JPH0939992A - Liquid container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid container wherein the fitting of a cap on the container main body is easy, there is no liquid leakage occurring in the container main body, and there is no protuberance or a groove on the outer peripheral part of the mouth part of the container main body. SOLUTION: A liquid container consists of a container main body 1 with an opening part 21 of which the diameter is contracted, at the leading end part of a mouth part 2, and a cap 3. Then, for the cap 3, an internal core 4 is provided on the internal side. Then, on the internal core 4, a fitting part 41 which has an external diameter being approx. equal to the internal diameter of the opening part 21 and is fitted in the opening part 21, in the vicinity of the base part, a diameter expanded part 42 which is connected to the fitting part 41 and has an external diameter being larger than the external diameter of the fitting part 41, and a leading end part 43 of which the external surface is tapered toward the leading end, are provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid container.

[0002]

2. Description of the Related Art Conventionally, in a capped liquid container, the cap and the container body are fitted to each other as shown in FIGS. 8 and 9 in the outer periphery of the mouth 2 of the container body 1 and the inner periphery of the cap 3. One of them is provided with a projection and the other is provided with a groove, and the projection and the groove are fitted to each other (JP-A-53-53).
-89584 and Japanese Utility Model Laid-Open No. 59-26752).

Further, as shown in FIG. 10, an opening 21 having a reduced diameter is provided at the tip of the mouth 2 of the container body 1, while
The cap 3 has an inner core 4 protruding from the inside thereof, and the inner core 4 has a fitting portion 41 fitted into the opening 21 and an outer diameter larger than the outer diameter of the fitting portion at the tip. There is also proposed a liquid container in which the enlarged diameter portion 42 having the cap 3 is fitted into the opening 21 by the inner core 4 (see Japanese Utility Model Laid-Open No. 57-117343). .

[0004]

However, the above-mentioned liquid container obtained by fitting the protrusions and the grooves of the container body and the cap to each other, for example, when used as an enema container, has a mouth of the container body. When inserting the vicinity of the tip of the part into the human body, it is difficult to insert smoothly, which is not preferable. Further, the liquid container in which the container body and the cap are fitted by the cap inner core described above is effective in preventing the cap from falling out, but when the cap inner core is inserted into the opening, the expanded diameter part is obstructed. Therefore, there is a problem that it is difficult to insert the liquid, and it is difficult to prevent leakage of the content liquid in the liquid container because an excessive expansion force is applied to the opening.

The present invention solves the above-mentioned problems, and an object thereof is a liquid container comprising a container body and a cap, which can be easily attached to the container body, It is an object of the present invention to provide a liquid container which does not leak and has no protrusion or groove on the outer peripheral portion of the mouth of the container body.

[0006]

SUMMARY OF THE INVENTION The present invention is a liquid container comprising a container body having a reduced diameter opening at the tip of the mouth and a cap, the cap having an inner core protruding inside. The inner core has an outer diameter near the base of the inner core, the outer diameter being substantially equal to the inner diameter of the opening, and a fitting portion fitted into the opening, and the fitting portion connected to the fitting portion. The liquid container is characterized in that it is provided with a diameter-expanded portion having an outer diameter larger than the outer diameter and a tip portion whose outer surface is tapered toward the tip.

The present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view showing an example of the liquid container of the present invention.
The container body 1 has an opening 21 at the tip of the mouth 2 whose diameter is smaller than the inner diameter of the mouth 2, and a cap 3 is provided on the outer periphery of the mouth 2 of the container body 1. .

An inner core 4 is projectingly provided on the inner side of the cap 3, and the inner core 4 has an outer diameter near the base portion thereof which is substantially equal to the inner diameter of the opening 21. 21
Is provided with a fitting portion 41, and the fitting portion 41 is further provided.
To the distal end from the expanded diameter portion 42, which has a larger outer diameter than the fitting portion 41 and is connected to
A tip portion 43 whose outer surface is tapered toward the tip
Is provided, and the cap 3 is fitted into the opening 21 by the inner core 4.

The outer diameter of the enlarged diameter portion 42 needs to be larger than the outer diameter of the fitting portion 41, but it becomes larger when the cap 3 is applied to the mouth portion 2 of the container body 1. If it is too large, it becomes difficult for the expanded diameter portion 42 to pass through the opening 21. Therefore, it is preferable that the enlarged diameter portion 42 be able to pass through, and the maximum value thereof is substantially equal to the inner diameter of the mouth 2 of the container body 1.

FIG. 2 is a sectional view showing another example of the liquid container of the present invention. The container body 1 has an opening 21 at the tip of the mouth 2 whose diameter is smaller than the inner diameter of the mouth 2, and a cap 3 is provided on the outer periphery of the mouth 2 of the container body 1. .

An inner core 4 is provided on the inside of the cap 3 so as to project therefrom. The inner core 4 has an outer diameter near the base portion thereof and is substantially equal to the inner diameter of the opening 21. 21
Is provided with a fitting portion 41, and the fitting portion 41 is further provided.
To the distal end from the expanded diameter portion 42, which has a larger outer diameter than the fitting portion 41 and is connected to
A tip portion 43 whose outer surface is tapered toward the tip
Is provided, and the cap 3 is fitted into the opening 21 by the inner core 4.

In the case of this example, the above example is different from the above example in that a hollow portion 44 is formed in the inner core 4 and that the tip end portion 43 of the inner core 4 is closed and is not a sharp shape but an open shape. They are different. In the case of this example, since the tip end of the tip end portion 43 has an open shape, when the inner core 4 is fitted into the opening portion 21, the cap 3 is fitted smoothly even if some distortion is applied. The effect is that you can.

The shape of the container body 1 of the liquid container of the present invention is not particularly limited, and only the one having a uniform outer diameter from the mouth 2 to the bottom as shown in FIGS. 1 and 2. Instead, for example, it may have a shape having a bulge on the bottom as shown in FIG. 3 described later.

The present invention also includes a liquid container constructed by connecting containers having various shapes to the liquid container shown in FIGS. 1 and 2 excluding the bottom portion.

The material of the liquid container of the present invention is not particularly limited, but a thermoplastic resin is preferable because a material having some flexibility at the time of fitting is easier to operate and moldability at the time of manufacture. , For example, polyethylene is preferred.

The method for producing the liquid container of the present invention is not particularly limited, but it is produced, for example, by injection molding using a thermoplastic resin such as polyethylene.

In the method of using the liquid container of the present invention, after the liquid is put into the container body 1, the cap 3 is inserted into the opening 21 of the mouth 2 of the container body 1 from the tip 43 of the inner core 4. Then, the opening portion 21 is pushed in such a manner that the expanded diameter portion 42 pushes it open, and then the fitting portion 41 and the opening portion 21 are fitted to each other.

(Operation) The liquid container according to the present invention has the cap 3
The opening 21 of the mouth 2 of the container body 1 is fitted by the fitting portion 41 of the inner core 4 and the expanded diameter portion 42 is provided so as to be connected to the fitting portion 41. Even if the fitting between the portion 41 and the opening 21 is loosened to some extent,
Since the container is closed, the liquid in the container body 1 is unlikely to leak to the outside. In addition, since the tapered tip end portion 43 is provided at the tip end of the inner core 4, when the cap 3 is applied to the container body 1, an unreasonable expansion force is not applied, and even if it is stored for a long time, for example, a polymer Opening 21 due to the creep phenomenon that may occur in a polymeric material when a liquid container is manufactured from the material
And the leakage of the liquid in the container body 1 due to the expansion can be prevented.

[0019]

Next, embodiments of the present invention will be described. (Example 1) A polyethylene resin was used to manufacture a liquid container including a container body 1 shown in FIG. 3 and a cap 3 shown in FIG. 4 is a cross-sectional view showing a fitted state of the container body 1 and the cap 3 of the liquid container of the present invention. In addition, this liquid container contains glycerin and is used as an enema container. In FIG. 4, the inner diameter of the opening 21 is 2.7 mm, the outer diameter of the tip 431 of the tip 43 of the inner core is 1.6 mm, and the maximum outer diameter of the expanded diameter portion 42 is 3.2 mm.
The outer diameter of the fitting portion 41 was 3.0 mm.

(Comparative Example 1) A container body 1 similar to that of Example 1
And a cap 3 shown in FIG. 5 was manufactured. In this cap, the inner core 4 is not provided with the expanded diameter portion, but only the fitting portion 41 and the tip portion 43 are provided. 5 is a cross-sectional view showing the fitted state of the container body 1 and the cap 3 of the liquid container of Comparative Example 1. In FIG. 5, the inner diameter of the opening 21 is 2.7 mm, the outer diameter of the tip 431 of the tip 43 of the inner core is 1.6 mm, and the outer diameter of the fitting portion 41 is 3.2.
mm.

(Comparative Example 2) Container body 1 similar to that of Example 1
And a cap 3 shown in FIG. 6 was manufactured. In this cap, the inner core 4 is not provided with a tapered tip portion, but the enlarged diameter portion 42 is provided at the tip. 6 is a cross-sectional view showing a fitted state of the container body 1 and the cap 3 of the liquid container of Comparative Example 2. In FIG. 6, the inner diameter of the opening 21 was 2.7 mm, the maximum outer diameter of the expanded diameter portion 42 at the tip of the inner core was 3.5 mm, and the outer diameter of the fitting portion 41 was 3.2 mm.

Comparative Example 3 A container body 1 similar to that of Example 1
And a cap 3 shown in FIG. 7 was manufactured. In this cap, neither the enlarged diameter portion nor the tapered tip portion is provided on the inner core 4, and the inner core 4 is moved from the fitting portion 41 to the tip portion 4
It has a uniform outer diameter up to 3. Note that FIG.
FIG. 6 is a cross-sectional view showing a fitted state of the container body 1 and the cap 3 of the liquid container of Comparative Example 3. In FIG. 7, the opening 21
Has an inner diameter of 2.7 mm, the inner core fitting portion 41 and the tip portion 4
The outer diameter of 3 was 3.2 mm.

Performance Evaluation Leakage Test The liquid containers of Example 1 and Comparative Examples 1 to 3 are submerged in water while the container body is capped, and the spherical portion of the container body is pressed to leak air in the container body. Test whether air bubbles are generated on the water surface and evaluate the results according to the following criteria.
It was shown to. A: No bubbles were generated. ◯: Bubbles were generated when the spherical portion was pressed with a considerable force. B: Bubbles were generated even when the spherical surface was pressed with a little force.

Easiness of Attachment / Detachment of Caps After capping the container bodies of Example 1 and Comparative Examples 1 to 3, the caps were removed and the ease of attachment / detachment of the caps was tested, and the results were evaluated according to the following criteria. Indicated. ⊚: Can be easily attached and detached. ○: It was possible to put on and take off quite easily. Δ: A considerable amount of power was required for putting on and taking off. X: It could not be attached or detached unless strong force was applied.

[0025]

[Table 1]

[0026]

The structure of the present invention is as described above, and it is a liquid container comprising a container body and a cap, the cap can be easily attached to the container body, and the liquid in the container body does not leak. Further, it is possible to provide a liquid container having no protrusion or groove on the outer peripheral portion of the mouth of the container body.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a liquid container of the present invention.

FIG. 2 is a cross-sectional view showing another example of the liquid container of the present invention.

FIG. 3 is a partially cutaway side view showing the container body 1 of the liquid container according to the first embodiment.

FIG. 4 is a cross-sectional view showing a fitted state of the container body 1 and the cap 3 of the liquid container according to the first embodiment.

5 is a cross-sectional view showing a fitted state of the container body 1 and the cap 3 of the liquid container according to Comparative Example 1. FIG.

FIG. 6 is a cross-sectional view showing a fitted state of a container body 1 and a cap 3 of a liquid container according to Comparative Example 2.

FIG. 7 is a cross-sectional view showing a fitted state of a container body 1 and a cap 3 of a liquid container according to Comparative Example 3.

FIG. 8 is a cross-sectional view of a conventional liquid container.

FIG. 9 is a cross-sectional view of a conventional liquid container.

FIG. 10 is a cross-sectional view of a conventional liquid container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Mouth part 21 Opening part 3 Cap 4 Inner core 41 Fitting part 42 Expanding part 43 Tip part 44 Hollow part

Claims (1)

[Claims] 1. A liquid container comprising a container body having a reduced-diameter opening at the tip of the mouth, and a cap, the cap having an inner core projecting from the inner side thereof. Has an outer diameter approximately equal to the inner diameter of the opening near its base, and a fitting portion that fits into the opening, and an outer diameter that is connected to the fitting portion and is larger than the outer diameter of the fitting portion. And a tip end portion whose outer surface is tapered toward the tip.