JPS5937100B2 - air pot lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a lid for an air pot that pumps air into the pot by pressure from a hollow and pours out liquid in the pot.

Conventional configuration and its problems Conventionally, this type of air pot has a configuration in which a pushing body is provided in the upper center of the lid body, and by pressing this pushing body, the bellows are compressed and air is forced into the pot. However, the bellows is formed by thermally welding both or one of an upper plate part 8 having an expandable fold and an inlet port, and a lower plate part having an outlet port.

Therefore, stress concentrates on the heat welded part of the bellows that discharges compressed air, and depending on how often the air pot is used, the heat welded part /
Due to air leakage, the amount of liquid poured out of the pot decreased and even became impossible to pour out.Therefore, it was desired to develop a bellows with improved durability.

□ Purpose of the Invention In view of the above-mentioned conventional drawbacks, the present invention provides an air pot lid with improved bellows durability.

Structure of the Invention In order to achieve the above-mentioned object, the air pot lid of the present invention has an upper plate part having a telescoping pleat part and a boss forming an inlet, and a lower plate part having a boss forming an outlet. A bellows that is continuously integrally molded from synthetic resin, a return spring that is installed inside this bellows and suppresses and opens the check valve provided in the boss part of the upper plate part, and a lid that houses this bellows. It is composed of a main body, a pusher that is movable up and down in the cylindrical part of the upper opening of the lid main body, and a protective plate interposed between the cylindrical part of the lid main body and the upper plate part of the bellows.

With this configuration, the bellows, which is continuously and integrally formed of synthetic resin, is pressed by the pushing body through the check valve 8 and the protection plate, and the bellows, which is pressed on almost the entire surface of the upper plate, is made of synthetic resin as described above. Since the bellows is formed continuously and integrally with 3'L, the stress during compression of the bellows will not be concentrated, and the durability of this bellows will be extremely high.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 8 and 1 in FIG.

3 is a bellows housed in the lid main body 2, and a boss portion 3bk forming an inlet at the center is provided at the upper part of the pleat portion 3a.
An upper plate part 3c and a lower plate part 3e having a boss part 3d forming a discharge port in the center thereof are continuously formed integrally with synthetic resin.

The lid main body 2 has a cylindrical part 5 having an opening 4 at the center of its upper surface, and a flange part 7 having a plurality of notches 6 and extending toward the center at the lower end of the cylindrical part 5. It is integrally formed of synthetic resin or the like.

Reference numeral 8 denotes a pushing body that is provided in the cylindrical part 5 so as to be able to rise and fall freely, and includes a disc part 9 having a diameter slightly smaller than the inner diameter of the cylindrical part 5, and a circular disc part 9 below the disc part 9 having a diameter slightly smaller than the inner diameter of the flange part 7. Part 1
0, a plurality of guide portions 11 extending radially from the circumferential portion 10 and loosely fitting into the notch portion 6 of the flange portion 7, and a plurality of stoppers 12 protruding outward from the lower end of the circumferential portion 10.
A cross-shaped rib 13 erected at the center of the back surface of the disc portion 9 is integrally formed of synthetic resin or the like.

Reference numeral 14 designates a check valve that is loosely fitted into the boss portion 3b of the upper plate portion 3c of the bellows 3, and opens the suction port of the bellows 3 by a spiral return spring 15 incorporated in the bellows 3. It is secured by a plurality of protrusions 14a provided at its lower end.

16 is a seal ring provided on the check valve 14.

Reference numeral 17 denotes a protective plate interposed between the flange portion 7 of the lid body 2 and the upper plate portion 30 of the bellows 3, and a plurality of protective plates protrude radially from the center thereof and are inscribed in the circumferential portion 10 of the pusher body 8. A ring-shaped portion 20 includes a plurality of engagement pieces 21, and a plurality of guide pieces protrudes radially from the second ring-shaped portion 22 on its outer periphery and loosely fits into guide ribs 18 erected on the inner wall of the lid main body 2. 19, each ring-shaped part 20゜2
2 is made of synthetic resin or the like and is integrated with ribs 22a.

Reference numeral 23 designates a cover for the lid body 2, and the bellows 3 is retained in the center portion of the lid body 2 by a boss portion 3d of the lower plate portion 3e, and is housed in the lid body 2.

A backing 25 is provided at the lower end of the boss portion 3d of the bellows 3 that is engaged with the cover 23, and contacts the inner lid of the pot body 1 when the lid body 2 is closed, thereby communicating the bellows 3 and the inside of the pot.

26 is a lock lever for opening and closing the lid body 2.

The operation of the air pot lid constructed as described above will be described below.

First, when the pusher 8 that is biased against the upper part of the lid body 2 is pressed by the return spring 15 via the check valve 14, the pusher 8
The cross-shaped rib 13 presses the check valve 14, the seal ring 16 closes the inlet of the bellows 3, and the cross-shaped rib 13 presses the bellows 3 via the check valve 14, and the pushing body 80 yen The upper plate part 3cf of the bellows 3 is pressed and compressed at the lower end of the circumferential part 10 via the protective plate 17, and air is forced into the pot from inside the bellows 3.

Here, the pushing body 8 engages with the retaining piece 21 of the protection plate 17 that is engaged with the guide rib 18 of the lid body 2, and the lid body 2
0 The pusher body 8 moves up and down smoothly without being inclined much with respect to the cylindrical part 10.

As described above, according to this embodiment, the pleat portion 3a and the upper plate portion 3
c. The bellows 3 is formed continuously and integrally from the lower plate part 3e,
A protection plate 17 is interposed between the lower end of the cylindrical part 10 of the lid body 2 equipped with the pushing body 8 and the upper plate part 30 of the bellows 3. The stone 4 is pressed on almost the entire surface, and the pleats 3a are integrally formed with an approximately evenly thin wall, so that the stress acting on the bellows 3 is not concentrated locally, and as a result, the durability of the bellows 3 is high. It is.

Effects of the Invention As described above, the present invention has an elastic pleat part, an upper plate part with a boss part forming an inlet in the center part of the upper part, and a boss part forming an outlet part in the center part of the lower part. A bellows whose lower plate part is continuous and integrally molded from synthetic resin, a push body which is movable up and down on the cylindrical part of the upper part of the lid body that houses the bellows, and a space between the lower end of the cylinder and the upper plate part of the bellows. The durability of the bellows can be increased by the protective plate interposed between the bellows and the bellows, which has a significant practical effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the lid of an air pot showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the lid when opened. 2... Lid body, Total... Bellows, 3a.
...Fold part, 3c...Top plate part, 3e...
・・・Lower plate part, 4...Opening part, 5...
- Cylindrical portion, 8... Push body, 14... Check valve, 15... Return spring, 17... Protective plate.

Claims (1)

[Claims] 1. An upper plate part with elastic pleats, a boss part forming an inlet in the center, and a lower plate part having a boss part forming an outlet in the center are continuously molded from synthetic resin. a bellows; a return spring disposed inside the bellows to suppress and open a check valve provided in a boss portion of the upper plate portion; and a lid body for storing the bellows by engaging with the boss portion of the lower plate portion. ,
This air pot lid includes an f-pushing body which is provided in a cylindrical part of the upper opening of the lid main body so as to be movable up and down, and a protection plate interposed between the cylindrical part and the upper plate part of the bellows.