JPH0317811Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to liquid containers such as thermos flasks, electric pots, and water bottles, and more specifically to liquid containers equipped with a manual pump for pumping up liquid. .

(Prior Art and Purpose of the Invention) Conventionally used liquid containers equipped with a manual pump for pumping liquid are those in which pressurized air from a bellows pump is applied to the surface of the liquid inside the container, and the air pressure is used to pump the liquid. It is a type that is discharged externally. However, this type of liquid container has a complicated structure and is expensive, and the bellows pump takes up space, making it difficult to make the liquid container more compact.

An object of the present invention is to provide a pump-type liquid container that solves the problems of the conventional example.

(Structure of the invention) In order to achieve the above object, the present invention uses a plug made of a hollow case body as a cylinder, arranges a sliding piston inside the cylinder, and creates a pump chamber surrounded by the piston and cylinder. The pump chamber and the pumping pipe are connected via a check valve that allows liquid to flow into the pumping chamber through the pumping pipe; The piston is connected via a check valve that allows the flow of liquid to flow out of the piston, and the piston is configured to be operable from the outside.

(Embodiment) A first embodiment of the present invention shown in FIGS. 1 to 4 relates to a thermos flask. An inner container 2 made of a vacuum double glass bottle is disposed inside the outer case 1, and its mouth 3 contacts the lower surface of the top of the outer case 1 via a gasket 4, while its bottom 5 contacts the bottom case 6.
It is pushed up by a push-up screw 7 screwed into.

A stopper 8 that closes the bottle opening 3 of the inner container 2 is made of a hollow case body, and the inner wall of the stopper 8 forms a cylinder wall. The piston 9 slides within the cylinder 10 and forms a pump chamber 11 surrounded by the piston 9 and the cylinder 10. A discharge pipe 12 is connected to the pump chamber 11 in the upper part of the plug body 8 and extends laterally and bent downward, and a discharge pipe 12 is connected to the pump chamber 11 in the inner container 2 at the lower part thereof. Extending pumping pipes 13 are connected to each other.

In this embodiment, the stopper 8 is placed inside a cylinder 10.
a plug main body 14 having a connecting pipe part 15 connected to the pumping pipe 13, a movable body 17 having a connecting pipe part 16 connecting to the discharge pipe 12 and having a piston 9 formed therein; It consists of a cap body 18 that removably fixes the main body 14. The cap body 18 has a female screw 21 that is screwed into a male screw 20 of an upper end cylindrical portion 19 provided on the outer case 1. When screwed, the upper end flange 22 of the stopper main body 14 is held between the cap body 18 and the upper end cylindrical portion 19, and the stopper main body 14 is fixed. The movable body 17 is a compression spring 2 disposed inside the pump chamber 11.
3. It is urged upward by 3. Further, a seal packing 29 is fixed to the piston 9 for sealing with the cylinder 10.

A check valve 24 as shown in FIGS. 1 and 2 is formed in the connecting pipe portion 16 of the movable body 17. As shown in FIGS.
This check valve 24 includes a floating valve body 25 in the form of a thin plate, a valve seat ring 26 that also serves as a stopper to prevent the floating valve body 25 from moving downward, and a valve seat ring 26 that restricts the upward movement of the floating valve body 25 but ensures the flow of liquid. A plurality of ribs 27, 27...
..., from the pump chamber 11 to the discharge pipe 1
2, while allowing the flow of liquid to flow in the opposite direction. In addition, 28, 28 are notches provided in the floating valve body 25, and these notches 28, 2
8, the liquid accumulated in the pumping pipe 12 and the connecting pipe portion 16 is gradually returned to the pump chamber 11.

A check valve 30 as shown in FIGS. 1 and 3 is formed in the connecting pipe portion 16 of the plug body 14. As shown in FIGS.
This check valve 30 includes a thin plate-shaped floating valve body 31, and a stopper ring 33 equipped with a plurality of inward protrusions 32, 32, . , a valve seat portion 34,
It functions to allow the flow of liquid flowing into the pump chamber 11 through the pumping pipe 13, while restricting the flow in the opposite direction. In addition, 35, 35 is the floating valve body 3
The liquid accumulated in the pump chamber 11 is gradually returned to the pumping pipe 13 through the notches 35, 35.

Next, the operation of the above embodiment will be explained based on FIG. 4. However, for convenience of explanation, notches 28, 28, 3 provided in floating valve bodies 25, 31 of both check valves 24, 30
Let us ignore the effects of 5 and 35.

In the state shown in FIG. 4, liquid has accumulated in the pump chamber 11. In this state, as shown in FIG. 4, when the discharge pipe 12 is pushed down and the piston 9 is moved downward, the liquid in the pump chamber 11 flows out to the discharge pipe 12 side through the upper check valve 24 and is injected to the outside. Served. At this time, the lower check valve 30 is closed.

After the liquid has been poured out to the outside as described above, when the hand is released from the discharge pipe 12, the piston 9 moves upward due to the restoration of the compression spring 23, as shown in FIG. Therefore, the pump chamber 11 becomes a negative pressure, and the lower check valve 30 opens, so that the liquid in the inner container 2 is pumped up into the pump chamber 11 through the pumping pipe 13. At this time, the upper check valve 24 is closed. When the piston 9 returns to its original position, the state shown in FIG. 4 is reached.

In the first embodiment, the discharge pipe 12 is connected to the piston 9.
The structure is such that the liquid in the inner container 2 can be pumped up by operating the discharge pipe 12, which is advantageous in terms of simplifying the structure.

A second embodiment of the present invention shown in FIG. 5 has a discharge pipe 12 (1
It consists of a pair of pipes 12a and 12b. ), and an operating handle 37 that protrudes outside is attached to the movable body 17 provided with the piston 9. This operating handle 37 is formed so that the liquid container can be carried in a suspended state, and the operating handle 37 is
The shaft portion 39 of the movable body 17 is configured to be housed in a support tube 38 provided on the movable body 17, as shown by the imaginary line.

The stopper 8 is seated on the opening periphery 41 of the lower mouth member 40 to close the bottle opening 3 of the inner container 2, but the lid 36 screwed onto the upper end of the outer case 1 is tightened. Therefore, it is fixed in that position. A cylindrical portion 42 provided at the center of the lid body 36 serves as a guide for the shaft portion 39 of the operating handle 37.

A check valve 24 is provided at the connection between the pump chamber 11 and the discharge pipe 12 to allow the flow of liquid from the pump chamber 11 to the discharge pipe 12. This check valve 24 is constituted by a reed valve 43 and its valve seat portion 44, which open as shown in phantom lines when the pressure in the pump chamber 11 increases due to the pressure in the discharge pipe 12. In addition, 45 is the lid body 36
This is a cap body disposed on the bottom surface of the stopper body 14 for closing the stopper body 14.

Although the second embodiment has the above-mentioned distinctive configuration, the other configurations are basically the same as those of the first embodiment, so the common reference numerals are used in FIG. 5 and the explanation thereof will be omitted.

The present invention can be configured in various ways other than those shown in the above embodiments. For example, the aspects of the check valves 24 and 30 are not limited to those shown in the above embodiments, but can be configured in the third embodiment shown in FIG. Ball 46 and valve seat 47 as shown
Furthermore, the present invention can be applied to liquid containers other than thermos flasks, such as electric pots and water bottles.

(Effects of the invention) Since the present invention has the above configuration, it can produce the following effects.

A pump-type liquid container can be configured with a simple structure of two check valves, a piston and a cylinder, and a means for operating the piston. Since the pump chamber is surrounded by the cylinder, the entire volume of the hollow part of the stopper can be used as the pump chamber, and although it has a simple structure that keeps costs down, it is possible to pump enough volume per pump. We can provide a top pump type liquid container.

Since the bellows pump in the conventional example is not required, the liquid container can be configured compactly.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view of the first embodiment of the present invention, Figs. 2 and 3 are perspective views showing the main components disassembled and partly longitudinally cut, Fig. 4. 5 is a partially cutaway longitudinal side view of the second embodiment of the present invention, and FIG. 6 is a longitudinal sectional side view of the main part of the third embodiment of the present invention. 8...Plug body, 9...Piston, 10...Cylinder, 11...Pump chamber, 12...Discharge pipe, 1
3... Pumping pipe, 24, 30... Check valve.

Claims (1)

[Scope of utility model registration request] A plug body made of a hollow case body is used as a cylinder, a sliding piston is arranged inside this cylinder, a pump chamber is formed surrounded by this piston and cylinder, and this pump chamber and a pumping pipe are connected to each other as a pumping pipe. The pump chamber and the discharge pipe are connected via a check valve that allows liquid to flow out from the pump chamber to the discharge pipe. A pump-type liquid container configured to be connected to the piston and to be able to operate the piston from the outside.