JPH0314122Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a sealed air pot, and particularly to a reinforcing structure for a bellows lower plate of an air pump.

[Conventional technology]

Generally, in air pumps, the inside of the inner bottle communicates with the atmosphere through the air pump, so
Increase in internal pressure of the bottle during cooling with hot water can be avoided. However, since portable air pumps are sometimes carried horizontally, a sealed structure is required to prevent hot water from leaking. Therefore, there is a problem in that the internal pressure of the inner bottle increases and a force in the upward direction acts on the inner stopper.

In order to counter this pushing up force, in conventional air pots of this type, the bellows lower plate of the air pump, which is engaged with the outer lid of the pot, is pressed against the upper surface of the inner plug, and the above pushing up force is applied to the bellows lower plate. A structure was adopted in which the outer cover was used to support the structure.

[Problem that the invention attempts to solve]

However, the bellows lower plate of conventional air pumps was molded from synthetic resin materials such as polyethylene and polypropylene, and did not have sufficient strength. When this happens, the lower plate of the bellows deforms, and as a result, the inner stopper lifts up, resulting in an incomplete seal and the risk of hot water leaking.

Therefore, the purpose of this invention is to solve the above problem by reinforcing the bellows lower plate.

[Means for solving problems]

In order to solve the above problems, this idea
A metal reinforcing plate having a hole in the center is stacked on the lower surface of the bellows lower plate of the air pump, and its inner peripheral edge is pressed against the upper surface of the inner stopper, and its outer peripheral edge is engaged with the outer lid.

[Effect]

When the internal pressure of the inner bottle increases, the upward force acting on the inner stopper is supported by the outer lid via the metal reinforcing plate.

〔Example〕

Figure 1 shows an example of a sealed air pot, in which a shoulder body 2 is attached to the top of a stainless steel double-walled medium bottle 1 with screws 3, and the inner peripheral edge of the shoulder body 2 and the mouth part 4 of the medium bottle 1 are connected. With a packing 6' interposed in between,
Another gasket 6 is interposed between the inner peripheral edge of the shoulder body 2 and the inner plug 5.

A valve chamber 9 having a water passage 7 and an air passage 8 is provided inside the inner stopper 5, and a water supply pipe 10 is rotatably inserted into the valve chamber 9 from the side. A water passage hole 11 is formed at the rear end of the water supply pipe 10, and a packing 12 surrounding this water passage hole 11 is formed in the rear end of the water supply pipe 10.
A gasket 13 facing the air passage 8 is integrally formed on one side (see FIG. 2). The air passage 8 is connected to the bellows lower plate 1 of the air pump 14.
5 is butted against the connection port 16 provided in 5. Further, the valve chamber 9 is provided with an air hole 17 communicating with the inner bottle 1. The bellows lower plate 15 is sandwiched and engaged between a rib 31 formed on the inner surface of the pot outer lid 30 and a small protrusion 32 (FIG. 4) facing the rib 31.

A water pumping pipe 19 is connected to a safety valve device 18 to the water passageway 7 .

When the above-mentioned air pot is gripped by the knob 20 provided at the tip of the water supply pipe 10 and rotated 90 degrees around the axis, one of the gaskets 13 connects to the air passage 8.
At the same time, the water passage hole 11 faces the water passage 7 and is surrounded and sealed by the other gasket 12. Further, since the inside of the valve chamber 9 and the air passage 8 are continuous, the inside of the inner bottle 1 communicates with the air passage through the air hole 17 and the valve chamber 9.
Therefore, when the air pump 14 is operated, the internal pressure of the inner bottle 1 increases, and hot water is injected from the nozzle 21 at the tip of the bottle through the pumping pipe 19, the safety valve device 18, the water passage 7, and the water supply pipe 10.

Incidentally, a reinforcing plate 22 made of stainless steel is stacked on the lower surface of the bellows lower plate 15 of the air pump 14 described above. As shown in FIG. 3, this reinforcing plate 22 has a disk shape with a hole 23 in the center, and is formed so that the outer peripheral edge as a whole has a gently rising taper. The inner peripheral edge of the hole 23 has a rising portion 26 located between the annular rib 24 provided on the lower surface of the bellows lower plate 15 and the annular rib 25 provided on the upper surface of the inner plug 5.
is formed, and a flat portion 27 is formed around the rising portion 26. Further, a tapered surface 28 is formed around the flat portion 27, and an engaging portion 29 (see FIG. 4) is further formed on the outer peripheral edge.

The flat part 27 is brought into contact with the upper surface of the inner stopper 5,
The engaging portion 29 includes a rib 31 and a small protrusion 32 formed on the inner wall surface of the outer lid 30 together with the outer peripheral edge of the bellows lower plate 15.
It is clamped and engaged between the two.

The above-mentioned reinforcing plate 22 is attached to the inner bottle 1 when the bottle is sealed tightly.
When the internal pressure of the inner plug 5 increases and a pushing force is applied to the inner stopper 5, the inner stopper 5 receives the force without deforming and transmits the force to the outer cover 30 via the engaging portion 29.

〔effect〕

As described above, this invention has the inner circumferential edge of the metal reinforcing plate stacked on the lower surface of the bellows lower plate abutting the upper surface of the inner plug, and the outer circumferential edge engaging the outer lid.
The pushing up force acting on the inner stopper can be received by the metal reinforcing plate. The metal reinforcing plate can have sufficient strength by designing it to a required thickness, so there is no risk of deformation due to pushing up force, and therefore, it is possible to reliably prevent the inner stopper from lifting up.

Further, since it is only necessary to add one reinforcing plate in addition to the conventional structure, there is an advantage that there is no need to modify other structures.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted sectional view of the embodiment, Fig. 2 is a perspective view showing a part of the water supply pipe, Fig. 3 is a partially cutaway perspective view of the metal reinforcing plate, and Fig. 4 is the relationship with the outer cover. FIG. 3 is an enlarged cross-sectional view of the joint portion. 1...Middle bottle, 2...Shoulder body, 4...Mouth, 5...
... Inner stopper, 6 ... Packing, 14 ... Air pump, 15 ... Bellows lower plate, 22 ... Reinforcement plate, 2
3... Hole, 26... Rising portion, 27... Flat portion, 28... Tapered surface, 29... Engaging portion, 30...
...outer lid, 31...rib, 32...small protrusion.

Claims (1)

[Scope of utility model registration request] In a sealed air pot, an inner stopper is tightly fitted to the periphery of the shoulder body that is tightly fitted to the mouth of the inner bottle, and the bellows lower plate of the air pump is pressed against the top surface of the inner stopper. A sealed air pot characterized in that a metal reinforcing plate having a hole in the center is stacked on the lower surface of the plate, the inner peripheral edge of the metal reinforcing plate is pressed against the upper surface of the inner plug, and the outer peripheral edge is engaged with the outer lid.