JP2002130688A - Heating cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable curving of the cover of a microwave oven according to the curvature of the outer peripheral edges of a front plate and a rear plate. SOLUTION: A claw part 23 is formed as an upper lock body 20 of the front edge of the cover 1 and a notch part 24 is formed between the adjoining claw parts 23. A recess part 28 is formed in an upper bent body 26 of the rear edge of the cover 1 and the cover 1 is curved to the curvatures of the front plate 4 and the rear plate 5, the outer peripheral edges of which are curved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a cabinet for a high frequency heating cooker such as a microwave oven.

[0002]

2. Description of the Related Art As a conventional microwave oven, as shown in FIG. 11, a heating chamber 40, a front plate 41 around the opening of the heating chamber 40, a rear plate 42 behind the heating chamber 40, and a heating chamber 40 are provided. 4
A cover 43 covering the upper surface and the left and right side surfaces of the
It is composed of The front plate 41 and the rear plate 42 are erected on the bottom plate 44, and the cover 43 is fixed to the front plate 41 and the rear plate 42.

The outer peripheral edges of the front plate 41 and the rear plate 42 are bent inward to form a flange 45. Also, the cover 43
Is formed by folding a front edge of one metal plate to form a claw 46,
Also, after the rear edge is bent to form the bent body 47, the bent body 47 is formed into a substantially U-shape to manufacture. Then, the claws 46 at the front edge of the cover 43 are engaged with the front plate 41 by sandwiching the flange 45 of the front plate 41, and the bent body 47 at the rear edge is screwed to the rear plate 42.

By the way, the shape of the front plate, the rear plate, and the cover is mainly based on a straight line in consideration of usability as a microwave oven and production cost, but the needs of consumers are high. Along with the diversification, a demand for a microwave oven adopting a new design with a rounded appearance is increasing. When such a design is adopted, a cabinet structure including a curved surface is obtained.

[0005]

However, in the case of adopting a design in which the cabinet is curved, in the case of a cover having a conventional structure, there are claws over almost the entire front and rear edges of the cover. It acts, makes the hips stiffer, the cover cannot be bent, and cannot be used as it is. Therefore, it is necessary to separately prepare a cover which is curved in accordance with the shapes of the front plate and the rear plate, and it is necessary to prepare a mold for forming the cover. Was.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a heating cooker which is adaptable to a cabinet structure having a curved surface by changing the structures of claws and bent bodies at the front and rear edges of the cover using a molded cover similar to the conventional one. The purpose is to provide.

[0007]

In order to achieve the above object, in the heating cooker of the present invention, when the outer peripheral edges of the front plate and the rear plate are curved, the covers attached to these are easily bent. By doing so, the cover can be curved in accordance with the shapes of the front plate and the rear plate. Therefore, the locking body of the cover is formed by cutting out a part thereof. Further, a bent body formed by bending the rear end of the cover has a part cut away.

[0008] Thus, it is possible to increase the amount of bending while maintaining the stiffness of the cover. Therefore, it is not necessary to manufacture a cover having a curved shape, so that the cost of the mold can be reduced and the manufacturing cost can be reduced. Further, since the cover is formed in a substantially U-shape as in the prior art, it can be used not only as a curved cabinet but also as a cover for a rectangular parallelepiped cooker. Here, the outer peripheral edges of the front plate and the rear plate are bent inward to form a flange, and the front edge of the cover is bent to form a locking body.

[0009] The locking body is composed of a plurality of claws engaged with a flange of the front plate, and a notch is formed between the adjacent claws. The claw portion engages the front plate by sandwiching a flange of the front plate inserted from the front of the cover. In the locking body, if the claw portions are formed at equal intervals, the cover can be curved with the same curvature.

If there is a concern that the strength of the cover is insufficient due to the difference in the size of the cover, the claws may be formed to have an arbitrary width so that the cover can be easily bent while maintaining the strength. That is, if the width of the claw portion at a certain position is made larger than that of another claw portion, the strength of the waist of the cover is maintained at that position, and insufficient strength of the cover can be prevented. As an example of this case, if the width of the claw located at the center of the locking body is formed larger than the width of the claw at the end, the strength of the cover can be maintained, and the curvature of the end and the center can be improved. Cover having a different curvature can be manufactured. In other words, the curvature can be freely controlled by adjusting the width of the claw portion.

The form of the claw portion of the cover includes a form formed by bending an end of the cabinet and a form formed by fixing a claw as a separate member to one end of the cover. Here, if the locking pieces are formed by connecting the front ends of the claws, the contact area with the flange of the front plate increases, so that the strength when the cover is mounted can be increased.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described with reference to the drawings. 1 is an exploded perspective view of the microwave oven, FIG. 2 is a perspective view of the microwave oven, and FIGS. 3 and 4 are views of the cover 1 as viewed from below. The microwave oven according to the present embodiment has a structure in which the upper surface of the cabinet 2 is curved. The cabinet 2 includes a front plate 4 attached to the periphery of the opening of the heating chamber 3, and a rear side of the heating chamber 3. It comprises a rear plate 5, a bottom plate 6, and a cover 1 that covers the upper surface and the left and right side surfaces of the heating chamber 3. The outer peripheral edges of the upper portions of the front plate 4 and the rear plate 5 are curved upward.

An outer peripheral edge of the front plate 4 is bent inward, and an upper flange 7 and a lower flange 8 are formed on the upper and lower portions of the front plate 4, respectively, and a horizontal flange 9 is formed on left and right sides. At this time, the corner portion 10 of the front plate 4 is cut out to make it easy to bend the flange. Similarly, the rear plate 5 has an upper flange 7, a lower flange 8, and a horizontal flange 9 similarly to the front plate 4.

The cover 1 is formed by bending a single flat plate into a substantially U-shape. An upper locking body 20 for engaging the upper flange 7 of the front plate 4 is formed on the front side. A horizontal locking body 21 for engaging the horizontal flange 9 is formed. As shown in FIG. 4, the upper locking body 20 is obtained by bending a comb-shaped convex piece 22 formed at an end of the cover 1. The protruding piece 22 is folded inward from the base line a and further bent outward at the intermediate line b, whereby the upper locking body 20 is completed. As a result, FIGS.
As shown in FIG. 5, a plurality of claw portions 23 are formed on the upper locking body 20 and open forward.

At this time, a space formed between the adjacent claws 23 is a notch 24. The claw portion 23 has a substantially cross section.
J-shaped, the tip is slightly bent down,
The upper flange 7 of the front plate 4 is easily sandwiched. Also,
The horizontal locking body 21 is similarly formed in a substantially J-shaped cross section.

In this embodiment, since only the upper surface of the cover 1 molded and formed in a substantially U-shape is curved in accordance with the curvatures of the upper edges of the front plate and the rear plate, the horizontal locking member 21 is provided. Is not notched. Further, a lower bent body 25 bent inward is formed at the lower left and right edges of the cover 1,
Both lower bent bodies 25 are in contact with the lower surface of the bottom plate 6 so that the bottom plate 6 is sandwiched by the cover 1.

As described above, the notch 24 in which a part of the upper locking body 20 of the cover 1 is cut out has a lower waist than the claw 23, and the cover 1 is easily bent. Therefore, it can be curved in accordance with the shape of the front plate 4. Also,
Since the claw portions 23 are formed at equal intervals, the cover 1 can be curved at a constant curvature.

On the rear side of the cover 1, the outer rim is bent inward to form an upper bent body 26 and a lateral bent body 27.
Are formed. The upper bent body 26 is formed with a concave portion 28 having a part cut out at equal intervals. The concave portion 28 allows the cover 1 to bend.

A screw hole 30 is formed in the convex portion 29 between the adjacent concave portions 28, and is fixed to the rear plate 5 by screws 31. The length L of the concave portion 28 is about 4 to 6 mm and the convex portion 29
Is preferably at least 10 mm. In addition,
In the present embodiment, since only the upper part of the rear plate 5 is rounded, the left and right laterally bent bodies 27 are not notched.

Next, the assembly of the cabinet 2 will be described. The lower flanges 8 of the front plate 4 and the rear plate 5 fixed to the heating chamber 3 are fixed to the bottom plate 6 with screws 31, and the front plate 4 and the rear plate 5 are erected. Then, a cover molded and formed in a substantially U-shape is prepared, and while the upper surface of the cover 1 is curved, the lower bent body 25 of the cover 1 is moved along the lower surface of the bottom plate 6 and the cover 1 is slid forward. To go.

The upper flange 7 of the front plate 4 is sandwiched and engaged by the claw portions 23 of the upper engaging body 20, and the horizontal flange 9 is simultaneously sandwiched and engaged by the lateral engaging body 21. At this time, the upper surface of the cover 1 is curved according to the curvature of the upper flange 7 of the front plate 4. Thereafter, since the upper bent body 26 and the lateral bent body 27 of the cover 1 abut on the rear plate 5, the cover 1 is fixed to the rear plate 5 with screws. Thus, the cabinet 2 whose upper surface is curved is completed.

(Second Embodiment) In this embodiment, as shown in FIG. 8, in order to improve the strength of the cover 1, the claw portion 23 of the upper locking body 20 is formed with an arbitrary width. The other configurations of the cabinet 2 are the same as those of the first embodiment. Even if the strength of the cover 1 is insufficient due to the difference in size of the cover 1, the mounting strength at the time of mounting the cover 1 can be improved by forming the claw portion 23 with an arbitrary width. Further, since the cover 1 can be bent due to the presence of the notch 24, the design is not impaired.

Here, by forming the claw portions 23 located at the center to be wider than the claw portions 23 located at the ends, the intervals between the notches 24 become random. That is, the claw portion 23
In the central part where the width of the cover 1 is large, the strength of the cover 1 increases, so that the cover 1 is hardly bent. On the other hand, it becomes easy to bend at the end. Thereby, the cover 1 having a shape in which the curvature of the end portion of the cover 1 is different from the curvature of the central portion can be produced.

(Third Embodiment) In this embodiment, FIG.
As shown in FIG. 10, in order to improve the mounting strength of the cover 1, the front end of the claw portion 23 is connected, and the other structure is the same as that of the first embodiment. By connecting the front ends of the claws 23, the mounting strength when the cover 1 is mounted can be increased.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. For example,
In the above embodiment, the upper surface of the cover has a curved shape, but the side surface may be curved, and the horizontal locking body and the horizontal bent body may be partially cut away. This allows the entire cabinet to have a curved shape. Further, the concave portion of the bent body of the cover may be formed to have an arbitrary width. Further, in the present embodiment, the mode in which the cabinet of the microwave oven is curved is illustrated, but the present invention can be applied to a cabinet of a heating cooker other than the microwave oven.

[0026]

As is apparent from the above description, according to the present invention, a cover which is formed in a substantially U-shape as in the prior art is used, and is fixed to the locking body engaging with the front plate and the rear plate. Since each of the bent bodies to be cut is partially cut out and can be bent, the cover can be easily bent while maintaining the predetermined strength of the cover. Therefore, it is not necessary to manufacture a cabinet that is curved in advance as a separate part, and the manufacturing cost can be reduced.

Further, by changing the positions where the claws and the notches are formed in the locking body, the curvature of the cover can be freely controlled, and the mounting strength of the cover can be adjusted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a microwave oven cabinet according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a microwave oven with a door removed.

FIG. 3 is a view of the cover viewed from below.

FIG. 4 is a view showing a cover before an upper locking body is formed.

FIG. 5 is a perspective view of an upper locking body.

6A is a sectional view taken along line BB of FIG. 3, and FIG. 6B is a sectional view taken along line CC of FIG.

FIG. 7 is a rear view of the cover.

FIG. 8 is a view of the cover of the second embodiment as viewed from below.

FIG. 9 is a view of the cover of the third embodiment as viewed from below.

FIG. 10 is a perspective view of an upper locking body of the third embodiment.

FIG. 11 is a perspective view of a conventional microwave oven.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover 2 Cabinet 4 Front plate 5 Rear plate 7 Upper flange 9 Horizontal flange 20 Upper stopper 23 Claw portion 24 Notch 25 Upper bent body 27 Horizontal bent body 28 Depression

Claims (6)

[Claims] 1. A front plate is arranged around an opening of a heating chamber, a cover for covering the heating chamber is attached to the front plate, and the cover is engaged with the curved outer peripheral edge of the front plate. A heating cooker provided with a body, wherein a part of the locking body is cut out to bend the cover in accordance with the curved front plate. 2. A rear plate having a curved outer peripheral edge is disposed behind the heating chamber, and a cover is provided with a bent body attached to the outer peripheral edge of the rear plate. The heating cooker according to claim 1, wherein a part of the bent body is cut out to bend the cover. 3. The locking body comprises a plurality of claw portions engaging with the front plate, a notch is formed between adjacent claw portions, and the claw portions are arranged at equal intervals. Claim 1 or 2
The heating cooker as described. 4. The locking body comprises a plurality of claws engaged with a front plate, a notch is formed between adjacent claws, and the claws are formed to have an arbitrary width. The heating cooker according to claim 1 or 2, wherein 5. The cooking device according to claim 4, wherein the claw located at the center is wider than the claw located at the end. 6. The cooking device according to claim 3, wherein the claw portion has a structure for sandwiching the outer peripheral edge of the front plate, and the front ends of adjacent claw portions are connected.