JPS5918624Y2 - microwave oven - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microwave oven in which the attachment of an exterior plate cavity front plate and a radio wave absorber is improved.

Conventionally, as shown in FIG. 1, an exterior plate 1 is bent toward the front side of the cavity, a cavity front plate 2 is fixed to the bent portion 1a by spora l-welding, and the outer edge 2a of the cavity front plate is attached to the door 3. At the same time, the radio wave absorber 4 was adhered to the outer edge 2a with an adhesive or double-sided adhesive tape, and then the radio wave absorber 4 was surrounded by a surrounding frame 5.

Since such a structure does not have sufficient strength, it must be reinforced with exterior plate fixing fittings 6 and screws 7, and a lot of work time is required to attach the radio wave absorber 4 to the outer edge 2a. Ta.

The present invention has been devised in view of this point, and one embodiment will be described below.

In FIG. 2, 8 is a microwave oven equipped with a cavity (not shown) for performing high-frequency heating inside, 9 is an exterior plate of the microwave oven, 10 is a door that is pivoted at one end and can be opened and closed; 11 is a viewing window for cooking, 12 is a control panel section, 13 is a cooking time display section for setting a timer, 14 is a knob for operating a timer (not shown) for setting the time for high-frequency heating, and 15 is a cooking knob. A start button 16 is a door release lever provided for opening the door, and 17 is a radio wave absorber surrounding frame made of an insulating material such as synthetic resin.

As shown in FIGS. 3 and 4, the exterior plate 9 is bent in a direction along the cavity front plate 18, and a portion 9b of the bent portion 9a thereof protrudes forward.

On the other hand, as particularly shown in FIG. 5, the cavity front plate 18 has diagonal line portions 18 a , 18 a , 18 a on its outer periphery cut out, and the dotted line indicator portion 18 b is bent forward to form an outer edge portion 18 C. A hole 19 and a tongue piece 18d are formed by bending the remaining edge 18d along the dotted line indicator 18e almost parallel to the outer edge 18C.

The protrusion 9b of the exterior plate 9 is inserted between the outer edge 18C of the cavity front plate 18 and the tongue piece 18d, and the exterior plate 9 is removed.
and the cavity front plate 18 are combined.

Furthermore, the exterior plate 9 and the cavity front plate 18 are securely fixed by spot welding.

Reference numeral 20 denotes a radio wave absorber having a substantially U-shaped cross section, and the radio wave absorber is fixed by engaging its recessed fitting portion 20a with the tip of the tongue piece 18d.

The radio wave absorber surrounding frame 17 is fixed using the outer edge 18C of the cavity front plate as a guide.

The radio wave absorber 20 is attached by bending the tip of the tongue piece 18d of the cavity front plate so as to approach the surrounding frame 17, and sandwiching the radio wave absorber 20 between the tongue piece 18d and the lower wall 17a of the surrounding frame. You may also do so.

In this case, since the tongue piece 18 d is urged upward by the elastic force of the radio wave absorber 20, the outer edge portion 18 C and the tongue piece 18
The tongue piece 9b inserted between the tongue piece 9b and the tongue piece 9b is clamped more firmly.

Since the present invention is constructed as described above, there is no need to provide exterior plate fixing fittings and screws for reinforcing the joint between the exterior plate and the cavity front plate as in the past, and the number of parts can be reduced. This eliminates the appearance of screws on the top, making it more desirable in terms of design, and also makes it extremely easy to attach the radio wave absorber.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a part of a conventional microwave oven, Fig. 2 is a diagram showing an embodiment of the present invention, Fig. 3 is a sectional view of the main part of the embodiment, and Fig. 4 is the embodiment. FIG. 5 is a perspective view showing the state of assembly of the main parts of the embodiment, and FIG. 5 is a diagram illustrating a method of forming the main parts of the same embodiment.

Claims (1)

[Scope of utility model registration request] In the case where the exterior plate and the cavity front plate are engaged, the cavity front plate is bent forward to form an outer edge, and the radio wave absorber and the radio wave absorber surrounding frame are fixed using the outer edge as a guide. A protrusion protruding forward is formed on the exterior plate, and a hole is provided on the cavity front plate for the protrusion of the exterior plate to pass through, and a tongue piece is located within the hole substantially parallel to the outer edge. A microwave oven characterized in that the protrusion inserted into the hole is held between the outer edge and the tongue, and the tip of the tongue serves as an attachment support for a radio wave absorber.