JP2000227228A - Heating cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely prevent a door body from falling down while facilitating the door body to fall down in a door of a heating cooking apparatus such as an electronic oven. SOLUTION: Before a first hinge pin 4 falls down from a first hinge hole 7 upon a door being substantially fully opened, a surface B of door falling prevention means 15 makes contact with a surface G of hinge hole holding means 9 to prevent a door body 3 from falling down. In contrast, when the door body 3 is located in a certain angle region, demounting is facilitated because of a gap between a surface A of the door falling prevention means 15 and the surface D of the hinge hole holding means, and after a casing 11 is mounted, the door body 3 is prevented from falling down owing to overlapping of a window frame flange portion 13 and a casing window portion 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and cooking apparatus, and more particularly to a structure for attaching a microwave oven door to a heating chamber.

[0002]

2. Description of the Related Art A conventional cooking apparatus of this type has a heating chamber 1 for accommodating an object to be heated, as shown in FIGS. 8 and 9, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 8-219468. And heating means 2 such as a magnetron. The door body 3 is used to prevent hot air in the heating chamber 1, steam generated from the object to be heated, generated gas and electromagnetic waves from leaking out of the apparatus body.
Was provided on the front surface of the heating chamber 1. Same direction (downward in the figure)
A hinge pin holding means 6 having a first hinge pin 4 and a second hinge pin 5 protruding from the door body 3 is attached to the door body 3. The first hinge hole 7 and the second hinge pin 7 are formed in the wall of the heating chamber 1 at the portion where the first hinge pin 4 and the second hinge pin 5 contact.
The hinge hole 8 is provided with a first hinge hole 7 and a second hinge hole 8 held by hinge hole holding means 9, and is rotatably held by the first hinge pin 4 and the second hinge pin 5, respectively. . The window frame 10 covers the door body 3 and the hinge pin holding means 6, the casing 11 covers the heating chamber 1, and a part of the casing 11 protrudes from the front of the heating chamber 3 to form a casing flange 12. Further, the end face of the window frame 10 on the heating chamber side constitutes a window frame flange portion 13. The window frame cover 14 was provided on the heating chamber 1 side of the door body 3. Door body 3
When the first hinge pin 4 and the second hinge pin 5 are attached to the front of the heating chamber 1,
And inserted into the second hinge hole 8. When the door body 3 is closed, the casing flange 12 is
The door body 3 is prevented from falling off from the front of the heating chamber 1 by overlapping. When the door body 3 is opened, the gap between the hinge hole holding means 9 and the window frame cover 14 is removed by the first hinge pin 4 and the second hinge pin 5 because the casing flange 12 does not overlap the window frame flange 13. Of the door body 3 to prevent the door body 3 from falling off.

[0003]

However, in the conventional cooking device, in order to prevent the door body 3 from falling off, the gap between the hinge hole holding means 9 and the window frame cover 14 is formed by the first hinge pin 4. Since the length of the second hinge pin 5 must be smaller than any length, even if the door body 3 is mounted on the front surface of the heating chamber 1 while the window frame cover 14 is mounted on the door body 3, the first hinge pin is required. 4, second
However, there is a problem that both the hinge pins 5 cannot be attached to the first hinge hole 7 and the second hinge hole 8. Therefore, at the time of assembly, the window frame cover 14 had to be attached after attaching the door body 3 to the front of the heating chamber 1, but since the door body 3 was held rotatably, it was difficult to fix the position, There has been a problem that it is difficult to attach the window frame cover 14 and it is likely to cause poor appearance such as scratches. The first hinge pin 4 and the second hinge pin 4 prevent the door body 3 from dropping when the user lifts the door body 3 by mistake.
The window frame cover 14 interferes with the hinge hole holding means 9 at a moving distance shorter than any length of the hinge pin 5. When the window frame cover 14 is damaged, the door body 3 easily falls off, and thus there is a problem that the window frame cover 14 needs a sufficient strength. In particular, when the heating cooking device is a high frequency heating cooking device such as a microwave oven, metal cannot be used for the window frame cover 14 and a resin such as polypropylene is used in order to prevent radio wave leakage from the heating chamber 1. .
In order to minimize the radio wave leakage, the thickness of the resin generally had to be reduced, so that it was more difficult to obtain sufficient strength. Although it was considered to divide the window frame cover 14 to facilitate the manufacture of the heating cooking device, it was necessary to adopt a configuration in which the window frame cover was divided while having sufficient strength. was there.

[0004]

According to the present invention, in order to solve the above-mentioned problems, at least one of the hinge pin holding means and the hinge hole holding means has a door falling-off preventing means.

According to the above invention, since the door body is prevented from falling off by the hinge pin holding means or the hinge hole holding means, it is not necessary to prevent the door body from falling off by the window frame cover. It is not necessary to make the gap between the frame covers small, and the door body can be attached to the front of the heating chamber while the window frame cover is attached to the door body. The design can be made easily because it does not depend on the configuration.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first aspect of the present invention comprises a door body rotatably mounted on a front opening of a heating chamber, comprising a hinge retaining means, a hinge hole retaining means, and a hinge pin, and a door falling prevention means. The invention according to claim 2, wherein the heating chamber for storing the food, a door body attached to the front opening of the heating chamber, hinge pin holding means for holding a hinge pin for rotatably holding the door body, and fitting with the hinge pin Hinge hole holding means provided with a hinge hole to be provided, wherein the hinge pin holding means is provided with a notch groove, and the hinge pin is fitted in the hinge hole of the hinge hole holding means, and then provided with a notch groove provided in the hinge holding means. There is provided a door falling-off preventing means for fitting a part of the hinge pin holding means therein and maintaining the fitted state of the hinge pin.

Since the door body is prevented from falling off by a combination of the hinge pin holding means or the hinge hole holding means, it is not necessary to prevent the door body from falling off by the window frame cover. Therefore, the hinge hole holding means and the window frame cover are not required. The door body can be attached to the front of the heating chamber while the window frame cover is attached to the door body, and the door body can be easily attached and detached without relying on the strength of the window frame cover. The design makes it easy to design.

According to a third aspect of the present invention, the fitting of the hinge pin and the hinge hole for fixing the heating chamber for storing the cooked food, the door body attached to the front opening of the heating chamber, and the door body rotatably is specified. Door falling-off prevention means that is enabled only in the set angle range.

Since the door body is prevented from falling off by the hinge pin or the hinge hole, it is not necessary to prevent the door body from falling off by the window frame cover. Therefore, the gap between the hinge hole holding means and the window frame cover is not reduced. With the window frame cover attached to the door body, the door body can be attached to the front of the heating chamber, and the door body can be easily attached and detached.
It can be easily designed because it does not depend on the strength of the window frame cover.

According to a fourth aspect of the present invention, a casing for covering the heating chamber, a window frame for covering the door body, a casing flange provided at the casing end, and a window frame flange provided at the window frame end are provided. And a door drop-off preventing means that functions at a position where the casing flange and the window frame flange no longer overlap at a position where the door body is substantially opened.

The casing can be easily detached by removing the casing and lifting the door body upward, and by attaching the casing after attaching the door body to the front of the heating chamber, the casing flange and the window frame can be removed. Since the flanges overlap, the window frame cover does not go over the casing and goes upward, so that the assembling of the heating cooking device can be facilitated and the holding of the door body to the front of the heating chamber can be ensured. .

According to a fifth aspect of the present invention, there is provided a window frame cover provided on the heating chamber side of the door main body, and the moving distance required for the window frame cover to contact the hinge pin holding means or the hinge hole holding means is a door drop prevention means. Is larger than the moving distance required to contact the hinge pin holding means or the hinge hole holding means.

When the user accidentally lifts the door body, the door falling-off preventing means can reliably prevent the door body from falling off before the window frame cover interferes with the hinge hole holding means. It is not necessary to secure the strength of the frame cover more than necessary, and the design is easy, and the door body can be easily attached to and detached from the front of the heating chamber with the window frame cover attached to the door body.

According to a sixth aspect of the present invention, at least one of the pin holding means and the hinge hole holding means is provided with a door rotation control means.

Further, even when a force is applied to push the door body further in a state where the door body is opened, the rotation of the door body can be stopped stably.

The invention according to claim 7 has hinge pins provided at at least two places, and one of the hinge pins is longer than the other of the hinge pins.

Since one hinge pin is longer than the other hinge pin, one hinge pin can be inserted into one hinge hole first, and then the other hinge pin can be inserted into the other hinge hole. Can be installed in front of the heating chamber.

[0018] The invention according to claim 8 has a door drop prevention means, a hinge pin holding means, and a hinge hole holding means, and at least the hinge pin holding means or the hinge hole holding means for connecting the door drop prevention means. One is an integrated structure.

Since the distance between the door drop-off preventing means can be easily kept constant, at least two door drop-off preventing means can be operated at the same time, and the door body can be more reliably prevented from dropping off.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional perspective view of a main part of a heating and cooking apparatus according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of a main part of the heating cooking device, and FIGS. 3, 4 and 5 are exploded sectional views of a main part of the heating cooking device.

In FIG. 1, reference numeral 1 denotes a heating chamber for storing an object to be heated, and 2 denotes a heating means such as a magnetron. The door main body 3 is provided on the front surface of the heating chamber 1 in order to prevent hot air in the heating chamber 1, steam generated from a heated object, generated gas, and electromagnetic waves from leaking out of the apparatus main body. A hinge pin holding means 6 having a first hinge pin 4 and a second hinge pin 5 projecting downward is attached to the door body 3. On the wall of the heating chamber 1 where the first hinge pin 4 and the second hinge pin 5 abut, a hinge hole holding means 9 is provided with a first hinge hole 7.
And the second hinge hole 8 are provided and held, and the first hinge pin 4 and the second hinge pin 5 are held rotatably, respectively. The window frame 10 covers the door body 3 and the hinge pin holding means 6, and the casing 11 covers the heating chamber 1. A part of the casing 11 projects from the front surface of the heating chamber 3 to form a casing flange 12, and the end face of the window frame 10 on the heating chamber side forms a window frame flange 13. 1
3 overlaps. The window frame cover 14 is provided on the heating chamber 1 side of the door body 3. The gap between the window frame cover 14 and the hinge hole holding means 9 has a length necessary for extracting the first hinge pin 4 from the first hinge hole 7 and the second hinge pin 5 from the second hinge hole 8. Greater than any of the required lengths.

As shown in FIG. 1, the hinge pin holding means 6
Is the door drop prevention means 15, that is, the first hinge pin 7
And a surface B having a certain inclination angle, and a surface C substantially parallel to the axial direction of the first hinge pin 7 and substantially perpendicular to a straight line passing through the center of the axis. On the other hand, the hinge hole holding means 9 has a surface D substantially parallel to the axial direction of the first hinge pin 7, a cylindrical surface E that rotates around the axial center, and a tangent to the cylindrical surface E, that is, a straight line passing through the axial center. And a plane G substantially perpendicular to the axial direction. When the door body 3 is fully opened, the door rotation restricting means 1
6, ie, the surface F and the surface C are in contact with each other.

FIG. 3 shows a state where the door body 3 is closed.
Surface A of door drop prevention means 15 and surface D of hinge hole holding means 9
There is a gap between them. The window frame flange 13 enters under the casing flange 12, and has an overlapping portion.
FIG. 4 shows a state where the door body 3 is being opened. The surface A is located closer to the axial center than the surface E of the hinge hole holding means 9. There is a gap between the surface C and the surface E of the door rotation control means 16. The surface B of the door drop prevention means 15 is the hinge hole holding means 9
Is located below the surface G. The gap between the surface B and the surface G is smaller than the length required for extracting the first hinge pin 4 from the first hinge hole 7. FIG. 5 shows a state where the door is completely opened. Surface C
Is perpendicular to the surface F of the hinge hole holding means 9.
Surface B is below surface G. The casing flange 12 and the window frame flange 13 do not overlap. FIG. 6 shows the second hinge pin 5
And surface A, surface B, surface C, surface D, surface E, surface F and surface G provided in the second hinge hole 8, respectively, with those of the first hinge pin 4 and the first hinge hole 7. It has a similar configuration. The second hinge pin 5 is longer than the first hinge pin 4. Each of the hinge pin holding means 6 and the hinge hole holding means 9 has an integral structure.

Next, the operation and operation will be described. As shown in FIG. 3, when the door body 3 is almost closed, there is a gap between the surface A and the surface D, and the hinge pin holding means 6 can be moved up and down with respect to the hinge hole holding means 9. When attaching or removing 3 from the front of heating chamber 1,
By removing the casing 11 and leaving the door body 3 almost closed, the door body 3 can be easily attached and detached by lifting it upward. By attaching the casing 11 after attaching the door main body 3 to the front of the heating chamber 1, the casing flange 12 and the window frame flange 13 overlap, so that the window frame cover 14 climbs over the casing 11 and goes upward. Therefore, the door body 3 does not come off from the front of the heating chamber 1.

When the door body 3 starts to open as shown in FIG. 4, since the surface B overlaps with the surface G, the hinge pin holding means 6 moves over the hinge hole holding means 9 and moves upward. There is no. Accordingly, when the door main body 3 starts to be opened, the door main body 3 does not come off from the front surface of the heating chamber 1 irrespective of whether or not the casing flange 12 and the window frame flange 13 overlap. Since the surface E is a cylindrical surface with respect to the center of the axis of the first hinge pin 7, the surfaces C and E can rotate with a certain gap from when the door body 3 starts to open until the door body 3 is fully opened. Since the gap between the surface B and the surface G is smaller than the length required for extracting the first hinge pin 4 from the first hinge hole 7, the first hinge hole 7
Before the hinge pin 4 comes off, the door body 3 can be securely prevented from falling off. Also, the first hinge hole 7
Since the gap between the window frame cover 14 and the hinge hole holding means 9 is larger than the length required to remove the hinge pin 4 of the above, when the user accidentally lifts the door body 3, the window frame cover 14 holds the hinge hole. Before coming into contact with the means 9, the door body 3 can be reliably prevented from falling off. For this reason, it is not necessary to secure the strength of the window frame cover 14 more than necessary, and it is possible to easily design the window frame cover 14 and to keep the door body 3 almost closed while the window frame cover 14 is attached to the door body 3. By doing so, the door body 3 can be easily attached to and detached from the front of the heating chamber 1.

When the door main body 3 is fully opened as shown in FIG. 5, the surface C is perpendicular to the surface F, so that the door main body 3 can be prevented from being opened any more. Can be prevented from interfering with the casing 11. Since the surface F is substantially perpendicular to a straight line passing through the center of the first hinge pin 4 axis, when a force is applied to the door body 3 to push it further, the surface C reacts from the surface F with respect to the contact surface. Since it is received vertically, the surface C does not slide on the surface F, and the rotation of the door body 3 can be stopped stably.
Since the second hinge pin 5 is longer than the first hinge pin 4, it is possible to insert the second hinge pin 5 first into the second hinge hole 8 and then insert the first hinge pin 4 into the first hinge hole 7. Therefore, the door body 3 can be easily attached to the front of the heating chamber 1.

Further, as shown in FIG. 6, in this embodiment, since the door falling prevention means 15 is provided at two places, a force which cannot be supported by only one door falling prevention means 15 is required. Even when it is added to the main body 3, the other door falling-off prevention means 15 can more reliably prevent the door main body 3 from falling off. Further, since the hinge pin holding means 6 and the hinge hole holding means 9 are integrally formed, the distance between the surface B shown in FIG. 1 and the surface B shown in FIG. 6 and the surface G shown in FIG.
The distance between the hinge pin holding means 6 and the hinge hole holding means 9 during assembly can be kept constant irrespective of the variation in the mounting work. For this reason, even if the user lifts the door body 3 by mistake, the surfaces B and G of the two door fall-off preventing means 15 come into contact almost simultaneously, so that the door body 3 can be more reliably prevented from falling off. Can be.

(Embodiment 2) FIG. 7 is an exploded perspective view of a main part of a heating and cooking apparatus according to Embodiment 2 of the present invention. A point different from the first embodiment is that a part of the first hinge pin 4 is projected so that the surface A, the surface B,
The surface C is formed, and the surface E and the surface G are formed by cutting out a part of the first hinge hole 7. The components having the same reference numerals as those of the first embodiment have the same structure, and the description is omitted.

Next, the operation and operation will be described. Since a part of the first hinge pin 4 is protruded to form the surfaces A, B and C, and a part of the first hinge hole 7 is cut out to form the surfaces E and G, the embodiment will be described. Similarly to 1, the door body 3 can be easily attached to and detached from the front of the heating chamber 1, and can be reliably rotatably held.

The hinge pin holding means 6 is connected to the door body 3
Although the side and the hinge hole holding means 9 are provided on the side of the heating chamber 1, the present invention can be similarly applied to a configuration having the hinge pin holding means 6 on the side of the heating chamber 1 and the hinge hole holding means 9 on the side of the door body 3. it can.

Although the hinge pin holding means 6 and the hinge hole holding means 9 are each formed integrally,
Even if it is divided into two or more, the same can be implemented.

Although the hinge pin holding means 6 and the hinge hole holding means 9 are each integrally formed, the first hinge hole 7 and the second hinge hole are provided between the first hinge pin 4 and the second hinge pin 5. 8 can be implemented in the same manner, even if each of the portions connecting with 8 has a reinforcing means such as a flange or a rib.

Although the door drop-off prevention means 15 is provided at two places, it can be similarly implemented as long as it is at least one place.

[0035]

As described above, according to the present invention, the door main body, the hinge pin, and at least one of the hinge pin holding means and the hinge hole holding means have the door falling-off preventing means, and the casing flange and the window are provided. Because the frame collar is overlapped, the door body is securely held with a simple structure,
The door body can be easily attached and detached simply by removing the casing.

[Brief description of the drawings]

FIG. 1 is a cross-sectional perspective view of a main part of a heating cooking device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of the cooking device.

FIG. 3 is a sectional view of a main part of the cooking device.

FIG. 4 is a sectional view of a main part of the cooking device.

FIG. 5 is a sectional view of a main part of the cooking device.

FIG. 6 is an exploded perspective view of a main part of the cooking device.

FIG. 7 is an exploded perspective view of a main part of the heating cooking device according to the second embodiment of the present invention.

FIG. 8 is an exploded external perspective view of a main part of a conventional heating cooking device.

FIG. 9 is a cross-sectional perspective view of a main part of a conventional heating cooking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating room 3 Door main body 4 1st hinge pin 5 2nd hinge pin 6 Hinge pin holding means 7 1st hinge hole 8 2nd hinge hole 9 Hinge hole holding means 10 Window frame 11 Casing 12 Casing flange 13 Window frame flange Unit 14 Window frame cover 15 Door falling-off prevention means 16 Door rotation control means

Claims (8)

[Claims] 1. A heating / cooking apparatus comprising a door body rotatably mounted on a front opening of a heating chamber, wherein the door holding means is constituted by hinge holding means, hinge hole holding means, and hinge pins. 2. A heating chamber for accommodating a food, a door body attached to the front opening of the heating chamber, and hinge pin holding means for holding a hinge pin rotatably holding the door body.
Hinge hole holding means provided with a hinge hole to be fitted with the hinge pin, wherein the hinge pin holding means is provided with a notch groove, and after the hinge pin is fitted in the hinge hole of the hinge hole holding means, the hinge holding means A heating cooking device comprising: a door falling-off preventing means for fitting a part of the hinge pin holding means into a notch provided in the door and maintaining the hinge pin in a fitted state. 3. A fitting chamber in which a cooking chamber is stored, a door body to be mounted on the front opening of the heating chamber, and a hinge pin and a hinge hole for rotatably holding the door body are fitted in a specified angle range. A heating cooking device provided with a door falling-off prevention means that is only possible. 4. A door comprising: a casing covering a heating chamber; a window frame covering a door body; a casing flange provided at an end of the casing; and a window frame flange provided at an end of the window frame. 4. The heating and cooking apparatus according to claim 2, wherein the main body is substantially fully opened, and the door falling-off preventing means functions at a position where the casing flange and the window frame flange no longer overlap. 5. A door frame cover provided on a heating chamber side of a door body, wherein a moving distance required for the window frame cover to contact the hinge pin holding means or the hinge hole holding means is such that the door falling-off preventing means holds the hinge pin. 3. The moving distance required for contacting the holding means or the hinge hole holding means.
Or the heating cooking device according to any one of 4. 6. A door rotation control means is provided on at least one of the hinge pin holding means and the hinge hole holding means.
Or the cooking device of any one of 4 or 5. 7. The cooking device according to claim 2, further comprising at least two hinge pins, wherein one of the hinge pins is longer than the other of the hinge pins. 8. A door drop prevention means, a hinge pin holding means, and a hinge hole holding means, and at least one of the hinge pin holding means or the hinge hole holding means for connecting the door drop prevention means is integrally formed. The cooking device according to any one of claims 2 or 4 to 7, wherein