TW202315540A - A sole gasket - Google Patents

Abstract

A sole gasket is used to solve the problem that the conventional sole gasket is easy to cause the burden on the sole of the foot. Includes: at least one first layer body, the at least one first layer body has a front end and a rear end, the at least one first layer body has a forefoot, the forefoot adjacent to the front end, The ratio of the length of the forefoot to the full length of the at least one first layer body is 0.2-0.5; and a plurality of unidirectional fibers, the plurality of unidirectional fibers have a first extension direction and a second extension direction, and the first extension direction is perpendicular to the direction from the front end to the rear end, the second extending direction is parallel to the direction from the front end to the rear end, the plurality of unidirectional fibers in the first extending direction are located coaxially and side by side on the forefoot, and the plurality of unidirectional fibers in the second extending direction, located coaxially and juxtaposed between the forefoot and the rear end.

Description

sole gasket

The invention relates to a shoe sole gasket, especially a shoe sole gasket with fibers extending in different directions.

The soles are usually made of materials such as EVA or PU, and mainly play the role of shock absorption, buffering, propulsion feedback, and maintaining stability. The sole consists of a midsole and a large bottom. The large bottom is used to contact the ground. The midsole faces the inside of the shoe. The insole can be placed to accept the user's sole. The impact force generated when the wearer's sole lands can be determined by The midsole absorbs, cushions, and distributes shock for cushioning. Generally speaking, in order to make the shoes have better support and cushioning effects, a sole gasket with high mechanical strength is usually embedded in the sole when making shoes. In the midsole, or sandwiched between the midsole and the outsole.

Although the sole gasket provides better support and cushioning effect of the sole, when the wearer is walking or running, the wearer's feet must also exert additional force to make the sole gasket bend. In detail, when a person walks, the displacement of the foot can roughly be followed by the heel strike, the sole of the foot fully touching the ground, the heel lifting, and the forefoot leaving the ground. Especially in the process from the heel lifting to the forefoot leaving the ground, the bending range of the sole gasket is the largest, and the wearer's feet must exert greater force to bend the sole gasket, thus causing the sole of the sole to bend. burden.

In view of this, there is still a need to improve the known shoe sole pads.

In order to solve the above-mentioned problems, the object of the present invention is to provide a shoe sole pad which has better softness and is easy to bend.

Another object of the present invention is to provide a shoe sole gasket that can smoothly bend along with the bending movement of the sole of the foot.

Directionality or similar terms used throughout the present invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "side", etc., mainly refer to the directions of the attached drawings, and each direction or its approximate terms are only used to assist in explaining and understanding the various embodiments of the present invention, and are not intended to limit the present invention.

The elements and components described throughout the present invention use the quantifier "a" or "an" only for convenience and to provide the usual meaning of the scope of the present invention; in the present invention, it should be interpreted as including one or at least one, and singular The notion of also includes the plural unless it is obvious that it means otherwise.

Approximate terms such as "combination", "combination" or "assembly" mentioned throughout the present invention mainly include forms that can be separated without destroying the components after connection, or that the components cannot be separated after connection, etc., which are common knowledge in the art. One can be selected according to the material of the components to be connected or assembly requirements.

The sole gasket of the present invention comprises: at least one first layer body, the at least one first layer body has a front end and a rear end, the at least one first layer body has a front foot portion, and the front foot portion is adjacent to the front end , the ratio of the length of the forefoot to the total length of the at least one first layer is 0.2-0.5; and several unidirectional fibers, the several unidirectional fibers have a first extending direction and a second extending direction, the The first extension direction is perpendicular to the direction from the front end to the rear end, and the second extension direction is parallel to the direction from the front end to the rear end. Several unidirectional fibers in the first extension direction are coaxially located in the front foot portion. The second extension direction Several unidirectional fibers are coaxially located between the forefoot and the rear end.

Accordingly, in the shoe sole gasket of the present invention, the at least one first layer has several unidirectional fibers, and the several unidirectional fibers are juxtaposed in the first extending direction on the forefoot, and the first extending direction is approximately is perpendicular to the longitudinal direction of the sole gasket, and the several unidirectional fibers are located between the forefoot portion and the rear end along the second extending direction. In this way, the front part of the sole gasket can have good elastic deformation ability, and the sole gasket can follow the movement of the wearer's forefoot to present a good degree of bending. When the sole gasket is placed on the sole, It can achieve the effect of improving the wearer's comfort when walking.

Wherein, the surface area of the forefoot is 30-40% of the total surface area of the at least one first layer. As such, the forefoot portion may correspond to the function of the forefoot to toe position.

Wherein, the thickness of the at least one first layer is 0.05-0.25 mm. In this way, several first layers can be laminated to form the desired thickness.

Wherein, the several unidirectional fibers may be carbon fibers. In this way, the first layer can have the effect of high strength and light weight.

Wherein, the at least one first layer has a polymer material, and the polymer material is combined with the several unidirectional fibers. In this way, the polymer material and the unidirectional fibers can jointly form better structural strength.

Wherein, the polymer material can be thermoplastic. In this way, the several first layers can be bonded together by hot pressing to melt the polymer material.

The sole gasket of the present invention may further comprise at least one second layer, wherein the at least one second layer is stacked with the at least one first layer, and the at least one second layer has a front end and a rear end, And the at least one second layer has several unidirectional fibers juxtaposed, and the several unidirectional fibers of the at least one second layer extend from the front end of the at least one second layer to the first The back end of the two-layer body. In this way, the sole gasket can have better rigidity and bending resilience in the longitudinal direction.

Wherein, the number of the first layer can be four layers, and the number of the second layer can be one layer. In this way, the sole gasket can form a good softness effect by the several unidirectional fibers in the first extending direction of the four layers.

Wherein, the number of the first layer can be three layers, the number of the second layer can be two layers, and the three-layer first layer is located between the two second layers. In this way, the sole gasket can form better softness, and the sole gasket can also form a relatively high resilience in the longitudinal direction, so it can be applied to sports shoes.

The sole gasket of the present invention may further comprise at least one third layer, wherein the at least one third layer is stacked with the at least one first layer and the at least one second layer, and the at least one third layer The body has a front end and a rear end, and the at least one third layer body has several unidirectional fibers, the several unidirectional fibers of the at least one third layer body extend in the first extending direction, and the at least one third layer body Several unidirectional fibers of the layer are juxtaposed sequentially from the front end of the at least one third layer to the rear end of the at least one third layer. In this way, the third layer can further enhance the softness of the sole gasket.

Wherein, the number of the first layer body can be one layer, the number of the second layer body can be two layers, the number of the third layer body can be two layers, and the second layer body is stacked in sequence from top to bottom , the third layer, the first layer, the third layer and the second layer. In this way, the shoe sole gasket can further have the effect of different softness changes.

In order to make the above-mentioned and other objects, features and advantages of the present invention more clearly understood, the preferred embodiments of the present invention are specifically cited below, together with the attached drawings, for detailed description; in addition, the same symbols are used in different drawings Symbols are regarded as the same, and their descriptions will be omitted.

Please refer to Figure 1, which is the first embodiment of the shoe sole gasket of the present invention, which includes at least one first layer body 1, and the at least one first layer body 1 has several unidirectional fibers F (Unidirectional fiber) , the several unidirectional fibers F have a first extending direction D1 and a second extending direction D2, the first extending direction D1 is roughly the width direction of the sole pad, the second extending direction D2 is roughly the The longitudinal direction of the sole gasket, the first extending direction D1 and the second extending direction D2 are substantially perpendicular to each other.

The at least one first layer body 1 may have different shapes according to different types of shoes, and the at least one first layer body 1 may have a profile similar to the sole of a human foot. The at least one first layer 1 can be located between the outsole and the midsole of the shoe, or the at least one first layer 1 can be wrapped in the midsole when the midsole is injection molded. In addition, the sole gasket of the present invention can be a single-layer structure formed by a single first layer body 1, or can be stacked by several first layer bodies 1 to form a multi-layer structure and required thickness. limit.

Please continue referring to FIG. 1 , the at least one first layer 1 may be a sheet, and the thickness of the at least one first layer 1 may be 0.05-0.25 mm. In one embodiment, the thickness of the first layer body 1 can be adjusted to be thinner according to design requirements, such as 0.05 mm, 0.07 mm, 0.09 mm, 0.11 mm or 0.13 mm. In another embodiment, the thickness of the first layer body 1 can be adjusted to be thicker according to design requirements, such as 0.15 mm, 0.17 mm, 0.19 mm, 0.21 mm, 0.23 mm or 0.25 mm. For example, when the total thickness of the sole gasket is fixed, if the first layer 1 is relatively thin, more layers with different fiber directions can be stacked, and the combination can be changed a lot. However, in some cases, the combination of layers with different fiber directions does not need to be too many to meet the requirements of mass production, and thicker layers can also be used for stacking. By adjusting the thickness of the layers, the sole gasket of the present disclosure can have better design freedom.

The at least one first layer body 1 has a front end 11 and a rear end 12, and the front end 11 and the rear end 12 are roughly respectively the two ends of the at least one first layer body 1 in the longitudinal direction, so that the front end 11 to The direction of the rear end 12 is substantially the longitudinal direction. The front end 11 faces the toe, and the rear end 12 faces the heel. The at least one first layer body 1 has a front foot portion 13, the front foot portion 13 has a virtual boundary B, the virtual boundary B is substantially perpendicular to the longitudinal direction of the at least one first layer body 1, and the front foot portion 13 is adjacent to on the front end 11 so that the forefoot portion 13 can correspond to the position from the sole of the forefoot to the toes. The front foot portion 13 has a length L1 (that is, the length in the longitudinal direction from the front end 11 to the virtual boundary B), and the length L1 is the same as the full length L2 of the at least one first layer body 1 (that is, from the front end 11 to the virtual boundary B). The ratio of the length in the longitudinal direction of the rear end 12 is 0.2 to 0.5. In one embodiment, the ratio can be adjusted to 0.2, 0.3, 0.4 or 0.5 as required. Moreover, the front foot portion 13 has a surface area, which is 30-40% of the total surface area of the at least one first layer body 1 .

The plurality of unidirectional fibers F can be carbon fibers, so that the at least one first layer 1 can have high strength and light weight properties. The plurality of unidirectional fibers F can be combined with a polymer material to form the at least one first layer 1 , and the polymer material and the plurality of unidirectional fibers F can jointly form a better structural strength. The polymer material may be a thermoplastic, and the polymer material may include polycarbonate (Polycarbonate, PC), polyamide (Polyamide, PA) or thermoplastic polyurethane (Thermoplastic polyurethane, TPU). The plurality of unidirectional fibers F are coaxially located on the front foot portion 13 along the first extending direction D1 , and the first extending direction D1 is perpendicular to the direction from the front end 11 to the rear end 12 . In this way, the several unidirectional fibers F juxtaposed by the first extending direction D1 make the front foot portion 11 easy to bend and have better flexibility in the direction from the front end 11 to the rear end 12 .

In one embodiment, the first layer body 1 is a prepreg material (Prepreg), which is composed of a matrix (Matrix) and a reinforcement material (Reinforcement). It is the aforementioned unidirectional carbon fiber. The reinforcement part of the prepreg is only composed of carbon fibers in two directions, which are the carbon fibers in the first extending direction D1 and the carbon fibers in the second extending direction D2. The carbon fibers in the first extending direction D1 are located in the forefoot portion 13 , while the carbon fibers in the second extending direction D2 are located in the area outside the forefoot portion 13 .

The at least one first layer body 1 further has several unidirectional fibers F juxtaposed in the second extending direction D2, the second extending direction D2 is substantially perpendicular to the first extending direction D1, that is, the second extending direction D2 is substantially parallel to the direction from the front end 11 to the rear end 12 . The plurality of unidirectional fibers F extending in the second extending direction D2 are located between the virtual boundary B of the forefoot portion 13 and the rear end 12 . In this embodiment, one end of the plurality of unidirectional fibers F is adjacent to the virtual boundary B of the forefoot portion 13 , and the other end of the plurality of unidirectional fibers F extends to the rear end 12 . In this way, the several unidirectional fibers F juxtaposed by the second extending direction D2 can make the at least one first layer 1 have better rigidity and bending resilience in the direction from the front end 11 to the rear end 12 .

Please refer to Figures 2 and 4, which is an implementation of the second embodiment of the sole gasket of the present invention. Compared with the first embodiment, in this embodiment, the present invention may additionally include at least one second Layer 2. The sole gasket can be formed by laminating the at least one second layer 2 and the at least one first layer 1 , and the at least one second layer 2 has a similar outline shape and thickness to the at least one first layer 1 . The at least one second layer body 2 has a front end 21 and a rear end 22, the front end 21 and the rear end 22 are roughly the two ends in the longitudinal direction of the at least one second layer body 2 respectively, and the at least one second layer body 2 The layer body 2 has several unidirectional fibers F juxtaposed, and the several unidirectional fibers F can be combined with the above-mentioned polymer material to form the at least one second layer body 2 . The plurality of unidirectional fibers F generally extend from the front end 21 to the rear end 22 along the second extension direction D2. In one embodiment, the second layer 2 is a prepreg, and its reinforcement part is only composed of carbon fibers in one direction, that is, a plurality of carbon fibers in the second extending direction D2 extending from the front end 21 to the rear end 22 .

The at least one second layer body 2 and the at least one first layer body 1 can bond adjacent layers by heat and pressure, for example, melt bonding by polymer materials. In addition, the polymer materials of the at least one second layer body 2 and the at least one first layer body 1 can be the same, so that the polymer materials of adjacent layers have good bonding efficiency. Alternatively, the polymer materials of the at least one second layer body 2 and the at least one first layer body 1 can be different, so that different properties of the sole gasket can be formed to meet customized requirements.

The number and sequence of the at least one second layer body 2 and the at least one first layer body 1 are not limited by the present invention. For example: several second layer bodies 2 and several first layer bodies 1 can be stacked sequentially or alternately. In the embodiment shown in Fig. 4, one second layer body 2 and four first layer bodies 1 are laminated sequentially from top to bottom, that is, in the sole gasket, the position of the front foot portion 13 has four A layer of unidirectional fibers F in the first direction of extension D1, and a layer of unidirectional fibers F in the second direction of extension D2. In this way, the sole gasket has four layers of several unidirectional fibers F in the first extending direction D1 at the position of the forefoot portion 13, which can form good softness.

Also, please refer to the embodiment shown in Fig. 5, the lamination mode of the second layer body 2 and the first layer body 1 can be three layers of the first layer body 1 above and below each with a second layer body 2, or two of the second layer bodies 2 and three of the first layer bodies 1 are interlaced or stacked arbitrarily (not shown in the figure). That is, in the sole pad, the position of the forefoot portion 13 has three layers of several unidirectional fibers F in the first extending direction D1, and two layers of several unidirectional fibers F in the second extending direction D2. In this way, compared with the above-mentioned embodiment, the position of the forefoot portion 13 of the sole gasket has a higher proportion of several unidirectional fibers F in the second extending direction D2, and the sole gasket has a better longitudinal direction. Rigidity and bending resilience, that is, the sole gasket can not only form better softness through several unidirectional fibers F in the first extending direction D1 of the partial layer body, but also the sole gasket It forms relatively high resilience in the longitudinal direction, and can be applied to sports shoes.

Please refer to Figures 3 and 6, which are the third embodiment of the sole gasket of the present invention. Compared with the first or second embodiment, in this embodiment, at least one third layer 3 may be included, The at least one third layer 3 has a profile shape and thickness similar to that of the at least one first layer 1 and the at least one second layer 2 . The at least third layer body 3 has a front end 31 and a rear end 32, the front end 31 and the rear end 32 are roughly the two ends in the longitudinal direction of the at least one third layer body 3 respectively, and the at least one third layer body The body 3 has several unidirectional fibers F juxtaposed, and the several unidirectional fibers F can be combined with the above-mentioned polymer material to form the at least one third layer body 3, and the at least one third layer body 3 and the at least one first layer body The layer 1 or the at least one second layer 2 can have the same or different polymer materials. The plurality of unidirectional fibers F of the at least one third layer body 3 are paralleled in sequence from the front end 31 to the rear end 32 substantially along the first extending direction D1. In one embodiment, the third layer 3 is a prepreg, and its reinforcement part is only composed of carbon fibers in one direction, that is, a plurality of carbon fibers in the first extending direction D1 are juxtaposed from the front end 31 to the rear end 32 . The stacking quantity and order of the at least one third layer body 3 , the at least one second layer body 2 and the at least one first layer body 1 are not limited. For example: it is also possible to have any number of layers and any stacking order, so as to be staggered or sequentially stacked. In this embodiment, the sole gasket can be composed of one second layer 2, one third layer 3, one first layer 1, one third layer 3 and One of the second layer bodies 2 is stacked. That is, in the sole pad, the position of the forefoot portion 13 has three layers of several unidirectional fibers F in the first extending direction D1, and two layers of several unidirectional fibers F in the second extending direction D2. In this way, compared with the two implementations of the second embodiment, the sole gasket has two more layers of several unidirectional fibers F in the first extending direction D1 in other areas except the position of the forefoot portion 13 . In this way, the sole gasket of the third embodiment can further have different softness changes.

According to the above-mentioned embodiments, the shoe sole gasket of the present invention has at least one layer of several unidirectional fibers F in the first extending direction D1 and the second extending direction D2 (that is, the at least one first layer Body 1), so that the sole gasket can maintain good rigidity, but also has good softness. In addition, different stacking sequences of several layers (that is, the first layer 1 , the second layer 2 and the third layer 3 ) can be applied to shoes with different needs. In addition, the first layer body 1 , the second layer body 2 and the third layer body 3 have substantially equal contours, so there is no need to perform additional trimming after lamination to make the appearance consistent.

Please refer to FIG. 7, which is a schematic diagram of the shoe sole gasket applied to a shoe S of the present invention. In addition, as shown in Figure 8, the sole pads of the above-mentioned second embodiment (as shown in Figure 4, the stacking of four first layers 1 and one second layer 2) and the sole pads of a control group were respectively For the sheet (stack of five second-layer bodies 2), under the same force application, ABAQUS software was used to perform kinematics simulation to analyze its elastic strain and displacement. The upper part of Fig. 8 shows the simulation results of elastic strain, while the lower part shows the simulation results of displacement. It can be seen from the figure that the part with large elastic strain is mostly concentrated in the forefoot, and the part with large displacement is mostly concentrated in the toe area. With respect to elastic strain, in the foot 13 before the first embodiment, the maximum elastic strain value is 0.0026, while the control group is 0.0012, showing that the sole gasket comprising the at least one first layer body 1 has better Elastic deformation capacity. In addition, the displacement of the forefoot during the process of lifting the heel until the forefoot is off the ground through simulation can be known. When wearing the shoes with the sole gasket of the first embodiment above, the maximum displacement of the forefoot of the wearer can reach Compared with this, the maximum displacement of the forefoot of the control group was only 4.4mm, showing that the shoe sole gasket of the present invention can reduce the restriction on the lifting of the sole. In other words, during exercise, the sole gasket of the second embodiment not only produces a large strain at the bending point, but also promotes a large displacement of the insole elsewhere to further match the movement state of the forefoot.

To sum up, in the shoe sole gasket of the present invention, the at least one first layer has several unidirectional fibers, and the several unidirectional fibers are juxtaposed in the first extending direction on the forefoot, and the first extending The direction is substantially perpendicular to the longitudinal direction of the sole gasket, and the plurality of unidirectional fibers are located between the forefoot portion and the rear end along the second extending direction. In this way, the front part of the sole gasket can have good elastic deformation ability, and the sole gasket can follow the movement of the wearer's forefoot to present a good degree of bending. When the sole gasket is placed on the sole, It can achieve the effect of improving the wearer's comfort when walking. In addition, the shoe sole gasket of the present invention further comprises at least one second layer body, the second layer body has the several unidirectional fibers, and the several unidirectional fibers generally extend from the The front end of the second layer body extends to the rear end of the second layer body, which can achieve the effect of making the sole gasket have better rigidity and bending resilience in the longitudinal direction. In addition, the shoe sole gasket of the present invention further comprises at least one third layer body, the third layer body has the several unidirectional fibers, and the several unidirectional fibers are roughly formed in the first extending direction by The front end of the third layer is juxtaposed to the rear end of the third layer in sequence, which can achieve the effect of making the sole gasket have different softness changes.

Although the present invention has been disclosed by using the above-mentioned preferred embodiments, it is not intended to limit the present invention. It is still within the scope of this invention for anyone skilled in the art to make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. The technical scope protected by the invention, therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

1: the first layer 11,21,31: front end 12,22,32: backend 13: Forefoot 2: The second layer 3: The third layer F: Unidirectional fiber D1: first extension direction D2: Second extension direction L1: length L2: full length B: Boundary S: shoes

[Fig. 1] A plan view of a shoe sole gasket according to a first embodiment of the present invention. [Fig. 2] A plan view of the second layer of the sole gasket of the second embodiment of the present invention. [Fig. 3] A plan view of the third layer of the shoe sole gasket according to the third embodiment of the present invention. [Fig. 4] An exploded perspective view of one embodiment of the second embodiment of the present invention. [FIG. 5] An exploded perspective view of another embodiment of the second embodiment of the present invention. [Fig. 6] An exploded perspective view of a third embodiment of the present invention. [Fig. 7] A schematic diagram of the shoe sole gasket of the present invention used for shoe soles. [Fig. 8] The simulation analysis test diagram of the kinematics of the first embodiment of the sole gasket of the present invention and the control group.

1: the first layer

11: front end

12: Backend

13: Forefoot

F: Unidirectional fiber

D1: first extension direction

D2: Second extension direction

L1: length

L2: full length

B: Boundary

Claims (11)

A sole gasket comprising: At least one first layer, the at least one first layer has a front end and a rear end, the at least one first layer has a front foot, the front foot is adjacent to the front end, the length of the front foot is the same as the at least one The ratio of the overall length of the first layer is 0.2 to 0.5; and Several unidirectional fibers, the several unidirectional fibers have a first extending direction and a second extending direction, the first extending direction is perpendicular to the direction from the front end to the rear end, and the second extending direction is parallel to the direction from the front end to the rear end The several unidirectional fibers in the first extending direction are coaxially located on the forefoot, and the several unidirectional fibers in the second extending direction are coaxially located between the forefoot and the rear end. The shoe sole gasket according to claim 1, wherein the surface area of the forefoot is 30-40% of the total surface area of the at least one first layer. The shoe sole gasket according to claim 1, wherein the thickness of the at least one first layer is 0.05-0.25 mm. The shoe sole gasket as claimed in claim 1, wherein the several unidirectional fibers are carbon fibers. The shoe sole gasket as claimed in claim 1, wherein the at least one first layer has a polymer material, and the polymer material is combined with the plurality of unidirectional fibers. The shoe sole gasket as claimed in claim 1, wherein the polymer material is thermoplastic. The shoe sole gasket according to any one of claims 1 to 6, further comprising at least one second layer, wherein: The at least one second layer is stacked with the at least one first layer, and the at least one second layer has a front end and a rear end; and The at least one second layer has several unidirectional fibers juxtaposed, and the several unidirectional fibers of the at least one second layer extend from the front end of the at least one second layer to the second The backend of the layer body. The shoe sole gasket according to claim 7, wherein the number of the first layer is four layers, and the number of the second layer is one layer. The sole gasket of claim 7, wherein the number of the first layer is three layers, the number of the second layer is two layers, and the three-layer first layer is located between the two second layers . Such as the sole gasket of claim 7, further comprising at least one third layer, wherein: The at least one third layer is laminated with the at least one first layer and the at least one second layer, the at least one third layer has a front end and a rear end; and The at least one third layer body has several unidirectional fibers, the several unidirectional fibers of the at least one third layer body extend in the first extending direction, the several unidirectional fibers of the at least one third layer body are formed by the The front end of the at least one third layer is sequentially juxtaposed to the rear end of the at least one third layer. The shoe sole gasket as claimed in claim 10, wherein the number of the first layer is one layer, the number of the second layer is two layers, and the number of the third layer is two layers, and the order is from top to bottom The second layer body, the third layer body, the first layer body, the third layer body, and the second layer body are stacked.

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