KR940000598Y1 - Shadow mask frame assembler - Google Patents

Abstract

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Description

Shadow Mask Frame Assembly for Cathode Ray Tubes

1 is a bottom view showing a mounting state of a conventional shadow mask frame assembly for a cathode ray tube.

2 is a perspective view showing an extract of the hook spring shown in FIG.

Figure 3 is a bottom view showing the mounting state of the shadow mask frame assembly for a cathode ray tube according to the present invention.

Figure 4 shows the hook spring shown in Figure 3, (a) is an exploded perspective view, (b) is a state of use.

* Explanation of symbols for main parts of the drawings

22: frame 23,23 ': hook spring

23a ': through hole 23b: opening

24: Clamp 26: Stud Pin

The present invention relates to a shadow mask frame assembly for a cathode ray tube, and more particularly to a hook spring of a four-point supported shadow mask frame assembly.

In general, the shadow mask frame assembly includes a shadow mask having a myriad of electron beam through holes formed thereon and a frame supporting the shadow mask frame, which includes a plurality of shadow masks embedded in the inner surface of the panel to maintain a predetermined distance from the inner surface of the panel. It is supported and fixed by a stud pin and a hook spring fixed to the frame by welding. The shadow mask frame assembly is supported by three or four points on the inner surface of the panel. When the four points are supported, the three hook springs welded to the frame are coupled to the stud pins embedded in the inner surface of the panel. Since the last one hook spring is coupled to the state of the center of the corresponding stud pin by the coupling error generated during the coupling, a separate coupling means has been required to couple it to the stud pin. In order to solve the above problems, the conventional shadow mask frame assembly includes three hook springs 13 having through holes 13a formed at the long and short sides of the frame 12, as shown in FIGS. A shadow mask frame assembly 10 in which one hook spring 13 ', in which a through hole 13a' having a diameter larger than the through hole 13a is formed, is welded and fixed, respectively, and the hook springs 13 and 13 '. The panel 15 having the stud pin 16 coupled thereto is buried in an inner side thereof, and the final one that is displaced due to a coupling error generated when the three hook springs 13 are coupled to the stud pin 16. It comprises a support piece 14 formed with a through hole (14a) for coupling the two hook springs 13 'to the stud pin (16).

The shadow mask frame assembly 10 for a cathode ray tube configured as described above has a final deviation from the center of the stud pin 16 due to their coupling error in the state where the three hook springs 13 are coupled to the stud pin 16. One hook spring 13 'first joins the support piece 14 to the stud pin 16 and then welds to one end of the hook spring 13' to fix it. Therefore, due to sparks during welding, the inner surface of the panel 15 may be damaged or slag may be attached to the shadow mask 11 to cause hole clogging, and an excessive force may be applied to the frame 12 during operation. ) Has a problem that is deformed.

Therefore, the present invention has been devised to solve the problems described above, the shadow of the cathode ray tube that can prevent the damage to the inner surface of the panel or blockage of the hole of the shadow mask during installation of the correction means and to suppress the deformation of the frame as much as possible It is an object to provide a mask frame assembly.

In order to achieve the above object, the present invention provides a stud pin corresponding to the hook spring on the inner surface of the panel where the hook spring is fixed to the long and short sides of the frame, and the at least one hook spring includes a corresponding stud pin and a corresponding stud pin. In a shadow mask frame assembly provided with means for correcting a coupling error of said hook means, said correction means comprising a through hole having an opening at one side of said hook spring and a center thereof positioned to clamp the corresponding stud pin. It is characterized by being equipped with a C ″ type clamp.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 3 and 4, the shadow mask frame assembly 20 according to the present invention includes three hook springs 23 having a through hole 23a formed at the long and short sides of the frame 22. One stud that has a diameter larger than the through hole 23a but has one through-hole 23a 'having an opening 23b on one side thereof is welded and embedded in the inner surface of the panel 25. Coupled with pin 26. Meanwhile, a ″ C ″ type clamp 24 is welded and fixed to the center of the through hole 23a 'of the one hook spring 23' to maintain a predetermined distance from its inner circumferential surface, which is a polygon having a predetermined elasticity. Is formed and one side is provided with a bonding portion 24a which is welded to the hook spring 23 '. Preferably, the clamp 24 may be installed at two hook springs 23 at both ends of the frame 22 so that the force applied to the frame 23 is minimized.

The shadow mask frame assembly 20 for a cathode ray tube constructed as described above has a hook spring 23 welded to the long and short sides of the frame 22 by a stud pin 26 embedded in an inner surface of the panel 25. When the three hook springs 23 of 23 are coupled, the last one of the hook springs 23 'is caused by a coupling error of the stud pins 26 engaged with the through holes 23a of the hook springs 23. The center of the stud pin 26 is shifted from the center of the stud pin 26. In this state, the hook spring 23 'through hole 23a' is formed on the outer circumferential surface of the stud pin 26 as shown in FIG. ) C " type clamp 24 is elastically engaged with the stud pin 26 and is spaced a predetermined distance from the inner circumferential surface of the through hole 23a 'of the hook spring 23'. The shadow mask frame is provided on the inner surface of the panel 25 by moving the installed " C " type clamp 24 elastically by an offset amount. The ripche 20 is fixed.

According to the present invention, the clamp is welded to the hook spring before the shadow mask frame assembly is coupled to the inner surface of the panel, thereby preventing damage to the inner surface of the panel or clogging of the shadow mask and eliminating excessive force applied to the frame during operation. Deformation of the frame can be suppressed as much as possible and there is an advantage that easy operation is possible.

Claims (3)

Stud pins corresponding to the hook springs are provided on the inner surface of the panel on which the hook springs welded to the long and short sides of the frame are welded, and the at least one hook spring is provided to correct a coupling error with the corresponding stud pins. In a shadow mask frame assembly for a cathode ray tube provided with means, the correction means includes a through hole (23a ') having an opening (23b) at one side formed in the hook spring (23'), and is located at the center of the corresponding hole. Shadow mask frame assembly for a cathode ray tube, characterized in that it comprises a "C" type clamp (24) for clamping the stud pin (26). The shadow mask frame assembly for a cathode ray tube according to claim 1, wherein said clamp (24) is bent in a polygon. The shadow mask frame assembly for cathode ray tubes according to claim 1 or 2, wherein the clamp (24) is provided on two hook springs (23) at both ends of the frame (22).