KR960001305Y1 - Space control plate for panel and shadow mask of color brown - Google Patents

Abstract

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Description

Adjustment panel for adjusting gap between panel of color brown tube and shadow mask

1 is a perspective view showing an embodiment of the present invention.

Figure 2 is a sectional view of the main portion showing an example of the spacing setting using the present invention.

3 is a sectional view showing main parts of an example of zero adjustment using the present invention.

Figure 4 is a sectional view showing the main part showing the process of assembling the shadow mask and the frame according to the present invention.

Figure 5 is a cross-sectional view of the main part showing a state in which the shadow mask and the panel is assembled according to the present invention.

* Explanation of symbols for main parts of the drawings

10: body 11: gauge ball

12: through hole 13: positioning rod

20: fixed body 21: arm

22: lever 24: spring

30: measuring means

The present invention measures a gap between a panel forming a screen of a color CRT and a shadow mask installed and fixed inside the panel, and a new and useful gap adjusting plate for adjusting and managing the gap between the inside of the panel and the shadow mask so as to simplify and purify it. It is about.

As is already known, blue, green and red electron beams emitted from the electron gun installed in the neck of the panel of the color-brown tube consisting of a panel coated with a fluorescent film on the inner surface and a funnel shaped funnel are mounted on the inner surface of the panel. A color selection structure unique to a color brown tube, which is a shadow mask to accurately land on the formed fluorescent points, is mounted. In manufacturing such a color brown tube, the shadow mask described above must be installed at a predetermined distance from the inner surface of the panel. A color CRT with an optimal picture quality of is obtained.

Therefore, during the production of color CRT, precisely adjusting the gap between CRT panel and shadow mask (for example, referred to as QQ in FIG. It is an important factor.

In the manufacturing process of color brown tube, the above-mentioned PMQ value is almost determined in welding process between shadow mask and frame supporting it. When shadow mask and frame are not welded in place, shadow assembly is assembled inside panel. The gap between the mask and the panel, that is, the PMQ value, will not be the exact distance required at every location.

Conventionally, in the mold shown in FIGS. 3 and 5 of the drawings, the position of the pin holder is set by the adjusting means such as the micrometer in the position of the pin holder. In the extreme case, the shadow mask and the frame are not welded in the correct position, but are twisted and welded so that the PMQ values are not constant at all positions, thereby failing to obtain a desired optimal screen.

The object of the present invention is to provide a gap between the shadow mask and the frame, that is, accurate PMQ value in view of the conventional problems, and a fixed body composed of an arm and a lever at each end of the "T" shaped body. Arrangement is possible, but the arm is movable by inserting a spring in the fixed body, a plurality of gauge holes are drilled in place of the body to configure the measuring means in each, and through the hole in the body place, the positioning rod is detachable There is a characteristic made up.

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

1 is a perspective view of a spacing adjusting plate for easily and accurately adjusting the spacing of the PMQ values of the present invention. The arm 21 and the lever 22 are formed at approximately each end of the body 10 in a substantially T-shaped shape. The built-in fixed body 20, etc. is fixedly arranged and the gauge hole 11 of the triangular shape is drilled in the inner place of the body 10, and the measuring means 30 such as a micrometer is fixed and assembled.

In addition, as shown in FIGS. 2 and 3 of the drawings, the internal structure of the fixed body 20 has a spring 24 disposed at the rear of the arm 21 and the front of the panel 40 or the pin holder 60 at the tip. The pinhole 25 corresponding to the stud pins 41 and 61 provided at the position is drilled, and the lever 22 is inserted in the vertical direction to move the arm 21.

In addition, as shown in FIG. 3 of the drawing, a hole 12 is additionally formed in place of the body 10 of the adjustment plate, so that the positioning rod 13 is detachable in the hole of the lower mold 50 to determine the position of the adjustment plate. Let it be.

4 and 5 are cross-sectional views showing a state in which the shadow mask 80 and the frame 70 are welded and fixed to the panel 40, respectively.

In the figure, reference numeral 23 denotes a slot for securing a space when the lever 22 is moved, and 71 denotes a holder for fixing the stud pins 41, 61 to DP to which the shadow mask 30 is welded and fixed. to be.

Referring to the operation and effects of the present invention configured as described above in detail.

The adjusting plate shown in FIG. 1 should measure the setting value of FIG. 2 when changing the size of the initial panel 40, that is, the size of the color CRT.

This is because the height of the strut pin 41 in each panel 40 must be measured so that the correct PMQ value can be adjusted and managed.

And as shown in the third drawing of the lower mold 50, the pin holder 60, etc., the shadow mask-frame welding apparatus composed of the above adjustment plate is adjusted to the reception.

This process is performed by adjusting the height of the stud pin 41 measured in FIG. 2 minus the PMQ value to the height of the stud pin 61 fixed to the pin holder 60 in the welding apparatus. The exact position is determined.

In this operation, the adjustment means 62 provided below the pin holder 60 arbitrarily adjusts the height of the pin holder 60 or the height of the stud pin 61 so that the scale of the measuring means 30 is less than the third degree. Adjust until you remain political.

At this time, the positioning rod 13 serves to fix the adjustment plate so as not to be biased from side to side.

When the zero adjustment is completed as described above, the shadow mask 80 is placed on the upper bottom mold 50 as shown in FIG. 4 and the frame holder 71 is fixed to the stud pins 61 of the pin holder 60 so that the shadow mask is closed. 80 and the frame 70 are welded in the fixed position.

Then, fixing them to the panel 40, the spacing Q shown in FIG. 5 of the figure, that is, the exact PMQ value is obtained at all positions.

In addition, the above-mentioned zero adjustment work should be carried out periodically to reduce the error caused by the continuous work.

The adjustment plate of the present invention configured as described above allows easy and accurate adjustment of the zero point adjustment of the mask-frame welding device so that the PMQ value interval between the shadow mask and the inside of the panel can be more effectively managed. It is a useful design that can effectively reduce the defective rate caused by the uncertain criteria.

Claims (1)

Arrange the fixed body 20 consisting of the arm 21, the lever 22, etc. at each end of the "T" -shaped body 10, the spring (24) is inserted into the fixed body 20, the arm (21) ) Is configured to be movable, a plurality of gauge holes (11) in place in the body 10 to configure the measuring means 30, respectively, and the positioning hole by drilling a through hole 12 in place of the body (10) An adjustment plate for adjusting the gap between the panel of the color CRT and the shadow mask, characterized in that (13) is detachably configured.