KR200266304Y1 - Shadow Mask Assembly Support Structure of Cathode Ray Tube - Google Patents

Abstract

A plurality of stud pins 14 having an elliptical cross section are installed in the panel 2, and a spring 12 having an elliptical pin hole 13 into which the stud pins 14 are inserted is formed. It provides a shadow mask assembly support structure of the cathode ray tube fixed to.

As described above, when the cross-sectional shape of the stud pin 14 and the shape of the pin hole 13 formed in the spring 12 are elliptical, between the outer surface of the stud pin 14 and the inner surface of the pin hole 13 by thermal expansion. Even if a gap occurs in the shadow mask assembly, the direction of movement of the shadow mask assembly is directional in a predetermined direction, so that it is possible to compensate for the return and doming and landing return in advance in the design process.

Description

Shadow Mask Assembly Support Structure of Cathode Ray Tube

[Industrial use]

The present invention relates to a shadow mask assembly support structure of a cathode ray tube, and more particularly, to a shadow mask assembly support structure of a cathode ray tube formed by ellipses of a cross section of a stud pin and a pin hole of a spring.

[Prior art]

In general, in a cathode ray tube, a shadow mask assembly composed of a shadow mask, a mask frame, a spring and an inner shield is fixed and supported to a panel by coupling a plurality of springs fixed to the mask frame to a plurality of stud pins installed on the panel. do.

The stud pins are installed on three or four sides of the panel, respectively, or on corners where the sides meet each other.

In the shadow mask assembly supporting structure of the conventional cathode ray tube, as shown in FIG. 4, a plurality of stud pins 7 having a circular cross section are installed in the panel 6, and the studs described above are provided in the spring 12 fixed to the mask frame. A circular pin hole 15 having the same shape as the pin 7 is formed and engaged with the stud pin 7 described above.

As described above, the stud pins 7 installed on the panel 2 not only support the shadow mask assembly in combination with the spring 12 fixed to the mask frame, but also the aluminum coating layer formed on the inner surface of the panel 6. It is electrically connected to the graphite layer of the funnel and functions as a medium for electrically connecting the shadow mask to which high pressure is applied.

[Problem to Solve]

In the shadow mask assembly support structure of the conventional cathode ray tube formed as described above, the pinhole 15 of the spring 12 is extended by the heat generated when the electron beam emitted from the electron gun is irradiated to the shadow mask, thereby expanding the spring 12. A gap occurs between the inner surface of the pin hole 15 of the pin hole 15 and the outer surface of the stud pin 7, and the cross section of the stud pin 7 and the pin hole 15 formed in the spring 12 are circular. The spring 12 and the stud pins 7 are movable in an unspecified direction.

In the conventional shadow mask assembly as described above, there is a problem that the direction of movement of the shadow mask assembly cannot be accurately predicted by the circular shape of the pinhole 15 and the stud pin 7 of the spring 12.

[Means for solving the problem]

Means to devise the present invention to solve the above problems is a cathode ray tube for installing a plurality of stud pins having an elliptical cross section in the panel, and fixing a spring having an elliptical pin hole into which the stud pins are inserted to the mask frame. To provide a shadowmask assembly support structure.

According to the shadow mask assembly supporting structure of the present invention cathode ray tube configured as described above, since the cross-sectional shape of the stud pin and the shape of the pin hole formed in the spring are elliptical, the outer surface of the stud pin and the inside of the pin hole by thermal expansion are formed. Even if a gap occurs between the surfaces, the shadow mask assembly moves in the direction of the long axis of the ellipse.

EXAMPLE

Next, the most preferred embodiment of the shadow mask assembly support structure of the present invention cathode ray tube will be described in detail with reference to the drawings.

First, as shown in FIGS. 1 to 3, one embodiment of the shadow mask assembly supporting structure of the present invention cathode ray tube is provided with a plurality of stud pins 14 having an elliptical cross section in the panel 6, The spring 12 having an elliptical pin hole 13 into which the stud pins 14 are inserted is fixed to the mask frame 10.

According to the shadow mask assembly supporting structure of the present invention cathode ray tube configured as described above, since the cross-sectional shape of the stud pin 14 and the shape of the pin hole 13 formed in the spring 12 are elliptical, the stud pin is formed by thermal expansion. When a gap occurs between the outer surface of the 14 and the inner surface of the pinhole 13, the movement of the shadow mask assembly is suppressed in the minor axis direction of the ellipse, and proceeds in the long axis direction of the ellipse, thereby providing a shadow mask assembly. The direction of movement of Y results in a constant in the major axis direction of the ellipse.

That is, as shown in FIG. 1, in the cathode ray tube composed of the funnel 2, the electron gun 4, the panel 6, and the shadow mask assembly, an electron beam emitted from the electron gun 4 is irradiated to the shadow mask assembly. At this time, the heat of the electron beam causes the shadow mask 8, the mask frame 10, and the spring 12 to thermally expand. At this time, if the pinhole 13 formed in the stud pin 14 and the spring 12 as described above is elliptical, the direction of thermal expansion becomes constant in the major axis direction of the ellipse as compared with the circular shape.

1 is a partial cross-sectional view showing a cathode ray tube to which an embodiment of the shadow mask assembly support structure of the present invention cathode ray tube is applied.

2 is a cross-sectional view taken along line A-A of FIG.

3 is a sectional view taken along line B-B in FIG.

4 is a cross-sectional view corresponding to FIG. 3 showing a shadow mask assembly supporting structure of a conventional cathode ray tube.

* Description of the symbols for the main parts of the drawings *

6: Panel 12: spring 13: pin hole 14: stud pin

According to the shadow mask assembly supporting structure of the present invention cathode ray tube constructed and acting as described above, the movement of the shadow mask assembly has a constant direction in the long axis direction of the ellipse when the shadow mask assembly is moved by thermal expansion by an electron beam. In addition, it is not only possible to design the shadow mask assembly in consideration of the above-mentioned directionality, but also to compensate for the doming of the shadow mask by the electron beam and the return of the landing. Therefore, high quality improvement effect is obtained for geomagnetic margin, tarmac, and color margin margin.

Claims (1)

A plurality of stud pins 14 provided on the panel 6; One end is fixed to the mask frame 10 and a pin hole 13 for inserting the stud pin 14 into the other end is formed, and the mask frame 10 is formed by coupling with the stud pin 14. ) Includes a spring 12 fixedly supporting the inside of the panel 6, The stud pin 14 and the pin hole 13 of the spring 12 are formed in an elliptical shape in which the major axis and the minor axis are set, and when the spring 12 is thermally expanded by the electron beam, the shadow mask assembly moves in the ellipse shape. Shadowmask assembly support structure of the cathode ray tube to be in the long axis direction.