KR920008709Y1 - Inner shield and support frame structure of color pictured tube - Google Patents

Abstract

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Description

Inner shield and support frame structure of color water pipe

1 is a schematic structural diagram of a general color water pipe.

2 is a reference diagram showing the structure of the support frame and the processing procedure thereof in FIG.

3 is a reference diagram showing the size difference between the second member and the remaining member cut by pressing from the support frame of FIG.

4 is a reference diagram showing the design method of the support frame in the second.

5 is a reference diagram illustrating the occurrence of diffused reflection at the electron beam side at the support frame and at the support frame side of the emitted beam at the support frame.

6 is a reference diagram of the support frame according to the present invention.

FIG. 7 is a reference diagram showing the occurrence of the reflected beam on the support frame side and the emitted beam on the electron gun side in the support frame in FIG. 6;

8 is a reference diagram showing the relationship between the support frame and the inner shield in FIG.

* Explanation of symbols for the main parts of the drawings

1: Support frame 1b: Cutting part

3: scrap 3b: oblong parts

15: extension part

The present invention relates to the support frame of the shadow mask used in the color water pipe, which is common to the processing of the type corresponding to the model having a relatively large water pipe as a member and a small model, especially when processing the support frame. It is about improved structure of satisfactory support frame and inner shield.

A schematic structure of a conventional shadow mask type color water column (or color cathode ray tube) is shown in FIG.

Here, the panel 11 having the fluorescent surface 12 of the three-color fluorescent layer of red, green, and blue inside the brine tube from the top of the drawing, and the shadow mask 13 arranged at a predetermined interval on the mold tube surface 12. Are arranged in sequence.

In addition, the shadow mask 13 has a support frame 14 for supporting it at the edge side, the support frame 14 is fixed to the stud pin attached to the inner wall of the panel 11, the support On the lower end of the frame 14 side, an electron shield or an inner shield 15, which is a magnetic shield, is attached and fixed.

In addition, the rear side includes a funnel-shaped funnel 16 in cross section and a neck 18 bar extending from the funnel 16, in which an electron gun 19 is disposed.

In addition, reference numeral 17 here is a deflection yoke.

In this type of color water pipe, the shadow mask 13 and the support frame 14 are welded and assembled to each other, and then fitted to the panel 11 to be fixed and formed to form a fluorescent surface 12. 15) is processed into a predetermined shape through blanking, drawing, piercing, etc., using a press and a mold, and prevents oxidation and operation during handling during the manufacturing process of color water pipes. In order to increase radiant heat, a blackening film is formed on the surface.

In addition, the manufacturing process of the support frame 14 is shown as an example as shown in FIG.

That is, as shown in FIG. 2A, the workpiece 21 by the blanking operation is obtained from the metal sheet 2 having the short side width a and the long side width b.

Thereafter, the workpiece 21 is in the form of a support frame member 21a such as through drawing (b), and undergoes a work of forming a predetermined size opening 21b through a piercing operation. The remaining member 21c by 21b) remains.

On the other hand, the ordinary color water pipe is generally applied to the support frame 14 in the inner shield 15 or the electromagnetic shield as follows, depending on the variety.

That is, 1. Inner shield (15) and the electron shield is present at the same time, 2. Inner shield (15) is present, 3. Only the electromagnetic shield is used in the form of such.

Here, conventionally, when the opening diameter of the inner opening 21b of the support frame 14 is d among the types related to the above-mentioned item 2, the extracted form of the structure is shown in FIG.

Here, the support frame is such that the beam emitted from the electron gun 19 side hits the inner side of the side wall 14b as shown in FIG. 5 (a) as shown in the lower side 14a end of the support frame 14 or (b). It is usually designed with sufficient consideration not to cause it.

Then, in the color cathode ray tube having a deflection angle of 90 ° and an electron gun 19 aperture of 290 (mm), the developed part dimensions of the support frame 14 ((a) a'xb 'in FIG. 2) and the opening portion 21b. Dimensions vary depending on the product, but for example 19V type and representative varieties are shown as (Table 1).

TABLE 1

In this prior art, in the manufacturing technique of the support frame l4 as shown in FIG. 2, the remaining member 21c is formed by forming the opening 21b of a predetermined size through the piercing operation from the support frame member 21a as mentioned above. ), And the remaining member 21c had a problem in reusing for the 13V to the above (Table 1).

In other words, in the case of 19V, the weight of the material is 1657gr, but the use of the product causes the increase in manufacturing cost of the color cathode ray tube because 680gr uses only 50% of material except scrap.

In addition, the residual member 21c used the scrap of the opening for 13V, its long diameter and total weight was larger than the development dimension of 13V, but because the short diameter was small, it was a problem to utilize the residual member 14C. However, it is possible to cope with color water pipes smaller than 13V only when the thickness t is the same.

As described above, since there is no means for the remaining member left from the support frame to be utilized as the support frame of another possible small model, this causes the problem of intensifying the waste of the member and raising the price of the overall set of the receiver. It was not desirable.

It is an object of the present invention to provide an inner shield and a support frame structure of a color water pipe designed so that the remaining members of the support frame as described above can be utilized as a support frame of a small model.

The present invention is a support frame having a cut-out portion so that the axial opening diameter of the support frame, which is designed to a predetermined size, has a larger size. It is characterized by the inner shield and support frame structure of the color water pipe of the structure.

This will be described in more detail below.

That is, Figure 6 shows the support frame (1) according to the present invention.

Here, the cutting part 1b cut in arbitrary width in the long side direction is formed in the opening part 1a of the support frame 1, and the scrap 3 isolate | separated by this is made into the shape which has the rectangular protrusion part 3b. .

The opening (1a), one side of the long side direction of the diameter of the support hureim 1 is a conventional design value is as large d ₂ than when referred to as d _1, the long Bandol portion (3b) is a member to be processed aimed at small model (31 Given the size of).

In addition, when the short- _circuit opening diameter becomes d ₁ → d ₂ and the opening diameter on the inner shield 15 side is di, the opening diameter di is defined by the extension part 15a by a predetermined width d ₂ -d ₁ . which extends opening diameter is in a configuration as d _0.

The present invention of this configuration is as follows.

The normal support frame opening diameter d ₁ is determined by the positional relationship of the electron gun 19 and the shadow mask 13 panel 11, respectively.

That is, here, referring to FIG. 4, L; The distance between the electron gun 19 and the center of the inner surface of the panel 11, α; The aperture distance between the electron gun 19 and the support frame 14, D; The distance between the effective outermost circumferential surface in the tube axis of the color cathode ray tube, d ₁ ; Horizontal distance (for example, support frame opening diameter) from the color water pipe tube axis to the lower side of the support frame 14; Deflection angle, S; Red, green, blue and green distance of the electron gun 19, C; When referred to as clearance or tolerance, d ₁ mentioned above becomes S + .tan0 + C as shown in FIGS. 4 and 7.

Here, the clearance (C) refers to the processing frame and assembly error of the associated parts themselves, including the support frame 14, and, if the opening diameter is smaller than the predetermined dimension, as described above, the support frame (a) in FIG. 14) A shadow is generated by hitting the lower side 14a. On the contrary, when d ₂ is large as in d ₂ , an overscanned electron beam such as b causes secondary electrons to cause diffuse reflection.

Therefore, according to the present invention, an opening diameter d ₂ having an allowable width aimed at the third small work piece 31 and a long side cut-out portion 1b for increasing the short-axis direction short diameter of the work piece 31 axis are provided. Instead of being formed, when the opening diameter on the inner shield 15 side is di, the opening diameter can be solved by the extension part 15a.

Also, as shown in FIG. 8, when the width of the flat portion including the flat extension portion 15a on the inner shield 15 side is W, it is designed in consideration of the increase in the opening diameter of the support frame 1 of FIG. It is done.

In addition, due to the inner shield having the support frame 1 and the extension part 15a having the above configuration requirements, as an example, the economic effect that occurs when the opening scrap for 19V can be utilized for 13V is shown in Table 2 Same as

TABLE 2

Thus, it can be seen that the efficiency and economic advantages of using the material have been increased.

In addition, the present invention applies only the inner shield, but has an effect that can be sufficiently applied to the model using the electronic shield or both.

Claims (3)

In the form where the support frame and inner shield of the color cathode ray tube are of the long axis opening diameter of the support frame and the inner diameter of the inner shield short axis of the support frame is di, the support frame 1 is formed with a short axis cutting section 1b. Subsequently, the separated scrap 3 has a rectangular protrusion 3b, and the inner shield is formed by increasing the length 15a by the cut portion Δd of the support frame 1 of the color water pipe. Inner shield and support frame structure. _2. The inner frame and the support frame of the color receiving pipe according to claim 1, wherein the support frame 1 has a shape in which the long side opening diameter of the opening 1a side is larger than the existing design value d ₁ . rescue. The inner shield and support frame structure of the color receiving pipe according to claim 1, wherein the inner shield (15) extends the length of the support frame (1) by the cut portion (Δd).