JPH041870Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a water pump for guiding the liquid content of an air pot to a spout.

FIG. 3 shows an air pot, in which a vacuum double bottle 2 is housed in an exterior body 1, and a lid 4 containing an air pump 3 is provided on the top of the exterior body 1. A push button 5 for operating the air pump 3 is provided at the center of the lid 4.

A spout 6 is formed in the front part of the exterior body 1 , and the spout 6 communicates with the upper opening of the vacuum double bottle 2 at the upper part of the exterior body 1 via a liquid passage 7 . A pumping pipe 8 is attached to the inner end of the liquid passageway 7.

The lift pipe 8 has a substantially L-shaped adapter 10 attached to the upper part of the lift pipe main body 9, which is a metal pipe, and a cap 1 made of an elastic material such as rubber at the lower end.
1 is fitted. and the adapter 10
The pump main body 9 is detachably fitted to the end of the liquid passageway 7 through the cap, and the pump main body 9 extends downward inside the vacuum double bottle 2, and the cap 11 is located almost at the bottom of the vacuum double bottle 2. There is.

A heat-insulating plug 12 is attached to the center of the lower surface of the lid 4, and the plug 12 has a recess 13 into which the adapter 10 of the pumping pipe 8 fits. At times, while the adapter 10 is fitted into the recess 13, the stopper 12 is fitted into the upper opening of the vacuum double bottle 2 to prevent heat dissipation.

When the push button 5 is pressed with the lid 4 closed on the exterior body 1, the air pump 3 is activated to feed air into the vacuum double bottle 2, and the air inside the vacuum double bottle 2 is The content liquid is pushed up through a water lift pipe 8 by air pressure, passed through a liquid passage 7, and is poured out from a spout 6.

BACKGROUND ART A conventional water pump 8 has a convex portion 1 on the outer periphery of a water pipe main body 9 at its lower end, as shown in FIG.
4 is formed, and a recess 15 is formed on the inner periphery of the cap 11, and the protrusion 14 is connected to the recess 1.
5, the cap 11 is held against the pump body 9. and cap 11
A stepped portion 16 into which the lower end of the lift pipe main body 9 fits is formed on the inner periphery of the lower end, and the step portion 16 prevents the lower end of the lift pipe main body 9 from penetrating the cap 11 and being exposed. .

Problems to be Solved by the Invention However, in the structure described above, since the lower end of the lift pipe 8 is immersed in the liquid content during use, there is a gap between the lift pipe main body 9 and the cap 11. It is easy for liquid to penetrate and it is easy to slip on each other. Therefore, when an external force is applied to the cap 11, the cap 11 easily falls off from the lift pipe body 9, or conversely, the cap 11 slides up above the lift pipe body 9, and the lower end of the lift pipe body 9 is exposed from the cap 11. There are many things that happen. If the lower end of the lift pipe body 9 is exposed, when the lift pipe 8 comes off the liquid passage 7 and falls into the vacuum double bottle 2, the metal lift pipe body 9 will fall into the glass vacuum double bottle 2. 2, there is a risk that the vacuum double bottle 2 will burst.
Extremely dangerous.

Furthermore, if the lid 4 is accidentally closed while the lift pipe 8 has come off the liquid passage 7 and fallen into the vacuum double bottle 2, the stopper 12 will hit the upper end of the lift pipe 8, causing the lift pipe 8 to be pushed downward strongly. pushed by. Therefore, cap 11
Even when the pump is properly fitted to the lower end of the lift pipe body 9, the lower end of the lift pipe main body 9 may protrude through the cap 11 and break the vacuum double bottle 2.

The present invention has been developed in view of the above circumstances, and improves the structure of the fitting portion between the lift pipe body 9 and the cap 11, so that the cap 11 can slide up along the lift pipe body 9. The tip of the vacuum bottle 2 will not be exposed, and even if the lid 4 is closed with the water pump 8 removed from the liquid passage 7, the cap 11 will act as a cushion and the vacuum double bottle 2 will not be damaged. The purpose of this invention is to provide a new water pump 8.

Means for Solving the Problems The present invention provides a lifting pipe which is detachably attached to the air pot main body or inner lid and has a cap made of an elastic material fitted to the lower end thereof. At the same time, a convex portion is formed on the outer circumference slightly above the flange, a concave portion that fits into the convex portion is formed on the upper inner circumference of the cap, and a convex portion is formed on the lower inner circumference of the concave portion. The present invention is characterized in that a groove into which the flange fits loosely and is sufficiently longer than the thickness of the flange is formed, and the flange is positioned at the upper end of the groove.

FIG. 1 shows the tip of the lift pipe 8 of the present invention, in which a flange 17 that expands outward is formed at the lower end of the lift pipe main body 9, and a flange 17 slightly above the flange 17 is formed at the lower end of the lift pipe main body 9. A convex portion 14 is formed on the outer periphery of.

The cap 11 is made of a rubber-like elastic material such as silicone rubber, and has a recess 15 formed on its upper inner periphery to fit into the protrusion 14 of the pump main body 9. A concave groove 18 into which the flange 17 of the lift pipe main body 9 fits loosely is formed around the circumference. The groove 18 is sufficiently longer than the thickness of the flange 17 in the vertical direction.

When the cap 11 is properly fitted into the lift pipe main body 9, the flange 17 of the lift pipe main body 9 is attached to the cap 1, as shown by the solid line in FIG.
It is located at the upper end of the groove 18 of No. 1.

Function Since the present invention has the above-mentioned configuration, even if the content liquid enters between the lift pipe main body 9 and the cap 11 and slippage occurs, the relative movement of the two will be prevented by the flange. 17 is limited to the extent that it can move within the groove 18. Therefore, the cap 11 will not fall downward from the lift pipe main body 9, and even if it moves upward, if the flange 17 contacts the lower part of the groove 18 as shown by the chain line in FIG. Cap 11 cannot be moved upwards.

Furthermore, if the lid 4 is suddenly closed with the lift pipe 8 falling out of the liquid passage 7, the stopper 12 will push down the lift pipe 8 as described above, but at that time, the groove 18 at the lower end of the cap 11 will The impact is alleviated by deforming. Further, as mentioned above, since the lower end of the lift pipe main body 9 does not protrude from the cap 11, the lift pipe main body 9 does not break through the vacuum double bottle 2.

Furthermore, according to the present invention, even if the tip of the lift pipe body 9 is exposed from the cap 11 for some reason and the exposed lift pipe body 9 collides directly with the vacuum double bottle 2, The tip of the lift pipe main body 9 is bent outward to form a flange 17, and since the flange 17 comes into contact with the vacuum double bottle 2, the shock is absorbed by the spring elasticity of the flange 17. The vacuum double bottle 2 will not break.

Effects of the invention Therefore, according to the invention, the tip of the lift pipe main body 9 is not exposed from the cap 11, and even if it is exposed, the impact when it collides with the vacuum double bottle 2 is small. Even if the lid 4 is closed with the lift pipe 8 falling off the liquid passage 7, the cap 11 acts as a cushion, so that no direct impact is applied to the vacuum double bottle 2, and the tip of the lift pipe main body 9 is closed. It is extremely safe because the vacuum double bottle 2 will not be broken due to strong collision with the vacuum double bottle 2.

Embodiment FIG. 2 shows an embodiment of the present invention.
A tubular portion 19 is integrally extended below the flange 17 of the cap 11. According to this embodiment, all the effects of the structure shown in FIG. When the lid 4 is closed with the water lift pipe 8 having fallen off from the liquid passage 7, the water pipe body 9 can be moved downward as the tubular portion 19 is elastically deformed and bent. The lid 4 can be closed with almost no force being applied to the vacuum double bottle 2, and there is no fear that the vacuum double bottle 2 will break.

[Brief explanation of drawings]

FIG. 1 is a central longitudinal cross-sectional view of the main part of the lift pipe of the present invention, and FIG. 2 is a central longitudinal cross-sectional view of the main part of the lift pipe of the embodiment of the present invention. FIG. 3 is a central longitudinal sectional view of an air pot to which the lifting pipe of the present invention is applied, and FIG. 4 is a central longitudinal sectional view of the main part of a conventional lifting pipe. 8... Lifting pipe, 9... Lifting pipe body, 11... Cap, 14... Convex portion, 15... Concave portion, 17...
Flange, 18...concave groove.

Claims (1)

[Scope of utility model registration request] In a lift pipe that is detachably attached to the air pot body or inner lid and has a cap made of an elastic material fitted to the lower end thereof, a flange that expands outward is formed at the lower end of the lift pipe body, and the flange of the flange is A convex portion is formed on the outer periphery of the upper portion, a recess portion that fits into the convex portion is formed on the inner periphery of the upper portion of the cap, and the flange is loosely fitted to the lower inner periphery of the recess, and the thickness of the flange is smaller than the thickness of the flange. 1. A water pumping pipe for an air pot, characterized in that a groove is formed with a sufficiently long length, and the flange is positioned at an upper end of the groove.