JPS5827729Y2 - Thermos using air pressure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a thermos flask that uses air pressure to take out the liquid in the inner bottle from the tip of the liquid guiding pipe protruding from the front of the outer case by the pressure of the bellows.

In conventional thermos flasks that use air pressure, the liquid in the inner bottle is poured by pressing the bellows, and even if the pressure on the bellows is released to stop pouring the liquid, droplets attached to the inner wall of the liquid guide pipe drip from the tip of the liquid guide pipe. A few drops fell.

For this reason, there was a drawback that the mounting place was always wet.

The present invention has been made in view of the above-mentioned drawbacks, and the object is to provide a thermos flask using air pressure that has a simple structure and that reliably prevents drops after pouring liquid due to the pressing and stopping operations of the bellows.

Embodiments of the present invention will be described below with reference to the drawings.

1 is a draining member 4 at the upper end of the outer case 3 surrounding the inner bottle 2.
A lid body 6 with a built-in bellows 5 is screwed to the upper surface of a draining member of the body so as to be openable and closable.

Reference numeral 7 denotes a liquid guiding pipe which penetrates through the exterior case 3 of the main body 1 and protrudes to the front of this exterior case, and whose rear end is in close contact with the hole 20 of the drainage member 4. A synthetic resin film 15 is stretched over the surface.

The material for the synthetic resin film 15 is preferably a synthetic resin to which droplets do not easily adhere, particularly a tetrafluoroethylene resin material.

- Processing of the synthetic resin film 15 on the inner wall surface of the tip 21 of the liquid guide pipe 7 may be carried out by immersing the tip 21 of the liquid guide pipe in a synthetic resin solution and molding it. It may be inserted through the opening.

Alternatively, the opening at the tip of the liquid guiding pipe 7 covered with a synthetic resin membrane may be curled inward as shown in FIG.

Reference numeral 10 denotes an inner stopper having a suction pipe 8 hanging down inside the inner bottle 2 and a discharge pipe 9 connected thereto, and is detachably fitted into the central opening of the draining member 4.

The discharge port 11 of the discharge pipe 9 is loosely fitted into the rear end of the liquid guide pipe 7 with a slight gap to prevent siphon action.

Reference numeral 12 designates an integral cover that covers the liquid guide pipe 7 passing through the outer case 3, and is attached to the front surface of the outer case with screws 13 and 13.

A bottom body 14 is attached to the lower end of the outer case 3 and supports the inner bottle 2.

16 is a bushing valve, 17 is a press plate, 18 is a lip device for the press plate, and 19 is a handle.

As described above, in the present invention, a synthetic resin film is stretched on the inner wall surface of the tip of the water guide pipe into which the tip of the discharge pipe loosely fits into the hole in the vacuum flask that uses air pressure, so that the drop after pouring when the bellows pressure is finished. It is possible to reliably prevent the objects from falling.

In other words, at the upper end of the rear end of the liquid guide pipe, extremely small droplets form and slightly adhere to the inner wall, and at the tip, droplets descend at the same time as the liquid is poured and almost become droplets and adhere to the inner wall of the synthetic resin membrane. There is no dripping after pouring the liquid.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view of an embodiment of the invention, Fig. 2 is a partially longitudinal side view showing the main parts of an embodiment of the invention, and Fig. 3 is a partially longitudinal side view of another embodiment of the invention. FIG. 1...Thermos bottle body, 2...Inner bottle, 3
...Exterior case, 4...Draining member, 5
...Bellows, 6...Lid body, 7...
... Liquid guide pipe, 8 ... Suction pipe, 9 ...
...Discharge vibrator, 10...Inner stopper, 11...
...Discharge port, 12...Cover integrated, 13...
... Screw, 14 ... Bottom body, 15 ...
・Synthetic resin membrane, 16... Bush valve, 17...
... Pressing plate, 18 ... Pressing plate locking device, 19 ... Handle, 20 ... Hole, 2
1... Tip of the liquid guide pipe.

Claims (1)

[Scope of utility model registration request] A draining member is attached to the upper end of the outer case that surrounds the inner bottle, and a lid with a built-in bellows is attached to the upper surface of this draining member so that it can be opened and closed. An inner plug having a pipe and a discharge pipe communicating with the suction pipe is removably fitted, and a liquid guide pipe is provided that is loosely fitted into the liquid discharge port of the discharge pipe so as to be freely inserted and removed in the vertical direction. The thermos flask uses air pressure and is configured such that the tip of the pipe protrudes to the front of the outer case, and the air pressure inside the inner bottle is increased by the pressure of the bellows to take out the liquid in the inner bottle to the outside, and the tip of the liquid guiding pipe is A thermos flask that uses air pressure and is characterized by having a synthetic resin membrane stretched over the inner wall.