JPH0433098Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of the invention This invention relates to a stopper for a thermos flask that is screwed onto the cap of the flask to close the opening at the top of the inner container.

(b) Background of the invention Conventionally, the stopper of the above-mentioned thermos flask has a structure as shown in FIG. 4, for example.

That is, a metal cylindrical outer container 41, an inner container 42 as a heat-insulating bottle, a spout 43, and a handle 4.
4 is integrally formed with heat-resistant synthetic resin.
In the thermos 46 equipped with the above-mentioned cap part 4
A plug body 47 is provided which is screwed onto the inner container 5 to close the upper end opening 42a of the inner container 42.

This plug body 47 includes a cap-shaped upper lid 48 and a lower lid 51 that fits on the inner peripheral surface of the upper lid 48 and has a spiral strip 49 on the lower outer periphery and a fluid passage 50 inside. An on-off valve 52 is provided at the bottom of the fluid passage 50.

The above-mentioned on-off valve 52 has a valve operating rod 53 integrally projecting upward from the center of its upper surface, and this valve operating rod 53 is connected to the opening 55 of the stepped portion 54 forming the fluid passage 50 of the lower lid 51. The on-off valve 5 is operated by a coil spring 57 stretched between a spring seat 56 that protrudes upward from the protrusion and is pivotally connected to this protrusion, and the above-mentioned step 54.
2 is always spring-biased upward (in the valve closing direction).

On the other hand, a rotating member 59 is provided which is pivotally connected to the pivot shaft 58, and the inner end 59a of this rotating member 59 is brought into contact with the upper end of the above-mentioned valve operating rod 53, and the outer end 59b of this rotating member 59 is The rotating member 59 is made to protrude outside the bottle through the openings 60, 61 of the lower end 51 and the upper end 48, and when the outer end 59b of the rotating member 59 is pressed in the direction of arrow b in FIG. 4 during pouring, the rotating member 59 is rotated counterclockwise about the pivot shaft 58 as a fulcrum, and the inner end 59a of the rotary member 59 pushes down the valve operating rod 53 and the on-off valve 52, thereby discharging the hot water etc. previously stored in the inner container 42. The fluid can be poured through the fluid passage 50 and the spout 43.

However, in the above-mentioned plug structure, the on-off valve 52
In addition to having a structure in which the valve itself reciprocates in a straight line in the vertical direction, it is necessary to push down the upper end of the valve operating rod 53 formed integrally with this on-off valve 52 with good operability of the L-shaped rotating member 59. The entire valve operating mechanism becomes larger in the vertical direction, and the amount of upward protrusion of the stopper 47 from the mouthpiece 45 becomes large, which not only looks bad, but also increases the amount of resin raw material required especially for molding the top cover 48 and the like. It had some problems.

(c) Purpose of the invention This invention aims to reduce the space occupied by the entire valve operating mechanism in the vertical direction, and to reduce the amount of upward protrusion of the stopper from the mouthpiece, thereby improving the factory design. The purpose is to provide a stopper for a thermos flask that can.

(d) Structure of the invention This invention is a stopper for a thermos flask that is screwed onto the cap of a thermos flask, which is equipped with an outer container, an inner container, and a cap to close the upper opening of the inner container. The body is composed of an upper lid and a lower lid that fits into the upper lid, and an on-off valve is arranged at the bottom of the fluid passage of the lower lid,
A pivot pin is integrally formed at one end of the operation part integrally formed with the on-off valve, and the on-off valve is rotatably supported via the pivot pin pivoted on the lower cover, and the rear surface of the operation part is pivotally supported. It is characterized by being a stopper for a thermos flask equipped with an operating rod that is operated from the outside.

(e) Effects of the invention According to this invention, the above-mentioned on-off valve is configured to rotate about a pivot pin at one end of the operation part formed integrally with the on-off valve, and the rear surface of this operation part is connected to the above-mentioned Since it is only necessary to press the operating rod in the horizontal direction, the entire valve operating mechanism can be accommodated within the total height of the on-off valve and the operating section.

As a result, the space occupied by the entire valve operating mechanism in the vertical direction is reduced, and the amount of upward protrusion of the stopper from the mouthpiece can be reduced, thereby improving the design. can.

(F) Embodiment of the invention An embodiment of the invention will be described below in detail based on the drawings.

The drawing shows the stopper of a thermos flask, and in Figure 1,
This thermos flask 1 has a metal cylindrical outer container 2, an inner container 3 as a vacuum double-walled heat-insulating bottle made of glass, a spout 4 on the front end side, and a handle 5 on the back side made of heat-resistant synthetic resin. and a base portion 6 formed therein.
A plug 8 is inserted into the screw hole of the annular wall 7 at the center of the cap 6.
This plug body 8 closes the upper end opening 3a of the inner container 3 described above.

As shown in FIGS. 2 and 3, the above-mentioned plug body 8 includes a flat cap-shaped upper lid 9 and a lower lid 12 having an annular protrusion 11 that fits into an annular groove 10 on the inner circumference of the upper lid 9. ing. Each of these lids 9, 12 is made of heat-resistant synthetic resin.

The lower lid 12 has an opening 13 communicating with the inner container 3 on its lower surface, a spout hole 14 on its front end surface corresponding to the spout 4, and the opening 13 inside. A fluid passage 15 communicating with the spouting hole 14 is formed, and a spiral (not shown) is formed integrally on the outer circumferential surface to be threaded into the screw hole of the annular wall.

A substantially disk-shaped on-off valve 1 is provided at a position that closes the opening 13 in the lower part of the fluid passage 15 described above.
6 are installed.

This opening/closing valve 16 has a front wall plate 17, left and right side wall plates 18, 18 in an inverted L shape, and a back plate 19 that also serves as a spring seat and is stretched between the rear ends of these left and right side wall plates. The portion 20 is integrally formed, and pivot pins 21, 21 are integrally formed on the left and right sides of the side wall plates 18, 18 outward from the lower rear ends thereof.

By the way, two pin retaining pieces 22, 22 are integrally formed downward on the portions of the inner surface of the upper lid 9 that face the pivot pins 21, 21, and the lower ends of these left and right pin retaining pieces 22, 22 are formed integrally with each other. , pivot pin 2
Semicircular recesses 23 and 2 corresponding to the outer peripheral surfaces of 1 and 21
3 is formed.

Further, a pin-shaped spring guide 24 is provided to protrude downward from a portion of the inner surface of the upper lid 9 that faces the back plate 19.

On the other hand, the lower lid 12 forming the aforementioned fluid passage 15
The above-mentioned pin holding pieces 22, 22 are mounted on the horizontal wall 25 of
square holes 26, 26 through which the coil spring 27 is inserted, and an opening 28 through which the coil spring 27 is inserted.

Then, the operating section 20 is inserted into the fluid passage 15 through the opening 13 of the lower lid 12, and the operating section 20
After placing the pivot pins 21, 21 on the stepped portion 29 forming the fluid passage 15, the above-mentioned While holding the upper half of the pivot pins 21, 21, the spring guide 24 and the back plate 19
By tensioning a coil spring 27 between the upper surface and the upper surface, the above-mentioned on-off valve 16 is rotatably supported on the lower cover 12 via the above-mentioned left and right pivot pins 21, 21.

Furthermore, rod insertion holes 30, 31, and 32 are formed in the lower lid 12, the annular wall 7, and the upper end base of the handle 5, facing the back surface of the back plate 19 of the operation section 20, which are oriented in a straight line, respectively. ing.

In each of these rod insertion holes 30, 31, and 32, a linear operating rod 33 for horizontally operating the back surface of the operating section 20 described above from the outside is disposed, and a return rod wound around the rod 33 is disposed. Spring 34
Then, keep the rod 33 facing outward (toward the right in Figure 1).
It is spring biased.

Note that 35 and 36 in the figure are seal members made of silicone rubber.

The illustrated embodiment is configured as described above,
The action will be explained below.

Now, to open and close the on-off valve 16 at the bottom of the stopper 8, use the fingertips of the hand holding the handle 5 to move the aforementioned operating rod 33 that protrudes outward from the upper end of the handle 5 in the direction indicated by the arrow a in FIG. Press in the direction.

When the operating rod 33 is pressed in this way, the inner end of the rod 33 releases the back plate 1 as the back surface of the operating section 20.
9 is pressed, the operating portion 20 and the on-off valve 16 rotate counterclockwise around the pivot pins 21, 21 as fulcrums against the spring force of the coil spring 27, as shown in FIG. Opening 13 at the bottom of the lid 12
to open.

In this state, when the thermos flask 1 is tilted by holding the handle 5, the fluid such as hot water stored in the inner container 3 is poured through the above-mentioned opening 13, fluid passage 15, spout hole 14, and spout 4. The hot water can be poured sequentially.

By the way, the above-mentioned on-off valve 16 has a structure that rotates around a pivot pin 21 at one end of an operating section 20 integrally formed with the on-off valve 16 from heat-resistant synthetic resin.
In addition, since the back surface of the operating section 20 can be operated by pressing in the horizontal direction with the above-mentioned operating rod 33, the entire valve operating mechanism consisting of each element 16 to 21, 33, and can be accommodated within the total height of

As a result, the space occupied by the entire valve operating mechanism in the vertical direction can be reduced, and the amount of upward protrusion of the stopper 8 from the mouthpiece 6 can be reduced, resulting in an improved design. do.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a sectional view showing the stopper of a thermos flask, Fig. 2 is an exploded perspective view of the stopper, Fig. 3 is an explanatory view when the valve is open, and Fig. 4 is a sectional view showing the stopper of the thermos flask. FIG. 2 is a sectional view showing a conventional plug structure. 1...Thermos flask, 2...Outer container, 3...Inner container,
3a... upper end opening, 6... mouthpiece, 8... plug body,
9... Upper lid, 12... Lower lid, 15... Fluid passage,
16... Opening/closing valve, 20... Operating unit, 21... Pivoting pin, 33... Operating rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A stopper for a thermos flask, which is screwed onto the cap of a thermos flask and has an outer container, an inner container, and a cap to close the upper end opening of the inner container, Consisting of an upper lid and a lower lid that fits into the upper lid, an on-off valve is provided at the bottom of the fluid passage in the lower lid, and a pivot pin is integrally formed at one end of the operation part that is integrally formed with this on-off valve. A stopper for a thermos flask, wherein the opening/closing valve is rotatably supported via a pivot pin pivotally connected to a lower lid, and an operating rod is provided for operating the rear surface of the operating section from the outside.