KR20060094635A - A plasma display device - Google Patents

Abstract

The present invention relates to a plasma display device for improving the fastening strength of a boss press-fitted to the chassis base in order to install a circuit board assembly on the chassis base. The present invention relates to a plasma display panel and a chassis to which the plasma display panel is attached and supported. A base, a boss provided on the opposite side of the chassis base of the plasma display panel, and a circuit board assembly installed on the boss, wherein the boss has an inner side surface of the press-in groove in which a portion thereof is introduced by pressing the chassis base. The present invention provides a plasma display apparatus having a surface corresponding to a pressing direction in a pressing direction and an inflow direction of a chassis base.

Boss, Chassis Base, Tightening Strength, Breakaway Resistance, Press-In

Description

Plasma Display Device {A PLASMA DISPLAY DEVICE}

1 is an exploded perspective view of a plasma display device according to the present invention.

2 is a partial perspective view of an essential part of the plasma display device according to the present invention.

3 is a cross-sectional view according to a first embodiment of the present invention taken along the line A-A of FIG.

4A to 4C are cross-sectional views illustrating a press-fit process of the boss according to the first embodiment of the present invention.

5 is a simulation analysis diagram of the indentation result of the boss to be applied to the present invention.

6 is a cross-sectional view according to a second embodiment of the present invention taken along the line A-A of FIG.

7 is a cross-sectional view according to a third embodiment of the present invention taken along the line A-A of FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device for improving a fastening strength of a boss press-fitted to a chassis base in order to install a circuit board assembly on a chassis base.

As is well known, a plasma display panel (PDP) is a display panel that realizes an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge in a discharge cell, and is excellent in display capacity, brightness, contrast, viewing angle, and the like. Has performance.

Plasma display device using the same is the plasma display panel for realizing the image, the chassis base for supporting the plasma display panel, the circuit board assemblies are installed on the chassis base on the opposite side of the plasma display panel, the plasma display panel, chassis base and circuit board It is composed of a case surrounding the assembly and forming the appearance of the plasma display device.

The case consists of a front cover positioned in front of the plasma display panel and a rear cover positioned behind the plasma display panel. Here, the front cover and the rear cover generally form a coupling structure that can be disassembled and coupled with each other.

Circuit board assemblies mounted to the chassis base include a power supply board assembly, an image processing board assembly, a logic board assembly, an address buffer board assembly, a sustain electrode drive board assembly, a scan electrode drive board assembly, and the like. A circuit board assembly (PBA) is a component and device mounted on a printed circuit board according to a design drawing.

The circuit board assemblies are fastened and fixed to a boss provided in the chassis base corresponding to each other, and are electrically connected to the plasma display panel by a flexible printed circuit (FPC) to drive the plasma display panel.

Here, the boss has a circular cross section and is formed along a circumferential direction between a fastening portion to which a set screw is fastened, a press-fitting portion integrally formed at the rear end of the fastening portion, and pressed into the chassis base, and between the fastening portion and the press-fitting portion. And a portion of the press-fitted groove portion is pushed in by the press of the chassis base.

Such a boss is press-fitted from the front side to the rear side of the chassis base to which the plasma display panel is attached to each installation hole formed in the chassis base corresponding to the fastening position of the circuit board assembly.

That is, the boss is penetrated through the mounting hole of the chassis base, and presses it through the press-in part corresponding to the front surface of the chassis base, and the chassis base pressed by the press-in part is deformed to a high density inside. The inlet is formed by being pushed into the press-in groove of the boss to fix the boss to the chassis base.

However, in recent years, as a purpose of reducing the weight of the plasma display device, the thickness of the chassis base is tended to be thin, and thus, the tightening strength of the boss press-fitted to the chassis base is also weakened.

In particular, the inner side surface of the boss press-in groove is formed in parallel with the center line of the boss so that the inlet by the press of the chassis base is not completely in contact with the press-in groove, and the inlet by the press-in of the inner side of the press-in groove and the chassis base. The space part is formed in between. Accordingly, the conventional press-fit fastening structure of the boss to the chassis base can maintain a certain level of fastening strength in the pull-out test in the push-in direction, but in the opposite direction of the push-in, the formation of the corresponding leaving resistance surface is stable. There is a problem that does not have the required fastening strength.

Therefore, the present invention has been invented to solve the above problems, the object of the present invention is to provide a plasma display device that can improve the fastening strength of the boss press-fitted to the chassis base in order to install the circuit board assembly in the chassis base To provide.

The plasma display apparatus according to the present invention includes a plasma display panel, a chassis base to which the plasma display panel is attached and supported, a boss provided on the opposite side of the chassis display panel, and a circuit board assembly installed on the boss. The boss forms an inner side surface of the press-fitting groove in which a portion thereof is introduced by pressing the chassis base into a surface corresponding to the joint direction of the press-in direction of the boss and the inflow direction of the chassis base.

That is, the boss is formed along the circumferential direction of the fastening portion between the fastening portion having a circular cross section, the press-in portion formed integrally at the rear end of the fastening portion, the fastening portion and the press-in portion, the inner side of the boss It consists of a press-in groove which is formed in the inclined surface which opposes the direction of force of the press-in direction and the inflow direction of the chassis base.

The inclined surface may be formed as a predetermined inclined surface over the entire inner side surface of the press-in groove, or only a portion of the inner side of the press-in groove may be formed as a predetermined inclined surface.

In addition, the boss is formed in the circumferential direction of the fastening portion having a circular cross section, the press-in portion integrally formed at the rear end of the fastening portion, the fastening portion and the press-in portion, the inner side of the boss It may also be made of a pressing groove formed in a round surface facing the direction of the joint of the pressing direction and the inflow direction of the chassis base.

At this time, the release resistance surface is formed in a concave round shape, it is preferable that the inner end of the press-in groove portion from the outer end of the fastening portion of the boss is formed to the point where the press-in portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is an exploded perspective view of a plasma display device according to the present invention, Figure 2 is a partial perspective view of the main part of the plasma display device according to the present invention.

Referring to the drawings, a plasma display apparatus will be described in detail. In the plasma display apparatus according to the present invention, a plasma display panel 3 substantially embodying an image, and one surface of the plasma display panel 3, that is, an image is embodied. And a chassis base 5 disposed on the opposite side of the plasma display panel 3 and coupled to the plasma display panel 3, and having a front cover (not shown) and a rear surface of the chassis base 5 disposed on the front side of the plasma display panel 3. It further includes a rear cover (not shown) disposed to the side.

Here, a heat dissipation sheet 7 for transferring heat generated from the plasma display panel 3 to the chassis base 5 is disposed between the plasma display panel 3 and the chassis base 5, and the front cover includes a plasma display panel ( A filter (not shown) for shielding electromagnetic waves emitted from 3) is mounted.

In the above, the plasma display panel 3 is generally formed in the shape of a rectangle (a rectangle in which the length of the x-axis direction is longer than the length of the y-axis direction in the drawing), and the chassis base 5 has the shape of the plasma display panel 3. It may be formed of a material such as aluminum (Al) having a shape corresponding to and excellent in thermal conductivity.

The plasma display panel 3 is attached to one side of the chassis base 5, and a plurality of circuit board assemblies 9 required for driving the plasma display panel 3 are mounted on the opposite side thereof. This circuit board assembly 9 is mounted to a boss 13 that projects substantially to the rear of the chassis base 5 by a set screw 11.

The circuit board assembly 9 mounted on the rear side of the chassis base 5 may include a sustain electrode driving board assembly 9a, a scan electrode driving board assembly 9b, and a switching mode power supply board assembly. 9c), image processing board assembly 9d, and address buffer board assembly 9e.

The circuit board assemblies 9 are fastened and fixed by a set screw 11 to the boss 13 provided in the chassis base 5 corresponding to each of them, and are connected to the plasma display panel by a flexible printed circuit (FPC). Electrically connected with (3), this plasma display panel 3 is driven.

Here, reference numeral 17 refers to a fastener on the circuit board assembly.

Figure 3 is a cross-sectional view according to a first embodiment of the present invention along the line AA of Figure 1, Figure 4a to Figure 4c is a cross-sectional view showing a press-fit process of the boss according to the first embodiment of the present invention, Figure 5 Is a simulation analysis diagram of the indentation result of the boss applied to this invention.

With reference to these drawings, the simulation of the structure of the boss according to the first embodiment of the present invention, its fastening process and the result of the indentation will be analyzed.

The boss 13 according to the first embodiment of the present invention is basically divided into a fastening portion B1, a press-fitting portion B2, and a press-fitting groove portion B3 as shown in FIG.

First, the fastening part B1 has a circular cross section and is formed in a predetermined length and is formed as a part to which the circuit board assembly 9 is fastened through the set screw 11.

The press-in portion B2 is integrally formed at the rear end of the fastening portion B1, and the press-in portion B2 is formed in a circular plate shape and thinner than the thickness of the chassis base 5 so as to form the chassis base 5. It consists of a part to be press-fitted. Here, the thickness t1 of the press-in portion B2 is preferably 1/3 or less than the thickness t2 of the chassis base 5 (please refer to the inventor's draft.) Do.

A press-fit groove portion B3 is formed between the press-fit portion B2 and the fastening portion B1 along the circumferential direction of the fastening portion B1, and the press-fit groove portion B2 has the chassis base 5 at the press-fit portion. By pressing (B2) at a high density, a portion of the material is introduced to form an inlet part P, thereby serving to fix the boss 13 to the chassis base 5. Here, the width w of the press-in groove portion B3 is preferably 1/2 or less (a ratio arbitrarily set in comparison with the thickness t2 of the chassis base 5. Please check the inventor's draft). Do.

And the inner side (SF) of the press-in groove (B3) is formed of the inclined surface (C1) toward the joint direction of the boss 13 and the inflow direction of the chassis base (5) in the inflow direction (→ zy direction in the drawing) The inclined surface C1 is fixed with respect to the center line SL of the boss 13 so as to face the joint direction (→ zy direction in the drawing) of the press-in direction of the boss 13 and the inflow direction of the chassis base 5. It is formed to be inclined at the inclination angle α.

That is, in the first embodiment of the present invention, the inclined surface C1 exemplifies that the entire inner side surface SF of the indentation groove B3 is formed to have a predetermined inclined surface.

Here, the inclination angle α of the inclined surface C1 is arbitrarily set with respect to the center line SL of the boss 13, and preferably, a part of the inclined surface C1 flows into the indentation groove B3 by pressing the chassis base 5. It is important that the inlet portion P is set to most similarly resemble the shape of the inlet portion P.

2, the process of pressing and fastening the boss 13 according to the first embodiment of the present invention to the chassis base 5 will be described with reference to FIGS. 4A, 4B, and 4C.

First, as shown in FIG. 4A, the plasma base panel 3 to which the plasma display panel 3 is attached to each mounting hole 15 formed in the chassis base 5 corresponding to the fastening position of each circuit board assembly 9 is formed. Insert the fastening portion (B1) of the boss 13 from the front (FF) to the rear (RF) side.

Next, as shown in FIG. 4B, the fastening portion B1 of the boss 13 penetrates through the fitting opening 15 of the chassis base 5, corresponding to the front surface FF of the chassis base 5. To press through the press-in portion B2. At this time, the chassis base 5 that is pressed by the press-fitting part B2 starts to be pushed into the press-indenting part B3 of the boss 13 by a portion of the material deformed with high density therein.

As such, when the press-fitting portion B2 of the boss 13 is completely press-fitted into the chassis base 5, as shown in FIG. 4C, a part of the material that is deformed with high density inside the chassis base 5 is the boss. It fully pushes into the press-in groove B3 of (13), and forms the inflow part P. FIG.

At this time, the inlet portion P inside the chassis base 5 has a large density of deformation at a portion adjacent to the indentation portion B2 of the boss 13 as in the simulation of the indentation result shown in FIG. 5. As the distance from the press-in portion B2 of the boss 13 increases, the deformation is smaller, and the space is not formed along the inclined surface C1 formed in the inner side SF of the press-in groove B3. The boss 13 is firmly fixed to the chassis base 5 while completely compressed.

Accordingly, the boss 13 according to the first embodiment is fastened to the chassis base 5 even when the thickness t2 of the chassis base 5 is made thin to about 1 mm to reduce the weight of the plasma display device. The strength can be maintained and, in particular, further strengthening the fastening strength in the opposite direction of the indentation (in the drawing -z axis direction).

6 is a cross-sectional view according to a second embodiment of the present invention taken along the line A-A of FIG.

The structure of the boss according to the second embodiment of the present invention will be described with reference to these drawings.

The boss 13 according to the second embodiment of the present invention is basically divided into a fastening part B1, a press-fitting part B2, and a press-fitting groove part B3 as in FIG. 6. Same as the embodiment.

In addition, the inclined surface C2 in which the inner side SF of the press-in groove B3 faces the joint direction of the boss 13 and the inflow direction of the chassis base 5 (→ zy direction in the drawing) A configuration in which the boss 13 is inclined at a predetermined inclination angle α with respect to the center line SL is also the same as the first embodiment of the present invention, but the boss 13 according to the second embodiment has the inclined surface C2. ) Is formed only in the upper portion, not the entire inner side (SF) of the indentation groove (B3).

Here, the inclination angle α of the inclined surface C2 according to the second embodiment of the present embodiment is arbitrarily set. Preferably, the inlet part of which a portion of the inclined surface C2 flows into the indentation groove B3 by the pressing of the chassis base 5 is provided. It is important to resemble the shape of (P).

Such a simulation analysis of the fastening process of the boss 13 according to the second embodiment of the present invention and the result of the indentation appears similarly to the first embodiment of the present invention, and a detailed description thereof will be omitted.

7 is a cross-sectional view according to a third embodiment of the present invention taken along the line A-A of FIG.

The structure of the boss according to the third embodiment of the present invention will be described with reference to these drawings.

The boss 13 according to the third embodiment of the present invention is basically divided into the fastening part B1, the press-fitting part B2, and the press-fitting groove part B3, as shown in FIG. 7. Same as the embodiment.

On the other hand, the inner side SF of the press-in groove B3 is opposed to the joint direction of the press-in direction of the boss 13 and the inflow direction of the chassis base 5 (→ zy direction in the drawing). There is a difference in that it is formed along the outer shape of the inflow portion P introduced by the compression of 5).

That is, the boss 13 according to the third embodiment of the present invention has a concave round so that an inner side thereof corresponds to the outer shape of the inflow portion P introduced into the indentation groove B3 by pressing the chassis base 5. It is formed with the surface C3.

That is, the round surface C3 has a round shape from the lower end P1 of the fastening part B1 of the boss 13 to the point P2 where the inner end of the press-in groove B3 meets the press-in part B2. It is characterized in that it is formed to have a shape most similar to the inlet (P) to maximize the compression area.

Such a simulation analysis of the fastening process by the press-in of the boss according to the third embodiment of the present invention and the result of the press-in can be inferred to exhibit a similar or more improved effect than the first embodiment of the present invention, and the detailed description thereof Is omitted.

Although three preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Of course, this also belongs to the scope of the present invention.

As described above, according to the plasma display device of the present invention, the inner side surface formed in the press-in groove of the boss press-fitted to the chassis base to install the circuit board assembly in the chassis base has a force of the boss press-in direction and the inflow direction of the chassis base. Formed with a surface facing the direction has the effect of further improving the fastening strength of the boss to the chassis base.

Claims (7)

Plasma display panel, A chassis base for attaching and supporting the plasma display panel; A boss provided on an opposite side of the chassis base of the plasma display panel; A circuit board assembly installed on the boss, And the boss forms an inner side surface of a press-in groove in which a portion of the boss is introduced by pressing the chassis base into a surface corresponding to a joint direction in the press-in direction of the boss and the inflow direction of the chassis base. The method of claim 1, The boss is Fastening part having a circular cross section, An indentation part integrally formed at the rear end of the fastening part; A plasma display device formed between the fastening portion and the press-fitting portion along a circumferential direction of the fastening portion, and having an inner side surface formed with an inclined surface opposite to the joint direction of the boss-pressing direction and the chassis base inflow direction; . The method of claim 2, The inclined surface And a plasma display device formed over the entire inner side surface of the press-in groove. The method of claim 2, The inclined surface And a plasma display device formed on a portion of an inner side surface of the press-in groove. The method of claim 1, The boss is Fastening part having a circular cross section, An indentation part integrally formed at the rear end of the fastening part; A plasma display formed between the fastening portion and the press-fitting portion along a circumferential direction of the fastening portion, and having an inner side thereof formed with a round surface facing the joint direction of the press-in direction of the boss and the inflow direction of the chassis base; Device. The method of claim 5, wherein The round face And a point where an inner end of the press-in groove portion meets the press-in portion from an outer lower end of the fastening portion of the boss. The method of claim 1, And an inner side surface of the press-groove portion along an outer shape of the press-fit portion of the chassis base.

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