JPS6310112Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to an electric kettle with improved operability of opening and closing the lid.

Technical background of the invention and its problems Traditionally, the inner lid of an electric rice cooker was placed in strong pressure contact with the pot to prevent steam leakage during cooking, so a considerable amount of force was required to close the inner lid. can be,
This made the operability worse.

Purpose of the invention The present invention has been developed by focusing on the above points, and by forming the spring member that presses down the inner lid from a shape memory alloy, the inner lid can be used to cook rice with the same force as before. The object of the present invention is to provide an electric rice cooker which has improved operability by being pressed against the pot with a weak force except when cooking rice.

Summary of the invention The present invention is characterized in that the spring member that presses the inner lid is made of a shape memory alloy.

Embodiment of the invention An embodiment of the invention will be described below with reference to the drawings.

Reference numeral 1 denotes the main body of the electric kettle, which is composed of a cylindrical outer frame 2 and an inner frame 3 supported within the outer frame 2. Reference numeral 4 denotes an outer cover that is pivotally supported on the upper part of the main body 1 by a hinge device (not shown).A spring 6, which is a spring member made of a shape memory alloy, is attached to the inside of the outer cover 4 by a fixing fitting 5. The elastic force causes the inner lid 8 to be pressed against the pot 9 via the lid heater 7, thereby preventing leakage of steam from inside the pot 9 during rice cooking.

In the above configuration, the spring 6 is made of a shape memory alloy, and by setting the transformation temperature to about 90 degrees, the spring 6 memorizes the expanded state and is deformed to the contracted state. Therefore, when the temperature is low, it is in a contracted state, and when the transformation temperature is reached, it returns to the memorized expanded state, thereby pressing the inner lid 8 with a stronger elastic force during rice cooking, effectively preventing steam leakage.

According to the above embodiment, the spring member is simply made of a shape memory alloy, and the elastic force is weak at low temperatures and strong at high temperatures, so the force to close the inner lid is weak at low temperatures. This allows you to press the inner lid with sufficient force when cooking rice.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications within the scope of the invention.

Effects of the invention As is clear from the above explanation, in the present invention, the spring member that presses the inner lid is made of shape memory alloy, so the opening and closing operations of the lid are easy, and the inner lid is sufficiently sealed during rice cooking. This has excellent practical effects.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. In the figure, 4 is an outer lid, 6 is a spring (spring member),
8 is an inner lid, and 9 is a pot.

Claims (1)

[Claims for Utility Model Registration] 1. A rice cooker comprising: a pot for storing food to be cooked; an inner lid that covers the top opening of the pot; and a spring member that presses the inner cover against the pot; An electric kettle characterized in that its members are made of a shape memory alloy. 2. The electric kettle according to claim 1, wherein the spring member is set to expand when the temperature is high.