KR200150023Y1 - Spring for cathode ray tube - Google Patents

Abstract

The object of the present invention is to provide a corner pin spring for cathode ray tube that prevents rotation of the howling and shadow mask and improves the purity by preventing the initial setting values of the shadow mask, the mask frame and the frame support from changing. A panel on which pins are formed; A shadow mask disposed at a predetermined distance from an inner surface of the panel; A mask frame that supports the shadow mask and shields a magnetic field from the outside; A corner pin spring supporting the mask frame and fixedly supported by a stud pin of the panel; A color cathode ray tube comprising a corner pin spring control member for preventing the corner pin spring from twisting due to spreading of the panel and thermal expansion of the shadow mask.

Description

Corner pin spring of colored cathode ray tube

1 is a partial cross-sectional view of the cathode ray tube is fixed to the mask frame corner pin spring in accordance with a preferred embodiment of the present invention.

2 is a perspective view showing a corner pin spring control member F according to a preferred embodiment of the present invention.

3 is a partial cross-sectional view of a cathode ray tube in which a conventional corner pin spring is fixed to a mask frame.

Figure 4 is a perspective view for showing the twisting phenomenon of the conventional corner pin spring.

* Explanation of symbols for main parts of the drawings

2: shadow mask 3: panel

8: mask frame 10: corner spring

11: corner spring control member

[Industrial use]

The present invention relates to a corner pin spring of a color cathode ray tube, and more particularly, to a corner pin spring capable of preventing the position change and torsion of the cathode ray tube and the position change of a shadow mask. It is about.

[Description of the Prior Art]

In general, a shadow mask type color cathode ray tube consists of at least a panel, a funnel and a necked bulb.

Inside the neck is mounted an electron gun which irradiates red, green, and blue electron beams.

In addition, red, green and blue phosphors are applied to the inner surface of the panel, and shadow masks that serve as sections for the red, green and blue electron beams irradiated from the tank gun are disposed at a predetermined distance from the inner surface of the panel. .

The shadow mask is also supported by a mask frame, which is supported on the panel by a corner spring.

Referring to the general shadow mask type color cathode ray tube as described above in more detail with reference to FIG.

The shadow mask 2 of the cathode ray tube is disposed in the proximal plane facing the three-color fluorescent surface 4 of the panel, and the shadow mask 2 is supported by the mask frame 8, and the mask frame 8 is provided. The corner springs 10 are fixed to the side walls of the c) and are coupled to the panel 3 by the stud pins 9.

The corner spring is attached to the first arm portion 102 of the holder 101 supported by the mask frame 8 and the second arm portion of the spring 104 to the holder 101 and the second arm portion 103. 105 is firmly supported and the first arm portion 106 of the spring 104 is supported by a stud pin 9 which is secured to the panel.

In this color cathode ray tube, the electron beam irradiated from the electron gun passes through the through hole 6 of the electron beam formed in the shadow mask 2 and is irradiated to the fluorescent surface described above.

The electron beam is accurately projected to a predetermined point on the fluorescent surface by passing through the through hole 6 drilled in the shadow mask. In other words, the shadow mask 2 has a function of accurately irradiating an electron beam to the three-color fluorescent surface 4.

[Problem to solve]

However, since the electron beam also collides with a portion other than the through hole 6 of the shadow mask 2, the shadow mask 2 rises in temperature, causing the shadow mask to dome due to thermal expansion. When coupled to the stud pins 9 of the panel 3, the position of the frame changes due to the scattering of the panel 3. This change in the mask frame has a profound effect on the purity.

In other words, in the corner pin spring, when the spring portion 104 is fixed to the stud pin 9, the spring portion 104 is forced by the force P as shown in FIG. ), This force acts as a force (P '), and the spring part is bent and mounted slightly.

In this case, after the suit, the spring portion 104 is subjected to the force P "by the force of returning to its original position by its elasticity, which is twisted in reverse, and accordingly, the position of the frame 8 is changed so that the shadow mask ( 2) rotation will occur.

In addition, the elastic modulus of the spring portion 104 is the same, but because the holder is moved, the spring is moved inward to weaken the force transmitted to the stud pin (9).

The above phenomenon has a problem that acts not only on the purity of the cathode ray tube but also howling.

The present invention was devised to solve such a problem of the conventional cathode ray tube, which prevents rotation of the howling and shadow mask and improves the purity by preventing the initial settings of the shadow mask, the mask frame and the frame support from changing. The purpose is to provide a corner pin spring for a cathode ray tube.

[Way]

In order to realize this, the present invention is a panel having a stud pin is formed; A shadow mask disposed at an interval with an inner surface of the panel; A mask frame which supports the shadow mask and shields a magnetic field from the outside; A corner pin spring supporting the mask frame and fixedly supported by a stud pin of the panel; It provides a color cathode ray tube comprising a corner pin spring control member for preventing the corner pin spring from twisting due to the spread of the panel and thermal expansion of the shadow mask.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention in more detail as follows.

1 is a side cross-sectional view of the corner pin spring according to the present invention attached to the mask frame, and the same reference numerals are given to the same parts as in FIG. 3 in order to avoid duplication of description.

The structure of the corner pin spring 10 according to the present invention has a structure substantially the same as that of the conventional one, and a spring part fixed to the spring holder 101 and the stud pin 9 fixed to the side wall of the mask frame 8. It consists of 104. The holder 101 is composed of a first arm portion 102 which is additionally fixed to the mask frame 8 and a second arm portion 103 extending therefrom, wherein the spring portion 104 has a stud pin 9 ) And a second arm portion 105 coupled to the second arm portion 103 of the holder 101.

The lower portion (in the drawing) of the corner springs thus formed is provided with a corner spring control member 11 for controlling the distortion of the corner spring 10. The structure of the corner spring control member 11 is shown in FIG. More detailed description is as follows.

An adhesive part 111 fixedly supported to the mask frame at the bottom of the corner pin spring (as seen in the drawing), an arc-shaped elastic part 112 extending from the adhesive part, and a bending from the elastic part 112. It consists of a horizontal portion 113 formed to extend and the corner spring support portion 114 formed in the orthogonal direction again from the horizontal portion 113.

The second arm portion 105 of the spring portion 104 of the corner spring 10 is in contact with the inner surface of the support 114.

According to the constitution of the present invention, the first arm portion thereof, as shown in FIG. 4 when the spring portion 106 is mounted on the stud pin 9 due to the scattering of the inner edge portion of the panel 3, is Even if it is wrong, the second arm part is supported by being made in contact with the support part 114 of the corner pin spring control member 11, so that the twist of the first arm part does not affect the second arm part.

In other words, even if the corner pin spring is changed by an external factor, the second arm portion of the spring portion 104 affecting the mask frame is not affected, thereby preventing the deformation of the mask frame and the shadow mask. It becomes possible.

As described above, when the above-described corner spring control member 11 is applied to the corner spring 10 of the color cathode ray tube, conventionally, corner pin springs due to scattering of the panel as well as distortion of the corner pin springs due to thermal expansion of the shadow mask are applied. It is also possible to control the distortion of the cathode ray tube to improve the purity of the cathode ray tube as well as to prevent the howling phenomenon and the rotation of the shadow mask is the advantage that can ultimately damage the quality of the cathode ray tube.

The present invention is not limited to the structure of the embodiment described above, but can be variously modified based on the basic concept of the present invention claimed in the following claims.

Claims (3)

A panel 3 on which stud pins 9 are formed; A shadow mask (2) disposed at an interval with an inner surface of the panel (3); A mask frame 8 supporting the shadow mask 2 and shielding a magnetic field from the outside; A corner pin spring (10) supporting the mask frame (8) and fixedly supported by the stud pins (9) of the panel (3); A color cathode ray tube, characterized in that it comprises a corner pin spring control member (11) for preventing the corner pin spring (10) from warping due to the spread of the panel (3) and thermal expansion of the shadow mask (2). The corner pin spring control member (11) comprises an adhesive portion (111) fixedly supported by a mask frame, an arc-shaped elastic portion (112) extending from the adhesive portion, and the elastic portion (112). Corner pin spring of the color cathode ray tube, characterized in that consisting of a horizontal portion 113 is bent and extended from the horizontal portion 113 and from the horizontal portion 113 back to the corner spring support (114). The corner pin of the color cathode ray tube of claim 2, wherein the corner pin spring control member (11) is supported at the junction of the spring holder portion (101) and the spring portion (104) of the corner pin spring (10). spring.