JPH0320657Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a cooking device that heats with a heater.

(b) Prior art In general, in a cooking device that heats with a heater as in Japanese Utility Model Publication No. 59-19214, the structure of the opening of the heating chamber and the door that opens and closes the opening is as shown in FIGS. 3 and 4. It is.

In the figure, 20 is a front opening 2 for taking in and out food.
1, the heating chamber has a heater 2 inside.
2 is arranged, and heating is performed by the heater 22. 23 is an opening peripheral plate at the periphery of the front opening 21, and 24 is one side 23 of the opening peripheral plate.
It is attached to the a side via a hinge 25 and the above-mentioned one side 23
A door that rotates around the a side to open and close the front opening 21; 26 is an inner door plate provided on the door and faces the peripheral plate 23 when the door is closed; 27 is a door on one side 23a of the peripheral plate 23; The opposing peripheral plate 2
When the door switch provided near the other side 23b of 3 is turned on, the heater 22 is energized and heated. Reference numeral 28 denotes a door latch pawl provided on the door 24 as a switch operating body that maintains the closed state when the door is closed and also turns on the door switch 27.

Thus, when the door 24 is closed, the door inner plate 26 is in close contact with the peripheral plate 23 over the entire circumference,
This prevents hot air from leaking outside.

However, in the above cooker, when the upper side 23c and lower side 23d adjacent to one side 23a of the peripheral plate 23 are slightly deformed into a convex shape as shown in FIG. The door inner plate 26 is gradually separated from the peripheral plate 23 as it goes from the protruding portion P to the right side, and one side 26b of the door inner plate 26 is gradually separated from the peripheral plate 23.
is spaced apart from one side 23b of the peripheral plate 23 by a large distance (dimension d) in a state where the degree of convex deformation is amplified. In such a case, the relative positional relationship of the door latch pawl 28 with respect to the door switch 27 is shifted, and a situation arises in which the door latch pawl 28 cannot reliably bias the door switch 27.

Therefore, as shown in FIG. 6, in other cooking appliances, the door 24 has one side 23a of the peripheral plate 23 spaced apart by a dimension γ in the most closed state, and another side of the peripheral plate 23 separated by a distance γ. 23b side is the dimension
They are installed at a distance of r′ (γ′<γ). With such a configuration, a gap G is created between the door inner plate 26 and the peripheral plate 23, so that even if the upper side 23c and the lower side 23d of the peripheral plate 23 are thermally deformed as described above, the deformation is prevented. Most of the gap is absorbed by the gap G, which prevents the relative positional relationship of the door latch pawl 28 with respect to the door switch 27 from shifting, and eliminates the situation where the door latch pawl 28 cannot reliably bias the door switch 27. Note that the gap G is relatively small and the amount of hot air leaking to the outside is small, so it is not very important.

However, in the structure shown in FIG. 6, the door 24
When installing the door, care must be taken so that each part of the door inner plate 26 is separated from the peripheral plate 23 by predetermined dimensions γ and γ', which makes it difficult to install the door 24 and reduces mass production. There are drawbacks.

(f) Problems to be solved by the invention A cooking appliance in which the door latch pawl can reliably bias the door switch even if the opening peripheral plate is thermally deformed, the door can be easily attached, and mass productivity can be improved. It would be good if you could get it.

(d) Measures to solve the problem At least, when the door is closed, the two sides of the peripheral plate adjacent to one side of the opening peripheral plate on the rotation center side of the door, or the two sides of such peripheral plate It is characterized in that two sides of the door inner plate facing each other are formed in a concave shape so as to form a gap between the peripheral edge plate and the door inner plate.

(E) Effect Even if the two sides of the peripheral plate adjacent to one side of the opening peripheral plate on the side of the rotation center of the door are thermally deformed, this deformation will occur between the peripheral plate and the door inner plate. It is absorbed by the gap, and the door switch is therefore reliably energized. In addition, such a gap is formed by forming a desired side of the peripheral plate or the door inner plate into a concave shape, so that when the door is installed, the door inner plate is attached to the peripheral plate as in the conventional case. There is no need to take care to maintain a predetermined distance from the center, and mass productivity is improved.

(F) Embodiment FIGS. 1 and 2 show a cooking device according to an embodiment of the present invention.

Reference numeral 1 denotes a heating chamber having a front opening 2 for taking food in and out, and a heater 3 is disposed inside the heating chamber, and heating is performed by the heater 3.
Reference numeral 4 denotes an opening peripheral plate around the periphery of the front opening 2, and 5 is attached to one side 4a of the opening peripheral plate via a hinge 6, and rotates around the one side 4a side. The door that opens and closes, 7 is an inner door plate that is provided on the door and faces the peripheral plate 4 when the door is closed. In the door inner plate, the upper and lower two sides 7c,
7d is formed in a concave shape so as to form a gap g having a maximum dimension t of 0.5 to 0.8 mm between the peripheral plate 4 and the door inner plate 7 when the door 5 is closed. The upper and lower sides 7c and 7d of the door inner plate 7 are attached to the two upper and lower sides 4c and 4d of the peripheral plate 4 adjacent to one side 4a of the peripheral plate 4 on the rotation center side of the door 5. 5
They face each other when closed. Reference numeral 8 denotes a door switch provided near another side 4b of the peripheral plate 4 opposite to one side 4a of the peripheral plate 4. When the door switch is turned on, electricity is applied to the heater 3 to heat the heater. will be carried out. Reference numeral 9 denotes a door latch pawl provided on the door 5, which serves as a switch operation body that maintains the closed state of the door 5 when it is closed and also turns on the door switch 8.

As a result, the peripheral plate 4 is heated by the heater.
Even if the upper and lower sides 4c and 4d are thermally deformed as in the conventional case, this deformation is absorbed by the gap g previously formed between the peripheral plate 4 and the door inner plate 7, and therefore the door latch pawl 9 The door latch pawl 9 can reliably bias the door switch 8 when the door 5 is closed without shifting its position relative to the door switch 8.

Furthermore, the gap g is formed by forming the upper and lower sides 7c and 7d of the door inner plate 7 into a concave shape, and is generated even when both ends of the upper and lower sides 7c and 7d are in contact with the peripheral plate 4. Therefore, there is no need to pay attention to the installation of the door 5 in order to form the gap g as in the conventional case, and the door 5 can be easily installed, improving mass productivity.

In addition, in the above embodiment, the upper and lower sides 4 of the peripheral plate 4 are
The thermal deformation of c and 4d was taken into consideration.
The other sides 4a and 4b of the peripheral plate 4 are as follows. First, with respect to thermal deformation of the side 4a on the door rotation center side, the deformation does not shift the relative positional relationship of the door latch pawl 9 with respect to the door switch 8. That is, the door 5 is directly attached to the side 4a via the hinge 6, in other words, the relative positional relationship between the side 4a and the hinge portion of the door 5 is fixed via the hinge 6. Based on this relationship, the thermal deformation of the side 4a is suppressed, and the influence of the thermal deformation does not appear on the activation status of the door switch 8. On the other hand, thermal deformation of the other side 4b of the peripheral plate 4 does not adversely affect the relative positional relationship of the door latch pawl 9 with respect to the door switch 8. That is, the degree of such thermal deformation is small, and in this case, the thermal deformation acts on the door latch pawl 9 through the side 7b of the straight door inner plate 7, so the door latch pawl 9 is not affected by the thermal deformation. The relative positional relationship with respect to the door switch 8 is only slightly shifted by the degree. Regarding this point, although the thermal deformation of the upper and lower sides 4c and 4d of the peripheral plate 4 is slight, in this case, as explained in the conventional example, the degree of thermal deformation is amplified and the degree of thermal deformation is greatly increased toward the door latch pawl 9 side. May have adverse effects. As a result, as described above, the upper and lower sides 7c and 7d are formed in a concave shape. Of course, each side 7 of the door inner plate 7
Similarly, a and 7b may be formed in a concave shape.

Furthermore, in the above embodiment, the door inner plate 7
Although a concave shape is formed on the side, concave shapes may be formed conversely in the peripheral edge plate 4 at positions corresponding to the concavely formed sides of the door inner plate 7.

Furthermore, in the above embodiment, the gap g is relatively small, and the amount of hot air leaking to the outside is small, causing almost no problem. In addition, even when the cooker uses microwave heating in addition to heater heating, such a gap g hardly causes a problem because the microwave hardly leaks to the outside.

(g) Effects of the invention According to the invention, the door latch pawl can reliably bias the door switch even if the periphery of the opening of the heating chamber is thermally deformed, and the door can be easily installed, increasing mass production. It is possible to obtain an extremely practical cooking device that can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the cooking device according to the embodiment of the present invention;
3 is a perspective view of the conventional cooker, FIG. 4 is a sectional view of the same essential part, FIG. 5 is a sectional view of the same essential part when the opening peripheral plate is thermally deformed, and FIG. FIG. 6 is a sectional view of a main part of another conventional cooking device. DESCRIPTION OF SYMBOLS 1... Heating chamber, 2... Front opening, 3... Heater, 4... Opening peripheral plate, 5... Door, 7... Door inner plate, 8... Door switch, 9... Door latch claw.

Claims (1)

[Scope of utility model registration request] A heating chamber having an opening for taking food in and out and heating with a heater, an opening peripheral plate around the periphery of the opening, a door that rotates around one side of the peripheral plate to open and close the opening, and a door provided on the door. an inner door plate facing the peripheral plate when the door is closed; a door switch provided near another side of the peripheral plate opposite to one side of the peripheral plate on the rotation center side of the door; In a cooking appliance including a switch operating body provided on the door and operating the door switch when the door is closed, at least two of the peripheral plates adjacent to one side of the peripheral plate on the rotation center side of the door are provided. Two sides of the inner door plate facing each other when the door is closed are formed in a concave shape to form a gap between the circumferential plate and the inner door plate. A cooker featuring: