing sleeve 2. The through holes 100 allow the strap 1 to pass through the heel portion of the inner fixing sleeve 2 without creating wrinkles. The strap 1 can better cover the inner fixing sleeve 2, and the outer sleeve 3 can also better cover the inner fixing sleeve 2. Furthermore, the through holes 100 restrain the heel portion of the inner fixing sleeve 2, preventing relative displacement between the strap 1 and the inner fixing sleeve 2 during wear.

[0048] In a preferred embodiment, the base layer 103 is made of TPU. TPU has excellent resilience. The strap 1 will be frequently stretched and contracted during use, and its excellent resilience can prevent the strap 1 from being damaged, extend its service life, and improve its stability.

[0049] In a preferred embodiment, the first side 101 and the second side 102 are made of brushed elastic fabric. The brushed elastic fabric increases the friction of the strap surface. It also features softness and high resilience, thus enhancing the user experience and durability.

[0050] In addition, this utility model also provides a traction device, which includes the aforementioned traction boot cover.

[0051] This utility model provides a traction boot cover, including an inner fixing sleeve 2 and an outer sleeve 3. The inner fixing sleeve 2 covers the foot and lower leg, and the outer sleeve 3 is located outside the inner fixing sleeve 2. The outer sleeve 3 binds the inner fixing sleeve 2, thus binding the foot and lower leg. In use, the foot and lower leg are pulled by pulling the outer sleeve 3. To prevent relative displacement between the foot and lower leg and the outer sleeve 3, the friction between each contact surface is increased, that is, the friction between the inner fixing sleeve 2 and the foot and lower leg, and the friction between the outer sleeve 3 and the inner fixing sleeve 2 are increased. The traction boot cover includes a strap 1, which has a plurality of binding components 111 arranged along the extension direction of the inner fixing sleeve 2 and connected as one unit. The plurality of binding components 111 are used to tighten the inner fixing sleeve 2, apply pressure to the inner fixing sleeve 2, increase the pressure between the inner fixing sleeve 2 and the user's foot and lower leg, and increase the friction between the contact surfaces of the two. Each binding component 111 includes two corresponding binding arms 12 and connecting parts provided on the two binding arms 12. Two restraint arms 12 of the same restraint assembly 111 surround the inner fixing sleeve 2. The pressure of the restraint assembly 111 on the inner fixing sleeve 2 is adjusted by adjusting the restraint arms 12. After the pressure is adjusted, the relative position of the two restraint arms 12 is fixed by Velcro. The strap 1 includes a first side 101, a second side 102, and a base layer 103. The first side 101 and the second side 102 are located on two sides of the base layer 103. The first side 101 and the second side 102 restrict the relative displacement between the inner fixing sleeve 2 and the outer sleeve 3 through friction. When the inner fixing sleeve 2 and the outer sleeve 3 need to move relative to each other, they must overcome not only the friction between themselves but also the friction between the inner fixing sleeve 2 and the first side 101 and the second side 102.

[0052] The description of the above specification and embodiments is used to explain the protection scope of this utility model, but does not constitute a limitation on the protection scope of this utility model.

Claims

1. A traction boot cover comprising an inner fixing sleeve (2) and an outer sleeve (3), said inner fixing sleeve (2) being adapted to form an accommodating space for covering the foot and lower leg under the restraint of said outer sleeve (3) located outside it, characterized in that, It also includes straps (1); The strap (1) includes several binding components (111) arranged along the extension direction of the inner fixing sleeve (2) and connected together. Each binding component (111) includes two binding arms (12) in corresponding positions and a connecting member provided on the two binding arms (12). The two binding arms (12) in the same binding component (111) surround the inner fixing sleeve (2) and are fixed by the connecting member to tighten the inner fixing sleeve (2) or to release the inner fixing sleeve (2) by the connecting member.

2. A traction shoe as claimed in claim 1, wherein The first side (101) and the second side (102) of the strap (1) are configured to contact the outer surface of the inner fixing sleeve (2) and the inner surface of the outer sleeve (3) respectively, and restrict the displacement of the inner fixing sleeve (2) and the outer sleeve (3) by friction.

3. A traction shoe as claimed in claim 2, wherein, The strap (1) has a base layer (103) which is elastic, and the first side (101) and the second side (102) are fixed to the two sides of the base layer (103).

4. The traction shoe of claim 3 wherein, The connecting component is Velcro, and the two corresponding binding arms (12) have a rough Velcro surface on one side and a hook Velcro surface on the other side when they are in contact with each other.

5. A traction shoe as claimed in claim 4, wherein, The strap (1) has through holes (100) extending through both sides. The heel portion of the inner fixing sleeve (2) is adapted to be inserted into the through holes (100) and to make the inner fixing sleeve (2) contact the edge of the through holes (100).

6. The traction shoe of claim 3 wherein, The base layer (103) is made of TPU material.

7. The traction shoe of claim 2 wherein, The first side (101) and the second side (102) are made of brushed elastic fabric.

8. A traction device characterized by, It adopts a traction boot cover as described in any one of claims 1 to 7.

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