JPS5832336A - Cathode-ray tube - Google Patents

Abstract

PURPOSE:To increase both the yield and quality of a cathode-ray tube by enlarging the space provided between a mount pin and a neck glass in order to facilitate sealing work carried out by fusing a stem, which supports an electron gun, to the neck of the cathode-ray tube. CONSTITUTION:After the unnecessary part of a cullet 10 is cut down from a neck glass 1, the neck glass 1 and a stem 2 are fused with the flare 8 of a burner 7 so as to obtain a sealed part 9 with an appropriate shape. Here, a concave 14a is provided on the upper circumference end of the outer wall of a mount pin 14 so as to enlarge the space between the mount pin 14 and a neck glass 1a. As a rsult, the temperature of the glass 1a is easily increased with the burner 7 to the temperature needed for the fusing cut, and the cullet 10 can be quite easily cut down without causing the glass 1 to adhere to the upper end of the pin 14. Consequently, both the yield and the quality of the cathode-ray tube can be greatly increased.

Description

[Detailed Description of the Invention] This invention relates to a cathode ray tube that is designed to improve yield and quality in the sealing process when a stem supporting an electron gun is melted in the neck of the cathode ray tube. .

Figures s1 and 2 show the heat resistance state of conventional cathode ray tubes, Figure 1 shows the state before snow resistance, and Figure 2 shows the sealing machine. In the figure, (1) is the neck glass, (2) is the stem, (3) and (4) are the reeds and exhaust pipes that constitute part of the stem (2), (5) is the electron gun, and (6) is the a mount bin disposed at a predetermined position relative to the neck glass (1) and holding the stem (2); (7) a burner for heating and melting the neck glass (1) and the stem (2); (81 is a flame. The material constituting the stem (2) is usually glass except for the lead (3), and its thermal properties such as the coefficient of thermal expansion are almost the same as the neck glass (1). To be elected.

Generally, the neck glass (1) and stem (2) are placed in the state shown in Figure 1 and sealed! However, as shown in Figure 2, the state of the sealing machine is such that the unnecessary part of the neck glass (1), the cullet αl, is cut off, and the neck glass (1) is cut off.
1), stem (2), and burner (71 flames) are heated and melted using a trowel to create an appropriately shaped seal 11 m (9
) is now available.

However, in actual sealing work, a visualized device (
(not shown), the above-mentioned snow resistance may be exceeded, and the current αl may not be completely cut off as shown in the third case, or even if it can be cut off, the snow resistance limit may be reduced as shown in the j14 case. (9) Products with poor shapes may be produced, resulting in a serious decline in yield and quality.

In other words, Figure 1j3 shows the state in front of the grave where the current concavity is cut off, and from this state, the neck glass (11) at the upper end of the mount pin (6) is cut by melting, or the connection with the mount Binta). Because the space music is small, the neck gala,
If the temperature of X (11) rises at the rate fA @ it required for fusing, the current may be cut off. As shown in the special number ζ diagram, when the neck glass (1) is closely placed on the top of the mount bottle (6), the heat is transferred to the mount bottle (6).
) Since the temperature of the neck glass (Xa) does not rise, cutting becomes more difficult.

Figure 184 shows the state after snow resistance when the neck glass (11) cannot be @llr, and unmelted Shinto 0 remains and becomes defective.

In this way, in the conventional mounting bin (6), the space (1) between the pin and the neck glass (1) is small, so there are many cases where the current book cannot be cut off, and the yield rate is 9. There was a big problem.

In order to solve the above-mentioned conventional drawbacks, the present invention
It is an object of the present invention to provide a cathode ray tube which can enlarge the space between the mount bottle and the neck glass, and improve yield and quality.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 185 and FIG. 6 show a cathode ray tube according to an embodiment of the present invention during sealing operation, and in the figures, the same reference numerals as in FIG. 1 indicate the same parts. α41 indicates a mounting pin according to the present invention, and this mounting pin α has a recess (14!l) on the outer circumference of its upper end. As you can see from the figure, the mount pin α4 Ni< number (14$1)
By providing this, the space between the mount bottle round and the neck glass (11) becomes very large, and therefore the neck glass (l depth) requires less AI for fusing than the burner (7).
The current σ can be easily cut off as well. ξThe important thing here is that with the mount bin αΦ according to the present invention: ・1 is because the neck glass (1 m) can be easily raised.
The firepower of the flame (-) of the bar (17) can be made smaller than that of the conventional mount bottle (6), so the neck glass (1) can be secretly watched at the top of the mount bottle. It is possible to cut off the current [phase].

As a result, yield and quality can be dramatically improved.

Figure 7 shows only the above-mentioned mount bottle circle, and (14
1) is a recess provided on the outer periphery of the upper end, (14b) (
14c) is a lead hole and an exhaust pipe hole.

FIG. 8 shows mounting bins αe of different shapes in a monopole tube G according to another embodiment of the present invention, where (16m) is a recess, and (16b) and (16c) are a lead hole and an exhaust pipe hole, respectively. .

It should be noted that the material of the mount bottle of the present invention is not limited to metal, and it is evident that non-metal is also effective.

As described above, according to the present invention, in order to increase the space between the mount bottle and the neck glass, the mount bottle has the outer diameter ζ recess formed at the upper end of the mount bottle, making it extremely easy to cut off the current and improve yield. This has the effect of dramatically increasing quality.

[Brief explanation of the drawing]

Figure s1 and the second figure are diagrams showing the sealed state of the conventional monopole tube before and after snow resistance, respectively, $3111. 5 and 6 are diagrams for explaining the sealing work of a cathode ray tube according to one embodiment of the present invention, and FIG. 8 is a sectional view showing a mounting bin according to two embodiments of the present invention. (1)... Neck glass, (2j... Stem, α4
1 (m!...Mount bin. In the drawings, the same reference numerals indicate the same or equivalent width. Substitute person: Rei Kuzuno - Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] (1) A neck glass, a mount bottle placed in a predetermined position relative to the neck glass and holding a stem;
The mount bin is characterized by having a recess provided on the outer periphery of the upper end of the mount bin to form a large space between the mount bin and the melting head of the neck glass when melting the neck glass and the stem. cathode ray tube.