JPH0424870Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a lid for a container containing liquid cosmetics, etc., and particularly to a lid suitable for use in a positioning container.

"Problems with the Prior Art" Generally, in containers containing liquid cosmetics, etc., it is sometimes required to attach a gasket to the inner surface of the lid that is placed over the mouth in order to prevent liquid leakage.

Conventionally, lids for such containers have been equipped with, for example, a flat gasket made of an elastic material such as rubber, an O-ring, or the like on the inner surface.

By the way, for containers with Patsukin attached to the lid,
Whether the structure is a screw type, in which the lid is screwed on, or a fitting type, in which the lid is pushed in, the elastic force of the packing increases the engagement force of the screw or the fitting part, and prevents the lid from loosening. We are trying to prevent this and improve the airtightness.
In the case of conventional lids, in order to prevent the gasket from falling off, the back of the gasket is fixed to the inner surface of the lid, so when the lid is tightly tightened, the gasket is pressed against the opening. There is a problem that the lid becomes twisted due to the elastic deformation and recovery action of the gasket itself after the lid is closed, and the latter method is unsatisfactory in terms of cost, which is a problem that needs to be solved. The dot was hot.

In addition, with screw-type positioning containers, where the lid is stopped by engaging a locking protrusion while it is screwing, the lid cannot be tightened all the way, so the elastic force of the seal is reduced. However, with the conventional lid structure, it is difficult to achieve sufficient loosening prevention effect and sealing performance, which is a problem that needs to be solved.

The present invention was developed in view of these circumstances.The purpose of this invention is to improve the elasticity of the packing and thereby prevent it from loosening. An object of the present invention is to provide a lid for a container whose structure can reduce costs.

``Means for Solving the Problems'' The present invention provides a double-structured lid that integrates an inner lid and an outer lid, with a U-shaped cross section projecting downward on the top plate of the inner lid. A ring-shaped sealing part is provided,
forming a fitting hole inside surrounded by the sealing part;
A cylindrical gasket with a bottom that seals the opening is fitted into the fitting hole so as to be movable in the vertical and circumferential directions, and an outer periphery extending upwardly along the side wall of the inner lid is attached to the outer periphery of the bottom plate of the gasket. A wall is provided, and a curved surface is formed between the side wall portion of the inner lid and the top plate portion, which contacts the outer peripheral wall of the gasket and bends it inward when the inner lid is attached to the mouth. The seal is pressed upward by the axial load when the lid is installed, and its outer peripheral wall is elastically deformed by the curved surface of the inner lid, and at the same time, the sealing part is elastically deformed.
This reliably prevents the lid from loosening and improves the sealing performance of the container.

"Embodiment" An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a half-sectional view showing the lid of one embodiment, and FIG. 2 is a half-sectional view showing the lid screwed onto the container body. In these figures, reference numeral 1 is a container main body to which a lid of one embodiment is placed, and the other parts except for the mouth 2 are formed of synthetic resin or glass to have a desired cross-sectional shape. Mouth part 2
A pair of locking protrusions 3 are provided at the base end, and a thread 4 is formed on the outer periphery of the mouth 2, and an inner stopper 5 made of synthetic resin is fitted into the upper end of the mouth 2.

The lid 10, which is screwed onto the opening 2 of the container body 1, includes an outer lid 11 in the shape of a cylindrical head, which is shaped to match the shape of the container body 1 or for other purposes. It mainly consists of an inner lid 12 in the shape of a cylinder with a head fitted into the lid 11, and a packing 13 in the shape of a cylinder with a head attached to the inner lid 12, and the inner peripheral surface of the side wall of the inner lid 12 has an opening. Part 2 male thread 4
A female thread 14 is formed to be screwed into the. Further, on the top plate portion of the inner lid 12, there is an annular sealing portion 15 that protrudes downward (downward in FIG. 1) and has a U-shaped cross section.
At the same time, a fitting hole 16 is formed inside surrounded by the sealing part 15, communicating with the inside and outside of the inner lid 12 and into which the packing 13 is fitted.

The entire sealing portion 15 is formed thin and has appropriate elasticity, and this sealing portion 15
An annular locking rib 17 that prevents the gasket 13 from coming off is protrudingly provided at a position facing the fitting hole 16 . Note that the inner lid 12 having this sealing part 15 is
It is made of a synthetic resin such as polypropylene resin that has moderate hardness and exhibits a semi-permanent elastic effect, and when the lid 10 is screwed onto the opening 2 and closed as shown in FIG. The lower end of the sealing part 15 is pressed against the upper surface of the inner stopper 5 through the packing 13. Further, the tip (upper end) 15a of the annular sealing portion 15 forming the fitting hole 16 is a free end, and there is a gap between the tip 15a of the sealing portion 15 and the inner surface of the top plate portion of the outer lid 11. An appropriate interval C is formed, so that when the lower end of the sealing part 15 is elastically pressed against the upper surface of the inner stopper 5 via the packing 13, elastic strain occurs in the sealing part 15. , this elastic strain is absorbed and resolved in the interval C.

On the other hand, the packing 13 that is fitted into the fitting hole 16 is entirely made of soft synthetic resin, and a cylindrical portion 19 that is inserted into the fitting hole 16 projects from the center of the bottom plate portion 18. The outer peripheral surface of the cylindrical portion 19 is provided with a peripheral protrusion 2 that engages with the locking rib 17.
0 is set. Further, an outer circumferential wall 21 is provided on the outer periphery of the bottom plate portion 18 and extends upward along the side wall portion of the inner lid 12 over the entire circumference, and an outer circumferential surface 21a of the outer circumferential wall 21 is shown in FIG. like,
It forms a curved surface that gently curves inward.
It should be noted that an annular protrusion 22 is provided on the lower surface of the bottom plate portion of the packing 13 to press against the upper surface of the inner stopper 5.

Also, between the top plate part and the side wall part of the inner lid 12, when the inner lid 12 is screwed onto the mouth part 2, it comes into contact with the outer peripheral wall 21 of the packing 13 and bends it inward. A curved surface 23 is formed. on the other hand,
Locking protrusions 25 having stopper surfaces 24 that come into contact with the flat surfaces of the locking protrusions 3 of the container body 1 are formed protrudingly on the inner circumferential surface of the lower end of the inner lid 12, and the stoppers of these locking protrusions 25 are In front of the surface 24, the lid 1 is in elastic contact with the outer peripheral surface of the locking protrusion 3.
A cylindrical elastic protrusion 26 is provided to prevent the loose rotation.

Next, the operation of the lid according to the present invention constructed as described above will be explained.

When closing the lid 10, cover the opening 2 of the container body 1 with the lid 10 in the same way as a normal screw-on lid.
Just screw this in. Then, the gasket 13 comes into contact with the upper surface of the inner cap 5 during the spiral movement, forming an airtight state, and the sealing portion 15 and the outer circumferential wall 21 of the gasket 13 contact the gasket 13 and the inner lid 1, respectively.
By making elastic contact with the curved surface 23 of 2, the resistance force against the rotational movement begins to increase.

When the lid 10 is further rotated against this resistance force, at the final stage, the lower end of the sealing part 15 comes into pressure contact with the inner stopper 5 via the packing 13, as shown in FIG. The outer peripheral wall 21 of the curved surface 23
It is elastically deformed as shown by the two-dot chain line in FIG. At this time, since the sealing part 15 is made of a material having appropriate elasticity and is formed thin as described above, it is elastically deformed and comes into elastic pressure contact with the packing 13 as shown in the figure. Therefore, the elastic force of the sealing part 15 is added to the elastic force of the outer circumferential wall 21 of the packing 13, which strengthens the engagement between the male thread 4 and the female thread 14, and the lid 10
This prevents the container from loosening and rotating, improving the sealing performance of the container.

At the same time, the elastic protrusion 26 rides over the locking protrusion 3 and comes into pressure contact with the elastic protrusion 26, and is positioned with the locking protrusion 3 sandwiched between it and the locking protrusion 25. In addition, at this time, the other locking protrusion 3
is similarly positioned.

Also, during such an operation, the gasket 13
is fitted into the fitting cylinder 16 of the inner lid 12 so as to be movable in the vertical and circumferential directions, so that the packing 13
The cylindrical portion 19 is not twisted, and there is no fear that the lid 10 will loosen due to the elastic action of the cylindrical portion 19 after the lid is closed.

As shown in FIG. 2, when the lid 10 is in a closed state, the lid 10 will not return or loosen even if subjected to some vibration or shock.
It is reliably positioned with respect to the container body 1, and due to the synergistic action of the sealing part 15 and the packing 13, problems such as liquid leakage are reliably prevented. In particular, in the present invention, since sealing is achieved by both the sealing part 15 and the packing 13, the effect is extremely effective. Furthermore, in the present invention, the tip 15a of the sealing part 15 is a free end, and the tip 15a of the sealing part 15 and the outer lid 1
Since an appropriate distance C is formed between the inner surface of the top plate part 1 and the inner surface of the top plate part 1, a difference in surface pressure between the sealing part 15 and the packing 13 will occur due to variations in fitting of the inner cover 12, etc. When elastic strain occurs inside the sealing part 15, this elastic strain is canceled by moving the tip 15a of the sealing part 15 toward the gap C side. As a result, it is possible to prevent the elastic force of the sealing part 15 from weakening and the sealing effect from decreasing, and it is possible to make the surface pressure between the lower end of the sealing part 15 and the packing 13 equal and appropriate. , it is possible to further enhance the lid loosening prevention effect and the lid airtight effect, and to ensure the reliability of the effects.

Next time you want to remove the lid 10, just rotate the lid 10 in the loosening direction. Here, when the lid 10 is loosened or removed, the sealing part 15 and the outer circumferential wall 21 of the packing 13 return to the original state shown in FIG. 1 due to their own elasticity.

4 and 5 show another embodiment of the present invention, which shows the fitting hole 16 of the sealing part 15.
The inner wall portion 15a facing the lid 1 is extended upwardly, and the lid 1 is closed.
0 is in contact with the outer lid 11 even in the state where the sealing part 15 is removed, and in this embodiment, since the wall 15a of the sealing part 15 is in contact with the outer lid 11 from the beginning, the seal The elastic force of the portion 15 can be increased.

"Effects of the Invention" As explained above, the present invention provides the following excellent effects.

(a) The synergistic effect of both the packing and the sealing part, that is, the axial load when the lid is attached presses the packing upward, and its outer peripheral wall is pressed against the curved surface of the inner lid, causing it to elastically deform. By elastically deforming the sealing portion, the sealing performance of the container can be improved, and a reliable loosening prevention effect can be exhibited. In addition, since the packing is loosely fitted to the inner lid, the packing does not twist even if the lid is not tightened, especially in screw-type containers, and the packing is able to recover from its own elastic deformation. Therefore, there is no risk of the lid coming loose. Moreover, it is possible to eliminate the elastic strain that occurs inside the sealing part due to variations in fitting of the lid, etc., and it is possible to obtain an even and appropriate surface pressure effect between the packing and the sealing part. It is possible to further enhance the sealing effect and the lid loosening effect, and to ensure this.

(b) The above makes it possible to improve its applicability as a lid for a screw-type positioning container.

(c) Furthermore, since the above-mentioned sealed structure can be obtained with a simple structure, costs can be reduced.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a half-sectional view of the lid, and Figure 2 being a half-sectional view of the lid screwed onto the mouth of the container body. Figures 3 and 3 are enlarged sectional views of the circular portion shown in dashed lines in Figure 1, Figures 4 and 5 show other embodiments of the present invention, Figure 4 is a half sectional view of the lid, and Figure 5 is a half sectional view of the lid. is a half-sectional view showing the lid screwed onto the mouth of the container body. 1... Container body, 2... Mouth, 3... Locking protrusion, 4... Male thread, 5... Inner stopper, 10... Lid, 1
1...Outer lid, 12...Inner lid, 13...Putskin,
14... Female thread, 15... Sealing part, 16... Fitting hole, 17... Locking rib, 18... Bottom plate part, 19...
... Cylinder part, 20 ... Circumferential protrusion, 21 ... Outer peripheral wall, 23
...Curved surface.

Claims (1)

[Scope of utility model registration request] Headed cylindrical inner lid 1 attached to the mouth of the container body
2 and a headed cylindrical outer cover 11 stacked on the outside of the inner cover, the top plate of the inner cover 12 has a U-shaped cross section that protrudes downward, and has a U-shaped cross section as a whole. A thin annular sealing part 15 is provided, and a tip 1 of the sealing part 15 is bent upward.
5a is a free end, and an appropriate gap C is formed between the tip 15a of the sealing part and the inner surface of the top plate part of the outer lid 11, and the inside surrounded by this sealing part is A fitting hole 16 is formed in the fitting hole 16, and a bottomed cylindrical gasket 1 is provided in the fitting hole 16 to seal the opening.
3 is fitted so as to be movable in the vertical and circumferential directions, and on the outer periphery of the bottom plate portion 18 of the packing, there is an outer peripheral wall 2 extending upwardly along the side wall portion of the inner lid 12.
1 is provided between the side wall portion of the inner lid 12 and the top plate portion of the outer lid 11 so that when the inner lid is attached to the mouth, it contacts the outer peripheral wall 21 of the gasket 13 and pushes it inwardly. A lid for a container characterized in that a curved surface 23 that is pressed and bent is formed, and when the outer circumferential wall 21 of the gasket elastically presses against the curved surface 23, the sealing part 15 also comes into elastic pressure contact with the gasket 13. .