High-elasticity TPU sole
By using a three-layer sole design, combining injection molding of a hard rubber layer and a TPU layer with cross-ribbed air cavities, the problem of insufficient elasticity in existing soles is solved, improving the comfort and durability of the shoes.
Patent Information
- Application Number
- CN202520198429.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-08
AI Technical Summary
Existing shoe sole materials such as rubber and EVA have high hardness and cannot effectively absorb the impact of the ground, resulting in foot fatigue and discomfort, and lacking high elasticity and comfort.
The shoe features a three-layer outsole design. The midsole is injection molded from a single piece of hard rubber and TPU. The insole is bonded to the TPU layer, which has cross-shaped ribs forming air pockets. The outsole is a wear-resistant and slip-resistant layer. The combination of different materials and designs enhances elasticity and comfort.
It achieves high elasticity and good shock absorption, improving the comfort and lifespan of the shoes, and reducing foot fatigue and the risk of injury.
Smart Images
Figure CN223640232U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of shoe sole technology, and in particular relates to a high-elasticity TPU shoe sole. Background Technology
[0002] As people's living standards continue to improve, their demands for shoes are also increasing, with a particular focus on comfort. A key indicator of shoe comfort is the elasticity of the sole. Currently, most shoes, especially basketball shoes and athletic shoes, suffer from insufficient sole elasticity.
[0003] Shoes are an essential item in people's daily lives, and there are many types of them. As an important part of shoes, the sole plays a key role in ensuring comfort. Traditional soles are mainly made of rubber or EVA materials. Although these materials have a certain cushioning effect, they are not able to effectively absorb the impact of the ground due to their high hardness, which can easily lead to foot fatigue and discomfort. Therefore, a highly elastic sole is needed to solve this problem. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-elasticity TPU sole that has advantages such as high elasticity, good shock absorption, comfort, and durability, thereby solving the problems of poor cushioning and low comfort in existing shoes.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A high-elasticity TPU sole includes an insole, a midsole, and an outsole. The midsole has cavities on both sides. The outsole is disposed in the cavity on the downward-facing side of the midsole, and the insole is disposed in the cavity on the upward-facing side of the midsole. The midsole includes a hard rubber layer and a TPU layer. The TPU layer is sleeved inside the hard rubber layer. The hard rubber layer and the TPU layer are integrally injection molded. The insole is disposed on the TPU layer.
[0007] Preferably, the TPU layer has a plurality of cross-shaped ribs on the side facing the inner bottom, the cross-shaped ribs enclosing a cavitation cavity, the inner bottom and the top of the cross-shaped ribs are bonded to each other, and the cross-shaped ribs and the inner bottom are bonded to form a sealed cavitation cavity.
[0008] Preferably, the height of the cross-shaped rib gradually decreases from the heel to the toe, and the heel-toe drop of the cross-shaped rib is 4-10cm.
[0009] Preferably, the outer surface of the hard rubber layer is provided with a wear-resistant and impact-resistant layer, which is located at the toe area.
[0010] Preferably, the outer surface of the hard rubber layer is further provided with a decorative strip, which extends forward from the heel area around the shoe body and connects with the wear-resistant and shock-absorbing layer.
[0011] Preferably, the outsole is a wear-resistant and anti-slip layer, and the outsole is made of TPR, TPE, TPU, TPV or rubber.
[0012] Preferably, the outer bottom surface is provided with wavy anti-slip stripes.
[0013] Preferably, the insole is made of TPU or PU.
[0014] Preferably, the inner bottom is a foamed support layer with elastic breathable pores.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a high-elasticity TPU sole, which is made by integrally injection molding a hard rubber layer and a TPU layer in the midsole, with the relatively soft TPU layer serving as the inner core of the hard rubber layer. The lower bottom layer that touches the ground and the upper bottom layer that fits the foot are arranged in the cavity on both sides of the midsole, forming a highly elastic and moderately soft sole that is comfortable to wear and has a long service life. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a top view of the insole of this utility model.
[0018] Figure 3 This is a bottom view of the midsole of this utility model.
[0019] Figure 4 This is a schematic diagram of the outer bottom of this utility model.
[0020] Figure label:
[0021] 1. Insole;
[0022] 2. Midsole; 21. Recessed cavity; 22. Hard rubber layer; 23. TPU layer; 24. Cross ribs; 25. Bubble cavity; 26. Abrasion-resistant and shock-absorbing layer; 27. Decorative strip.
[0023] 3. Outsole, 31. Anti-slip stripes. Detailed Implementation
[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] like Figure 1-4 As shown, a high-elasticity TPU shoe sole includes an insole 1, a midsole 2, and an outsole 3. The midsole 2 has accommodating cavities 21 on both sides. The outsole 3 is disposed in the accommodating cavity 21 on the downward side of the midsole 2, and the insole 1 is disposed in the accommodating cavity 21 on the upward side of the midsole 2. The midsole 2 includes a hard rubber layer 22 and a TPU layer 23. The TPU layer 23 is sleeved inside the hard rubber layer 22. The hard rubber layer 22 and the TPU layer 23 are integrally injection molded. The insole 1 is disposed on the TPU layer 23.
[0026] By disassembling the sole into three layers (upper, middle, and lower) and using different materials and unique designs based on their usage characteristics, the resulting sole exhibits excellent comfort and high elasticity, providing a comfortable and fatigue-free wearing experience even after prolonged use. A rigid rubber layer 22 with a hollow cavity serves as a frame on the outside of the midsole 2. A TPU layer 23 is integrally injection-molded within the rigid rubber layer 22, and vertical cavities 21 are formed around the upper and lower edges of the rigid rubber layer 22. Figure 1-2 As shown, in this embodiment, the TPU layer 23 is bonded and covered along the inner edge of the upper cavity 21 of the hard rubber layer 22, and the contact surfaces of the cavity 21 are all made of PTU material, while the inner bottom 1 is directly bonded to the PTU layer; and in the lower cavity 21 of the hard rubber layer 22, the bonding surfaces of the outer bottom 3 are the central PTU layer and the outermost hard rubber layer 22, that is, as Figure 3 As shown. When the insole 1 and outsole 3 are respectively bonded to the midsole 2, the bonding surface of the insole 1 is soft and comfortable, and the outsole 3 is tightly bonded, sturdy and durable.
[0027] Furthermore, the TPU layer 23 has several cross-shaped ribs 24 facing the insole 1. The cross-shaped ribs 24 enclose air pockets 25. The insole 1 is bonded to the top of the cross-shaped ribs 24, forming a sealed air pocket 25. The cross-shaped ribs 24 extend from the heel towards the middle of the shoe or directly to the toe, forming an array of at least three rows of air pockets 25. The upper and lower surfaces of the insole 1 are both complete planes. When the insole 1 is attached to the TPU layer 23, the insole 1 and the cross-shaped ribs 24 form a completely sealed air pocket 25. The air pocket 25 automatically stores air to act as an elastic liner. Combined with the soft material of the TPU layer 23 itself, when integrated into a shoe, when the foot is pressed down, in addition to the TPU layer 23 and the cross-shaped ribs 24 acting as a support structure, the air in the air pocket 25 is compressed, which also increases elasticity and provides cushioning.
[0028] Furthermore, the height of the cross-shaped rib 24 gradually decreases from the heel to the toe, and the heel-to-toe drop of the cross-shaped rib 24 is 4-10cm. Heel-to-toe drop refers to the height difference between the heel and the forefoot. Modern running shoes often have a larger heel-to-toe drop, which is beneficial for rapid propulsion and rolling landing, but this can also lead to knee pain. The 4-10cm heel-to-toe drop used in this embodiment helps the shoe roll quickly during running, reduces strain on the Achilles tendon, provides good support and comfort, and also helps reduce the risk of injury.
[0029] Furthermore, the outer surface of the hard rubber layer 22 is provided with an abrasion-resistant and impact-resistant layer 26, which is located at the toe area. This abrasion-resistant and impact-resistant layer 26 helps increase the contact area between the sole and the external environment during daily wear, while also protecting the foot from injury.
[0030] Furthermore, the outer surface of the hard rubber layer 22 is also provided with a decorative strip 27, which extends forward from the heel, around the shoe body, and connects with the wear-resistant and shock-absorbing layer 26. This decorative strip 27 enriches the shape and color of the sole, while also providing waterproofing. When stepping into shallow water, the decorative strip 27 effectively prevents water from spreading to the shoe surface, keeping the shoes clean, tidy, and durable.
[0031] Furthermore, the outsole 3 is a wear-resistant and anti-slip layer, and the outsole 3 is made of TPR, TPE, TPU, TPV, or rubber. Using these materials to make the outsole 3 makes it more durable and wear-resistant. During long-term use, the wear on the outsole 3 is reduced, effectively extending the lifespan of the shoes.
[0032] Furthermore, the outsole 3 has wavy anti-slip stripes 31 on its surface. These anti-slip stripes 31 help prevent the shoe from slipping on smooth surfaces during wear, thus avoiding accidental injuries.
[0033] Furthermore, the insole 1 is made of TPU or PU. The insole 1 made of this material is soft and comfortable, and it adheres well to the TPU layer 23 of the midsole 2, making it less prone to loosening.
[0034] Furthermore, the insole 1 is a foam support layer with elastic breathable pores. The upper and lower surfaces of the insole 1 are both flat, while the middle is a dense foam support layer, which can further increase the elasticity of the sole and make it more comfortable to use.
[0035] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.
Claims
1. A high-elasticity TPU shoe sole, characterized in that: The device includes an insole, a midsole, and an outsole. The midsole has cavities on both sides. The outsole is located in the cavity on the lower side of the midsole, and the insole is located in the cavity on the upper side of the midsole. The midsole includes a hard rubber layer and a TPU layer. The TPU layer is sleeved inside the hard rubber layer. The hard rubber layer and the TPU layer are integrally injection molded. The insole is located on the TPU layer.
2. The high-elasticity TPU sole according to claim 1, characterized in that: The TPU layer has several cross-shaped ribs on the side facing the inner bottom, and the cross-shaped ribs enclose a cavitation cavity. The inner bottom is bonded to the top of the cross-shaped ribs, and the cross-shaped ribs and the inner bottom are bonded together to form a sealed cavitation cavity.
3. The high-elasticity TPU sole according to claim 2, characterized in that: The height of the cross-shaped rib gradually decreases from the heel to the toe, and the heel-toe drop of the cross-shaped rib is 4-10cm.
4. The high-elasticity TPU sole according to claim 1, characterized in that: The outer surface of the hard rubber layer is provided with a wear-resistant and impact-resistant layer, which is located at the toe area.
5. The high-elasticity TPU sole according to claim 4, characterized in that: The outer surface of the hard rubber layer is also provided with a decorative strip, which extends forward from the heel area around the shoe body and connects with the wear-resistant and shock-absorbing layer.
6. The high-elasticity TPU sole according to claim 1, characterized in that: The outsole has a wear-resistant and anti-slip layer.
7. The high-elasticity TPU sole according to claim 6, characterized in that: The outsole surface is provided with wavy anti-slip stripes.
8. The high-elasticity TPU sole according to claim 1, characterized in that: The inner bottom is a foamed support layer with elastic, breathable pores.