WO2006031003A1

WO2006031003A1 - Shoe structure for absorbing impact with light weight

Info

Publication number: WO2006031003A1
Application number: PCT/KR2005/000004
Authority: WO
Inventors: Ho Kyun Cheon
Original assignee: Ssamzie Co., Ltd
Priority date: 2004-09-17
Filing date: 2005-01-03
Publication date: 2006-03-23
Also published as: KR200370218Y1; JP3109634U; CN2812624Y

Abstract

The present invention discloses a lightweight shoe structure capable of absorbing impact, which includes a lightweight midsole for absorbing impact and an outsole having an inner sole part having a number of lattices with an impact-absorbing function. The shoe structure for absorbing impact with light weight includes the outsole having a number of lattices and hollows with impact-absorbing functions at different hardness and the lightweight midsole, thereby making the shoe lightweight and sufficiently absorbing impact without applying burden to a wearer's waist and ankle.

Description

SHOE STRUCTURE FOR ABSORBING IMPACT WITH LIGHT

WEIGHT

Technical Field

[1] The present invention relates to shoes for absorbing impact, and more particularly, to a lightweight shoe structure capable of absorbing impact, which includes a lightweight midsole for absorbing impact and an outsole having an inner sole part having a number of lattices with an impact-absorbing function.

Background Art

[2] Recently, shoes of various kinds with various designs have been manufactured according to improvement of the standard of living and consumers' demands, and lots of special shoes, such as height-increasing shoes, have been manufactured. The height- increasing shoe includes the bottom part and the upper associated with the upper portion of the bottom part. Furthermore, the bottom part of the shoe is divided into an outsole and a midsole. Here, the outsole is made of rubber material having an abrasion resistance and a slid-preventing function. The midsole is made of synthetic resin material formed in such a way as that polyurethane, polyvinylchloride or ethylene vinyl acetate is foam-molded.

[3] Meanwhile, in the height-increasing shoes, to realize the height-increasing function, the midsole has a number of lattices or rib structures with various hardness.

[4] However, such shoe structure considers only the increase of height through molding of a number of the lattices according to sizes and shapes of height-increasing shoes, but makes light of molding of the midsole having a number of lattices with an impact absorbing function. In other words, since the height-increasing shoe is to increase hardness for maintaining a wearer's height and to provide the height-increasing function, it has limits in increase of weight according to the wearer's heights and in buffering effects. Therefore, because the height-increasing shoe does not consider the increase of the weight of the shoe due to the size of the shoe and buffering due to elasticity of the outsole, it may overstrain a wearer's waist during walking or stopping. Disclosure of Invention Technical Problem

[5] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a shoe structure for absorbing impact with light weight, which includes an outsole having a number of lattices and hollows with impact-absorbing functions at different hardness and a lightweight midsole, thereby making the shoe lightweight and sufficiently absorbing impact without applying burden to a wearer's waist and ankle. Technical Solution

[6] According to a first aspect of the present invention, the shoe structure for absorbing impact with light weight includes an outsole (10) having an anti-abrasive outer surface (110) and a foamable inner sole part (12), and a midsole (20) inserted into the inner surface of an upper (30) of the shoe and seated on the upper portion of the outsole 10, wherein the midsole (20) includes a lower foam (22) adhered with bond, an upper fabric layer (24) and a middle layer (25) interposed between the lower foam (22) and the upper fabric layer (24), the inner sole part (12) of the outsole (10) includes a number of lattices (14) and air cushion hollows (14a) formed by the lattices (14), and a portion of the inner sole part (12) of the outsole (10) touching with the heel portion has at least one concave space (220), and thereby, the concave space (220) and the air cushion hollows (14a) formed in the toe portion of the inner sole part (12) serve to provide the impact-absorbing function and to keep the elasticity.

[7] The air cushion hollows (14a) are a number of rectangles formed by the lattices

(14).

[8] The midsole (20) includes a number of recesses (26) formed in the lower foam (22).

Advantageous Effects

[9] According to the lightweight shoe structure capable of absorbing impact using the lightweight midsole for absorbing impact and the outsole having the outer surface with the rounded portion, the present device can provide various impact-absorbing functions at different hardness and be lightweight by freely changing the number and ar¬ rangement method of compartments of the lattices and the hardness of the lattices. Ad¬ ditionally, the midsole for inserting into the inner surface of the upper of the shoe is easily attached to and detached from the inner surface of the upper. Brief Description of the Drawings

[10] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which:

[11] FIG. 1 is an exploded perspective view showing a shoe for absorbing impact with light weight according to a preferred embodiment of the present device;

[12] FIG. 2 is a view showing an inner sole part of an outsole of the shoe shown in FIG. l; [13] FIG. 3 is a view showing a bottom surface of the inner sole part of the outsole shown in FIG. 1 ; and [14] FIG. 4 is a side sectional view that the outsole of FIG. 1 is seen from a side.

Best Mode for Carrying Out the Invention [15] The present invention will now be described in detail in connection with preferred embodiments with reference to the accompanying drawings. In the drawings, like components are indicated by like reference numerals even though they are shown in different drawings. Furthermore, in describing the present device, if it is judged that detailed description of related prior arts or detailed description of constitutions of the present device may make the subject matters of the present device indefinite, they will be omitted.

[16] In a shoe structure according to the present device, an outsole 10 and a midsole 20 for absorbing impact with light weight respectively have fixed sizes and shapes. However, the outsole 10 for absorbing impact with light weight may be freely changed in its color and hardness according to an arrangement method of a number of lattices 14. In this embodiment, an athletic shoe is adopted, and structures of an inner sole part 12 of an outsole 10 and the midsole 20 of the athletic shoe capable of absorbing impact with more light weight will be described.

[17] FIGS. 1 to 4 show the structures of the inner sole part 12 of the outsole 10 and the midsole 20 for absorbing impact with light weight according to the embodiment of the present device. Referring to the drawings, the athletic shoe 100 for realizing a height- increasing shoe includes the impact-absorbing outsole 10 having an anti-abrasive outer surface and the foamable inner sole part 12, and the midsole 20 inserted into the inner surface of an upper 30 and seated on the upper surface of the outsole 10. In the athletic shoe 100, the midsole 20 is inserted into the inner surface of an upper 30 and seated on the upper surface of the outsole 10.

[18] In more detail, the midsole 20 includes an upper fabric layer 24, a lower foam 22, and a middle layer 25 interposed between the upper fabric layer 24 and the lower foam 22, and they are combined one another.

[19] In the midsole 20, the lower foam 22 is integrated with the middle layer 25. To provide an effect that a small person looks like a tall person, a detachable auxiliary sole (not shown) of a predetermined height may be attached to the rear portion of the midsole 20. Furthermore, the detachable auxiliary sole can control a wearer's height since it can be combined with or separated from the lower foam 22. In other words, when the midsole 20 is inserted into the inner surface of the upper 30, it can be easily inserted into the upper 30 by the detachable auxiliary sole.

[20] Moreover, the upper fabric layer 24 and the lower foam 22 of the midsole 20 are adhered with each other by means of an adhesive. The lower foam 22 and the upper fabric layer 24 are touched to each other to form the same surface, and the lower foam 22 touching with the inner sole part 12 includes at least one buffering recess 26.

[21] The midsole 20 is made of various synthetic materials. In more detail, the lower foam 22 is made of one of polyurethane, polyvinyl chloride, and EVA (Ethylene Vinyl Acetate), the middle layer is made of EVA, and the upper fabric layer 24 is made of mesh nylon fabric.

[22] The midsole 25 has the hardness of 60-70% to prevent transformation due to local load of a plastic material surface. The plastic material with the hardness of 60-70% can provide a proper cushiony force for providing the wearer's knees and waist with comfort during walking.

[23] Preferably, the middle layer 25 is made of one of high density compression sponge,

EVA sponge, P.U.L polyurethane and so on, and has at least two ventilation holes 252 and 254 of different sizes in order to provide the air and to make the shoe lightweight. The ventilation holes 252 and 254 may take various shapes, such as a circle, an oval or others.

[24] The lower foam 22 has the recess 26, and the inner periphery of the recess 26 is f ormed in such a way that the midsole 20 keeps a predetermined interval from the bottom surface of a groove portion 220 and maintains its elasticity.

[25] The upper fabric layer 24 adhered on the upper portion of the midsole 20 and made of fabric with good air permeability and sweat absorption is to prevent movement of the wearer's foot.

[26] When the wearer wears the height-increasing shoes after inserting the detachable auxiliary sole, the lower foam 22 of the midsole 20 capable of controlling height according to the wearer's desire can reduce the wearer's fatigue by dispersing the wearer's load since the wearer's heels are seated on the insole surface of the shoes due to the wearer's body weight. If the wearer wants to seem tall, when he or she uses the midsole 20 of the wanted height, he or she seems tall and can walk in comfort.

[27] As shown in FIG. 2, the inner sole part 12 of the outsole 10 of the athletic shoe 100 includes lattices 14 of various forms and air cushion hollows 14a. At this time, the lattice 14 is a rectangular lattice of a rib form in order to disperse impact and weight applied above the shoe in various directions.

[28] In the athletic shoe 100 according to this embodiment of the present device, the lattice 14 is in the form of a rectangular lattice, but it would be appreciated that the lattice may be varied in size and form and have various impact-absorbing functions at different hardness.

[29] The air cushion hollows 14a is in the form of a rectangle, and formed by the lattices

14, and by the lattices 14, the outward forms of the air cushion hollows 14a are made in such a ways as to make the midsole 20 lightweight and to provide the various impact-absorbing functions.

[30] Moreover, the lattices 14 and the air cushion hollows 14a of the inner sole part 12 of the outsole 10 provide the impact-absorbing function and the weight-dispersing function not only at the toe portion but also at the heel portion. In addition, a portion of the inner sole part 12 of the outsole 10 touching with the heel portion has at least one concave space 220 in order to reduce the weight of the shoe. Furthermore, in the inner sole part 12, the concave space 220 and the air cushion hollows 14a formed in the toe portion of the inner sole part 12 serve to provide the impact-absorbing function and to keep the elasticity.

[31] Referring to FIG. 3, the outer surface of the outsole 10 includes an elongated horizontal ridge 15 with a number of small waves, and vertically curved portions 16 and 116 which are relatively large. A slip preventing portion 18 is formed on the rear part of the horizontal ridge 15 formed on the heel portion of the outsole 10 so as to prevent slip of the outsole 10.

[32] FIG. 4 is a side sectional view that the outsole of FIG. 1 is seen from a side.

[33] Referring to FIG. 4, the middle portion of the heel portion of the outsole 10 is a round shape curved in the form of an arch, and at this time, the vertical height(h) from the ground to the outer surface of the outsole 10 is about 10mm to 30mm. Such round shape disperses the movement of the center of weight during walking, thereby providing convenience and safety in wearing.

[34] As described above, the inner sole part 12 of the lightweight outsole 10 for absorbing impact is fixed in its size and shape. However, it would be appreciated that the inner sole part 12 of the lightweight outsole 10 for absorbing impact may be freely changed according to the arrangement method of the lattices 14 with different hardness.

Industrial Applicability

[35] As described above, the present device can provide various impact-absorbing functions at different hardness and be lightweight by freely changing the number and arrangement method of compartments of the lattices and the hardness of the lattices.

[36] While the present invention has been described with reference to the particular il¬ lustrative embodiment, it is not to be restricted by the embodiment but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

Claims

[1] A shoe structure absorbing impact with light weight, which includes an outsole

(10) having an anti-abrasive outer surface and a foamable inner sole part (12), and a midsole (20) inserted into the inner surface of an upper (30) of the shoe and seated on the upper portion of the outsole 10, wherein the midsole (20) includes a lower foam (22) adhered with bond, an upper fabric layer (24) and a middle layer (25) interposed between the lower foam (22) and the upper fabric layer (24), the inner sole part (12) of the outsole (10) includes lattices (14) and air cushion hollows (14a) formed by the lattices (14), and a portion of the inner sole part (12) of the outsole (10) touching with the heel portion has at least one concave space (220), and thereby, the concave space (220) and the air cushion hollows (14a) formed in the toe portion of the inner sole part (12) serve to provide the impact-absorbing function and to keep the elasticity.

[2] The shoe structure according to claim 1, wherein the hollows (14a) are a number of rectangles formed by the lattices (14).

[3] The shoe structure according to claim 1, wherein the midsole (20) includes recesses (26) formed in the lower foam (22).

[4] The shoe structure according to claim 1, wherein the lower foam (22) includes a detachable auxiliary sole.

[5] The shoe structure according to claim 1, wherein the middle layer (25) has hardness of 60-70%.

[6] The shoe structure according to claim 1, wherein the middle layer (25) includes at least two ventilation holes (252, 254) of different sizes.