KR100335088B1 - Damper spring for cathode ray tube - Google Patents

Abstract

The present invention relates to a damper spring for a braun tube, and improves the shape of the damper spring so that the damper wire is always kept in position without departing from the edge of the end of the damper spring.

To this end, the present invention, in order to suppress the vibration of the shadow mask, which is a color screening member fixed to the mask frame, the damping spring is installed so as to cross the support and the damp mask spring on both sides of the mask frame in close contact with the damping spring. A CRT having a damper wire welded to the CRT, wherein the end of the damper spring provides a damper spring for the CRT, characterized in that a groove is formed as a means for supporting the damper wire by walking.

Description

Damper spring for cathode ray tube {Damper spring for cathode ray tube}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube, and more particularly, to a damp tube spring for a cathode ray tube installed to suppress vibration of a shadow mask which is a color-selective electrode in a cathode ray tube.

In general, the branch tube forms a fluorescent screen including patterned green, blue and red phosphors on the inner surface of the front panel, and mounts the electron gun to the neck of the funnel, which is the rear body. Three-beam electron beams are controlled under the control of green, blue, and red signals. The electron beams are separated and landed in the respective phosphors through the beam-passing holes formed by the shadow mask before reaching the fluorescent screen. Color implementation is possible.

Referring to Figure 1 of the accompanying drawings, the configuration of such a general CRT will be described.

As shown in FIG. 1, the CRT has a front panel 1 having a fluorescent film screen 2 formed therein, a neck part 6 provided with an electron gun 7 radiating an electric electron beam from the rear, and the neck part. It is provided with a funnel (3) which extends from (6) to the front panel (1) to seal the space through which the electron beam passes and to form a closed space to exclude the external influence when the electron beam is moved.

A deflection yoke is provided on the rear portion of the funnel 3 so as to deflect the electron beam emitted from the electron gun 7 up, down, left and right under the influence of a deflection magnetic field to sequentially scan all the phosphors of the screen 2. (8) is provided.

In the rear portion of the front panel 1, a shadow mask 4 is formed in which a plurality of grid holes 41 through which electron beams pass through corresponding to the phosphor pattern of the screen 2 are formed at predetermined pitch intervals. The mask 4 is supported by the mask frame 5.

The mask frame 5 is elastically supported and fixed by a leaf spring 52 elastically coupled to each of the pair of stud pins 51 fixed to the upper and lower ends of the inner surface of the front panel 1. .

On the other hand, the shadow mask (4), which is usually a color screening member, has a structure in which resonance is likely to occur due to external vibration, and such resonance generates color errors and ages image quality when forming a screen by an electron beam.

Therefore, as shown in FIG. 2, in order to prevent vibration generated in the shadow mask 4, damping springs 9 are provided at both side portions of the mask frame 5, and each of the damping springs 9 is provided. The damper wire 10 is welded to the shadow mask 4 so as to cross and support the shadow mask 4. The damper wire 10 is a very thin tungsten wire of about 15 to 60 μm.

Here, the damper wire 10 coupled to the damper spring 9 has a certain amount of tension to support the shadow mask 4 across the shadow mask 4 to suppress the vibration of the shadow mask 4. .

However, in the dustproof structure by the damper spring 9 and the damper wire 10 as described above, as shown in the enlarged view in FIG. 2, the damper wire 10 is combined with the damper spring 9 and the damper spring. Pass the end edge of the (10), at this time, because the end edge of the damper spring (9) is in a straight line is a damper wire (10) having a certain tension when an external force is applied during assembly or use There was a problem in that the phenomenon of slipping away from the edge of the damper spring (9).

In this case, in the assembling process, the damper wire 10 should be located at the end edge of the damper spring 9 again, resulting in troublesome and delayed work. When such a problem occurs during use, the damper spring 9 and the damper are used. Since the line 10 is not dustproof at all, color error generation and aging of image quality are induced as described above.

Accordingly, the present invention has been made to solve the above problems, by improving the shape of the damping spring to provide a damper spring for the tube so that the damper wire is always kept in position without deviating from the end edge of the damper spring. There is a purpose.

1 is a longitudinal sectional view of the main part showing the configuration of a typical CRT

2 is a perspective view showing an anti-vibration structure of a conventional shadow mask

3 is a perspective view showing an anti-vibration structure of a shadow mask provided with a first embodiment of the damper spring according to the present invention;

Figure 4 is a perspective view showing a second embodiment of the damper spring according to the present invention

5 is a longitudinal cross-sectional view showing a state in which the damping spring of FIG. 4 is installed in the shadow mask and the mask frame;

* Explanation of the reference signs in the main parts of the drawings

4-Shadow Mask 5-Mask Frame

10-Damper Ship 910, 920-Damper Spring

911-Home 921-Incision Home

922-Incision

In order to achieve the above object, the present invention, in order to suppress the vibration of the shadow mask, which is a color screening member fixed to the mask frame, the horizontally in close contact with the damper spring and the shadow mask provided on both side portions of the mask frame A CRT having a damper wire welded to the damper spring to support it, wherein the end of the damper spring is provided with a means for supporting the damper wire by hanging the damper wire.

Hereinafter, with reference to the accompanying drawings an embodiment of a damper spring for CRT according to the present invention will be described in detail.

3 shows a first embodiment of a damping spring according to the present invention. The damping spring 910 is an elongated rectangular metal plate which has elasticity by being bent at various portions, and the damping spring 910 has one end thereof. Ends of the damper wires 10 fixed to both side portions of the mask frame 5, respectively, and opposite to the fixed portions of the damper springs 910, are in close contact with and support the shadow mask 4, which is a color-selecting member. Welded together.

A concave groove 911 is formed in the middle portion of one end edge of the damper spring 910.

On the other hand, the damper wire 10 is a thin tungsten wire having a thickness of about 15 to 60㎛, in combination with the damping spring 910 to support the shadow mask (4) to the shadow mask (4) Suppresses vibrations from

Here, when the damper spring 910 and the damper wire 10 are coupled, the damper wire 10 passes through the groove 911 formed at the end edge portion of the damper spring 910, thereby the damper wire ( The 911 may be prevented from being separated from the damper spring 910 by being caught by the groove 911.

On the other hand, Figure 4 shows a second embodiment of a damping spring according to the present invention, the damping spring 920 of this embodiment is cut in both sides in the middle portion of one end edge of the incision groove whose center is bent to one side 921 and the cut piece 922 are formed, the damper wire 10 when the damper wire 10 and the damper spring 920 is coupled to the damper wire 10 by passing through the cutting groove 921 Deviation from the edge of the damper spring 920 is prevented.

In this case, the damper wire 10 passing through the cutting groove 921 is stably supported by the cutting piece 922 located in the cutting groove 921.

In addition, as shown in FIG. 5, the damper wire 10 may be completely in contact with the end of the shadow mask 4 by adjusting the bending angle θ of the cut piece 922.

That is, in order to extend the curvature of the shadow mask 4 on the mask frame 5, the angle θ of the cut piece 922 is adjusted so that the damper wire 10 is completely in contact with the end of the shadow mask 4. Thus, howling at the end can be prevented.

As described above, according to the present invention, the locking means for supporting the damper wire is formed at the end of the damper spring through which the damper wire passes, so that the damper wire is not separated from the damper spring even when external force is applied during assembly or use. Since it is possible to stably perform the dustproof action, the damper wire and damping spring installation work can be made more easily, and the user's reliability can also be improved.

In addition, by forming an angle-adjustable cutting piece 922 at the end of the damper spring, the damper wire is in close contact with the end of the shadow mask, thereby preventing the howling phenomenon.

Claims (4)

In order to suppress the vibration of the shadow mask, which is a color screening member fixed to the mask frame, a damper spring installed on both sides of the mask frame and a damper wire welded to the damper spring so as to cross and support the shadow mask. In the tube provided with, The damper spring is a damper spring for the CRT, characterized in that a means for supporting the damper wire by hanging on one end thereof is formed. The damper spring for a tube according to claim 1, wherein the means is a groove formed at an end edge of the damper spring. The damper spring for a tube according to claim 1, wherein the means is an incision groove and an incision piece that are formed after being cut in both sides at a part of an end edge of the damper spring. The damping spring for a tube according to claim 3, wherein the inclination angle is set so that the cut piece is on an extension line of the curvature of the shadow mask.