Roller device, front-back linkage roller device and roller shoe sole

Abstract

The utility model discloses a pulley device, a front-back linkage pulley device and a sole of a roller shoe, and belongs to the technical field of shoes. The pulley device comprises a rear wheel seat, a pulley assembly and a telescopic part, and the pulley assembly comprises a first pulley shaft and pulleys rotationally arranged at the two ends of the first pulley shaft respectively; the front end of the telescopic component comprises an elastic piece and a rear sliding block, the front end of the elastic piece is connected with the first sliding cavity, and the rear end of the elastic piece is connected with the rear sliding block; wherein the telescopic component is configured to move forwards under the action of thrust so as to apply thrust to the rear sliding block, so that the elastic piece is compressed, and the telescopic component locks the pulley at the extending position or the retracting position by means of the restoring force of the elastic piece. Compared with an existing pulley device, the key is easy to press and high in safety.

Description

Technical Field

[0001] This utility model belongs to the field of footwear technology, and specifically relates to a pulley device, a front and rear linkage pulley device, and a heel sole for roller shoes. Background Technology

[0002] Heeled shoes, as an innovative footwear product that combines the basic functions of athletic shoes with the characteristics of roller skating, feature a retractable roller structure integrated into the heel of the sole. This allows the wearer to quickly switch between walking and skating modes by adjusting their center of gravity, offering advantages in entertainment, exercise, and portability. Currently, existing Heeled shoes are mainly divided into several categories based on roller configuration and retrieval mechanism, including semi-automatic dual-wheel type, manual four-wheel type, semi-automatic small four-wheel type, and foldable large four-wheel type. However, the aforementioned types of Heeled shoes still have the following shortcomings.

[0003] Semi-automatic small four-wheeled model: The front wheels need to be manually removed and installed, while the rear wheels are retracted and extended via buttons. The disadvantages are that the front wheels are inconvenient to remove and install, and the buttons on the rear wheels are too tight or the operation is cumbersome, making it difficult for children to operate independently and requiring adult assistance.

[0004] Manual four-wheel type: Both front and rear wheels need to be manually removed and installed. The main problems are cumbersome operation and the possibility of children losing the wheel parts.

[0005] Semi-automatic four-wheel type: the front wheels are manually detached and retracted, and the rear wheels are retracted and extended by buttons. However, it also suffers from the problem of buttons being too stiff and difficult to operate.

[0006] Foldable four-wheel type: Although the folding design solves the problem of inconvenience in storing and folding, the shoes weigh nearly 5 kilograms, seriously affecting comfort. In addition, the excessively high ground clearance when unfolded can easily lead to instability, posing a significant safety hazard to teenagers.

[0007] Therefore, it is necessary to develop a pulley device, a front and rear linkage pulley device, and a heel shoe sole to address the above problems. Utility Model Content

[0008] In view of this, the present invention provides a pulley device and a front-to-back linkage pulley device to solve the problems of inconvenient operation, inconvenient storage, easy loss, and lack of safety of current roller shoes pulleys. The purpose of this invention is to provide a pulley device, a front-to-back linkage pulley device, and a roller shoe to solve the existing technical problems.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] In a first aspect, this utility model provides a pulley device, including a rear wheel seat, a first pulley assembly, and a telescopic component. The rear wheel seat is used to accommodate the first pulley assembly and the telescopic component. The first pulley assembly includes a first pulley axle and first pulleys respectively disposed at both ends of the first pulley axle. The rear wheel seat has a first sliding cavity in the middle, and first pulley grooves arranged side by side on both sides of the first sliding cavity. The first pulley grooves and the first sliding cavity share a side wall. The side wall has a first wheel axle groove. The first pulleys can be retracted into the first pulley grooves. The lower end of the first sliding cavity is connected to a first cover plate.

[0011] The telescopic component includes an elastic element and a rear slider at its front end. The front end of the elastic element is connected to the first sliding cavity, and the rear end of the elastic element is connected to the rear slider. The rear slider is provided with a first inclined groove and a first arc-shaped groove that extend through the left and right directions and open downwards. The rear end of the first inclined groove is connected to the first arc-shaped groove.

[0012] The telescopic component can move forward under the action of thrust to apply a thrust to the rear slider, compressing the elastic element, and the telescopic component locks the first pulley in the extended or retracted position by means of the restoring force of the elastic element.

[0013] Preferably, the telescopic component further includes a push rod, a rotary cam, a control rod, and a sleeve. The push rod is detachably connected to the rear slider. The rotary cam is sleeved on the push rod. The rotary cam has multiple teeth evenly distributed in the circumferential direction. The control rod has multiple protrusions evenly distributed in the circumferential direction. The front end of the control rod has a serrated locking groove that connects with the teeth. The inner wall of the sleeve has several staggered first guide grooves and second guide grooves in the circumferential direction. The rotary cam can alternately connect with the first guide groove or with the second guide groove. The first guide groove and the second guide groove are slidably connected to the protrusions and limit the position of the control rod.

[0014] Preferably, the length of the first guide groove is greater than the length of the second guide groove, and the depth of the first guide groove is greater than the depth of the second guide groove.

[0015] Preferably, the push rod has a sleeve rod at its rear end, and the rotary cam is sleeved on the sleeve rod; the rear end of the rear wheel seat has a first groove with an upward opening, the front end of the first groove has a first arc-shaped opening that matches the shape of the push rod, and the rear end of the first groove has a second arc-shaped opening that matches the shape of the sleeve; the front end of the sleeve has a retaining ring, and the retaining ring engages with the first groove.

[0016] Preferably, the rear end of the rear slider is provided with a first internal thread, and the front end of the push rod is provided with a first screw, the first screw being connected to the first internal thread.

[0017] Preferably, the push rod has an annular flange at its front end, the rear slide block has a second groove at its rear end, the second groove has a third arc-shaped opening facing upward at its front end, the shape of the annular flange is adapted to the third arc-shaped opening, and the annular flange is engaged in the second groove.

[0018] Secondly, this utility model provides a front and rear linkage pulley device, including the aforementioned pulley device, a front wheel seat, a linkage component, and a second pulley assembly. The second pulley assembly includes a second pulley axle and second pulleys respectively disposed at both ends of the second pulley axle. The front wheel seat has an opening at its rear end, and the rear wheel seat has an opening at its front end. One end of the linkage component extends from the rear end opening of the front wheel seat and connects to a telescopic component through the front end opening of the rear wheel seat. The front wheel seat has a second sliding cavity in the middle, and the second sliding cavity has second pulley grooves arranged side by side on both sides. The second pulley grooves and the second sliding cavity share a sidewall, and the sidewall has a second wheel axle groove. The second pulleys are respectively placed in the second pulley grooves, and the lower end of the second sliding cavity is connected to a second cover plate.

[0019] Preferably, the linkage component includes a front slider and a linkage rod, one end of which is detachably connected to the front slider, and the other end of which passes through an elastic element and is detachably connected to the rear slider.

[0020] Preferably, the front and rear ends of the linkage rod are symmetrically provided with second screws, the front end of the rear slider is provided with a second internal thread, the rear end of the front slider is provided with a third internal thread, and the second screw is threadedly connected to the second internal thread and the third internal thread.

[0021] Preferably, the linkage rod is provided with second screws symmetrically at its front and rear ends, the rear slider is provided with a second internal thread opening at its front end, and the front slider is provided with a third internal thread opening at its rear end. The two second screws are respectively connected to the second internal thread opening and the third internal thread opening.

[0022] Preferably, the linkage rod has symmetrically arranged locking cylinders at its front and rear ends, the rear slider has a third groove at its front end, the rear end of the third groove has a fourth arc-shaped opening facing upwards, the rear end of the front slider has a fourth groove, the front end of the fourth groove has a fifth arc-shaped opening facing upwards, and the two locking cylinders are respectively locked into the fourth arc-shaped opening and the fifth arc-shaped opening.

[0023] Preferably, the front slider is provided with a second inclined groove, a second arc-shaped groove and a limiting groove that run through the left and right directions and open downwards, the rear end of the second inclined groove is connected to the second arc-shaped groove, and the rear end of the second arc-shaped groove is connected to the limiting groove.

[0024] Thirdly, this utility model provides a heeled shoe sole, including the aforementioned pulley device or front-to-back linkage pulley device, and also includes a sole body. The sole body is provided with a receiving cavity, the pulley device or front-to-back linkage pulley device is installed in the receiving cavity, and the telescopic component extends rearward to the outside of the sole body.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] 1. The pulley device provided by this utility model utilizes the telescopic mechanism of a ballpoint pen and is equipped with a telescopic component. A first arc-shaped groove is provided on the rear slider. The extension or retraction of the rear pulley can be achieved by simply pressing the control lever. This operation is convenient and quick, and ensures that the pulley has a suitable height when extended, thereby improving the safety and stability during the sliding process.

[0027] 2. The front and rear linkage pulley device provided by this utility model realizes the synchronous automatic extension or retraction of the front and rear pulleys by setting a linkage rod, which simplifies the operation process and allows users to easily switch the pulley state with a single action. Moreover, it effectively solves the common problem of easy loss of the front wheel in previous semi-automatic four-wheel sliding devices, and improves the user experience and satisfaction.

[0028] 3. The roller shoe sole provided by this utility model allows for easy and quick transition from ordinary sole to gliding mode by simply pushing open the sliding cover and pressing the control lever. After gliding, the user only needs to press the control lever again to automatically retract the wheels. Pushing the sliding cover back into place then completely retracts the wheels into the sole, ensuring its flatness and safety. The entire operation is simple, quick, and safe, making it suitable for teenagers. Attached Figure Description

[0029] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0030] In the attached diagram:

[0031] Figure 1 It was an explosion of the pulley system. Figure 1 ;

[0032] Figure 2 It was an explosion of the pulley system. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the cross-section of the sleeve;

[0034] Figure 4 This is a schematic diagram of the rear slider structure;

[0035] Figure 5 A cross-sectional view of the pulley mechanism with the pulley locked in the retracted position;

[0036] Figure 6 A cross-sectional view of the pulley mechanism locked in the extended position;

[0037] Figure 7 This is a schematic diagram of the first embodiment of the rear slider, rear wheel seat, and push rod in the pulley device;

[0038] Figure 8 This is a schematic diagram of a second embodiment of the pulley device, including the rear slider, rear wheel seat, and push rod.

[0039] Figure 9 This is a schematic diagram of the third embodiment of the pulley device, including the rear slider, rear wheel seat, and push rod.

[0040] Figure 10 This is a schematic diagram of the fourth embodiment of the pulley device, including the rear slider, rear wheel seat, and push rod.

[0041] Figure 11 This is an exploded view of the front and rear linkage pulley device;

[0042] Figure 12 This is a cross-sectional schematic diagram of the pulleys locked in the retracted position in the front and rear linkage pulley device;

[0043] Figure 13 This is a cross-sectional schematic diagram of the pulleys locked in the extended position in the front and rear linkage pulley device;

[0044] Figure 14 This is a schematic diagram of the front slider structure;

[0045] Figure 15 This is a schematic diagram of the first embodiment of the rear slider, rear wheel seat and linkage rod in the front and rear linkage pulley device;

[0046] Figure 16 This is a schematic diagram of the second embodiment of the rear slider, rear wheel seat, and linkage rod in the front and rear linkage pulley device;

[0047] Figure 17 This is a schematic diagram of the third embodiment of the rear slider, rear wheel seat, and linkage rod in the front and rear linkage pulley device;

[0048] Figure 18 This is a schematic diagram of the fourth embodiment of the rear slider, rear wheel seat, and linkage rod in the front and rear linkage pulley device;

[0049] Figure 19 This is a schematic diagram of the sole structure of a Heely shoe.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Rear wheel seat; 11. First sliding cavity; 13. First wheel axle groove; 100. First cover plate; 141. First groove; 1411. First arc-shaped opening; 1412. Second arc-shaped opening; 101. First sliding groove; 102. First sliding cover; 110. Fixing groove;

[0052] 2. First pulley assembly; 21. First pulley shaft; 22. First pulley;

[0053] 3. Telescopic component; 31. Elastic element; 32. Rear slider; 33. Push rod; 34. Rotary cam; 35. Control rod; 36. Sleeve; 3211. First inclined groove; 3212. First arc-shaped groove; 341. Tooth head; 351. Protrusion; 352. Serrated snap-fit ​​groove; 361. First guide groove; 362. Second guide groove; 331. Sleeve rod; 363. Guide part; 3631. Guide inclined surface; 3621. Snap-fit ​​inclined surface; 3411. Engaging inclined surface; 364. Snap ring; 321. First internal thread opening; 332. First screw; 333. Annular flange; 322. Second groove; 323. Third arc-shaped opening; 324. Second internal thread opening; 325. Third groove; 326. Fourth arc-shaped opening;

[0054] 4. Front wheel seat; 41. Second sliding cavity; 42. Second pulley groove; 43. Second wheel axle groove; 400. Second cover plate; 401. Second sliding groove; 402. Second sliding cover;

[0055] 5. Linkage components; 51. Front slider; 52. Linkage rod; 511. Third internal thread opening; 5111. Second inclined groove; 5112. Second arc-shaped groove; 5113. Limiting groove; 521. Second screw; 522. Snap-fit ​​cylinder; 512. Fourth groove; 513. Fifth arc-shaped opening;

[0056] 6. Second pulley assembly; 61. Second pulley shaft; 62. Second pulley;

[0057] 7. Shoe sole body; 71. Receiving cavity; 72. Cover plate; Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0059] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0061] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0062] In this utility model, the directional terms used, such as "front end", "rear end", "upper end", "lower end", "left", and "right", are all determined based on the actual use of the pulley device. For example, when the pulley device is installed on the heel of a shoe, the part where the hand presses the control lever is the rear end of the pulley device, i.e., the direction of the heel of the shoe, and the lower end of the pulley device is the direction of the sole of the shoe.

[0063] Example 1

[0064] like Figure 1-6As shown, the pulley device of this utility model includes a rear wheel seat 1, a first pulley assembly 2, and a telescopic component 3. The rear wheel seat 1 is used to accommodate the first pulley assembly 2 and the telescopic component 3. The first pulley assembly 2 includes a first pulley shaft 21 and first pulleys 22 rotatably disposed at both ends of the first pulley shaft 21. The rear wheel seat 1 has a first sliding cavity 11 in the middle, and first pulley grooves 12 arranged side by side on both sides of the first sliding cavity 11. The first pulley grooves 12 and the first sliding cavity 11 share a sidewall, and the sidewall is provided with a first wheel axle. The first pulley 22 is respectively placed in the corresponding first pulley groove 12, and the first pulley shaft 21 is placed in the corresponding first wheel shaft groove 13. The first pulley shaft 21 can slide up and down along the first wheel shaft groove 13, so that the first pulley 22 is in the extended position or the retracted position. The lower end of the first sliding cavity 11 is provided with a first cover plate 100. One end of the first cover plate 100 is snapped with the rear wheel seat 1, and the other end is connected to the rear wheel seat 1 by screws. The first cover plate 100 plays a blocking role to prevent the first pulley shaft 21 from falling to the ground.

[0065] The rear wheel seat 1 has an opening at its rear end. One end of the telescopic component 3 is located inside the first sliding cavity 11, and the other end extends outward from the opening at the rear end of the rear wheel seat 1. The front end of the telescopic component 3 includes an elastic element 31 and a rear slider 32. The front end of the elastic element 31 is connected to the first sliding cavity 11, and the rear end of the elastic element 31 is connected to the rear slider 32.

[0066] The rear slider 32 is provided with a first inclined groove 3211 that runs through the left and right directions and opens downwards and a first arc groove 3212. The rear end of the first inclined groove 3211 is connected to the first arc groove 3212. The shape of the first arc groove 3212 is adapted to the shape of the first pulley shaft 21, so that the first pulley shaft 21 can slide smoothly along the first arc groove 3212.

[0067] The telescopic component 3 moves forward under the action of thrust to apply a thrust to the rear slider 32, thereby compressing the elastic element 31. As a result, the elastic element 31 will generate a rearward restoring force due to elastic deformation, and the telescopic component 3 locks the first pulley 22 in the extended or retracted position by means of the restoring force of the elastic element 31.

[0068] As an optional embodiment, the vertical height from the lowest point of the first arc-shaped groove 3212 to the upper end of the first cover plate 100 is greater than the height of the first pulley shaft 21. In the sliding state, the first pulley 22 will engage with the first arc-shaped groove 3212.

[0069] When the first pulley 22 is in the retracted position, when the user presses the telescopic component 3 and applies a pushing force to the telescopic component 3, the rear slider 32 moves forward and compresses the elastic element 31. As the rear slider 32 gradually moves forward, the first pulley shaft 21 moves vertically downward along the inclined surface of the first inclined groove 3211 and the first wheel shaft groove 13 to the arc surface of the first arc groove 3212, and finally stops at the lower end of the first arc groove 3212. After the pushing force is released, that is, after the hand is released, the elastic element 31 releases the restoring force, and the rear slider 32 moves backward, but the movement distance is limited. At this time, the first pulley 22 is between the first arc groove 3212 and the first cover plate 100.

[0070] When the first pulley 22 is in the extended position, the user presses the telescopic component 3 to apply a pushing force to the telescopic component 3. The rear slider 32 moves forward to compress the elastic element 31. After the user releases the hand, the elastic element 31 releases the restoring force, and the rear slider 32 gradually moves backward. The first pulley shaft 21 will first move vertically upward along the arc surface of the first arc groove 3212 and the first wheel shaft groove 13, and then move vertically upward along the inclined surface of the first inclined groove 3211 and the first wheel shaft groove 13 to the upper end of the first inclined groove 3211, so that the first pulley 22 is locked in the retracted position.

[0071] The telescopic component 3 also includes a push rod 33, a rotary cam 34, a control rod 35, and a sleeve 36. The push rod 33 is detachably connected to the rear slider 32. The rotary cam 34 is sleeved on the push rod 33. The rotary cam 34 is uniformly provided with multiple teeth 341 in the circumferential direction. The control rod 35 is uniformly provided with multiple protrusions 351 in the circumferential direction. The front end of the control rod 35 is provided with a serrated locking groove 352 that connects to the teeth 341. The inner wall of the sleeve 36 is provided with a number of staggered first guide grooves 361 and second guide grooves 362 in the circumferential direction.

[0072] The control lever 35 is capable of moving within the sleeve 36 along its length and applying a thrust to the rotary cam 34; the sleeve 36 guides the control lever 35 within it and connects to the rotary cam 34 to lock the position of the first pulley 22; under the push of the control lever 35, the rotary cam 34 can alternately connect to the first guide groove 361 or the second guide groove 362.

[0073] When the rotating cam 34 is connected to the first guide groove 361, the first pulley 22 is locked in the extended position; when the rotating cam 34 is connected to the second guide groove 362, the first pulley 22 is locked in the retracted position.

[0074] Specifically, the first guide groove 361 and the second guide groove 362 are slidably connected to the protrusion 351 and limit the control rod 35, restricting its movement direction; the rear end of the push rod 33 is provided with a sleeve rod 331, and the rotary cam 34 is sleeved on the sleeve rod 331. When the rotary cam 34 is subjected to a forward force, the rotary cam 34 will push the push rod 33 forward, thereby pushing the rear slider 32 forward; when the rotary cam 34 is subjected to a backward force, the rotary cam 34 will rotate circumferentially and connect with the first guide groove 361 or the second guide groove 362.

[0075] The length of the first guide groove 361 is greater than the length of the second guide groove 362, and the depth of the first guide groove 361 is greater than the depth of the second guide groove 362. A guide portion 363 is provided between the first guide groove 361 and the second guide groove 362. A guide slope 3631 is provided at the front end of the guide portion 363, and a snap-fit ​​slope 3621 is provided at the front end of the second guide groove 362. The guide slope 3631 and the snap-fit ​​slope 3621 are adapted to guide the tooth head 341 to abut against the snap-fit ​​slope 3621. A sharp corner area is formed between the second guide groove 362 and the two adjacent guide portions 363, and the rotating cam 34 can snap into the sharp corner area.

[0076] Specifically, the rear end of the tooth head 341 of the rotary cam 34 is provided with a engagement slope 3411, which is adapted to the guide slope 3631. The guide slope 3631 allows the engagement slope 3411 to be alternately connected with the first guide groove 361 and the second guide groove 362.

[0077] For locking the first pulley 22 in the retracted position, the engagement slope 3411 of the tooth head 341 can slide along the first guide groove 361 and connect with the first guide groove 361; for locking the first pulley 22 in the extended position, the engagement slope 3411 of the tooth head 341 can engage with the guide slope 3631 and the locking slope 3621 of the second guide groove 362, that is, the final engagement slope 3411 abuts against the locking slope 3621, so that the tooth head 341 is locked in the aforementioned sharp corner area, thereby preventing the rotating cam 34 from moving further and locking the first pulley 22 in the extended position.

[0078] The rear wheel seat 1 has a first groove 141 with an upward opening at the rear end, a first arc-shaped opening 1411 with an upward opening at the front end of the first groove 141 that matches the shape of the push rod 33, and a second arc-shaped opening 1412 with an upward opening at the rear end of the first groove 141 that matches the shape of the sleeve 36.

[0079] Specifically, the sleeve 36 has a retaining ring 364 at its rear end. The shape of the retaining ring 364 is adapted to the first groove 141. The retaining ring 364 can be directly placed on the first groove 141 and engaged with the first groove 141 to engage the sleeve 36 on the rear wheel seat 1, which is convenient for assembly. Since the second arc-shaped opening 1412 is adapted to the shape of the sleeve 36, it can provide support for the sleeve 36 and increase the structural stability.

[0080] The rear slider 32 and the push rod 33 can be connected in various ways. Specifically, one such connection method is as follows: Figure 7 As shown, the rear slider 32 is threadedly connected to the push rod 33. The rear end of the rear slider 32 is provided with a first internal thread 321, and the front end of the push rod 33 is provided with a first screw 332. After the first screw 332 is placed in the first internal thread 321 and rotated, the first screw 332 and the first internal thread 321 can be quickly installed. At the same time, since the shape of the first arc-shaped opening 1411 is adapted to the shape of the push rod 33, it can provide support for the push rod 33, making the structure more stable.

[0081] Another connection method, such as Figure 8 As shown, the rear slider 32 is engaged with the push rod 33. The front end of the push rod 33 is provided with an annular flange 333, and the rear end of the rear slider 32 is provided with a second groove 322. The front end of the second groove 322 is provided with a third arc-shaped opening 323 facing upward. The shape of the annular flange 333 is adapted to the third arc-shaped opening 323. The depth of the third arc-shaped opening 323 is deeper than that of the second groove 322. The annular flange 333 is engaged in the second groove 322, and the middle part of the push rod 33 is engaged in the second groove 322, making the rear slider 32 and the push rod 33 more tightly engaged. At the same time, this connection method can improve the assembly speed.

[0082] Another connection method, such as Figure 9 As shown, the rear slider 32 is threadedly connected to the push rod 33, and... Figure 8 The difference in this embodiment is that the front end of the push rod 33 is provided with a first screw 332, and the rear end of the rear slider 32 is provided with a first internal thread 321. That is, the front end of the second groove 322 is provided with a first internal thread 321. During assembly, the push rod 33 is placed on the third arc-shaped opening 323 and the first screw 332 is rotated to achieve a threaded connection between the first screw 332 and the first internal thread 321. The middle part of the push rod 33 is engaged in the second groove 322, which can provide support for the push rod 33, making the connection between the rear slider 32 and the push rod 33 tighter and the structure more stable.

[0083] Another connection method, such as Figure 10 As shown, with Figure 9The difference in this embodiment is that the front end of the push rod 33 is provided with an annular flange 333, which is engaged in the second groove 322. The middle part of the push rod 33 is also engaged in the second groove 322, making the rear slider 32 and the push rod 33 more tightly engaged. At the same time, this connection method can improve the assembly speed.

[0084] The bottom surface of the rear wheel seat 1 is provided with first sliding grooves 101 at both ends, corresponding to the first pulley groove 12. The first cover plate 100 cooperates with the first sliding groove 101. A first sliding cover 102 is slidably connected in the first sliding groove 101. The first sliding cover 102 can slide on the first sliding groove 101 to cover and hide the first pulley 22. The first sliding cover 102 can also prevent impurities from entering the first pulley groove 12, ensuring that the first pulley 22 rotates normally and protecting the user's personal safety.

[0085] Furthermore, the front end of the first sliding cavity 11 is provided with a fixing groove 110, and the front end of the elastic element 31 is embedded in the fixing groove 110 to prevent the elastic element 31 from shifting. The rear end of the elastic element 31 is connected to the rear slider 32 to fix the elastic element 31 between the first sliding cavity 11 and the rear slider 32. The elastic element 31 is preferably a compression spring.

[0086] The working process of this embodiment:

[0087] The working principle of the telescopic component 3 of this utility model is similar to that of a ballpoint pen. Initially, the first pulley 22 is housed in the first pulley groove 12, the control rod 35 and the rotating cam 34 are both located in the sleeve 36, and the rear slider 32 is located at the rear end of the first sliding cavity 11.

[0088] In use, the user pushes open the first sliding cover 102 and presses the control lever 35. Under the action of the thrust, the protrusion 351 of the control lever 35 moves forward along the first guide groove 361 and the second guide groove 362. Since the engagement slope 3411 contacts the serrated locking groove 352, the control lever 35 can push the rotary cam 34 forward, thereby applying a thrust to the push rod 33, the rear slider 32, and the elastic element 31. At this time, the elastic element 31 is squeezed. As the rear slider 32 slides forward, the first pulley shaft 21 moves vertically downward along the slope of the first inclined groove 3211 and the first wheel shaft groove 13 to the arc surface of the first arc groove 3212, causing the first pulley 22 to extend downward. When the first pulley 22 is in the extended position, the rotary cam 34 completely moves out of the sleeve 36 so that the engagement slope 3411 of the rotary cam 34 can subsequently engage with the second guide groove 362. A portion of the serrated locking groove 352 also moves out of the first guide groove 361 and the second guide groove 362. When the thrust is released, i.e., when the hand is released, the rear slider 32 moves backward due to the restoring force of the elastic element 31, locking the first pulley 22 at the lower end of the first arc-shaped groove 3212, and the rotating cam 34 also moves backward as a result. Since the engaging inclined surface 3411 contacts the sawtooth locking groove 352, the rotating cam 34 will rotate circumferentially during the backward movement. The engaging inclined surface 3411 will move along the guide inclined surface 3631 to the locking inclined surface 3621, so that the rotating cam 34 is locked in the aforementioned sharp corner area and abuts against the locking inclined surface 3621 of the second guide groove 362, thereby preventing the rotating cam 34 from moving. Finally, the first pulley 22 can be locked in the extended position.

[0089] After pressing the control lever 35 again, under the action of the thrust, the protrusion 351 of the control lever 35 moves forward along the first guide groove 361 and the second guide groove 362, moves the rotary cam 34 out of the second guide groove 362, pushes the push rod 33 and the rear slider 32 forward to compress the elastic element 31, and the rotary cam 34 will also rotate circumferentially. When the thrust is released, under the restoring force of the elastic element 31, the rear slider 32 will move backward, thereby pushing the push rod 33 and the rotary cam 34 to move backward. On the one hand, since the rear slider 32 is provided with the first arc groove 3212, the first pulley shaft 21 will first move vertically upward along the arc surface of the first arc groove 3212 and the first wheel shaft groove 13, and then move vertically upward along the inclined surface of the first inclined groove 3211 and the first wheel shaft groove 13 to the upper end of the first inclined groove 3211, so that the first pulley 22 retracts into the first pulley groove 12. On the other hand, the engaging inclined surface 3411 will also continue to rotate circumferentially and gradually move along the adjacent guide inclined surface 3631 into the first guide groove 361, and finally stop moving, so that the first pulley 22 is locked in the retracted position. At this time, pushing the first sliding cover 102 to cover the first pulley groove 12 can prevent dust and other impurities from entering the first pulley groove 12.

[0090] The pulley device of this utility model can extend or retract the first pulley 22 by pressing the control lever 35. This operation is convenient and quick, and ensures that the first pulley 22 has a suitable height when extended, which can improve the safety and stability during the sliding process.

[0091] Example 2

[0092] like Figure 11-14 As shown, this utility model also provides a front and rear linkage pulley device, including a pulley device, a front wheel seat 4, a linkage component 5, and a second pulley assembly 6. The second pulley assembly 6 includes a second pulley shaft 61 and second pulleys 62 rotatably disposed at both ends of the second pulley shaft 61. The front wheel seat 4 has an opening at its rear end, and the rear wheel seat 1 has an opening at its front end. One end of the linkage component 5 extends from the rear end opening of the front wheel seat 4 and connects to the telescopic component 3 through the front end opening of the rear wheel seat 1. The linkage component 5 can slide back and forth within the first sliding cavity 11 and the second sliding cavity 41.

[0093] The front wheel seat 4 has a second sliding cavity 41 in the middle. The second sliding cavity 41 has second pulley grooves 42 arranged side by side on both sides. The second pulley grooves 42 and the second sliding cavity 41 share a side wall. The side wall has a second wheel axle groove 43. The two second pulleys 62 can be respectively placed in the corresponding second pulley grooves 42. The second pulley axle 61 is placed in the corresponding second wheel axle groove 43. The second pulley axle 61 can move vertically up and down along the second wheel axle groove 43. The lower end of the second sliding cavity 41 has a second cover plate 400. One end of the second cover plate 400 is snapped into the front wheel seat 4, and the other end is connected to the front wheel seat 4 by screws. The second cover plate 400 serves as a blocking function to prevent the second pulley axle 61 from falling to the ground.

[0094] The telescopic component 3 moves forward under the action of thrust to apply a thrust to the linkage component 5. During the pushing process, the rear slider 32 moves forward, the elastic element 31 is compressed, and the linkage component 5 moves forward. The telescopic component 3 and the linkage component 5 lock the first pulley 22 and the second pulley 62 in the extended position or the retracted position by means of the restoring force of the elastic element 31.

[0095] The linkage component 5 includes a front slider 51 and a linkage rod 52. One end of the linkage rod 52 is detachably connected to the front slider 51, and the other end passes through the elastic member 31 and is detachably connected to the rear slider 32.

[0096] like Figure 14As shown, the front slider 51 is provided with a second inclined groove 5111 that runs through the left and right directions and opens downwards, a second arc-shaped groove 5112, and a limiting groove 5113. The rear end of the second inclined groove 5111 is connected to the second arc-shaped groove 5112, and the rear end of the second arc-shaped groove 5112 is connected to the limiting groove 5113. The limiting groove 5113 is L-shaped and is used to limit the movement distance of the front slider 51. The shape of the second arc-shaped groove 5112 is adapted to the shape of the second pulley shaft 61, so that the second pulley shaft 61 can slide smoothly along the second arc-shaped groove 5112.

[0097] As an optional embodiment, the vertical height from the lowest point of the second arc-shaped groove 5112 to the upper end of the second cover plate 400 is greater than the height of the second pulley shaft 61. In the sliding state, the first pulley 22 is engaged in the first arc-shaped groove 3212, and the second pulley 62 is engaged in the second arc-shaped groove 5112.

[0098] When the first pulley 22 and the second pulley 62 are in the retracted position, applying a pushing force to the telescopic component 3 will push the linkage rod 52 forward, thereby causing the front slider 51 to move forward. As the front slider 51 gradually moves forward, the second pulley shaft 61 will move vertically downwards along the inclined surface of the second inclined groove 5111 and the second wheel shaft groove 43 to the arc surface of the second arc groove 5112, eventually stopping at the lower end of the first arc groove 3212. After releasing the pushing force, i.e., after the hand is released, the front slider 51 will move backward, but the movement distance is limited. At this time, the second pulley 62 is positioned between the second arc groove 5112 and the second cover plate 4. When the first pulley 22 and the second pulley 62 are in the retracted position, a thrust is applied to the telescopic component 3, and the front slider 51 moves forward to compress the elastic element 31. The limiting groove 5113 will limit the movement distance of the front slider 51. After the hand is released, the elastic element 31 releases the rebound force, and the front slider 51 gradually moves backward. The second pulley shaft 61 will first move vertically upward along the arc surface of the second arc groove 5112 and the second wheel shaft groove 43, and then move vertically upward along the inclined surface of the second inclined groove 5111 and the second wheel shaft groove 43 to the upper end of the second inclined groove 5111, so that the second pulley 62 is locked in the retracted position.

[0099] The linkage rod 52 can be connected to the front slider 51 and the rear slider 32 in multiple ways, one of which is as follows: Figure 15 As shown, the linkage rod 52 is threadedly connected to the front slider 51 and the rear slider 32. The linkage rod 52 is symmetrically provided with second screws 521 at its front and rear ends. The rear slider 32 is provided with a second internal thread 324 at its front end and a third internal thread 511 at its rear end. The second screws 521 are threadedly connected to the second internal thread 324 and the third internal thread 511.

[0100] Another connection method, such as Figure 16As shown, the linkage rod 52 engages with the rear slider 32 and the front slider 51. The linkage rod 52 has symmetrically arranged engaging cylinders 522 at its front and rear ends. The rear slider 32 has a third groove 325 at its front end, and a fourth arc-shaped opening 326 facing upwards at its rear end. The front slider 51 has a fourth groove 512 at its rear end, and a fifth arc-shaped opening 513 facing upwards at its front end. The fourth arc-shaped opening 326 is deeper than the third groove 325. The depth of groove 513 is deeper than that of the fourth groove 512. The shape of the snap-fit ​​cylinder 522 is adapted to the fifth arc-shaped opening 513 and the fourth arc-shaped opening 326. The two snap-fit ​​cylinders 522 are snapped into the fourth arc-shaped opening 326 and the fifth arc-shaped opening 513 respectively. The two ends of the linkage rod 52, except for the snap-fit ​​cylinders 522, are snapped into the third groove 325 and the fourth groove 512, so that the linkage rod 52 has a stable supporting force, making the connection between the linkage rod 52 and the rear slider 32 and the front slider 51 tighter and improving the assembly speed.

[0101] Another connection method, such as Figure 17 As shown, with Figure 16 The difference in this embodiment is that the linkage rod 52 is symmetrically provided with second screws 521 at its front and rear ends, the rear slider 32 is provided with a second internal thread 324 at its front end, that is, the front end of the fourth arc-shaped opening 326 is provided with a second internal thread 324; the rear end of the front slider 51 is provided with a third internal thread 511, that is, the rear end of the fifth arc-shaped opening 513 is provided with a third internal thread 511. The second screws 521 are threadedly connected to the second internal thread 324 and the third internal thread 511 respectively, and the two ends of the linkage rod 52 other than the second screws 521 are engaged with the third groove 325 and the fourth groove 512, so that the linkage rod 52 is more tightly connected with the rear slider 32 and the front slider 51, and has a stable supporting force.

[0102] Another connection method, such as Figure 18 As shown, with Figure 17 The difference in this embodiment is that the front and rear ends of the linkage rod 52 are symmetrically provided with locking cylinders 522. The locking cylinders 522 are respectively locked into the fourth arc-shaped opening 326 and the fifth arc-shaped opening 513. The two ends of the linkage rod 52 other than the locking cylinders 522 are locked into the third groove 325 and the fourth groove 512, so that the linkage rod 52 is more tightly connected with the rear slider 32 and the front slider 51, and the assembly speed is improved.

[0103] The bottom surface of the front wheel seat 4 has two ends respectively provided with second sliding grooves 401 corresponding to the second pulley groove 42. The second cover plate 400 cooperates with the second sliding groove 401. A second sliding cover 402 is slidably connected in the second sliding groove 401. The second sliding cover 402 can slide on the second sliding groove 401 to cover and hide the second pulley 62. The second sliding cover 402 can also prevent dust, sand and other substances from entering the second pulley groove 42, ensuring that the second pulley 62 rotates normally and protecting the user's personal safety.

[0104] The working process of this embodiment:

[0105] The working principle of the telescopic component 3 of this utility model is similar to that of a ballpoint pen. Initially, the first pulley 22 and the second pulley 62 are respectively housed in the first pulley groove 12 and the second pulley groove 42. The control rod 35 and the rotating cam 34 are both located in the sleeve 36. The rear slider 32 is located at the rear end of the first sliding cavity 11, and the front slider 51 is located in the second sliding cavity 41.

[0106] In use, the user pushes open the first sliding cover 102 and the second sliding cover 402, and presses the control lever 35. Under the action of the thrust, the protrusion 351 of the control lever 35 moves forward along the first guide groove 361 and the second guide groove 362. Since the engaging inclined surface 3411 contacts the sawtooth locking groove 352, the control lever 35 can push the rotating cam 34 forward, thereby applying a thrust to the push rod 33, the rear slider 32, the elastic element 31, the linkage rod 52 and the front slider 51. At this time, the elastic element 31 is squeezed. As the rear slider 32 slides forward, the first pulley shaft 21 moves vertically downward along the inclined surface of the first inclined groove 3211 and the first wheel axle groove 13 to the arc surface of the first arc groove 3212, so that the first pulley 22 extends downward. As the front slider 51 slides forward, the second pulley shaft 61 moves vertically downward along the inclined surface of the second inclined groove 5111 and the second wheel axle groove 43 to the arc surface of the second arc groove 5112, so that the second pulley 62 extends. When the first pulley 22 and the second pulley 62 are in the extended position, the rotary cam 34 is completely removed from the sleeve 36 so that the engagement slope 3411 of the rotary cam 34 can subsequently engage with the second guide groove 362, and a portion of the serrated locking groove 352 also moves out of the first guide groove 361 and the second guide groove 362. When the thrust is released, i.e., when the hand is released, the rear slider 32 moves backward due to the restoring force of the elastic member 31, locking the first pulley 22 at the lower end of the first arc-shaped groove 3212; the backward movement of the rear slider 32 also causes the linkage member 5 and the rotary cam 34 to move backward, locking the second pulley 62 at the lower end of the second arc-shaped groove 5112. Since the engagement slope 3411 contacts the sawtooth locking groove 352, the rotating cam 34 rotates during the backward movement. The engagement slope 3411 moves along the guide slope 3631 to the locking slope 3621, so that the rotating cam 34 is locked in the aforementioned sharp corner area and abuts against the locking slope 3621 of the second guide groove 362, thereby preventing the rotating cam 34 from moving. Finally, the first pulley 22 and the second pulley 62 can be locked in the extended position.

[0107] When the control lever 35 is pressed again, under the action of the thrust, the protrusion 351 of the control lever 35 moves forward along the first guide groove 361 and the second guide groove 362, moving the rotary cam 34 out of the second guide groove 362, pushing the push rod 33 and the rear slider 32 forward to compress the elastic element 31 and push the linkage component 5. The rotary cam 34 will also rotate circumferentially. When the thrust is released, under the action of the rearward restoring force of the elastic element 31, the rear slider 32 will move backward, thereby pushing the push rod 33 and the rotary cam 34 to also drive the linkage component 5 to move backward. On one hand, because the rear slider 32 is provided with a first arc-shaped groove 3212, the first pulley shaft 21 will first move vertically upward along the arc surface of the first arc-shaped groove 3212 and the first wheel shaft groove 13, and then move vertically upward along the inclined surface of the first inclined groove 3211 and the first wheel shaft groove 13 to the upper end of the first inclined groove 3211, causing the first pulley 22 to retract into the first pulley groove 12; because the front slider 51 is provided with a second arc-shaped groove 5112, the second pulley shaft 61 will first move vertically upward along the arc surface of the second arc-shaped groove 5112 and the second wheel shaft groove 43, and then move vertically upward along the inclined surface of the second inclined groove 5111 and the second wheel shaft groove 43 to the upper end of the second inclined groove 5111. On the other hand, the engaging inclined surface 3411 will also continue to rotate circumferentially and gradually move along the adjacent guide inclined surface 3631 into the first guide groove 361, and finally stop moving, locking the first pulley 22 and the second pulley 62 in the retracted position. At this time, pushing the first sliding cover 102 and the second sliding cover 402 to cover the first pulley groove 12 and the second pulley groove 42 can prevent dust and other substances from entering the first pulley groove 12 and the second pulley groove 42.

[0108] The front and rear linkage pulley device of this utility model realizes the synchronous automatic extension or retraction of the front and rear first pulleys 22 and 62 by setting the linkage rod 52, which simplifies the operation process and allows users to easily switch the pulley state with a single action. It effectively solves the common problem of easy loss of the front wheel in the previous semi-automatic four-wheel sliding device, improves the user experience and satisfaction, and can effectively reduce the height of the pulley, making the sliding process safer.

[0109] Example 3

[0110] This utility model also provides a heeled shoe sole, including the above-mentioned pulley device or front and rear linked pulley device, and also includes a sole body 7. The sole body 7 is provided with a receiving cavity 71. The pulley device or front and rear linked pulley device is fixedly installed in the receiving cavity 71. The control rod 35 extends rearward to the outside of the sole body 7. The pulley device or front and rear linked pulley device is provided with a cover plate 72 for covering and protecting the pulley device.

[0111] The roller shoe sole provided by this utility model allows for easy and quick transition from a regular sole to gliding mode by simply pushing open the sliding cover and pressing the control lever 35. After gliding, the user simply presses the control lever 35 again, and the first and second pulleys 22 and 62 automatically retract. Pushing the first and second sliding covers 102 and 402 back into their original positions completely retracts the first and second pulleys 22 and 62 into the sole, ensuring its flatness and safety. The entire operation is simple, quick, and safe, making it suitable for teenagers.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pulley arrangement characterised in that: The device includes a rear wheel seat (1), a first pulley assembly (2), and a telescopic component (3). The rear wheel seat (1) is used to accommodate the first pulley assembly (2) and the telescopic component (3). The first pulley assembly (2) includes a first pulley shaft (21) and first pulleys (22) respectively disposed at both ends of the first pulley shaft (21). The rear wheel seat (1) has a first sliding cavity (11) in the middle. The first sliding cavity (11) has first pulley grooves (12) arranged side by side on both sides. The first pulley grooves (12) and the first sliding cavity (11) share a side wall. The side wall has a first wheel axle groove (13). The first pulleys (22) can be stored in the first pulley grooves (12). The lower end of the first sliding cavity (11) is connected to a first cover plate (100). The telescopic component (3) includes an elastic element (31) and a rear slider (32) at its front end. The front end of the elastic element (31) is connected to the first sliding cavity (11), and the rear end of the elastic element (31) is connected to the rear slider (32). The rear slider (32) is provided with a first inclined groove (3211) and a first arc-shaped groove (3212) that run through the left and right directions and open downwards. The rear end of the first inclined groove (3211) is connected to the first arc-shaped groove (3212). The telescopic component (3) can move forward under the action of thrust to apply a thrust to the rear slider (32), compress the elastic element (31), and the telescopic component (3) locks the first pulley (22) in the extended position or the retracted position by means of the restoring force of the elastic element (31).

2. The pulley arrangement of claim 1, wherein: The telescopic component (3) further includes a push rod (33), a rotary cam (34), a control rod (35), and a sleeve (36). The push rod (33) is detachably connected to the rear slider (32). The rotary cam (34) is sleeved on the push rod (33). The rotary cam (34) has a plurality of teeth (341) evenly distributed in the circumferential direction. The control rod (35) has a plurality of protrusions (351) evenly distributed in the circumferential direction. The front end of the control rod (35) has a sawtooth-shaped locking groove (352) connected to the teeth (341). The inner wall of the sleeve (36) has a plurality of staggered first guide grooves (361) and second guide grooves (362) in the circumferential direction. The rotary cam (34) can be alternately connected to the first guide groove (361) or to the second guide groove (362). The first guide groove (361) and the second guide groove (362) are slidably connected to the protrusions (351) and limit the control rod (35).

3. The pulley arrangement of claim 2, wherein: The length of the first guide groove (361) is greater than the length of the second guide groove (362), and the depth of the first guide groove (361) is greater than the depth of the second guide groove (362).

4. The pulley arrangement of claim 2, wherein: The push rod (33) has a sleeve rod (331) at its rear end, and the rotary cam (34) is sleeved on the sleeve rod (331); the rear wheel seat (1) has a first groove (141) with an upward opening at its rear end, the first groove (141) has a first arc-shaped opening (1411) at its front end that matches the shape of the push rod (33), and the first groove (141) has a second arc-shaped opening (1412) at its rear end that matches the shape of the sleeve (36); the sleeve (36) has a retaining ring (364) at its front end, and the retaining ring (364) engages with the first groove (141).

5. The pulley arrangement of claim 4, wherein: The rear end of the rear slider (32) is provided with a first internal thread (321), and the front end of the push rod (33) is provided with a first screw (332), which is connected to the first internal thread (321).

6. The pulley arrangement of claim 4, wherein: The push rod (33) has an annular flange (333) at its front end, and the rear slider (32) has a second groove (322) at its rear end. The second groove (322) has a third arc-shaped opening (323) with its opening facing upward at its front end. The shape of the annular flange (333) is adapted to the third arc-shaped opening (323), and the annular flange (333) is engaged in the second groove (322).

7. A fore and aft linkage pulley arrangement characterised in that: The device includes the pulley device according to any one of claims 1-6, a front wheel seat (4), a linkage component (5), and a second pulley assembly (6). The second pulley assembly (6) includes a second pulley shaft (61) and second pulleys (62) respectively disposed at both ends of the second pulley shaft (61). The front wheel seat (4) has an opening at its rear end and the rear wheel seat (1) has an opening at its front end. One end of the linkage component (5) extends from the rear end opening of the front wheel seat (4) and is connected to the telescopic component (3) through the front end opening of the rear wheel seat (1). The front wheel seat (4) has a second sliding cavity (41) in the middle. The second sliding cavity (41) has second pulley grooves (42) arranged side by side on both sides. The second pulley grooves (42) and the second sliding cavity (41) share a side wall. The side wall has a second wheel shaft groove (43). The second pulleys (62) are respectively placed in the second pulley grooves (42). The lower end of the second sliding cavity (41) is connected to a second cover plate (400).

8. The fore-aft linked pulley arrangement of claim 7, wherein: The linkage component (5) includes a front slider (51) and a linkage rod (52). One end of the linkage rod (52) is detachably connected to the front slider (51), and the other end passes through the elastic member (31) and is detachably connected to the rear slider (32).

9. The fore-aft linked pulley arrangement of claim 8, wherein: The linkage rod (52) is symmetrically provided with second screws (521) at the front and rear ends. The rear slider (32) is provided with a second internal thread (324) at the front end and a third internal thread (511) at the rear end. The two second screws (521) are respectively connected to the second internal thread (324) and the third internal thread (511).

10. The fore-and-aft linked pulley arrangement of claim 8, wherein: The linkage rod (52) has symmetrically arranged locking cylinders (522) at its front and rear ends. The rear slider (32) has a third groove (325) at its front end. The rear end of the third groove (325) has a fourth arc-shaped opening (326) with the opening facing upward. The rear end of the front slider (51) has a fourth groove (512). The front end of the fourth groove (512) has a fifth arc-shaped opening (513) with the opening facing upward. The two locking cylinders (522) are respectively locked into the fourth arc-shaped opening (326) and the fifth arc-shaped opening (513).

11. The fore-and-aft linked pulley arrangement of claim 8, wherein: The front slider (51) is provided with a second inclined groove (5111), a second arc-shaped groove (5112) and a limiting groove (5113) that run through the left and right directions and open downwards. The rear end of the second inclined groove (5111) is connected to the second arc-shaped groove (5112), and the rear end of the second arc-shaped groove (5112) is connected to the limiting groove (5113).

12. A sole for a skate shoe, characterized by: The device includes the pulley device according to any one of claims 1-6 or the front-to-back linkage pulley device according to any one of claims 7-11, and also includes a sole body (7), the sole body (7) having a receiving cavity (71), the pulley device or the front-to-back linkage pulley device being installed in the receiving cavity (71), and the telescopic member (3) extending rearward to the outside of the sole body (7).

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