JPS6227808B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric water heater such as an air pot, and an object of the present invention is to improve the airtightness of the inner container and to prevent incorrect attachment of the packing.

Conventionally, this type of electric water heater has sealed the inner container by fixing packing to the inner lid that covers the top opening of the inner container, but when the packing deteriorates, the inner lid must be replaced as well. However, the service quality was poor. On the other hand, there were some models with removable packing, but the cross section was approximately L.
It is difficult to make its outer circumferential surface adhere uniformly to the inner container, and when air is forced into the inner container when pouring hot water, air leaks from the gap between the packing and the inner container. However, there were cases where the amount of hot water poured out was small. Furthermore, even if the packing is installed upside down on the inner lid, it is difficult for the user to detect if the packing is installed incorrectly, and the situation continues to be difficult to pour out hot water due to air leakage.

The present invention improves the sealing performance of the inner container by improving the shape of the packing, and also makes it easier to detect incorrect attachment of the packing to prevent use in the incorrectly attached state. Examples will be described with reference to the accompanying drawings.

In the figure, 1 is a cylindrical body, 2 is a body 1
This is the spout body placed on the. A spout flange 3 projecting inward is formed at the lower end of the inner wall of the spout body 2. Reference numeral 4 denotes a bottomed cylindrical inner container, and an upper end flange 5 formed at the upper end is placed on the spout flange 3 via a spout packing 6. 7 is a resin inner lid that covers the upper opening of the inner container 4;
A hanging annular rib 8 and an outwardly extending outer periphery flange 9 are formed on the outer periphery. Reference numeral 10 denotes an inner cover fixed to the lower surface of the inner cover 7, and a supporting portion 11 is formed on the outer periphery of the inner cover 7 so as to be located below and parallel to the outer peripheral flange 9 of the inner cover 7. 12
is a valve provided between the inner lid 7 and the inner lid cover 10 to prevent hot water from flowing out in the event of a fall; one end is connected to the inner container 4.
A water pumping pipe 12' facing the inner bottom of the body 1 is connected to the body 1, and a water filling pipe 13 having one end facing the outside of the body 1 is connected thereto. 14 is a packing made of silicone rubber attached to the inner lid 7, and this packing 1
Reference numeral 4 denotes a tensioned part 15 that is tensioned on the outer peripheral surface of the annular rib 8 of the inner lid 7, and a horizontal part 16 that extends outward from the lower end of this tensioned part 15 and is supported by the support part 11 of the inner lid cover 10. , an abutment part 17 having a C-shaped cross section continuous to the outer peripheral end of the horizontal part 16, an upper abutment part 19 protruding upward from the tip of the abutment part 17, and an inward part from the tip of the abutment part 17. It is formed by integrally forming a protruding inner abutting portion 8. Reference numeral 20 denotes an upper lid provided on the spout main body 2, with one end pivoted to one side of the spout main body 2 and the other end detachably locked to the other side of the spout main body 2, and a push plate. 21, an air valve 22, a bellows 23, etc.

In addition, the packing 14 has a tension part 15 and a horizontal part 1.
6 forms an angle of 90° or more, and the annular rib 8 of the inner lid 7
When the packing 14 is attached to the outer circumferential surface of the annular rib 8, the elastic force of the silicone rubber brings the tension portion 15 into pressure contact with the outer circumferential surface of the annular rib 8, and the annular rib 8 is kept airtight.

In the above configuration, when the upper lid 20 is closed, the packing 14 has the lower end of the contact part 17 pressed against the upper end of the upper end flange 5 of the inner container 4, and the outer peripheral end of the contact part 17 contacts the inner peripheral surface of the spout main body 2. The upper abutting portion 19
comes into contact with the lower surface of the outer peripheral flange 9 of the inner lid 7, and further, the inner abutment part 18 contacts the upper end part of the tension part 15,
The inner container 4 is reliably sealed.

Next, as shown in FIG. 4, the packing 14 is
When attached to the annular rib 8 in the reverse state, the contact part 17 of the packing 14 rises to the upper end of the spout body 2, and the outer peripheral end of the outer periphery flange 9 of the inner lid 7 and the inside of the spout body 2 The gap between the upper end of the circumferential surface and the contact portion 17
Since the inner lid 7 is not lowered to a predetermined position and the abutting portion 17 protrudes, the user can easily detect if the packing 14 is incorrectly attached. Therefore, packing 1
There is no way to continue using the electric water heater in a state where the inner container 4 cannot be sealed because the inner container 4 is installed incorrectly.

As is clear from the above description, according to the present invention, by improving the packing, the sealing performance of the inner container is improved, and even if the packing is installed incorrectly, it can be easily detected, and the electric water heater is not used even if the packing is installed incorrectly. This can be prevented from happening.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an electric water heater showing an embodiment of the present invention, Fig. 2 is a sectional view of the main parts, Fig. 3 is a sectional view of the packing of the electric water heater, and Fig. 4 is a sectional view of the packing. FIG. 3 is a cross-sectional view of main parts when incorrectly attached. 2... spout body, 3... spout flange, 4...
Inner container, 5... Upper end flange, 7... Inner lid, 8...
... Annular rib, 9 ... Outer flange, 10 ... Inner lid cover, 11 ... Support part, 14 ... Packing,
15...Tension part, 16...Horizontal part, 17...Abutment part, 18...Inner abutment part, 19...Upper abutment part.

Claims (1)

[Claims] 1. A spout body having a spout flange protruding inward at the lower end, a bottomed cylindrical inner container with an upper end flange placed on the spout flange, and an inner lid that covers the top opening of the inner container. , an inner lid cover fixed to the lower surface of the inner lid, and a packing that is detachably attached to the inner lid and the inner lid cover and comes into contact with the upper end flange or the spout body, and the inner lid has an annular rib and an outer periphery flange is formed, and a substantially parallel support part is formed on the inner lid cover located below the outer periphery flange, and the packing includes a tension part tensioned on the outer peripheral surface of the annular rib and a lower end of the tension part. a horizontal portion extending outward and supported by the support portion of the inner lid cover; a contact portion having an inverted C-shaped cross section continuous to the outer peripheral end of the horizontal portion; and a contact portion extending from the contact portion. An electric water heater that is integrally formed with a projection that continuously projects upward and inward.