JP3217793U - Air cushion - Google Patents

Abstract

To provide an air cushion that is easy to carry and that is comfortable to sit with a recessed central portion, is difficult to burst, and inexpensive. An air cushion main body 2 is formed by thermally bonding two flexible sheets 21 and 22 at a peripheral joint 23. The air supply / exhaust port 3 is inserted into one end of the joint 23 and fixed. Then, the spiral air passage 25 is formed by thermally bonding the upper and lower flexible sheets 21 and 22 along the spiral joining line 24 to the air cushion body 2 from one end of the joining portion 23 toward the center. To do. When air is blown from the air supply / exhaust port 3, an air cushion 1 having a high peripheral portion and a recessed central portion is obtained. When the air cushion 1 is folded in four, it can be stored in a pocket of clothes. [Selection] Figure 1

Description

The present invention relates to an air cushion, and more particularly to a portable air cushion used in place of a cushion.

An air cushion having an air blowing port in an air bag has been widely used. Since these air cushions use a single air bag, there is a drawback that the central portion is raised and it is difficult to sit down. Therefore, an air cushion has been proposed in which the central portion is recessed and easy to sit (see Utility Model Registration No. 3184893).

Utility Model Registration No. 3184893

The air cushion described in Japanese Utility Model Registration No. 3184893 has a ring-shaped inflatable inner cushion built in an inflatable outer cushion, and is used as a seating surface by appropriately denting the upper surface of the outer cushion. At the same time, it has been improved to improve the sitting comfort. Therefore, an air supply / exhaust valve is provided for each so that the air pressure of the outer cushion and the air pressure of the inner cushion can be adjusted independently.
According to this structure, two air bags and two air supply / exhaust valves are required, and the structure is complicated, resulting in a high manufacturing cost.

In order to solve the above-mentioned problem, the present invention aims to provide an inexpensive air cushion having a recessed central portion and a comfortable seating by simply providing one air bag and one air supply / exhaust valve. . Another object of the present invention is to provide a portable air cushion that can be folded and stored in a pocket of clothes.

The air cushion of the present invention comprises a cushion body formed by joining the outer periphery of two flexible sheets into a sealed bag shape, and an air supply / exhaust port on one side of the cushion body, and air is blown from the air supply / exhaust port to cushion In an air cushion used by inflating the main body, a spiral air passage extending from the air supply / exhaust port to the center of the cushion main body is formed by joining the inner surfaces of the two flexible sheets by a spiral joining line. It is characterized by. In addition, the flexible sheet can be used in any shape such as a square, a polygon, and a circle.

While the spiral air passage extends from the outer periphery to the central portion, its width is gradually narrowed, and an air supply / exhaust port is provided at the peripheral joint portion of the two flexible sheets at the starting point of the air passage. A check valve was provided to prevent the air blown into the air supply / exhaust port from flowing backward.

A straw for facilitating air blowing or discharging from the air supply / exhaust port was provided. And the straw storage pocket for accommodating a straw in the cushion main body was provided. This straw storage pocket was provided at the beginning of the spiral joining line.

The flexible sheet is preferably a thermoplastic synthetic resin film such as one selected from the group consisting of polyethylene, polyvinyl chloride, polyurethane, polyamide, polypropylene and silicone.

The cushion body can be folded and stored in a pocket of clothes, for example 40cm x
A size of about 40 cm is preferable.

The air cushion of the present invention comprises a cushion body formed by sealing the outer periphery of two flexible sheets into a sealed bag shape, and a supply / exhaust port on one side of the cushion body, and air is blown from the supply / exhaust port. In an air cushion that is used by inflating the cushion body, a spiral air passage extending from the air supply / exhaust port to the center of the cushion body is formed by joining the inner surfaces of the two flexible sheets with a spiral joining line. Since the spiral air passage is gradually narrowed from the outer periphery to the center, the outer periphery of the cushion body is the largest when the cushion body is inflated by blowing air from the air supply / exhaust port. It swells greatly, and as it goes to the center, it swells small, so if you sit down on this cushion, the center will be recessed, and it will have an effect of good sitting comfort

Furthermore, since the two flexible sheets are heat-bonded at the periphery and formed into a bag shape, when sitting on this air cushion, the external force concentrates on the peripheral heat-bonding part, and the air cushion is The air cushion of the present invention has a drawback of being easily ruptured, but the spiral air passage from the air supply / exhaust port to the center of the cushion body by joining the inner surfaces of the two flexible sheets by the spiral joining line Therefore, the pressure of the filling air due to the external force applied from above the air cushion is dispersed by this joining line, the external force applied to the thermal bonding part around the air cushion is weakened, and there is less risk of bursting from here .

Since the air supply / exhaust port is provided at the joint of the two flexible sheets at the start of the air passage, and the check valve is provided at the air supply / exhaust port, the blown air is prevented from flowing back and leaking from the air supply / exhaust port. it can.

Since the straw for facilitating the air blowing or exhausting of the air supply / exhaust port is provided,
In addition to facilitating blowing by the mouth, air can be easily discharged by using this straw when discharging air.

Since the straw storage pocket for storing the straw is provided in the cushion body, the straw can always be carried with the air cushion, and the labor for searching for the straw can be saved when supplying and exhausting air. Further, since the storage pocket is provided at the starting end of the spiral joining line, it does not get in the way when the air cushion is folded.

If the size of the air cushion of the present invention is tailored to about 40 cm × 40 cm, the air cushion can be folded and stored in a pocket of clothes.

The flexible sheet of the present invention is made of a thermoplastic synthetic resin film such as polyethylene, polyvinyl chloride, polyurethane, polyamide, polypropylene, and silicone, so that the two flexible sheets can be used as a spiral joining line. When joining along, it can be easily heat-bonded by a heating die or the like. Further, a decorative or reinforcing coating or a lamination sheet can be easily provided on the outer surface of the air cushion.

The perspective view which shows one Example of the air cushion of this invention. The top view of FIG. The longitudinal cross-sectional view by the AA line of FIG. The perspective view of an air supply / exhaust port. The top view which shows the other Example of the air cushion of this invention. The longitudinal cross-sectional view of the air supply / exhaust port of FIG. Sectional drawing of a straw pocket. The perspective view of a straw.

The air cushion of the present invention will be described in detail by the following examples.

FIG. 1 is a perspective view showing an embodiment of an air cushion 1 according to the present invention. Two upper flexible sheets 2 are shown in FIG.
1 and the lower surface flexible sheet 22 are thermally bonded at the peripheral joint portion 23 to form the air cushion main body 2, and simultaneously with the thermal bonding of the joint portion 23 with the air supply / exhaust port 3 inserted into one end of the joint portion 23. The air supply / exhaust port 3 is fixed.
Then, the upper and lower flexible sheets 21 and 22 are thermally bonded to the air cushion main body 2 from one end of the bonding portion 23 toward the center portion along the spiral bonding line 24 at the heat bonding surface 241 (FIG. 2). Thus, the spiral air passage 25 is formed.

FIG. 2 is a plan view of the air cushion 1, and the width of the air passage partitioned by the spiral joining line 24 is as follows.
As indicated by a, b, and c, the width decreases from the outer periphery toward the center.
Therefore, when air is blown into the air cushion body 2 from the air supply / exhaust port 3, the air cushion body 2 swells, and as shown in FIG. 3, an outer peripheral portion 251 and an intermediate portion 252 of the air passage 25.
The inner periphery 253 and its size are gradually reduced. Therefore, when the air cushion 1 is laid on a flat ground, the central portion 254 is recessed and it becomes easy to sit down.

FIG. 4 is a perspective view of the air supply / exhaust port. The air supply / exhaust port 3 is joined to a pipe-shaped air inlet 31 by covering a pipe 32 made of a thermoplastic synthetic resin, and both sides 331 and 332 of the hem 33 are connected to a heating adhesive And heat-bonded while heating. As a result, the skirt portion is deformed flat and constitutes a check valve 34. In FIG. 2, reference numeral 35 denotes a cover of the blowing port 31, which is integrally formed with an elastic material such as rubber together with the support piece 36.

FIG. 5 is a plan view of the air cushion of the second embodiment. The structure of the air cushion main body 2 is the same as that of the first embodiment, but the straw pocket 4 is provided at the start end of the spiral joining line 24. The straw 5 is inserted and held in the straw pocket 4. The straw 5 is connected to the inlet / outlet 3 of the inlet / outlet 3.
1 and push the check valve 34 open to facilitate air blowing. Further, in the case of exhaust, air can be easily discharged by inserting the straw 5 into the inlet 31 of the air supply / exhaust port 3 and pushing the check valve 34 open.

FIG. 6 shows the air supply / exhaust port 3 provided with the lid 35 of the air inlet 31 and the cover 37 for the straw 5. The lid 35 of the blowing port 31 has the same structure as the lid of the first embodiment, but the cover 37 for the straw 5 is attached to the tip of the support piece 38.
The pocket 4 for the straw 5 is pressed from the peripheral joint 23 at the starting point of the spiral joint line 24, wrapped by the thermal bonding surface 241 of the spiral joint line 24, and fixed by thermal bonding.

FIG. 7 shows the straw pocket 4 in which the straw 5 shown in FIG. 8 is inserted. A rubber cover 37 is attached to a rubber support piece 38 fixed to the pipe 31 of the air supply / exhaust port 3. The cover 37 is placed on the head of the straw 5 to cover the blowing port of the straw 5 and prevent the straw 5 from falling off. The tip 51 of the straw 5 is cut obliquely to facilitate the action of pushing the check valve 4 of the air supply / exhaust port 3 open.

DESCRIPTION OF SYMBOLS 1 Air cushion 2 Air cushion main body 21 Upper surface flexible sheet 22 Lower surface flexible sheet 23 Peripheral joining part 24 Spiral joining line 241 Thermal bonding surface 25 Spiral air passage 3 Supply / exhaust port 31 Blowing port 32 Thermoplastic synthetic resin pipe 34 Check valve 35 Lid 4 Straw pocket 5 Straw

Claims (9)

Air that is used by inflating the cushion body by blowing air from the air supply / exhaust port, with a cushion body made by sealing the outer periphery of two flexible sheets into a sealed bag and one side of the cushion body In the cushion, an air cushion characterized in that a spiral air passage extending from the air supply / exhaust port to the central portion of the cushion body is formed by joining the inner surfaces of the two flexible sheets by a spiral joining line. 2. The air cushion according to claim 1, wherein the spiral air passage is formed so that a width thereof is gradually narrowed from an outer periphery to a central portion. The air cushion according to claim 1, wherein a check valve is provided at the air supply / exhaust port. The air cushion according to claim 1, further comprising a straw for facilitating air blowing or exhausting from the air supply / exhaust port. The air cushion according to claim 4, wherein a pocket for storing straws is provided in the cushion body. 6. The air cushion according to claim 4, wherein the straw storage pocket is provided at a start end of the spiral joining line. The air cushion according to claim 1, wherein the flexible sheet is made of a thermoplastic synthetic resin film. The air cushion according to claim 7, wherein a material of the thermoplastic synthetic resin film is any one selected from the group consisting of polyethylene, polyvinyl chloride, polyurethane, polyamide, polypropylene, and silicone. The air cushion according to claim 1, wherein the cushion body is folded to a size that can be stored in a pocket of clothes.

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