JP3208372B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device, and more particularly to a cooking device such as a microwave oven.

[0002]

2. Description of the Related Art FIG. 1 is a perspective view showing a microwave oven as an example of a heating cooker. FIG. 1A shows a state in which a door is closed, and FIG. 1B shows a state in which the door is opened. Is shown.

Referring to FIGS. 1A and 1B, a microwave oven 1 includes a main body 2 having a heating chamber 50 for storing food.
And a cavity front plate 60 provided around the opening of the heating chamber 50 and on the front surface of the main body 2, and provided on the front surface of the main body 2 covering the opening of the heating chamber 50 and the cavity front plate 60. , And a door 3 provided to open in a vertical direction with respect to the heating chamber 50.

The main body 2 has a control panel 6 and a plurality of legs 8. Further, the door 3 is provided with a handle 3a for the user to open and close the door 3.

FIG. 16 shows an example of a conventional microwave oven. As shown in FIG.
It is sectional drawing shown by a Y line.

Referring to FIG. 16, in this microwave oven, main body 2 and door 3 are connected via a roller base 580 as a support member. This roller base 580
Is composed of a first member 580a and a second member 580b. In addition to the roller base 580, a door arm 55 for adjusting the opening and closing of the door 3 is interposed between the main body 2 and the door 3.

FIG. 17 is a perspective view showing a main body 2 of a conventional microwave oven. Referring to FIG. 17, below the cavity front plate 60, two support member openings, a heating chamber side roller base opening 32 and a control panel side roller base opening 34, are formed. A part of the first member 580a of the roller base 580 is inserted. In addition, below the cavity front plate, the aforementioned 2
Immediately above the two support member openings 32, 34, two door arm openings, a heating chamber side door arm opening 31 and a control panel side door arm opening 33, are formed. Is to be inserted.

As shown in FIG. 17, in a conventional microwave oven, a heating chamber side door arm opening 31, a heating chamber side roller base opening 32, a control panel side door arm opening 33, and a control panel side roller base opening 34. Were formed in a rectangular shape.

[0009]

As described above, in the conventional microwave oven, the roller base 580 is provided with the first member 5.
80a and the second member 580b.

[0010] However, the inventors have been studying to form the roller base with one member in order to reduce the manufacturing cost, but found that the following problems occur at that time.

FIGS. 18 and 19 are views for explaining a problem that occurs when the roller base is formed of a single member in a conventional microwave oven. 18 and 19, (A) is a diagram showing the shape of the roller base opening 34, and (B) is a part of the roller base 58, which is a part inserted into the roller base opening 34. It is a perspective view,
(C) is a sectional view showing a state where a part of the roller base 58 is inserted into the roller base opening 34.

First, as shown in FIG.
When the width of the roller base opening 34 is large with respect to the thickness of the microwave oven, there is a problem that the dispersion in the assembly process of the microwave oven becomes large.

In general, in a microwave oven in which a door is opened in a vertical direction with respect to a heating chamber, a resin component expands due to a temperature change between a portion where the control panel 6 is provided and the door 3. It is necessary to provide a gap of 0.8 to 1.8 mm in consideration of the contact prevention and the appearance balance. For example, if the width of the gap is wide, radio wave leakage may occur, while if the width of the gap is narrow, the door may not be able to open and close smoothly due to thermal expansion.

However, as shown in FIG. 18, when the width of the roller base opening 34 is large, the width of the gap becomes large in the assembled product. As a result, there has been a problem that the yield of the product is reduced, and the time and labor for adjustment during the assembling work are increased, thereby increasing the manufacturing cost.

On the other hand, as shown in FIG. 19, when the width of the roller base opening 34 is small, the workability during the assembling operation is reduced. As a result, there was a problem that the number of productions decreased.

It is an object of the present invention to provide a heating cooker which solves the above-mentioned problems and has high efficiency at the time of assembling work and can reduce the manufacturing cost.

[0017]

According to a first aspect of the present invention, there is provided a heating cooker having a main body having a heating chamber for accommodating food, and a cavity provided around the opening of the heating chamber and in front of the main body. A front plate, and a door provided on the front surface of the main body so as to cover the opening of the heating chamber and the cavity front plate, and provided so as to open in a vertical direction with respect to the heating chamber. It is connected via a plurality of support members inserted into a plurality of support member openings formed below the front plate, and at least one of the plurality of support member openings is a first at a first height from below. And the upper part has a second width smaller than the first width.

According to a second aspect of the present invention, in the cooking device of the first aspect, the first height is larger than a width of a portion of the support member inserted into the support member opening.

According to a third aspect of the present invention, in the heating cooker according to the first or second aspect of the present invention, a switch structure that operates according to opening and closing of a door is further attached to the cavity front plate. A reinforcing means for preventing deformation of a switch lever shaft supporting a switch lever for operating a predetermined switch in response to opening and closing of a door is provided.

According to a fourth aspect of the present invention, in the heating cooker according to the third aspect of the present invention, the reinforcing means comprises a metal rod inserted into the switch lever shaft.

According to a fifth aspect of the present invention, in the heating cooker according to the fourth aspect of the present invention, the metal bar is fixed by a pushing portion formed on the cavity front plate.

According to a sixth aspect of the present invention, in the heating cooker according to the third aspect of the present invention, the cavity front plate has a bent portion, and the reinforcing means has a bent portion formed on the switch lever shaft. Through the bend.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 2 and 3 show a microwave oven as an example of the cooking device according to the present invention. FIG. 2 shows the microwave oven with the door closed as shown in FIG. FIG. 3 is a sectional view in a state where a door is opened as shown in FIG.

Referring to FIGS. 2 and 3, the microwave oven includes a main body 2, a cavity front plate 60 provided on the front surface of main body 2, and door 3.

The main body 2 and the door 3 are connected via a roller base 58 as a support member. This roller base 58
Is composed of a single member. In addition to the roller base 58, a door arm 55 for adjusting the opening and closing of the door 3 is interposed between the main body 2 and the door 3.

The roller base 58 is inserted into a roller base opening 340 formed below the cavity front plate 60, while the door arm 55 is located below the cavity front plate 60 and has the aforementioned roller base opening 340. Is inserted into a door arm opening 33 formed just above the door arm.

A roller 57 is mounted on the roller base 58, and a spring 5 is provided between the roller base 58 and the door arm 55.
9 are interposed. When the door 3 is opened, the state shown in FIG. 2 changes to the state shown in FIG. 3, and the door arm 55 rotates counterclockwise while shifting the contact point with the roller 57.

FIG. 4 is a view for explaining the shape of the roller base opening of the microwave oven according to the present invention. In FIG. 4, (A) shows an opening 34 for the roller stand on the control panel side.
FIG. 8B is a perspective view showing a part of the roller base 58 which is inserted into the roller base opening 340, and FIG. It is sectional drawing which shows the state in which a part of base 58 was inserted.

Referring to FIG. 4, roller panel opening 340 on the control panel side has a height of 30 mm as a whole. At a height of 17.5 mm from below, the width is 4.
5 mm, the upper 4.5 mm is gradually narrowed upward in a tapered shape, and the remaining 8 mm above is 2.5 mm in width.

The width of the portion of the roller base 58 inserted into the roller base opening 340 is 10 mm, and the thickness thereof is 1.6.
mm.

Here, in this embodiment, the roller base opening 340 has a width of 4.5 mm which is the maximum width of the roller base opening 340 from below to the first height L ₂ . the height L ₂ of the first is greater than the width L ₁ of the insertion portion of the roller table 58. Therefore, workability at the time of assembly work is improved. In addition, the above-described tapered portion of the roller base opening 340 functions as a guide in the operation of inserting and assembling the roller base 58, so that workability can be further improved.

FIG. 5 shows an actual assembly of the microwave oven of the present embodiment in which the control panel side roller base opening is formed in the shape shown in FIG. 4, and a door 3 and a control panel 6 of the assembled microwave oven are provided. FIG. 9 is a diagram showing a result of measuring a width of a gap between the portion and a bent portion.

In FIG. 5, the horizontal axis represents the electric current shown in FIG.
The width W of the gap below the child range ₁And the vertical axis indicates
Similarly, the gap above the microwave oven shown in FIG.
Width W_TwoIs shown.

[0035] With reference to FIG. 5, in all the microwave oven assembly, none of the width W ₂ of width W ₁ and the upper gap below the gap, 0.8Mm～1.8M all provisions
It can be seen that it is within the range of m.

On the other hand, in FIG. 6, the microwave oven of the comparative example in which the control panel side roller base opening is formed in the shape shown in FIG. 18 is actually assembled, and the door 3 and the control panel 6 of the assembled microwave oven are provided. FIG. 9 is a diagram showing a result of measuring a width of a gap between the portion and a bent portion.

In FIG. 6, the horizontal axis represents the electric current shown in FIG.
The width W of the gap below the child range ₁And the vertical axis indicates
Similarly, the gap above the microwave oven shown in FIG.
Width W_TwoIs shown.

Referring to FIG. 6, in this comparative example,
The width W ₁ of the lower gap, either one of the width W ₂ of the upper gap, or both are defined 0.8mm~1.8mm
It can be seen that there is a case where it goes out of the range.

Note that the cavity front plate 60 is
As shown in FIG. 5, there are two roller base openings, a heating chamber side roller base opening 32 and a control panel side roller base opening 34, and the control panel side roller base opening 3 is provided.
Preferably, only 4 is formed in the shape shown in FIG. The shape of the control panel side roller base opening 34 greatly affects the width of the gap between the door and the portion where the control panel is provided in the assembled microwave oven. Does not significantly affect the width of this gap. However, similarly to the control panel-side roller base opening 34, the heating chamber-side roller base opening 32 may be formed in a shape as shown in FIG.

Next, the improvement of the switch structure in the present invention will be described below. FIG. 7 is a sectional view showing an example of a switch structure in a microwave oven. This switch structure is a mechanism for preventing high-frequency radio waves from being emitted when the door is open.

Referring to FIG. 7, this switch structure is mounted on cavity front plate 60 and operates according to opening and closing of door 3. This switch structure includes a switch lever 151 supported on a switch lever shaft 152,
The switch lever 151 operates a predetermined switch according to opening and closing of the door.

Hereinafter, the operation of the switch structure will be described.
This will be described with reference to the drawings. 8 and 9 are cross-sectional views for explaining an operation of an example of a switch structure in a microwave oven. FIG. 8 shows a state in which the door 3 is closed, and FIG.
Indicates a state in which the door 3 is opened.

Referring to FIGS. 8 and 9, a switch case 150 for storing a door switch and a switch case 170 for storing a monitor switch protrude from switch cases 150 and 170, respectively.
0, 170, switch button 1 which operates as door switch and monitor switch respectively
5a and 17a are provided. One end of a spring 153 is connected to a part of the switch lever 151.

When the door shown in FIG. 8 is closed, the convex portion 3b of the door 3 is pressed against the upper end of the switch lever 151, and the switch button 15a is pushed into the switch case 150 by the lower end 151b of the switch lever 151. ing. When the door is opened from this state as shown in FIG. 9, the protrusion 3 b of the door 3 pressed against the upper end of the switch lever 151 moves away from the upper end of the switch lever 151. As a result, the switch lever 151 rotates counterclockwise starting from the switch lever shaft 152. At this time, the opposing portion 151a below the switch lever 151 abuts against the tip of the switch button 17a, thereby causing the switch button 17a to move as shown in FIG.
Is pushed into the switch case 170.

When the door 3 is closed from the opened state, the convex portion 3b of the door 3 is pressed against the upper end of the switch lever 151 again, and the switch lever 151 is
From the state shown in FIG. 9, the switch lever starts to rotate clockwise starting from the start point 152, and returns to the state shown in FIG.

In this way, if the door is opened during heating, the heating is controlled to be stopped.

FIG. 10 is a cross-sectional view for explaining a problem in the conventional switch structure configured as described above.

Referring to FIG. 10, in the switch structure configured as described above, the temperature of the switch structure increases during the operation of the microwave oven, and the switch lever shaft supporting switch lever 151 moves in the direction indicated by arrow P. May be deformed by being pushed by Then, as shown in FIG. 10, the projection 3b of the door 3 is placed on the upper end of the switch lever 151.
Is pressed, the switch button 15a pushed into the switch case 150 by the lower end 151b of the switch lever 151 projects from the switch case 150. As a result, there is a so-called switch-off problem that heating is stopped during the operation of the microwave oven even though the door is kept closed.

To solve such a problem, the present inventors have improved the switch structure as follows.

FIG. 11 shows a conventional switch structure.
FIG. 2 is a partial cross-sectional view showing a part of a cross-section taken along line XX of FIG. 11A is a diagram illustrating the entire switch structure, and FIG. 11B is an enlarged view of a portion indicated by B in FIG.

Referring to FIGS. 11 (A) and 11 (B), a conventional switch lever shaft 152 is formed of a cylindrical shaft member 1521 whose diameter becomes slightly narrower toward its tip. It was not in contact with the bent portion 65 of the face plate.

FIG. 12 is an example of an improved switch structure, and is a partial sectional view showing a portion similar to FIG.

Referring to FIG. 12, in this switch structure, a metal rod 1525 is inserted into the center of shaft member 1521 so as to penetrate bent portion 65 of the cavity front plate, so that switch lever shaft 152 is formed. Has been reinforced. A protrusion 1525a is formed on the metal rod,
Thereby, it is fixed at a predetermined position.

Note that the metal rod is an R in FIG.
Can be inserted from the base portion of the switch lever shaft 152 shown in FIG. 12, but as shown in this example, it is more effective to insert the switch lever shaft 152 from the front end portion shown by Q in FIG. The switch lever shaft 152 can be reinforced.

As a result, even if the temperature of the switch structure rises during the operation of the microwave oven, it is possible to prevent the switch from being cut off due to the deformation of the switch lever shaft.

FIG. 13 is a partial cross-sectional view showing another example of the improved switch structure, which is similar to FIG.

Referring to FIG. 13, in this switch structure, the pusher 6 is provided at the bent portion 65 of the cavity front plate.
5a is formed, and the tip of the metal rod 1525 inserted into the shaft member 1521 is fitted and fixed in the push portion 65a. Note that the other configuration is completely the same as the example shown in FIG. 12, and a description thereof will be omitted.

Thus, the switch lever shaft 152
As a result, the occurrence of switch disconnection due to deformation of the switch lever shaft is prevented.

FIG. 14 is a partial cross-sectional view showing still another example of the improved switch structure, which is similar to FIG.

Referring to FIG. 14, in this switch structure, a projection 1522a is formed at the tip of shaft member 1522, and this projection 1522a is configured to penetrate bent portion 65 of the cavity front plate. .

Thus, the switch lever shaft 152
As a result, the occurrence of switch disconnection due to deformation of the switch lever shaft is prevented.

FIG. 15 is still another example of the improved switch structure, and is a partial sectional view showing a portion similar to FIG.

Referring to FIG. 15, in this switch structure, the push-in portion 6 is provided on the bent portion 65 of the cavity front plate.
5a is formed, and the tip of the projection 1522a formed at the tip of the shaft member 1522 is fitted and fixed to the pusher 65a. Note that the other configuration is completely the same as the example shown in FIG. 14, and a description thereof will be omitted.

In this manner, the switch lever shaft 152
As a result, the occurrence of switch disconnection due to deformation of the switch lever shaft is prevented.

[0065]

As described above, according to the present invention, at least one of the plurality of support member openings has the first width from the lower side to the first height, and the upper side has the first width. It has a smaller second width. Therefore, workability is improved in the assembling work of the microwave oven, and variation between products is reduced, so that there is an effect that manufacturing cost can be reduced.

Further, according to the present invention, by providing the reinforcing means for preventing the deformation of the switch lever shaft supporting the switch lever, the occurrence of the switch disconnection due to the deformation of the switch lever shaft during the operation of the microwave oven. This has the effect of being prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a microwave oven as an example of a cooking device.

FIG. 2 is a microwave oven as an example of the heating cooker according to the present invention, wherein YY is in a state where a door shown in FIG. 1 (A) is closed.
It is sectional drawing shown by a line.

FIG. 3 is a cross-sectional view showing a microwave oven as an example of the cooking device according to the present invention, in a state where a door shown in FIG. 1 (B) is opened.

FIG. 4 is a view for explaining a shape of an opening for a roller base of a microwave oven according to the present invention.

FIG. 5 is a view showing a result of measuring a width of a gap between a door of a microwave oven and a portion where a control panel is provided after the microwave oven according to the present invention is actually assembled and assembled.

FIG. 6 is a view showing a result of actually assembling a microwave oven of a comparative example and measuring a width of a gap between a door provided with a control panel and a portion of the microwave oven after assembly.

FIG. 7 is a cross-sectional view illustrating an example of a switch structure in a microwave oven.

FIG. 8 is a cross-sectional view illustrating an operation of an example of a switch structure in a microwave oven.

FIG. 9 is a cross-sectional view illustrating an operation of an example of a switch structure in a microwave oven.

FIG. 10 is a cross-sectional view for explaining a problem in a conventional switch structure.

FIG. 11 is a diagram showing a conventional switch structure, which is denoted by X in FIG.
FIG. 3 is a partial cross-sectional view showing a part of a cross section indicated by -X-ray.

FIG. 12 is a partial cross-sectional view showing an example of an improved switch structure.

FIG. 13 is a partial cross-sectional view showing another example of the improved switch structure.

FIG. 14 is a partial cross-sectional view showing still another example of the improved switch structure.

FIG. 15 is a partial sectional view showing still another example of the improved switch structure.

16 is an example of a conventional microwave oven, and FIG.
It is sectional drawing shown by the YY line in the state which closed the door shown to (A).

FIG. 17 is a perspective view showing a main body of a conventional microwave oven.

FIG. 18 is a diagram for describing a problem that occurs when a roller base is formed of a single member in a conventional microwave oven.

FIG. 19 is a view for explaining a problem that occurs when a roller base is formed of a single member in a conventional microwave oven.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microwave oven 2 Main body 3 Door 3a Handle 3b Convex part 6 Control panel 31 Opening for heating room side door arm 32 Opening for heating room side roller stand 33 Opening for control panel side door arm 34,340 Opening for control panel side roller stand 50 Heating room 55 Door arm 57 Roller 58, 580 Roller stand 59 Spring 60 Cavity front plate 65 Bent portion of cavity front plate 151 Switch lever 152 Switch lever shaft 1521, 1522 Shaft member 1525 Metal rod In each drawing, the same reference numerals are the same or equivalent. Show the part.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24C 15/02 F24C 7/02 521 A47J 37/08

Claims (6)

(57) [Claims] 1. A main body having a heating chamber for storing food, a cavity front plate provided around the opening of the heating chamber and provided on a front surface of the main body, and the opening of the heating chamber and the cavity A door provided on the front surface of the main body so as to cover the cavity front plate, and provided to open in a vertical direction with respect to the heating chamber, wherein the main body and the door are provided below the cavity front plate. The plurality of support member openings are connected via a plurality of support members inserted into the formed plurality of support member openings, and at least one of the plurality of support member openings has a first width at a first height from below. And a cooking device having an upper portion having a second width smaller than the first width. 2. The cooking device according to claim 1, wherein the first height is larger than a width of a portion of the support member inserted into the support member opening. 3. A switch structure that operates according to the opening and closing of the door is further attached to the cavity front plate, and the switch structure supports a switch lever that operates a predetermined switch according to the opening and closing of the door. The heating cooker according to claim 1 or 2, further comprising a reinforcing means for preventing deformation of the switch lever shaft. 4. The cooking device according to claim 3, wherein said reinforcing means comprises a metal rod inserted into said switch lever shaft. 5. The cooking device according to claim 4, wherein the metal bar is fixed by a pusher formed on the cavity front plate. 6. The heating cooking according to claim 3, wherein the cavity front plate has a bent portion, and the reinforcing means is such that a protrusion formed on the switch lever shaft penetrates through the bent portion. vessel.