Composite Anti-slip sole with pivot and lock function

Abstract

FIELD: footwear.SUBSTANCE: present invention relates to a composite anti-slip sole with a rotating and locking function, comprising a sole body and at least one group of rotating elements mounted with the possibility of rotation on the sole body. The rotary element includes a frame and a connecting part located at one end of the frame. On one side surface of the frame, several anti-slip elements are installed, containing at least two protrusions located with a difference in height, to ensure anti-slip adhesion to the surface. Through the ball-and-socket connection of the connecting part with the mating element and the lateral guiding action of the open hole, the rotating element forms a stable temporary tilted fixed state during the switching process, which can effectively prevent the accidental overturning or loosening characteristic of existing rotating anti-skid soles with a simple axial pin or a one-way latch, improving the reliability of the anti-skid function when walking and providing the user with a stable grip on complex surfaces such as ice, snow, moss, grass, mud, sand and gravel.EFFECT: improving the reliability of the anti-skid function when walking and providing the user with a stable grip on complex surfaces such as ice, snow, moss, grass, mud, sand and gravel.15 cl, 20 dwg

Description

[0001] Field of technology

[0002] The present invention relates to a composite anti-slip sole with a rotating and locking function and belongs to the field of anti-slip sole technology.

[0003] State of the art

[0004] When walking on challenging surfaces such as ice, snow, moss, grass, mud, sand, and gravel, or in wet conditions, conventional soles often fail to provide sufficient traction, significantly increasing the risk of slipping. To address this issue, various anti-slip sole designs have been developed in the prior art, some of which use fixed metal studs or anti-slip teeth to improve traction. However, when used on hard, even surfaces in everyday conditions, these fixed designs quickly wear out, leading to premature loss of anti-slip performance. Furthermore, the hard contact of the studs with the surface creates noise and accelerates overall wear of the sole, while wearing comfort leaves much to be desired.

[0005] To address the shortcomings of fixed studs, some existing technical solutions have attempted to incorporate rotating or retractable anti-slip structures. These structures allow the user to selectively display or hide the anti-slip teeth depending on surface conditions, thereby ensuring reliable traction when needed and avoiding unnecessary stud wear on ordinary surfaces. For example, patent document CN 223900322 U discloses a multifunctional combined anti-slip element and anti-slip sole that utilizes a frame and removable anti-slip studs. The studs are replaced via a threaded connection, and the anti-slip element is rotated using a universal joint.However, with this technical solution, replacing the anti-slip studs requires rotational work, threaded installation is relatively labor-intensive, and the connecting element, which uses a threaded engagement, is susceptible to cracking under load. Furthermore, the free rotation of the rotating element is unrestricted: if the user releases it during rotation or is subjected to an external force, the element may unintentionally rotate back or become loose, making the switching process uneven and difficult to operate one-handed in wet conditions. Exposure to external impacts from complex directions or frequent flexing of the sole can easily cause stress concentrations in the connecting area, affecting the service life.

[0006] To further optimize the rotation and locking performance of the anti-slip sole, Chinese Patent Document 202411246353.X discloses a rotating anti-slip mechanism and a universal anti-slip sole. By installing a ball element and a rotation axis, the anti-slip mechanism can perform spherical rotation relative to the mounting base, allowing for adjustment of the anti-slip surface orientation and somewhat simplifying the assembly process. However, in practice, it was found that despite the use of a ball joint, there is no stable intermediate locking mechanism during the rotary switching process.In particular, when switching the rotary element from its hidden position to its operating position, the lack of effective lateral guidance and temporary tilt locking makes it difficult for the user to accurately control the angle, resulting in an insufficiently smooth rotation and even unintentional back-swinging or loosening when the sole is wet or when operated one-handed. Furthermore, a simple ball-and-socket joint, when subjected to prolonged impact on complex surfaces, can still cause stress concentrations at the joint, reducing structural strength and impacting the durability and reliability of the rotary element.

[0007] Existing rotary anti-slip structures generally suffer from insufficient stability of the pivoting element under load: when walking, external impacts or flexing of the sole cause unintentional rotation or loosening. This instability further exacerbates stress concentration in the area where the pivoting element connects to the sole body, significantly reducing the structural strength of this area and, after prolonged use, leading to fatigue failure or deformation. This chain reaction of stability and strength issues ultimately leads to a reduction in the anti-slip effect.

[0008] Disclosure of invention

[0009] - presence of structural elements;

[0010] - characteristics of the element and their relationship;

[0011] The objective of the claimed invention is to improve the performance characteristics of anti-slip sole designs.

[0012] The technical result is the creation of a composite anti-slip sole with a rotation and locking function to ensure reliable adjustment of the anti-slip mode, with the aim of increasing the adaptability of the sole to various surfaces, and as a result, safety when walking and ease of use, durability and reduced maintenance costs associated with excessive wear of the studs.

[0013] The essence of the invention lies in the fact that a composite anti-slip sole with a rotation and locking function comprises a sole body and at least one group of rotary elements mounted with the possibility of rotation on the sole body, wherein the rotary element includes a frame and a connecting part located at one end of the frame, wherein several anti-slip elements are mounted on one side surface of the frame, and friction parts are made on the edges of both side surfaces of the frame, wherein the frame also contains support projections located on the side opposite the anti-slip elements and on both sides of the friction parts, wherein the anti-slip element contains at least two projections located with a difference in heights, wherein these projections include a long main tooth and short main teeth located on both sides of the long main tooth, and the long main tooth is curved from the middle part in both directions,forming a hooking portion, also, the anti-slip sole comprises a mating element built into the sole body, wherein the mating element has a mating groove corresponding to the connecting portion and an open hole communicating with the mating groove, the connecting portion includes a rod located at one end of the frame and a ball element located at the end of the rod, wherein the mating groove corresponds to the design of the ball element to provide a ball-and-socket rotary coupling, the open hole is located above the mating element and communicates with the mating groove, wherein the open hole extends to the side, and its width corresponds to the diameter of the rod, which is capable of partially entering the open hole to form an inclined state, and due to the joint action of the ball element and the mating groove, as well as the lateral guide limitation of the open hole relative to the rod,the frame rotates relative to the mating element and forms a stable temporary inclined fixed state, providing the possibility of rotary fixation of the anti-slip element between the working position and the hidden position, wherein the support projections are intended to maintain an operating gap between the friction part and the sole body when the anti-slip element is in the hidden position, also, a limiting zone is provided on the mating element, which, when the rotary element is rotated into a temporary inclined fixed state, limits the rotary element, controlling the angle of rotation of the rotary element less than 90°. In this case:

[0014] - the ratio of the rod diameter to the maximum outer diameter of the ball element is 1:2 to 1:3, and the surface roughness value Ra of the ball element is 0.4μm to 0.8μm;

[0015] - the ratio of the lateral expansion length of the open hole to the diameter of the rod is from 1:1.05 to 1:1.15;

[0016] - the surface of the friction part has an anti-slip relief, the depth of which is from 0.5 mm to 1.5 mm;

[0017] - the height of the support protrusions is from 1 mm to 2 mm, and the top of the support protrusions is provided with a rounded chamfer;

[0018] - There are several grooves on the frame, the area between adjacent anti-slip elements forms an elastic pliable section, and the connection area under the anti-slip element forms a rigid reinforcing section to improve the flexibility of the turning operation and structural strength;

[0019] - the mating element includes an elongated portion located on the outer side, wherein the upper surface of the elongated portion is a limiting portion, and the lower surface is an inclined guide portion, wherein an installation groove is made in the sole body opposite the mating element, and a lateral groove is made inside the installation groove opposite the elongated portion to ensure directional installation and fixation of the mating element;

[0020] - the ratio of the height of the long main tooth to the height of the short main tooth is from 1.5:1 to 2.5:1; the angle at the top of the long main tooth is from 30° to 60°; the center lines of the tops of the long main tooth and the short main teeth are inclined inward relative to the vertical plane of the frame at an angle of 16° to 25°, and microteeth with a depth of 0.8 mm to 1.2 mm are made on the edges of the protrusions;

[0021] - the first contact part is located at the top of the long main tooth, the second contact part is located at the top of the short main tooth, and the contact area of ​​the first contact part is 2-3 times larger than the contact area of ​​the second contact part;

[0022] - a metal plate is built inside the ball element, and several magnetic balls are built on the outer surface of the ball element, wherein one side of the magnetic balls inside is magnetically attracted to the metal plate, and the other side of the magnetic balls outside is in contact with the inside of the mating groove;

[0023] - the limiting zone includes a limiting plate protruding toward the open hole, and the limiting plate contacts the side surface of the rotated rod, controlling the rotation angle of the rod to be less than 90°;

[0024] - the limiting zone includes at least one limiting block located on the upper surface of the mating element, wherein the limiting block contacts the lower side of the rotated frame, controlling the angle of rotation of the rod less than 90°;

[0025] - the mating element also comprises at least one group of support rods located below, and a fixing part located under the support rods, wherein the lower surface of the fixing part has a convex arc-shaped structure, and the diameter of the fixing part is larger than the diameter of the support rod, while in the sole body opposite the fixing part and the support rod, a fixing groove is formed, into which the fixing part and the support rod are inserted for fixation;

[0026] - two groups of support rods, fixing parts and fixing grooves are provided under the mating element, and an elongated part is provided on the outer side surface of the mating element;

[0027] - the anti-slip element also includes a mounting portion for fastening to a frame, wherein the mounting portion is a number of through holes located under the anti-slip element, through which fixation is carried out by means of joint injection molding with the frame, both end ends of the anti-slip element protrude outward to form lateral projections that are embedded inside the frame and, together with the through holes, enhance the strength of the connection of the anti-slip element with the frame.

[0028] Positive effects

[0029] 1. The present invention relates to a composite anti-slip sole with a rotating and locking function, comprising a sole body and at least one group of rotating elements mounted so as to be rotatably on the sole body. The rotating element includes a frame and a connecting part located at one end of the frame. A plurality of anti-slip elements are mounted on one side surface of the frame, comprising at least two protrusions arranged with a height difference, to ensure anti-slip grip on the surface.Through the ball-and-socket connection of the connecting part with the mating element and the lateral guiding action of the open hole, the rotating element forms a stable temporary tilted fixed state during the switching process, which can effectively prevent the accidental overturning or loosening characteristic of existing rotating anti-skid soles with a simple axial pin or a one-way latch, improving the reliability of the anti-skid function when walking and providing the user with a stable grip on complex surfaces such as ice, snow, moss, grass, mud, sand and gravel.

[0030] 2. The edges of the frame are equipped with friction parts, supplemented with support protrusions, allowing the user to easily find the clearance for applying force to turn the gear in a hidden state. This solves the problem of finger slippage in cold or wet environments, as well as the problem of disappearing operating clearance after repeated switching, significantly reducing the force required for turning, improving the convenience of quick one-handed switching, and shortening the time for mode adjustment.

[0031] 3. The frame is provided with multiple grooves, forming a zonal structure with an elastic compliant section and a rigid reinforcing section. This makes the area between adjacent anti-skid elements bend easily during turning operation, and the load-bearing area of ​​the anti-skid teeth maintains high strength. This balances the contradiction between operational flexibility and operational rigidity, eliminating the problem of difficult turning or deformation under load, which is typical for existing technical solutions with uniform overall rigidity, prolonging the service life of the turning element and improving the overall deflection consistency of the sole.

[0032] 4. The mating element, through the inclined guide part and the limiting part of the extended part, combined with the guide fixing of the installation groove and the lateral groove, ensures the constant and reliable integration of the mating element into the sole body. This eliminates the problem of mating accuracy shift caused by temperature changes or stress during long-term use, guaranteeing the long-term accuracy of the ball joint connection and improving the durability and reliability of the entire anti-skid mechanism.

[0033] 5. The anti-skid element is designed with a long main tooth and short main teeth arranged at different heights, supplemented by a hook part and contact parts with different areas. Due to this, when contacting the surface, the long main tooth first breaks the ice crust and generates a lateral tearing force, and the short main teeth then fill the cracks, forming a multi-point joint grip, which greatly enhances the initial ice breaking ability and the stability of continuous grip on various snow and ice surfaces such as hard ice, smooth ice and loose snow, providing superior anti-skid performance compared with existing fixed or simple rotary studs.

[0034] 6. The sole body is equipped with multiple independent rotating elements distributed in the forefoot and heel areas. This allows the user to selectively extend some or all of the anti-slip elements according to the actual gait and surface conditions. This allows for flexible switching of the anti-slip function across the entire area, enhancing the adaptability of the sole to complex mixed surfaces while maintaining a smooth ride and comfort on ordinary surfaces, expanding the actual application scenarios of the sole.

[0035] 7. By limiting the height ratio of the long main tooth and the short main tooth, the tooth apex angle, and the inclination angle, the anti-skid element achieves a stepwise ice breaking effect upon contact with the surface. The long main tooth is responsible for primary breaking, while the short main teeth provide secondary grip. This significantly enhances the initial ice breaking performance and the stability of continuous grip on various snow and ice surfaces, such as hard ice, smooth ice, and loose snow. The mechanism for a stable temporary tilted fixed state, by lateral limiting the rod with an open hole in combination with a ball joint, solves the problem of unintentional reverse rotation during shifting, a problem common in the existing technology, improving the certainty and safety of mode shifting.

[0036] 8. By embedding a metal plate inside the ball joint and embedding magnetic balls on the outer surface, magnetic force is used to secure the magnetic balls in grooves on the ball joint surface without adhesive. This ensures that the magnetic balls do not loosen or fall out during prolonged rotation, eliminating the risk of loss associated with traditional adhesive mounting methods during prolonged rotation. During rotation, the magnetic balls form multi-point rolling contact with the inner wall of the mating groove. The magnetic force creates uniform micro-damping, providing the user with clear, step-by-step feedback, allowing for precise confirmation of the locked state. Furthermore, multi-point contact distributes concentrated stresses across individual magnetic balls, reducing localized wear and increasing the durability and reliability of the ball joint.Especially in the temporary tilted fixed state, the multi-point contact of magnetic balls effectively prevents structural fatigue caused by stress concentration at one point, ensuring the smoothness of the turning operation and the stability of the fixed state.

[0037] 9. By providing a limit zone on the mating element, the rotary element is effectively limited when it rotates into a temporary tilted fixed state, and the rotation angle of the rotary element is strictly controlled to be less than 90°. This prevents the rotary element from exceeding the specified trajectory or damaging the internal mating structure due to excessive rotation, ensures the angular consistency and safety of the temporary tilted fixed state, improves the certainty of mode switching, and eliminates the problems of unintentional reverse rotation or loosening caused by inaccurate angle control.

[0038] The ball-and-socket pivot lock and zonal rigidity / flexibility frame ensure reliable switching of the anti-slip element between the active and retracted positions. This significantly improves the sole's adaptability to challenging surfaces (ice, snow, moss, grass, mud, sand, gravel) and regular surfaces. This also ensures structural durability and ease of use over long periods of use. This overcomes the inherent problem of reduced strength due to insufficient stability and inconvenience of use, which is common with existing rotating anti-slip soles. This ensures reliable adjustment of the anti-slip mode without the need for additional tools. This increases user safety in snow and ice conditions and improves the user experience. Maintenance costs associated with excessive stud wear are also reduced.

[0039] Brief description of the drawings

[0040] The essence of the invention is explained by drawings, where:

[0041] Fig. 1 is a schematic structural diagram of a composite anti-skid sole with a rotating and locking function.

[0042] Fig. 2 is a schematic structural diagram of the front view of the rotary member.

[0043] Fig. 3 is a schematic structural diagram of the rear view of the rotary member.

[0044] Fig. 4 is a schematic volumetric structural diagram of the mating element.

[0045] Fig. 5 is an enlarged schematic structural diagram of region A in Fig. 1.

[0046] Fig. 6 is a schematic three-dimensional structural diagram of the anti-skid member.

[0047] Fig. 7 is an enlarged schematic structural diagram of region B in Fig. 1.

[0048] Fig. 8 is a diagram of the internal structure of a rotary member mold according to one embodiment of the present invention.

[0049] Fig. 9 is a diagram of the internal structure of a rotary member mold according to another embodiment of the present invention.

[0050] Fig. 10 is a diagram of the internal structure of a mating member mold according to one embodiment of the present invention.

[0051] Fig. 11 is a schematic diagram of a switching process of a rotary member according to another embodiment of the present invention.

[0052] Fig. 12 is a diagram of the internal structure of a mating member mold according to one embodiment of the present invention.

[0053] Fig. 13 is an enlarged side view of a restriction zone of a mating element according to one embodiment of the present invention.

[0054] Fig. 14 is an enlarged side view of a restriction zone of a mating member according to another embodiment of the present invention.

[0055] Fig. 15 is an enlarged side view of a first-angle inward tilt of a long main tooth and short main teeth according to one embodiment of the present invention.

[0056] Fig. 16 is an enlarged side view of the inward tilt at a second angle of a long main tooth and short main teeth according to one embodiment of the present invention.

[0057] Fig. 17 is an enlarged side view of a third angle inward tilt of a long main tooth and short main teeth according to one embodiment of the present invention.

[0058] Fig. 18 is a structural diagram of a first form of a mating element according to one embodiment of the present invention.

[0059] Fig. 19 is a structural diagram of a second form of a mating element according to one embodiment of the present invention.

[0060] Fig. 20 is a structural diagram of a third form of a mating element according to one embodiment of the present invention.

[0061] 1-Sole body; 2-Rotary member; 3-Mating member; 11-Mounting groove; 12-Side groove; 21-Carcass; 22-Connecting part; 23-Anti-slip member; 24-Friction part; 25-Support projection; 26-Groove; 27-Elastic compliant section; 28-Rigid reinforcing section; 29-Rear member; 31-Mating groove; 32-Open hole; 33-Extended part; 34-Support rod; 35-Locking part; 36-Locking groove; 221-Rod; 222-Ball member; 231-Long main tooth; 232-Short main tooth; 233-Engaging part; 234-First contact part; 235 - second contact part; 264 - through hole; 265 - side projection; 321 - limiting plate; 322 - limiting block; 323 - microteeth; 2221 - metal plate; 2222 - magnetic ball; 331 - limiting part; 332 - inclined guide part; 261 - third press mold; 262 - first press mold; 263 - second press mold.

[0062] Implementation of the invention

[0063] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or a hidden indication of the number of technical features specified. Thus, features defined by the terms "first" and "second" may explicitly or implicitly include one or more such features. In the description of the present invention, "plurality" means two or more, unless explicitly stated otherwise.

[0064] Implementation option 1

[0065] As shown in Fig. 1-10, the composite anti-slip sole with a rotating and locking function comprises a sole body 1 and at least one group of rotating elements 2 mounted with the possibility of rotation on the sole body 1.

[0066] The rotary member 2 includes a frame 21 and a connecting portion 22 located at one end of the frame 21. On one side surface of the frame 21, several anti-slip elements 23 are installed. The anti-slip element 23 comprises at least two protrusions located with a difference in height to provide anti-slip grip with the surface.

[0067] Also included is a mating element 3 built into the body of the sole 1. The mating element 3 has a mating groove 31 corresponding to the connecting part 22, and an open hole 32 communicating with the mating groove 31.

[0068] The connecting part 22 is capable of partially entering the open hole 32 to form an inclined state and, due to the joint action of the mating groove 31 and the ball element 222, ensures the rotation of the frame 21 relative to the mating element 3, which makes it possible to carry out the rotary fixation of the anti-slip element 23 between the working position and the hidden position.

[0069] It should be especially noted that the stable temporary inclined fixed state is achieved by specifically mating the rod 221 with the open hole 32. When the user rotates the frame 21, the rod 221 does not completely exit the mating member 3, but partially enters the lateral elongated portion of the open hole 32. Since the width of the open hole 32 corresponds to the diameter of the rod 221, namely, the diameter of the rod 221 exceeds the width of the open hole 32 by 0.1 mm ± 0.05 mm, the rod 221 is subject to the guide limitation of the side walls inside the open hole 32 and cannot arbitrarily move radially. In this case, the rod 221 forms an interference fit with the open hole 32.The mating element 3, in which the open hole 32 is made, is made of a plastic material having a certain elastic compliance, due to which the rod 221 during the insertion process enters into the open hole 32 due to the elastic expansion of the side walls, and the open hole 32 forms a lateral clamping limitation for the rod 221, thereby ensuring a stable inclined fixed state.

[0070] In this state, the ball member 222 is still located in the mating groove 31, providing a ball-and-socket joint support, and the rod 221 is fixed by the open hole 32 at a certain tilt angle, wherein the tilt angle is ≥30° and <90°. In this embodiment, an angle of 30° to 45° is particularly preferable. Unlike the conventional simple ball-and-socket joint rotation, the frame 21 in this tilted state is resistant to unintentional reverse rotation due to mutual friction. In this state, the user can confirm the rotation direction and then perform a 180° rotation on the spot, effectively preventing unintentional loosening caused by vibration during walking.

[0071] In this embodiment, two pivot members 2 are provided, respectively located in the forefoot region and the heel region of the sole. The pivot member 2 located in the heel region is a rear member 29. The rear member 29 has the same structure as the pivot member 2 installed in the forefoot region. The main difference is that the rear member 29 has only one groove 26. The design principle of both is the same, but the dimensions are different: the rear member 29 in the heel region is smaller than the pivot member 2 in the forefoot region.

[0072] As shown in Fig. 8 and Fig. 9, the turning member 2 located in the forefoot region is injection molded using the third mold 261. The rear member 29 located in the heel region is injection molded using the first mold 262. The mating member 3 is injection molded using the second mold 263.

[0073] In this embodiment, the sole body 1 is a sole main body made of ordinary rubber or a composite material. Mounting grooves 11 for fixing the mating member 3 are preliminarily formed at appropriate locations on the lower surface thereof. The mating member 3 is embedded in the mounting groove 11 by its outer extended portion 33, ensuring reliable installation. The upper surface of the extended portion 33 is a limiting portion 331, and the lower surface is an inclined guide portion 332, which interact with the lateral groove 12 inside the mounting groove 11, due to which, when the mating member 3 is installed from top to bottom, the inclined guide portion 332 performs a guiding function, and the limiting portion 331 ultimately performs restriction and fixation, ensuring that the mating member 3 does not loosen and does not fall out of the sole body 1.

[0074] The frame 21 of the rotary member 2 is a one-piece molded part, at one end of which the connecting portion 22 is integrated. The connecting portion 22 specifically includes a rod 221 and a ball member 222 at the end of the rod 221, forming a structure similar to a ball joint. The mating groove 31 of the mating member 3 is a spherical groove corresponding to the ball member 222. The open hole 32 is located above the mating member 3 and extends to the side, its width allows the rod 221 to pass through it and form an interference fit. The ratio of the diameter of the rod 221 to the maximum outer diameter of the ball member 222 is from 1:2 to 1:3. The surface roughness value Ra of the 222 ball element is from 0.4 μm to 0.8 μm.

[0075] The ratio of the lateral expansion length of the open hole 32 to the diameter of the rod 221 is from 1:1.05 to 1:1.15.

[0076] By limiting the ratio of the rod diameter to the maximum outside diameter of the ball element within the range of 1:2 to 1:3, while ensuring sufficient spherical contact area of ​​the ball element to distribute the stress during walking and prevent local crushing, at the same time ensuring the appropriate thinness of the rod to accurately match the guiding limitation of the open hole.

[0077] Combined with precision machining of the ball surface to a roughness of Ra 0.4 μm to 0.8 μm, on the one hand, it reduces friction during turning to ensure easy one-handed turning, and on the other hand, it prevents loss of locking feeling or excessive wear of the mating groove 31 due to an excessively smooth surface.

[0078] By further setting the ratio of the lateral expansion length of the open hole to the diameter of the rod 221 within the range of 1:1.05 to 1:1.15, this ensures sufficient guiding of the rod 221 when forming a temporary inclined fixed state, preventing unintentional falling out. This achieves smooth rotation, frictional stability of the temporary fixed state, and wear resistance during long-term use, effectively solving the technical problems of difficult rotation or unstable fixation characteristic of the existing technology.

[0079] When switching the anti-slip mode, the user slightly rotates the frame 21 with a finger or the toe of the shoe on the side opposite the anti-slip member 23, causing the ball member 222 of the connecting part 22 to slide along the mating groove 31, and the rod 221 partially enters the open hole 32, forming an inclined state that is temporarily fixed. The user can then rotate the frame 21 by 180° to transfer the anti-slip member 23 from the state hidden in the recess of the sole body 1 to the fully open working position. The reverse operation allows the anti-slip member 23 to be retracted.

[0080] This pivoting locking method based on a ball-and-socket joint, combined with the guiding action of the open hole 32, effectively solves the problem of unstable pivoting of the pivot element, which is characteristic of the existing technology. The large spherical fit of the ball element 222 to the mating groove 31 provides a multi-directional limiting force, and even with significant sole flexion or lateral impacts during walking, the frame 21 will not inadvertently tip over. At the same time, the lateral extension of the open hole 32 allows for easy one-handed pivoting without the need for special tools, significantly improving ease of use.

[0081] Compared to existing rotary designs with a simple axial hinge or a one-way latch, this solution offers a significant advantage in terms of locking reliability. Existing solutions based solely on a single-point latch or axial pin often result in latch wear or pin weakening due to long-term bending fatigue, which reduces structural strength. In this solution, however, the ball-and-socket connection between the ball element 222 and the mating groove 31 distributes stress uniformly across the entire spherical contact area, preventing localized stress concentration.

[0082] Furthermore, a plurality of grooves 26 formed on the frame 21 enable the formation of an elastic compliant portion 27 between adjacent anti-skid members 23, while the region under the anti-skid member 23 forms a rigid reinforcing portion 28, which further balances the flexibility of the turning operation and the structural rigidity in use, fundamentally eliminating the cause-and-effect chain problem of reduced strength due to insufficient stability, characteristic of the existing state of the art.

[0083] The anti-skid member 23 projections arranged with a height difference specifically include a long main tooth 231 and short main teeth 232 arranged on both sides of it. The long main tooth 231 is curved from the middle portion to both sides, forming a gripping portion 233. The contact area of ​​the first contact portion 234 at its top is larger than the contact area of ​​the second contact portion 235 at the top of the short main tooth 232. Due to this, when the sole contacts complex surfaces such as ice, snow, moss, grass, mud, sand and gravel, the long main tooth 231 first breaks the ice crust and provides primary traction, and the short main teeth 232 then fill the engagement space, forming a multi-point joint anti-skid effect, which significantly improves the traction stability on complex surfaces such as ice, snow, moss, grass, mud, sand and gravel.

[0084] The anti-slip member 23 is a metal insert. In this embodiment, 304 stainless steel is specifically used. In other embodiments, other metal materials may be used.

[0085] The friction portions 24 on the edges of both side surfaces of the frame 21 and the support projections 25 on the side opposite to the anti-slip member 23 further optimize the operating experience: the friction portions 24 increase the friction of the fingers when turning, preventing slipping; the support projections 25 prevent the friction portions 24 from completely adhering to the sole when the anti-slip member 23 is in the hidden position, providing sufficient operating clearance for the next turn.

[0086] Although the ball joint coupling provides a stable multi-directional limiting force, in the process of the actual turning operation, if the connecting portion 22 is a simple ball, the guiding ability of the rod 221 when inserted into the open hole 32 is insufficient, which may result in inaccurate angle control when the frame 21 is turned by the user, an insufficiently smooth turning process, and even temporary jamming of the ball member 222 due to an incorrect initial tilt angle.

[0087] The connecting portion 22 includes a rod 221 located at one end of the frame 21, and a ball member 222 located at the end of the rod 221. The mating groove 31 corresponds to the structure of the ball member 222 to provide a ball-and-socket rotary coupling.

[0088] The open hole 32 is located above the mating element 3 and communicates with the mating groove 31. The open hole 32 extends to the side, and its width corresponds to the diameter of the rod 221 to allow partial entry of the rod 221 to form an inclined fixed state.

[0089] During operation, the user rotates the frame 21, causing the ball element 222 to slide along the mating groove 31, and the rod 221 to enter the lateral extension of the open hole 32. Due to the precise width match, the rod 221 is guided by the side walls inside the open hole 32, forming a stable tilt angle of between 30° and 45°. This angle is convenient for the user to apply force to continue rotation and prevents the ball element 222 from accidentally falling out of the mating groove 31. The presence of the rod 221 significantly improves the directional accuracy at the initial stage of rotation, making the entire 180° rotation of the frame 21 smooth and controlled. Switching can be easily performed even on a wet sole or with one-handed operation.

[0090] The large spherical contact area of ​​ball element 222 with mating groove 31, combined with the guiding action of rod 221, forms a combined limiting mechanism that ensures a unique rotation path and repeatable accuracy. Compared to a simple ball joint, the likelihood of operating error is significantly reduced while maintaining high stability during walking.

[0091] Although the ball-and-socket joint provides a secure fit, when the user actually rotates the frame 21, if the edges of the frame 21 are smooth, fingers may slip. Especially in cold weather, when wearing gloves or with sweaty fingers, rotating becomes difficult, affecting the convenience of quickly switching the anti-slip mode.

[0092] Friction parts 24 are provided on the edges of both side surfaces of the frame 21. The friction parts 24 are designed to provide additional friction when turning the frame 21.

[0093] Friction parts 24 are surface reliefs located on the edges of both sides of frame 21, allowing the user to easily rotate the shoe from any direction. When shifting, the user presses or hooks their finger on friction part 24 to obtain sufficient traction, and with a gentle movement, tilts connecting part 22 to complete the rotation. The presence of friction parts 24 ensures reliable operation in a variety of environmental conditions. Even when the sole is dirty or the user's hands are wet, consistent force is maintained.

[0094] The combination of friction parts 24 with a ball-joint locking mechanism further improves the overall smoothness of operation and ergonomic performance, allowing the user to complete the extension or retraction of the anti-slip part 23 in seconds.

[0095] When the anti-slip element 23 is retracted, if the frame 21 is fully adjacent to the bottom surface of the sole body 1, the friction part 24 will be pressed, making it difficult for the user to find a gap to apply force during the next turn. This becomes especially difficult when dirt or ice and snow accumulate on the sole.

[0096] The frame 21 also comprises support projections 25 located on the side opposite the anti-slip element 23 and on both sides of the friction parts 24. The support projections 25 are designed to prevent the friction parts 24 from completely adhering to the body of the sole 1 in the hidden position.

[0097] The top of the support protrusions 25 is provided with a rounded chamfer. The smooth, rounded chamfer allows for pressure distribution.

[0098] The height of the support projections 25 is 1 to 2 mm. They are located at the edges of the friction portions 24. When the anti-slip member 23 is retracted, the support projections 25 contact the sole body 1, forming a minimal gap, thereby maintaining the friction portion 24 at a certain projection height. When next shifting, the user can easily insert a finger or toe into this gap and engage the friction portion 24 to rotate.

[0099] The presence of 25 support protrusions ensures the consistency of operation after repeated switching, and also prevents jamming due to dirt or ice chips entering the gap, maintaining comfortable use for a long time.

[0100] The frame 21 should have a certain amount of flexibility during turning to ensure easy shifting, but the anti-skid area 23 should maintain sufficient rigidity to withstand impacts on difficult surfaces such as ice, snow, moss, grass, mud, sand, and gravel. If the overall rigidity is uneven, turning will be difficult, and deformation may occur during use.

[0101] A plurality of grooves 26 are formed on the frame 21. The area between adjacent anti-slip members 23 forms an elastic compliant section 27, and the connection area under the anti-slip member 23 forms a rigid reinforcing section 28 to improve the flexibility of the turning operation and the structural strength.

[0102] The grooves 26 are preferably oblong or oval in shape and are located along the perimeter of the middle portion of the frame 21, thereby forming an elastic, flexible section 27 between adjacent anti-slip elements 23 that does not contain metal inserts. This section is thinner and lacks rigid reinforcement, facilitating bending deformation. Directly below the anti-slip element 23, the grooves 26 are absent, forming a rigid reinforcing section 28 made of solid material that provides high bending strength.

[0103] During operation, the user rotates the end of the frame 21. The elastic, flexible section 27 initially undergoes controlled flexion, reducing the required force and facilitating rotation. When the anti-skid element 23 extends outward and absorbs ground pressure, the rigid reinforcing section 28 effectively resists deformation, ensuring stable engagement of the long main tooth 231 and short main teeth 232 with the ice surface. The grooves 26 also reduce the overall weight and increase the softness of the sole, improving the flexural consistency with the sole body 1. This zonal rigidity / flexibility design balances the contradiction between ease of use and durability during use, significantly extending the service life of the rotating element 2.

[0104] Although the mating member 3 is mainly fixed by the extension portion 33, when the sole is injection molded or used for a long time, if the installation is based only on friction, it may become loose due to thermal expansion / contraction or stress, which will affect the mating accuracy of the connecting portion 22.

[0105] The mating element 3 includes an elongated portion 33 located on the outer side. The upper surface of the elongated portion 33 is a limiting portion 331, and the lower surface is an inclined guide portion 332. In the sole body 1 opposite the mating element 3, an installation groove 11 is formed, and inside the installation groove 11 opposite the elongated portion 33, a lateral groove 12 is formed to ensure directional installation and fixation of the mating element 3.

[0106] During assembly, the mating element 3 is inserted obliquely from above into the sole body 1. The inclined guide portion 332 first contacts the entrance of the lateral groove 12, providing smooth guidance. Then, the limiting portion 331 snaps into the upper portion of the lateral groove 12, providing double restraint in the axial and radial directions. After molding, the rubber material of the sole body 1 further envelops the extended portion 33, strengthening the fixation.

[0107] This design ensures the constant reliability of the mating element 3 inside the sole body 1. Even after repeated bending or temperature changes, the positional accuracy of the mating groove 31 and the open hole 32 does not shift, ensuring long-term reliable ball-and-socket connection of the connecting part 22.

[0108] Although the anti-skid member 23 already has projections arranged with height differences, when actually contacting complex surfaces such as ice, snow, moss, grass, mud, sand and gravel, if all the projections have the same height, the initial ice breaking ability is insufficient, which may result in slipping on hard ice.

[0109] The projections of the anti-skid member 23 include a long main tooth 231 and short main teeth 232 arranged on both sides of the long main tooth 231. The long main tooth 231 is curved from the middle portion to both sides, forming a catch portion 233.

[0110] The long main tooth 231 is preferably a metal insert longer than the short main teeth 232. It projects most strongly from the middle portion downwards, forming the first breakout point. The short main teeth 232 are arranged symmetrically on both sides, providing additional support. The curved design of the engaging portion 233 causes the long main tooth 231 to generate a transverse force component upon contact with the surface, enhancing the ice layer breaking effect.

[0111] When using, at the moment of contact of the forefoot or heel with the surface, the long main tooth 231 first penetrates the ice surface and widens the crack through the gripping part 233, then the short main teeth 232 follow it, filling the space, forming a multi-point stable grip, which greatly improves the anti-skid performance on smooth ice.

[0112] Although the long main tooth 231 already has a fairly strong ice breaking ability, if the contact area of ​​all tooth tips is the same, on loose snow or mixed surfaces, the grip distribution is uneven, which may lead to accelerated local wear.

[0113] At the top of the long main tooth 231, a first contact portion 234 is located, and at the top of the short main tooth 232, a second contact portion 235 is located. The contact area of ​​the first contact portion 234 is 2–3 times larger than the contact area of ​​the second contact portion 235.

[0114] The first contact portion 234 is preferably shaped like a platform or a slightly convex spherical surface. Its area is 2-3 times larger than that of the second contact portion 235. This ensures stress distribution when the long main tooth 231 absorbs the main pressure, reducing wear. The second contact portion 235 maintains a sharp conical shape, providing additional penetration. On complex surfaces such as ice, snow, moss, grass, mud, sand, and gravel, the long main tooth 231 first breaks the ice layer over a large area, then the short main teeth 232 precisely penetrate into the cracks, forming a stepped grip.

[0115] The design with different contact areas optimizes the balance of wear resistance and traction on different types of surfaces, allowing the 23 anti-skid element to maintain high performance on both hard ice and loose snow.

[0116] Although a single pivot element 2 can already provide local anti-slip reinforcement, under the uneven distribution of the load on the sole as a whole, switching at one point cannot meet the needs of the entire area, especially in scenarios where strong traction is required at the forefoot and heel at the same time.

[0117] The sole body 1 includes multiple installation locations of the rotary elements 2. The plurality of rotary elements 2 are distributed in the forefoot region and / or the heel region of the sole to provide selective switching of the anti-slip function over the entire region.

[0118] Preferred layout: one set of 2 rotating elements in the forefoot area and one set in the heel area, adjustable according to shoe size. Each rotating element is independently controlled. The user can selectively extend the 23 anti-slip elements in the forefoot or heel depending on the actual surface, or extend them all to combat extreme snow and ice conditions.

[0119] Multi-point distribution provides balanced outsole traction under various gaits while maintaining a smooth ride on ordinary surfaces, which greatly enhances the overall adaptability of the outsole.

[0120] By implementing the rotary fixation of the ball-joint type connecting part 22 with the mating element 3, a reliable and convenient switching of the anti-slip mode is ensured while taking into account the structural strength and operational flexibility, which fundamentally solves the chain technical problem of reducing strength due to unstable fixation and, ultimately, the unreliability of the anti-slip function, characteristic of the existing level of technology, providing the user with a composite anti-slip sole with the ability to freely switch between snow-ice and ordinary surfaces and high reliability.

[0121] Implementation option 2

[0122] As shown in Fig. 6, this embodiment is a further improvement based on Embodiment 1, aimed at solving the problem of the anti-slip member falling out during intensive use. By a specific process of joining by injection molding through through holes and embedding side projections, the local structural strength is strengthened. If the anti-slip member 23 and the frame 21 are fixed only with adhesive, they may fall out during intensive use. The anti-slip member 23 also includes a mounting portion for fixing to the frame 21. The mounting portion is a plurality of through holes 264 located under the anti-slip member 23. Fixation is achieved by joint injection molding with the frame 21 through the through holes 264.

[0123] Both end ends of the anti-slip member 23 protrude outward to form lateral projections 265. The lateral projections 265 are embedded inside the frame 21 and, together with the through holes 264, enhance the strength of the connection of the anti-slip member 23 with the frame 21.

[0124] During production, the anti-slip element 23 is first placed in a mold. After the mold is closed, injection molding is performed to form the frame 21. The through holes 264 of the anti-slip element 23 are filled with rubber or sole material and cured, forming a monolithic enveloping connection with the frame 21. During use, this injection molding method ensures a strong material connection between the anti-slip element 23 and the frame 21, which is not disrupted even under extreme bending or impact conditions. At the same time, the through holes 264 further reduce the weight of the frame 21 and enhance the overall strength of the connection with the sole, increasing the durability and comfort of the sole.

[0125] Implementation option 3

[0126] As shown in Fig. 12, this embodiment is a further improvement based on Embodiment 2, aimed at further optimizing the damping characteristics and the holding ability of the ball and socket joint rotational coupling. A metal plate 2221 is embedded inside the ball member 222, and a plurality of magnetic balls 2222 are embedded on the outer surface of the ball member 222. On the surface of the ball member 222, opposite the magnetic balls 2222, a plurality of internal recessed grooves are formed, in which the magnetic balls 2222 are located. One side of the magnetic balls 2222 inside is magnetically attracted to the metal plate 2221. By using magnetic force, the magnetic balls 2222 are fixed in the grooves on the surface of the ball member 222 without using glue, which ensures that the magnetic balls 2222 do not loosen and fall out during long-term rotation.The other side of the magnetic balls 2222 is in external contact with the internal part of the mating groove 31, providing uniform contact support during rotation.

[0127] Metal plate 2221 is made of iron-carbon alloy, and the magnetic force of magnetic balls 2222 ranges from 5 to 10 N. Magnetic balls 2222 are pressed into ball element 222 through internal recessed grooves. The groove depth is 1 / 2 the diameter of the magnetic ball. The attractive force between magnetic balls 2222 and metal plate 2221 is adjusted by adjusting the thickness of metal plate 2221 and is 8 N.

[0128] Especially when forming a temporary inclined fixed state, the multi-point contact interaction of the magnetic balls 2222 with the mating groove 31 can effectively distribute contact stress and, in combination with the magnetic properties of the magnetic balls 2222, achieve micro-damping, providing the user with a clear feeling of step-like fixation during the turning operation, which further enhances the reliability of the stable temporary inclined fixed state and the ease of operation.

[0129] By using magnetic attraction between the inner metal plate 2221 and the outer magnetic balls 2222, the magnetic balls 2222 are securely embedded without the use of adhesive, eliminating the risk of dislodgment associated with traditional adhesive mounting methods during prolonged rotation. During rotation, the magnetic balls 2222 form multi-point rolling contact with the inner wall of the mating groove. The magnetic force creates uniform micro-damping, providing the user with clear, step-by-step feedback to confirm a locked position.

[0130] Furthermore, the multi-point contact distributes concentrated stress across individual 2222 magnetic balls, reducing localized wear and improving the durability and reliability of the ball-and-socket joint. Particularly in the temporary tilted fixed state, the multi-point contact of the 2222 magnetic balls effectively prevents structural fatigue caused by stress concentration at a single point, ensuring smooth rotation and stable fixed state.

[0131] Implementation option 4

[0132] As shown in Fig. 13, this embodiment is a further improvement based on Embodiment 3. A limiting zone is provided on the mating member 3. When the rotary member 2 rotates to a temporary inclined fixed state, the limiting zone limits the rotary member 2, controlling the rotation angle of the rotary member 2 to less than 90°. The limiting block 322 located on the mating member 3 is not prone to destruction.

[0133] In this embodiment, the restriction zone includes a restriction plate 321 protruding toward the open hole 32. The restriction plate 321 contacts the side surface of the rotated rod 221, controlling the rotation angle of the rod 221 to be less than 90°.

[0134] By directly limiting the central rotating component—rod 221. Rod 221 is the connecting node between rotary element 2 and mating element 3, and its rotation angle directly determines the state of the rotary element. By providing a limiting plate 321 on mating element 3, protruding toward open hole 32, a physical barrier is formed near the axis of rotation.

[0135] The extended structure not only serves as a limiting function but also as a guide during the initial stage of rotation. When rod 221 enters open hole 32, the inclined surface guides the rod to smoothly enter a temporary inclined fixed position, reducing the feeling of sticking during operation.

[0136] By directly contacting the side surface of the rod 221, this design can more accurately control the angle of the rotation center, avoiding the angular errors caused by the deformation of the frame 21 itself, and ensuring the angular consistency of the temporary fixed state is strictly less than 90°.

[0137] By applying a limiting force directly to the rod, a direct impact of the frame 21 on the surface of the mating element 3 during the turning process is prevented, which helps to protect the integrity of the frame structure.

[0138] Implementation option 5

[0139] As shown in Fig. 14, this embodiment can alternatively replace embodiment 4 or be implemented together with it. The restriction zone includes at least one restriction block 322 located on the upper surface of the mating element 3. The restriction block 322 contacts the lower side of the rotated frame 21, controlling the rotation angle of the rod 221 to less than 90°. In this embodiment, four restriction blocks 322 are provided, two on each side in the form of a group. The restriction blocks 322 can also have other generally accepted geometric shapes, such as a strip. The restriction block 322 located on the mating element 3 is not prone to destruction.

[0140] Due to the limitation of the main design of the rotary element - frame 21. Unlike embodiment 4, this design does not contact directly with the small rod, but is carried out through the contact of the limiting blocks 322 on the upper surface of the mating element 3 with the lower side of the rotated frame 21.

[0141] Since the volume and strength of the frame 21 typically exceed those of the rod 221, the contact of the restraining blocks 322 with the frame allows for the absorption of greater impact loads. This restraining method is less susceptible to deformation during foot traffic or exposure to ground reaction, providing more reliable fixation.

[0142] The limiting blocks 322 are located on the upper surface of the mating member 3, which simplifies mold processing. The shape and number of the limiting blocks 322 can be adjusted according to the actual space, for example, two on each side, allowing for the spatial arrangement of soles of different sizes. Through multi-point distribution, the limiting blocks 322 provide a balanced support force, preventing the frame 21 from skewing during limiting, further enhancing the stability of the temporary fixed state.

[0143] Implementation option 6

[0144] This embodiment is a further optimization based on embodiment 5. In order to optimize the balance between the ice breaking effect and wear resistance, the height of the long main tooth 231 is 5 mm to 8 mm, the height of the short main tooth 232 is 2 mm to 4 mm, thereby maintaining the height ratio of the long main tooth 231 to the short main tooth 232 in the range of 1.5:1 to 2.5:1. The apex angle of the long main tooth 231 is preferably 30° to 60° to ensure sufficient penetration on hard ice without the tendency to chip.

[0145] Furthermore, the depth of the anti-slip relief on the surface of the friction portion 24 is preferably 0.5 mm to 1.5 mm to ensure sufficient turning force in wet conditions. The height of the support projections 25 is 1 mm to 2 mm. This height is sufficient to provide operating clearance when hidden, but does not cause a noticeable foreign body when the sole contacts the surface.

[0146] The 2222 magnetic ball joint structure has passed 100,000 rotation cycle tests, the stress concentration factor is reduced by 60% compared with the traditional ball joint.

[0147] The axial lines of the tops of the long main tooth 231 and the short main teeth 232 are inclined inward relative to the vertical plane of the frame 21 at an angle of 16° to 25°, and the depth of the microteeth 323 made on the edges of the projections is from 0.8 mm to 1.2 mm, while the microteeth 323 are made on the surface of both the long main tooth 231 and the short main teeth 232.

[0148] The geometric shape of the long 231 main tooth and short 232 main teeth is optimized based on biomimetics principles to adapt to low-friction surfaces such as snow and ice.

[0149] As shown in Fig. 15, in particular, the angle of inclination of the center lines of the tops of the long main tooth 231 and the short main teeth 232 inward relative to the vertical plane of the frame 21 is from 16° to 25°, preferably 20°. The depth of the microteeth 323 is from 0.8 mm to 1.2 mm, the width is from 2 mm to 3 mm.

[0150] The above geometric parameters, based on the shark tooth prototype, are aimed at solving the technical problems of existing anti-skid teeth, such as high resistance to ice penetration, tendency to slip and chipping of tooth tips.

[0151] Biomimetic Angle Limitation: The shark tooth angle of 15° to 25° balances hydrodynamics and compressive force. In this embodiment, this angle is converted into an ice spike angle of 16° to 25°, allowing the long main tooth 231 and short main teeth 232 to penetrate the ice body in the most efficient arc during kicking.

[0152] Implementation option 7

[0153] As shown in Fig. 16, this embodiment is an alternative embodiment 6. The inward inclination angle of the center lines of the tops of the long main tooth 231 and the short main teeth 232 relative to the vertical plane of the frame 21 is from 16° to 25°, preferably 16°.

[0154] If the angle is too small, less than 16°, approaching the vertical, although the initial penetration is facilitated, stress concentration will occur under the vertical load, which may cause cracking of the ice layer or slippage of the tooth tips.

[0155] Implementation option 8

[0156] As shown in Fig. 17, this embodiment is an alternative embodiment 6. The inward inclination angle of the center lines of the tops of the long main tooth 231 and the short main teeth 232 relative to the vertical plane of the frame 21 is from 16° to 25°, preferably 25°.

[0157] If the angle is too large, greater than 25°, a significant repulsive force is generated when kicking, increasing fatigue in the user's calf muscles. The angle range adopted in this embodiment provides an optimal balance between penetration resistance and load-bearing capacity, mimicking the economical squeezing mechanism of a shark during hunting by biomimetic limiting the depth of the microteeth. The microteeth on the edges of a shark's teeth effectively cut prey tissue. In this embodiment, by installing microteeth with a depth of 0.8 mm to 1.2 mm, microscopic grooves are formed in the ice. Particularly on fragile ice with air bubbles or hard blue ice, the microteeth are able to penetrate the irregular crystalline structure of the ice layer, providing additional microscopic anchor points, significantly increasing friction and preventing lateral sliding.This design overcomes the limitation of traditional smooth cutting edges, which tend to slip on hard ice.

[0158] Implementation option 9

[0159] As shown in Fig. 18, this embodiment is basically similar to embodiment 1, except that the elongated portion 33 of the mating member 3 in embodiment 1 is replaced. The mating member 3 also includes at least one group of support rods 34 located below and a fixing portion 35 located under the support rods 34. The lower surface of the fixing portion 35 has a convex arc-shaped structure, and the diameter of the fixing portion 35 is larger than the diameter of the support rod 34. In the sole body 1, opposite the fixing portion 35 and the support rod 34, a fixing groove 36 is formed. The fixing portion 35 and the support rod 34 are inserted into the fixing groove 36 for fixation.

[0160] The support rod 34 extends downward in a vertical direction. The fixing portion 35 has an inverted T-shaped or mushroom-shaped structure. The fixing groove 36 is located at the bottom of the mounting groove 11 of the sole body 1. Its internal shape corresponds to the fixing portion 35 and has a receiving space that narrows upward and widens downward.

[0161] Implementation option 10

[0162] As shown in Fig. 19, this embodiment is an alternative embodiment 9. The difference is that two groups of support rods 34, fixing parts 35 and fixing grooves 36 are provided under the mating element 3. Due to the two groups, the fixation strength is increased.

[0163] Implementation option 11

[0164] As shown in Fig. 20, this embodiment is basically similar to embodiment 10. The difference is that an elongated portion 33 is provided on the outer side surface of the mating element 3.

[0165] The extended portion 33 in this embodiment is similar to the extended portion 33 in Embodiment 5.

[0166] Due to the combined action of the extended portion 33 and the two groups of support rods 34 and fixing portions 35, the fixing force is significantly increased when installing the mating element 3.

[0167] The main purpose is to prevent the mating element from falling out. The original extended portion 33 mainly relied on the restriction of the limiting portion 331 with the upper edge of the mounting groove 11. However, under long-term high-frequency impact loads, the sole material may be subject to fatigue creep. By adding lower support rods 34 and locking portions 35, a bidirectional locking mechanism is formed from above and below. The large-diameter structure of the locking portion 35 snaps under the narrow entrance of the locking groove 36, using mechanical interference to prevent the mating element 3 from accidentally falling out in the vertical direction, thereby significantly improving the connection safety. In addition, the convex arc-shaped structure of the lower surface of the locking portion 35 acts as a guide cone for the auxiliary guide during installation.When the mating element 3 is installed, the arcuate surface guides the support rod 34 for smooth sliding into the entrance of the locking groove 36. Even if there are small deviations in position, automatic correction occurs, which reduces the complexity of assembly and increases production efficiency.

[0168] Shear resistance is simultaneously enhanced. Support rod 34 is recessed into the sole, and its interaction with locking groove 36 increases the contact depth of mating member 3 with the sole body 1. When pivot member 2 absorbs enormous shear forces transmitted from the ground, support rod 34 effectively distributes the load, preventing mating member 3 from tilting or loosening, ensuring the structural stability of the pivot mechanism under extreme driving conditions.

[0169] The implementation principle and the achieved technical effects of this embodiment are similar to those of Embodiment 1. For the sake of brevity of description, matters not mentioned in this embodiment may be discussed with reference to the corresponding content in Embodiment 1.

Claims

1. A composite anti-slip sole with a rotating and locking function, characterized in that it comprises a sole body and at least one group of rotating elements mounted with the possibility of rotation on the sole body, wherein the rotating element includes a frame and a connecting part located at one end of the frame, wherein several anti-slip elements are mounted on one side surface of the frame, and friction parts are formed on the edges of both side surfaces of the frame, wherein the frame also contains support projections located on the side opposite the anti-slip elements, and on both sides of the friction parts, wherein the anti-slip element contains at least two projections located with a difference in height, wherein these projections include a long main tooth and short main teeth located on both sides of the long main tooth, and the long main tooth is curved from the middle part in both directions, forming an engaging part,also, the anti-slip sole comprises a mating element built into the sole body, wherein the mating element has a mating groove corresponding to the connecting portion and an open opening communicating with the mating groove, the connecting portion includes a rod located at one end of the frame and a ball element located at the end of the rod, wherein the mating groove corresponds to the design of the ball element to provide a ball-and-socket rotary coupling, the open opening is located above the mating element and communicates with the mating groove, wherein the open opening extends to the side, and its width corresponds to the diameter of the rod, which is capable of partially entering the open opening to form an inclined state, and due to the joint action of the ball element and the mating groove, as well as the lateral guide limitation of the open opening relative to the rod,the frame rotates relative to the mating element and forms a stable temporary inclined fixed state, providing the possibility of rotary fixation of the anti-slip element between the working position and the hidden position, wherein the support projections are intended to maintain an operating gap between the friction part and the sole body when the anti-slip element is in the hidden position, also on the mating element a limiting zone is provided, which, when the rotary element is rotated into a temporary inclined fixed state, limits the rotary element, controlling the angle of rotation of the rotary element less than 90°.

2. An anti-slip sole according to claim 1, characterized in that the ratio of the diameter of the rod to the maximum outer diameter of the ball element is from 1:2 to 1:3, and the surface roughness value Ra of the ball element is from 0.4 μm to 0.8 μm.

3. An anti-slip sole according to paragraph 2, characterized in that the ratio of the length of the lateral expansion of the open hole to the diameter of the rod is from 1:1.05 to 1:1.

15.

4. An anti-slip sole according to paragraph 1, characterized in that an anti-slip relief is made on the surface of the friction part, the depth of which is from 0.5 to 1.5 mm.

5. An anti-slip sole according to paragraph 4, characterized in that the height of the support projections is from 1 to 2 mm, and the top of the support projections is provided with a rounded chamfer.

6. An anti-slip sole according to claim 1, characterized in that several grooves are made on the frame, the area between adjacent anti-slip elements forms an elastic, pliable section, and the connection area under the anti-slip element forms a rigid, reinforcing section to increase the flexibility of the turning operation and structural strength.

7. An anti-slip sole according to claim 1, characterized in that the mating element includes an elongated portion located on the outer side, wherein the upper surface of the elongated portion is a limiting portion, and the lower surface is an inclined guide portion, wherein an installation groove is made in the sole body opposite the mating element, and a lateral groove is made inside the installation groove opposite the elongated portion to ensure directional installation and fixation of the mating element.

8. An anti-slip sole according to claim 1, characterized in that the ratio of the height of the long main tooth to the height of the short main tooth is from 1.5:1 to 2.5:1; the angle at the top of the long main tooth is from 30° to 60°; the axial lines of the tops of the long main tooth and the short main teeth are inclined inward relative to the vertical plane of the frame at an angle of 16° to 25°, and microteeth with a depth of 0.8 to 1.2 mm are made on the edges of the projections.

9. An anti-slip sole according to claim 8, characterized in that a first contact part is located at the top of the long main tooth, a second contact part is located at the top of the short main tooth, and the contact area of ​​the first contact part exceeds the contact area of ​​the second contact part by 2-3 times.

10. An anti-slip sole according to claim 1, characterized in that a metal plate is built into the ball element, and several magnetic balls are built into the outer surface of the ball element, wherein one side of the magnetic balls inside is magnetically attracted to the metal plate, and the other side of the magnetic balls outside is in contact with the inner part of the mating groove.

11. An anti-slip sole according to claim 10, characterized in that the limiting zone includes a limiting plate protruding towards the open hole, wherein the limiting plate contacts the side surface of the rotated rod, controlling the angle of rotation of the rod to less than 90°.

12. An anti-slip sole according to claim 11, characterized in that the limiting zone includes at least one limiting block located on the upper surface of the mating element, wherein the limiting block contacts the lower side of the rotated frame, controlling the angle of rotation of the rod of less than 90°.

13. An anti-slip sole according to claim 11, characterized in that the mating element also contains at least one group of support rods located below, and a fixing part located under the support rods, wherein the lower surface of the fixing part has a convex arc-shaped structure, and the diameter of the fixing part is larger than the diameter of the support rod, while in the body of the sole opposite the fixing part and the support rod a fixing groove is made, into which the fixing part and the support rod are inserted for fixation.

14. An anti-slip sole according to paragraph 13, characterized in that two groups of support rods, fixing parts and fixing grooves are provided under the mating element, and an elongated part is provided on the outer side surface of the mating element.

15. An anti-slip sole according to claim 1, characterized in that the anti-slip element also includes a mounting portion for fastening to a frame, wherein the mounting portion is in the form of several through holes located under the anti-slip element, through which fixation is carried out by means of joint injection molding with the frame, both end ends of the anti-slip element protrude outward to form lateral projections that are embedded inside the frame and, together with the through holes, enhance the strength of the connection of the anti-slip element with the frame.

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