JPH0354325Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of industrial application> This invention relates to the heating chamber of a microwave oven that uses high frequency waves to perform cooking. This is to present things that contribute to cost reduction.

<Prior Art> FIG. 4 is an external perspective view showing the microwave oven with the door open. A door 2 for closing the heating chamber opening and a control panel 3 are attached to the front of the cabinet body 1.

The conventional cabinet body 1 includes a heating box assembly A, an electrical unit frame B attached to the right side of the heating box assembly A, and an electrical unit frame B attached to the left bottom of the heating box assembly A, as shown in FIG. It consisted of a bottom plate C and an exterior plate D.

As shown in FIG. 6, the heating box assembly A has a U-shaped bottom plate 4 constituting a cylindrical heating box body;
A top plate 5 and a front plate 6 having a food loading/unloading port 6a.
and a back plate 7 which also serves as the back plate of the heating box assembly A and the cabinet body 1, and each joint is fixed by spot welding or press caulking.

<Problems to be Solved by the Invention> Since the cabinet body having the above structure has a large number of parts and the joint surfaces are not aligned in the same direction, there is a large number of joining steps and there is a large room for improvement in assemblability.

<Means for solving the problem> The peripheral edge of the flat plate member is bent, and the flat plate member is bent into a U-shape so that the bent portion faces outward, and this bending allows the flat plates facing each other to A central member formed by bending the ends of the parts further outward into an L-shape, and a pair formed by bending a flat plate member into a U-shape and bending the periphery of this bent flat plate part inward. a side member, the front plate portion of the bent flat plate portion of the side member is on the same plane as the L-shaped bent surface of the central member, and the flat plate portion closes the side open surface of the central member. The back plate portion of the bent flat plate portion is used as the rear exterior plate.

<Function> Since the directions of the joint surfaces are the same, the joining process can be reduced, and by using the other side of the bent flat plate as the rear exterior plate, the rear plate of the cabinet body can be omitted.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of a heating box for a microwave oven according to the present invention, in which 11 is a central member formed by bending a flat plate member made of a conductive material such as a thin metal plate into a substantially U-shape; The back plate portion of this central member 11, 11b, 11b, is a pair of upper and lower flat plate portions, 11c, 11c is the flat plate portion 11b,
A pair of front plate parts 11d, 11d formed into a flat shape by extending the tip of 11b and bending it outward into a substantially L-shape.
Main flanges 11e, 1 are formed by further extending the front plate portions 11c and bending them rearward into an L shape.
1e is the above-mentioned back plate part 11a, flat plate parts 11b, 11b
and an auxiliary flange formed by extending the entire circumference of both ends of the front plate parts 11c, 11c and bending them outward into an L-shape.

12 is a flat plate member bent into a U-shape to form a flat plate part 12.
12b is a planar conductive side member (right) that extends the front side of the flat plate portion 12a and is bent outward into an L-shape. The front plate part 12c is a back plate part which extends the rear side of the flat plate part 12a and is bent outward into an L-shape, and is designed to be a rear exterior plate of the main body of the cabinet.
Exhaust louvers 12d, 12d are integrally provided. Reference numerals 12e and 12e are flanges formed by extending the entire circumference of the ends of the front plate part 12b and the back plate part 12c and bending them inward.

13 is a flat plate member 13 which is bent into a U-shape.
12b is a planar conductive side member (left) disposed to close the left open portion of the central member 11; The front plate part 13c is a back plate part which extends the rear side of the flat plate part 12a and is bent outward into an L-shape, and is a part that forms the rear exterior plate of the cabinet body. Reference numerals 13e and 13e are flanges formed by extending the entire circumference of the ends of the front plate part 13b and the back plate part 13c and bending them inward.

The heating box assembly A' is constructed as shown in Fig. 2 by fixing the above three members by projection welding as shown in Fig. 3a or press caulking as shown in Fig. 3b. However, the openings on both sides of the central member 11 are connected to the side members (right) 12 and the same (left) 13.
When closing the front plate part 11 of the central member 11
c, 11c and the front plate portions 12b, 13b of the side members are positioned on the same surface, and the auxiliary flanges 11e, 11e of the central member 11 and the flat plate portions 12a, 13a of the side members are overlapped. This is done by fixing the polymerization surface. 14 is an opening formed on one side of the heating box due to its configuration, and 15 is a bottom plate to which electric components such as a high voltage transformer and a high voltage capacitor are attached and fastened to the lower part of the side member (right) 12 with screws, etc. , and the bottom plate C shown in the prior art (not shown) constitute the base of the cabinet body. 16 is the same exterior plate as the exterior plate D shown in the prior art.

The back of the cabinet body 1 based on the present invention is connected to the back plate part 11a of the central member 11 and the back plate part 12 of the side members.
c, 13c, and cover members provided above and below the back plate portion 11a of the central member 11 as necessary, it is possible to eliminate the exterior back plate.

<Effects> The present invention reduces the number of parts and shortens the assembly process.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a heating box for a microwave oven showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the cabinet body according to the invention, Fig. 3 is a view showing an example of fixation of joints, FIG. 4 is an external perspective view of the microwave oven with the door open, FIG. 5 is an exploded perspective view of a heating box of a conventional microwave oven, and FIG. 6 is an exploded perspective view of the conventional cabinet body. Code, 11: Central member, 11a: Back plate portion, 11
b: Flat plate part, 11c: Front plate part, 12, 13: Side members, 12a, 13a: Flat plate part, 12b, 13
b: Front plate portion of the side member; 12c, 13c: Back plate portion of the side member.

Claims (1)

[Scope of utility model registration request] At the same time as bending the peripheral edge of the flat plate member, the flat plate member is bent into a U-shape so that the bent portion faces outward, and by this bending, the ends of the flat plate portion facing each other are further turned outward. A central member formed by bending into an L-shape, and a pair of side members formed by bending a flat plate member into a U-shape and bending the peripheral edge of the bent flat plate part inward, The side members are joined and fixed in a symmetrical manner so that the front plate portion of the bent flat plate portion is on the same plane as the L-shaped bent surface of the central member, and the flat plate portion closes the side open surface of the central member, A heating box for an electric range, characterized in that the back plate portion of the bent flat plate portion is used as a rear exterior plate.