JPH08308606A - Footwear which absorbs shock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the shock to the foot as a whole by applying a predetermined pressure to the fluid material in an interior bag assembly of the insole. SOLUTION: A pressured interior bag 10 of the heel is placed in the heel area of a removable insole of a walking shoe, of which the heel is generally hit by a force less than the force it is hit by in running. The interior bag 10 is preferably made of polyurethane film and the like and filled with viscous or foamy material such as oil based gel, but it is not gaseous material, which can endure a pressure of 5 pound/square thou. The pressured front sole interior bag 11 is used to absorb shocks for people who take part in sports such as tennis of which shock is less but focused on the front sole portion. In order to prevent the arise of gaps on the insole made of the ethylene vinylacetate, profiles are drawn around the interior bags 10, 11. An arched support 13 may be arranged between the two interior bags 10, 11, if so desired.

Description

Detailed Description of the Invention

The present invention relates to shock absorbing inserts for reducing impact on footwear and feet.

Many inventions have been devised over the years to reduce the impact on the foot. However, prior art advances in cushion systems have also had many drawbacks. In use to date, there are many deformations in the inner bag filled with liquid that helps absorb shock. Generally, these systems rely on the weight of the user to massage the foot, support the foot, or cushion the foot against shock. These structures are not without advantage, of course, but they all allow the foot to come into contact with the force it is trying to relax in some way.

Recent improvements to shoes include pressurized air bladders, gel-filled packs, chambered heel and forefoot units, spring-like units and new polymers. Includes assortment and is designed to reduce shock shocks. However, pressurized air or gas systems tend to leak through the bladder membrane over time, thus reducing overall performance. The pressurized air or gas is rapidly displaced when an external force is exerted on a portion of the bladder to reduce shock absorption in the required area.

The pressurized air or gas system relies entirely on the elasticity of the membrane to determine the properties of the cushion. Also, pressurized air or gas systems are inherently unstable, allowing excessive movement in response to shock. Gas is removed instantaneously from underneath the area of highest impact. Air or gas also expands and contracts considerably when exposed to changes in temperature, reducing its effect due to changes in climate.

Gel packs, whether viscous or foamy gels, reduce the compression of the central part of the sole of the foot when compared to previously used materials. However, sports such as running exert an impact force exceeding five times the weight of the runner, and such a gel pack cannot sufficiently cope with the extreme stress created by vigorous exercise. As with air, these gel systems are also removed from the area needed for cushioning.

Chambered systems have created a system that relies entirely on the weight of the wearer to strengthen the cushion. Since the making of the chamber cannot be made to the wearer's order, the users at each end of the recommended weight scale will not be able to take advantage of the promoted properties of the product and In the case of heavy users, nothing is left again between their foot and the point of impact.

In addition to the above systems, several self-regulating systems have been suggested for use in footwear. Such adjustable systems are attractive on paper but impractical and must be discarded. The process of education for the end user creates endless potential mistakes in filling and correct pressurization of the chamber for individual needs. The cost of the material to fill or refill alone renders most of these systems uneconomical. Also, in some designs, the valve creates a relief means for the fill material and creates another potential area of failure during use.

The present invention addresses all the deficiencies found in existing systems for damping foot impact. One or more of the structures of the present invention are placed under the foot to respond to any force applied to the foot. A single sealed bladder is placed directly under the heel with a more elastic bladder containing a higher pressure non-gaseous filling material to allow the user's heel to contact even under extreme conditions Keep not to. Highly pressured, less elastic, sealed inner bladders have been used to reduce excessive pronation of the foot, but a common problem has occurred with a large number of competitors.

A highly elastic bladder and a medium of low pressure (5
From 10 pounds per square inch) to a minority of users who do not pronate too much (do not rotate inward to fully absorb shock) or even those who rotate sideways and supination, Another sealed bladder can be placed inside the foot.

In the present invention, a pressurized or compressed sealed bladder is placed in the area of the impact force under the foot to absorb the shock and stabilize the foot in the correct gate pattern. The present invention preferably uses a non-gaseous material at a pressure of 5 pounds per square inch or more, which is less mobile than air or gas and therefore is not as easily removed from impact forces as air or gas. . Because these materials are complex molecules that require large pores in the membrane to leak through the membrane, gas is less likely to leak than it can leak through the membrane. In the present invention, a material having resistance to temperature change and expansion and contraction accompanying it is used.

Although a pressurized bladder may be placed anywhere between the foot and the point of shock or pressure to reduce the extra shock, FIG. 1 shows the area of the heel of the footwear and the area of the forefoot. It shows placing a pressurized inner bag. After pressurization, the inner bladder 10 of the heel is placed in the removable heel region of the insole. Such a placement method is generally used for walking shoes in which the force for hitting the heel is not so great during running. This bladder is preferably made of a polyurethane or elastomeric coating and is filled with a viscous or foamy non-gaseous material such as oil or silicone based gels that can be pressurized to more than 5 poins / sq. There is.

The pressurized inner pouch 11 of the forefoot provides a shock for those who participate in exercises such as low-impact aerobics, tennis, racquetball, and bench aerobics that concentrate the shock on the forefoot part of the shoe. Used to absorb. An insole made of ethyl vinyl acetate (EVA) is contoured around inner bladders 10, 11 to avoid creating gaps. If desired, an arched support 13 can be placed between the two inner bags.

As an alternative, the structure of the inner bag for the entire middle sole is shown in FIG.
Is disclosed in. The complete bladder 14 replaces the midsole of the shoe, thus completely eliminating the problem of midsole compression. The upper part 16 of the shoe can be mounted directly on the complete bladder 14.

As depicted in FIG. 3, the complete bladder of the disclosed construction may have a high density central portion 17 and a low density portion 18 occupying the remainder of the sole. Many people have problems with their striking patterns so they rotate their feet excessively inward. Place the partition in the inner bag,
By filling the two parts shown with different pressures, the movement of the foot can be controlled. The high pressure bladder portion 17 effectively keeps the foot rolling along the correct path.

The mid-sole inner bladder shown in FIG. 3 can be provided with an opposite pressurizing portion having a low pressure on the inside to correct the problem of lack of pronation.

FIG. 4 is similar to that shown in FIG. 3, but shows the structure of a complete bladder that occupies the inner bladder portion 17 and the inner bladder portion 18 which occupies the rest of the sole. A fluffed outer sole 19 is shown with a shoe upper 20 and a heel tab 21.

While the present invention has been described and illustrated herein with reference to preferred embodiments, it is understood that the scope of the invention as defined by the appended claims includes substantial equivalents of the alternative embodiments. It is what is done.

[Brief description of drawings]

FIG. 1 is a cross-sectional bottom plan view of an insole having a pressurized inner bladder of the heel and an inner bladder of the forefoot.

FIG. 2 is a side perspective view of the insole showing a complete inner shoe inner bag.

FIG. 3 is a cross-sectional bottom plan view of an insole having a complete midsole inner bag divided into parts.

4 is an elevational cross-sectional view of the rear of the shoe shown in FIG.

[Explanation of symbols]

 10 Inner pouch on rear heel 11 Inner pouch on forefoot part 12 Insole 13 Insole 13 Arched support 14 Complete inner pouch 16 Upper part of shoe 17 Inner / high pressure inner pouch part 18 Low density part 19 Outer sole 20 Of shoe Top 21 heel tab

Claims (7)

[Claims] 1. In shock-absorbing footwear: an outer sole, an upper part of the shoe attached to the outer sole, a rear heel region, an intermediate region and a forefoot region. A combination of at least one inner shoe sole having: and at least one sealed bladder arranged on the at least one inner shoe sole, wherein the sealed inner bladder is a non-gaseous fluid A shock-absorbing footwear, characterized in that the material is pressed into at least about 5 pounds per square inch and contained in a bladder. 2. A shock-absorbing footwear as defined in claim 1, wherein the sealed inner bag is located in the heel region of the inner sole of the shoe. . 3. The shock-absorbing footwear defined in claim 1, wherein the sealed inner bag is located in the forefoot region of the shoe sole. 4. The shock-absorbing footwear defined in claim 1, wherein the sealed inner bag is disposed in an intermediate region of a shoe sole. 5. The shock-absorbing footwear defined in claim 1, wherein the sealed inner bag includes an inner sole of the entire shoe. 6. The shock absorbing footwear defined in claim 1, wherein the pressurized material of the non-gaseous fluid is a silicon-based gel. 7. The shock absorbing footwear defined in claim 1, wherein the pressurized material of the non-gaseous fluid is an oil-based gel.