JPS6010501Y2 - Temperature sensing device mounting structure in electric rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the mounting structure of a temperature sensing device in an electric rice cooker.

In a conventional electric rice cooker, a temperature sensing device for sensing the temperature of the rice cooker upon completion of rice cooking is fixed to a heat sink in which a rice cooking heater is embedded.

However, in this case, due to heat conduction from the heat sink, the temperature sensing device is activated before the temperature of the rice cooker rises sufficiently.
There is a problem in that it causes poor cooking.

In view of the above-mentioned problems, the present invention has been developed by attaching a temperature sensing device to the inner case that constitutes the inner surface of the main body case via an annular member made of a metal material with relatively poor thermal conductivity such as stainless steel. The object of the present invention is to provide a temperature-sensing device mounting structure that minimizes the influence of heat from a heat sink on the temperature-sensing device, and thus can operate in response to changes in the temperature of the rice cooker. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a structure for mounting a temperature sensing device in an electric rice cooker according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a main body case, 2 a lid body that covers the upper opening of the main body case 1 so that it can be opened and closed, 3 an aluminum inner case that constitutes the inner surface of the main body case 1, 4 and 5.
Reference numerals denote an outer case and a bottom member constituting the outer surface of the main case 1, 6 a heat sink disposed on the inner bottom of the inner case 3, 7 a rice cooking heater embedded in the heat sink 6, and 8 the heat sink. 6
A rice bowl 9 is housed in the main body case 1 while being in contact with a heat insulating material filled between the inner and outer cases 3 and 4.

This electric rice cooker is configured so that after rice is cooked by the rice cooking heater 7, it can be kept warm by a heat retention heater (not shown).

At the center of the bottom of the inner case 3, a cylindrical protrusion 3a is formed, and in the center of the protrusion 3a there is an appropriately sized section into which a temperature-sensing device 10 (to be described later) is inserted. Sa-no-hole 1
1 is formed.

The temperature sensing device 10 has a bottomed cylindrical mounting case 10a.
and a main body 10b elastically supported within the mounting case 10a by a spring 12 having an upward biasing force.

The upper surface of the main body 10b is pressed against the bottom surface of the rice bowl 8.

Inside the main body 10b, a temperature-sensitive magnetic material 14 fixed to the top plate 13 and a magnet 16 fixed to a receiver 15 disposed so as to face the temperature-sensitive magnetic material 14 are disposed. There is.

The holder 15 is held by a spring 17 so that the temperature-sensitive magnetic body 14
is biased in the direction away from the

The receiver 15 includes a main body 10b and a mounting case 10.
An operating rod 18 is provided which extends downwardly through the a.

A switch lever 19 is connected to the lower end of the operating rod 18.

This temperature sensing device 10 operates as follows.

When the handle 20 of the switch lever 19 is pushed down, the operating rod 1
8 rises, and the magnet 16 is attracted to the temperature-sensitive magnetic body 14 against the biasing force of the spring 17.

At this time, the rice cooking switch 21 is turned on.

This temperature-sensitive magnetic material 14 loses its magnetism when the temperature rises to a predetermined temperature (rice-cooking completion temperature), so when the temperature of the rice cooker 8 rises to the rice-cooking completion temperature, the magnet 16 is pushed down by the biasing force of the spring 17 and becomes operational. The rod 18 also descends.

Therefore, the end of the switch lever 19 is lowered and the rice cooking switch 21 is turned off.

Further, a flange portion 22 is integrally provided at the upper end of the mounting case 10a and projects outward.

Further, on the side circumference of the mounting case 10b, an appropriate number of cut and raised pieces 23.23. ... is formed.

An annular member 24 made of a metal material with relatively poor thermal conductivity, such as stainless steel, is interposed between the flange 22 and the mouth edge 11a of the hole 11 on the inner case 3 side.

Therefore, the temperature sensing device 10 includes the flange 22 and the cut and raised pieces 23.2.
3... Between the hole edge 11a and the annular member 24
It is fixed by clamping it.

The annular member 24 consists of a cylindrical portion 24a and a flange portion 24b that projects inward from the upper end of the cylindrical portion 24a. An annular stepped portion 25 into which the portion 22 fits is formed.

The height of the cylindrical portion 24a is appropriately determined depending on the distance between the bottom surface of the rice bowl 8 and the top surface of the inner case raised portion 3a.

In this way, the temperature sensing device 10 is thermally isolated from the heat sink 6.

Next, the effects of the temperature sensing device mounting structure in the electric rice cooker of the present invention are listed below.

That is, according to the present invention, (1) the mounting flange 22 of the temperature sensing device 10 disposed in the hole 11 at the center of the bottom of the inner case 3 and the mouth edge 11a of the hole 11;
An annular member 24 made of a metal material with relatively poor thermal conductivity, such as stainless steel, is interposed between the thermosensing device 10 and the heat dissipation plate 6, and heat conduction from the inner case 3 is minimized. Since the temperature sensing device 10 operates in response to changes in the temperature of the rice cooker, accurate operation can be ensured.

(2) Since the annular member 24 is configured separately from the inner case 3, it can be designed appropriately depending on the distance between the bottom surface of the rice bowl 8 and the inner case 3, and can be integrated into the inner case 3. It is easier to process than those that are formed manually.

It has such practical effects.

[Brief explanation of drawings]

Fig. 1 is a side view of the lower part of the electric rice cooker according to the embodiment of the present invention, Fig. 2 is an enlarged view of part A in Fig. 1, and Fig. 3 is a main part of the electric rice cooker of Fig. 1. It is an exploded perspective view. 1...Main case, 3...Inner case,
8... Rice bowl, 10... Temperature sensing device, 11
...hole, lla...rim of mouth, 22...
...Brim portion, 24...Annular member.

Claims (1)

[Scope of utility model registration request] A hole 11 of an appropriate size is formed in the center of the bottom of the inner case 3 that constitutes the inner surface of the main case 1 in which the rice bowl 8 is to be stored, and a hole 11 of an appropriate size is provided in the hole 11 so as to be in contact with the bottom surface of the rice bowl 8. A metal material with relatively poor thermal conductivity such as stainless steel is disposed between the mounting collar 22 of the temperature sensing device 10 and the mouth edge 11a of the hole 11. A structure for mounting a temperature sensing device in an electric rice cooker, characterized in that an annular member 24 consisting of the following is interposed.