KR970006080B1 - Door of microwave oven - Google Patents

Abstract

The door for microwave oven blocks the effects of high frequency and improves the work efficiency by using same material of door plate as high frequency isolation material and forming the door screen by insert injection molding. The door plate(32) is inserted inside border of rectangular bar shaped door frame(30) and high frequency isolation material(34) is inserted inside border of the door plate. The door has the structure which inside glass(42) and outside glass(40) are installed inside and outside of the door(38) which excludes the link bars attached to the door plate by welding to link the high frequency isolation materials and forms the door plate as same material as high frequency isolation one.

Description

Microwave door

1 is a perspective view showing a door of a microwave oven.

2 is a perspective view showing a cross section of a conventional microwave door.

3 is a longitudinal cross-sectional view of the coupled state of the microwave oven door according to the present invention.

* Explanation of symbols for main parts of the drawings

30: door frame 32: door plate

34: high frequency blocking material 36: door screen

44: cavity 46: support rib

The present invention relates to a door of a microwave oven, and more particularly, to exclude a fastening piece installed on a door plate for coupling a high frequency barrier material (Microwave Absorber) installed on the inner edge of the door plate, the door, the door The plate itself is made of the same material as the high-frequency shielding material, but insert molding the door screen to improve the high-frequency blocking effect and workability, and to reduce the cost of the microwave oven door.

Generally, as shown in FIG. 1, the microwave oven is hinged to one side of the front surface of the cavity 10 to open and close in the left and right directions so that the high frequency inside the cavity 10 does not leak to the outside during cooking. As the door 11 is installed, the door 11 of the microwave oven is installed by fitting the door plate 13 to the inner edge of the door frame 12 having a rectangular frame shape as shown in FIG. The groove 14 is formed on the inner edge of the door plate 13, and the fastening piece 16 having the fastening hole 15 is welded to the inner wall of the groove 14, while the groove 14 of the groove 14 is welded. From the opening side is fitted to the fastening piece 16 by inserting a high-frequency shielding material 18 of ferrite rubber material in which the hook piece 17 protrudes from the inner side, and light is transmitted between the upper and lower parts of the door plate 13, Install a door screen (19) that cannot pass through , Is the outer glass 20 is provided between the door frame 12 and the door plate 13, to the inner side of the mounting structure inside the glass 21 of the door screen (19).

However, in the conventional microwave oven structure, there is a problem that the assembly is very poor because of the large number of parts, and because the mold must be manufactured for each part, the cost is increased due to excessive mold cost, which is disadvantageous economically. Due to the increase in the weight of the whole product there was a problem that a lot of weight.

The present invention is to solve the above-mentioned conventional problems, the door plate is fitted to the inner edge of the rectangular frame-shaped door frame, the high frequency shield is fitted to the inner edge of the door plate, the door is installed under the high frequency shielding material In the door of the microwave oven having a screen is installed, the outer and inner glass is provided on the outside and inside of the door, the fastening pieces are welded to the door plate to join the high-frequency barrier material and the high-frequency barrier material. In addition, the door plate is made of the same material as that of the high frequency shielding material, and at the same time, the door screen is formed by insert injection molding so that the high frequency inside the cavity can be more effectively prevented from leaking to the outside during cooking. To reduce the The new type of microwave oven is designed to reduce productivity by reducing the number of parts and assembly, improve productivity by reducing the number of parts and assembly, and significantly reduce the cost by reducing mold cost. The purpose is to provide a door.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 3, the door plate 32 is fitted to the inner edge of the rectangular frame-shaped door frame 30, and the door screen 36 is interposed between the high frequency shielding material 34 and the door. (38) In a door of a microwave oven having an outer glass 40 and an inner glass 42 provided outside and inside, a door plate 32 for engaging the high frequency shield 34 and its high frequency shield 34 The door plate 32 is formed of the same material as that of the high frequency shielding material, and the edge of the door screen 36 is formed inside the inner end of the door plate 32. It has the feature of insert injection molding.

In the present invention, as shown in FIG. 3, the door plate 32 is formed at the outermost edge so as to be in contact with the outer front of the cavity 44 of the microwave oven, and is formed in a bevel shape, and the inside of the door frame ( 30) The support ribs 46 for sandwiching the outer glass 40 fitted inwardly are integrally protruded.

Such action of the present invention is as follows.

As shown in FIG. 3, in the state in which the door 38 is closed, the bent surface formed at the outermost edge of the door plate 32 installed at the inner edge of the door frame 30 is the outer front of the cavity 44 of the microwave oven. As the airtightness is improved by being closely adhered to the part, leakage of high frequency inside the cavity 44 to the outside during cooking is effectively blocked, and the outer glass 40 is supported by the support ribs 46 formed inside the bent surface. It is firmly sandwiched.

When the present invention is applied, the high frequency shielding material, which is conventionally assembled as a separate component, and the fastening piece welded to the door plate to combine the high frequency shielding material are excluded, and instead of the ferrite rubber material of the same material as the high frequency shielding material, the door By installing the plate, the effect of preventing leakage is remarkably improved, the number of parts is reduced, and the insert injection molding of the edge of the door screen on the door plate eliminates screw fastening or welding work, which improves assembly and workability. This increases, since the mold required for fabricating the high-frequency barrier material and its fasteners is excluded, the mold cost is reduced and economically advantageous.

Claims (2)

The door plate 32 is fitted to the inner edge of the rectangular frame-shaped door frame 30, the high frequency shielding material 34 is fitted to the inner edge of the door plate 32, the door between the high frequency blocking material 34 In the door of the microwave oven in which the screen 36 is provided with the outer glass 40 and the inner glass 42 inside and outside the door 38, the high frequency shield 34 and the high frequency shield 34 Excluding the fastening pieces welded to the door plate 32 for coupling, the door plate 32 is formed of the same material as that of the high frequency shielding material, and the edge of the door screen 36 is formed at the door plate ( 32) The door of the microwave oven, characterized in that the insert injection molding inside the inner end. According to claim 1, The door plate 32 is bent in the U-shape to be in contact with the outer front surface of the cavity 44 of the microwave oven on the outermost edge, the inner side of the outer glass that is fitted into the door frame 30 ( 40. A door of a microwave oven, characterized in that the support ribs 46 for sandwiching the body are integrally formed.