JP2001072092A - Double tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely discharge a content, and at the same time, keep the original shape even after a usage by forming a tube of an external container and an internal container, and providing a valve, which sucks in air, between the external container and the internal container in a manner to come into contact with the internal container and the aperture section or the shoulder section. SOLUTION: For this double tube 1 constituted of an internal container 2 and an external container 3, a space 4 is formed between the internal container 2 and the external container 3. Then, air is made to flow into the space 4 through a valve 5 by an amount being equal to the reduced volume of the internal container 2, accompanying its usage. The air, which has flowed in once, is prevented from flowing out to the outside again by the valve 5. At the time of usage, when the external container 3 is pressed by fingers, the internal container 2 is pressed as well by utilizing the air, and a content is pushed out. Also, air is made to flow into the space 4 from the valve 5 by an amount being equal to the reduced volume of the internal container 2. Thus, the air is made to flow in accompanying the usage, and the residual amount can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double tube, and more particularly to a double tube which retains its original shape when used.

[0002]

2. Description of the Related Art A conventional tube has an unfavorable appearance because it is difficult to completely remove the contents and the shape of the tube is deformed as the tube is used.

[0003]

The present invention solves these problems, and provides a double tube capable of reducing the remaining amount of contents and maintaining the original shape after use. The purpose is to do so.

[0004]

Means for Solving the Problems The present invention relates to a double tube comprising an outer unit and an inner unit, between which a valve for sucking air is provided so as to abut on a bore or a shoulder of the inner unit. About.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The double tube of the present invention preferably has an outer unit having a restoring force, and is preferably a hard material. As the hard material, aluminum laminate, hard polyethylene, polypropylene, vinyl chloride and the like are preferable, and aluminum laminate and hard polyethylene are particularly preferable.

[0006] The outer tube of the double tube of the present invention is preferably transparent. Since the state of the inner unit can be observed by being transparent, it is possible to know how much the contents remain.

The transparent part may be the whole outer vessel, but it is particularly preferred that it is partial. By being partial, it is possible to prevent the deformation of the inner organ due to the decrease of the contents from being recognized.

The inner tube of the double tube of the present invention is preferably made of a soft material. As the soft material, soft polyethylene (LDPE), LLDPE, nylon, Evar resin and the like are preferable.
E), nylon is particularly preferred.

The inner tube of the double tube of the present invention is preferably thin. The double tube of the present invention has an outer unit outside the inner unit and is protected from the outside. Therefore, the inner unit can be made thinner,
The contents can be completely extruded, and the remaining amount can be reduced.

[0010] Between the outer unit and the inner unit, air flows in by a valve as the volume of the inner unit decreases with the use of the contents. Not to be.

As the valve, a conventionally used valve can be used, but a soft valve is particularly preferable so that air can easily enter between the inner unit and the outer unit due to a restoring force when squeezed.

The number of valves may be one, but may be more than one.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view of the double tube of the present invention, and FIG. 2 is a partial sectional view of the double tube. FIG. 1 shows an example of the double tube 1 according to the present invention, in which the dotted line represents the inner unit 2 and the elliptical shape represents the transparent part 6. As shown in FIG. 2, the double tube 1 includes an inner unit 2 and an outer unit 3, a space 4 is defined between the inner unit 2 and the outer unit 3, and the inner unit 2 is The outer unit 3 is made of a thin aluminum laminate having a hardness. Air is introduced into the space 4 through the valve 5 by an amount corresponding to the volume of the inner unit that has been reduced with use. The air once introduced cannot be flown out again by the valve 5. ing. Next, when the contents are used by pressing the outer unit with a finger for use, the inner unit 2 is pressed using air, the contents are pushed out, and the volume of the inner unit 2 is reduced. Air flows into the space 4 from the valve 5 by a reduced amount. As described above, air flows in with use, and the inner unit is pressed by using the air by pressing the outer unit, so that the remaining amount can be reduced. In addition, even when the outer unit is used, the outer shape is restored and the original shape is maintained, so that the appearance can be maintained without changing the appearance. Further, the amount of the contents can be known using the transparent portion 6.

[0014]

[Effects of the Invention] The double tube of the present invention pushes out the contents by utilizing the air between the outer unit and the inner unit, so that the contents can be used more efficiently than the conventional tube. Yes, the remaining amount can be reduced. In particular, when the inner unit is made of a thin soft material, the contents can be used almost completely. In addition, since the initial state can be maintained even after use, the appearance can be maintained. Further, since the valve is provided so as to abut on the bore or the shoulder of the inner unit, the inflow of air during use is efficiently performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a container of the present invention.

FIG. 2 is a partial sectional view of the present invention;

[Explanation of symbols]

 1 Double tube 2 Inner unit 3 Outer unit 4 Space 5 Valve 6 Transparent part

Claims (6)

[Claims] 1. A double tube comprising an outer unit and an inner unit, wherein a valve for sucking air is provided between the outer unit and the inner unit so as to abut on a bore or a shoulder of the inner unit. 2. The double tube according to claim 1, wherein the outer case is made of a hard material. 3. The double tube according to claim 1, wherein the outer case is transparent. 4. The double tube according to claim 1, wherein the outer case is partially transparent. 5. The double tube according to claim 1, wherein the inner unit is made of a soft material. 6. The double tube according to claim 1, wherein the inner tube is thin.