JPS5931156Y2 - thermos - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a thermos flask, and more particularly to the structure of a screw-fitting portion of a stopper in a thermos flask.

Hereinafter, a thermos flask according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, numeral 1 is an exterior case, 2 is a lower opening member,
3 indicates a medium bottle, 4 indicates a draining ring, and 5 indicates a stopper.

The lower mouth member 2 is formed into a funnel shape from a metal material such as stainless steel, and a part of the mouth edge thereof is used as a spout.

An opening 6 communicating with the mouth of the medium bottle 3 is formed in the center of the lower mouth member 2, and an outward folding piece 7 is integrally formed at the mouth edge of the opening 6. There is.

On the other hand, at the upper end of the exterior case 1 and the upper end of the drain ring 4,
Inward facing flanges 8 and 9 are integrally formed.

Thus, the outer case 1 and the drain ring 4 are connected to the lower mouth member 2 by sandwiching their flanges 8 and 9 to the folded pieces 7 of the lower mouth member 2.

As shown in FIG. 3, the side circumferential portion of the drain ring 4 has an engagement groove 10 slightly inclined with respect to the horizontal direction, and a notch 11 that opens downward from the downwardly sloped end of the engagement groove 10. is formed.

A threaded ring body 12 made of synthetic resin and having an internal thread 13 into which the plug body 5 is screwed is fitted into the central opening 6 of the lower mouth member 2 .

An external thread 16 is formed on the outer periphery of the plug body 5.

As shown in FIG. 3, a flange portion 14 is integrally provided at the lower end of the outer periphery of the threaded ring body 12, and the 7 run portions 14
Protrusions 15 that engage with the engagement grooves 10 of the draining ring 4 are formed at appropriate locations on the outer periphery.

The width of the protrusion 15 is slightly smaller than the width of the notch 11 of the drain ring 4.

The flange portion 14 has the function of pressing against a gasket 17 disposed at the upper end portion of the medium bottle 3.

Thus, the threaded ring body 12 is fitted into the central opening 6 of the lower mouth member 2 from below.

At this time, after the protrusion 15 of the threaded ring body 12 is engaged with the engagement groove 10 through the notch 11 of the draining ring body 4, the threaded ring body 12 is rotated in the direction of arrow A to engage the protrusion 15. Tightly engage the groove 10.

In this way, the threaded ring body 12 can be attached to the lower mouth member center opening 6.
It can be tightly and firmly fitted and fixed.

Next, the effects of the thermos of the present invention are listed below.

That is, according to the present invention, (1) the central opening 6 of the lower opening member 2;
A threaded ring body 12 having an internal thread 13 into which the plug body 5 is to be screwed.
Since it is fitted and fixed, a threaded stopper can be used as the stopper 5, and the stopper 5 will not accidentally fall off when the thermos flask falls over. (2) The screw ring 12 is By tightly engaging the protrusion 15 formed on the outer periphery with the retaining groove 10 formed on the side periphery of the draining ring 4 which is clamped and fixed to the folded piece 7 of the lower opening member 2, the lower opening Since it is fitted and fixed in the member center opening 6, the threaded ring body 12 is tightly and firmly fixed, and water can be prevented from getting wet from the joint surface between the lower mouth member 2 and the threaded ring body 12. (3) Since the threaded ring body 12 is engaged and fixed to the draining ring body 4, the twisting force when screwing the stopper 5 onto the threaded ring body 12 is applied to the mouth of the medium bottle. There are practical effects such as the ability to improve the durability of the medium bottle 3.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the upper part of a thermos according to an embodiment of the present invention, Fig. 2 is an enlarged view of the Y section in Fig. 1, and Fig. 3 shows the draining ring and screw ring of the thermos shown in Fig. 1. FIG. 1...Exterior case, 2...Lower opening member,
4...Draining ring body, 5...Bung body, 6...
...Central opening, 7...Folding piece, 8゜9.
...Flame, 10...Engagement groove, 12...
...Screw ring body, 13...Inner thread, 15...
···protrusion.

Claims (1)

[Scope of utility model registration request] The inward facing flange 8 at the upper end of the exterior case 1 and the inward facing flange 9 at the upper end of the draining ring 4 are sandwiched between the outward folding piece 7 formed at the center opening edge of the lower mouth member 2. , the lower opening member 2
A threaded ring body 12 having an internal thread 13 into which the plug body 5 is to be screwed is fitted into the central opening 6 of the screw ring body 12.
A thermos bottle characterized in that a protrusion 15 integrally formed on the outer periphery is tightly engaged with an engagement groove 10 formed on the side periphery of the ring body 4.