JPS6344366Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for preventing the return of a lid in a lidded container for storing cosmetics, medicines, etc.

In general, for containers used to hold lotions, emulsions, creams, etc., with screw-type lids, the lid may return (loosen) due to various external, internal, and structural reasons. ) phenomenon occurs, which often causes the problem that the contents leak out. In particular, the lid return phenomenon occurs when adverse conditions are combined, such as when the lid is made of elastic polyolefin resin with a small coefficient of friction, the container body is made of glass, and the contents are oily substances such as emulsion or cream. It becomes easier.

Therefore, in order to solve this problem, various countermeasures have been tried in the past, such as changing the pitch of the threads, devising the shape of the threads themselves, or the structure of the gasket provided inside the lid. However, none of these methods were satisfactory.

This idea was made in consideration of the above points, and it is possible to prevent the lid from returning by a relatively simple method, thereby reliably eliminating the leakage of contents. This is what we are trying to provide.

An embodiment of this invention will be described below with reference to the attached FIGS. 1 and 2.

In the figure, 1 is a container body made of glass or synthetic resin, etc., and the upper part of the mouth part 2 of this container body 1 (a male thread 2a is formed on the outer peripheral surface of this mouth part 2) is the mouth part. 2, and a ring-shaped convex portion 3a is formed on the outer periphery of the lip 3 of the mouth portion 2. and the mouth rim 3
An inner stopper 5 made of synthetic resin or the like and having a circumferential groove 4 that closely fits into the opening rim 3 is fitted into the inner stopper 5 . Further, a cylindrical portion 6 having a spout a that enters into the mouth portion 2 of the container body 1 and serves as an outlet for the contents is integrally formed in the center of the inner stopper 5, and this cylindrical portion Ring-shaped protrusions 6a are formed on the inner circumferential surface of the cylindrical portion 6 to protrude at regular intervals in the axial direction of the cylindrical portion 6.

On the other hand, the reference numeral 7 is a cylindrical lid made of synthetic resin or the like having a head 7a, and the inner circumferential surface of the lid has a male thread 2a on the opening 2 of the container body 1.
A female thread 8 is formed to be screwed into the. Further, a hollow protruding rod 9 that enters into the cylindrical portion 6 of the inner stopper 5 is formed protruding from the center of the inner surface of the head 7a of the lid 7, and the outer circumferential surface of the protruding rod 9 is A ring-shaped projection 6a formed on the inner peripheral surface of the cylindrical portion 6
Similarly ring-shaped protrusions 9a that engage with the protrusions 9 are formed at regular intervals in the axial direction of the protruding rod 9 (in the illustrated example, at the same intervals as the respective protrusions 6a). Incidentally, reference numeral 10 is a ring-shaped packing made of an elastic material and set on the inner surface side of the head 7a of the lid 7.

Next, the operation of this invention will be explained.

First, when closing the lid 7 as shown in FIG. Enter 6. At this time, that is, when the protruding rod 9 enters, each protruding ridge 9a of the protruding rod 9 engages with each protrusion 6a of the cylindrical portion 6, and mutual friction occurs between them, thereby causing the lid 7 Although some resistance acts on the rotation operation of the lid 7, this resistance force is relatively small compared to the normal rotation operation force of the lid 7 due to its structure.
As the lid 7 is screwed in, the protruding rod 9 gradually enters into the cylindrical portion 6. When the lid 7 is completely screwed in, the gasket 10 comes into close contact with the upper surface of the inner plug 5, and at this time, each protrusion 9a of the protruding rod 9 is positioned between each protrusion 6a of the cylindrical portion 6 (fitting). ) will be done. Therefore, in this state, the contents inside the container body 1 will not leak out. Here, when various factors such as external factors such as vibration and internal factors such as oily contents act, the lid 7 is likely to return. However, in this invention, each protrusion 9a of the protrusion rod 9
and each protrusion 6a of the cylindrical portion 6 are engaged with each other, so the frictional force caused by this engagement causes the lid 7 to
The return phenomenon is reliably prevented. In this way, even if various factors act, the phenomenon of the lid 7 returning does not occur,
Therefore, leakage of the contents within the container body 1 is prevented.

Note that even if the lid 7 returns to some extent, each protrusion 9a of the protruding rod 9 will come into close contact with each protrusion 6a of the cylindrical portion 6, and each protrusion 9a and each protrusion 6a will be formed in a ring shape. Since the contact portion functions as a so-called seal plug, leakage of the contents is thereby prevented. In addition, the protruding rod 9
Each of the protrusions 9a also functions as a stopper for the gasket 10 to come off. In addition, since the inner stopper 5 is used,
As shown in the figure, the inner circumferential surface of the opening 2 of the container body 1 can be made to have a surface free from irregularities that would hinder product molding. It is also possible to make it a manufactured product.

Furthermore, since a plurality of protrusions 6a on the inner circumferential surface of the cylindrical portion 6 and a plurality of protrusions 9a that engage with the protrusions 6a are provided and are equally spaced from each other, even if the lid 7 is loosened to return to a certain extent, Also, each protrusion 6a
The engaged state of each protrusion 9a is maintained as it is, and the return prevention effect still works. That is, since a plurality of protrusions 6a and protrusions 9a are both formed at equal intervals, even if their respective engagement positions shift in the axial direction of the lid, they will engage with each other at that position, so that the return prevention effect is achieved. The effect is that the working range is wide in the axial direction of the lid.

Furthermore, when the lid 7 is screwed into the so-called closed lid state, the gasket 10 seals the spout of the inner stopper, and at the same time, the protrusion 6a and the protrusion 9a are completely engaged to exert the action of preventing the lid from returning. However, since a plurality of protrusions 6a and ridges 9a are formed at equal intervals, and the range in which the lid prevents the lid from returning is widened, the closed position of the lid can be adjusted accordingly. In this case, it is relatively easy to set the correlation between the position where the gasket 10 seals the spout and the position where the protrusion 6a and the protrusion 9a engage. In other words, even if the axial position of the lid 7 where the gasket 10 seals the spout changes somewhat, this can be adequately accommodated. Moreover, the accuracy of setting the above-mentioned correlation can be improved by simply reducing the intervals between the protrusions and between the protrusions.

FIGS. 3 and 4 show another embodiment of this invention, and in this embodiment, the spout of the inner stopper, which serves as an outlet for the contents, is made smaller. That is, a cylindrical part 21 having a small-diameter spout b is formed in the center of the inner stopper 20, and an annular protrusion 22 is formed in close contact with the inner peripheral surface of the mouth rim 3 of the container body 1. A small-diameter columnar protruding rod 23 that enters into the cylindrical portion 21 is formed on the 7 side, and a ring-shaped rod is formed on the outer circumferential surface of the columnar protruding rod 23 and the inner circumferential surface of the cylindrical portion 21 as in the previous embodiment. protrusion 23a
and a protrusion 21a, respectively. Here, 24 indicates a reinforcing rib.

It should be noted that the functions and effects of this embodiment are almost the same as those of the previous embodiments, so a description of the functions and effects will be omitted.

In addition, in each of the above embodiments, if slits are formed in the protruding rod 9 and the columnar protruding rod 23 to give them elasticity, wear due to friction between the protruding ridges 9a, 23a and the protrusions 6a, 21a can be greatly reduced. be able to.

As described above, according to this invention, it is possible to prevent the lid from returning by a relatively simple method, thereby reliably eliminating leakage of contents, and the structure is simple. It has excellent practical effects. In addition, especially according to the present invention, since the inner stopper with the cylindrical part is used and the protrusion is formed on the inner peripheral surface of the cylindrical part, the container main body can be made of glass. Therefore, there is an excellent effect that the lid return prevention structure can be easily applied to glass containers, which are the most widely used containers of this type. Furthermore, since the range in which the return prevention action works is wide in the axial direction of the lid, even if it loosens a little, it is unlikely to loosen any more. In this case, it is relatively easy to set the correlation between the position where the gasket seals the spout and the position where the protrusion and the protrusion engage. In other words, even if the axial position of the lid where the gasket seals the spout changes somewhat, this can be adequately accommodated. Furthermore, there is an effect that the setting accuracy of the above-mentioned correlation can be improved simply by reducing the intervals between the protrusions and the protrusions.

[Brief explanation of drawings]

Fig. 1 is a central vertical sectional view showing one embodiment of this invention, Fig. 2 is a front view of the protruding rod in Fig. 1, and Fig. 3 is a central longitudinal sectional view showing another embodiment of this invention. FIG. 4 is a cross-sectional view of the inner stopper in FIG. 3. 1... Container body, 2... Mouth, 2a... Male thread, 3... Mouth rim, 3a... Convex portion, 4... Peripheral groove, 5
...Inner plug, 6...Cylindrical part, 6a...Protrusion, 7...
Lid, 7a...Head, 8...Female thread, 9...Protruding rod, 9a...Protrusion, 10...Putskin, a, b...
... Outlet, 20 ... Inner stopper, 21 ... Cylindrical part, 21
a...Protrusion, 22...Annular protrusion, 23...Columnar protruding rod, 23a...Protrusion.

Claims (1)

[Scope of utility model registration request] In a container comprising a glass container body 1 and a capped cylindrical lid 7 screwed over the mouth 2 of the container body, an inner stopper 5 is fitted into the rim 3 of the mouth of the container body, This inner stopper is formed with a cylindrical part 6 that enters into the mouth of the container body and serves as an outlet for the contents, and the inner peripheral surface of this cylindrical part has a ring shape that goes around the inner peripheral surface. A plurality of protrusions 6a are formed at intervals in the axial direction of the cylindrical portion, while a protruding rod 9 that enters into the cylindrical portion of the inner stopper is formed on the inner surface of the head 7a of the lid. A plurality of ring-shaped protrusions 9a that engage with the protrusions 6a on the inner circumferential surface of the cylindrical portion are formed on the outer peripheral surface of the protruding rod at intervals in the axial direction of the protruding rod and equal to the spacing between the protrusions 6a. A structure that prevents the lid from returning.