Soft insole of high-heeled shoes for dispersing pressure of human body

Abstract

The utility model discloses a soft quality structure design's human body dispersion pressure's high -heeled shoes soft quality insole relates to high -heeled shoes manufacturing technical field, specifically is a soft quality structure design's human body dispersion pressure's high -heeled shoes soft quality insole, including soft quality insole, it is composed by forefoot and rear foot sole. The end surface of forefoot is equipped with the convex surface and the concave surface of the wave shape profile, can adapt the sole shape, and optimizes pressure distribution. The steel sheet that extends from heel to midfoot is equipped under soft quality insole, provides support and stability. Forefoot adopts high resilience soft quality material, and the thickness is greater than heel area, and enhances the buffer, and the material density of heel is higher, and the support and the flexibility are given full play to. The overall outer edge size is less than insole, and it is convenient for embedding and fixing. The structure effectively disperses the plantar pressure, and improves the wearing comfort and stability.

Description

Technical Field

[0001] This utility model relates to the field of high-heel shoe manufacturing technology, specifically to a soft midsole for high-heel shoes with a soft structure design that distributes pressure on the human body. Background Technology

[0002] While high heels enhance the wearer's figure and appearance, their sole design can lead to uneven pressure distribution on the feet, especially in the forefoot area where excessive pressure is borne. Prolonged wear can easily cause pain, fatigue, and even foot deformities. Traditional high heels often use a single material or a simple cushioning structure in the midsole, lacking optimized design for foot pressure distribution, making it difficult to balance support and comfort.

[0003] In existing technologies, some designs attempt to improve cushioning by adding soft materials or locally thickening the midsole, but the following problems still exist: (1) Uneven pressure distribution: The pressure is concentrated in the forefoot area, lacking an adaptive design to the foot contour, and the local pressure peak is significant; (2) Conflict between support and damping: rigid materials (such as steel sheets) provide stability but weaken damping, while soft materials are prone to collapse, resulting in insufficient support; (3) Abrupt structural transition: Stress concentration is prone to occur in the area where the forefoot and heel connect, affecting the naturalness of walking. Summary of the Invention

[0004] The purpose of this invention is to provide a soft midsole for high heels with a soft structure design that distributes pressure on the human body. By setting up a soft midsole, convex surface, concave surface and steel plate, it solves the problems of uneven pressure distribution, contradiction between support and cushioning, and stiff structural transition mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a soft midsole for high heels with a soft structure design to distribute pressure on the human body, comprising a soft midsole, the soft midsole comprising a forefoot and a heel, the end face of the forefoot having a convex surface and a concave surface, and a steel plate at the lower end of the soft midsole.

[0006] Furthermore, the convex and concave surfaces of the forefoot end face have a wavy profile to optimize pressure distribution.

[0007] Furthermore, the steel plate extends from under the heel to under the midfoot area to provide overall support.

[0008] Furthermore, the soft material of the forefoot has high resilience, enabling it to deform under pressure and quickly recover.

[0009] Furthermore, the forefoot is thicker than the heel to enhance the cushioning effect of the forefoot.

[0010] Furthermore, the curvature variations of the convex and concave surfaces are adapted to the shape of the foot to reduce localized pressure during walking and standing.

[0011] Furthermore, the soft material in the heel is denser than that in the forefoot, in order to provide support while maintaining overall flexibility.

[0012] Furthermore, the connection area between the forefoot and the heel adopts a gradual thickness transition to avoid stress concentration and improve force distribution.

[0013] Furthermore, the overall outer edge contour dimension of the soft midsole is smaller than that of the insole of the high heel, so as to fit into the shoe cavity and ensure a stable connection with the shoe body.

[0014] This invention provides a soft midsole for high heels with a flexible structure that distributes body pressure, offering the following advantages: 1. Effectively disperses foot pressure and improves wearing comfort: By setting a wave-shaped contour structure formed by convex and concave surfaces on the forefoot end, the contact area with the foot is increased, the pressure distribution is optimized, local high pressure points are reduced, and forefoot pain and fatigue caused by wearing high heels for a long time are significantly relieved.

[0015] Enhanced structural support and stability: The built-in steel plate extends from the heel to the midfoot area, effectively improving the bending rigidity and overall support of the midsole, preventing excessive bending of the midfoot, improving walking stability, and reducing the risk of sprains.

[0016] Optimized cushioning and rebound performance: The forefoot uses a high-resilience soft material that can quickly deform and recover when subjected to force, providing good cushioning, reducing the impact of the ground on the foot when walking, and enhancing the feeling of lightness in walking.

[0017] Enhanced forefoot cushioning design: The forefoot is thicker than the heel, further enhancing the cushioning capacity of the forefoot area, especially suitable for the heavy load on the forefoot when wearing high heels, thus improving comfort.

[0018] Conforming to the physiological curves of the foot: The curvature of the convex and concave surfaces is designed according to the shape of the sole, making the midsole fit the arch and forefoot contours better, further improving the pressure distribution effect and reducing compression and discomfort.

[0019] Zoned material density design: The heel uses a high-density material to ensure heel support and stability while maintaining overall flexibility, avoiding an overly stiff feel and achieving a balance between support and comfort.

[0020] Smooth transition structure avoids stress concentration: The area connecting the forefoot and heel adopts a gradual thickness transition, which effectively avoids stress concentration caused by sudden changes in thickness, extends the life of the midsole, and improves force flow distribution.

[0021] Easy to integrate and assemble: The outer edge of the soft midsole is smaller than that of the insole of high heels, so it can be embedded into the shoe cavity and fixed, ensuring a firm connection with the shoe body, avoiding displacement or deformation, and improving the applicability and reliability of the product. Attached Figure Description

[0022] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the collection component of this utility model; Figure 3 This is a schematic diagram of the structure of the cleaning component of this utility model; Figure 4 This is a schematic diagram of the overall side view of the present invention. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] Example 1 A soft midsole for high heels with a flexible structure designed to distribute body pressure is described in the following embodiment: The soft midsole 1 is manufactured using a one-time injection molding process and is made of a high-performance thermoplastic polyurethane and high-resilience EVA mixed foam material. This mixed material is precisely proportioned, with its Shore C hardness set between 50 and 55 degrees, ensuring that the material possesses excellent softness, high resilience, and fatigue resistance.

[0027] In this embodiment, the soft midsole 1 is clearly divided into two functional areas: the forefoot 11 and the heel 12. The thickness of the forefoot 11 is designed to be significantly greater than that of the heel 12. Specifically, the thickest part of the forefoot 11 is about 8 mm, while the heel 12 area is about 4 mm thick due to the overall slope of the high heel. This significant thickness difference aims to maximize the cushioning effect of the forefoot area to cope with the challenge of the body weight being mainly concentrated in the forefoot when wearing high heels.

[0028] The lower surface of the forefoot 11 features an innovative wave-shaped contour design. This contour is not a simple undulation, but rather consists of a series of alternating, ergonomically calculated convex surfaces 111 and concave surfaces 112. The top of the convex surfaces 111 is rounded, serving as the initial contact and primary support point; the concave surfaces 112 provide pressure release space. These surfaces are not of fixed curvature; their curvature variations are precisely designed to highly adapt to the distribution of metatarsal heads and soft tissue morphology in the forefoot of most people. When pressure is applied to the forefoot, the convex surfaces 111 undergo controllable compression deformation, converting part of the vertical impact force into the material's own deformation potential energy, and laterally dispersing the pressure by squeezing the adjacent concave surface 112 areas. This avoids excessive pressure concentration in the metatarsal region, effectively reducing local high-pressure points and significantly improving comfort during walking and standing.

[0029] Furthermore, the steel plate 2 is made of high-carbon steel that has undergone heat treatment and rust prevention. Its length extends forward from directly below the calcaneal support area of ​​the heel 12 and terminates below the navicular bone in the midfoot area, rather than reaching the forefoot. This steel plate 2 is pre-placed in a mold and tightly bonded to the soft midsole 1 through a secondary injection molding process, forming a composite structure. The core function of the steel plate 2 is to provide overall support and torsional resistance. It ensures that the high heels will not become unstable due to excessive midfoot flexion when worn, while effectively transferring some of the force borne by the heel to the forefoot, ensuring gait stability. The wave-shaped soft structure of the forefoot, on this basis of stability, focuses on pressure distribution and cushioning. The two functions complement each other, jointly improving the biomechanical performance of the high heels.

[0030] Example 2 Another type of soft midsole for high heels, designed to distribute body pressure, is implemented as follows: This embodiment focuses on material gradient design and smooth structural transition to further optimize performance. The soft midsole 1 is manufactured using dual-density composite injection technology. The forefoot portion 11 uses an ultra-soft, high-resilience polyurethane material with a Shore C hardness of 45 degrees. This material has an extremely low compression set, ensuring that it can quickly and fully recover its original shape after repeated, long-term pressure application, providing durable high cushioning. The heel portion 12 uses a microporous polyurethane material with a Shore C hardness of 60 degrees. Its higher density and tighter structure aim to provide more solid support and reinforcement in the heel area, effectively controlling the impact of heel landing and suppressing unstable heel swaying, while maintaining overall structural flexibility without sacrificing comfort.

[0031] In this embodiment, the wavy profile of the forefoot 11 end face has been refined. The distribution and radius of curvature of the convex surfaces 111 and concave surfaces 112 have been specifically adjusted according to the typical location of the metatarsal heads. Specifically, the convex surfaces 111 corresponding to the first and fifth metatarsal heads are designed to be wider and have a gentler curvature to provide stable lateral support; corresponding to the area of ​​the middle metatarsal head, the convex surfaces 111 are denser and have a slightly larger curvature to provide more precise pressure regulation. This design, which adapts to the shape of the foot, ensures that pressure is distributed to the entire forefoot area to the maximum extent during the propulsion phase of the gait cycle, rather than a few isolated points, thereby greatly reducing pain and fatigue caused by localized pressure concentration.

[0032] A key design detail lies in the connection area between the forefoot 11 and the heel 12, i.e., the midfoot region. Instead of a simple stepped thickness change, this area features a 3-centimeter-long gradual thickness transition zone. The thickness of the soft midsole 1 smoothly and linearly increases from approximately 4 millimeters at this point to approximately 9 millimeters in the forefoot. This smooth transition is crucial, completely avoiding stress concentration that could occur due to abrupt changes in thickness. It ensures a smoother and more natural transfer of plantar pressure from the midfoot to the forefoot, improves the overall stress distribution of the midsole, eliminates potential structural weaknesses, and enhances the product's durability and consistent comfort.

[0033] Example 3 Another type of soft midsole for high heels with a flexible structure designed to distribute body pressure is described below: This embodiment focuses on the integration and assembly of the soft midsole with the high heel shoe body. The overall outer contour dimensions of the soft midsole 1 are intentionally designed to be slightly smaller than the insole dimensions of a standard high heel shoe, with each side reduced by approximately 1.5 mm in both length and width. This design allows it to be precisely embedded and accommodated as an independent modular component within the shoe cavity formed by the upper and midsole or shoe groove. After embedding, a small assembly gap is formed between the side of the soft midsole 1 and the inner wall of the shoe cavity, providing space for subsequent adhesive application.

[0034] During assembly, a high-strength, flexible polyurethane adhesive is injected into the gap. After mechanical pressing, the soft midsole 1 can be firmly bonded to the shoe body as a whole. This "embedded" design ensures a stable bond and effectively prevents displacement or delamination between the midsole and the shoe body during walking. At the same time, its soft sides can better fit the seams of the upper without causing unnecessary friction or compression.

[0035] In this embodiment, the design of the steel plate 2 also supports this integration concept. The width of the steel plate 2 is slightly smaller than the width of the soft midsole 1 and is completely encased within the material. Its end is sufficiently far from the edge of the midsole, which not only avoids interference between the steel plate 2 and the shoe body during embedding but also prevents its edge from puncturing the covering material after long-term use. The extension range of the steel plate 2 is strictly controlled from the heel to the midfoot, providing the necessary rigidity to the midfoot. This ensures that the entire component will not bend or deform during the process of embedding the midsole into the shoe cavity and pressing it together, guaranteeing the accuracy and efficiency of assembly. At the same time, the forefoot area 11 fully maintains its soft, wavy contour and high rebound characteristics, ensuring that the core function of pressure distribution is not affected. This design achieves a highly efficient unity of support and comfort, modularity and integration.

[0036] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and components is omitted in the specific implementation of this disclosure. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soft midsole for high heels with a soft structure design to distribute pressure on the human body, comprising a soft midsole (1), characterized in that: The soft midsole (1) includes a forefoot (11) and a heel (12). The end face of the forefoot (11) is provided with a convex surface (111) and a concave surface (112). The lower end of the soft midsole (1) is provided with a steel plate (2).

2. The soft midsole for high heels with a soft structure design for distributing human body pressure as described in claim 1, characterized in that: The convex (111) and concave (112) surfaces of the forefoot (11) end face have a wavy profile to optimize pressure distribution.

3. The soft midsole for high heels with a soft structure design for distributing human body pressure as described in claim 1, characterized in that: The steel plate (2) extends from under the heel (12) to under the midfoot area to provide overall support.

4. The soft midsole for high heels with a soft structure design for distributing human body pressure according to claim 1, characterized in that: The soft material of the forefoot (11) has high resilience and can deform under pressure and recover quickly.

5. The soft midsole for high heels with a soft structure design for distributing human body pressure according to claim 1, characterized in that: The forefoot (11) is thicker than the heel (12) to enhance the cushioning effect of the forefoot.

6. The soft midsole for high heels with a soft structure design for distributing human body pressure according to claim 1, characterized in that: The curvature changes of the convex surface (111) and concave surface (112) are adapted to the shape of the foot to reduce local pressure when walking and standing.

7. The soft midsole for high heels with a soft structure design for distributing human body pressure according to claim 1, characterized in that: The soft material of the heel (12) has a higher density than that of the forefoot (11) to provide support while maintaining overall flexibility.

8. The soft midsole for high heels with a soft structure design for distributing human body pressure according to claim 1, characterized in that: The connection area between the forefoot (11) and the heel (12) adopts a gradual thickness transition to avoid stress concentration and improve force distribution.

9. The soft midsole for high heels with a soft structure design for distributing human body pressure according to claim 1, characterized in that: The overall outer edge contour dimension of the soft midsole (1) is smaller than that of the insole of the high heel, so as to be embedded in the shoe cavity and ensure a stable connection with the shoe body.

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