JPS62228818A - Operating portion of electronic range - Google Patents

Abstract

PURPOSE:To improve the internal capacity rate of the electronic range by providing projecting claws at portions of a sheet metal chassis, positioned at the ends of a keyboard, also providing recessed portions at an armored portion made of a resin which correspond to said claws, and fitting these projecting and recessed portions in each other. CONSTITUTION:An armored portion 7 of an operating portion is made of an ABS resin, and is provided on its right and left sides with three claws 10, respec tively, integrally formed. A main brain keyboard 11 constitutes an operating surface 5, and a terminal portion 12 is provided in a keyboard. On the right and left side surfaces of a sheet metal chassis 13, are provided cut and raised portions 16 opened to the outside. Further, two claws 18 are provided on sides where a front surface 17 to which is pasted the keyboard 11, and the left side surface are crossed. At portions of the armored portion 7 which correspond to the claws 18 of the armored portion 7 are provided holes 19 (recessed portions). The operating portion 7 can prevent the armored portion from being deformed by the fitting of claws and recessed portions, and hence can improve the internal capacity rate of the electronic range.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a technology for improving the internal volume ratio of a microwave oven.

Conventional technologyMicrowave ovens are increasing in popularity both domestically and internationally, and are reaching the point where they are considered essential items, and there is a growing demand for qualitative improvements, rather than the traditional product orientation that was simply cheap. . Just as refrigerators are required to have a large internal capacity and take up little space, in Japan, where kitchens are small, microwave ovens are also required to be space-saving. Improving the ratio of the internal volume of a microwave heating chamber to its volume has become a major technical challenge.

Technologies related to improving the internal volume ratio of microwave ovens include miniaturization of the radio wave seal mechanism on the door and technology related to improving cooling performance, but although these are also important, they have not received much attention in the past. One thing that was not addressed was the technology to miniaturize the operating section.

Figure 2 is an external view of the microwave oven seen almost from the front.Assuming that the size of the door 1 is the size of the heating chamber opening plus the size of the radio wave seal part, It can be seen how large a proportion of the size of 2 is in the internal volume ratio.

In other words, if we simply consider that the size of the door is proportional to the internal volume of the refrigerator, it is possible to maximize the internal volume ratio when there is no operating section.

Of course, since the operating section is essential, it cannot be removed, and considering the size of the human hand, there is a limit to how much the operating area can be reduced.

To some extent, the larger the size, the easier the operation. In FIG. 2, W is the width of this operating area, and L is the width of the entire operating section. As mentioned above, the larger W is to some extent the better in terms of operation, and therefore the minimum negative value is naturally determined. On the other hand, the smaller L is, the more desirable it is. In other words, W=L is the most desirable.

Problems to be Solved by the Invention However, in the past, it has been said that when approaching Lt-W, it becomes weak in strength and is easily deformed by human hands, as shown by the two-dot chain line at the left end of Figure 1. A problem occurred, and as a countermeasure, it was necessary to set l:W directly with a sufficient margin, which was a major hindrance to improving the internal volume ratio of the microwave oven.

The present invention solves these conventional problems,
The purpose is to improve the internal volume ratio of microwave ovens.

Means for Solving the Problems In order to solve the above problems, the operation section of the present invention is composed of a resin exterior section, a sheet metal chassis, and a membrane keyboard attached to the sheet metal chassis. A convex tab is provided at the end of the keyboard, a corresponding recess is provided in the resin exterior part, and the two are fitted together.

Function The microwave oven operation part of the present invention has the effect that the above-described engagement between the claw and the recess prevents deformation of the exterior part and dramatically improves the strength of the exterior part.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

Figure 2 is an external view of the microwave oven.
．． It consists of an outer box 3, etc. The door is provided with a handle 4, and the operation section is composed of an operation surface 6, a display surface 6, and an operation section exterior section 7 that forms the periphery thereof.

FIG. 1 is an exploded perspective view of the operating section. Exterior part 7 is ABS
It is made of resin, and has two large openings on the front: an operation surface opening 8 and an inclined display opening e. On the left and right sides, there are integrally molded claws with a right triangular cross section.
Provide three of each.

The membrane keyboard 11 has a multilayer structure with a total thickness of about 1.6 mm, and constitutes the operation surface 6 described above.

The keyboard has a terminal section 12. Sheet metal chassis 13
It has a box-shaped shape made of 0.8 mm galvanized steel plate, and has a display opening of 14 mm. It has an air vent hole 15 for a membrane keyboard, and the left and right side surfaces are provided with cut-outs 16 that open outward, and these cut-outs are provided at positions corresponding to the claws 1o of the exterior part. Also, the front surface 17...the surface to which the keyboard is attached, J--b surface layer J-
In addition to eggplant, 41 TIF connections are provided.

A fluorescent display tube 2o is fixed to the electronic circuit unit 19 in an inclined state.

Figure 3 is an enlarged view of part A in Figure 1.
It is formed by cutting and raising from 7, and is approximately 2.5 rI from the front surface 17.
The height of rIn. In this embodiment, two claws 18 are provided, both of which have the same height and are arranged on the same line.

What is shown by the two-dot chain line in FIG. 3 is the exterior portion 7, and holes 19 (recessed portions) are provided in the portions corresponding to the claws 18. The depth of the hole 19 is approximately 1.5 mm.

FIG. 4 is a cross-sectional view taken along the line BB' in FIG. 2, showing the assembled state as an operating section.

FIG. 6 is a diagram in which only the exterior portion 7 is taken out from FIG. '84, and serves to show the cross section of the hole 19.

Effects of the Invention As described above, according to the operating part for a microwave oven of the present invention, deformation of the resin exterior part can be prevented. Furthermore, it is of great help in improving the internal volume ratio of microwave ovens, which has been difficult in the past.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the operating section of a microwave oven that is an embodiment of the present invention, Fig. 2 is an external perspective view of the same, Fig. 3 is an enlarged view of section A in Fig. 1, and Fig. 4 is Corresponding to the BB cross section in the figure,
FIG. 5 is a partial sectional view of FIG. 4 when the operating section is assembled. 5... Operation section, 7... Exterior section, 11.
...keyboard, 18...nail, 19.
·····hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 4 Figure 5

Claims (1)

[Claims] The device includes a resin exterior, a sheet metal box-type chassis, a membrane keyboard, and an electronic circuit unit, the electronic circuit unit being fixed to the inside of the sheet metal chassis, and the keyboard being adhesively fixed to the outside of the chassis. , and is configured to be sandwiched between the chassis and the exterior part, a large opening is provided in the exterior part of the part facing the keyboard, and the chassis has a convex shape at a position corresponding to the periphery of the keyboard. An operating unit for a microwave oven, characterized in that a tab is provided, a recess is provided in the exterior portion facing the tab, and the two are fitted together.