TWI875534B - A resilient insole and its midsole - Google Patents

Abstract

A resilient insole has at least one raised part and at least two lower parts along an extending direction, which at least one raised part is located between the two adjacent lower parts. At least one raised part includes two connecting surfaces on both sides, and an upper surface located between the two connecting surfaces, wherein at least one raised part connects to the two adjacent lower parts through the two connecting surfaces respectively.

Description

A kind of elastic insole and shoe midsole

An elastic insole and a midsole thereof, in particular a wavy elastic insole and a midsole thereof.

In today's society, a user almost always wears a pair of shoes outside of home, whether indoors or outdoors, in addition to daily life at home. The user wears shoes for several hours a day, so the performance of the shoes is very important. Among the various parts of the shoe, the midsole is the part that has the greatest impact on sports performance. The midsole is located between the outsole and the upper, and its functions include shock absorption, propulsion feedback, and maintaining stability. The impact force generated when the user's foot lands will be absorbed and cushioned by the midsole, reducing the impact force and avoiding damage to the user's feet or joints. Therefore, producing midsoles that meet the different gait patterns of users is a technical focus of each shoe factory.

However, although the midsole provides shock absorption and rebound functions, it is mainly aimed at supporting the direction perpendicular to the upper, and its support capacity, deformation and resilience for forces applied parallel to the upper are relatively low. In addition, the main materials used in the midsoles of shoes in the industry are vinyl acetate copolymer (EVA) or polyurethane (PU), which has the advantage of being light in weight, but the durability of such polymer materials is low. After long-term use and repeated bending, the elasticity and support of the midsole will decline. Furthermore, the production process of the midsole of shoes in the industry is usually cumbersome and time-consuming, which increases the production cost.

In view of this, how to produce insoles with good shock absorption and cushioning, propulsion and feedback capabilities, and how to extend the service life of insoles so that they can withstand multiple bends without increasing the complexity of the production process are goals that shoe factories attach great importance to.

In order to increase the shock absorption, cushioning and feedback capabilities of the insole and extend its service life, the present invention provides an elastic insole, which is integrally formed and includes at least one raised support portion and at least two lower support surfaces along a length direction, the two lower support surfaces are arranged at intervals from each other, and at least one of the raised support portions is located between the adjacent lower support surfaces, at least one of the raised support portions includes two connecting surfaces located on both sides, and an upper support surface located between the two connecting surfaces, wherein at least one of the raised support portions is connected to the two adjacent lower support surfaces through the two connecting surfaces respectively.

Wherein, at least one of the raised supporting parts includes at least one cut groove, and the cut groove extends toward the two adjacent lower supporting surfaces, wherein both ends of the cut groove extend to at least a portion of the two connecting surfaces on both sides of at least one of the raised supporting parts.

The length of an upper support formed by the connection between the two connecting surfaces and the upper support surface is less than the length of a lower support formed by the ends of the two connecting surfaces away from the upper support surface.

Among them, three lower supporting surfaces are arranged at intervals along the length direction, and two protruding supporting portions are arranged between two adjacent lower supporting surfaces.

Wherein, the elastic insole is arc-shaped along the length direction.

Furthermore, the elastic insole is formed by impregnating a fiber material with a resin material and then forming the fiber material into one piece, and the fiber material is a carbon fiber material.

The present invention also provides a shoe midsole, comprising an elastic insole as described in any one of claims 1 to 9, wherein the elastic insole is embedded in a foam material.

The elastic insole provided by the present invention adopts an integrated manufacturing method, which can simplify the manufacturing process and reduce costs. The mesh carbon fiber has the characteristics of light weight. Its strength, toughness, and support capacity are superior to common cushioning materials, which can effectively reduce the situation of permanent deformation and inability to rebound due to elastic fatigue. The lightweight carbon fiber is not too heavy when used in the midsole of the shoe, and has a longer service life than ordinary cushioning materials, which can meet the needs of users.

10: Elastic insole

11: Raised support part

112: Upper support surface

113: Connection surface

12: Lower support surface

13: Grooving

Figure 1 A three-dimensional diagram of a preferred embodiment of the present invention

Figure 2 A top view of a preferred embodiment of the present invention

Figure 3 Side view of the preferred embodiment provided by this new model

Figure 4 Side view of the preferred implementation provided by this new model

Referring to FIG. 1 and FIG. 2 , the present invention provides an elastic insole, comprising a wavy elastic insole 10, the elastic insole 10 is formed in an integral manner into a sheet, the elastic insole 10 has at least two raised support portions 11 and at least three lower support surfaces 12 in the length direction, wherein the three lower support surfaces 12 are spaced apart from each other. , and the two raised supporting portions 11 are located between the adjacent lower supporting surfaces 12, and each of the raised supporting portions 11 is raised toward one side of each of the lower supporting surfaces 12, so that when the elastic insole 10 is observed from the side view of FIG. 2, the elastic insole 10 forms a wave structure corresponding to each of the raised supporting portions 11 and each of the lower supporting surfaces 12.

As shown in FIG. 4 , when viewed from the side along the length direction of the elastic insole 10 , the elastic insole 10 presents an arc shape that curves upward in both the head and tail directions and points downward in the middle. This structure can fit the arc of the sole of the user to provide appropriate support.

Furthermore, each of the protruding support portions 11 includes two connecting surfaces 113 located at two sides and an upper supporting surface 112 located between the two connecting surfaces 113, wherein the protruding support portion 11 is connected to the two adjacent lower supporting surfaces 12 through the two connecting surfaces 113 respectively; the angle between the upper supporting surface 112 and the connecting surface 113 can be a sharp angle, a right angle or a blunt angle less than 180., wherein a horizontal height of the upper supporting surface 112 is higher than the horizontal height of the lower supporting surface 12. Furthermore, in a preferred embodiment of the present invention, an upper support length L formed by the connection between two of the connection surfaces 113 and one of the upper support surfaces 112 is less than a lower support length L' formed by the connection between two of the connection surfaces 113 and two of the lower support surfaces 12 (see FIG. 3).

The elastic insole 10 supports a user's foot with each upper support surface 112. Preferably, the two upper support surfaces 112 correspond to a heel position and a sole position of the user respectively. The wave-like structure formed by the raised support portion 11 and the lower support surface 12 makes the elastic insole 10 different from other materials with greater rigidity. It can withstand slight and large degrees of bending and rebound to its original shape, thereby meeting the different degrees of bending caused by different gait when the user walks or runs.

As shown in FIG1 , each of the raised support portions 11 includes at least one cutout 13. The cutout 13 extends toward the two adjacent lower support surfaces 12. Preferably, both ends of the cutout 13 extend to at least a portion of the two connecting surfaces 113 on both sides of one of the raised support portions 11. If the length of the cutout 13 extends to the connection between the connecting surface 113 and the lower support surface 12, the elastic insole 10 will be softer; if the length of the cutout 13 does not extend to the connection between the connecting surface 113 and the lower support surface 12, the elastic insole 10 will be harder. When the elastic insole 10 bears the pressure from the user's foot with each of the raised support parts 11, it can generate different deformations and provide different degrees of support with each of the grooves 13 as intervals, so that the insole can still fit the sole of the user's foot. Furthermore, when the elastic insole 10 encounters an environmental impact force, such as when the user steps on a stone or an uneven road surface, the grooves 13 retain space for deformation, so that the elastic insole 10 can adapt to the environmental impact force to produce deformation and recover through its own elasticity.

The elastic insole 10 in this embodiment is made of carbon fiber, which has a mesh structure. Carbon fiber is light in weight, and its strength and toughness are superior to common cushioning materials. The mesh structure can further enhance the support capacity of the elastic insole 10, stabilize the structure, and reduce the situation where the elastic insole 10 is permanently deformed and unable to rebound due to elastic fatigue after repeated bending. The elastic insole 10 is used as the midsole structure of the shoe. The lightweight mesh carbon fiber makes the midsole of the shoe not too heavy, and has a service life higher than that of ordinary cushioning materials, which can meet the needs of users.

Furthermore, the elastic insole 10 can also be applied to a midsole of a shoe, and the elastic insole 10 can be set in the midsole of a shoe through a known shoemaking process. For example, the elastic insole 10 is combined with other foaming materials and embedded in the midsole of the shoe, so that the midsole of the shoe has an elastic and high-supporting internal structure, and at the same time gives the user a soft touch to the foot.

The elastic insole 10 of this embodiment is manufactured by one-piece molding, which can reduce the waste caused by cutting, and does not require the splicing process or repeated hot pressing. Its simplified process can effectively reduce costs. In this embodiment, the thermoplastic resin used to make the elastic insole 10 is polycarbonate (PC resin), but other types of thermoplastic resins or thermosetting resins can also be used for impregnation to achieve the effect of one-piece molding.

10: Elastic insole

11: Raised support part

12: Lower support surface

13: Grooving

Claims (8)

A flexible insole is a one-piece, integrally formed in a length direction and comprising at least one raised support portion and at least two lower support surfaces, the two lower support surfaces are spaced apart from each other, and at least one of the raised support portions is located between the adjacent lower support surfaces, and at least one of the raised support portions comprises two connecting surfaces located at two sides and two connecting surfaces located at two sides. An upper supporting surface between the connecting surfaces, wherein at least one of the raised supporting portions is connected to the two adjacent lower supporting surfaces through the two connecting surfaces, wherein a horizontal height of the upper supporting surface is higher than the horizontal height of at least two lower supporting surfaces, wherein the elastic insole is formed by impregnating a carbon fiber material with a resin material. As in the elastic insole described in claim 1, at least one of the raised support portions includes at least one groove extending toward the two adjacent lower support surfaces, wherein both ends of the groove extend to at least a portion of the two connecting surfaces on both sides of at least one of the raised support portions. For the elastic insole as described in claim 2, the length of an upper support formed by the connection between the two connecting surfaces and the upper support surface is less than the length of a lower support formed by the ends of the two connecting surfaces away from the upper support surface. The elastic insole as described in any one of claims 1 to 3 comprises three lower support surfaces arranged at intervals along the length direction, wherein two protruding support portions are arranged between two adjacent lower support surfaces. An elastic insole as described in any one of claim 1 to 3, wherein the elastic insole is arc-shaped along the length direction. The elastic insole as described in claim 4, wherein the elastic insole is arc-shaped along the length direction. The elastic insole as described in claim 5 is formed by impregnating a fiber material with a resin material and then forming the fiber material into an integral unit. A shoe midsole, comprising an elastic insole as described in any one of claims 1 to 9, wherein the elastic insole is embedded in a foam material.

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