JPS60129009A - Rectangular 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 Industrial Application The present invention relates to a rectangular rice cooker for use in general households.

Conventional configurations and their problems In recent years, there has been a remarkable development of rectangular type kitchen products from the viewpoint of effective use of kitchen space and a good external design for the kitchen system kitchen.

Hereinafter, the conventional rice cooker as described above will be explained with reference to the drawings.

FIG. 1 shows the structure of the main body of a conventional square rice cooker.

In FIG. 1, reference numeral 1 denotes a rectangular cylindrical body, and numeral 2 denotes a fitting stepped portion similar in shape to the rectangular cylindrical body 1 and slightly smaller in shape, which is provided at the end of the body.

3 is an annular upper frame made of synthetic resin that fits into the end of the body 1, and 4 is a guide groove for inserting the fitting step 2 at the end of the body 1, which is provided around the entire circumference. There is.

Reference numeral 6 denotes a protective frame for the internal structural parts of the main body, and 6 a lower frame constituting the lower surface of the main body, which is attached by a fitting step 2' and a guide groove 4' in the same manner as in the combined structure of the body 1 and the annular upper frame 3.

Reference numeral 7 denotes a fixing fitting that connects the lower frame 6 and the protection frame 5.

The structure of the rectangular rice cooker configured as above will be explained below.

First, the fitting steps 2 and 2' at the ends of the body 1 are simply inserted into the guide grooves 4 and 4' of the annular upper frame 3 and the lower frame 6, respectively. The upper flange is fixed, and the protective frame 5 is fixed to the lower frame 6 by fitting into a fixing fitting 7 on the lower surface side.

Therefore, the body 1 has the upper frame 3. Protective frame 5. The lower frame 3 and other fixed parts are attached to each other via fixing fittings 7.

However, in the above configuration, the body 1 is completely fixed, and almost all the loads such as the dead weight of the rectangular cylindrical body 1, the parts fixed thereto, and the lower frame 3 are transferred to the fixing bracket 7.
It is an important component that requires sufficient consideration in terms of strength in order to withstand drops and other impacts during handling. Also, the end of the body 1 has an annular upper frame 3. Since they are only inserted into the respective guide grooves 4 and 4' of the lower frame 6, there is a drawback that looseness or local deformation may occur due to variations in the vertical direction or the distance across the square.

Further, as described above, since the body 1 is held together by a plurality of fixed parts, each part is indispensable, resulting in a large number of parts and a large number of man-hours.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a square rice cooker with an outer shell that disperses shock loads during handling such as dropping, weight of parts, etc. to each part, reduces the number of component parts, and simplifies assembly work. It provides:

Structure of the Invention The prismatic rice cooker of the present invention has a prismatic cylindrical body having an inward curling portion at the end, and a prismatic member that fits into the prismatic cylindrical body, and at least one of the sides of the prismatic member By having an outer shell with fitting undercut parts larger than the shape of the curling part at two or more places, sufficient strength can be ensured with only the rectangular joint-like body, and reinforcing members can be simplified or eliminated. This also improves assembly work efficiency.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a -° perspective view of a square rice cooker which is an embodiment of the present invention. In FIG. 2, reference numeral 10 denotes a rectangular cylindrical body which is the outer frame portion of the main body with a double structure, 11 an annular upper frame that fits into the upper end of the rectangular cylindrical body 1o, and 12 the lower end of the rectangular cylindrical body 1o. 13 is a bottomed cylindrical pot to be stored in this main body;
Reference numeral 4 denotes an outer lid that covers the upper opening of the rectangular cylindrical body 1Q and the pot 13, one of which is rotatably supported by the annular upper frame 11, and the other is latched by a lever 16 of a set of seams to close the outer lid. It opens and closes.

FIG. 3 is a partially sectional side view of the same embodiment.

In FIG. 3, a protective frame 16 is fixed to the annular upper frame 11 with screws or the like.

Next, in FIGS. 4 to 6, reference numeral 17 indicates a fitting undercut portion provided on the annular upper frame 11, and its inner diameter dimension d is the inner shape dimension C of the end inward curling portion 10a of the square cylindrical body 1○. They are larger and are provided at two opposing sides of the body 10.

FIG. 7 shows a deformed state when the rectangular cylindrical body 10 and the annular upper frame 11 are fitted together. In Figure 7,
When the diagonal dimension of the square cylindrical body 1Q is deformed inward by E, the sides of the square cylindrical body 1° are deformed outward by F. 11
is 2E in diagonal dimension in the mated state position.
I try to leave some slack.

To explain the operating state when the above configuration is fitted, the square cylindrical body 1o and the annular upper frame 11 have a diagonal dimension difference of 2E as described above.
The corner of o is deformed inward by an amount of E, so that the side part expands outward by an amount of F, and the annular upper frame 1 located at this portion
The fitting undercut portion 17 of the body 1o is pushed over the curling portion 10a of the body 1o to the fitting position. This is because when the body 10 is deformed inward by E at the corner, the amount of change F on the side is quite large, approximately 10 times as large, so that the square cylindrical body 1° and the annular upper frame 11
Even if the diagonal dimension difference 2E between the two is not so large, the fitting undercut 17 provided on the annular upper frame 11 can be relatively large and provided in a wide range of sides, and it is possible to assemble and fit them. It can be done smoothly even when meeting.

Furthermore, since the fitting undercut 17 can be made relatively large over a wide area on the sides, the weight of the parts and external forces applied after fitting are mainly applied in the direction of the cylindrical core, and the fitting undercut 17 must have sufficient strength to hold against these forces. Become.

The above-mentioned fitting is similarly performed between the square cylindrical body 1o and the lower frame 12. Therefore, when assembled with such a main body configuration, the lower frame 1a is held by the rectangular cylindrical body 10, and these are held by the upper frame, and the protective frame 16 that constitutes the inside of the main body is also held by the upper frame. This makes it possible to reduce the number of parts by eliminating the need for fixing fittings that connect the lower frame and protection frame, as was the case in the conventional example, and also improves assembly efficiency as parts can be held by the strength of each fitting. This has the effect of improving the performance and preventing the occurrence of vertical wobble due to overlapping component variations.

Effects of the Invention As is clear from the description of the above embodiments, the rectangular rice cooker #outside of the present invention has an inwardly curled end portion of the rectangular cylindrical body, and a rectangular member that fits into the rectangular cylindrical body. By providing fitting undercuts larger than the inner shape of the inward curling at at least two places on the sides of the rectangular member, parts can be easily held and fixed simply by fitting. This makes it possible to reduce the number of points and improve ease of assembly.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a conventional square rice cooker, FIG. 2 is a perspective view of a square rice cooker according to an embodiment of the present invention, and FIG. 3 is a partially sectional side view of the same square rice cooker. Figure 4 is a plan view of the body of the isogonal rice cooker, Figure 5 is a sectional view taken along line A-A in Figure 4, and Figure 6 is
The figure is a sectional view taken along the line BB in FIG. 4, and FIG. 7 is a plan view showing a modification of the outer shell of a rectangular rice cooker according to an embodiment of the present invention. 1O... Square cylindrical body, 10a...
Curling part, 11... Annular upper frame, 17...
...Mating undercut part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 f4 Figure 4 Figure 7

Claims (1)

[Claims] a square cylindrical body with an inward curling part at the end;
A prismatic rice cooker comprising a prismatic member that fits into the prismatic cylindrical body, the angular rice cooker having an outer shell provided with fitting undercut portions larger than the shape of the curling portion at at least two places on the sides of the prismatic member.