KR100337885B1 - Tension-typed shadow mask assembly for flat cathode ray tube - Google Patents

Abstract

A tension shadow mask assembly of a planar cathode ray tube is disclosed. A tension mask having a flat surface, first and second support members spaced apart from the shadow mask by a predetermined interval, and installed under the first and second support members to burn the first and second support members. The first and second rigid members to be sexually supported, the hook is installed on the first and second rigid members, and is provided on the outer surface of the hook coupling means by a spring coupled to the stud pin of the panel.

Description

Tension-typed shadow mask assembly for flat cathode ray tube}

The present invention relates to a tension type shadow mask assembly, and more particularly, to a tension type shadow mask assembly of a planar cathode ray tube having improved coupling structure between a tension type shadow mask and a panel coupled thereto.

In general, the color cathode ray tube collides with red, green, and blue of the fluorescent film of the inner surface of the panel having a screen surface by passing the electron beam emitted from the electron gun is deflected by the deflection yoke and passes through a number of slits formed in the shadow mask. In this case, the phosphor emits light so that the viewer can watch. Recent color cathode ray tube is researched and developed to completely flatten the outer surface of the panel and the curvature of the inner surface in accordance with Snell's law in consideration of the refractive index to realize a completely flat image that does not appear concave on the actual screen.

1 illustrates a tension shadow mask assembly 10 of a conventional planar cathode ray tube.

Referring to the drawings, the tension type shadow mask assembly 10 is installed in parallel with the tension type shadow mask 11 in the direction of both long sides of the shadow mask 11 to fix the shadow mask 11. A first rigid member installed at a position where both ends are fixed to the lower ends of the support member 12, the second support member 13, and the first and second support members 12 and 13, respectively. 14 and a second rigid member 15.

Although not shown in the figure, the shadow mask 11 is provided with a plurality of strips spaced at predetermined intervals, and intermittent strip-shaped slips are supported by tie bars therebetween.

In addition, a plurality of holders 16 are installed on the sidewalls of the support member 12, and the holder 16 is provided with an elastic member such as a leaf spring 17 to form a stud pin inside the panel of the cathode ray tube. (Not shown). The leaf spring 16 is formed with a coupling hole 17a to be coupled to the stud pin.

In order to manufacture the tension-type shadow mask assembly 11, the first and second support members 12 and 13 are pressed in opposite directions to give a displacement. In this case, the first and second rigid members having elastic force are provided. 14 and 15 are elastically deformed and are in a state where a compressive force is applied.

Next, the shadow mask 11 is welded in a state in which the shadow mask 11 is aligned in the direction of the long sides of the first and second support members 12 and 13 and applied to the first and second support members 12 and 13. The pressing force is removed. Accordingly, the tension shadow mask 11 is fixed to the first and second support members 12 and 13 in a state where a predetermined tension is applied.

In addition, the shadow mask assembly 10 is fixedly installed in the panel, the coupling hole of the plate spring 17 coupled with the holder 16 fixed to the sidewalls of the first and second support members 12 and 13. The stud pins are fixed through 17a.

However, as mentioned above, when the coupling means, for example, the holder 16 and the leaf spring 17 are coupled to the stud pins from the side walls of the first and second support members 12 and 13, When the effective screen of the screen formed on the front of the panel is expanded, interference between the panel and the coupling means may occur, thereby causing a problem in expanding the screen.

The present invention has been made to solve the above problems, the support member for supporting the shadow mask and the rigid member for holding the support member parallel to a predetermined interval of the panel of the tension-type shadow mask assembly is fixed when combined It is an object of the present invention to provide a tension shadow mask assembly of a planar cathode ray tube having an improved structure to facilitate engagement with stud pins.

1 is a schematic perspective view of a conventional tensioned shadow mask assembly;

2 is a schematic exploded perspective view of a cathode ray tube including a tension-type shadow mask assembly according to the present invention;

3 is a partially enlarged perspective view illustrating a coupling unit according to the first embodiment of FIG. 2;

4 is a sectional view showing a coupling means according to the second embodiment of FIG.

<Brief description of symbols for the main parts of the drawings>

10,20 ... tensioned shadowmask assembly

11,21 ... tension shadow mask 12,22 ... 1st support member

13,23 ... 2nd support member 14,24 ... 1st rigid member

15,25 ... 2nd rigid member 16 ... holder

17,27 ... 32 Leaf springs 26,31 Hooks

31a, 41a ... flat part 31b, 41b ... extension part

32a, 42a ... contact 32b, 42b..inclined

32c, 42c ... Joint 32d, 42d ... Joint

33,43 ... Bead part

According to the tension shadow mask assembly of the planar cathode ray tube according to an aspect of the present invention to achieve the above object,

A tension shadow mask having a planar surface in which a number of slits are formed;

A plurality of first and second support members installed at a lower portion of the shadow mask in parallel with a predetermined interval and supporting both side edges of the shadow mask;

A plurality of first and second support members are provided at positions opposite to each other, and one end is coupled to the first support member, and the other end is coupled to the second support member to burn the first and second support members. First and second rigid members supporting sexually; And

And a plurality of coupling means installed on the first and second rigid members so as to be coupled to the stud pins of the panel installed to accommodate the tension shadow mask.

A hook having a flat portion fixed in surface contact with an upper surface of the rigid member facing the shadow mask, and an extension extending vertically from the flat portion; And

And a spring having a contact portion fixed to an outer wall of the extension portion, an inclined portion formed to be inclined downward from the contact portion, and a coupling portion formed with a coupling hole bent downward from the inclined portion and coupled to the stud pin. It is done.

Also,

The coupling means,

A hook having a flat portion fixed in surface contact with a bottom surface of the rigid member facing the shadow mask, and extending from the flat portion vertically upwardly and fixed to an outer wall of the rigid member; And

And a contact portion fixed to an outer surface of the extension portion, an inclination portion formed to be inclined downward by a predetermined angle from the contact portion, and a spring formed with a coupling hole bent downward from the inclination portion and coupled with the stud pin. do.

Furthermore, the bead portion is formed at the end of the extension portion.

Hereinafter, a tension shadow mask assembly according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a planar cathode ray tube comprising a tension shadow mask assembly according to the present invention.

Referring to the drawings, the tension type shadow mask assembly 20 includes a tension type shadow mask 21 having a function of screening an electron beam and applying a tension. The shadow mask 21 includes a plurality of strips 21a spaced at predetermined intervals and a slit 21b through which a myriad of electron beams can pass. The slit 21b is in the form of an intermittent strip, which is supported by tie bars 21c.

A first support member 22 and a second support member 23 supporting the shadow mask 21 are installed below the shadow mask 21. The first and second support members 22 and 23 are arranged in parallel to be spaced apart from each other by a predetermined interval, and have a L-shaped cross section. In addition, an upper surface of the first and second support members 22 and 23 has a mounting surface to which the shadow mask 21 is welded. Both ends of the shadow mask 21 are fixed to the mounting surface in the long side direction.

The first rigid member 24 and the second rigid member 25 are provided on the lower surfaces of the first and second support members 22 and 23 to elastically support the respective support members 22 and 23. . In the state in which the first and second rigid members 24 and 25 are disposed to face each other, one end is fixed to the lower surface of the first support member 22, and each other end is fixed to the second support member 23. It is fixed to the bottom of).

Here, the first and second rigid members 24 and 25 may include hooks 26 coupled to stud pins 29 formed on sidewalls of the panel 28 for receiving the tension-type shadow mask assembly 20. In addition, an elastic bias means fixed to the hook 26, for example, a coupling means made of a leaf spring 27 is installed. At this time, the coupling means is protruded beyond the upper surface of the first and second support members 22 and 23 to be careful not to cause interference with the shadow mask 21.

Figure 3 shows a first embodiment of such a coupling means.

Referring to the drawings, the hook 31 is fixed to the upper surface of the rigid member 24 facing the shadow mask 21 (see Fig. 2).

The hook 31 includes a flat portion 31a fixed in surface contact with the upper surface of the rigid member 23, and an extension portion 31b integrally extending upward from the flat portion 31a. The cross section maintains the L shape.

In addition, a leaf spring 32 coupled to the stud pin 29 shown in FIG. 2 is installed on the rear surface of the extension part 31b. That is, the leaf spring 32 is the contact portion 32a which is in surface contact with the rear surface of the extension portion 31b, the inclined portion 32b extending inclined downward from the contact portion 32a by a predetermined angle, and the inclined portion And a coupling portion 32d, which is bent downward from the end of the portion 32b and has a coupling hole 32c to which the stud pin 29 is coupled.

Meanwhile, a plurality of bead portions 33 are formed at ends of the extension part 31b of the hook 31 to prevent deformation due to thermal expansion of the shadow mask 21.

Figure 4 shows a coupling means according to a second embodiment of the present invention.

Referring to the drawings, the hook 41 is coupled to the outer surface of the rigid member 24. That is, the planar portion 41a is fixed to the lower surface of the rigid member 24 opposite to the tension shadow mask 21 (see FIG. 2).

An extension portion 41b which is integrally bent from the planar portion 41a and surface-contacted to the outer wall is extended to the outer wall of the rigid member 24 provided to face each other. In this case, the hook 41 surrounds the outer surface of the rigid member 24.

The extension portion 41b is attached with a leaf spring 42 which is an elastic biasing means. That is, the flat contact portion 42a is fixed in surface contact with the outer surface of the extension portion 41b. An inclined portion 42b formed to be inclined downward from a predetermined angle extends from the end of the contact portion 42a, and the engaging portion 42d is bent vertically downward from the contact portion 42a. A coupling hole 42c is formed in the coupling portion 42d to which the stud pins 29 of the panel 28 illustrated in FIG. 2 are coupled and fixed. Reference numeral 43, which has not been described, is a plurality of bead portions formed at the ends of the extension portion 41b.

A process for manufacturing a tension type shadow mask assembly having such a structure will be briefly described with reference to FIG. 2.

First, the first and second supporting members 22 and 23 are pressed inward to face each other to give a displacement. According to the displacement of the first and second support members 22 and 23, the first and second rigid members 24 and 25 supporting the first and second support members 22 and 23 are elastically deformed with a compressive force.

Then, the shadow mask 21 of the planar shape is welded to the upper surface of the first and second support members 22 and 23 in a state where the end portions in the long side direction are aligned. Subsequently, the pressing force applied to the first and second support members 22 and 23 is released.

When the pressing force of the first and second supporting members 22 and 23 is released, the first and second rigid members 24 and 25 are restored to their original position in the compressed state, and thus, the tension shadow The mask 21 is fixed to the first and second supporting members 22 and 23 in a state where a predetermined tension is applied.

Next, the panel 28 from the top of the shadow mask assembly 20 is mounted to receive it. That is, the shadow mask assembly 20 is positioned in an internal space provided inside the panel 28, and the plurality of stud pins 29 protruding from the side wall of the panel 28 are first and second rigid members. (24) is fixed to the coupling means formed in (25).

That is, the hook 26 is welded to the first and second rigid members 24 and 25 by surface contact with the upper surface and the lower surface of the rigid members 24 and 25. And, the outer surface of the hook 26 is coupled to the leaf spring 27 having an elastic force, the stud pin 29 is fixed to the leaf spring (27).

Accordingly, the electron beam emitted by the electron gun in a state where a predetermined tension is applied to the shadow mask assembly 20 in the panel 28 passes through the slip 21b of the tension shadow mask 21 to accurately land in the fluorescent film. This is possible.

As described above, the tension type shadow mask assembly of the planar cathode ray tube of the present invention is provided with a hook and a spring coupled to a plurality of rigid members installed under the support member for supporting the shadow mask, so that the stud pin of the panel is provided. In combination with the tension mask assembly to prevent interference with the panel.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (5)

A tension shadow mask having a planar surface in which a number of slits are formed; First and second support members installed in parallel to a lower portion of the shadow mask and supporting both edges of the shadow mask; First and second rigid members installed at positions opposite to the lower portion of the support member, and having one end coupled to the first support member and the other end coupled to the second support member to support the pair of support members. ; And And a coupling means installed on the pair of rigid members to be coupled to the stud pins of the panel installed to accommodate the tension shadow mask on the tension shadow mask. The method of claim 1, The coupling means, A hook having a flat part fixed in surface contact with an upper surface of the rigid member facing the shadow mask, and an extension part bent vertically from the flat part; And And a leaf spring having a contact portion fixed to an outer wall of the extension portion, an inclined portion formed downwardly from the contact portion, and a coupling portion formed with a coupling hole bent downward from the inclined portion and engaged with the stud pin. A tension shadow mask assembly of a planar cathode ray tube. The method of claim 1, The coupling means, A hook having a flat portion fixed in surface contact with a bottom surface of the rigid member facing the shadow mask, and an extension portion bent vertically upwardly integrally from the flat portion and fixed to an outer wall of the rigid member; And And a contact portion fixed to the outer wall of the extension portion, an inclined portion formed downward from the contact portion, and a leaf spring bent downward from the inclined portion and having a coupling hole to which the stud pin is coupled. Tension shadow mask assembly of cathode ray tube. The method according to claim 2 or 3, Tension shadow mask assembly of the planar cathode-ray tube, characterized in that the bead is formed at the end of the extension. Claim 5 has been deleted.