JPS59186526A - Rice cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention (d) relates to a rice cooker, particularly to the backing structure.

Conventional Structure and Problems According to various studies regarding rice cooking, it is said that the higher the rate of gelatinization of starch, the main ingredient of rice, the sweeter it is, the better the digestion and absorption, and the better the rice is cooked. .

This gelatinization is promoted by water and heat, and from a thermal point of view it is 10
It is said that it develops rapidly around 0°C and accelerates further when it exceeds 100°C. However, in order to raise the boiling point to 100'C or higher, it is necessary to increase the internal pressure inside the pot. Conventionally, a flexible comb backing was interposed between the inner lid peripheral edge and the tin layer edge to eliminate the gap between them. When the lid is opened and closed, force is applied from any direction, making the installation unstable and causing the original function of increasing internal pressure to be impaired. This can be slightly improved by making the inner diameter of the rubber backing smaller than the outer diameter of the inner lid, but in order to obtain a clear effect, increasing the difference will not make installation difficult, although it is an effective countermeasure. It was something that didn't exist. Alternatively, as shown in FIG. 3, bending the outer periphery of the inner lid 31 and attaching the backing 32 along the shape is good in terms of stability, but it is also difficult to attach.

OBJECTS OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has the object of providing a rice cooker that can effectively increase the internal pressure within the pot. To achieve this, the present invention includes a cylindrical pot with a bottom, an inner lid that covers the upper opening of the pot, and a backing attached to the peripheral edge of the inner lid, and the backing is attached to a maximum diameter of the inner lid. The wall thickness of the part that contacts the part is minimized, allowing the backing to be securely attached to the inner lid and improving the degree of sealing inside the pot.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a main body of the device, which is composed of a cylindrical outer shell 2, a protective frame 3, a heat insulating material 4 interposed between the two, and the like. Reference numeral 5 denotes a pot serving as a rice cooking container, which has an arbitrary gap from the opening of the protective frame 3 and is detachably provided. On the other hand, the outer lid 6 and the handle 7 are integrally formed, and a heat radiating plate 1o with a heat insulating heater 9 is attached to the lower surface via a lid insulating material, and a steam cylinder 11 is further attached to the heat radiating plate 10. It penetrates through the through hole part of 6. The outer cover 6 is pivotally supported on the main body 1 by a shaft 12,
It is secured to the main body 1 by a hook lever 13 on the other side. Reference numeral 14 denotes an inner lid made of an aluminum plate, with a silicone rubber backing 15 on the periphery for sealing the pot 5, a silicone rubber valve seat 16 for cooking rice at a constant pressure, and a removable weight type. It is equipped with a valve 17. Furthermore, the central portion of the inner lid is provided with a pin 18 made of silicone rubber, which is configured to be detachable from the bottle 19 screwed onto the heat sink plate 10.

Next, the outer edge portion of the inner lid 14 and the banking 15 will be explained based on FIG. 2. The backing 15 has a curled recess 20
The backing 1 holds the outer circumferential curling portion of the inner lid 14, and the backing 1 comes into contact with the maximum diameter portion of the curling portion of the inner lid 14.
The wall thickness t1 of the backing 15 is also smaller than the wall thickness t2 of the backing 15 that contacts the upper end B and lower end C of the curling portion.

It is configured to have a relational dimension of wall thickness t2 and tl minus t2.

Note that when considering cost and performance, t2
is preferably 1.5 to 3 times. Further, the backing 15 has an upper annular tongue portion 21 and a lower annular tongue portion 22 that extend vertically symmetrically with an incline.

The inner diameter of the backing at the maximum diameter portion A of the inner cover before installation is smaller than the outer diameter of the inner cover.

Effects of the Invention As is clear from the above configuration, according to the present invention, compressive stress in the center direction (d is greatest at the maximum diameter portion of the inner lid, and Since the wall thickness is smaller than that of the other parts, a phenomenon of stress concentration occurs, and the backing and inner lid are securely attached.

In this way, by utilizing the stress concentration phenomenon that is applicable to material mechanics due to simple dimensional relationships, it does not require special attention from the user.
Stable attachment can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a top cross-sectional view of a jar rice cooker showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the same essential parts, and a cross-sectional view corresponding to FIG. 2 of a third solid-layer conventional example. 5 Pot, 14- Inner lid, 15 Backing, 20.
Curled recess.

Claims (1)

[Claims] A cylindrical pot with a bottom, an inner lid that covers the top opening of the pot, and a backing attached to the peripheral edge of the inner lid, the backing being attached to a portion of the inner lid that abuts the largest diameter portion of the pot. A rice cooker with minimal wall thickness.