JP2513113Y2 - microwave - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of Invention] (Field of Industrial Application) The present invention relates to a microwave oven in which microwaves generated by a magnetron are introduced into a heating chamber through a waveguide.

(Prior Art) In recent microwave ovens, in order to reduce the external height, a waveguide is attached to the side plate of the inner box that constitutes the heating chamber,
There is a configuration in which a magnetron is attached to this waveguide.

(Problems to be solved by the invention) In the above conventional configuration, since the waveguide with the magnetron is cantilevered on the side plate of the inner box, the weights of the magnetron and the waveguide are concentrated on the side plate of the inner box. Join. For this reason,
It was tried to reinforce by forming a bead for reinforcement on the side plate of the inner box or increasing the plate thickness of the side plate, but it was not perfect, but the side plate was distorted and deformed, and the heating chamber Not only the aesthetics of the surface are impaired, but also the deformed surface disturbs the reflection of microwaves, which may cause uneven heating.

Further, a high voltage transformer for applying a high voltage to the magnetron is provided between the outer box and the inner box. There is also a drawback that the side plates vibrate slightly and generate unpleasant noise.

The present invention was made in consideration of such circumstances,
Therefore, the purpose is to prevent distortion and deformation of the side plates of the inner box due to the weight of the magnetron, etc., to improve the appearance of the inside of the heating chamber and stabilize the microwave reflection, and to prevent noise due to the magnetic field of the high-voltage transformer. There is a microwave oven available.

[Structure of the Invention] (Means for Solving the Problems) A microwave oven of the present invention is a waveguide in which an inner box forming a heating chamber is arranged in an outer box, and the outer plate of the inner box is fixed to the outer surface. In which a magnetron is attached to the waveguide, the waveguide is provided so as to extend toward the side plate of the outer box, and the extension part fixed to the side plate of the outer box by a screw or the like is provided on the side plate of the outer box. A recess provided to accommodate the screw or the like so that the screw or the like does not protrude from the side plate of the outer box, a name plate attached to the side plate of the outer box so as to cover the recess or the screw, and the guide. A high-voltage transformer is provided below the wave tube in the vicinity of the waveguide and supplies a high voltage to the magnetron.

(Operation) Since the extending portion provided in the waveguide is fixed to the side plate of the outer box, the waveguide has a form in which both ends are supported by the side plate of the outer box and the side plate of the inner box. Therefore, the weights of the magnetron and the waveguide are distributed and received by the outer box and the inner box, and the strain deformation of the side plate is prevented. Further, since the side plate of the outer box and the side plate of the inner box are connected by the waveguide, the vibration of the side plate is suppressed by the waveguide.

In addition, a recess is provided in the side plate of the outer box, and a screw or the like is housed in the recess so that the screw or the like does not protrude from the side plate of the outer box. Further, the side plate of the outer box covers the recess and the screw. Since the nameplate is attached to the, the screws and the like are hidden by the recess and the nameplate, and the appearance can be improved.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1
Is an outer box of a microwave oven, and an inner box 3 constituting the heating chamber 2 is disposed inside the outer box. A machine room 4 is formed between the right side plate 3 a of the inner box 3 and the right side plate 1 a of the outer box 1, and a high voltage transformer 5 is arranged at the bottom of the machine room 4. Reference numeral 6 denotes a rectangular tube-shaped waveguide horizontally arranged in the machine room 4. This waveguide 6 has a structure in which the lower surface opening of the tube main body portion 6a is closed by a lower surface plate 6b. A mounting flange portion 7 is formed on the edge portion. Correspondingly, an opening 8 for introducing microwaves is formed substantially at the center of the right side plate 3a of the inner box 3, and the left end opening of the waveguide 6 is aligned with this opening 8. The mounting flange portion 7 is fastened and fixed to the right side plate 3a of the inner box 3 with a screw 9. In addition, the opening 8 has a cover
10 is fastened together with screw 9. On the other hand, a magnetron 11 is attached to the right end of the upper surface of the waveguide 6, and the microwave generated by the magnetron 11 is introduced into the heating chamber 2 through the opening 6 from the opening 8.

An extension 12 extending toward the right side plate 1a of the outer box 1 is integrally provided at the right end of the lower surface plate 6b of the waveguide 6, and the tip of the extension 12 is provided at the distal end thereof. The screwing piece portion 12a is bent downward at a right angle. Corresponding to this, the right side plate 1a of the outer box 1 is provided with, for example, two recesses 13 for screwing by press molding or the like, and the screwing piece 12a of the extending portion 12 is formed on the inner surface of each recess 13. Are abutted on each other, and both are fastened and fixed by a screw 14. As a result, the waveguide 6 has a form in which both ends are supported by the right side plate 1a of the outer box 1 and the right side plate 3a of the inner box 3. A name plate 15 is attached to the outer surface of the right side plate 1a of the outer box 1 so as to cover the concave portion 13. On the nameplate 15, the model name, serial number, rated voltage, etc. are described.

In FIG. 2, 16 is a door that opens and closes the front surface of the heating chamber 2, 17 is an operation panel provided on the front surface of the machine room 4, and 18 is a spine that collectively covers the back surfaces of the outer box 1 and the inner box 3. A plate, 19 is a fan unit attached to the back plate 18 in the machine room 4, and the fan unit 19 cools the magnetron 11.

According to the above configuration, since the side plate 12 extending to the waveguide 6 is fastened and fixed to the right side plate 1a of the outer box 1 with the screw 14, the waveguide 6 and the right side plate 1a of the outer box 1 are internally fixed. Both ends are supported by the right side plate 3a of the box 3. Therefore, the weights of the waveguide 6 and the magnetron 11 can be distributed to the right side plate 1a of the outer case 1 and the right side plate 3a of the inner case 3, and strain deformation of the right side plates 1a and 3a can be prevented. Therefore, the appearance of the inner surface of the heating chamber 2 is not impaired, the microwave reflection is stabilized, and uneven heating can be prevented.

Moreover, since the right side plate 1a of the outer box 1 and the side plate 3a of the inner box 3 are connected by the waveguide 6, the right side plates 1a, 3
Even if the high voltage transformer 5 is located between a and the influence of the magnetic fluctuation affects the right side plates 1a and 3a,
The vibrations of a and 3a can be effectively suppressed by the waveguide 6, and the generation of noise due to the vibration can be prevented.

Further, in the above-described embodiment, since the extending portion 12 is integrally extended to the waveguide 6, the number of parts does not increase except for the screw 14, and compared with the case where a separate reinforcing member is provided, Manufacturing cost can be reduced.

Furthermore, since the screw 14 (recess 13) is covered with the nameplate 15, the outer box 1 is not damaged in appearance.

Although the extension 12 is screwed to the right side plate 1a of the outer box 1 in the above embodiment, it may be caulked or welded with a rivet or the like. The stopper piece 12a may be bent upward, and further, the magnetron 11 may be attached to the lower surface of the waveguide 6 in a hanging shape.

In addition, the present invention does not necessarily need to be provided with the name plate 15 and the recessed portion 13, and the shape of the extending portion 12 may be appropriately changed, and various modifications are possible.

[Effects of the Invention] As is apparent from the above description, the present invention has the extension portion provided on the waveguide fixed to the side plate of the outer box. Both sides are supported by the side plates, which prevents strain and deformation of the side plates of the inner box, improves the appearance of the heating chamber interior and stabilizes the microwave reflection, and the magnetic field of the high voltage transformer Noise can be prevented, and a recess is provided in the side plate of the outer box, and a screw or the like for fixing the extending portion of the waveguide is housed in the recess so that the screw or the like does not project from the side plate of the outer box. Furthermore, since the nameplate is attached to the side plate of the outer box so as to cover the recesses and screws, the recesses and nameplates hide the screws and the like.
The appearance can be improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional front view of a main portion, and FIG. 2 is a transverse plan view of the same. In the drawings, 1 is an outer box, 1a is a right side plate, 2 is a heating chamber, 3 is an inner box, 3a is a right side plate, 4 is a machine room, 5 is a high voltage transformer, 6 is a waveguide, 6b is a lower plate, 11 Is a magnetron, 12 is an extension,
12a is a screwing piece, 13 is a recess, and 14 is a screw.

Claims (1)

(57) [Scope of utility model registration request] 1. An inner box constituting a heating chamber is arranged in the outer box,
A magnetron is attached to a waveguide fixed to the outer surface of the side plate of the inner box, wherein the waveguide is provided so as to extend toward the side plate of the outer box and fixed to the side plate of the outer box by screws or the like. Extended portion, a recessed portion for accommodating the screw or the like provided on the side plate of the outer box so that the screw or the like does not protrude from the side plate of the outer box, the recessed portion and the screw or the like on the side plate of the outer box. A microwave oven, comprising: a nameplate attached so as to cover the waveguide; and a high-voltage transformer provided below the waveguide in the vicinity of the waveguide and supplying a high-voltage to the magnetron.