JPS588181Y2 - electric cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric cooker equipped with an electronic control circuit unit and the like for controlling the amount of heat generated by a heating element.

Recently, many electric cooking devices such as rice cookers and warmers are equipped with an electronic control circuit unit to control the amount of heat generated by the heating element, but this electronic control circuit unit takes into account thermal effects. It is generally installed at the bottom of the main body.

At this time, in consideration of electrical insulation, voltage resistance, etc., the electronic control circuit unit was housed in a synthetic resin type circuit storage box installed below the metal main body, and this was covered with a metal backing plate.

However, in conventional configurations of this type, when conducting insulation tests and withstand voltage tests during the manufacturing process, it was necessary to test the main body and the back plate separately, which was a complicated process. .

The present invention has a simple structure that allows the above-mentioned test to be conducted in one go, and will be described below with reference to the attached drawings showing one embodiment of the present invention when used in a pressure cooker.

In the figure, 1 is a cylindrical metal main body, 2 is a heating element installed inside the main body 1 via a protective frame 3, 4 is a cooking device that is removably placed on the heating element 2, and 5 is a backing 6 7 is a lid that airtightly covers the upper opening of the cooking container 4, 7 is a weight-type first safety valve to prevent danger such as explosion in the event that an abnormality occurs and the pressure inside the cooking container increases abnormally, and 8 is a lid that airtightly covers the upper opening of the cooking container 4. A melting type second safety valve using a eutectic alloy; 9 is a locking safety lever that lifts up the weight to prevent the pressure of the cooking container 4 from increasing when the cooking container 4 and the lid 5 are not fully fitted; 10 is a locking safety lever of the main body 1; Legs 11 that support the main body 1 are integrally formed with a synthetic resin lower frame attached to the lower opening.

Reference numeral 12 denotes a control circuit unit equipped within the lower frame 10, which is equipped with a semiconductor control element that receives a signal from the heat-sensitive device 13 and controls the amount of current applied to the heating element 2-\.

Reference numeral 14 denotes a metal back plate that covers the lower opening of the lower frame 10, and is detachably attached to the lower frame 10 with screws 15 and 16.

A heat shield plate 17 covers the upper part of the lower frame 10 and serves to provide thermal protection for the control circuit unit 12 and to catch water in case water leaks from the center of the protective frame.

As shown in FIG. 2, a protrusion 18 is integrally formed on a part of the outer periphery of the back plate 10, and a notch into which the protrusion 18 fits is formed on a part of the leg 11. 19 is formed, and the screw 15 is inserted into the screw hole provided in the protrusion 18 and the leg 1.
It is attached to the main body 1 by passing through a screw hole provided in 1.

In the above configuration, insulation and withstand voltage tests in the manufacturing process can be easily carried out by bringing one electrode into contact with the back plate 14.

That is, the metal main body 1 and the back plate 14 are electrically connected by the screws 15, and there is no need to perform separate tests on the main body and the back plate.

Note that the lower frame 10 is screwed to the main body 1 using three legs, and even if the screws 15 that also serve as fixing the back plate 14 are removed, it will not be separated from the main body 1, but only the back plate 14 will be separated. This is convenient for assembly processes and repair services.

As is clear from the above description, according to the present invention, insulation and withstand voltage tests can be easily performed in the manufacturing process with a simple configuration, and mass productivity is improved.

Additionally, since only the back plate can be removed, it is easier to assemble and repair the electrical components built into the lower frame, which provides excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an electric cooker showing an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the main parts. 1... Body, 2... Heating element, 4...
... Cooking container, 10 ... Bottom frame, 12 ...
...Electrical parts, 14... Back plate, 15.16...
····Screw.

Claims (2)

[Scope of utility model registration request] (1) A cylindrical metal body with a built-in heating element that heats the cooking container, a lower frame made of electrically insulating material that houses electrical components installed in the lower opening of this body, and the lower surface of this lower frame. and a metal back plate that covers the opening, the back plate is removably attached to the lower frame with screws, and at least one of the screws penetrates the lower frame and is screwed directly to the main body. Characteristic electric cooker. (2) The lower frame is integrally formed with a bottom-shaped leg supporting the main body, and the leg is provided with a notch into which a protrusion integrally formed on the outer periphery of the back plate fits, The electric cooking appliance according to claim 1, wherein the screws that are directly screwed are attached to the main body by passing through the protrusion and the leg.