JPS59183223A - High-frequency heater - Google Patents

Abstract

PURPOSE:To prevent the door from being disassembled and to make screws invisible without impairing serviceability and reliability of the titled heater by welding a clamp to a door inner plate and fixing the door frame to the clamp by means of a screw for assembling so that means for holding a door outer plate assumes a latch structure on the outer peripheral end surface. CONSTITUTION:A clamp 22 is spot-welded to a door inner plate 21, and clamps a door frame 23 and a screen 25 by means of a screw 24. These parts constitute a choking structure for preventing leakage of radio waves. The door outer plate 28 assumes a latch structure by the door frame 23 and the upper end of the door outer plate 28, and the lower end thereof is fixed by a screw 29. Accordingly, only the screw 29 at the lower end of the door outer plate 28 is visible from the ouside, and other clamping screws are hidden in the inner part of the door. Henmce, average users can hardly find screws. Therefore, it is possible to prevent the door from being disassembled and cleaned up due to stains. Further, such a simple structure that an outer glass plate 32 and a window frame 33 are held between the door frame and the door outer plate, becomes possible, and since they are ultimately fastened by screws, assembly and disassembly of these parts are positively possible. Therefore, problems with respect to the reliability can be all eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a door structure for a high frequency heating device.

Conventional Structure and Problems It is well known that a high-frequency heating device has an internal heating chamber in which food is placed and cooked by high-frequency energy emitted from a magnetron. It has an opening for taking food into and out of the heating chamber and a door for opening and closing the opening. The door mounting surface at the opening of the heating chamber and the inner plate of the door were designed to make flat metal contact to prevent radio wave leakage, but in reality, due to processing,
It is difficult to achieve perfect planar contact, and radio waves may leak from a small gap between the heating chamber door mounting surface and the door inner plate. If there is a lot of radio wave leakage, the user of the high-frequency heating device and people nearby will be exposed to this high-frequency output, as well as televisions and radios.

Causes damage to communication equipment and electronic equipment. Therefore, in order to further reduce this radio wave leakage, it is common to form a choke structure inside the door to seal the radio waves. or,
In order to observe the food being cooked, it is common to have a window consisting of a screen made of a perforated metal plate that does not emit any radio waves, sandwiched between transparent sheets of glass or plastic. As described above, the door of the high-frequency heating device is formed of a rather complicated metal plate structure having a choke structure.

When the high-frequency heating device 61 is repeatedly used for cooking, steam 9 food particles and the like will adhere to the inner surface of the heating chamber side of the door, so the user will often have to clean it. However, a typical door is made of a rather complicated metal plate structure with a chalk structure on the roof, so there is one door on the oven side.
Generally, the heads of about 0 screws are exposed, and food particles can get into the gaps 1 of these screws, making it difficult to keep them clean. To solve this problem, the screws were hidden inside the door so that the screws were not visible (there are four improved doors. Doors with screws hidden inside are very easy to clean and clean. However, when the door is used repeatedly, steam and oil get inside the door and stain the window for observing food. Dirt inside the door cannot be cleaned without disassembling the door. Doors with exposed screw heads can be easily disassembled with a screwdriver and reassembled after cleaning.However, door components with a choke structure can be easily disassembled due to differences in the dimensions of the throat during assembly. It is not desirable for the user to be able to disassemble and reassemble the door because it will damage the door rule effect and there is a risk of being exposed to large amounts of high-frequency energy. It is possible to prevent the user from easily disassembling and cleaning the door.A door with screws hidden inside in this way has the advantage of completeness, but this improved door was realized. Therefore, conventionally there was a built-in type with 11,000 units, but this had problems in terms of serviceability and reliability.

Hereinafter, a conventional example will be explained based on the drawings.

FIG. 1 is a perspective view of the high-frequency heating device, with the door fully open. Food 3 is stored in the heating chamber 1 and heated and cooked, and a door 2 that can be opened and closed is provided at the opening of the heating chamber 1 in order to take the food 3 in and out.

FIG. 2 is a sectional view of a conventional door. A stand bolt 5 is welded to the door inner panel 4, which includes a door frame 6 that forms the edge of the radio wave seal, a screen 9 made of a porous metal plate that does not transmit radio waves, and a door outer panel 1 that will be described later.
A clip 7 for holding 2 is fastened together with a nut 8. At that time, the seal 1 is attached to the door inner plate 4 and the door frame 6.
The inner plate glass 11 is inserted through the door to prevent oil, food scraps, and water vapor that are scattered from the food in the heating chamber from entering the inside of the door. A pin 13 having a locking shape is stand-welded to the door outer panel 12, and this pin 13 and the clip 7 are provided at positions facing each other, forming a so-called snap-in type locking structure. There is. Further, a stand bolt 14 is welded to the door outer panel 12, an outer plate glass 15 that prevents dust from entering the door from entering the door, and a window frame 16 that visually hides the internal structure of the door. Tighten with nut 17. Furthermore, when the door handle 18 is pulled, the clip 4 and pin 1
The door handle 18 is fixed to the door frame 6 from the outside with screws 19 so that the holding means 3 does not come off.

FIG. 3 shows the disassembly and assembly sequence of the conventional door explained in FIG. To disassemble the door, first remove the screw 19 and remove the door handle 18. Next, pull the door outer panel 12 to release the pin 13 and the clip 7. Then, by removing nuts 8° and 17, all parts can be disassembled.

Also, when assembling, the assembly is performed in the reverse order of disassembly.

As described above, the conventional configuration prevents the average user from trying to clean the inside of the dirty door, but on the other hand,
If a problem occurs in the door parts, the service manga door is disassembled and the parts replaced, and then when the door is reassembled, it becomes unstable whether the clip 7 and the pin 13 are properly fitted. Furthermore, to prevent the clip 7 and pin 13 from coming loose when the door handle 18 is suddenly pulled,
Since it is fixed to the door frame 6 with screws 19, the screw heads are visible in an important part from an LA perspective. If you fasten the screws to the door handle 18 from the door skin 12 so that the screw heads are not visible, the screws will be fixed only to the door skin 12, so if you pull the door handle 18 suddenly, the chrysogua and bottle 13 may become unretained. 1
The type of fitting type shown in the conventional example had problems in terms of serviceability and reliability.

OBJECTS OF THE INVENTION The present invention prevents the average user from disassembling the door;
and hides screws internally without compromising serviceability or reliability.
This provides an improved door with hidden screws.

Structure of the Invention In order to achieve the above object, the present invention has a main body equipped with a heating chamber, a door pivotally connected to the main body for opening and closing the opening of the heating chamber, and a fastening fitting is welded to the inner plate of the door. Then, the door frame that constitutes the door choke for high-frequency sealing is fixed to this fastening metal fitting with an assembly screw, and this assembly screw is fastened to the aforementioned fastening metal fitting so that the screw head etc. does not protrude into the heating chamber side. However, the holding means of the door outer panel that covers the door frame from the outside has a locking structure at the outer circumferential end surface of the door, and is secured with screws at the opposing end surface.

Description of examples Embodiments of the present invention will be described below based on the drawings.

FIG. 4 is a sectional view of the door of the present invention.

A fastening fitting 220 is attached to the door inner plate 21. are spot welded, and a door frame 23 and a screen 25 made of a porous metal plate that does not transmit radio waves are tightened with screws 24, and these constitute a choke structure to prevent radio wave leakage.
This is an important part of safety. At that time, the door inner plate 2
1 and the door frame 23 sandwich the inner plate glass 27 through the gasket 26, and the oil splatters from the food inside the heating chamber.

Prevents food particles and water vapor from entering the inside of the door. Further, a door handle 30 is fixed to the door outer panel 28 from the inside side with screws 31, so that the screw head is not visible at all from the outside. The door outer panel 28 is the door frame 23
The upper end has a locking structure, and the lower end is fixed with screws 29. At that time, the outer plate glass 32 that prevents dust from entering the door from entering the door, and the window frame 33 that hides the internal structure of the door from the door outer panel 28 and the door frame 23.
It is held in place by holding it in place.

FIG. 5 shows disassembly 9. of the door of the present invention explained in FIG. f
+11 standing order is shown. To disassemble the door, simply remove the screws 29 at the lower end, and since the upper end has a locking structure, the door outer panel 28 can be removed, and is inserted accordingly.

The outside 111j plate glass 32 and window frame 33 can be removed. Further, by removing the screw 31, the door handle 30 can be removed, and by removing the screw 24, all parts can be disassembled. Also, when assembling, the assembly is performed in the reverse order of disassembly.

As described above, according to the present invention, the external screw is the screw 2 at the lower end.
9, the other tightening screws are hidden inside the door. Therefore, it is possible to prevent the average user from seeing the screws and having to disassemble and clean the door because it is dirty. Even if the screws 29 are removed, only the door outer panel 28, door handle 30, etc. can be disassembled. Outer plate glass 3
2. Madhwak 33. Components such as the screw 31 that are unrelated to radio wave leakage performance are screws and do not have a significant effect on radio wave leakage. Moreover, by removing those parts, the interior can be cleaned, and the purpose of disassembly by the user is achieved. Therefore, it is possible to prevent the action of removing the screws 24 that tighten the parts that have an important effect on radio wave leakage. Furthermore, the door handle 30 is not tightened to the door frame 23, which affects radio wave leakage performance, but is tightened only to the door outer panel.
The problem of radio wave leakage caused by radio waves propagating through the door handle 30 and leaking to the outside can be completely eliminated, and safety can be further improved.

On the other hand, conventionally, the outer glass plate and the window frame were fixed to the door outer panel using stud bolts and nuts, but the present invention enables a simple configuration in which they are inserted between the door frame and the door outer panel, reducing the number of parts, parts, and man-hours. We were able to reduce costs on both sides.

In addition, when a service person disassembles or repairs the product, the conventional push-in type often does not fit in completely, but with the present invention, the final screw is secured, making it possible to reliably disassemble and reassemble. Sexual problems can also be resolved.

Further, as shown in FIG. 6, the hinge 36 fixed to the bottom plate 38 with bolts and nuts and the door frame 6 are connected to the hinge bin 3 at the lower end.
7, and can be opened and closed around the hinge bin 37, the hinge 38 is extended forward to the position of the fixing screw 29 on the door outer panel 28,
Screw 29 cannot be released. In order to disassemble the door, the main body must be disassembled and the hinge 36 must be removed before the door can be removed, so there is no possibility that the user will attempt to clean the door and the door will be disassembled. By making the tab sibis 29 impossible to release from the outside of the door, a safer door can be provided.

Effects of the Invention The present invention prevents the average user from disassembling the door;
The goal is to improve safety and reliability, reduce costs, and realize an improved door with a structure that hides screws inside and makes them invisible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the high-frequency heating device when the door is open, Fig. 2 is a sectional view of the door of the conventional example, Fig. 3 is a diagram showing the disassembly and assembly order of the conventional door of Fig. 2, and Fig. 4 5 is a sectional view of a door showing one embodiment of the present invention, FIG. 5 is a diagram showing the disassembly and assembly order of the door of FIG. 4, and FIG. 6 is a sectional view of another embodiment of the present invention. 1... Heating chamber, 2... Door, 3...
... Food, 4 ... Door inner plate, 5 ... Stud bolt, 6 ... Door frame, 7 ...
...Clip, 8...Natsuto, 9...
・Screen made of porous metal plate, 1o...
Packing, 11... Inner plate glass, 12...
...Door outer panel, 13...Middle...Bin, 14...
...Stud bolt, 15...Outer plate glass,
16...Madowaku, 17...Natsuto,
18... Door handle, 19... Screw, 20... Heating chamber wall, 21... Decorative board, 22... Tightening metal fittings. , 23...door frame, 24...screw, 25...-screen made of porous metal plate, 26...packet, 27...
...Inner plate glass, 28...Door outer panel,
29... Screw, 30... Door handle, 3
1...screw, 32...outer plate glass,
33...Window frame, 34...Heating chamber wall, 35...
... Decorative board, 36 ... Hinge, 37 ...
- Hinge bin, 38...bottom plate. Name of agent Patent attorney Toshio Nakao and 1 other person □ Figure 1 Figure 3 Figure 4 Figure 5

Claims (4)

[Claims] (1) It has a main body equipped with a heating chamber and a door that opens and closes the opening of the heating chamber, which is pivotally connected to the main body. Fix the door frame that makes up the door choke for the door with an assembly screw, and fasten this assembly screw to the aforementioned fastener so that the screw head etc. does not protrude into the heating chamber side, and then attach the door frame to the door that falls from the outside. A high-frequency heating device in which the outer panel holding means has a locking structure on the outer peripheral edge of the door and is secured with screws on the opposing edge. (2) The high frequency heating device according to claim 1'95, wherein the door handle component is fixed only to the door outer panel. (3) The high-frequency heating device according to claim 1, wherein an outer plate glass and a window frame are sandwiched and held between the door outer plate and the door frame. (4) The high-frequency heating device according to claim 1, wherein the screws of the holding means for the door outer panel cannot be removed from the outside of the door.