JPS631949Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of the invention The present invention relates to a structure for mounting the inner lid of an electric air pot.

(b) Conventional technology and its problems Conventional electric air pots heat the liquid inside the container with an electric heater installed in the metal container, and also use an air pump built into a lid that can be opened and closed at the top of the container. When operated, pressurized air is sent into the container and water is supplied to the outside via the water supply pipe.

Incidentally, the upper end opening of the container is closed with a metal inner lid to prevent the lower surface of the lid from being directly thermally damaged by the heat generated by the steam inside the container. However, since the inner lid is simply placed on the top of the container, it has the drawback of requiring the effort of opening the lid and removing the inner lid twice when refilling the container with water. . Additionally, if the inner lid is not placed accurately on the top of the container, liquid may leak from between the container and the inner lid if the air pot is accidentally tipped over, or air may leak when the air pump is operated. There was a problem.

(c) Purpose of the invention The present invention was made in view of the above-mentioned conventional problems, and its purpose is to make it possible to open the inner lid as well when the lid is opened, and to easily open the inner lid from the lid. To provide a mounting structure for an inner lid of an electric air pot, which allows the inner lid to be removed quickly and to accurately bring the inner lid into close contact with the upper surface of the container.

(d) Structure of the device In order to achieve the above object, the present invention provides a concave-convex fit between the upper surface fitting portion of the seal packing attached to the outer periphery of the inner lid and the fitting portion provided on the lower surface of the outer periphery of the lid body. The inner lid is attached to the bottom surface of the lid body by fitting the lid together.

(E) Description of Embodiments FIGS. 1 to 3 show a first embodiment of an electric air pot according to the present invention, in which a metal container 3 wrapped with a heat insulating material 2 is placed inside a metal exterior body 1. It is stored. A band heater 4, which is an example of an electric heater, is wrapped around the outer periphery of the bottom of the container 3, and one opening 5 is bored in the bottom surface of the container 3. One end of a connecting pipe 6 is welded to this opening hole 5, and a water supply pipe 8 and a water level pipe 11 are connected to the other end of the connecting pipe 6 via a branch pipe 7. The upper end of the water supply pipe 8 is connected to a spout 10 via a safety valve 9, while the upper end of the water level pipe 11 communicates with the upper part of the container 3. The water level tube 11 is made of a transparent material such as glass, and the water level inside the water level tube 11 can be visually observed through a display window (not shown).

Reference numeral 12 denotes a shoulder body placed and fixed on the upper end of the exterior body 1, and the rear end support shaft 13 of this shoulder body 12 allows the lid body 1 to be
4 can be opened and closed freely, and an air pump 16 that can be expanded and contracted by the pressing operation of a pusher body 15 is housed inside the lid body 14. This air pump 16
is attached to the lid 14 by fitting its lower end claw portion 16a into the center through hole 14a of the lid 14, and the air supply port 16b of the air pump 16 faces the center of the bottom surface of the lid 14. . This air outlet 1
An annular rubber bush 17 is mounted inside the rubber bush 17, and the outer periphery of a bowl-shaped portion 17a integrally provided at the bottom of the rubber bush 17 is held by an annular wall 14b vertically provided on the lower surface of the lid 14.

Reference numeral 18 denotes a metal inner lid that closes the upper end opening of the container 3, and a vent hole 18a is formed in the center thereof. An annular seal packing 19 is attached to the outer periphery of the inner lid 18 and is in close contact with the upper end surface of the container 3, and a fitting groove 20 (fitting part) which is widened upward is provided in the upper part of the seal packing 19. The inner lid 18 is integrally formed with the lower surface of the lid 14 by fitting the protrusion 14c (fitting portion) vertically provided on the lower surface of the outer periphery of the lid 14 into the fitting groove 20. mounted on.

In addition, 21 is a water conduit which extends the spout 10 downward, 22 is a water conduit cover, 23 is a temperature regulator that detects the temperature of the bottom surface of the container 3, and 24 is a power supply plug.

In the electric air pot with the above configuration, the inner lid 1
8 to the lid body 14, attach the inner lid 18 to the container 3.
By placing it on the upper end opening and closing the lid 14, the protruding ridge 14c of the lid 14 is aligned with the seal packing 1.
Since it automatically fits into the fitting groove 20 of No. 9, it can be easily installed. When the lid body 14 is closed, the seal gasket 19 of the inner lid 18 is pressed against the upper end of the container 3, so that the reaction force causes the inner lid to close.
8 is pressed against the lower surface of the lid 14, and the bowl-shaped portion 17a of the rubber bush 17 is pressed and bent to form the inner lid 18.
Crimp the top surface of the Therefore, air pump 16
Air does not leak to the outside through the gap between the bowl-shaped portion 17a and the upper surface of the inner lid 18. At the same time, the protrusion 14c of the lid body 14 presses against the upper surface of the seal packing 19, so that the protrusion 14c and the seal packing 19 come into airtight contact, and the seal packing 19 is crimped to the upper end surface of the container 3, and the inner Air leakage from the gap between the lid 18 and the container 3 is also prevented.

In addition, if limescale etc. adhere to the inner cover 18, if the inner cover 18 is forcibly pulled out from the cover body 14, the protrusion 14c will fit into the fitting groove 2 of the seal packing 19.
Since it can be easily removed from 0, only the inner lid 18 can be cleaned.

Next, the operation of the electric air pot will be explained. First, when the air pump 16 is compressed, the pressurized air is sent into the container 3 through the rubber bush 17 and the vent hole 18a of the inner lid 18, and the liquid in the container 3 is pumped through the connecting pipe 6 and the water supply by the air pressure. Water is supplied to the outside via pipe 8. Now, if you continue to operate the air pump 16, the hot water in the container 3 will decrease, and when it decreases to a certain level, the air that entered through the upper end communication hole 11a of the water level pipe 11 will pass through the branch pipe 7 and enter the water supply pipe. 8, hot water will not be discharged even if the air pump 16 is operated. This level, that is, the residual water position L is at the same level as the installation position of the branch pipe 7, and is located at an intermediate position between the upper end surface and the lower end surface of the band heater 4. Therefore,
Even if the air pump 16 is operated too much, a certain amount of hot water always remains, so there is no need for the temperature of the container 3 to rise suddenly in the event of a malfunction of the temperature regulator 23, and the temperature of the container 3 is not necessarily increased rapidly even if the air pump 16 is operated too much. A thermal fuse (not shown) mounted on the outside can act to shut off the power supply.

Note that the electric heater is not limited to the band heater 4 wrapped around the bottom outer periphery of the container 3 as in the above embodiment, but may also be a thermistor or the like attached to the bottom surface of the container 3.

FIG. 4 shows a second embodiment of the present invention, in which the seal packing 19 is different from the first embodiment.
A protrusion 20 is provided on the upper surface of the lid body 14, and a fitting groove 14c into which the protrusion 20 fits is provided on the lower surface of the outer periphery of the lid body 14. In this case, only one protrusion 20 needs to be provided on the seal packing 19, so the seal rubber can be easily molded, and there is less risk of deformation or breakage of the seal rubber.

(f) Effects of the invention As described above, according to the invention, the inner lid is fitted with an uneven fit between the seal gasket attached to the outer periphery of the inner lid and the fitting part provided on the lower surface of the outer periphery of the lid. Since the lid is attached to the bottom of the lid, when the lid is opened, the inner lid can also be opened at the same time, which is very convenient when refilling the container with water. Furthermore, if the inner lid becomes dirty with limescale or the like, the inner lid can be easily removed from the lid body by forcibly pulling it out, so that the inner lid itself can be cleaned. Furthermore, when the lid is closed, the fitting part of the lid presses against the upper surface of the seal packing, so the sealing performance between the inner lid and the container is improved, and there is no risk of air leakage when the air pump is operated. In addition, since the inner lid is attached to the center of the lower surface of the lid body, when the lid body is closed, the inner lid tightly adheres to the top surface of the container, eliminating the risk of liquid leakage or air leakage.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an example of an electric air pot according to the present invention, FIG. 2 is a partially enlarged view thereof, FIG. 3 is a partially enlarged cross-sectional view of the inner lid and the lid body separated, and FIG. The figure is a partially enlarged sectional view of a second embodiment of the present invention. 3... Container, 4... Band heater, 8... Water supply pipe, 14... Lid, 14c... Projection, fitting groove (fitting part), 16... Air pump, 16b... Air supply port , 17...Rubber button, 18...Inner lid, 18
a...Vent hole, 19...Seal packing, 20...
...Fitting groove, protrusion (fitting part).

Claims (1)

[Scope of utility model registration request] By installing a lid equipped with an air pump on the top of the container equipped with an electric heater so that it can be opened and closed, and sending pressurized air into the container from the air pump,
In an electric air pot configured to supply water to the outside via a water supply means, a ventilation hole is provided in the inner lid that closes the upper end opening of the container, and an annular seal is provided on the outer periphery of the inner lid that tightly contacts the upper end opening of the container. At the same time as attaching the gasket, a fitting part is provided on the top surface of the seal gasket, and the air supply port of the air pump is exposed to the bottom surface of the lid, and the fitting part provided on the bottom surface of the outer periphery of the lid is used to seal the seal. An inner lid mounting structure for an electric air pot, characterized in that the inner lid is attached to the lower surface of the lid body by fitting the fitting part of the gasket into a concave-convex fit.