JPH0228831Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small-capacity thermos flask called a handy pot.

Conventionally, in this type of thermos flask, a cushioning body made of a foam material is interposed between the inner circumferential side of the outer case and the outer circumferential side of the liquid container fixed inside the outer case, to prevent damage to the liquid container or the product when dropped. We try to prevent the liquid container from shaking during assembly, but
There was a problem in that the work of wrapping and fixing the buffer body around the outer peripheral side of the liquid container with cellophane tape or the like was troublesome and caused productivity to be inhibited.

In view of the above-mentioned problems, the present invention includes a protrusion that acts in the same manner as the buffer body on the inner circumferential side of the exterior body, which is divided into two upper and lower cylindrical parts, and these two cylindrical parts are screwed together. The purpose is to prevent the liquid container from swinging and to prevent deformation of the threaded joint by integrally forming the pieces, and in order to achieve this purpose, both pieces are made of synthetic resin and are threadedly connected to each other. A liquid container is internally fixed in an exterior body constituted by a lower mouth side cylinder part and a bottom side cylinder part, and at least one of the lower mouth side cylinder part and the bottom side cylinder part has an internal thread. A plurality of protrusions to be in contact with the outer circumferential side of the liquid container are integrally formed on the circumferential side, and each of the protrusions has a male thread at the lower end of the lower mouth side cylinder part and the bottom side cylinder part. It is characterized by a structure in which notch recesses are respectively formed into which the opening edges of the device are fitted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A thermos flask according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

This thermos flask has a small capacity, and has a main body 1 and a synthetic resin exterior body 2 constituting the outer peripheral surface.
and a liquid container 3 made of a vacuum double bottle which is internally fixed within the exterior body 2 to form an inner peripheral surface.

The exterior body 2 is divided into an upper cylindrical portion 2a and a bottom cylindrical portion 2b. The two are screwed together by screwing together a female screw 5 formed on the lower opening edge of the lower opening side cylinder portion 2a.

In the bottom cylindrical portion 2b, the upper edge of the male thread 4 is an open edge 6 in which no thread is formed.

Further, on the inner circumferential side of the bottom cylinder portion 2b, there are a plurality of holes (8 in this embodiment) extending from the bottom to the back of the male screw 4.
) reinforcing ribs 7, 7... are integrally formed. This reinforcing rib 7 has the function of preventing the bottom side cylinder portion 2b and its male thread 4 from being deformed in the radial direction. Reference numeral 8 designates a receiving member that is screwed into the bottom opening 9 of the bottom cylinder portion 2b to support the bottom surface of the liquid container 3.

On the other hand, a lower mouth part 10 having both a liquid supply port 11 to the liquid container 3 and a gutter-like liquid injection passage 12 from the liquid container 3 is integrally formed in the upper part of the lower mouth side cylindrical part 2a.

The upper opening of the lower opening portion 10 is covered with a lower opening cover 13 having a plug insertion hole 14.

A plug 15 for opening and closing the liquid supply port 11 is screwed into the lower opening 10 through the plug insertion hole 14.

Furthermore, a handle 16 is integrally formed on the outer circumferential surface of the lower tube portion 2a on the opposite side of the liquid injection passage 12.

A female thread 5 is provided on the inner circumferential side of the lower cylindrical portion 2a.
A plurality of (eight pieces in this embodiment) protrusions 17, 17, .
are integrally protruded.

The projecting piece 17 is composed of a base 17a projecting toward the center from the inner circumferential surface of the lower cylindrical portion 2a, and receiving portions 17b extending circumferentially from both sides of the tip of the base 17a. , the receiving portion 17b is connected to the liquid container 3.
It is made to have elasticity so as to have a cushioning effect when it comes into contact with.

At the lower end of the base 17a of the projecting piece 17, the bottom side cylinder part 2 is attached when the lower mouth side cylinder part 2a and the bottom side cylinder part 2b are screwed together.
A notch recess 18 into which the opening edge 6 of b is fitted is formed.

By fitting the opening edge 6 into the notched recess 18, the male thread 4 is prevented from deforming inwardly when an impact is applied to the main body 1.

The projecting piece 17 has the function of maintaining an appropriate distance between the inner circumferential side of the exterior body 2 and the outer circumferential side of the liquid container 3 and preventing the liquid container 3 from swinging.

Note that the protruding piece 17 may extend integrally from the tip of the reinforcing rib 7 of the bottom side cylindrical portion 2b as shown in FIG. It may be formed integrally with both the inner circumferential side surface and the reinforcing rib 7 of the bottom cylinder portion 2b.

In the drawings, reference numeral 19 is a screw fixed to a threaded joint between the lower mouth side cylinder part 2a and the bottom side cylinder part 2b.

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

That is, according to the present invention, (1) Of the lower mouth side cylinder part 2a and the bottom side cylinder part 2b which constitute the exterior body 2 to which the liquid container 3 is to be fixed inside,
Since a plurality of protrusions 17, 17, .
The protrusions 17, 17... prevent the liquid container 3 from swinging, thereby preventing damage to the liquid container 3 when dropped and preventing the liquid container 3 from being damaged during assembly.
(2) The projecting pieces 17, 17... are integrally formed when the lower mouth side cylinder part 2a and/or the bottom side cylinder part 2b are molded, so that the positioning work can be simplified as in the conventional example. There is no need to attach a cushioning material during assembly, and productivity can be improved.
and a notch recess 18 into which the opening edge 6 of the bottom cylinder portion 2b having the male thread 4 is fitted, and the opening edge 6 to the notch recess 18 is formed.
By fitting, the male screw 4 is prevented from deforming inwardly when an impact is applied to the main body 1, so there are practical effects such as significantly improved durability.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a thermos flask according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Figs. It is a sectional view of the main part. 2...Exterior body, 2a...Lower mouth side cylinder part, 2b...
Bottom cylinder part, 3...Liquid container, 4...Male thread, 5...
Female thread, 6...Opening edge, 17...Protrusion piece, 18...
Notch recess.

Claims (1)

[Scope of utility model registration request] A liquid container 3 is internally fixed in an exterior body 2 constituted by a lower side cylinder part 2a and a bottom side cylinder part 2b, both of which are made of synthetic resin and are screwed together. A plurality of protrusions 17, 17, . At the lower end of the protruding piece 17, there is an opening edge 6 of the one having the male thread 4 among the lower mouth side cylinder part 2a and the bottom side cylinder part 2b.
1. A thermos flask characterized in that cutout recesses 18 into which are inserted are formed respectively.