JP2000196977A - Shield structure of plasma display device - Google Patents

Abstract

(57) [Problem] To significantly improve a radiation level in an electronic device such as a plasma display device. SOLUTION: A plasma display panel and a metal heat radiating plate 17 are sequentially mounted on an escutcheon 1, a substantially U-shaped metal case 12 is mounted on the metal heat radiating plate 17 in an insulated state, and then printed wiring for a power supply circuit. A metal shield case containing a board or the like is housed inside the metal case 12 in a conductive state, and a metal back cover 2 with a cutout portion covering the split shield case is further removed. The structure attached to the escutcheon 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a measure against line radiation in electronic equipment such as a plasma display device.

[0002]

2. Description of the Related Art Conventionally, an AC inlet, a power supply printed circuit board, and the like, which are affected by line radiation, are housed in a metal back cover as shown in FIG. Was. That is, it has a double shield structure.

[0003]

However, with the above-described structure, it was extremely difficult to keep the line radiation level within the standard.

[0004]

In order to solve the above-mentioned problems, a shield structure of a plasma display device according to the present invention includes a power supply printed wiring board section and an AC inlet section housed in a metallic shield case. It was configured to be mounted outside the back cover of the plasma display device using a metal case.

[0005] With the above configuration, the radiation level can be remarkably improved and kept within the standard.

[0006]

A first aspect of the present invention is to sequentially attach a plasma display panel and a metal heat sink to an escutcheon, attach a substantially U-shaped metal case to the metal heat sink in an insulated state, Next, a metal shield case having a printed circuit board for a power supply circuit housed therein is mounted in a conductive state in the metal case, and further, a metal back cover in which a portion covering the shield case is cut out is connected to the escutcheon. The shield structure of the plasma display device is characterized in that the line radiation level can be significantly improved. Hereinafter, a shield structure of a plasma display device according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is an external perspective view of a plasma display device of the present invention, FIG. 2 is a rear side perspective view of FIG. 1, FIG. 3 is a perspective view of a metal case constituting the present invention, and FIG. FIG. 5 is a perspective view showing a state before the upper lid of the shield case constituting the present invention is attached, FIG. 5 is a cross-sectional view of a main part in a state where the metal case, the shield case, and the back cover of the present invention are assembled.
FIG. 6 is an exploded perspective view of the rear side before assembling the plasma display device of the present invention.

1 to 6, reference numeral 1 denotes an escutcheon, 2 denotes a metal back cover, 3 denotes a power cord,
Is a metal cover of a metal shield case, 5 is a metal shield case, 6 is a nail, 7 is a metal gasket, 8 is AC
Inlet 9 is a noise filter, 10 is a power supply printed wiring board, 11 is a mounting ear of a shield case, 12 is a substantially U-shaped metal case, 13 is a square hole formed in the bottom plate of the metal case, 14, 15, and 16 Denotes a mounting screw, and 17 denotes a metal radiator plate.

In FIG. 3, when the metal case 12 is joined to the metal back cover 2, a metal gasket 7 is attached to the upper end of the bottom plate in order to make the same electric potential. In FIG. 6, a split shield case,
That is, the upper cover 4 made of a metal shield case and the metal shield case 5 are attached to the metal case 12 by the mounting screws 14. Further, the metal case 12 is mounted on the metal back cover 2 by mounting screws 15. The metal back cover 2 has a shape in which the upper lid 4 and the shield case 5 are cut out, and is attached to the escalation 1 with the attachment screws 16. The conduction between the metal case 12 and the metal back cover 2 is performed through the conductive gasket 7.

As shown in FIGS. 2 and 5, the upper cover 4 having the power supply printed wiring board 10 and the AC inlet section 8 housed therein and the shield case 5 are mounted outside the back cover 2. Has become.

FIG. 4 shows the inside of the shield case. A
A C inlet 8, a noise filter 9, a power supply printed circuit board 10, and the like are housed therein. The shield case 5 is provided with shield case mounting ears 11 and claws 6. As shown in FIG. 5, the shield case 5 is mounted on the metal case 12 by mounting screws 14 and claws 6. I have. The claw 6 fits into a square hole 13 (see FIG. 3) formed in the bottom plate of the metal case 12.

In FIG. 6, a plasma display panel (not shown) and a metal heat radiating plate 17 are sequentially mounted on the escutcheon 1, and a substantially U-shaped metal case 12 is mounted on the metal heat radiating plate 17 in an insulated state. Next, a metal shield case, in which a printed circuit board for a power supply circuit or the like is housed, is mounted in the metal case 12 in a conductive state, and a portion covering the shield case is further provided. The procedure for attaching the metal back cover 2 notched to the escutcheon 1 will be described.

[0013]

According to the present invention, the power supply printed circuit board and the A
The structure is such that the split shield case containing the C inlet portion is attached to the outside of the metal back cover, and the radiation level with respect to line radiation is greatly reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a plasma display device of the present invention.

FIG. 2 is a rear perspective view of FIG. 1;

FIG. 3 is a perspective view of a metal case constituting the present invention.

FIG. 4 is a perspective view showing a state before an upper cover of a shield case constituting the present invention is attached.

FIG. 5 is a cross-sectional view of a main part in a state where the metal case, the shield case, and the back cover of the present invention are assembled.

FIG. 6 is a rear perspective view of the plasma display device of the present invention before assembly.

FIG. 7 is a rear perspective view of a conventional plasma display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Escussion 2 Back cover 3 Power cord 4 Top lid 5 Shield case 6 Claw 7 Gasket 8 AC inlet 9 Noise filter 10 Power supply printed wiring board 11 Mounting ear 12 Metal case 13 Square hole 14, 15, 16 Mounting screw 17 Heat sink

Claims (2)

[Claims] 1. A plasma display panel and a metal radiator plate are sequentially mounted on an escutcheon, a substantially U-shaped metal case is mounted on the metal radiator plate in an insulated state, and then a printed circuit board for a power supply circuit is mounted inside. A plasma display device comprising: a metal shield case housed in a metal case; and a metal back cover in which a portion covering the shield case is cut off is attached to the escutcheon. Shield structure. 2. The shield structure for a plasma display device according to claim 1, wherein conduction between the metal case and the metal back cover is performed via a conductive gasket.