Roller device and shoe

Abstract

The utility model provides a pulley device and a shoe, the pulley device comprises a shell and a pulley assembly, and the shell forms an accommodating space with an opening; the pulley assembly is arranged in the containing space and comprises a pulley support and a pulley, the pulley is rotatably arranged on the pulley support, the pulley support is rotatably connected with the shell through a rotating shaft of the pulley support, a baffle is further arranged on the pulley support, and when the pulley support rotates, the baffle and the pulley can enter and exit from the containing space through the opening; wherein the pulley assembly has a storage state and a use state, the pulley assembly rotates around a rotating shaft of the pulley support to achieve switching between the storage state and the use state, when the pulley assembly is in the storage state, the baffle closes the opening, and the pulley is located in the containing space; when the pulley assembly is in a use state, at least part of the rim of the pulley is located outside the shell, and the baffle at least partially seals the opening. The pulley device and the shoe are convenient to operate and higher in safety.

Description

Technical Field

[0001] The present application relates to the technical field of roller skates, and in particular to a pulley device and a shoe. Background Art

[0002] Currently, when switching to roller skating mode, the roller skates on the market require opening the cover of the sole first and then installing the wheels; or opening the cover first and then pressing a button to pop out the wheels. When the shoes are used for daily use, the wheels need to be stored and the cover must be closed.

[0003] However, switching this type of roller skates to roller skating mode requires multiple steps, which is a cumbersome process. The lid must be opened first, and then the pulleys must be opened and installed, making it inconvenient to use. When the shoes are used for daily use, there are large pits and gaps in the pulley mounting area, which are extremely easy to harbor dirt and grime, making it difficult to clean the shoes later. When the shoes are used for roller skating, the pulleys are also not sealed, and small stones and the like can easily enter the gaps between the pulleys, affecting safety during roller skating. Utility Model Content

[0004] To at least partially solve the above-mentioned problems, according to one aspect of the present application, an embodiment of the present application provides a pulley device, the pulley device includes a shell and a pulley assembly, the shell forms a accommodating space with an opening; the pulley assembly is arranged in the accommodating space, the pulley assembly includes a pulley bracket and a pulley, the pulley is rotatably arranged on the pulley bracket, the pulley bracket is rotatably connected to the shell through its rotating shaft, and a baffle is also provided on the pulley bracket, the shape and size of the baffle correspond to the opening, when the pulley bracket rotates, the baffle and the pulley can enter and exit the accommodating space through the opening; wherein, the pulley assembly has a storage state and a use state, the pulley assembly is switched between the storage state and the use state by rotating around the rotating axis of the pulley bracket, when the pulley assembly is in the storage state, the baffle closes the opening, and the pulley is located in the accommodating space; when the pulley assembly is in use, at least part of the rim of the pulley is located outside the shell, and the baffle at least partially closes the opening.

[0005] In some embodiments, along a direction perpendicular to the rotation axis of the pulley bracket, the baffle and the rotation axis of the pulley are respectively located on two sides of the axis of the rotation axis of the pulley bracket.

[0006] In some embodiments, the pulley device further includes a locking mechanism, which is at least partially disposed in the accommodating space, and is used to lock the pulley assembly in a storage state or a use state.

[0007] In some embodiments, the locking mechanism can be slidably arranged in the accommodating space, and the locking mechanism includes a locking portion, which can move to a locked position or an unlocked position as the locking mechanism slides, wherein when the locking portion is in the locked position, the locking portion limits the rotation of the pulley bracket, and when the locking portion is in the unlocked position, the locking portion does not limit the rotation of the pulley bracket.

[0008] In some embodiments, the locking portion performs linear motion as the locking mechanism slides; the pulley bracket includes two parallel and oppositely arranged longitudinal frames, the pulley is arranged between the two longitudinal frames, and the rotation axis of the pulley bracket is vertically connected to the longitudinal frames; the side surfaces of the longitudinal frames protrude in a direction away from the longitudinal frames to form a first limiting groove and a second limiting groove, the first limiting groove and the second limiting groove are distributed along the circumference of the rotation axis of the pulley bracket, the notches of the first limiting groove and the second limiting groove are at an equal distance from the rotation axis of the pulley bracket, and the first limiting groove and The notch of the second limiting groove faces the rotation axis of the pulley bracket, and the locking part can enter the first limiting groove and the second limiting groove respectively through the notches of the first limiting groove and the second limiting groove; the distance between the locking position and the rotation axis of the pulley bracket is greater than the distance between the notches of the first limiting groove and the second limiting groove and the rotation axis of the pulley bracket, and is smaller than the distance between the bottom of the first limiting groove and the second limiting groove and the rotation axis of the pulley bracket; the distance between the unlocking position and the rotation axis of the pulley bracket is smaller than the distance between the notches of the first limiting groove and the second limiting groove and the rotation axis of the pulley bracket.

[0009] In some embodiments, when the pulley assembly is in use, the locking portion enters the first limiting groove to lock the pulley assembly; along the rotation direction of the pulley assembly, the length of the groove wall on the side of the first limiting groove away from the second limiting groove is greater than the length of the groove wall on the side of the first limiting groove close to the second limiting groove.

[0010] In some embodiments, the pulley bracket also includes a transverse frame, two longitudinal frames are vertically arranged on the transverse frame, and the baffle is detachably arranged on the transverse frame; the pulley bracket also includes a first elastic member, the first elastic member is sleeved on the rotating shaft of the pulley bracket, one end of the first elastic member is in contact with the shell, and the first elastic member is used to provide elastic force for the rotation of the pulley bracket.

[0011] In some embodiments, the first elastic member is a torsion spring.

[0012] In some embodiments, the locking mechanism includes a frame, an extension, an operating part and a second elastic member; one end of the extension is connected to the frame, and the other end of the extension is provided with a locking part, the locking part extends on the extension toward the direction of the pulley bracket, and the locking part is cylindrical; the operating part is connected to the frame, and the operating part is at least partially located outside the shell; one end of the second elastic member abuts the frame, and the other end of the second elastic member abuts the shell, and the second elastic member provides elastic force for the locking part to move from the unlocked position to the locked position.

[0013] In some embodiments, the second elastic member is a compression spring or a tension spring.

[0014] In some embodiments, the shell includes an upper shell and a lower shell; an opening is formed at the bottom of the lower shell, and two platforms of the same height are also formed on the inner side of the bottom of the lower shell for supporting the frame, the frame can slide on the platform, and the two platforms are distributed on opposite sides of the opening; a rectangular storage bin is formed on the side of the upper shell facing the lower shell, and the pulley assembly can be stored in the storage bin. The frame is rectangular, and the frame is mounted on the bin wall of the storage bin. The length of the bin wall is less than the length of the frame, and the width of the bin wall is equal to the width of the frame. The edge of the bin wall presses the rotating axis of the pulley bracket onto the lower shell; a pressing part is also provided on the side of the upper shell corresponding to the operating part, and the pressing part is rotatably connected to the upper shell, and the pressing part abuts against the operating part.

[0015] In some embodiments, the upper shell, the lower shell, and the pulley bracket are hollow structures, and the storage bin and the baffle are non-hollow structures.

[0016] According to another aspect of the present application, an embodiment of the present application further provides a shoe, the sole of the shoe being provided with the pulley device provided by any embodiment of the present application.

[0017] The pulley device and shoes provided in the embodiments of the present application are characterized in that the pulley assembly can be switched between a storage state and a use state by rotating around the rotation axis of the pulley bracket, which is convenient to operate; a baffle is also provided on the pulley bracket, which can close the opening of the pulley device housing when the pulley assembly is in the storage state, thereby preventing foreign matter and dirt from entering the pulley device when the shoes equipped with the pulley device are used in daily life. At the same time, the baffle can also block foreign matter when the pulley assembly is in use, thereby reducing the chance of foreign matter such as pebbles entering the pulley gap and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 is a schematic diagram of a pulley device provided by an embodiment of the present application when the pulley assembly is in a retracted state;

[0020] Figure 2 is a schematic diagram of a pulley device provided by an embodiment of the present application when the pulley assembly is in use;

[0021] Figure 3is an exploded view of the pulley device provided by an embodiment of the present application when the pulley assembly is in a retracted state;

[0022] Figure 4 is an exploded view of a pulley device provided by an embodiment of the present application when the pulley assembly is in use;

[0023] Figure 5 is a schematic diagram of a pulley assembly provided in an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of a pulley bracket provided in an embodiment of the present application;

[0025] Figure 7 is an exploded view from one angle of a pulley assembly provided in an embodiment of the present application;

[0026] Figure 8 is an exploded view of a pulley assembly provided in an embodiment of the present application from another angle;

[0027] Figure 9 is a schematic diagram of a locking mechanism provided in an embodiment of the present application;

[0028] Figure 10 is a schematic diagram of a housing provided in an embodiment of the present application;

[0029] Figure 11 is a schematic diagram of a lower shell provided in an embodiment of the present application;

[0030] Figure 12 This is a schematic diagram of the upper shell provided in an embodiment of the present application.

[0031] The reference numerals are as follows:

[0032] 100, shell; 110, lower shell; 111, opening; 112, platform; 120, upper shell; 121, storage compartment; 122, pressing part; 200, pulley assembly; 210, pulley bracket; 211, rotating axis of pulley bracket; 212, longitudinal frame; 2121, first limiting groove; 2122, second limiting groove; 213, transverse frame; 220, pulley; 230, baffle; 240, first elastic member; 300, locking mechanism; 310, frame; 320, extension part; 330, locking part; 340, operating part; 350, second elastic member.

[0033] It should be understood that the size of each part shown in the drawings is not drawn according to the actual proportional relationship.In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions of the preferred embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection claimed in this application.

[0035] The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "include" or "comprises" mean that the elements preceding the term encompass the elements listed after the term, and do not exclude the possibility of also encompassing other elements. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0036] See also Figures 1-4 According to one aspect of the present application, an embodiment of the present application provides a pulley device, which includes a housing 100 and a pulley assembly 200. The housing 100 forms a receiving space with an opening 111, and the opening 111 can be passed through when the pulley assembly 200 is flipped to achieve switching between a storage state and a use state. Exemplarily, the shape of the opening 111 can be rectangular. The pulley assembly 200 is arranged in the receiving space, and the pulley assembly 200 includes a pulley bracket 210 and a pulley 220. The pulley 220 is rotatably arranged on the pulley bracket 210. The pulley bracket 210 is rotatably connected to the housing 100 through its rotating axis to achieve the flipping of the pulley assembly 200. Combined Figure 5 , a baffle 230 is also provided on the pulley bracket 210, and the shape and size of the baffle 230 correspond to the opening 111. For example, the shape of the baffle 230 can also be rectangular. When the pulley bracket 210 rotates, the baffle 230 and the pulley 220 can enter and exit the accommodation space through the opening 111. Among them, the pulley assembly 200 has a storage state and a use state. The pulley assembly 200 switches between the storage state and the use state by rotating around the rotation axis 211 of the pulley bracket, such as Figure 1 and Figure 3 As shown, when the pulley assembly 200 is in the storage state, the baffle 230 closes the opening 111, and the pulley 220 is located in the accommodation space; Figure 2 and Figure 4 As shown, when the pulley assembly 200 is in use, at least part of the rim of the pulley 220 is located outside the housing 100 , so that it can contact a contact surface (such as the ground) to achieve sliding, and the baffle 230 at least partially closes the opening 111 .

[0037] The pulley device and shoes provided in the embodiments of the present application are characterized in that the pulley assembly 200 can be switched between a storage state and a use state by rotating around the rotation axis 211 of the pulley bracket, which is convenient to operate; a baffle 230 is also provided on the pulley bracket 210, and the baffle 230 can close the opening 111 of the pulley device housing 100 when the pulley assembly 200 is in the storage state, thereby preventing foreign matter and dirt from entering the pulley device when the shoe equipped with the pulley device is used in daily life. At the same time, the baffle 230 can also block foreign matter when the pulley assembly 200 is in use, thereby reducing the probability of foreign matter such as pebbles entering the gap of the pulley 220 and improving safety.

[0038] In some embodiments, the baffle 230 and the pulley 220's rotational axis are located on opposite sides of the pulley support's rotational axis 211, perpendicular to the pulley support's rotational axis 211. In this embodiment, this arrangement can help reduce the size and weight of the pulley assembly 200. Furthermore, when the pulley assembly 200 rotates about its rotational axis, the pulley 220 and the baffle 230 move in opposite directions relative to the housing 100, allowing the pulley 220 and the baffle 230 to alternately enter and exit the housing 100.

[0039] See also Figure 3 、 Figure 4 as well as Figure 9 In some embodiments, the pulley assembly further includes a locking mechanism 300, which is at least partially disposed within the accommodation space. The locking mechanism 300 is configured to lock the pulley assembly 200 in the stored state or the use state. In this embodiment, the pulley assembly 200 is locked by the locking mechanism 300, thereby more reliably maintaining the stored state or the use state. Of course, in other embodiments, the pulley assembly may not include a locking structure, but may rely on friction or a one-way mechanical limiter to maintain the stored state or the use state.

[0040] In some embodiments, the locking mechanism 300 is slidably disposed within the accommodation space. The locking mechanism 300 includes a locking portion 330 that can move to a locked position or an unlocked position as the locking mechanism 300 slides. When the locking portion 330 is in the locked position, the locking portion 330 limits the rotation of the pulley bracket 210. When the locking portion 330 is in the unlocked position, the locking portion 330 does not limit the rotation of the pulley bracket 210. In this embodiment, the locking mechanism 300 drives the locking portion 330 to move by sliding as a whole, resulting in a simple transmission method. Furthermore, the locking portion 330 can be fixed to the locking mechanism 300, making the structure more reliable.

[0041] In some embodiments, the locking portion 330 moves linearly as the locking mechanism 300 slides; Figure 6The pulley bracket 210 includes two parallel and oppositely arranged longitudinal frames 212, the pulley 220 is arranged between the two longitudinal frames 212, and the rotating shaft 211 of the pulley bracket is vertically connected to the longitudinal frames 212; the side surfaces of the longitudinal frames 212 protrude in the direction away from the longitudinal frames 212 to form a first limiting groove 2121 and a second limiting groove 2122, the first limiting groove 2121 and the second limiting groove 2122 are distributed along the circumference of the rotating shaft 211 of the pulley bracket, and the notches of the first limiting groove 2121 and the second limiting groove 2122 face the rotating shaft 211 of the pulley bracket. The locking portion 330 can enter the first limiting groove 2121 and the second limiting groove 2122 through the notches of the first limiting groove 2121 and the second limiting groove 2122, respectively. The distance between the locked position and the rotation axis 211 of the pulley bracket is greater than the distance between the notches of the first limiting groove 2121 and the second limiting groove 2122 and the rotation axis 211 of the pulley bracket, and is less than the distance between the bottoms of the first limiting groove 2121 and the second limiting groove 2122 and the rotation axis 211 of the pulley bracket. The distance between the unlocked position and the rotation axis 211 of the pulley bracket is less than the distance between the notches of the first limiting groove 2121 and the second limiting groove 2122 and the rotation axis 211 of the pulley bracket. Preferably, the notches of the first limiting groove 2121 and the second limiting groove 2122 are equal to the distance between the rotation axis 211 of the pulley bracket. For example, the two longitudinal frames 212 can be roughly semicircular in shape, with the arcuate edges of the semicircles extending outward in the same direction as the walls of the first limiting groove 2121. A notch can be provided at the arcuate edge of one of the longitudinal frames 212 to facilitate assembly of the locking mechanism 300. When the locking portion 330 is in the unlocked position, the locking portion 330 does not enter the first limiting groove 2121 or the second limiting groove 2122, and the pulley bracket 210 can rotate. When the locking portion 330 is in the locked position, the locking portion 330 enters the first limiting groove 2121 or the second limiting groove 2122, and the pulley assembly 200 is fixed in the use state or the storage state. In this embodiment, the above-mentioned structure is used to achieve locking of the pulley bracket 210, which has a simple structure, helps to control the volume and weight of the pulley device, and is easy to operate.

[0042] In some embodiments, when the pulley assembly 200 is in use, the locking portion 330 enters the first limiting groove 2121 to lock the pulley assembly 200; along the rotation direction of the pulley assembly 200, the length of the groove wall on the side of the first limiting groove 2121 away from the second limiting groove 2122 is greater than the length of the groove wall on the side of the first limiting groove 2121 close to the second limiting groove 2122. It can be understood that when the pulley assembly 200 is fixed in the use state, the pulley 220 may bear a greater load. Therefore, in this embodiment, by setting a longer groove wall on the side bearing the load, a more stable locking of the pulley assembly 200 can be achieved, preventing the locking portion 330 from disengaging from the first limiting groove 2121. Along the rotation direction of the pulley assembly 200, it may be along the extension direction of the shorter arc passed by the first limiting groove 2121 to the second limiting groove 2, and at this time, the angles formed by the first limiting groove 2121 and the second limiting groove 2122 with the rotation axis 211 of the pulley bracket are less than 180°.

[0043] Please refer to Figure 6 , Figure 7 , Figure 8 , in some embodiments, the pulley bracket 210 further includes a transverse frame body 213, and two longitudinal frame bodies 212 are vertically arranged on the transverse frame body 213. In this embodiment, the two longitudinal frame bodies 212 and the transverse frame body 213 can form a "U" shape, and the baffle 230 is detachably arranged on the transverse frame body 213, so as to facilitate the replacement of the baffle 230. Exemplarily, a plurality of round holes can be opened on the transverse frame body 213, and a plurality of cylinders matching the round holes can be arranged on the baffle 230 to achieve the detachable connection between the baffle 230 and the transverse frame body 213. The pulley bracket 210 further includes a first elastic member 240, and the first elastic member is sleeved on the rotation axis 211 of the pulley bracket. One end of the first elastic member 240 abuts against the housing 100, and the other end of the first elastic member 240 can be connected to the pulley bracket 210. For example, a groove can be opened on the rotation axis 211 of the pulley bracket to achieve the snap connection with the first elastic member 240. The first elastic member 240 is used to provide elastic force for the rotation of the pulley bracket 210. Exemplarily, the first elastic member 240 can be a torsion spring. By setting the first elastic member 240, the automatic ejection or automatic retraction of the pulley assembly 200 can be achieved, which is more convenient for operation.

[0044] Such as Figure 9As shown, in some embodiments, the locking mechanism 300 includes a frame 310, an extension portion 320, an operating portion 340 and a second elastic member 350; one end of the extension portion 320 is connected to the frame 310, and the other end of the extension portion 320 is provided with a locking portion 330, and the locking portion 330 extends on the extension portion 320 in the direction of the pulley bracket 210. Preferably, the locking portion 330 can be cylindrical, and the first limiting groove 2121 and the second limiting groove 2122 can be U-shaped grooves; the operating portion 340 is connected to the frame 310, and the operating portion 340 is at least partially located outside the shell 100, so as to prevent the locking portion 330 from being swung out of engagement with the frame 310. It is convenient to operate the locking mechanism 300 through the operating part 340. For example, the locking mechanism 300 can be pressed through the operating part 340 to achieve the sliding of the locking mechanism 300; one end of the second elastic member 350 abuts against the frame 310, and the other end of the second elastic member 350 abuts against the shell 100. The second elastic member 350 provides elastic force for the locking part 330 to move from the unlocked position to the locked position. For example, the second elastic member 350 can be a compression spring or a tension spring. The second elastic member 350 can keep the locking part 330 in the locked position to increase the reliability of the locking mechanism 300.

[0045] See also Figure 10 、 Figure 11 、 Figure 12In some embodiments, the shell 100 includes an upper shell 120 and a lower shell 110. The upper shell 120 and the lower shell 110 are the facades of the pulley device, which wrap the entire device into a whole and are easy to install in the shoes. The upper shell 120 and the lower shell 110 can be fixed by bolts; an opening 111 is formed at the bottom of the lower shell 110, and two platforms 112 of the same height for supporting the frame 310 are also formed on the inner side of the bottom of the lower shell 110. The frame 310 can slide on the platform 112. The two platforms 112 are distributed on opposite sides of the opening 111 to support the two sides of the locking mechanism 300 respectively; a rectangular storage bin 121 is formed on the side of the upper shell 120 facing the lower shell 110, and the pulley assembly 200 can be stored in the storage bin 121. The frame 310 is rectangular and is sleeved on the wall of the storage bin 121. The length of the bin wall is less than the length of the frame 310, and the width of the bin wall is less than the length of the frame 310. The cam 310 is provided with a plurality of locking portions 312 and 313, and the locking portion 312 is provided with a plurality of locking portions 314. The locking portion 310 is provided with a plurality of locking portions 315 and 316, and the plurality of locking portions 316 are provided with plurality of locking portions 317. The upper shell 120, lower shell 110, and pulley bracket 210 are hollow structures to reduce the weight of the pulley device and prevent the shoes from being too heavy when used. The storage compartment 121 and baffle 230 are non-hollow structures to prevent foreign matter from entering the pulley assembly 200.

[0046] According to another aspect of the present application, an embodiment of the present application further provides a shoe, wherein the sole of the shoe is provided with a pulley device provided by any embodiment of the present application. For example, the shoe in this embodiment can be a roller skate, and further, can be a dual-purpose shoe that has both roller skating and daily use functions.

[0047] The embodiments of the present application also provide shoes that can easily open and store the pulley 220. When the shoes are in daily use mode, the first elastic member 240 of the pulley assembly 200 can be in a power storage state, and the locking mechanism 300 locks the pulley assembly 200 in the storage state through the locking portion 330, so that the pulley assembly 200 will not flip downward and open. At this time, the baffle 230 of the pulley assembly 200 faces downward, shielding the bottom of the shoe, ensuring the integrity of the sole and preventing foreign objects such as stones from entering and causing safety problems. When it is necessary to enter roller skating mode, the pressing portion 122 is pressed, and the locking mechanism 300 and the pulley assembly 200 are disengaged. Under the action of the first elastic member 240, the pulley assembly 200 flips downward as a whole, and the pulley 220 opens, and skating can be carried out. After the pulley 220 is opened, the locking mechanism 300 locks the pulley assembly 200 in the in-use state. This prevents the pulley 220 from slipping due to friction between the pulley 220 and the bottom surface during skating, making skating safer. A second elastic member 350 is provided at the rear end of the locking mechanism 300. When the pressing portion 122 is pressed, the second elastic member 350 accumulates force. When the pressing portion 122 is released, the second elastic member 350 pops out, causing the pressing portion 122 to return to its original position, facilitating the next opening operation. To deactivate the roller skating mode, a finger can be placed on the side of the baffle 230 away from the pressing portion 122 and flipped toward the pressing portion 122. This finger causes the entire pulley assembly 200 to flip, causing the first elastic member 240 within the pulley assembly 200 to accumulate force again. Once the first elastic member 240 reaches a certain position, the locking mechanism 300 locks the pulley assembly 200 in the retracted state. The pulley 220 is now retracted, returning to normal mode.

[0048] The embodiments of the present application also provide shoes that can be quickly switched between daily mode and roller skating mode without the need for complicated operations. In addition, in daily mode, the integrity of the sole is very good and the safety is higher.

[0049] Based on the above-mentioned embodiments of the present application, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0050] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present application. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A pulley device, characterized in that: include: a housing, wherein the housing forms a receiving space having an opening; A pulley assembly is arranged in the accommodating space, and the pulley assembly includes a pulley bracket and a pulley. The pulley is rotatably arranged on the pulley bracket, and the pulley bracket is rotatably connected to the housing through its rotating shaft. A baffle is also provided on the pulley bracket, and the shape and size of the baffle correspond to the opening. When the pulley bracket rotates, the baffle and the pulley can enter and exit the accommodating space through the opening; wherein, The pulley assembly has a storage state and a use state. The pulley assembly switches between the storage state and the use state by rotating around the rotation axis of the pulley bracket. When the pulley assembly is in the storage state, the baffle closes the opening and the pulley is located in the accommodating space; when the pulley assembly is in the use state, at least part of the rim of the pulley is located outside the shell, and the baffle at least partially closes the opening.

2. The pulley device according to claim 1, characterized in that Along a direction perpendicular to the rotation axis of the pulley bracket, the baffle and the rotation axis of the pulley are respectively located on two sides of the axis of the rotation axis of the pulley bracket.

3. The pulley device according to claim 1, characterized in that Also includes: A locking mechanism is at least partially disposed in the accommodating space, and is used to lock the pulley assembly in the stored state or the use state.

4. The pulley device according to claim 3, characterized in that The locking mechanism is slidably arranged in the accommodating space, and the locking mechanism includes a locking portion, which can move to a locked position or an unlocked position as the locking mechanism slides, wherein when the locking portion is in the locked position, the locking portion limits the rotation of the pulley bracket, and when the locking portion is in the unlocked position, the locking portion does not limit the rotation of the pulley bracket.

5. The pulley device according to claim 4, characterized in that The locking portion moves linearly as the locking mechanism slides; The pulley bracket includes two parallel and oppositely arranged longitudinal frames, the pulley is arranged between the two longitudinal frames, and the rotating shaft of the pulley bracket is vertically connected to the longitudinal frames; The side surface of the longitudinal frame body protrudes in a direction away from the longitudinal frame body to form a first limiting groove and a second limiting groove, the first limiting groove and the second limiting groove are distributed along the circumference of the rotation axis of the pulley bracket, the notches of the first limiting groove and the second limiting groove are equidistant from the rotation axis of the pulley bracket, and the notches of the first limiting groove and the second limiting groove face the rotation axis of the pulley bracket, and the locking portion can enter the first limiting groove and the second limiting groove respectively through the notches of the first limiting groove and the second limiting groove; The distance between the locking position and the rotation axis of the pulley bracket is greater than the distance between the notches of the first limiting groove and the second limiting groove and the rotation axis of the pulley bracket, and is less than the distance between the bottoms of the first limiting groove and the second limiting groove and the rotation axis of the pulley bracket; The distance between the unlocking position and the rotation axis of the pulley bracket is smaller than the distance between the notches of the first limiting groove and the second limiting groove and the rotation axis of the pulley bracket.

6. The pulley device according to claim 5, characterized in that When the pulley assembly is in the use state, the locking portion enters the first limiting groove to lock the pulley assembly; Along the rotation direction of the pulley assembly, the length of a groove wall of the first limiting groove away from the second limiting groove is greater than the length of a groove wall of the first limiting groove close to the second limiting groove.

7. The pulley device according to claim 5, characterized in that The pulley bracket further comprises a transverse frame, the two longitudinal frames are vertically arranged on the transverse frame, and the baffle is detachably arranged on the transverse frame; The pulley bracket further includes a first elastic member, which is sleeved on the rotating shaft of the pulley bracket. One end of the first elastic member abuts against the housing, and the first elastic member is used to provide elastic force for the rotation of the pulley bracket.

8. The pulley device according to claim 7, characterized in that The first elastic member is a torsion spring.

9. The pulley device according to claim 4, characterized in that The locking mechanism includes a frame, an extension portion, an operating portion and a second elastic member; One end of the extension portion is connected to the frame, and the other end of the extension portion is provided with the locking portion, the locking portion extending from the extension portion toward the direction of the pulley bracket, and the locking portion is cylindrical; The operating portion is connected to the frame, and at least a portion of the operating portion is located outside the housing; One end of the second elastic member abuts against the frame, and the other end of the second elastic member abuts against the shell. The second elastic member provides elastic force for the locking portion to move from the unlocking position to the locking position.

10. The pulley device according to claim 9, characterized in that The second elastic member is a compression spring or a tension spring.

11. The pulley device according to claim 9, wherein: The housing comprises an upper shell and a lower shell; The bottom of the lower shell is formed with the opening, and the inner side of the bottom of the lower shell is further formed with two platforms of the same height for supporting the frame, the frame can slide on the platforms, and the two platforms are distributed on opposite sides of the opening; A rectangular storage bin is formed on one side of the upper shell facing the lower shell, and the pulley assembly can be stored in the storage bin. The frame is rectangular and is sleeved on the bin wall of the storage bin. The length of the bin wall is less than the length of the frame, and the width of the bin wall is equal to the width of the frame. The edge of the bin wall presses the rotating shaft of the pulley bracket onto the lower shell. A pressing portion is further provided on a side of the upper shell corresponding to the operating portion. The pressing portion is rotatably connected to the upper shell and abuts against the operating portion.

12. The pulley device according to claim 11, characterized in that The upper shell, the lower shell, and the pulley bracket are hollow structures, and the storage bin and the baffle are non-hollow structures.

13. A shoe, characterized in that: The sole of the shoe is provided with a pulley device according to any one of claims 1-12.

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