JPH0712350A - Microwave oven interior lamp structure - Google Patents

Abstract

(57) [Abstract] [Purpose] Light weight, excellent manufacturability, inexpensive manufacturing cost because it does not require expensive heat-resistant glass plate, and also has swelling resistance, internal lamp part structure for microwave oven To provide the body. In a microwave oven internal lamp part structure in which an internal lighting lamp, a mesh-shaped internal wall, and an outer member are sequentially laminated, the outer member has a perforation or a perforation at a peripheral adhesive portion of the mesh-shaped internal wall. It is a microwave oven internal lamp part structure characterized by a perforated adhesive sheet structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for a lamp part in a microwave oven, and more particularly to a structure for a lamp part in a microwave oven, which is lightweight, has low cost, is excellent in durability, and has blistering resistance. It is about.

[0002]

2. Description of the Related Art It is known that a microwave oven includes a microwave oven (oven microwave oven) as well as a single-function microwave oven. The single-function range has a structure in which microwaves are radiated into the refrigerator, and only the range cooking is performed. In addition to the above structure, the oven microwave oven can also use an oven that uses heat from a heater and grill cooking. The inside temperature of the single function range is relatively low, but the inside temperature of the microwave oven is 140 ° C to 250 ° C.

This type of microwave oven has a microwave oven main body a having an opening a1 on the front side as shown in FIGS.
And a door panel structure b attached to the opening a1 so as to be openable and closable, and a lamp part structure c is provided on a side surface or an upper part of the microwave oven body a. It has been known.

The conventional lamp part structure c is an outer member c1 made of heat-resistant glass as shown in FIG.
A main part of the inner wall c2 is made of a coated steel plate laminated on the outer member c1 and provided with a mesh m so that the light from the lamp 1 can be radiated into the interior. Although not shown, generally, the peripheral portion of the outer member c1 is shielded by heat-resistant silicone rubber.

However, the door panel structure having such a structure has a drawback that the weight thereof is heavy and the operability is poor, and that an expensive heat-resistant glass is required, resulting in a high manufacturing cost.

Under such a technical background, some of the above microwave ovens do not have an outer member made of heat-resistant glass. However, when a microwave oven without an outer member is used, the food components in the refrigerator may scatter during heating and adhere to the inner wall of the refrigerator, which may enter from the mesh portion and adhere to the lamp. When food adheres to the lamp, it cannot be wiped off, resulting in problems such as reduced brightness and malfunction.

The present inventors have already used the pressure-sensitive adhesive sheet composed of the heat-resistant synthetic resin film laminated with the heat-resistant pressure-sensitive adhesive layer as the outer member, so that the weight increases and the operability is improved. Solved the drawback of being bad. However, after sticking these pressure-sensitive adhesive sheets to the electromagnetic wave shield member, when heat is promoted, the pressure-sensitive adhesive sheet swells from the surface of the electromagnetic wave shield member in the peripheral adhesion portion of the electromagnetic wave shield member, resulting in poor appearance, There was a drawback that the product value declined.

[0008]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned conventional techniques, and is light in weight, excellent in manufacturability, and costly because it does not require an expensive heat-resistant glass plate. It is an object of the present invention to provide a microwave oven internal lamp part structure that is inexpensive and has blistering resistance.

[0009]

That is, the present invention provides a microwave oven in which an internal lighting lamp, a mesh-shaped internal wall, an outer member or an internal lighting lamp, an external member, and a mesh-shaped internal wall are sequentially laminated. In the internal lamp part structure for a microwave oven, the above-mentioned outer member is a structure for an internal lamp part for a microwave oven, which is characterized in that it has an adhesive sheet structure in which a peripheral adhesive portion of a mesh-shaped internal wall is perforated or perforated.

The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of an internal lamp part structure according to an embodiment. The lamp part structure 10 includes a film base material as an outer member 11, a pressure-sensitive adhesive layer 12 laminated on the film base material, and an air layer. Perforation processing 14 or perforation processing 15 (figure shows an example of perforation processing 15) as discharge holes, and the adhesive layer 1 on this outer member 11
2 and the inner wall 13 made of a coated steel plate on which the mesh m is attached via
The lamp 1 is installed inside the. FIG. 2 shows a sectional structure of an internal lamp part structure according to another embodiment.
2. The inner wall 13 made of coated steel plate constitutes the main part.

3 to 4 are plan views of an adhesive sheet obtained by applying an adhesive to the outer member according to the embodiment, which is perforation processing 14 or perforation processing 15. 5 and 6 are cross-sectional explanatory views of the outer member 11 provided with the pressure-sensitive adhesive layer 12 of FIGS. 3 and 4 taken along the lines AA and BB.

As the outer member, a heat resistant synthetic resin film such as a polyethylene naphthalate film, a heat resistant polyethylene terephthalate film, a polyether sulfone film, a polyether ether ketone film, a polyparabanic acid film or a polyimide film can be used. As the agent layer, a heat-resistant acrylic adhesive, silicone adhesive or the like can be used.

By the way, the cause of the blister is the air that is caught between the adhesive sheet and the inner wall of the container when the adhesive sheet is attached to the inner wall of the container. Expands and appears as a blister. For perforation processing or perforation processing, use an adhesive sheet with an adhesive on the outer member
When the heating is promoted by laminating the inside wall 13 provided with, it is effective against the blistering that occurs in the peripheral portion, and the holes opened by the processing become expanded air release holes.

Therefore, the size of the perforated or perforated hole can be arbitrarily determined according to the state of the blister generated.

[0015]

The function of the internal lamp section for the microwave oven according to the present invention is as follows.
The outer member is a pressure-sensitive adhesive sheet made of a heat-resistant synthetic resin film adhered to the inner wall of the refrigerator via a heat-resistant adhesive, and the peripheral adhesive portion of the inner wall is perforated or perforated. Therefore, even if the heating of the lamp structure is promoted after sticking the adhesive sheet, the entrained air is released from the perforations or the perforation processing part, and the swelling does not occur in the peripheral adhesion part of the inner wall of the refrigerator, which is good.

Further, as compared with the conventional internal lamp part structure in which the outer member is made of heat-resistant glass, the internal lamp part structure of the microwave oven can be significantly reduced in weight and cost. is there.

[0017]

[Examples] This example was carried out using an oven microwave oven in which the temperature conditions inside the oven are severe even among microwave ovens. If there is no problem in the microwave oven, it will not be a problem in other microwave ovens. Example 1 A polyethylene naphthalate film (PEN ... trade name “Teonex” manufactured by Teijin Ltd.) cut into a size of 50 μm and 75 × 95 mm is used as a base material and a silicone-based adhesive (manufactured by Toray Dow Corning Silicone Co., Ltd.). Product name "SD4560") is applied and dried to a thickness of 4
An outer member 11 was obtained by perforating the polyethylene naphthalate film on which the 5 μm silicone-based adhesive layer 12 was formed. Next, the inner wall 1 made of painted steel plate
3, the outer member 11 is placed so that its adhesive layer 12 side is in contact with the inner wall 13 and pressure is applied to the outer member 11, and these members are further used to form an oven microwave oven as shown in FIG. The internal lamp part structure was manufactured.

Example 2 A heat-resistant polyethylene terephthalate film (PET ... trade name “Lumirror low heat shrink type” manufactured by Toray Industries, Inc.) cut into 75 × 95 mm with a thickness of 50 μm was used in place of the polyethylene naphthalate film. Used as a silicone adhesive, Toray Dow Corning Silicone, trade name SD4580
Was applied to the heat-resistant polyethylene terephthalate film on which the silicone-based adhesive layer 12 having a thickness of 45 μm was formed, and a perforated structure was manufactured in the same manner as in Example 1 except that a perforation process was performed. .

Example 3 A polyether sulfone film (PES manufactured by Sumitomo Bakelite Co., Ltd.) having a thickness of 50 μm and cut into 75 × 95 mm instead of the polyethylene naphthalate film (Sumilite FS-130) was manufactured.
0 ”) and used as a silicone adhesive in the product name“ SD458 ”manufactured by Toray Dow Corning Silicone Co., Ltd.
0 ”was applied and a perforation process was performed on a polyether sulfone film having a silicone-based adhesive layer 12 having a thickness of 45 μm, and the lamp structure inside the oven microwave oven was manufactured in the same manner as in Example 1. Manufactured.

Example 4 Instead of the polyethylene naphthalate film, a polyether ether ketone film (PEE) having a thickness of 50 μm and cut into 75 × 95 mm was used.
K ... Sumitomo Bakelite Co., Ltd. product name "Sumilite FS"
-1100C ”), and a product name“ SD4580 ”manufactured by Toray Dow Corning Silicone Co., Ltd. is applied as a silicone-based adhesive agent to a polyether ether ketone film having a 45-μm-thick silicone-based adhesive layer 12 formed thereon. An in-compartment lamp section structure of an oven microwave oven was manufactured in the same manner as in Example 1 except that the perforation processing was performed.

<Embodiment 5> In the same manner as in Embodiment 1, the internal lamp part structure of the oven microwave oven shown in FIG. 2 was manufactured.

<Comparative Example 1> 75 × 95 m at a thickness of 50 μm
polyethylene naphthalate film (P
EN ... Teijin Co., Ltd. product name “Teonex”) is used and a silicone adhesive (Toray Dow Corning
Example 1 except that a pressure-sensitive adhesive layer 12 having a thickness of 45 μm was formed by applying a product name “SD4560” manufactured by Silicone Co., Ltd.
In the same manner as the above, an internal lamp part structure of an oven microwave oven was manufactured.

Comparative Example 2 Instead of the polyethylene naphthalate film, a heat-resistant polyethylene terephthalate film (PET ... Toray Industries, Ltd., trade name “Lumirror low heat shrink type”) cut to a thickness of 50 μm and 75 × 95 mm was used. Used as a silicone adhesive, Toray Dow Corning Silicone, trade name SD4580
Was applied to form a silicone-based adhesive layer 12 having a thickness of 45 μm, and an in-compartment lamp section structure for an oven microwave oven was manufactured in the same manner as in Example 1.

<Comparative Example 3> A polyether sulfone film (PES manufactured by Sumitomo Bakelite Co., Ltd., trade name "Sumilite FS-130" having a thickness of 50 μm and cut into 75 × 95 mm instead of the polyethylene naphthalate film.
0 ”) and used as a silicone adhesive in the product name“ SD458 ”manufactured by Toray Dow Corning Silicone Co., Ltd.
0 ”was applied to form the silicone-based adhesive layer 12 having a thickness of 45 μm, and an in-compartment lamp section structure for an oven microwave oven was manufactured in the same manner as in Example 1.

<Comparative Example 4> Instead of the polyethylene naphthalate film, a polyether ether ketone film (PEE) cut to a thickness of 50 μm and cut into 75 × 95 mm was used.
K ... Sumitomo Bakelite Co., Ltd. product name "Sumilite FS"
-1100C ") was used, and a silicone-based pressure-sensitive adhesive layer 12 having a thickness of 45 µm was formed by applying a product name" SD4580 "manufactured by Toray Dow Corning Silicone Co., Ltd. as a silicone-based pressure-sensitive adhesive. In the same manner as the above, an internal lamp part structure of an oven microwave oven was manufactured.

[Confirmation Test] Next, in order to confirm the characteristics of the lamp part structure according to each example and the lamp part structure according to each comparative example, each of these lamp part structures was attached to an oven microwave oven main body. Assembling and performing a mounting test for 500 hours, the presence or absence of swelling or peeling of the inner transparent body of each door panel structure was checked. The results are shown in (Table 1) below.

[0027]

[Table 1]

[0028] In the table, ◯ means that the outer member did not swell or peel off. For x,
It indicates that blistering or peeling of the outer member was observed.

As is clear from the results of "Evaluation" (Table 1), it was confirmed that the lamp part structures according to the examples were extremely excellent without swelling or peeling of their outer members.

On the other hand, in the lamp part structures according to Comparative Examples 1 to 4, swelling was observed in the outer member at the peripheral adhesion portion of the inner wall of the refrigerator, and good results were not obtained.

[0031]

EFFECTS OF THE INVENTION The present invention relates to the above-mentioned internal lamp portion structure for a microwave oven, which has a perforated or perforated adhesive sheet structure at the peripheral adhesive portion of the internal wall, so that heating is promoted. The generated bubbles are discharged by perforation or perforation processing, and swelling or peeling does not occur in the peripheral adhesion portion of the inner wall of the refrigerator, which is good.

Further, as compared with the conventional lamp part structure whose outer member is made of heat-resistant glass, the weight and cost can be remarkably reduced.

[0033]

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a lamp part structure of the present invention.

FIG. 2 is an explanatory view showing another embodiment of the lamp part structure of the present invention.

FIG. 3 is a plan view showing an example of an outer member provided with an adhesive layer of the present invention.

FIG. 4 is a plan view showing an example of an outer member provided with an adhesive layer of the present invention.

FIG. 5 is a cross-sectional view showing an example of an outer member provided with an adhesive layer of the present invention.

FIG. 6 is a cross-sectional view showing an example of an outer member provided with an adhesive layer of the present invention.

FIG. 7 is a perspective view showing an example of a microwave oven.

FIG. 8 is a perspective view showing an example of a microwave oven with a door panel opened.

FIG. 9 is a cross-sectional view of a conventional lamp portion structure.

[Explanation of symbols]

 10 Lamp part structure 11 Outside transparent body 12 Adhesive layer 13 Internal wall 14 Perforation processing 15 Perforation processing

Front Page Continuation (72) Koichi Hotta Inventor Koichi Hotta 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd.

Claims (1)

[Claims] 1. An internal lighting lamp, a mesh-shaped internal wall,
An outer member or an internal lighting lamp, an outer member, and a microwave oven internal lamp part structure in which a mesh-shaped internal wall is sequentially laminated, wherein the external member is a perforation or a perforation at a peripheral adhesive portion of the mesh-shaped internal wall. A microwave oven interior lamp structure characterized by a perforated adhesive sheet structure.