TWM644360U - Twist-resistant dual hardness midsole - Google Patents

Abstract

A torsion-resistant dual-hardness shoe midsole includes a midsole body. The midsole body includes a front area, and a rear area integrally connected with the front area, the front area has a front area hardness, and can define a front area length extending along a length direction, and the rear area has a The hardness of the rear region is smaller than the hardness of the front region, and can define a length of the rear region extending along the length direction and smaller than the length of the front region. The outer contour shape of the midsole body is in the shape of a foot.

Description

Torsion resistant dual durometer midsole

The present invention relates to a midsole, in particular to a torsion-resistant double-hardness shoe midsole.

As shown in Figure 1, it is a kind of midsole 1 traditionally used to make shoes. The midsole 1 is generally made of EVA as the molding material and foamed. Based on the material characteristics of EVA being soft, the midsole 1 has a good However, because the EVA material is too soft, the midsole 1 tends to become flat and dense after being worn for a long time, which makes the effect of cushioning and shock absorption worse. Moreover, Due to the lack of rigidity and hardness of the midsole 1, when actually wearing it, if the user steps on the ground with different heights, the midsole 1 will often twist left and right or back and forth, causing the user's foot A sprained ankle due to the relative twisting of the forefoot to the rear heel.

As shown in Figure 2, in order to improve the above-mentioned lack of the midsole 1, someone fixed a carbon fiber plate 2 (referred to as an iron core in the industry, shank) on the top surface of the midsole 1. The structural rigidity of the plate 2 is used to reduce the degree of torsion of the midsole 1 left and right or the degree of torsion back and forth. However, increasing the carbon fiber plate 2 will increase the The manufacturing process and cost increase, and the carbon fiber plate 2 cannot improve the problem that the midsole 1 will collapse and become dense after being worn for a long time.

It is therefore an object of the present invention to provide a torsion-resistant dual-durometer midsole capable of overcoming at least one of the disadvantages of the prior art.

Therefore, the torsion-resistant dual-hardness midsole of the present invention includes a midsole body.

The midsole body includes a front area, and a rear area integrally connected with the front area, the front area has a front area hardness, and can define a front area length extending along a length direction, and the rear area has a The hardness of the rear region is smaller than the hardness of the front region, and can define a length of the rear region extending along the length direction and smaller than the length of the front region. The outer contour shape of the midsole body is in the shape of a foot.

The effect of the present model is that: the length of the front region of the front region of the midsole body is greater than the length of the rear region of the rear region, and the design of the hardness of the front region of the front region is greater than the hardness of the rear region of the rear region. The front area covers the forefoot and the arch of the human foot, and the rear area covers the rear heel of the human foot, and the structural rigidity of the front area can be greater than the structural rigidity of the rear area, that is, the new model is not used. In the case of the known carbon fiber plate 2, the front area can still provide good support for the forefoot and the arch of the human foot. In this way, in actual wearing, even if the user steps on the ground with different height differences, the New type also It is not easy to twist left and right or back and forth, and can effectively prevent the user's foot from twisting the ankle due to the relative twisting of the forefoot and the heel. At the same time, the rear area can provide good cushioning for the heel of the human foot. with shock absorbing effect.

100: midsole

10: midsole body

11: front area

12: back area

X: length direction

L: total length of midsole

L1: Front area length

L2: length of rear area

200: vamp

300: outsole

400: shoes

1: midsole

2: carbon fiber board

Other features and effects of the present model will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a perspective view of a conventional midsole after twisting; Fig. 2 is a perspective view illustrating the conventional A carbon fiber plate is arranged on the top surface in the midsole of the shoe; Fig. 3 is a perspective view of an embodiment of the torsion-resistant double hardness shoe midsole of the present invention; Fig. 4 is a top view of this embodiment; Fig. 5 is a cross-sectional view of this embodiment ; and Fig. 6 is a side view illustrating that the embodiment is combined with a vamp and a large bottom to make a shoe.

Referring to FIGS. 3 , 4 , and 5 , it is an embodiment of the torsion-resistant dual-hardness shoe midsole 100 of the present invention. The shoe midsole 100 includes a midsole body 10 .

The midsole body 10 includes a front area 11 and a rear area 12 integrally connected with the front area 11. The front area 11 has a front area hardness and can define a front area extending along a length direction X Length L1, the rear region 12 has a rear region hardness that is less than the hardness of the front region, and can define a rear region length L2 that extends along the length direction X and is smaller than the length L1 of the front region. The outer surface of the midsole body 10 The outline shape is that of a foot.

In this embodiment, the material of the midsole body 10 is thermoplastic polyurethane (TPU).

In this embodiment, the hardness of the front area is Shore C (Shore C) between 45-65, and the hardness of the back area is Shore C (Shore C) between 30-44. Preferably, the hardness of the front area is It is a Shore hardness C ranging from 50 to 55, and the hardness of the back zone is a Shore hardness C ranging from 35 to 40.

In this embodiment, the tensile strength of the midsole body 10 is >15kgf/cm ² , the tear strength of the midsole body 10 is >10kgf/cm ² , the elongation of the midsole body 10 is >250%, and the middle The falling ball rebound rate of the bottom body 10 is >45%, and the normal temperature compression rate of the midsole body 10 is <10%.

It can be understood that, in other variations of this embodiment, the material of the midsole body 10 can also be changed to polyether-polyamide block copolymer (Polyether Block Amide, Pebax) or polyurethane (Polyurethane, PU) or ethylene vinyl acetate (EVA), but not limited thereto.

In this embodiment, the midsole body 10 can define a total length L of the midsole extending along the length direction X, the length L1 of the front region is between 60% and 70% of the total length L of the midsole, and the rear The region length L2 is between 30% and 40% of the total length L of the midsole. It can be understood that the front region 11 roughly corresponds to the area of the forefoot and the arch of the human foot, and the rear region 12 roughly corresponds to in the heel area of the human foot.

In this embodiment, the midsole body 10 is foamed using a supercritical fluid as a physical foaming agent. Preferably, the supercritical fluid is nitrogen. It can be understood that in this embodiment In other variations, the supercritical fluid can also be changed to carbon dioxide, but it is not limited thereto.

Thereby, as shown in FIG. 6 , the midsole 100 can be connected with a shoe upper 200 and a large sole 300 to manufacture a shoe 400 .

Through the above description, the advantages of the present invention can be summarized as follows:

1. The present model utilizes the design that the length L1 of the front region of the front region 11 of the midsole body 10 is greater than the length L2 of the rear region of the rear region 12, and the hardness of the front region of the front region 11 is greater than the hardness of the rear region of the rear region 12. , the front region 11 can be allowed to cover the area of the forefoot and the arch of the human foot, and the rear region 12 can be allowed to cover the area of the rear heel of the human foot, and the structural rigidity of the front region 11 can be allowed to be greater than that of the rear region 12, compared with the prior art, the front area 11 can still provide good support for the forefoot and the arch of the human foot without using the conventional carbon fiber plate 2 in the present invention. , in actual wearing, even if the user steps on the ground with different height differences, the new model is not prone to left The situation of twisting to the right or back and forth can effectively prevent the user's foot from spraining the ankle due to the relative twisting of the forefoot and the rear heel. At the same time, the rear area 12 can provide good cushioning and Shock absorbing effect.

2. This new model uses supercritical fluid as a physical foaming agent, and foam molding is made without adding any chemical foaming bridging agent. During the manufacturing process, it is non-toxic, odorless and has no chemical residues, which can effectively reduce the impact on Environmental pollution, and low energy consumption, low carbon emissions, in line with the needs of environmental protection.

3. This new model is made of supercritical fluid as a physical foaming agent, and made by foam molding. During the manufacturing process, no chemical foaming bridging agent is added. This new model can be 100% fully recovered after use, and can be recycled into products.

To sum up, the new twist-resistant dual-hardness shoe midsole can not only resist torsion, provide good support, but also have good cushioning and shock-absorbing effects, and can simplify the manufacturing process and reduce manufacturing costs. So really can reach the purpose of this novel.

But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of implementation of the present invention with this. All simple equivalent changes and modifications made according to the patent scope of the present application and the content of the patent specification are still within the scope of the present invention. Within the scope covered by this patent.

100: midsole

10: midsole body

11: front area

12: back area

X: length direction

L: total length of midsole

L1: Front area length

L2: length of rear area

Claims (7)

A torsion-resistant dual-hardness shoe midsole, comprising: a midsole body, including a front area, and a rear area integrally connected with the front area, the front area has a front area hardness, and can define an edge a length of the front region extending in the longitudinal direction, the rear region has a hardness of the rear region less than the hardness of the front region, and can define a length of the rear region extending along the length direction and smaller than the length of the front region, the midsole body The outer contour shape is a foot shape. The torsion-resistant dual-hardness shoe midsole as described in Claim 1, wherein the hardness of the front area is Shore C hardness between 45-65, and the hardness of the rear area is Shore C hardness between 30-44 . The torsion-resistant dual-hardness shoe midsole as described in claim 2, wherein the hardness of the front area is between 50-55 Shore C, and the rear area is between 35-40 Shore C . The torsion-resistant dual-hardness shoe midsole as claimed in claim 1, wherein the midsole body can define a total length of the midsole extending along the length direction, and the length of the front region is between the total length of the midsole 60%~70%, the length of the back zone is between 30%~40% of the total length of the midsole. The torsion-resistant dual-hardness shoe midsole as claimed in claim 1, wherein the material of the midsole body is selected from thermoplastic polyurethane, polyether-polyamide block copolymer, polyamide A group consisting of urethane and ethylene vinyl acetate. The torsion-resistant dual-hardness shoe midsole as described in claim 1, wherein the midsole body uses a supercritical fluid as a physical foaming agent to generate Bubble molding made. The torsion-resistant dual-hardness shoe midsole as claimed in claim 6, wherein the supercritical fluid is nitrogen.