WO2010062039A2 - Cushion unit for shoe, and shoe comprising the same - Google Patents

Abstract

The present invention relates to a cushion unit for a shoe, capable of suppressing fatigue, protecting joints, and the like during walking. The first member of the present invention forms at least a portion of a shoe sole, has a bottom surface with one or more grooves formed into a predetermined depth, and is made of an elastic material. The second member of the present invention is inserted into the groove, has a length projected downwardly from the bottom surface of the first member, and is made of an elastic material having an elastic modulus lower than that of the first member. The second member has a bottom surface on which a wear-resistant plate is installed. When the shoe sole contacts the ground, the second member is compressed to absorb impact.

Description

Cushion unit for shoes and shoes having the same

The present invention relates to a cushion unit for shoes, and more particularly, is provided with a cushion unit for shoes and attached to the bottom of the shoe is configured to absorb the impact when landing to reduce the fatigue of walking and protect the body from impact It is about shoes.

Shoes start from the basic function of protecting the foot when a person walks, and recently, various types of functions having the function of reducing fatigue, such as protecting the joint and the foot from the impact of landing. It's coming out.

The most common type of shoe, as shown in Figure 1, the upper (1) to wrap around and protect the side and upper portions of the foot, and the sole attached to the bottom of the upper (1) to protect the bottom of the foot (3) ) Is configured. The upper 1 is made of fabric or leather, etc., and has a shape corresponding to the side and top portions of the foot to protect the foot. And the sole (3) is made of synthetic resin or the like to contact the ground when walking to protect the soles.

In addition to such general shoes, the cushion member 2 is interposed between the upper 1 and the sole 3 to absorb shocks from the ground caused by self-weight when walking. . The cushion member 2 is formed to have the same shape as the sole 3, and is generally made of a material having mainly elasticity such as foamed polyurethane or elastic rubber.

Here, the cushion member 2 must satisfy various conditions. For example, when the cushion member 2 is formed of a material having high elastic strain, such as urethane or rubber, there is an advantage in that the impact during walking can be smoothly eliminated. However, the cushion member (2) using a good elastic material is not only poor wear resistance, but also deformation such as torsion of the shoe can be easily generated by the fatigue load of repeated elastic deformation. In addition, such a cushion member (2) is difficult to balance the body when stopping or walking, causing an overload of the muscles, thereby acting as a disadvantage that substantially increases the fatigue of walking. On the other hand, when the elasticity of the cushioning member 2 is insufficient, the shock during walking is transmitted to the human body as it is, and thus there is a problem such as an increase in overall fatigue and a bad joint.

And according to another conventional technology, for example, Korean Utility Model Registration Application No. 1986-0007583, in order to increase the shock absorbency of the shoes, the rear end of the sole 3, which is most impacted when walking, is double Various configurations have been proposed in which a structure is taken and a plurality of rod-shaped elastic bodies are provided therebetween. However, according to such a conventional technology, since the structure is substantially complicated, the manufacturing cost increases as a result of the increase of the material cost and the increase of the assembly process due to the increase of the components. In addition, there is a problem such that the rod-shaped elastic body is left in place due to long-term use, which is considered to be a significant problem in practical use.

In addition, there have been proposed various types of techniques for imparting elasticity to shoes by embedding an elastic body such as a coil spring, a leaf spring, or an air bag between the sole 3 of the dual structure, but the manufacturing cost due to the complicated structure It does not solve the problem of difficulty of raising and commercialization.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and has as its main object to provide a cushion unit for shoes and a shoe that can most efficiently absorb a shock during walking. In addition, the present invention can provide a shoe cushion unit and a shoe that can minimize the rise in material cost and simplify the manufacturing process by realizing a simpler structure, thereby substantially minimizing the rise in manufacturing cost. It is aimed.

Such an object of the present invention means that by substantially absorbing the impact of self-weight during walking, it is possible to minimize the fatigue while protecting a part of the body such as a joint even in long-term use. And it can be said that even long-term use can provide a shoe that can suppress the deformation of the shoe itself.

As a cushion unit for shoes in contact with the ground when walking; A first member which forms at least a portion of the shoe sole, is formed with one or more grooves having a predetermined depth on a bottom thereof, and is made of a material having elastic force; And at least one second member attached to a groove of the first member and having a length protruding downwardly from the bottom of the first member, the second member being made of a material having a lower elastic modulus than the first member. It is characterized by. According to such a cushion unit, the second member absorbs the walking impact while being compressed in contact with the ground.

In addition, the shoe cushion unit according to the embodiment is configured to further include a wear-resistant plate is attached to the bottom surface of the second member and molded of a wear-resistant material. The wear resistant plate protects the second member, which is relatively fragile.

According to another embodiment, a predetermined interval is formed between the inner circumference of the groove and the outer circumference of the second member, and a free space is formed inside the groove to absorb the elastic deformation of the first member. This allows more smooth shock absorption by allowing the elastically deformed volume to be absorbed in the free space according to the material of the second member.

In the shoe cushion unit according to another embodiment, the inlet of the groove is formed wider than its ceiling surface.

According to yet another embodiment, the first member and the second member are formed of a synthetic resin material. The second member may be formed of thermoplastic polyurethane, and it is preferable to use a thermoplastic polyurethane based on polyesterpolyol and 1.5-naphthylene diisocyanate.

According to another embodiment, the groove and the second member of the first member is formed to have a circular cross section. Alternatively, an embodiment in which the groove and the second member of the first member have a ring-shaped cross section is also disclosed.

According to yet another embodiment, when the second member is compressed to have the same bottom as the first member, the second member is designed to have an elastic modulus less than or equal to the initial elastic modulus of the first member.

The present invention discloses shoes or high heel shoes having a cushion unit as described above.

According to the shoe cushion unit or shoes according to the present invention as described above, it can be seen that the impact on the body due to its own weight when walking can be minimized. This can be expected to substantially protect the parts of the body, such as joints and feet that can occur by walking for a long time and at the same time can be expected to minimize the fatigue during walking. In addition, since the shoe according to the present invention has an appropriate impact absorbing force and an appropriate elastic restoring force, it can be said that the effect of suppressing deformation as much as possible even in long-term use can be expected.

1 is a perspective view showing a typical shoe.

Figure 2 is a longitudinal sectional view of the cushion unit according to an embodiment of the present invention.

3 is a cross-sectional view of a cushion unit according to an embodiment of the present invention.

Figure 4 is a longitudinal sectional view of a cushion unit according to another embodiment of the present invention.

5 is a cross-sectional view of a cushion unit according to another embodiment of the present invention.

Figure 6 is a longitudinal cross-sectional view of a cushion unit according to another embodiment of the present invention.

Figure 7 is a longitudinal cross-sectional view of a cushion unit according to another embodiment of the present invention.

8 is a bottom view of a shoe showing an example in which the cushion unit of the embodiment of the present invention is applied.

9 is an exemplary view showing another embodiment of the present invention.

10 is a cross sectional view of the cushion unit of the embodiment shown in FIG. 9;

Next, an embodiment of the present invention shown in the drawings will be described in more detail.

2 is a longitudinal cross-sectional view of the cushion unit according to the first embodiment of the present invention, Figure 3 is a cross-sectional view of the cushion unit according to the first embodiment. As shown, the cushion unit according to the present invention includes a first member 10 forming the sole of the shoe, and a second member 20 attached to the first member 10.

The first member 10 has a shape corresponding to the bottom of the shoe by forming the bottom of the shoe, that is, the sole, which contacts the ground when the user walks. And the first member 10 is made of a synthetic resin material having elasticity. In addition, a groove 12 having a predetermined depth is formed on the bottom of the first member 10. Here, the first member 10 may form the entire sole of the shoe, or may form a part of the sole.

The second member 20 made of a material having elasticity is fixed to the groove 12 of the first member 10. The second member 20 is fixed in the groove 12 by its upper surface being fixed to the ceiling surface 14 of the groove 12 of the first member 10. And the second member 20 has a height greater than the depth of the groove 12 of the first member 10, when lowered to the lower surface of the first member 10 when fixed to the groove 12 It is installed to protrude.

In the embodiment shown in FIG. 2, although the second member 20 is bonded to and fixed to the ceiling surface 14 of the groove 12, a separate groove is formed on the ceiling surface 14 of the groove 12. It is also possible to form a second member 20 is accommodated in the groove is fixed or bonded. 2 and 3, it can be seen that the groove 12 has a free space in a state in which the second member 20 is accommodated. That is, a predetermined interval is provided between the inner circumference of the groove 12 and the outer circumferential surface of the second member 20, and the clearance is formed as a whole by this interval. The free space of the groove 12 is to accommodate the volume when the elastic deformation of the second member 20.

The first member 10 and the second member 20 is formed of an elastic body having a predetermined elastic force, the second member 20 should have a lower elastic modulus than the first member (10). The low modulus of elasticity means that the elastic modulus can be elastically deformed by a force smaller than that of the first member 10. The moment when the second member 20 of the cushion unit of the present invention contacts the ground during walking, The two members 20 will first cause elastic deformation. In addition, that the first member 10 and the second member 20 has an elastic force means that the elastic member has sufficient elastic restoring force to be restored to its original state after the reaction force is removed after the elastic deformation caused by the reaction force generated when landing. do. In addition, the first member 10 and the second member 20 has an elastic restoring force can be said to have the same meaning as having the ability to absorb the impact while being deformed by the reaction force generated during landing.

The first member 10 may be generally formed of a synthetic resin forming the sole of the shoe, which means that the first member 10 also has a constant elastic force to protect the foot. The first member 10 may be formed of leather, such as leather, even if it is not synthetic resin. And the second member 20 is made of a material having a smaller elastic modulus than the first member 10, that is, elastically deformed with a smaller force than the first member 10, and restored to its original form when the external force is removed. It may be selected from materials such as rubber, polyurethane, latex or sponge, for example.

In addition, the first member 10 and the second member 20 may be made of a synthetic resin material of the same material as the main component, in this case, the second member 20 has a modulus of elasticity compared to the first member 10. Should be low. That is, even if it is a synthetic resin having the same main component, it is well known that the elastic modulus can be changed according to the component ratio or additive, so that the first member 10 and the second member 20, respectively, the elastic modulus Can be sufficiently carried out by using synthetic resin materials of different materials.

The first member 10 and the second member 20, respectively, natural rubber, styrene butadiene rubber (styrene butadiene rubber), chloroprene rubber, butadiene rubber (butadiene rubber), butyl rubber ( It is also possible to form a rubber material such as butyl rubber), urethane rubber such as polyester urethane or polyether urethane. In addition, the first member 10 and the second member 20 may be formed of a synthetic resin material as described above.

That is, the first member 10 and the second member 20 may be selected from the same rubber or synthetic resin material, or may be selected from different materials, but the first member 10 is the second member It should be selected as the material having high modulus of elasticity compared to (20).

In the case of molding the second member with a synthetic resin material, for example, the second member 20 is preferably made of thermoplastic polyurethane, which is marketed under the trade name Cellasto. It is a synthetic resin material based on polyesterpolyol) and 1.5-naphthylene diisocyannate. It is recognized as excellent elasticity and wear resistance. This has the advantage that the compression rate according to the load is only about 20% in the case of rubber, while the compression rate is about 75% in the case of CELLASTOR MH-24-35 (density 35). In addition, abrasion resistance has excellent wear resistance of only 0.6% wear compared to 20% wear of rubber under the same conditions (for example, when rubbed at a speed of 8 mm / sec on a metal plate). Only shown, it is particularly preferable as a material of the second member 20.

2 and 3, the second member 20 has a length that protrudes a predetermined length below the groove 12 formed in the first member 10. Here, when the second member 20 is compressed to have the same height as the depth of the groove, when an external force is further applied, the first member 10 is elastically deformed as well.

As described above, the second member 20 is formed inside the groove 12 by providing a predetermined interval between the inner circumferential surface of the groove 12 formed in the first member 10 and the outer circumferential surface of the second member 20. Also has a predetermined free space. Such a clearance may accommodate a volume change during elastic deformation of the second member 20.

The shape of the groove 12 formed in the first member 10 may be formed differently according to the material of the second member 20. For example, if the volume of the second member 20 is reduced in the compression direction only when the second member 20 is compressed, a separate space is not required between the groove 12 and the second member 20. It may be. However, if the second member 20 is formed of a material (for example, rubber or sponge) in which a radial volume increases when the second member 20 is compressed, the groove 12 and the second member ( 20) There should be a certain gap between them.

And another embodiment of the present invention is shown in FIGS. 4 and 5. According to this embodiment, the bottom surface of the first member 30 is formed with a ring-shaped groove 32, the second member 40 is formed into a cylindrical shape, the ring shape of the bottom surface of the first member 30 It fits in the groove | channel 32 of this and is being fixed. In the present embodiment, the second member 20 should have a lower elastic modulus than the first member 10, and the ring-shaped second member 40 is larger than the depth of the groove 32. Since it has a height, it must be assembled to protrude to the bottom of the first member (10). In addition, also in the present embodiment, the material that can be used as the first member 10 and the second member 20 is as described above. According to this embodiment, since the second member 20 is formed in a ring shape, it is expected that the shoe can provide a more stable support when it comes in contact with the ground.

6 shows another embodiment of the present invention. In the present embodiment, the groove 52 formed in the bottom surface of the first member 50 is formed to have a wider inlet than the ceiling surface thereof, and thus has a trapezoidal longitudinal section as a whole. It is formed. And the upper surface of the second member 60 may be formed to have the same shape or dimensions as the ceiling surface of the groove 52, or may be formed slightly smaller than that. The second member 60 is fixed to the ceiling surface of the groove 52 by adhesion or the like. Also in this embodiment, the second member 60 should have a lower elastic modulus than the first member 50, and the second member 60 has a length at which a lower end thereof protrudes from the bottom of the first member 50. Should have

Here, if the upper surface of the second member 60 and the ceiling surface of the groove 52 are formed to be the same, the upper surface of the second member 60 can be accurately fitted to the ceiling surface of the groove 52, As a result, the assembly process is expected to be very convenient. And in the state as shown in Figure 6 (a), when the second member (20b) is in contact with the ground, the volume is changed while being compressed, the volume is increased as shown in (b), It can be accommodated inside the conical groove 12b.

Figure 7 shows another embodiment of the present invention. As shown, the cushion unit for shoes according to the present invention, the first member 70 having a groove 72 formed on the bottom surface, the second member 80 attached to the groove 72, and the second It comprises a wear-resistant plate 82 attached to the bottom of the member 80.

As in the above-described embodiment, the second member 80 is formed of a material having a lower elastic modulus than the first member 70. Since the second member 80 has a height greater than the depth of the groove 72, the second member 80 protrudes more than the bottom of the first member 70 when mounted. The wear resistant plate 82 attached to the bottom surface of the second member 80 is formed of a material having high wear resistance to prevent abrasion of the second member 80.

Since the second member 80 has a relatively low elastic modulus as compared to the first member 70, the second member 80 may actually be weak to wear. Therefore, in order to reinforce the weak point of the second member 80, the wear resistant plate 82 formed of a material having excellent wear resistance is attached to the bottom surface of the second member 80. For example, when the second member 80 uses a sponge or urethane foam, the wear resistant plate 82 may be made of thermoplastic polyurethane or raw rubber having a relatively high wear resistance. Alternatively, the wear resistant plate 82 may be made of the same material as the first member 70.

As described above, the first member and the second member may be made in various ways. For example, an assembly in which the first member and the second member are combined may be made by insert injection, in which the first member is injected while the second member is inserted. In addition, by separately molding the first member and the second member, and by adhering the second member to the groove of the first member, the assembly in which the first member and the second member are combined may be made.

The bottom of the shoe provided with the cushion unit according to the embodiment of the present invention as described above is illustrated in FIG. In the illustrated embodiment, the first members 10, 30, 50, 70 form the entirety of the shoe sole. However, the first member 10, 30, 50, 70 does not form the sole of the shoe, it is natural that it is possible to form a part.

A plurality of second members 20, 40, 60, and 80 are attached to the first members 10, 30, 50, and 70, and the second member is the first member 10 as described above. It is fixed while being inserted into the grooves (12, 32, 52, 72) formed in the, 30, 50, 70. In the illustrated embodiment, the second members 20, 40, 60, and 80 according to various embodiments as described above are provided together with the first member, but this is exemplary. It will be possible to selectively implement the particular type of the first member (10, 30, 50, 70) of the various types of the second member as described above. As shown in the drawing, a plurality of second members 20, 40, 60, and 80 may be provided for the entire area of the first members 10, 30, 50, and 70, but only a part of the second members may be provided. It is also possible to install. For example, a plurality of the second members 20, 40, 60, and 80 may be provided only at portions corresponding to the heel of the first members 10, 30, 50, and 70.

In the illustrated embodiment, the above-described second members 20, 40, 60, and 80 are molded so that the longitudinal cross-section is entirely circular, but is not limited thereto. Of course, the shape of the second member (20, 40, 60, 80) can be changed according to the shape of the shoe or the portion to be installed. For example, it will be apparent that the second member may be formed in various shapes such as an ellipse, a triangle or a square with each corner portion rounded. When the second member is molded in various forms as described above, the groove formed in the first member should be able to accommodate the second member. In addition, the groove formed in the first member should be molded to accommodate the elastic deformation of the second member.

Next, the embodiment shown in FIGS. 9 and 10 will be described. This embodiment is applied to the heel 90 of women's high heels. As shown, the first member 92 is attached to the bottom surface of the heel 90. The first member 92 has a groove 94 opened toward the bottom surface. The groove 94 is provided with a second member 96. The first member 92 has a higher modulus of elasticity than the second member 96, and the second member 96 has a length protruding downward from the groove 94. In addition, the inner periphery of the groove 94 and the outer periphery of the second member 96 at regular intervals are configured to sufficiently accommodate the second member 96 that is elastically deformed. A wear resistant plate 96 is attached to the bottom of the second member 96 to protect the second member 96 made of a relatively soft material from abrasion.

When using a shoe equipped with a cushion unit according to the present invention having the above configuration, the second member is able to absorb the shock of the landing moment while being contracted at the moment of landing. This shock absorption will occur in the process of shrinking the second member to the same surface as the first member. In particular, by intensively placing the second member on the heel portion of the foot to which the user's load is most applied even in general shoes such as high heels, the impact can be sufficiently made during walking, thereby preventing damage to the joint due to fatigue load. Will be able to protect. In addition, in the present embodiment, it is also possible to expect the effect of reducing the noise generated by the contact with the ground during walking by the second member.

Within the scope of the basic technical spirit of the present invention as described above, it will be obvious that various modifications are possible for a person skilled in the art, and the present invention is protected by the scope of the appended claims. It is obvious that it must be decided.

It can be seen that the cushion unit according to the present invention as described above can protect a part of the human body such as a joint by minimizing an impact during walking. The cushion unit of the present invention may be applied to the entire shoe, such as walking or running shoes, general shoes, women's high heels, and the like.

Claims (14)

As a cushion unit for shoes in contact with the ground when walking; A first member which forms at least a portion of the shoe sole, is formed with one or more grooves having a predetermined depth on a bottom thereof, and is made of a material having elastic force; At least one second member attached to each of the grooves of the first member, protruding downward from the bottom surface of the first member, made of a material having a lower elastic modulus than the first member A cushion unit for shoes configured. The shoe cushion unit of claim 1, further comprising a wear resistant plate attached to a bottom surface of the second member and formed of a wear resistant material. The shoe cushion of claim 1, wherein a predetermined space is formed between an inner circumference of the groove and an outer circumference of the second member, and a space for absorbing elastic deformation of the first member is formed in the groove. Unit. The shoe cushion unit of claim 1, wherein the inlet of the groove is formed to have an area greater than or equal to the ceiling surface of the groove. The cushion unit for shoes according to any one of claims 1 to 4, wherein the first member and the second member are formed of a synthetic resin material. The shoe cushion unit according to any one of claims 1 to 4, wherein the first member and the second member are molded of a rubber material. 6. The cushion unit for shoes according to claim 5, wherein the second member is thermoplastic polyurethane. 7. The cushion unit for shoes of claim 6, wherein the second member is a thermoplastic polyurethane based on polyesterpolyol and 1.5-naphthylene diisocyanate. 6. The cushion unit for shoes according to claim 5, wherein the groove and the second member of the first member have a circular cross section. 6. The cushion unit for shoes according to claim 5, wherein the groove and the second member of the first member have a ring-shaped cross section. 6. The cushion unit for shoes according to claim 5, wherein when the second member is compressed to have the same bottom as the first member, the second member has an elastic modulus less than or equal to the initial elastic modulus of the first member. The shoe cushion unit according to any one of claims 1 to 4, wherein the first member is molded of a synthetic resin material, and the second member is molded of a rubber material. A shoe comprising the cushion unit for shoes according to claim 1. High heel shoes provided with the shoe cushion unit of Claims 1-12 in a heel.

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