Dual durometer encapsulated upper for a shoe heel

Abstract

The utility model provides a kind of double hardness rubber-coated leather for shoe heel, including the rigid support of inner layer and the soft elastomer of outer layer, the bottom surface of rigid support has several through holes, the through hole of the through hole located rigid support front one end surface is larger than the through hole aperture of another end surface, the through hole is step hole, the edge portion of rigid support front is concave downward, form lower step, the soft elastomer covers the bottom surface of rigid support, side wall and lower step and is inserted occlusion into integral type structure, this leather structure stability is strong, effectively reduce the risk of falling of soft and hard part, especially suitable for high transparency shoe heel and crystal shoe.

Description

Technical Field

[0001] This utility model relates to the field of shoe material accessories, and in particular to a dual-hardness coated heel cover for shoe heels. Background Technology

[0002] The heel is one of the main stress points on the sole of a shoe, and it is also the part that wears out quickly during walking, playing a crucial role in wearing comfort. Therefore, existing plastic heels, especially women's shoes, often feature an auxiliary component called a toplift or toppiece that contacts the ground on the main body of the heel. Currently, most shoe heel tops are made of high-hardness rubber or high-hardness elastomer materials, which cannot simultaneously achieve core dynamic mechanical properties such as anti-slip, shock absorption, sound insulation, and high wear resistance, as well as appearance and optical effects. This makes it difficult to meet the consumer market's dual demands for high performance and high aesthetics in shoe materials and accessories. Furthermore, existing double-hardness coated top sheets (such as those published in CN119423451B) suffer from the technical defect of interlayer separation, resulting in insufficient bonding strength between the rigid support and the soft elastomer. Additionally, their compatibility with high-transparency heels and crystal shoes is poor—the rigid support has a double-layered serrated edge, which easily creates visual defects when the soft elastomer is made of transparent material, compromising the optical aesthetics of the transparent component. This utility model, through an innovative integrated structural design, achieves a dual improvement in both the structural strength and optical aesthetics of the transparent top sheet. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a dual-hardness coated top cover for shoe heels.

[0004] The bottom surface of the rigid support has several through holes. The diameter of the through hole on one end surface of the front of the rigid support is larger than the diameter of the through hole on the other end surface. The through hole is a stepped hole. The front edge of the rigid support is recessed inward to form a lower step; The soft elastomer covers the bottom surface, side walls, and lower step of the rigid support and interlocks to form an integrated structure. The beneficial effects of this utility model are as follows: This utility model provides a dual-hardness coated top cover for shoe heels. By optimizing the structural design of the hard support body, the bonding strength between the hard support body and the soft elastomer is enhanced, effectively reducing the risk of detachment and improving the aesthetics of the transparent top cover.

[0005] This utility model also features a simple structure, convenient processing and easy assembly, making it highly practical. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the front structure of the rigid support body of this utility model; Figure 4 This is a schematic diagram of the bottom structure of the rigid support body of this utility model. Detailed Implementation

[0007] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the embodiments do not limit the present invention in any way.

[0008] like Figure 1-4 As shown: A dual-hardness rubber-coated heel cover for shoe heels is characterized by comprising an inner rigid support body 100 and an outer soft elastomer 200. The rigid support body 100 base ensures the anti-slip performance and structural stability of the heel assembly, while the soft elastomer 200 outer layer provides dynamic properties such as high slip resistance, shock absorption, noise reduction, and high abrasion resistance upon landing.

[0009] The rigid support 100 has several connecting posts 110 on its front side for assembly with the heel. The connecting posts 110 are used to connect and fix the top of the shoe to the bottom of the heel. The connecting posts 110 and the rigid support 100 are integrally injection molded.

[0010] The rigid support 100 has at least a portion of the surface in contact with the soft elastomer 200, which has several through holes 120. The purpose of providing through holes 120 in the rigid support 100 is to facilitate the injection material entering the through holes 120 during injection molding of the soft elastomer 200. After cooling, the soft elastomer 200 is formed and fused with the rigid support 100. By providing through holes 120, the contact area between the soft elastomer 200 and the rigid support 100 is increased, thereby improving the fusion effect and the strength of the fused parts.

[0011] The through hole 120 is located on the surface of the rigid support 100 where the connecting post 110 is located. The diameter of the through hole 120 is larger than that of the through hole 120 on the other end surface. The through hole 120 is a stepped hole or a conical hole. In this embodiment, a stepped hole with a larger diameter at the top and a smaller diameter at the bottom is used. The purpose of using a stepped hole or a conical hole is to further improve the fusion strength between the soft elastomer 200 and the rigid support 100. Even if grease or other contaminants enter during the injection molding process, resulting in a low degree of fusion between the soft elastomer 200 and the rigid support 100, the soft elastomer 200 and the rigid support 100 will not directly delaminate and separate.

[0012] The outer edge of the stepped hole is provided with several grooves. The purpose of using grooves is to increase the contact area between the soft elastomer 200 and the support 100, and further improve the fusion firmness between the soft elastomer 200 and the support 100.

[0013] The edge of the rigid support 100 is recessed downward to form a lower step 140. The lower step is covered by the soft elastomer 200, which increases the contact area between the rigid support 100 and the soft elastomer 200. It also has a physical locking effect, which further improves the fusion strength between the soft elastomer 200 and the rigid support 100. In addition, the serrated edge is eliminated, making the transparent skylight more aesthetically pleasing.

[0014] The rigid support 100 has several protrusions 130 on its bottom or front surface that are misaligned with the through hole 120. These protrusions are preferably cylindrical. Their core function is to achieve a tight bond between the rigid support and the soft elastomer through a mechanical interlocking structure, effectively preventing delamination.

[0015] The soft elastomer 200 is injection molded to cover the bottom, side, and lower step of the rigid support 100 and interlocks to form an integral structure.

[0016] The rigid support 100 is made of a material with a Shore hardness of 85A (or Shore hardness of 60D) or higher. The available materials are rubber and plastic materials or composite modified materials. The preferred materials are high-transparency TPU, CPU, carbon fiber, PA, PA composite carbon fiber and TPU composite PA. Because the rigid support 100 plays the role of supporting and connecting the heel, its material must have both a certain toughness for impact resistance and the hardness for support.

[0017] The injection molding temperature of the rigid support 100 is between 170 degrees Celsius and 280 degrees Celsius. In this embodiment, the injection molding temperature is preferably 215 degrees Celsius.

[0018] The soft elastomer 200 is made of a material with a Shore hardness between 78A and 40A. Since the soft elastomer 200 needs to meet the requirements of shock absorption, anti-slip, noise reduction, and wear resistance, it is made of a soft elastic material with low hardness and high wear resistance. In this embodiment, aliphatic TPU is preferred. The structure of this utility model combined with the top layer made of this material has excellent optical transparency, anti-yellowing properties, shock absorption and resilience, high anti-slip properties and high wear resistance, making it more suitable for the application needs of high-end shoe materials such as crystal shoes and transparent soles / heels.

[0019] The injection molding temperature of the soft elastomer 200 is between 150 degrees Celsius and 185 degrees Celsius, preferably 185 degrees Celsius.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0021] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 dual-hardness coated heel cover for shoe heels, characterized in that, It includes an inner rigid support (100) and an outer soft elastomer (200), wherein the rigid support (100) has a plurality of connecting posts (110) on the front for assembly with the heel. The bottom surface of the rigid support (100) has a plurality of through holes (120). The diameter of the through hole (120) on one end surface of the front of the rigid support (100) is larger than the diameter of the through hole (120) on the other end surface. The through hole (120) is a stepped hole. The edge portion of the front of the rigid support (100) is recessed downward to form a lower step (140). The soft elastomer (200) covers the bottom surface, side walls and lower step (140) of the rigid support (100) and interlocks to form an integral structure.

2. The dual-hardness coated heel cover as described in claim 1, characterized in that, The rigid support (100) has several protrusions (130) on its bottom or front surface that are misaligned with the through hole (120).

3. The dual-hardness coated heel cover as described in claim 2, characterized in that, The protrusion (130) on the bottom surface of the rigid support (100) is a cylindrical protrusion.

4. The dual-hardness coated heel cover as described in claim 1, characterized in that, The outer edge of the through hole (120) is provided with several grooves.

5. A dual-hardness coated heel cover as described in any one of claims 1 to 4, characterized in that, The rigid support (100) is made of rubber and plastic material with a Shore hardness of 85A or above or a Shore hardness of 60D or above.

6. A dual-hardness coated heel cover as described in any one of claims 1 to 4, characterized in that, The soft elastomer (200) is made of aliphatic TPU with a Shore hardness of 78A to 40A.

7. A dual-hardness overmolded heel cover as described in any one of claims 1 to 4, characterized in that, The soft elastomer (200) is made of aliphatic TPU, and the rigid support (100) is made of high-transparency TPU.

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