JPH0141283Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Applicability>> The present invention relates to a sealed bag filled with gas. More specifically, the present invention relates to an airtight bag for keeping feet warm, which is characterized by applying pressure from the outside to cause the gas inside to flow, thereby causing the gas inside to act not only as a heat insulator but also as a heat generating element. .

<<Prior Art>> Various inventions have been made to keep feet warm in shoes for cold regions, slippers for winter, and the like. Many of these concerns the shape of shoes or slippers for heat retention, and they also use special materials, or use heating elements such as hand warmers or electric current to generate heat. It is built-in. However, if the heat retention effect is achieved only through the selection of materials, the shoes will be expensive, and there will be drawbacks such as making the footwear itself heavier. Moreover, the shape of the footwear becomes large, and especially when electric heating is used, there are disadvantages such as not only the cord getting in the way, but also the weight of the footwear being heavy, making it impossible to fully perform the function of the footwear.

《Problems to be solved by the invention》 Therefore, the first purpose of the invention is to eliminate the drawbacks of the conventional footwear, and to develop footwear that is lightweight and has sufficient foot warming effects. To provide an inexpensive foot warming bag that can be used as an insole.

A second object of the present invention is to provide a foot warming bag that can be used as an insole for indoor shoes without supplying any special energy other than energy during walking.

A third object of the present invention is to provide a foot warming bag suitable as an insole for boots or special footwear for cold regions.

《Means for solving the problem》 That is, the present invention is a bag filled with gas,
The tip of the bag is a rubber-like part 1 made of an elastic material that can be easily expanded, and the other part is a non-expandable part 3 that cannot expand beyond a certain volume. It is a sealed foot warming bag.

The present invention will be described in detail below with reference to the figures.

In FIG. 1, reference numeral 1 denotes an expandable rubber-like part, 3 a non-expandable part that can be compressed with a flat bag that does not substantially expand beyond a certain volume, and 2 a combination of the rubber-like part and the non-expandable part. It is a joint. these are,
It can be used as an insole for shoes or indoor shoes as it is, or it can be used as indoor shoes by adding a part that can be attached to the foot.

The non-inflatable part 3 is the part that contacts the sole of the foot and bears the weight of the foot, and its maximum volume is substantially constant and does not expand further. As the material, polyethylene, polypropylene, vinyl chloride, other sinterable polymers, etc. can be used. Furthermore, as will be described later, an elastic body such as rubber can also be used. As shown in FIG. 1b, when the non-inflatable part is stepped on with a foot, the gas therein is forced into the rubbery part 1, causing it to expand.

If no weight is applied, the rubber-like part contracts and most of the gas inside returns to the non-inflatable part 3 (see Figure 1a).

That is, the energy applied by stepping on the foot causes the gas inside to flow, and this flow generates frictional heat. Even if the amount of heat generated by one footstep is extremely small, repeated footsteps can contribute to the foot temperature. In other words, the gas inside the foot warming body not only has a heat retention effect to prevent body heat from escaping to the outside, but also produces a heating effect by converting part of the energy of stepping into frictional heat, resulting in a pronounced foot warming effect. becomes.

Furthermore, as shown in Figure 2, when the rubber-like part is bent upward at an acute angle, the expanded rubber presses against the toes and insteps of the feet, creating a pine surge effect, which improves blood circulation to the toes. The foot warming effect can be further enhanced.

In addition, in order to increase the heat generation effect due to the flow of gas, unevenness may be provided on the inner wall of the non-expandable portion (Fig. 3), and the joint portion between the rubber-like portion and the non-expandable portion 3 (the reference numeral in the figure) may be provided. The flow resistance of the gas (represented by 2) may be increased. For the latter method, for example, as shown in Fig.
In the figure, it may be a set of (represented by reference numeral 4). Furthermore, it is also effective to fill the inside of the non-expandable portion 3 with a breathable substance (represented by reference numeral 5 in FIG. 5). (Fig. 5) That is, if the flow resistance of the gas is increased and the gas is forced to flow (by stepping on the foot), the amount of heat generated will increase accordingly.

Such breathable materials can be arbitrarily selected from sponges, sponges, synthetic resin foams, nonwoven fabrics, glass fibers, metal fibers, etc., or mixtures thereof.

The method for making such a foot warming bag is first to make a sealed bag by attaching a so-called "belly button", which is a block of rubber, to the inside of the rubber-like part 1, like a soft-ball tennis ball, and then attaching the "belly button". The second method is to insert a needle into the ball and inject air into it, like a tennis ball.
There is a method in which a sealed bag containing a certain amount of a substance that generates gas by thermal decomposition, such as ammonium carbonate or sodium bicarbonate, is prepared, and then the substance is decomposed by heating to generate gas.

Furthermore, an air inlet may be provided as in a swim bladder, or a valve may be provided as in a tire tube. These cases are preferable because the amount of gas to be pressurized can be easily adjusted.

Each part that makes up the airtight bag (numerals 1, 2, 3 in the figure)
) may be made of the same rubber-like material, but the parts 2 and 3 must be substantially prevented from expanding beyond a certain volume. Therefore, the wall thickness of the parts 2 and 3 in the figure should be made sufficiently thicker than that of the part 1, or the parts 2 and 3 should be made of non-stretchable cloth or sheet. It is necessary to wear them. Therefore, the non-expandable portion 3 of the present invention also includes a case in which a cloth or sheet is used in combination to substantially prevent expansion beyond a certain volume, as described above. As mentioned above, when the entire bag for enclosing gas is made of the same material, it is particularly preferable because the airtight bag can be easily molded in one piece. Code 1 and 3
If the parts are made of different materials, a joint 2 is required. As for the material of the joint part 2,
Wood, hard rubber, plastic, metal, etc. can be used, and metal coated with cloth, plastic, rubber, etc. may also be used.

If the airtight bag is made in the shape of a shoe insole in this manner, it will exert a foot warming effect when used as a shoe insole.

Moreover, if it is stored inside indoor shoes, it becomes indoor shoes.

In particular, in the case of the shape shown in FIG. 2, it is effective not only for the sole temperature of the foot, but also for the foot temperature of the toe and instep.

[Brief explanation of the drawing]

FIGS. 1 and 2 are examples of sectional views a and b and plan view c of the foot warming bag of the present invention. In the figure, reference numeral 1 is an inflatable rubber-like part, reference numeral 3 is a non-expandable part, and reference numeral 2 is a joint part between the rubber-like part and the non-expandable part. FIG. 3 shows an example of a cross section of the inner wall of the non-inflatable portion 3, and FIG. 4 shows an example of a cross section of the joint portion 2.
This is an example, and reference numeral 4 in the figure indicates a thin tube. Figure 5 shows
A breathable material (numeral 5 in the figure) is placed inside the non-inflatable part 3.
FIG. 2 is a cross-sectional view of the non-expandable portion when filled with FIG. 6 shows an example of the foot warming bag of the present invention used in slippers. In this figure, the foot warming bag is made entirely of a rubber-like material and is built into the slipper. code 1
is an inflatable part of the sealed foot warming bag according to the present invention;
6 is the carapace of the slipper, 7 is the bottom surface of the slipper,
Reference numeral 8 indicates the back surface of the bottom of the slipper, and 9 indicates a fabric or sheet inside the upper of the slipper, which has a space between it and the upper of the slipper 6 so that the rubber-like portion 1 can expand. Reference numeral 10 represents an air inlet into the airtight bag, and 11 represents a stopper thereof. Figure 7 shows
This shows the case where the air in the sealed bag is forced into the rubber-like part 1 by actually applying body weight. Each symbol in FIG. 7 is the same as in FIG. 6.

Claims (1)

[Claims for Utility Model Registration] 1. A bag filled with gas, the tip of which is made of an elastic material that can be easily expanded. 1.
and a non-expandable portion 3 in which other portions cannot substantially expand beyond a certain volume.
A sealed foot warming bag that is characterized by: 2. The airtight foot warming bag described in claim (1) for utility model registration, in which the expandable rubber-like part is bent at an acute angle at the top. 3. A utility model in which an expandable rubbery portion 1 and a non-expandable portion 3 are connected by a joint 2 through which gas can pass, and the flow resistance of internal gas is increased at the joint 2. The airtight foot warming bag described in the scope of registration claim (1). 4 Non-inflatable portion 3 to prevent gas flow
The airtight foot warming bag described in claim (1) for utility model registration, which has unevenness on its inner wall. 5. The airtight foot warming bag according to claim (1) for utility model registration, which includes a breathable packing inside the non-inflatable portion 3.