JPH0228836Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a tabletop thermos flask for general household use.

(Prior Art) As shown in FIGS. 2 and 3, a conventional thermos flask of this type has a holder 19 having an internal thread attached to the lower part of the outer frame 18, and is screwed onto the internal thread of the holder 19. In addition, a bottom frame 20 having an internal thread is attached to an inner cylindrical portion formed inside the outer frame 18 via a holder 19 to constitute the bottom part of the outer frame 18. Inside the outer frame 18 is a vacuum double bottle, with a tip tube 22 in the center of the bottom.
The container fixture 21 is screwed onto the inner thread of the bottom frame 20, surrounds the tip tube 22, and extends the upper end downwardly to the bottom of the glass container 15. The glass container 15 is fixed by pressing the outer frame 18 into contact with the outer frame 18 and locking the upper end with a shoulder (not shown) of the outer frame 18. (For example, Japanese Utility Model Publication No. 56-32168) (Problems to be solved by the invention) According to the above structure, since the tip tube 22 is formed at or near the center of the bottom of the glass container 15, the container fixing tool 21 If it is a fixing means that does not come into contact with this tip tube 22, then this tip tube 22
Even if the vicinity was pushed up, the glass container 15 did not easily deform, so no stress was generated in the chip tube 22. However, the glass container 15 has the disadvantage of being weak against impact forces, and as a solution to this problem, it has been devised to make the container from metal such as stainless steel. In a metal container, the tip tube is made of a copper pipe or the like, and the seal portion thereof is only pressure-welded, and an impact to this seal portion or stress to the vicinity thereof will destroy the seal. Metal containers use thin-walled materials to reduce weight and reduce heat conduction losses. Therefore, when fixing a metal container, like a glass container, if you push up the center of the metal container near the tip tube, the impact and concentrated stress on the tip tube and its vicinity will cause deformation, break the seal, and damage the pressure welding part. , there were problems such as causing a decrease in the degree of vacuum.

(Means for Solving the Problems) The present invention has been made to eliminate the above-mentioned drawbacks, and includes providing a downward annular groove near the outer periphery of the bottom of the metal container, and attaching the other side of the container fixture to this annular groove. The shape corresponds to

(Function) With the above structure, the bottom strength of the metal container is increased by the annular groove, and the metal container will not be deformed even if it is pushed up forcefully with a container fixing tool when the metal container is fixed. The distance between the contact part and the container fixing tool that comes into contact near the outer periphery of the bottom of the metal container is far apart, so that it does not affect the tip tube.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the structure of the embodiment is a metal container 1 consisting of an inner container 2 and an outer container 3. 4 is a vacuum insulation layer formed between the inner container 2 and the outer container 3. Reference numeral 14 designates a chip tube for exhausting air and gas within the vacuum layer 4, and a pressure contact portion A is formed at the tip of this chip tube 14. Reference numeral 5 denotes an annular groove formed in the vicinity of the outer periphery of the bottom of the metal container 1 in a downwardly concave shape.
Reference numeral 6 denotes an outer frame that covers the outer periphery of the metal container 1, and has a half-curled portion 16 formed at the upper end and a fully curled portion 17 formed at the lower end. At the upper part of the outer frame 6, a shoulder part 8 of a thermos flask having a spout 7 is fixed to a semi-curled part 16. Reference numeral 9 denotes a holder fixed above the entire curled portion 17 at the lower part of the outer frame 6, and has several internal threads formed inside. Reference numeral 10 denotes a container fixing device which is screwed onto the holder 9 on one side of its cylindrical outer periphery with a male thread formed corresponding to the female thread of the holder 9, and on the other side, the cylindrical upper end is attached to the container 1. It has a corresponding shape so as to fit into the annular groove 5 of. 11 is a bottom frame, and 12 is a screw for fixing the bottom frame 11 and the container fixture 10. 1
3 is a stopper of a thermos flask provided at the upper part of the shoulder part 8.

The operation of this embodiment having the above configuration will be explained.

The annular groove 5 is located near the bottom outer periphery of the metal container 1,
This is the part that the container fixture 10 comes into contact with, and the contact area is wider than in the past, and there is less concentrated load on the bottom of the metal container 1.
Since the distance 4 is large, stress and strain have less influence on the pressure contact part A of the chip tube 14, and the pressure contact part A will not be damaged and the degree of vacuum will not be lowered. Furthermore, by forming the annular groove 5 in the metal container 1, the bottom strength of the metal container 1 is increased, and even if the container fixing tool 10 screwed into the annular groove 5 through the holder 9 of the outer frame 6 is pressed against the metal container 1, The container 1 does not undergo deformation or the like.

(Effects of the invention) As described above, according to the invention, an annular groove is provided on the outer periphery of the bottom of a metal container, and a container fixing tool that comes into contact with this annular groove via a holder provided at the bottom of the outer frame presses the metal container to release it. By being able to fix it within the frame, the strength of the metal container can be improved, the tip tube can be prevented from breaking, and the installation position of the tip tube is not limited to the center of the bottom of the metal container, allowing for greater manufacturing tolerance. There are effects such as being able to.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of the main part of a thermos flask showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the main part of a conventional thermos flask, and Fig. 3 is a downward perspective view of the container fixing device of the same thermos flask. be. 1... Metal container, 5... Annular groove, 10... Container fixing tool.

Claims (1)

[Scope of utility model registration request] A metal container made of a vacuum double bottle housed in an outer frame,
In a thermos flask equipped with a holder fixed to the lower part of the outer frame, and a container fixing device screwed onto the holder on one side and facing the bottom of the metal container on the other side, there is a downward-facing wall near the outer periphery of the bottom of the metal container 1. A thermos flask characterized in that an annular groove 5 is provided and the other side of the container fixture 10 is shaped to correspond to the annular groove 5.