JPH0231095Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a thermos flask that communicates the inside of the inner cylinder with the outside when the lid is pressed, and the liquid inside can be poured out without removing the stopper. .

[Conventional technology]

As conventional thermos flasks, the following thermos flasks are provided. To explain its structure, this thermos bottle has a bottle body consisting of an inner cylinder that can store liquid and an outer cylinder that covers this inner cylinder, and a stopper is attached to the opening at the top of the inner cylinder in a liquid-tight manner. has been done. A lid is attached to the top of the stopper that is fitted into the inner cylinder. The stopper is formed with a guide cylinder portion having a guide hole extending vertically therethrough, and a passage communicating the inside of the inner cylinder with the outside via a liquid injection port.

A valve rod is loosely inserted into a guide hole in a guide cylinder portion within the stopper so as to be movable in the vertical direction. A valve seat is formed in the lower part of the valve stem, and a biasing member stop is attached to the upper part. A biasing member is interposed between the biasing member stop and the groove on the outside of the guide tube, and this biasing member always biases the valve stem upward to guide the passage of the plug toward the valve seat. It is designed to be blocked by

Here, the operation of the thermos configured as described above will be explained. When the lid presses down the valve stem, the valve seat part separates from the passage of the stopper, and the passage communicates with the inside of the inner cylinder. After that, when the thermos bottle itself is tilted, the liquid inside the inner cylinder flows into the passage and is poured out through the liquid injection port.

However, in such a thermos flask, a portion of the liquid that has flowed into the passage may flow into the interior of the stopper through the gap formed between the guide hole and the valve stem. The inside of the stopper is closed by the outer wall of the stopper and the lid, and if the liquid that has flowed in is not drained out quickly, the liquid left in the closed space may rot or cause damage to the inner wall of the stopper and the inner wall of the lid. As a thermos flask for storing drinking liquid, there were hygienic problems such as mold growing on the thermos flask.

Conventionally, as a thermos flask that takes measures to solve such problems, a thermos flask is provided in which a gasket such as an O-ring is provided on the upper end surface of the guide cylinder of the stopper in a portion surrounding the valve stem. That is, this thermos flask is designed to liquid-tightly seal the gap formed between the guide hole and the valve stem by providing a packing such as an O-ring around the valve stem.

[Problem that the invention attempts to solve]

However, in the conventional example, a gasket such as an O-ring is provided around the valve stem, but if the gasket is used for a long time, the O-ring gasket deteriorates and its inner diameter expands, causing the risk of fluid leakage. There were some problems.

The present invention was devised in view of these circumstances, and its purpose is to provide a thermos flask that can sufficiently seal the gap between the guide hole and the valve stem.

[Means for solving problems]

In order to achieve the above object, this invention consists of a bottle body consisting of an inner cylinder that can store fluid and an outer cylinder that covers this inner cylinder, and a bottle body that is attached to the opening at the upper end of the inner cylinder and penetrates vertically. A stopper having a guide cylinder portion having a guide hole and a passage communicating with the outside, a lid body attached to the upper part of the stopper attached to the inner cylinder, and a lid body that can be moved from the outside to the bottom surface of the lid body. a slide cam that can be moved, a valve stem that is loosely inserted into a guide hole of a guide cylinder part so as to be movable in the vertical direction and has a valve seat part on the lower side, and a biasing member stop that is attached to the upper part of the valve stem. , a biasing member interposed between the biasing member stop and the stopper to bias the valve stem upward so that the passage of the stopper is closed by the valve seat;
In the thermos flask, the passage of the stopper is opened when the slide cam is pushing down the valve stem, and the lower surface of the biasing member stop and the upper end of the guide cylinder portion each surround the valve stem. A tapered part is provided on one of the outer surfaces of the part, and another tapered part into which the above-mentioned tapered part can fit is provided on the other inner surface of the part, and a ring-shaped packing is provided on one of the ends of these tapered parts. When the passage of the stopper is opened, the two tapered portions are fitted into each other, and the gasket is clamped between the tapered portions in a fluid-tight manner.

[Effect]

In the present invention, when the passageway of the stopper is opened, the two tapered portions are fitted into each other, and the gasket is clamped between the tapered portions in a fluid-tight manner.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

1 to 5 are diagrams showing embodiments of the present invention.

In FIG. 4, reference numeral 1 denotes an outer cylinder, and this outer cylinder 1 has a cylindrical shape with a bottom. An inner cylinder 2 capable of storing liquid is disposed within the outer cylinder 1. The inner cylinder 2 is provided with an inner wall and an outer wall, and a vacuum layer is formed between the inner wall and the outer wall. The outer cylinder 1 and the inner cylinder 2 are connected at their upper ends by a shoulder 3 to form a bottle body 4. A handle 5 is provided on the side of the bottle body 4.

A plug 7 is attached to the lower part of the shoulder 3 via a packing 6 so as to liquid-tightly seal the opening of the inner cylinder 2.

As shown in FIGS. 1 to 4, the stopper 7 has a funnel shape with an upper portion having a larger diameter than a lower portion. Inside the stopper 7, there is a guide hole 8 that passes through the top and bottom.
A guide cylinder portion 9 having a diameter and a passage 10 communicating with the outside are provided. The valve stem 1 is inserted into the guide hole 8.
1 is loosely inserted so that it can move freely in the vertical direction. Valve stem 1
A valve seat part 12 whose upper surface abuts against the gasket 6 is formed at the lower part of the valve 1, and a spring stop (biasing member stop) 13 is attached to the upper part. A core 14 is attached to the lower part of the valve seat portion 12 in a liquid-tight manner, and the core 14 is inserted into the inner cylinder 2. A heat insulating material 15 is housed within the core 14. A spring (biasing member) 17 is interposed between the spring stop 13 and the groove 16 on the outside of the guide cylinder portion 9. The spring 17 always urges the valve stem 11 upward to close the passage 10 of the stopper 7 with the valve seat 12.

As shown in FIGS. 2 and 3, the lower surface of the spring stopper 13 attached to the upper part of the valve stem 11 has a tapered portion 1 on the outer surface of the portion surrounding the valve stem 11.
8, and a ring-shaped packing 19 is provided at the end of the tapered portion 18. A tapered portion 20 into which the tapered portion 18 can be fitted is provided on the inner surface of the upper end surface of the guide cylinder portion 9 in a portion surrounding the valve stem 11 .

As shown in FIG. 1, a lid 21 is provided on the upper side of the bottle body 4 and the top of the stopper 7, and a liquid inlet 22 is formed between the end of the lid 21 and the shoulder 3. There is. As shown in FIGS. 1 and 5, the lid body 21 has an opening 23 formed therein, a semicircular spherical operating part 24 is placed on the upper side sandwiching the opening 23, and a valve stem 11 is placed on the lower side. A slide cam 25 that comes into contact with is arranged. The operating portion 24 and the slide cam 25 are fixed with screws 26.

The operating part 24 is formed to have a slightly larger diameter than the opening 23, and is designed to close the opening 23 when the thermos flask is not in use to prevent dust from entering the outside of the stopper 7.

The slide cam 25 has a horizontal surface 25a that is close to the lower surface of the lid body 21 at the front, a horizontal surface 25b that is located lower than the horizontal surface 25a, and these horizontal surfaces 2.
A slope 25c connecting 5a and 25b is provided, and a display surface 27 that "projects out" to the rear, a screw hole 28, and a flat surface 29 below the opening 23 are provided.

The operation of the thermos flask constructed as described above will now be explained with reference to FIGS. 1 to 5.
When the thermos flask is not in use, the operating section 24 extends forward and closes the opening 23, the valve stem 11 is urged upward by the spring 17, and the passage 10 is blocked by the valve seat 12. At the same time, the horizontal surface 25a of the slide cam 25 is in contact with the valve rod 11. Next, when using the thermos, please
If you move 4 backward, it will "exit" into the opening 23.
A display surface 27 appears. At this time, the upper end of the valve stem 11, which had been in contact with the horizontal surface 25a of the slide cam 25 inside the stopper 7, sequentially contacts the slope 25c and the horizontal surface 25b due to the backward movement of the slide cam 25, and is affected by the biasing force of the spring 17. I resist and get pushed down. When the valve stem 11 is pushed down in this way, the valve seat part 12 is separated from the passage 10 of the stopper 7,
The inside of the inner cylinder 2 is communicated with the outside via a liquid injection port 22. When the thermos flask is tilted by gripping the handle 5, the liquid inside the inner cylinder 2 is poured out through the passage 10 from the liquid injection port 22. A part of the content liquid that has flowed into the passage 10 enters the gap formed between the guide hole 8 and the valve stem 11, but the tapered part 18 is liquid-tightly connected to the tapered part 20 through the packing 19 in that gap. Since the stopper 7 is clamped to the stopper 7, the liquid content does not flow into the inside of the stopper 7.

After use, the operating section 24 is returned to the front so that the display surface 27 that appears in the opening 23 is no longer visible. At this time, the slide cam 25 also moves forward, and the upper end of the valve rod 11, which is urged upward by the spring 17, sequentially contacts the horizontal surface 25b, the slope 25c, and the horizontal surface 25a. The passage 10 is closed by the valve seat 12 when the upper end of the valve stem 11 is in contact with the horizontal surface 25a.

In the above embodiment, the tapered portion 1 is provided on the outer surface of the lower surface of the spring stop 13 at the portion surrounding the valve stem 11.
8 is provided, but it may be provided on the inner surface. Similarly, the tapered portion 20 is provided on the inner surface of the portion surrounding the valve stem 11 at the upper end of the guide cylinder portion 9, but it may be provided on the outer surface. Furthermore, the tapered portion 18
Although the gasket 19 is provided at the end of the tapered portion 20, it may also be provided at the end of the tapered portion 20.

[Effect of idea]

In the present invention, a tapered portion is provided on the outer surface of either one of the lower surface of the biasing member stop and the upper end of the guide tube portion surrounding the valve stem, and the tapered portion is fitted into the inner surface of the other one. Another tapered section is provided, and a ring-shaped packing is provided at one of the ends of these tapered sections, so that when the passage of the stopper is opened, the two tapered sections are fitted together, and the packing is attached to the tapered sections. Since they are held liquid-tight between them, the following excellent effects can be obtained.

That is, in the present invention, the gap formed between the guide hole and the valve stem can be liquid-tightly sealed by the pressing surface formed by the two mutually fitting taper parts pressing against the packing. . This allows the hygiene of the outside of the stopper and the bottle body to be maintained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of a thermos flask shown as an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken from FIG. 1, and FIG. 3 is an enlarged sectional view taken from FIG. 1. , FIG. 4 is a partially omitted partial sectional view of a thermos flask shown as an embodiment of the present invention, and FIG. 5 is an enlarged sectional view of the main part thereof. 1...Outer cylinder (bottle body), 2...Inner cylinder (bottle body),
4... Bottle body, 7... Stopper, 8... Guide hole (stopper),
9... Guide cylinder part (plug), 10... Passage (plug), 1
DESCRIPTION OF SYMBOLS 1... Valve stem, 12... Valve seat part, 13... Spring stop (biasing member stop), 17... Spring (biasing member), 18, 20... Taper part, 19... Packing, 21... ...Lid body.

Claims (1)

[Scope of utility model registration request] A bottle body consisting of an inner cylinder that can store fluid and an outer cylinder that covers the inner cylinder, and a guide cylinder part that is attached to an opening at the upper end of the inner cylinder and that has a guide hole that penetrates vertically and communicates with the outside. a stopper having a passageway, a lid attached to the upper part of the plug attached to the inner cylinder, a slide cam attached to the lid and configured to move a valve stem up and down by operation of an operating section; a valve rod that is loosely inserted into the guide hole of the guide cylinder so as to be vertically movable and has a valve seat portion on the lower side;
A biasing member stop attached to the upper part of the valve stem is interposed between the biasing member stop and the stopper, and the valve stem is urged upward to direct the passage of the stopper to the valve seat. a biasing member configured to close the valve by a lower surface of the biasing member stop and the guide, wherein the passage of the stopper is opened when the slide cam pushes down the valve stem; A tapered portion is provided on the outer surface of one of the upper ends of the cylindrical portion surrounding the valve stem, and another tapered portion into which the tapered portion can fit is provided on the inner surface of the other one, and the taper portion of these tapered portions is A ring-shaped gasket is provided on either end, and when the passage of the plug is opened, the two tapered portions are fitted together and the gasket is fluid-tightly clamped between the taper portions. A thermos flask that is characterized by