Anti-cracking multilayer sole structure

Abstract

The utility model relates to the technical field of footwear accessories, concretely relates to the multilayer type shoe sole structure of anti -cracking, including wear -resistant outsole pad, the edge and the forefoot bending area part of wear -resistant outsole pad are all provided with the anti -cracking reinforcing rib, the top of wear -resistant outsole pad is provided with the reinforcing pad, and the reinforcing pad includes the buffer midsole layer set up on the top of wear -resistant outsole pad, the elastic transition layer set up on the top of buffer midsole layer and the shoe insole layer set up on the top of elastic transition layer, and the stress dispersion boss is set up in buffer midsole layer to correspond with the heel landing impact area and the forefoot force point part, and the annular reinforcing ring is set up in elastic transition layer to correspond with the shoe sole forefoot bending line and heel part. The utility model has good anti -cracking effect, and it is beneficial to prolong the service life.

Description

Technical Field

[0001] This utility model relates to the field of footwear accessories technology, specifically to a multi-layered sole structure that prevents cracking. Background Technology

[0002] As the core functional component of a shoe, the sole directly bears the weight of the human body and absorbs the impact of walking and exercise. Its durability, crack resistance, and comfort directly determine the lifespan and wearing experience of the shoe. In daily wear, the sole needs to repeatedly withstand multiple effects such as forefoot bending, heel impact, and ground friction. In particular, the forefoot bending area, the edge area, and the heel impact area are key areas of stress concentration, which are prone to cracking and damage. At the same time, the differences in the pressure points of different foot shapes and the complex needs of sports scenarios place higher demands on the cushioning and dispersion, elasticity and adaptability of the sole.

[0003] Utility model patent CN213247219U discloses a crack-resistant sneaker sole, comprising a sole with a forefoot, a palm, and a heel fixedly arranged from left to right at the top. A first friction block is fixedly installed at the center of the top of the forefoot, and a second friction block is fixedly installed at the center of the top of the heel. Spikes are fixedly installed on the surfaces of both the first and second friction blocks. This utility model provides a crack-resistant sneaker sole that is not easily broken even with frequent contraction and tightening. Several bending strips effectively improve the toughness of the sole, further preventing breakage and making it more comfortable to wear. The friction blocks and trapezoidal blocks increase the friction between the sole and the ground. The wood pulp layer has high strength, provides good support, and has good water resistance, preventing delamination when wet. It is also wear-resistant and crack-resistant. The elastic particles in the carbon fiber layer enhance the tensile strength of several elastic carbon fibers.

[0004] While the aforementioned technical solutions offer advantages, most shoe soles currently on the market still have some shortcomings in use. For example, existing soles often use a single material or a simple composite structure, without specifically reinforcing stress-concentrated areas: the forefoot flexion zone is prone to fatigue cracking due to repeated bending; edges are easily damaged by impact and friction; and the heel impact zone is prone to localized cracking due to prolonged vertical impact. Although some soles incorporate reinforcement structures, these are often overall thickened designs, which not only affect the sole's flexibility and wearing comfort but also fail to accurately distribute stress in key areas, leaving the cracking problem unresolved and resulting in a generally short lifespan for the soles. Therefore, we propose a multi-layered, crack-resistant sole structure. Utility Model Content

[0005] The purpose of this invention is to provide a multi-layered sole structure that prevents cracking, thereby addressing the deficiencies mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The multi-layered outsole structure for crack prevention includes an abrasion-resistant outsole. Anti-crack reinforcing ribs are provided at the edges and forefoot flexion areas of the abrasion-resistant outsole. A reinforcement pad is provided on the top surface of the abrasion-resistant outsole. The reinforcement pad includes a buffering middle layer on the top surface of the abrasion-resistant outsole, an elastic transition layer on the top surface of the buffering middle layer, and a conforming insole layer on the top surface of the elastic transition layer. Stress-dispersing protrusions are provided in the buffering middle layer corresponding to the heel impact zone and the forefoot impact point. Annular reinforcing rings are provided in the elastic transition layer corresponding to the forefoot flexion line and the heel area of ​​the outsole.

[0007] Preferably, the bottom surface of the wear-resistant outsole is provided with multiple reinforcing anti-slip strips corresponding to the arch of the foot, and the bottom surface of the wear-resistant outsole is provided with multiple anti-slip protrusions corresponding to the forefoot and heel. This feature enhances the anti-slip properties of the bottom of the wear-resistant outer pad.

[0008] Preferably, the bottom surface of the wear-resistant outsole is also provided with a foot wear-resistant pad corresponding to the forefoot area, and a transition groove is provided between two adjacent reinforced anti-slip strips; This feature further enhances the anti-slip effect, and the transition groove can prevent cracking caused by stress concentration at the root of the groove when bending.

[0009] Preferably, a plurality of interlayer connecting columns are provided on the top surface of the wear-resistant outer bottom pad, and the top of the interlayer connecting columns extends into the bottom layer of the buffer. Preferably, a plurality of barbs are fixedly installed on the annular side of the interlayer connecting column, the barbs are located in the bottom layer of the buffer, and the barbs are set to be inclined downward at 45°~60°; The above two settings make it difficult for the layers to peel off, ensuring the integrity of the overall structure.

[0010] Preferably, a plurality of radial reinforcing patterns are integrally formed on the annular side of the stress-dispersing boss, and the radial reinforcing patterns are fixed in the bottom layer of the buffer. This feature further enhances crack resistance while dispersing localized impact stress.

[0011] Preferably, a polyester fiber mesh is provided inside the annular reinforcing ring, and the polyester fiber mesh is also fixedly installed in the elastic transition layer; This feature enhances the tear resistance of the elastic transition layer.

[0012] Preferably, a foot-fitting groove is provided on the top surface of the insole layer, and an edge-binding reinforcement layer is provided at the edge of the insole layer, which simultaneously wraps around the outer surface of the cushioning inner bottom layer and the elastic transition layer; This feature creates a seamless edge, preventing water ingress between layers and further enhancing crack resistance.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves targeted reinforcement of key stress concentration areas of the sole by setting anti-crack reinforcing ribs on the edge of the wear-resistant outsole and the forefoot bending area, annular reinforcing rings in the elastic transition layer corresponding to the forefoot bending line and the heel area, and an edge-wrapping reinforcement layer that fits the edge of the insole layer. The anti-crack reinforcing ribs prevent edge and forefoot bending cracks, the annular reinforcing rings enhance the tear resistance of the bending area and heel, and the edge-wrapping reinforcement layer wraps a multi-layer structure to prevent edge cracking, thus solving the problem of traditional soles lacking targeted reinforcement and being easily damaged.

[0014] 2. This utility model achieves the dispersion of force on the sole by setting stress-dispersing protrusions in the inner bottom layer of the buffer corresponding to the impact zone of the heel and the force point of the forefoot, and transition grooves on the bottom surface of the wear-resistant outsole. The stress-dispersing protrusions and radial reinforcing patterns quickly dissipate impact stress, and the transition grooves prevent stress concentration at the root of the pattern.

[0015] 3. This utility model achieves a stable connection of the multi-layer structure by setting interlayer connecting columns on the top surface of the wear-resistant outer bottom pad and wrapping the buffer middle bottom layer and elastic transition layer with an edge-wrapping reinforcement layer. The interlayer connecting columns and barbs prevent the layers from peeling off, and the edge-wrapping reinforcement layer enhances the overall sealing performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the stress-dispersing boss of this utility model; Figure 5 This is a cross-sectional view of the annular reinforcing ring of this utility model; The meanings of the labels in the diagram are as follows: 1. Wear-resistant outer sole pad; 10. Reinforced anti-slip strip; 101. Transition groove; 11. Anti-slip protrusion; 12. Crack-resistant reinforcing rib; 13. Foot abrasion-resistant pad; 14. Interlayer connecting column; 141. Barb; 2. Reinforcing pad; 20. Buffering bottom layer; 201. Stress dispersion boss; 202. Radial reinforcing pattern; 21. Elastic transition layer; 22. Circular reinforcing ring; 221. Polyester fiber mesh; 23. Fitting insole layer; 231. Foot-fitting groove; 232. Edge binding reinforcement layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-5 This utility model provides a technical solution: a multi-layered outsole structure for preventing cracking, including an abrasion-resistant outsole 1. The abrasion-resistant outsole 1 can be made of rubber composite material with a thickness of 3-5mm and has high abrasion resistance. Crack-resistant reinforcing ribs 12 are provided at the edges and the forefoot bending area of ​​the abrasion-resistant outsole 1. The crack-resistant reinforcing ribs 12 can be made of high-elasticity rubber material with an elastic modulus of 1MPa-1.2MPa to enhance the crack resistance of the edges and bending area. A reinforcing pad 2 is provided on the top surface of the abrasion-resistant outsole 1. The reinforcing pad 2 includes a buffer middle layer 20, an elastic transition layer 21, and an adhesive insole layer 23, all provided on the top surface of the abrasion-resistant outsole 1. The buffer middle layer 20 can be made of EVA foam material with a thickness of 8-12mm to bear impact cushioning. The buffer middle layer 20 has a honeycomb structure inside, with the honeycomb cavities distributed along the vertical sole to ensure cushioning while avoiding excessive material deformation that could lead to interlayer cracking. The inner bottom layer 20 of the cushioning system has stress-dispersing protrusions 201 corresponding to the heel impact zone and the forefoot impact point. The elastic transition layer 21 has annular reinforcing rings 22 corresponding to the forefoot bending line and the heel area. This allows the anti-crack reinforcing ribs 12 to strengthen the easily cracked parts of the wear-resistant outsole 1, the stress-dispersing protrusions 201 to divert impact stress, and the annular reinforcing rings 22 to enhance the tear resistance of the elastic transition layer 21, thus achieving multi-area protection of the sole and extending its service life.

[0019] It is worth noting that the elastic transition layer 21 can be made of TPU elastic film with a thickness of 1~1.5mm, which plays a role in interlayer flexible transition and crack resistance reinforcement. The upper and lower surfaces of the elastic transition layer 21 are coated with modified polyurethane adhesive, which is tightly bonded to the buffer bottom layer 20 and the insole layer 23. At the same time, the flexibility of the TPU film can absorb interlayer shear force and avoid bonding failure caused by temperature changes.

[0020] like Figure 1As shown, the bottom surface of the wear-resistant outsole 1 is provided with multiple reinforced anti-slip strips 10 corresponding to the arch of the foot, and the bottom surface of the wear-resistant outsole 1 is provided with multiple anti-slip protrusions 11 corresponding to the forefoot and heel. The reinforced anti-slip strips 10 increase the friction between the arch of the foot and the ground, and the anti-slip protrusions 11 enhance the anti-slip performance of the key stress areas of the forefoot and heel, preventing the sole of the shoe from slipping when walking or exercising.

[0021] like Figure 1 As shown, the bottom surface of the wear-resistant outsole 1 is also provided with a foot wear-resistant pad 13 corresponding to the forefoot area. A transition groove 101 is provided between each of the two adjacent reinforced anti-slip strips 10, so that the foot wear-resistant pad 13 can improve the wear resistance of the high-frequency friction area of ​​the forefoot and extend the service life of the forefoot of the sole. The transition groove 101 provides space for the sole to bend, so as to prevent cracking at the root of the tread of the reinforced anti-slip strip 10 due to stress concentration when bending, thus taking into account anti-slip, wear-resistant and crack-resistant performance and improving the practicality of the sole.

[0022] In this embodiment, a plurality of interlayer connecting posts 14 are provided on the top surface of the wear-resistant outer bottom pad 1. The top of the interlayer connecting post 14 extends into the buffer middle bottom layer 20, so that the interlayer connecting post 14 is inserted into the buffer middle bottom layer 20, thereby enhancing the connection strength between the wear-resistant outer bottom pad 1 and the buffer middle bottom layer 20 and preventing the two layers from peeling off during use.

[0023] Specifically, multiple barbs 141 are fixedly installed on the annular side of the interlayer connecting column 14. The barbs 141 are located inside the buffer bottom layer 20 and are set at a downward inclination of 45°~60°, so that the barbs 141 form a reverse engagement inside the buffer bottom layer 20, which further enhances the connection stability between the interlayer connecting column 14 and the buffer bottom layer 20, effectively resists the external force of interlayer separation, and ensures that the wear-resistant outer bottom pad 1 and the buffer bottom layer 20 are tightly connected for a long time without delamination problems.

[0024] Furthermore, multiple radial reinforcing patterns 202 are integrally formed on the annular side of the stress-dispersing boss 201. The radial reinforcing patterns 202 are fixed inside the buffer middle layer 20, so that the radial reinforcing patterns 202 diffuse outward from the stress-dispersing boss 201 as the center, and quickly transmit the concentrated impact stress to a larger area of ​​the buffer middle layer 20, so as to avoid excessive local stress causing the buffer middle layer 20 to crack. At the same time, it enhances the structural strength of the stress-dispersing boss 201 itself and improves the impact resistance and crack resistance of the buffer middle layer 20.

[0025] In addition, a polyester fiber mesh 221 is provided inside the annular reinforcing ring 22. The polyester fiber mesh 221 is also fixedly installed in the elastic transition layer 21, so that the polyester fiber mesh 221 enhances the tear resistance of the annular reinforcing ring 22 with its high strength and high toughness characteristics. At the same time, it is tightly combined with the elastic transition layer 21 to improve the structural stability of the elastic transition layer 21 corresponding to the forefoot bending line and the heel area.

[0026] It is worth noting that the insole layer 23 can be made of slow-rebound memory foam with a thickness of 5-7mm to improve wearing comfort. The top surface of the insole layer 23 is provided with a foot-fitting groove 231, and the edge of the insole layer 23 is provided with an edge-binding reinforcement layer 232. The edge-binding reinforcement layer 232 wraps around the outside of the cushioning inner layer 20 and the elastic transition layer 21. The edge-binding reinforcement layer 232 is formed by hot pressing to form an integral edge, so that the foot-fitting groove 231 conforms to the curvature of the foot, improving wearing comfort and reducing slippage between the foot and the insole layer. The edge-binding reinforcement layer 232 wraps around the edge of the multi-layer structure to prevent rainwater and dust from entering between the layers, avoid moisture and aging of the materials between the layers, and at the same time strengthen the edge crack resistance.

[0027] When using the crack-resistant multi-layer sole structure of this utility model, a wear-resistant outsole pad 1 is made of 3-5mm thick rubber composite material, and high-elasticity rubber anti-crack reinforcing ribs 12 are embedded in its edges and forefoot bending area; a reinforcing anti-slip strip 10 is provided at the arch of the foot on the bottom surface of the wear-resistant outsole pad 1, and anti-slip protrusions 11 are provided at the forefoot and heel; a foot wear-resistant pad 13 is added to the forefoot area, and a transition groove 101 is opened between adjacent reinforcing anti-slip strips 10; A layer connecting post 14 is provided on the top surface of the wear-resistant outsole 1. The cushioning middle layer 20 is fitted onto the layer connecting post 14, and the wear-resistant outsole 1 and the cushioning middle layer 20 are pressed and fixed together using adhesive or hot pressing. A 1-1.5mm thick TPU elastic transition layer 21 is attached to the top surface of the cushioning middle layer 20, and then a 5-7mm thick slow rebound memory foam insole layer 23 is attached. Through hot pressing, the edge-binding reinforcement layer 232 that fits the edge of the insole layer 23 is wrapped around the outside of the cushioning middle layer 20 and the elastic transition layer 21 to complete the sole assembly, ensuring a tight connection between the layers and no risk of peeling.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layered, crack-resistant sole structure, comprising a wear-resistant outsole pad (1), characterized in that: The wear-resistant outsole (1) is provided with anti-crack reinforcing ribs (12) at the edge and the forefoot bending area. The wear-resistant outsole (1) is provided with a reinforcing pad (2) on the top surface. The reinforcing pad (2) includes a buffer middle layer (20) on the top surface of the wear-resistant outsole (1), an elastic transition layer (21) on the top surface of the buffer middle layer (20), and an insole layer (23) on the top surface of the elastic transition layer (21). The buffer middle layer (20) is provided with stress-dispersing protrusions (201) corresponding to the heel impact area and the forefoot force point. The elastic transition layer (21) is provided with annular reinforcing rings (22) corresponding to the forefoot bending line and the heel area.

2. The multi-layered anti-cracking sole structure according to claim 1, characterized in that: The wear-resistant outsole pad (1) has multiple reinforcing anti-slip strips (10) on the bottom surface corresponding to the center of the foot, and multiple anti-slip protrusions (11) on the bottom surface corresponding to the forefoot and heel.

3. The multi-layered anti-cracking sole structure according to claim 2, characterized in that: The bottom surface of the wear-resistant outer sole pad (1) is also provided with a foot wear-resistant pad (13) corresponding to the forefoot area, and a transition groove (101) is provided between each of the two adjacent reinforced anti-slip strips (10).

4. The multi-layered anti-cracking sole structure according to claim 1, characterized in that: The wear-resistant outer bottom pad (1) has multiple interlayer connecting columns (14) on its top surface, and the top of the interlayer connecting columns (14) extends into the buffer middle bottom layer (20).

5. The multi-layered anti-cracking sole structure according to claim 4, characterized in that: Multiple barbs (141) are fixedly installed on the annular side of the interlayer connecting column (14). The barbs (141) are located in the bottom layer (20) of the buffer and are set at a downward inclination of 45°~60°.

6. The multi-layered anti-cracking sole structure according to claim 1, characterized in that: The stress-dispersing boss (201) has multiple radial reinforcing patterns (202) integrally formed on its annular side surface, and the radial reinforcing patterns (202) are fixed in the bottom layer (20) of the buffer.

7. The multi-layered anti-cracking sole structure according to claim 1, characterized in that: The annular reinforcing ring (22) is provided with a polyester fiber mesh (221) inside, and the polyester fiber mesh (221) is also fixedly installed in the elastic transition layer (21).

8. The multi-layered anti-cracking sole structure according to claim 1, characterized in that: The top surface of the insole layer (23) is provided with a foot-fitting groove (231), and the edge-binding reinforcement layer (232) is provided at the edge of the insole layer (23). The edge-binding reinforcement layer (232) simultaneously wraps around the outside of the buffer bottom layer (20) and the elastic transition layer (21).

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