JPH11305676A - Electromagnetic shielding filter grounding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic shielding filter grounding device hardly leaking magnetic waves, high in electromagnetic shielding performance, easy to assemble and capable of being easily attached and detached. SOLUTION: This grounding device grounds an electromagnetic shielding filter 5 covering the front face of a display equipment such as PDP(Plasma Display Panel) and provided with an integral formed conductive mesh 13 having a magnetic shielding effect, and a housing having electromagnetic shielding effect and housing a display equipment. While the conductive mesh 13 is provided with an extension part 6 extending from an outer peripheral end part of the electromagnetic shielding filter 5 and a metal electrode plate 7 is fixed to the tip of this extension part 6 with a conductive adhesive, etc., the fixed part 8 for fixing the metal electrode plate 7 to the housing in an electrically conductive state is arranged in the position where the extension part 6 of the housing is not fully extended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a grounding device of an electromagnetic shielding filter for covering a front surface of a display device such as a PDP.

[0002]

2. Description of the Related Art Conventionally, as a method of grounding an electromagnetic shielding filter integrally covering a front surface of a display device and integrally forming a conductive mesh having an electromagnetic shielding effect to a storage case or the like having an electromagnetic shielding effect for accommodating the display device. As shown in JP-A-60-251786, a ground terminal that penetrates the electromagnetic shielding filter and is in contact with the conductive mesh is provided at a corner of an electromagnetic shielding filter integrally formed with a conductive mesh. A method has been used in which a ground wire attached to the ground terminal is grounded to a storage case or the like.

[0003]

However, in the above configuration, the continuity between the electromagnetic shielding filter and the storage case is limited.
Since it is limited to a very small part of the grounding electric wire, there is a problem that the electromagnetic wave easily leaks from between the electromagnetic shielding filter and the storage case, and the electromagnetic shielding performance cannot be enhanced. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a grounding device for an electromagnetic shielding filter which is hard to leak electromagnetic waves, has high electromagnetic shielding performance, is easy to assemble, and is easily detachable.

[0004]

According to the present invention, there is provided an electromagnetic shielding filter which covers a front surface of a display device such as a PDP (plasma display panel) and integrally forms a conductive mesh having an electromagnetic shielding effect. A grounding device for an electromagnetic shielding filter for grounding a storage case having an electromagnetic shielding effect for accommodating the display device, wherein the conductive mesh is provided with an extending portion extending from an outer peripheral end of the electromagnetic shielding filter; A fixing portion for fixing the metal electrode plate to the tip of the extension portion with a conductive adhesive or the like, while fixing the metal electrode plate in an electrically conductive state to the storage case,
The storage case is provided at a position where the extension portion cannot be extended.

[0005] Further, an electromagnetic shielding filter that covers the front surface of a display device such as a PDP (plasma display panel) and integrally forms a conductive mesh having an electromagnetic shielding effect;
In a grounding device for an electromagnetic shielding filter that grounds a storage case having an electromagnetic shielding effect for storing the display device,
The conductive mesh is provided with an extending portion extending from the outer peripheral end of the electromagnetic shielding filter, and at the tip of the extending portion, an exposed electrode at one end of a flexible cable having exposed electrodes at both ends is electrically conductive adhesive or the like. And a fixing portion for fixing the exposed electrode at the other end of the flexible cable in a state of being electrically connected to the storage case at a position where the flexible cable cannot extend.

In addition, the conductive mesh is formed by weaving a metal-plated synthetic resin filler in a net shape, and the extended portion of the conductive mesh is impregnated with a flexible synthetic resin material such as vinyl chloride. .

[0007] Further, the extended portion of the conductive mesh and the fixing portion are provided on a plurality of sides on the outer periphery of the electromagnetic shielding filter.

Further, the fixing portion is constituted by a thin plate spring having one end fixed to the storage case by a screw or the like so that one end is pressed against the storage case. In this configuration, the metal electrode plate or the exposed electrode is inserted so as to be fixed in an electrically conductive state.

Further, a tapered portion extending toward the opening is provided at the pressing end of the thin plate spring.

Further, the thin plate spring is made of a highly conductive metal plate such as phosphor bronze.

[0011] Further, the fixing portion is constituted by a holding plate having both ends fixed to the storage case with screws or the like, and the metal electrode plate or the exposed electrode is sandwiched between the holding plate and the storage case. It is configured to be fixed in a state of electrical conduction.

Further, the pressing plate is made of a conductive metal plate.

Further, the fixing portion is constituted by a connector for connecting the exposed electrode of the flexible cable, and the terminal of the connector is fixed to the housing case by a conductive adhesive or the like so as to be electrically connected to the housing case. Has become.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the embodiments of the present invention shown in FIGS. As shown in the overall configuration diagram of the PDP display device in FIG.
DP (Plasma Display Panel), 2 is PDP1
The rear case 3 made of a sheet metal such as a thin steel plate and the like is fixed with screws 4 to the four outer sides of the rear case 2 and an electromagnetic shielding property is imparted to the inner surface by applying a conductive paint or the like.
The back case 2 and the front panel 3 constitute a storage case of a PDP display device with a front panel formed of a synthetic resin such as (acrylonitrile butadiene styrene). Reference numeral 5 denotes an electromagnetic shielding filter having an electromagnetic shielding property by having a conductive mesh described later. Reference numeral 6 denotes an extending portion of the electromagnetic shielding filter 5 extending from the outer peripheral end face of the electromagnetic shielding filter. 2, the electromagnetic shielding filter 5 is provided on a total of three sides, that is, an upper side and left and right sides, of the four outer sides of the electromagnetic shielding filter 5, and a metal electrode plate 7
Are adhered by a conductive adhesive. Reference numeral 8 denotes a fixing portion for fixing the metal electrode plate 7 to the front panel 3 in an electrically conductive state, and is provided on three sides. Reference numeral 9 denotes a lower end holding bracket that holds the lower end of the electromagnetic shielding filter 5 and is fixed to the front panel 3 with screws 10 and holds the upper end of the electromagnetic shielding filter 5. It is an upper end holding bracket fixedly held to the panel 3.

Next, the present invention will be described in detail with the above overall configuration. First, a description will be given of a first embodiment shown in a sectional view of a main part of FIG. The electromagnetic shielding filter 5 is formed by laminating and fixing a transparent synthetic resin 14 such as acrylic to both surfaces of a conductive mesh 13 made by weaving a synthetic resin filler obtained by plating a copper or nickel on the surface of a polyester fiber in a net shape. In order to make it difficult for the metal plating of the conductive mesh 13 to peel off when the extension 6 of the conductive mesh 13 is bent, a flexible synthetic resin material such as vinyl chloride is used for the extension 6. Impregnation coating. As the fixing portion 8 for fixing the metal electrode plate 7 to the front panel 3 in an electrically conductive state, a conductive material such as phosphor bronze having the other end fixed with a screw 17 so as to press one end against the front panel 3 A thin plate spring 15 made of a metal plate having high flexibility is provided, and a tapered portion 16 extending toward the opening side is provided at a pressing end of the thin plate spring 15, and the metal electrode plate 7 guides the tapered portion 16. And is inserted between the thin plate spring 15 and the front panel 3 and is pressed and fixed to the front panel 3 by the thin plate spring 15. The metal electrode plate 7 is
A high electromagnetic shielding effect can be obtained by the electromagnetic shielding filter 5 and the front panel 3 by pressing the thin plate spring 15 having high conductivity or the front panel 3 coated with conductive paint in a planar manner and conducting. . Further, since the extending portion 6 and the fixing portion 8 are provided on three sides of the outer periphery of the electromagnetic shielding filter 5, a higher electromagnetic shielding effect can be obtained. The thin plate spring 15 is provided at a position where the extension portion 6 can be attached in a state where there is a margin without extending when the metal electrode plate 7 is fixed. Even if it expands and contracts due to thermal expansion and contraction, no load is applied to the extending portion 6,
It is possible to prevent the extension 6 from being cut or the metal electrode plate 7 from coming off. In order to be grounded at the time of assembling, it is only necessary to insert the metal electrode plate 7 between the thin plate spring 15 and the front panel 3, and to remove it at the time of disassembly, simply pull it out. It can be done easily.

Next, a description will be given of a second embodiment shown in a sectional view of a main part viewed from above in FIG. This embodiment differs from the first embodiment in the configuration of the fixing portion 8 for fixing the metal electrode plate 7 to the front panel 3 in an electrically conductive state, and only different portions will be described. Reference numeral 18 denotes a pressing plate for pressing the metal electrode plate 7 against the front panel 3. The pressing plate 18 is made of conductive stainless steel or the like, and has screws 19 at both ends.
Since the metal electrode plate 7 is pressed against the front panel 3 by the tightening force of the screw 19, a large pressing force can be applied, and high conductivity can be obtained. The metal electrode plate 7 is made of the conductive holding plate 18 or the front panel 3 coated with a conductive paint.
As a result, a high electromagnetic shielding effect can be obtained between the electromagnetic shielding filter 5 and the front panel 3.

Next, a description will be given of a third embodiment shown in the sectional view of the main part of FIG. Reference numeral 20 denotes a flexible cable having exposed electrodes 21 at both ends.
Is adhered to the tip of the extending portion 6 of the conductive mesh 13 with a conductive adhesive. A connector 22 connects the exposed electrodes 21 of the flexible cable 20 to terminals 23 of the connector 22 using a conductive adhesive.
By connecting the exposed electrode 21 at one end of the flexible cable 20 to the connector 22, the conductive mesh 13 and the front panel 3 are electrically connected.
Since the flexible cable 20 and the connector 22 can use commercially available products, there is no need to manage the conductivity at the connection part at the component level, and stable conductivity can be obtained.

[0018]

According to the present invention, an electromagnetic shielding filter that covers the front surface of a display device such as a PDP and integrally forms a conductive mesh having an electromagnetic shielding effect is grounded to a storage case having an electromagnetic shielding effect for accommodating the display device. In the filter grounding device, the conductive mesh is provided with an extending portion extending from the outer peripheral end of the electromagnetic shielding filter, and a metal electrode plate is fixed to a tip of the extending portion with a conductive adhesive or the like, A fixing portion for fixing the metal electrode plate to the storage case in an electrically conductive state is provided at a position where the extending portion of the storage case cannot be extended, and one end of the fixing portion is pressed against the storage case. The other end is constituted by a thin plate spring fixed to the storage case with a screw or the like, and the metal electrode plate is inserted between the pressing end of the thin plate spring and the storage case to electrically conduct. With ground equipment electromagnetic shielding filter comprising fixed state, the metal electrode plate,
By pressing the conductive sheet spring into a planar shape and conducting it, a high electromagnetic shielding effect can be obtained between the electromagnetic shielding filter and the storage case. Only needs to be inserted between the thin plate spring and the storage case, and can be removed at the time of disassembly only by pulling out, so that assembly and detachment can be performed extremely easily. Further, the fixing portion is constituted by a pressing plate having both ends fixed to the storage case with screws or the like, and the metal plate or the exposed electrode is sandwiched between the pressing plate and the storage case so as to be electrically connected. Since the metal electrode plate is pressed against the storage case by the tightening force of the screw by using the grounding device of the electromagnetic shielding filter that is fixed in a fixed state, a large pressing force can be applied, and high conductivity can be obtained. Can be obtained.

Furthermore, the front of a display device such as a PDP is covered,
In a grounding device for an electromagnetic shielding filter in which an electromagnetic shielding filter integrally formed with a conductive mesh having an electromagnetic shielding effect is grounded to a storage case having an electromagnetic shielding effect for accommodating the display device, wherein the conductive mesh is formed of the electromagnetic shielding filter. An extended portion extending from the outer peripheral end portion is provided, and the exposed electrode at one end of a flexible cable having exposed electrodes at both ends is fixed to a tip of the extended portion with a conductive adhesive or the like, while the flexible cable is A fixing portion for fixing the exposed electrode at the other end of the flexible cable in a state of being electrically connected to the storage case at a position where the flexible cable cannot be extended; and a connector for connecting the fixed electrode to the exposed electrode of the flexible cable. And the terminals of the connector are not fixed to the storage case in an electrically conductive state with a conductive adhesive or the like. By using a grounding device for an electromagnetic shielding filter, a commercially available product can be used for the flexible cable and the connector. Therefore, it is not necessary to manage the conductivity at the connection part at the component level, and to obtain stable conductivity. Can be. According to the present invention as described above,
A grounding device for an electromagnetic shielding filter that is less likely to leak electromagnetic waves, has high electromagnetic shielding performance, is easy to assemble, and is easily detachable.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a PDP display device to which a grounding device for an electromagnetic shielding filter according to the present invention is applied.

FIG. 2 is a front view showing an example of an electromagnetic shielding filter according to the present invention.

FIG. 3 is a sectional view of a main part showing a first embodiment of a grounding device for an electromagnetic shielding filter according to the present invention.

FIG. 4 is a cross-sectional view of a main part of a second embodiment of a grounding device for an electromagnetic shielding filter according to the present invention as viewed from above.

FIG. 5 is a sectional view showing a main part of a third embodiment of the grounding device for an electromagnetic shielding filter according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 PDP (plasma display panel) 2 rear case (contains storage case) 3 front panel (contains storage case) 5 electromagnetic shielding filter 6 extension part 7 metal electrode plate 8 fixing part 13 conductive mesh 15 thin plate spring 16 taper part 17 Screw 18 Holding plate 19 Screw 20 Flexible cable 21 Exposed electrode 22 Connector 23 Terminal

Claims (10)

[Claims] 1. PDP (Plasma Display Panel)
In a grounding device for an electromagnetic shielding filter that covers the front surface of a display device such as an electromagnetic shielding filter integrally formed with a conductive mesh having an electromagnetic shielding effect, and a storage case having an electromagnetic shielding effect for accommodating the display device. The conductive mesh is provided with an extending portion extending from the outer peripheral end of the electromagnetic shielding filter, and a metal electrode plate is fixed to a tip of the extending portion with a conductive adhesive or the like, while the metal electrode plate is A grounding device for an electromagnetic shielding filter, wherein a fixing portion fixed to the storage case in an electrically conductive state is provided at a position where the extension portion of the storage case cannot extend. 2. PDP (Plasma Display Panel)
In a grounding device for an electromagnetic shielding filter that covers the front surface of a display device such as an electromagnetic shielding filter integrally formed with a conductive mesh having an electromagnetic shielding effect, and a storage case having an electromagnetic shielding effect for accommodating the display device. The conductive mesh is provided with an extended portion extending from the outer peripheral end of the electromagnetic shielding filter, and at the tip of the extended portion, an exposed electrode at one end of a flexible cable having exposed electrodes at both ends is electrically conductive adhesive. And a fixing portion for fixing the exposed electrode at the other end of the flexible cable in a state where it is electrically connected to the storage case, at a position where the flexible cable cannot extend. Electromagnetic shielding filter grounding device. 3. The conductive mesh is formed by weaving a metal-plated synthetic resin filler in a net shape, and the extended portion of the conductive mesh is impregnated and coated with a flexible synthetic resin material such as vinyl chloride. The grounding device for an electromagnetic shielding filter according to claim 1. 4. The electromagnetic shielding filter according to claim 1, wherein the extending portion of the conductive mesh and the fixing portion are provided on a plurality of sides on the outer periphery of the electromagnetic shielding filter. Grounding device. 5. The fixing portion is constituted by a thin plate spring having one end fixed to the storage case with a screw or the like such that one end is pressed against the storage case, and the pressing end of the thin plate spring and the storage case are connected to each other. The grounding device for an electromagnetic shielding filter according to claim 1, wherein the metal electrode plate or the exposed electrode is inserted between the first electrode and the second electrode to be fixed in an electrically conductive state. 6. A grounding device for an electromagnetic shielding filter according to claim 5, wherein a tapered portion extending toward an opening is provided at a pressing end of said thin plate spring. 7. The grounding device for an electromagnetic shielding filter according to claim 5, wherein the thin plate spring is made of a highly conductive metal plate such as phosphor bronze. 8. The fixing portion is constituted by a holding plate having both ends fixed to the storage case with screws or the like, and the metal electrode plate or the exposed electrode is sandwiched between the holding plate and the storage case to thereby provide electric power. 5. The grounding device for an electromagnetic shielding filter according to claim 1, wherein the grounding device is fixed in a state of electrical conduction. 9. The grounding device for an electromagnetic shielding filter according to claim 8, wherein said holding plate is made of a conductive metal plate. 10. The fixing portion is constituted by a connector for connecting an exposed electrode of the flexible cable, and a terminal of the connector is fixed in a state of being electrically connected to the storage case by a conductive adhesive or the like. The grounding device for an electromagnetic shielding filter according to claim 2, wherein: