KR20020071991A - Inner shield mounting structure of Flat CRT - Google Patents

Abstract

PURPOSE: An inner shield mounting structure for flat CRT is provided to simplify inner shield mounting procedures and prevent damage of inner shield during disassembly of CRT. CONSTITUTION: An inner shield mounting structure comprises a connecting unit for connecting an inner shield(20) to a rail(18) in such a manner that the inner shield is separatable from the rail. The connecting unit includes a bent type spring(30) attached to the rail, and which has a connecting slot(30a); a coupling piece(22) arranged at an edge of the inner shield, and which has a through hole(22a) for penetration of the spring; and a connecting piece(32) inserted into the connecting slot of the spring, at the state where the spring has penetrated through the through hole formed at the coupling piece, so as to prevent escape of the spring. The connecting piece is formed into a band type which is folded and inserted into the connecting slot formed at the spring and elastically extended.

Description

Inner shield mounting structure of Flat CRT

The present invention relates to a CRT, and more particularly, to an inner shield mounting structure of a flat CRT.

In general, the planar CRT is mounted in the funnel 10 and the flat screen panel 12 and the funnel 10, which are fused to the funnel 10 and provided with a fluorescent film on the inner surface thereof. And a deflection yoke (not shown) for deflecting the electron beam emitted from the electron gun 14 and the electron gun 14 for emitting the electron beam toward the fluorescent film.

The inner surface of the screen panel 12 is provided with a shadow mask 16 to color the emitted electron beam to the fluorescent film, the shadow mask 16 is a plurality of micro-slot-shaped electron through hole (16a) The formed thin film is mounted in a structure supported by the rail 18 attached to the screen panel 12. Here, the rail 18 is attached by an adhesive method by frit glass.

In addition, the CRT is provided with an inner shield 20 for preventing the color purity from being lowered by deflecting the electron beam by an external magnetic field such as a geomagnetic field. The inner shield 20 has a flat plate shape having a funnel shape. As the metal structure, it is mounted in such a manner that the front part is welded to the rail 18 as shown in FIG.

According to the CRT, power is applied to the cathode of the electron gun 14 to generate an electron beam, and the generated electron beam is accelerated and focused while passing through the accelerating electrode and the focusing electrode, and then the shadow mask 16 is deflected by the deflection coil. By passing through and colliding with the fluorescent film, the fluorescent material of the fluorescent film is emitted to realize an image.

On the other hand, in the manufacturing process of the flat CRT, the product productivity is increased by disassembling each component of the product determined as defective in the final performance test step and selecting and recycling the recyclable parts, which are conventionally the funnel 10 and the screen. Only the panel 12 is recycled and the remaining parts are disposed of.

In the case of the rail 18, this is fused by the screen panel 12 and the frit glass, the shadow mask 16 and the inner shield 20 are welded to the rail 18, and the electron gun 14 is the funnel 10. This is because the parts constituting the CRT are fixedly attached to each other, such as being enclosed in the neck portion 101 of the neck 101, so that they are deformed or damaged in the process of separating the parts.

In particular, in the case of the inner shield 20, because the structural (thin metal structure) durability is weak, it can be seen that it is almost impossible to recycle because of a slight impact.

Therefore, according to the conventional inner shield mounting structure, since the inner shield 20 cannot be recycled, a problem arises that the productivity of the CRT decreases.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a mounting structure that helps to improve the productivity of the CRT by preventing the inner shield from being broken when the CRT is disassembled.

1 is an exploded perspective view showing the structure of a general flat CRT.

2 is a plan view showing the shape of the inner shield applied to the embodiment of the present invention.

Figure 3 is an exploded perspective view showing the mounting structure of the inner shield applied to the embodiment of the present invention.

4 is a plan view illustrating a state in which an inner shield is mounted according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: funnel 12: screen panel

14: electron gun 16: shadow mask

18: Rail 20: Inner Shield

22: engaging piece 22a: through hole

30: fixed spring 30a: binding slot

32: binding pin

The inner shield mounting structure of the flat CRT provided to achieve the above object includes a binding means for detachably binding the inner shield to the rail, the binding means being attached to the rail and having a binding slot formed with a binding slot. And a coupling piece having a fixed spring and a through hole through which the fixed spring penetrates, and a fixed spring inserted into the binding slot in a state where the fixed spring penetrates the through hole. It consists of a binding pin.

Here, the binding pin is inserted into the binding slot of the fixed spring is made of a band form that is elastically expanded.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 4, and the same reference numerals will be given to the same parts as those in the prior art, and the description thereof will be omitted.

First, the inner shield mounting structure of the flat CRT applied to an embodiment of the present invention includes a binding means for detachably binding the inner shield to the rail, and the binding means includes an inner shield as shown in FIG. Coupling piece 22 provided at the edge of 20, the fixed spring 30 of the bending piece form attached to the rail 18, the binding slot 30a is formed as shown in Figure 3, and the fixed spring 30 The binding pin 32 is inserted into the binding slot 30a in a state of penetrating the through hole 22a of the coupling piece 22 to prevent the fixing spring 30 from being separated.

Here, the fixed spring (30) is attached to the rail 18, both ends are attached to the rail 18, the middle portion formed by the binding slot (30a) is bent and projected in pairs to the long side or short side of the rail 18. do.

The rail 18 has a structure in which the upper surface width is greater than or equal to a predetermined value so that the joint area with the fixed spring 30 is sufficiently secured to maintain stable welding strength.

And, the binding pin 32 is bent over the center portion is folded in half and both ends are bent inward to form a band form elastically expandable.

According to the inner shield mounting structure of the flat CRT according to the embodiment of the present invention as described above, after the fixing spring 30 is welded to the rail 18, the center end of the fixing spring 30 is coupled to the coupling piece 22. The inner shield 20 is seated so as to protrude through the through hole 22a of the), and then the inner shield 20 is mounted by inserting the binding pin 32 into the binding slot 30a of the fixed spring 30. Done.

Here, the operator is forcibly inserted into the binding slot (30a) of the fixed spring 30 in the state in which both sides of the binding pin 32, the elastic force in the state that the binding pin 32 is inserted into the binding slot (30a). Because of the expansion to some extent by the bending structure in the binding slot (30a) does not fall out, the mounting state of the inner shield 20 is maintained firmly (see Fig. 4).

Then, the binding pin 32 is withdrawn from the through-hole 22a of the coupling piece 22 to release the binding state between the inner shield 20 and the rail 18, and then the coupling piece 22 is fixed to the spring 30. The inner shield 20 is separated from the rail 18 in such a way as to detach from the rail 18.

Therefore, according to the embodiment of the present invention, the inner shield 20 is mounted through a relatively simple process, such as welding the fixed spring 30 and fitting the coupling piece 22 to the fixed spring 30, resulting in final performance. When disassembling the CRT determined in the test step, the inner shield 20 can be separated and recycled without damage.

As described above, the inner shield mounting structure of the flat CRT according to the present invention simplifies the work process when the inner shield is mounted and prevents damage to the inner shield when dismantling the CRT, thereby enabling recycling, thereby improving productivity of the CRT. It helps.

Claims (3)

Funnel, A flat screen panel coupled to the funnel and provided with a fluorescent film on an inner surface thereof; An electron gun mounted in the funnel to emit an electron beam toward a fluorescent film; A shadow mask provided on the inner surface side of the screen panel to color-select the electron beam emitted from the electron gun to contact the fluorescent film; A rail attached to the screen panel to support a shadow mask; Inner shield for preventing the electron night is deflected by the external magnetic field and the purity is lowered, A binding means for detachably binding the inner shield to the rail; Including flat CRT. The method of claim 1, wherein the binding means A fixed spring in the form of a bending piece attached to the rail and having a binding slot, A coupling piece provided at an edge of the inner shield and having a through hole through which a fixed spring passes; A flat CRT tube comprising a locking pin inserted into a binding slot in a state in which a fixed spring penetrates a through hole of the coupling piece, thereby preventing the fixed spring from being separated. The method of claim 2, The binding pin is inserted into the binding slot of the fixed spring is a flat CRT tube, characterized in that made of a band form extending elastically.