Secondary molding EVA transparent sole with unique double-color structure

Abstract

The invention discloses a secondary forming EVA transparent shoe sole with a unique double-color structure, and belongs to the technical field of shoe soles, an upper layer structure and a lower layer structure are included, a connecting structure is arranged between the bottom of the upper layer structure and the lower layer structure, and the connecting structure comprises a hexagonal column fixed to the bottom of the upper layer structure and a hexagonal hole formed in the upper surface of the lower layer structure; the bottom end of the hexagonal column extends into the hexagonal hole, a transition connecting layer is arranged between the upper layer structure and the lower layer structure, the transition connecting layer is made of transparent adhesive, and the transition connecting layer is evenly distributed on the upper surface of the lower layer structure and the bottom of the upper layer structure. The double-color material is matched with the upper-layer wave-shaped lug boss and the lower-layer supporting unit, so that a double-color visual effect with high identification degree is formed; the hexagonal columns and the hexagonal holes are in tenon-and-mortise connection and are matched with the transition connecting layers, so that the connecting strength is enhanced, and layering is prevented; the functionality is high, the honeycomb structure of the supporting unit provides stable supporting, and foot fatigue is relieved.

Description

Technical Field

[0001] The present invention specifically relates to a secondary - formed EVA transparent sole with a unique two - color structure, belonging to the technical field of soles. Background Art

[0002] An EVA sole is made of ethylene - vinyl acetate copolymer as raw material, and has characteristics such as light weight, high elasticity, excellent cushioning, wear - resistance and impact - resistance, and is widely used in making the soles of sports shoes and casual shoes.

[0003] Currently, there are deficiencies in the structural design of EVA soles on the market. Ordinary two - color soles have a simple structure, and are only combined by conventional upper - lower layer or splicing methods, lacking uniqueness and functionality.

[0004] Although some soles have layers, the bonding between layers is not firm, and separation is likely to occur. Moreover, in meeting consumers' diverse requirements for the aesthetics, comfort and functionality of soles, the existing structural design is difficult to achieve a breakthrough. For example, common soles cannot balance good support with excellent flexibility while providing good support, and it is also difficult to present a novel and unique two - color effect in appearance to attract consumers.

[0005] Therefore, there is an urgent need to design a two - color EVA transparent sole with a brand - new structure. Summary of the Invention

[0006] The purpose of the present invention is to provide a secondary - formed EVA transparent sole with a unique two - color structure in view of the deficiencies of the prior art. Through innovative structural design, it can achieve a unique appearance of the sole, firm bonding between layers, and both good support and flexibility, meeting consumers' dual requirements for aesthetics and functionality.

[0007] A secondary - formed EVA transparent sole with a unique two - color structure includes an upper - layer structure and a lower - layer structure. A connection structure is provided between the bottom of the upper - layer structure and the lower - layer structure. The upper surface of the upper - layer structure is for contacting the sole of the foot, and the bottom of the lower - layer structure is for contacting the ground. The connection structure includes hexagonal columns fixed to the bottom of the upper - layer structure and hexagonal holes opened on the upper surface of the lower - layer structure. The bottom end of the hexagonal column extends into the hexagonal hole, and a transition connection layer is provided between the upper - layer structure and the lower - layer structure.

[0008] The material of the transition connection layer is a transparent adhesive, and it is evenly distributed on the upper surface of the lower - layer structure and the bottom of the upper - layer structure.

[0009] The transparent adhesive is a polyurethane adhesive. The thickness of the transition connection layer is 0.5 - 1 mm. Before secondary molding, the transparent adhesive is applied, and then the upper structure and the lower structure are tenon-mortise inserted and subjected to a hot pressing process. The transition connection layer can further enhance the bonding force between the two EVA materials, and at the same time buffer the stress concentration caused by the performance differences of the two materials to a certain extent, improving the reliability and durability of the sole structure.

[0010] A support unit is fixed to the bottom of the lower structure. The support unit is hexagonal and is correspondingly arranged below the hexagonal hole. The side length of the support unit is 8 - 10 mm, and the height is 6 - 8 mm. Both the hexagonal column and the support unit are regular hexagons. Multiple support units together form a honeycomb structure. This honeycomb structure has excellent mechanical properties, can evenly disperse the pressure from the ground, provide strong support for the sole, and effectively prevent the sole from deforming during long-term use.

[0011] An accommodation groove is provided in the support unit. The bottom of the hexagonal column extends into the accommodation groove, and there is a space between the bottom of the hexagonal column and the bottom of the accommodation groove. The cavity inside the honeycomb structure can also play a buffering role, absorbing the impact force generated during walking and further improving the wearing comfort.

[0012] A cross groove is provided at the bottom of the support unit. The depth of the cross groove is 1 - 2 mm, which increases the friction between the sole and the ground. The cross groove improves the anti-slip performance of the sole, especially suitable for complex ground environments such as wet and smooth surfaces, ensuring walking safety.

[0013] A convex part is fixed to the upper surface of the upper structure. The convex part is a wavy convexity. The two ends of the convex part are close to both sides of the upper structure. The convex parts are regularly arranged in sequence from the front sole to the heel. The height of the convex part is 3 - 5 mm, the width is 5 - 8 mm, and the spacing between adjacent convex parts is 2 - 3 mm. This can increase the friction between the sole of the foot and the sole, effectively prevent the sole of the foot from sliding during walking, and during walking, the wavy convexity can elastically deform with the change of the pressure on the sole of the foot, providing a dynamic massage effect and enhancing the wearing comfort.

[0014] An air guide groove running through the front and back of the foot is provided on the upper surface of the upper structure. The opening track of the air guide groove is wavy. The width of the air guide groove is 1 - 2 mm, and the depth is 2 - 3 mm. This can promote air circulation during walking, timely discharge the heat and moisture generated by the sole of the foot, keep the sole of the foot dry, and improve the wearing comfort; at the same time, the existence of the air guide groove can also reduce the weight of the sole to a certain extent, making the sole lighter and more flexible.

[0015] The technical effects and advantages of the present invention: 1. Unique appearance: The wavy convex part of the upper structure and the supporting unit of the lower layer form a unique structural feature. After using materials of different colors, the unique two-color visual effect formed by their combination gives the sole extremely high recognition in appearance, meeting consumers' pursuit of fashion and personalization.

[0016] 2. Firm combination: The hexagonal columns are combined through the mortise and tenon connection structure and the hexagonal holes, and with the design of the transition connection layer, the connection strength between the upper and lower layers of EVA materials is greatly enhanced, effectively preventing the sole from delaminating and extending the service life of the sole.

[0017] 3. Strong functionality: Supportiveness: The supporting units form a honeycomb structure, which can evenly disperse pressure, provide stable and strong support for the sole of the foot, effectively relieve foot fatigue, and is suitable for long walks and sports.

[0018] Flexibility: The wavy convex design makes the upper layer have good flexibility, can flexibly deform with the movements of the sole of the foot, and provides a comfortable wearing experience.

[0019] Anti-slip property: The cross grooves on the lower layer significantly improve the anti-slip performance of the sole, reduce the risk of slipping, and ensure walking safety.

[0020] Air permeability: The air guide groove design promotes air circulation, keeps the sole of the foot dry, and improves the wearing comfort. Description of the drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a connection structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the accommodation groove of the present invention; Figure 4 is a cross-sectional structural schematic diagram of the present invention; Figure 5 is Figure 4 an enlarged structural schematic diagram of part A in

[0022] In the figure: 1. Upper structure; 101. Convex part; 102. Air guide groove; 2. Lower structure; 3. Connection structure; 301. Hexagonal column; 302. Hexagonal hole; 303. Transition connection layer; 4. Supporting unit; 401. Accommodation groove; 402. Cross groove. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-5 as shown in Embodiment 1

[0025] A secondary-molded EVA transparent sole with a unique two-color structure includes an upper structure 1 and a lower structure 2. A connecting structure 3 is provided between the bottom of the upper structure 1 and the lower structure 2. The upper surface of the upper structure 1 is for contacting the sole of the foot, and the bottom of the lower structure 2 is for contacting the ground. The connecting structure 3 includes a hexagonal column 301 fixed to the bottom of the upper structure 1 and a hexagonal hole 302 opened on the upper surface of the lower structure 2. The bottom end of the hexagonal column 301 extends into the hexagonal hole 302, and a transition connecting layer 303 is provided between the upper structure 1 and the lower structure 2.

[0026] The material used for the transition connecting layer 303 is a transparent adhesive, and it is evenly distributed on the upper surface of the lower structure 2 and the bottom of the upper structure 1.

[0027] The transparent adhesive is a polyurethane adhesive. The thickness of the transition connecting layer 303 is 0.5 mm. Before secondary molding, the transparent adhesive is applied, and then the upper structure 1 and the lower structure 2 are tenon-and-mortise inserted and hot-pressed. The transition connecting layer 303 can further enhance the bonding force between the two layers of EVA materials, and at the same time buffer the stress concentration caused by the performance differences of the two layers of materials to a certain extent, improving the reliability and durability of the sole structure.

[0028] A support unit 4 is fixed to the bottom of the lower structure 2. The support unit 4 is hexagonal and is correspondingly arranged below the hexagonal hole 302. The side length of the support unit 4 is 8 mm and the height is 6 mm. Both the hexagonal column 301 and the support unit 4 are regular hexagons. Multiple support units 4 together form a honeycomb structure. This honeycomb structure has excellent mechanical properties, can evenly disperse the pressure from the ground, provide strong support for the sole, and effectively prevent the sole from deforming during long-term use.

[0029] An accommodation groove 401 is provided in the support unit 4. The bottom of the hexagonal column 301 extends into the accommodation groove 401, and there is a space between the bottom of the hexagonal column 301 and the bottom of the accommodation groove 401. The cavity inside the honeycomb structure can also play a buffering role, absorbing the impact force generated during walking and further improving the wearing comfort.

[0030] The bottom of the support unit 4 is provided with a cross groove 402. The depth of the cross groove 402 is 1 millimeter, which increases the friction between the sole and the ground. The cross groove 402 improves the anti-slip performance of the sole, especially suitable for complex ground environments such as wet and smooth surfaces, ensuring walking safety.

[0031] The upper surface of the upper structure 1 is fixed with a convex part 101. The convex part 101 is a wavy convex. The two ends of the convex part 101 are close to both sides of the upper structure 1. The convex part 101 is regularly arranged in sequence from the front sole to the heel. The height of the convex part 101 is 3 millimeters, the width is 5 millimeters, and the spacing between adjacent convex parts 101 is 2 millimeters. This can increase the friction between the sole of the foot and the sole of the shoe, effectively prevent the sole of the foot from sliding when walking, and during the walking process, the wavy convex can undergo elastic deformation with the change of the pressure of the sole of the foot, providing a dynamic massage effect and enhancing the wearing comfort.

[0032] The upper surface of the upper structure 1 is provided with an air guide groove 102 running through the front and back of the foot. The opening track of the air guide groove 102 is wavy. The width of the air guide groove 102 is 1 millimeter and the depth is 2 millimeters. This can promote air circulation when walking, timely discharge the heat and moisture generated by the sole of the foot, keep the sole of the foot dry, and improve the wearing comfort; at the same time, the existence of the air guide groove 102 can also reduce the weight of the sole to a certain extent, making the sole more lightweight and flexible.

[0033] The secondary-molded EVA transparent sole with a unique two-color structure of the present invention shows significant advantages in terms of appearance, structural connection, functionality, etc. through unique structural design and material selection.

[0034] The wavy convex part of the upper structure and the lower support unit are matched to form a unique two-color visual effect, meeting the pursuit of consumers for fashion and personalization; the mortise and tenon connection of the hexagonal column and the hexagonal hole and the design of the transition connection layer enhance the connection strength of the upper and lower layer materials and extend the service life of the sole; the honeycomb-shaped support unit, cross groove, wavy convex and air guide groove and other designs endow the sole with good support, anti-slip, flexibility and breathability respectively, improving the wearing comfort and safety. Example 2

[0035] The secondary-molded EVA transparent sole with a unique two-color structure includes an upper structure 1 and a lower structure 2. A connection structure 3 is provided between the bottom of the upper structure 1 and the lower structure 2. The upper surface of the upper structure 1 is for contacting the sole of the foot, and the bottom of the lower structure 2 is for contacting the ground. The connection structure 3 includes a hexagonal column 301 fixed to the bottom of the upper structure 1 and a hexagonal hole 302 opened on the upper surface of the lower structure 2. The bottom end of the hexagonal column 301 extends into the hexagonal hole 302, and a transition connection layer 303 is provided between the upper structure 1 and the lower structure 2.

[0036] The material used for the transition connection layer 303 is a transparent adhesive, which is evenly distributed on the upper surface of the lower structure 2 and the bottom of the upper structure 1.

[0037] The transparent adhesive is a polyurethane adhesive. The thickness of the transition connection layer 303 is 0.8 mm. Before secondary molding, the transparent adhesive is applied, and then the upper structure 1 and the lower structure 2 are tenon-mortise inserted and hot-pressed. The transition connection layer 303 can further enhance the bonding force between the two EVA materials, and at the same time buffer the stress concentration caused by the performance differences of the two materials to a certain extent, improving the reliability and durability of the sole structure.

[0038] A support unit 4 is fixed to the bottom of the lower structure 2. The support unit 4 is hexagonal and is correspondingly arranged below the hexagonal hole 302. The side length of the support unit 4 is 9 mm and the height is 7 mm. Both the hexagonal column 301 and the support unit 4 are regular hexagons. Multiple support units 4 together form a honeycomb structure. This honeycomb structure has excellent mechanical properties, can evenly disperse the pressure from the ground, provide strong support for the sole, and effectively prevent the sole from deforming during long-term use.

[0039] A receiving groove 401 is provided in the support unit 4. The bottom of the hexagonal column 301 extends into the receiving groove 401, and there is a space between the bottom of the hexagonal column 301 and the bottom of the receiving groove 401. The cavity inside the honeycomb structure can also play a buffering role, absorbing the impact force generated during walking and further improving the wearing comfort.

[0040] A cross groove 402 is opened at the bottom of the support unit 4. The depth of the cross groove 402 is 1.5 mm, which increases the friction between the sole and the ground. The cross groove 402 improves the anti-slip performance of the sole, especially suitable for complex ground environments such as wet and smooth surfaces, ensuring walking safety.

[0041] A convex portion 101 is fixed to the upper surface of the upper structure 1. The convex portion 101 is a wavy convexity. The two ends of the convex portion 101 are close to both sides of the upper structure 1. The convex portion 101 is regularly arranged in sequence from the forefoot to the heel. The height of the convex portion 101 is 4 mm and the width is 6.5 mm. The spacing between adjacent convex portions 101 is 2.5 mm. This can increase the friction between the sole of the foot and the sole, effectively prevent the sole of the foot from slipping during walking, and during walking, the wavy convexity can undergo elastic deformation with the change of the pressure on the sole of the foot, providing a dynamic massage effect and enhancing the wearing comfort.

[0042] The upper surface of the upper structure 1 is provided with an air guide groove 102 that runs through the front and back of the foot. The opening trajectory of the air guide groove 102 is wavy. The width of the air guide groove 102 is 1.5 millimeters and the depth is 2.5 millimeters. This can promote air circulation when walking, timely discharge the heat and moisture generated by the sole, keep the sole dry, and improve the wearing comfort. At the same time, the existence of the air guide groove 102 can also reduce the weight of the sole to a certain extent, making the sole more lightweight and flexible. Embodiment 3

[0043] The secondary-molded EVA transparent sole with a unique two-color structure includes an upper structure 1 and a lower structure 2. A connecting structure 3 is provided between the bottom of the upper structure 1 and the lower structure 2. The upper surface of the upper structure 1 is for contacting the sole of the foot, and the bottom of the lower structure 2 is for contacting the ground. The connecting structure 3 includes a hexagonal column 301 fixed to the bottom of the upper structure 1 and a hexagonal hole 302 opened on the upper surface of the lower structure 2. The bottom end of the hexagonal column 301 extends into the hexagonal hole 302, and a transition connection layer 303 is provided between the upper structure 1 and the lower structure 2.

[0044] The material used for the transition connection layer 303 is a transparent adhesive, and it is evenly distributed on the upper surface of the lower structure 2 and the bottom of the upper structure 1.

[0045] The transparent adhesive is a polyurethane adhesive. The thickness of the transition connection layer 303 is 1 millimeter. Before secondary molding, the transparent adhesive is applied, and then the upper structure 1 and the lower structure 2 are tenoned and inserted, as well as a hot pressing process. The transition connection layer 303 can further enhance the bonding force between the two layers of EVA materials, and at the same time buffer the stress concentration caused by the performance differences of the two layers of materials to a certain extent, improving the reliability and durability of the sole structure.

[0046] A support unit 4 is fixed to the bottom of the lower structure 2. The support unit 4 is hexagonal and is correspondingly arranged below the hexagonal hole 302. The side length of the support unit 4 is 10 millimeters and the height is 8 millimeters. Both the hexagonal column 301 and the support unit 4 are regular hexagons. Multiple support units 4 together form a honeycomb structure. This honeycomb structure has excellent mechanical properties, can evenly disperse the pressure from the ground, provide strong support for the sole, and effectively prevent the sole from deforming during long-term use.

[0047] An accommodation groove 401 is provided in the support unit 4. The bottom of the hexagonal column 301 extends into the accommodation groove 401, and there is a space between the bottom of the hexagonal column 301 and the bottom of the accommodation groove 401. The cavity inside the honeycomb structure can also play a buffering role, absorbing the impact force generated when walking, and further improving the wearing comfort.

[0048] The bottom of the support unit 4 is provided with a cross groove 402, and the depth of the cross groove 402 is 2 millimeters, which increases the friction between the sole and the ground. The cross groove 402 improves the anti-slip performance of the sole, especially suitable for complex ground environments such as wet and smooth surfaces, ensuring walking safety.

[0049] The upper surface of the upper structure 1 is fixed with a convex part 101. The convex part 101 is a wavy convexity. The two ends of the convex part 101 are close to both sides of the upper structure 1. The convex part 101 is regularly arranged in sequence from the front sole to the heel. The height of the convex part 101 is 5 millimeters, and the width is 8 millimeters. The distance between adjacent convex parts 101 is 3 millimeters. This can increase the friction between the sole of the foot and the sole of the shoe, effectively prevent the sole of the foot from sliding when walking, and during walking, the wavy convexity can undergo elastic deformation with the change of the pressure on the sole of the foot, providing a dynamic massage effect and enhancing the wearing comfort.

[0050] The upper surface of the upper structure 1 is provided with an air guide groove 102 that runs through the front and back of the foot. The opening track of the air guide groove 102 is wavy. The width of the air guide groove 102 is 2 millimeters, and the depth is 3 millimeters. This can promote air circulation when walking, timely discharge the heat and moisture generated by the sole of the foot, keep the sole of the foot dry, and improve the wearing comfort; at the same time, the existence of the air guide groove 102 can also reduce the weight of the sole to a certain extent, making the sole more lightweight and flexible. Embodiment 4

[0051] This embodiment proposes another implementation manner of the convex part 101 on the basis of Embodiment 1. The upper surface of the convex part 101 is an arc-shaped top, and the air guide groove 102 is located below the convex part 101, which can ensure the complete penetration of the air guide groove 102. Embodiment 5

[0052] This embodiment proposes another combination manner of the convex part 101 and the air guide groove 102 on the basis of Embodiment 4. The convex part 101 is provided with a notch at the position of the air guide groove 102, and the upper surface of the convex part 101 is a plane, which can avoid a foreign body sensation on the foot.

[0053] Embodiment 4 and Embodiment 5 innovate the combination manner of the convex part and the air guide groove, and further optimize the use experience of the sole.

[0054] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0055] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A secondary-molded EVA transparent sole with a unique two-color structure, comprising an upper structure (1) and a lower structure (2), characterized in that: A connection structure (3) is provided between the bottom of the upper structure (1) and the lower structure (2). The connection structure (3) includes a hexagonal column (301) fixed to the bottom of the upper structure (1) and a hexagonal hole (302) formed in the upper surface of the lower structure (2). The bottom end of the hexagonal column (301) extends into the hexagonal hole (302), and a transition connection layer (303) is provided between the upper structure (1) and the lower structure (2).

2. The secondary-molded EVA transparent sole with a unique two-color structure as claimed in claim 1, wherein: The material of the transition connection layer (303) is a transparent adhesive, which is evenly distributed on the upper surface of the lower structure (2) and the bottom of the upper structure (1).

3. The secondary-formed EVA transparent sole with a unique two-color structure according to claim 2, characterized in that: The transparent adhesive is a polyurethane adhesive.

4. The secondary-formed EVA transparent sole with a unique two-color structure as claimed in claim 1, wherein: A support unit (4) is fixed to the bottom of the lower structure (2). The support unit (4) is hexagonal and is correspondingly arranged below the hexagonal hole (302).

5. The secondary-formed EVA transparent sole with a unique two-color structure as claimed in claim 4, wherein: A receiving groove (401) is provided in the support unit (4). The bottom of the hexagonal column (301) extends into the receiving groove (401), and there is a space between the bottom of the hexagonal column (301) and the bottom of the receiving groove (401).

6. The secondary-molded EVA transparent sole with a unique two-color structure as described in claim 5, characterized in that: A cross groove (402) is formed in the bottom of the support unit (4).

7. The secondary-molded EVA transparent sole with a unique two-color structure as described in claim 1, characterized in that: A raised portion (101) is fixed to the upper surface of the upper structure (1). The raised portion (101) is a wavy protrusion. The two ends of the raised portion (101) are close to both sides of the upper structure (1), and the raised portion (101) is regularly arranged in sequence from the forefoot to the heel.

8. The secondary-molded EVA transparent sole with a unique two-color structure according to claim 7, characterized in that: An air guide groove (102) penetrating through the front and back of the foot is provided on the upper surface of the upper structure (1). The opening track of the air guide groove (102) is wavy.

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