JPS5855854Y2 - rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the improvement of a rice cooker, and in particular aims to minimize the influence of heat on the electrical components provided at the bottom of the main unit.

Below, an embodiment of the present invention will be described with reference to the drawings. 1 is a rice cooker, which is generally referred to as a heat-retaining rice cooker or an ordinary electric rice cooker, and has a curling part 2 that is open at the top and bottom and rolled inward around the circumference of the bottom. The body portion is formed by a substantially cylindrical outer case 3 which is integrally formed with the main body.

Reference numeral 4 denotes a bottom cover made of synthetic resin that is fitted around the circumference of the lower end of the outer case 3 to close the lower opening, with legs 5 integrally formed at appropriate corners and a cord reel storage box 6 attached to the back side. There is.

Reference numeral 7 denotes an outer pot with an open top, which is housed in the outer case 3 with a space therebetween.

Reference numeral 8 denotes an annular decorative frame made of heat-resistant plastic into which the upper end of the outer case 3 and the upper end of the outer hook 7 are fitted.

9 is an inner pot that is removably housed and suspended in the outer pot 7;
Its upper opening edge is engaged with the upper end of the outer hook 7, so that a gap 10 is formed around the entire circumference of the outer hook 7.

Reference numeral 11 denotes an inner lid that covers the upper opening of the inner pot 9 in a freely closable manner.

Reference numeral 12 denotes an outer lid having a bundle 13 on its upper surface, which is rotatably supported by a hinge 14 provided at the upper end of the outer wall of the outer case 3 via a hinge pin 15.

16 is a side heat insulator housed between the outer case 3 and the outer pot 7, and 17 is an upper heat insulator housed inside the outer lid 12.

18 is a heat sink made of aluminum, for example, and a lid heater 19
It is fixed with a mounting screw 22 to a mounting boss 21 integrally formed inside the outer cover 12 together with a heater holding plate 20 wrapped with the heater holding plate 20 .

Reference numeral 23 denotes a locking lever that is rotatably supported within the outer cover 12 at a position facing the hinge 14 via a shaft pin 24, and a knob 25 attached to the upper end is inserted through the knob hole 26 of the outer cover 12. An engaging pawl 27 is provided at the exposed lower end and projects toward the center of the outer case 3 .

Reference numeral 28 denotes a resilient coil spring wound around the shaft pin 24, which constantly biases the engaging pawl 27 of the locking lever 23 to rotate in the counterclockwise direction.

29 is opposite to the locking lever 23 and is connected to the hinge 1.
An engaging member made of heat-resistant plastic is fixed to the upper end of the outer case 3 with a screw 30 on the opposite side of the engaging claw 2.
An engaging portion 31 for locking 7 is integrally formed.

Reference numeral 32 denotes a switch device such as a microswitch that controls energization to a heating element, which will be described later.

33 is a side heater wrapped around the upper outer periphery of the outer pot 7;
Reference numeral 4 denotes a heating element for cooking rice, such as an annular sheathed heater, exposed in the gap 10.

Reference numeral 35 denotes a thermal reactor that can freely move in and out of the upper through hole 7' provided at the center of the bottom of the outer pot 7, and is always urged by a spring 36 so as to come into pressure contact with the bottom surface of the inner pot 9. An operating rod 38 having a heat receiving plate 35' and rotating around a central shaft 37
It is operated by an operation button 39 fixed to the tip of the button.

Reference numeral 40 denotes an auxiliary bottom plate fixed to the bottom surface of the outer hook 7 through a plurality of mounting members 41 such as insulators, the center of which bulges upward to form a bulged portion 44, and the outer periphery bent upward to form a flange. A bottom heat insulating material 42 is sandwiched between the auxiliary bottom plate 40 and the bottom surface of the outer pot 7.

An opening 46 is formed approximately at the center of the bulge 44 .

Between the auxiliary bottom plate 40 and the inner bottom surface of the bottom lid 4 are lead wires 47 for connecting electrical parts such as the switch device 32, the cord reel storage box 6, the rice cooking heating element 34, or the side heater 33, and an operating rod 38. An electrical component mounting space 48 is formed in which electrical components are housed and arranged.

The annular heating element 34 for rice cooking is held between a groove of a support member 49 such as an insulator and a -f-shaped support fitting 50, and a fixing screw 5 is used to fix the support fitting 50 and the support member 49.
1 penetrates up to the mounting member 41.

The flange 45 of the auxiliary bottom plate 40 engages with a step surface 52 formed on the side heat insulating material 16 to prevent the side heat insulating material 16 from rotating and falling.

A stepped guide portion 53 is attached below the bulge 44 of the auxiliary bottom plate 40, and a part of this guide portion 53 is connected to the opening 46 of the bulge 44.
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A guide piece 55 having a lower through hole 54 is formed on the upper surface of the guide portion 53 to slidably support the outer surface of the thermal reactor 35 .

Further, the bulging portion 44 of the auxiliary bottom plate 40 and the guide portion 53
A water reservoir portion 56 is formed between the guide portion 53 and the guide portion 53 to receive water droplets flowing down along the surface of the guide portion 53.

Reference numeral 57 denotes a cylindrical covering body that is engaged with the upper part of the thermal reactor 35 and has an open bottom surface and is spaced from the outer surface of the thermal reactor 35, and the interior of the covering body 57 and the guide portion 5 are open.
3. An operation in which the spring 36 is stretched between the upper surface and the lower end opening of the cover 57 is made larger in diameter than the lower through hole 54 of the guide part 53, and the cover is pressed downward during cooking. The button 39 is forcibly pushed upward, and the rear end of the operating rod 38 is simultaneously lowered about the central axis 37 at the same time as the thermal reactor 35, and the covering 5 is lowered on the way.
7 is kept in contact with the upper surface of the guide part 53, and finally the temperature-sensitive ferrite and magnet (not shown) are forcibly separated, the operation button 39 is returned to its original position, and the rice cooking switch (not shown) is activated. The rice cooker is designed to finish cooking halfway through the opening.

Note that 43 is a reinforcing metal fitting that presses against the curling portion 2 of the outer case 3.

Since the present invention is constructed as described above, the heat from the heating element is shielded by the heat insulating material at the bottom and the auxiliary bottom plate to prevent thermal deformation of the synthetic resin bottom cover, and the heat to the cord reel storage box is prevented. It also prevents impacts.

Furthermore, a mounting member such as an insulator is interposed within the heat insulating material of the floor, which prevents the heat insulating material from rotating and also serves as a base for fixing the heating element.

Furthermore, the auxiliary bottom plate forms a space for installing electrical components that can accommodate various electrical components by receiving the insulation material at the bottom, making assembly and maintenance inspection much easier than the conventional structure embedded in the insulation material. It has various effects such as.

[Brief explanation of the drawing]

The figure is a schematic sectional view of the rice cooker of the present invention. 7...Outer pot, 34...Heating element, 40.
...Auxiliary bottom plate, 41...Mounting member, 42
...Insulation material, 48... Space for installing electrical components.

Claims (1)

[Scope of utility model registration request] The outer bottom surface of the outer pot is surrounded by a heat insulating material, and an auxiliary bottom plate that covers the lower surface of the heat insulating material is placed on the outer pot with a mounting member such as an insulator interposed therebetween, and heat is generated using a fixing screw that passes through the mounting member. A rice cooker whose body is fixed to the bottom of the outer pot.