JPH0834454A - Inner lid for container - Google Patents

Abstract

PURPOSE:To prevent an internal pressure from increasing when an inner lid is put on a container to secure sealability of the inner lid by forming a hollow swollen part which is elastically deformable near a center of a bottom of the inner lid for the container. CONSTITUTION:An elastically deformable swollen part 5 is formed near a center of a bottom 3 of an inner lid 1 for a container made of flexible plastic which exhibits a dishlike structure with the bottom and a peripheral wall 4 with a flange 2 around an outer periphery at the upper end. A wavy folded part 6 is circularly formed in the vicinity of an outer periphery of the bottom 3, while along an outer periphery of the peripheral wall 4, a circular protrusion 9 to be fitted into a circular recess 14 formed along an inner periphery of a mouth 13 of the container 11 is formed. When the inner lid 1 is to be put on the container 11, the lid 1 is pushed in with the swollen part 5 pushed down by a finger, thereby elastically deforming the swollen part 5 to exhaust air in the container 11 outside. When the finger is released after the inner lid 1 has been completely pushed in, the swollen part 5 restores to an original state to make inside the container at a reduced pressure, thereby realizing high sealability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container inner stopper for enhancing the airtightness of a container such as a glass bottle.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, a conventional container inner stopper 30 has a bottom portion 31 and a peripheral wall 32 that are dish-shaped, and a flange portion 33 is integrally formed on the outer periphery of the upper end.

[0003]

Since the conventional container inner stopper has the above-mentioned structure, when the inner stopper 30 is pushed into the mouth of the container, the air inside the container is compressed and the internal pressure increases, so that the inner stopper is closed. It means that they are always receiving the force of pushing upwards from the inside. Therefore, even with the outer lid, it is difficult to completely push in the inner plug, and it is difficult to bring the lower surface of the flange into close contact with the mouth of the container, which may impair the hermeticity. The present invention, by preventing the internal pressure from increasing when mounting the inner stopper to the container,
This was done to ensure the tightness of the inner stopper.

[0004]

SUMMARY OF THE INVENTION According to the present invention, an elastically deformable hollow raised portion is formed near the center of the bottom of a container inner plug having a dish shape and integrally formed with a flange portion on the outer periphery of the upper end. It is a characteristic container stopper.

[0005]

Since the container inner stopper of the present invention has the elastically deformable hollow raised portion, when the inner stopper is pushed into the mouth of the container by pushing down the raised portion with a finger, the raised portion is elastically deformed. The bulge is reduced and the air inside escapes to the outside. When the finger is removed from the raised part after the inner stopper is completely pushed in, the raised part returns to its original state, the inside of the container is in a depressurized state, and the inner stopper has a force that pushes down the inner stopper from above by external pressure. This works, and the lower surface of the flange is brought into close contact with the mouth of the container, and high sealing performance is realized.

If the raised portion can be deformed by pinching it from the left and right sides with the fingers, the same effect can be obtained even if the inside plug is attached to the container mouth while the raised portion is pinched with the finger and deformed. To be

When an annular folded portion is formed in the vicinity of the outer periphery of the bottom portion of the inside plug as in the embodiment described later, elastic deformation of the raised portion is facilitated and the above-mentioned effect can be enhanced.
Further, the inner plug can be made of a material having a relatively high hardness.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. 1 is a cross-sectional view of a container inner stopper 1 according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a cross-sectional view in a state where a raised portion 5 is deformed, and FIG. is there.

The container inner stopper 1 is made of soft plastic,
As shown in FIG. 1, the bottom portion 3 and the peripheral wall 4 form a dish, and the flange portion 2 is integrally formed on the outer periphery of the upper end. An elastically deformable raised portion 5 is formed near the center of the bottom portion 3.
The raised portion 5 is thin and hollow, and the internal space communicates with the inside of the container. A corrugated folded portion 6 is formed in an annular shape near the outer periphery of the bottom portion 3. Therefore, a groove 7 is formed between the folded portion 6 and the peripheral wall 4. Perimeter wall 4
As shown in FIG. 4, an annular convex portion 9 that fits into an annular concave portion 14 formed on the inner periphery of the mouth portion 13 of the container 11 is formed on the outer periphery of the container 11.

When the inner stopper 1 is attached to the container, the elastically deformable hollow raised portion 5 is pushed down by a finger as shown in FIG. The part is elastically deformed, the bulge is reduced, and the air inside the container escapes to the outside. At this time, the raised portion 5 is easily elastically deformed by the action of the folded portion 6. When the finger is released from the raised portion after the inner stopper 1 is completely pushed in, the raised portion returns to the original state, the inside of the container is in a decompressed state, and the inner stopper 1 is pushed down by the external pressure. Power will work. Further, when the outer lid 12 is put on, as shown in FIG. 4, the lower surface of the flange portion 2 of the inner plug 1 is completely adhered to the upper surface of the mouth portion of the container 11, and the peripheral wall 4
The annular convex portion 9 is fitted into the annular concave portion 14 of the container 11 to realize high hermeticity.

When removing the inner plug 1 from the container, the projecting piece 8
Remove by picking with your fingers. At this time, if the raised portion 5 is lightly pressed, it can be easily removed. The notch 10 formed in the projecting piece 8 is provided for convenience of die cutting when manufacturing the inner plug.

FIG. 5 shows a container stopper 2 according to another embodiment of the present invention.
0 is a sectional view, and FIG. 6 is a top view. Raised part 2 of inner plug 20
1 is elongated as shown in FIG. Therefore, when attaching the inner plug 20 to the container, as shown by the arrow in FIG. 5, while pushing and deforming the raised portion 21 from the left and right sides with fingers, the inner plug 20 is pushed into the container mouth portion and completely pushed. When the finger is released from the raised portion 21 after
Returns to the original state, and the inside of the container is also in a reduced pressure state.

[0013]

The inner plug of the present invention, when attached to a container, does not push up the inner plug due to an increase in internal pressure.
Rather, the inner pressure is reduced and the inner plug is pressed against the container mouth, so that high sealing performance can be secured.

[Brief description of drawings]

FIG. 1 is a sectional view of a container inner stopper 1.

FIG. 2 is a top view of the container inner stopper 1.

FIG. 3 is a cross-sectional view showing a state in which a raised portion 5 of the container inner stopper 1 is deformed.

FIG. 4 is an explanatory view showing a state where the container inner stopper 1 is mounted on the container 10.

FIG. 5 is a sectional view of the inner plug 20 of the container.

6 is a top view of the container inner stopper 20. FIG.

FIG. 7 is a sectional view of a conventional container inner stopper 30.

8 is a top view of the container inner stopper 30. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container inside plug 2 Flange part 3 Bottom part 4 Circumferential wall 5 Raised part 6 Folding part 7 Groove 8 Projecting piece 9 Annular convex part 10 Notch 11 Container 12 Outer lid 13 Mouth part 14 Annular recess 20 Container inside plug 21 Raised part 30 Container inside plug 31 bottom part 32 peripheral wall 33 flange part

Claims (3)

[Claims] 1. A container inner stopper having a dish shape and integrally formed with a flange portion on an outer periphery of an upper end, wherein an elastically deformable hollow raised portion is formed near a center of a bottom portion. 2. The container inner stopper according to claim 1, wherein the protruding portion is shaped so that it can be deformed by being pinched from the left and right sides with fingers. 3. The container inner stopper according to claim 1 or 2, wherein an annular folded portion is formed near the outer periphery of the bottom portion to facilitate elastic deformation of the raised portion.