JPS6321489B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an electric rice cooker equipped with a prismatic cylindrical frame, and particularly aims at reinforcing the frame and preventing displacement of the frame cover.

If the frame was cylindrical as in the past, there would be no problem, but if the frame is formed into a rectangular tube shape, it will be strong against external pressure at the corners, but will easily dent on flat surfaces. There were flaws.

The present invention aims to eliminate such drawbacks, and embodiments thereof will be described below.

1 is a pot body consisting of a frame, an outer pot, an inner pot, etc. which will be described later; 2 is a rectangular type made by bending an oblong steel plate into a frame shape with screw holes 3, 3 provided in the upper part of a flat wall, and fitting the end faces with a dovetail. A cylindrical frame 4 is a square outer pot with a bottom provided in the frame, and the corners 4a and 4 are rounded.
b, 4c, and 4d are approximately the same as the corners 2a, 2b, 2c, and 2d of the frame 2.
That is, the frame-shaped space S between the frame 2 and the outer pot 4 is set uniformly over substantially the entire circumference thereof. Reference numeral 5 denotes a square inner pot with a bottom, which is detachably inserted into the outer pot 4 and is suspended by placing its opening periphery 6 on the opening periphery 4e of the outer pot 4 when inserted; The radiuses 5a, 5b, 5c, and 5d of the corner portions are slightly sharper than the radiuses 4a of the outer pot 4.

Therefore, when inserting the inner pot 5, a frame-shaped space X is formed between the outer bottom wall and the inner bottom wall of the outer pot 4, and a frame-shaped space X is formed between the outer bottom wall and the inner wall of the outer pot 4 along the entire circumference. A frame-shaped gap W is formed that communicates with each other. This gap W is between the radius 4a of the outer pot 4 and the inner pot 5 as shown in Figure 6.
Since the radius 5a... of each corner is different, the gaps Wa, Wb, Wc, Wd at the respective corners are the gaps W1, W2, W between the planes between the outer wall of the inner pot 5 and the inner wall of the outer pot 4.
3. It is slightly larger than W4.

The relationship between the gaps Wa and W1 is determined by the calorific value and outer diameter of the electric heater, the outer diameter of the inner pot 5, and the inner diameter of the outer pot 4, which will be described later. Reference numeral 7 denotes an annular electric sweater fixed to the inner bottom wall of the outer pot 4 in an exposed state and disposed within the space It is led out to the bottom of the pot 4. This prevents the rice in the corner corresponding to that corner of the inner pot 5 from being cooked more raw than other parts if the terminals 8, 8 are led out from one corner. It's for a reason. Reference numeral 9 denotes a support fitting fixed to the lower part of the outer bottom wall of the outer pot 4;
Reference numeral 0 denotes a heat sensitive element provided between the outer bottom wall of the outer pot 4 and the support metal fitting 9, and is always biased by a spring (not shown) so as to project upward; 11 is the support metal fitting 9;
A switch assembly is fixed to the heat sensitive body 10, with a part supported pivotally, an operating knob 12 fixed to one end, and the other end fixed to the heat sensitive element 10.
a switch lever 14 engaged with an operating shaft 13;
The rice cooking switch 15 is closed when the other end of the switch lever is raised and opened when the other end of the switch lever is lowered.

Reference numeral 16 designates a switch cover fixed to a part of the plane wall of the frame 2, and the operation knob 12 is made to face the lower opening 17 of the switch cover. Reference numeral 18 denotes a heat insulating material stored in a rectangular frame-shaped space S formed between the frame 2 and the outer pot 4. As shown in FIG. By pressing and inserting the inner corners 18a, 18b, 1
8c, 18d are corners 4a, 4 of the outer pot 4
b, 4c, and 4d to prevent them from falling off. This is because the wall thickness of the corner portions 18a, 18b, 18c, 18d of the heat insulating material 18 is increased by the pressure insertion of the heat insulating material 18, and the thickness of the corner portions 2a, 2b, 2c of the frame 2 is
2d, and the degree of adhesion increases. Reference numeral 19 denotes a reinforcing plate for the frame 2, which is made by bending a belt-shaped metal plate made of a steel plate or the like, which is thicker than the frame 2, and abutting the end surfaces of the plates, and the entire frame is constantly exposed due to its own elasticity. Mounting pieces 21, 21, 21 are configured to expand in the direction, and have mounting pieces 21, 21, 21 having screw holes 20, 20, 20 extending upward in a pair on one opposing side. This reinforcing plate 19
After molding the frame 2, reduce the diameter and insert it from above or below against the frame's own elasticity, and insert the screw holes 20, 20, 20 of the mounting pieces 21, 21, 21 with screws 22, 22, 22. The reinforcing plate 19 is screwed into the screw holes 3, 3 of the frame 2 through the reinforcing plate 19, and is fixed to the inner wall surface of the frame 2 by its own elasticity. Along with fixing the above-mentioned mounting pieces 21, 21, 21, a frame cover and a hinge, which will be described later, are fixed at the same time.
Reference numeral 23 denotes a frame-shaped frame cover that fixes the opening periphery of the frame 2 and the opening periphery 4e of the outer pot 4, and includes a fixing piece 24 extending downward on one of the opposing plane parts and extending upward over the entire periphery. The groove part 25 and the hook receiving part 26 are integrally molded, and a pair of fixing pieces 27, 27 extending downward and a pair of left and right hinges 28, 28 extending upward are molded on the other flat part. The frame 2, the reinforcing plate 19, and the frame cover 23 are fixed simultaneously using the screws 22, 22, and 22. 29 is a back plate fixed below the frame 2, and 30 is a cord reel assembly fixed to the lower part of the back plate 29. 31 connects one side to the pot body 1
A square top plate 33 made of synthetic resin has a rectangular recess 32 formed approximately in the center thereof, and a rectangular top plate 33 that is fixed to the top plate and has a recess. 32, and a flat lower plate 35 made of synthetic resin provided on the lower surface of the upper plate 33.
It consists of a flat heat dissipation plate 36 made of a material with good thermal conductivity and fixed to the lower surface of the lower plate. Reference numeral 37 includes the heat sink plate 36. 37 is a heat-retaining heater fixed closely to the upper surface of the heat sink 36; 38;
is a packing fixed by the lower plate 35 and the heat radiating plate 36, and comes into elastic contact with the upper surface of the opening periphery 6 of the inner pot 5 when the inner pot 5 is closed. 39 is the upper plate 33 and the lower plate 35
The lever is supported by a hook lever 41, a part of which is pivotally supported by a hook assembly provided in a space between the two, a push button 40 is fixed at one end, and the other end is always biased inward by a spring (not shown). The shaft fitting 42 is fixed to one piece of the upper plate 33 with screws 43. Reference numeral 44 denotes a reinforcing metal fitting overlaid on the lower surface of one piece of the upper plate 33. One side is fixed to one piece of the upper plate 33 at the same time as the shaft metal fitting 42, and the other side is fixed to one piece of the upper plate 33 with screws 45.
One piece of the upper plate 33 and one piece of the handle 34 are fixed simultaneously. Reference numeral 46 indicates a mounting shaft vertically disposed downward in the center of the heat sink 36, and reference numeral 47 indicates a through hole 48 in the center.
This is a rectangular inner lid with good heat conduction, in which an elastic pressing body 49 having a shape is fitted and fixed. Accordingly, the lid body 31 has one side of the opposing plane part pivoted to the hollow shafts 50, 50 of the hinges 28, 28 for biaxial support, and the other side can be freely latched to the hook receiving part by the hook lever 41. There is. 51, 51 is a hinge 2 led out from inside the pot body 1
Heater 3 for keeping the lid 31 warm via 8 and 28
With two lead wires connected to
It is inserted through 0. Reference numeral 52 denotes a side heat-retaining heater closely fixed to the relatively upper outer wall of the outer pot 4.

As described above, the present invention provides a reinforcing plate on the upper inner circumferential wall of a rectangular cylindrical frame, so that the strength of all pairs of frames from external pressure is improved and the situation of denting is eliminated, and the frame cover is Since the lower end surface is locked to the mounting piece of the reinforcing plate, the frame cover is prevented from shifting, and the frame cover is firmly attached.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of the electric rice cooker of the present invention, Fig. 2 is a partially exploded perspective view of the pot body, Fig. 3 is an external perspective view of the lid body, and Fig. 4 is a partial cross section of the lid body and the pot body. 5 is a sectional view of the pot body, and FIG. 6 is a plan view of the pot body. 2... Frame, 4... Outer pot, 23... Frame cover, 19... Reinforcement plate.

Claims (1)

[Claims] 1. A prismatic cylindrical frame with an open top surface, a bottomed outer pot housed within the frame with a gap between them, an inner pot that is removably inserted into the outer pot, and the above-mentioned It consists of a frame and a frame cover that connects the upper opening edge of the outer pot, a belt-shaped frame-shaped reinforcing plate is arranged on the upper inner peripheral wall of the frame, and a mounting piece having a step is provided on the upper part of the reinforcing plate. integrally formed, and locking a lower end surface of the frame cover to the mounting piece;
An electric rice cooker characterized in that the frame, the frame cover, and the reinforcing plate are integrally fixed with screws.