JPS6126207Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pressure reducing valve structure for a sealed container, and is capable of automatically eliminating a negative pressure state within the sealed container.

A sealed container such as a lunch box that includes a container body and a lid that freely opens and seals the opening of the main body is provided with an air hole in the lid and a valve body that can open and close the air hole to reduce the temperature. When the inside of the main body becomes negative pressure, the negative pressure state inside the main body is eliminated by opening the valve body, thereby making it possible to easily remove the lid from the container main body. However, in the past, for example, the valve body was configured to be screwed into the air hole, and opening the valve body required a troublesome operation such as loosening the screw engagement of the valve body.

The present invention solves the above-mentioned problems, and its features include a container body 1 and a lid 3 that seals the opening of the container body 1 so that it can be opened and closed, and the lid 3 has an air hole 9. In a sealed container provided with a valve body 14 for freely opening and closing the air hole 9, the air hole 9 connects an outer large-diameter hole 10 and an inner small-diameter hole 11 via a stepped portion 12. The stepped portion 12 has a circular recess 1 at its inner edge.
3 is recessed, and the valve body 14 has a large diameter hole 10.
The large diameter portion 15 is fitted into the small diameter hole 11, and the small diameter portion 16 is fitted into the small diameter hole 11. An air passage 17 comprising a passage 19 recessed in the small diameter hole 12 and a passage 20 recessed in the hole wall of the small diameter hole 11 radially outward from the passage 19 to the inner end of the small diameter hole 11.
is provided between the hole wall of the air hole 9 and the valve body 14, and the flange portion 2 is closely attached to the inner opening edge of the air hole 9 so as to close the air passage 17 on the valve body 14.
1 is provided, and the valve body 14 is connected to the container body 1.
The flange portion 21 is configured to be elastically deformable so as to open the air passage 17 due to the negative pressure inside.

Hereinafter, the present invention will be explained according to the illustrated embodiments. In FIGS. 1 to 5, 1 is a container body of a sealed container such as a bento box, which is a rectangular parallelepiped-shaped box made of synthetic resin or the like with an open top end. A pair of locking receiving portions 2 are provided on the long side of the opening edge to project outward. Reference numeral 3 denotes a lid body that opens and closes the upper end opening of the container body 1, and a pair of support portions 4 are provided on the lid body 3 to protrude outward in the width direction in correspondence with the locking receiving portions 2. Reference numeral 5 denotes a locking member, both ends of which are rotatably supported on the support portion 4 about a horizontal axis 6. When the locking member 5 is rotated so as to project downward from the support portion 4, The locking member 5 detachably engages with the lower surface of the locking receiver 2, and this engagement allows the lid 3 to be attached to and detached from the container body 1 via the sealing member 7 so as to seal the upper end opening thereof. It can be fixed freely.

Reference numeral 9 denotes an air hole provided in one corner of the lid body 3, and this air hole 9 has a large diameter hole 10 on the upper side and a small diameter hole 1 on the lower side.
1 with a stepped portion 12 interposed therebetween, and a ring-shaped recess 13 is sunk in the upper inner edge of the stepped portion 12. 14 is a valve body that closes the air hole 9;
The valve body 14 is made of an elastic material such as silicone rubber so as to be elastically deformable by the negative pressure inside the main body 1, and the valve body 14 is fitted into the large diameter part 15 which is fitted into the large diameter hole 10 and into the small diameter hole 11. A small diameter portion 16 is provided. 1
Reference numeral 7 denotes an air passage provided between the hole wall of the air hole 9 and the valve body 14, and a gap 18 between the hole wall of the large diameter hole section 10 and the large diameter section 15, and an air passage provided in the step section 12 in the radial direction. A pair of upper passages 19 correspondingly sunk downward and a small diameter hole 11
A lower passage 20 is formed by recessing the hole wall outward in the radial direction from the upper passage 19 to the lower end of the small diameter hole portion 11. Reference numeral 21 denotes a flange portion provided at the lower end of the valve body 14, which is in close contact with the inner (lower) opening edge of the air hole 9 so as to be able to freely approach and separate from it so as to close the air passage 17.

According to the configuration of the above embodiment, when the inside of the main body 1 becomes negative pressure, as shown by the chain lines in FIGS. 4 and 5,
Due to the pressure difference between the inside and outside of the main body 1, the large diameter portion 15 is elastically deformed into an arcuate shape so that the central portion descends and protrudes into the annular recess 13, and the small diameter portion 16 moves downward within the small diameter hole 11, and the flange The portion 21 moves downward so as to be separated from the lower opening edge of the air hole 9. As a result, the air passage 17 is automatically opened, and the negative pressure inside the main body 1 is eliminated. And after that, valve body 1
4 returns to its original state due to its elastic force, and the air passage 17 is closed by the flange portion 21. It is also possible to move the flange portion 21 downward and open the air passage 17 by pressing the upper surface of the large diameter portion 15 of the valve body 14 downward with a finger.

According to the present invention, since the annular recess 13 is sunk in the inner edge of the step 12 of the air hole 9, the main body 1
When the inside becomes negative pressure, the large diameter portion 15 easily elastically deforms so that its central portion protrudes into the annular recess 13 due to the pressure difference between the inside and outside of the main body 1, and the small diameter portion 16 smoothly moves inside the small diameter hole 11. , and the flange portion 21 is separated from the lower opening edge of the air hole 9 .
As a result, the air passage 17 automatically opens and the main body 1
The negative pressure inside can be reliably eliminated. After that, the valve body 14 returns to its original state due to its elastic force.
The air passage 17 can be automatically closed by the flange portion 21. It is also possible to move the flange portion 21 and open the air passage 17 by pressing the large diameter portion 15 of the valve body 14 with a finger. Moreover, the air passage 17 is connected to the annular gap 18 between the hole wall of the large diameter hole 10 and the large diameter part 15, the upper passage 19 sunk in the step 12, and the small diameter hole 11.
The hole wall is radially outward from the passage 19 to the small diameter hole portion 11.
The valve body 4 is provided with a passage 20 that is recessed across the inner end, and there is no need to form a ventilation groove for forming the air passage 17 in the valve body 4, and the valve body 4 can be formed in a simple shape. Even if the valve body is made of an elastic material such as rubber, there is no fear that it will be easily damaged, and it can withstand long-term use, and its practical effects are significant.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
3 is an enlarged plan view of the same essential parts, FIG. 4 is a cross-sectional view taken along the line A--A in FIG. 1, and FIG. 5 is a cross-sectional view taken along the line B--B in FIG. 1. 1... Container body, 3... Lid, 9... Air hole,
14... Valve body, 21... Flange portion.

Claims (1)

[Scope of utility model registration request] It comprises a container body 1 and a lid 3 that seals the opening of the container body 1 in an openable and closable manner, and the lid 3 is provided with an air hole 9 and a valve body 14 that freely opens and closes the air hole 9. In the sealed container, the air hole 9 has an outer large diameter hole 10 and an inner small diameter hole 11.
formed into a stepped shape with a stepped portion 12 interposed therebetween;
A circular recess 13 is formed in the inner edge of the stepped portion 12, and the valve body 14 includes a large diameter portion 15 fitted in the large diameter hole 10 and a small diameter portion 16 fitted in the small diameter hole 11. , a ring-shaped gap between the hole wall of the large-diameter hole 10 and the large-diameter portion 15, and a passage 19 sunk in the stepped portion 12;
A passage 20 is formed by recessing the hole wall of the small diameter hole 11 radially outward from the passage 19 to the inner end of the small diameter hole 11.
An air passage 17 is provided between the hole wall of the air hole 9 and the valve body 14, and is in close contact with the inner opening edge of the air hole 9 so as to close the air passage 17 to the valve body 14. Depressurization of a sealed container characterized in that a flange portion 21 is provided and the valve body 14 is configured to be elastically deformable so that the flange portion 21 opens an air passage 17 due to negative pressure within the container body 1. structure.