JP2002260542A - Panel-pin, glass panel of cathode-ray tube using the same, and cathode ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel-pin which can be easily processed and is superior in strength, and also provide a glass panel of a cathode-ray tube and a cathode- ray tube which is capable of suppressing color purity shift or the like caused by defective fixing of a shadow mask or an aperture grille. SOLUTION: In panel-pins for fixing a shadow mask or an aperture grille to the panel of a cathode-ray tube, the ratio of the thickness at a shoulder portion t2 to the thickness at a holding portion t1 , (t2 /t1 ), or the ratio of the thickness at the shoulder portion t2 to the thickness at a head portion t3 , (t2 /t3 ), is set not less than 1.10, and the ratio of the thickness at the shoulder portion t2 to the length at the shoulder portion (a), (t2 /a) is set not less than 0.65.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel pin, a glass panel for a cathode ray tube and a cathode ray tube using the same,
In particular, the present invention relates to a panel pin having excellent strength, and a glass panel for a cathode ray tube and a cathode ray tube using the same.

[0002]

2. Description of the Related Art Cathode ray tubes (CRTs) used as color televisions and computer terminal displays are:
Generally, it has a structure as shown in FIG. That is, the cathode ray tube for a color television has a vacuum envelope including a rectangular panel (face plate) 18, a funnel 19 having a funnel shape, and a neck 20.

On the inner surface of a panel (face plate) 18, red (R), green (G), and blue (B), which are three primary colors, are provided.
The light emitting phosphor layer 21 is formed in a stripe shape or a dot shape, and an electron gun 23 for emitting an electron beam 22 corresponding to red, green, and blue is provided in the neck 20. A shadow mask 24 having a large number of fine openings is supported and fixed to the inner surface of the panel 18 via panel pins 25 at a position close to and opposed to the phosphor layer 21.

The electron beams 22 accelerated by a constant voltage in three electron guns 23 corresponding to the phosphors of each emission color (B, G, R) are converged by an electron lens 26 and furthermore, a deflection yoke 27 Can turn the course. Then, the three electron beams that have passed through the shadow mask 24 are selectively irradiated to the phosphor layer 21 to cause excitation light emission, and a color image composed of all colors is reproduced by additive color mixing of the respective light emissions.

In the above-described cathode ray tube, the shadow mask 24 is held and fixed by a support structure as shown in FIG. That is, the substantially cylindrical panel pin 25
Is heated to a high temperature of, for example, 900 ° C. or more to form an oxide film on the surface of the panel pin, and then the base end of the panel pin 25 heated to a high temperature exceeding the working temperature of the glass panel as shown in FIG. Side wall 18 of glass panel 18
The panel pin 25 is pushed into a predetermined position on the inner surface of the panel a, and the panel pin 25 is fused and fixed to the side wall 18a of the panel 18 by the molten glass.

The shadow mask 24 has a rectangular mask frame 24a attached to the periphery of the main body.
The mask frame 24a is arranged such that the shadow mask body faces the phosphor layer 21 at a predetermined distance.
At least the side wall is supported by the panel side wall 18a via the elastic holder 28. Each holder 28 has one end fixed to the mask frame 24a and the panel 18
And the other end locked by a panel pin 25 provided on the inner surface of the side wall 18a.

For panel pins, ferrite-based stainless steel such as an 18 mass% Cr-Fe alloy having a thermal expansion coefficient similar to that of special glass for a cathode ray tube is widely used. When such a ferritic stainless steel is used as a panel pin, usually, after a ferritic stainless steel material is processed into a desired panel pin shape, this is heat-treated, for example, in a wet hydrogen atmosphere, so that its surface has a wettability with glass. An excellent oxide film is formed, and in this state, it is sealed to a glass panel of a cathode ray tube.

[0008]

In recent years, as the size and definition of cathode ray tubes have increased, the load on panel pins has increased, and the problem of mislanding causing color misregistration has become severe.

The above-described panel pin made of ferritic stainless steel has a characteristic that its thermal expansion coefficient is close to that of glass, but the strength and deformation resistance of a pressed pin (hereinafter, referred to as a press pin) are obtained. Because of the insufficient mechanical properties of the shadow mask, the shadow mask is likely to be deformed when the shadow mask is attached to the panel pin via the frame holder, or the shadow mask is likely to be misaligned when subjected to an external impact. It has caused such a problem.

In order to solve such a problem, there is a method in which a panel pin is manufactured by cold forging (hereinafter, referred to as a forged pin), and a shoulder and a head are formed into a block to improve strength. Further, as disclosed in Japanese Patent Application Laid-Open No. 8-203442, the thickness of the support portion is made thicker than the
There is a method for improving the strength of the support portion.

However, since the forging pin is difficult to form, the cost of parts tends to be higher than that of the press pin. In addition, from the relationship between the internal volume of the pin and the volume of the closed air at the time of sealing, generally, when the internal volume of the pin is small, the internal pressure at the time of sealing the pin to the glass becomes low, and the glass sealing property deteriorates. . When the thickness of the pin is reduced to increase the internal volume of the pin, there is a problem that the strength is reduced.

The present invention has been made to solve the above-mentioned problems, and has as its object to provide a panel pin which is easy to process, has excellent strength, and has good glass sealing properties. Another object of the present invention is to provide a glass panel for a cathode ray tube and a cathode ray tube in which the use of the panel pins suppresses the occurrence of an initial defect and a shadow mask displacement error.

[0013]

The inventors of the present invention have conducted various studies on the strength of the panel pin and the sealing property of the glass, and found that a method of increasing the thickness of the shoulder portion of the panel pin and a method of reducing the length of the shoulder portion were adopted. It was found that it was possible to increase the strength and deformation resistance of the pin. Moreover, according to this method, the internal volume of the panel pin can be secured,
It has been found that glass sealing properties comparable to ordinary pins can be obtained.

[0014] panel pin of the present invention is a panel pin for holding a shadow mask or aperture grille is sealed to the cathode ray tube panel, the ratio of the thickness t ₂ of the shoulder to the thickness t ₁ of the support portion (t ₂ / t ₁ ) or the ratio of the shoulder thickness t _{2 to} the head thickness t ₃ (t ₂ / t ₃ ) is 1.
The number is 10 or more.

The thickness t ₂ of the shoulder with respect to the thickness t ₁ of the support is t _2.
Ratio (t ₂ / t ₁ ) or the ratio of the shoulder thickness t _{2 to} the head thickness t ₃ (t ₂ / t ₃ ) is 1.10 or more, preferably 1.30 or more. Thus, the strength of the panel pins can be improved, and the panel pins can be used for fixing a large mask. In particular, in this arrangement, the ratio of the thickness _{t 2} of the shoulder to the thickness _{t 4} of the skirt portion _{(t 2 / t 4) 1} .
By making it 10 or more, the strength can be further improved.

The panel pin of the present invention is a panel pin which is sealed to a panel for a cathode ray tube and holds a shadow mask or an aperture grille, and has a ratio of a shoulder thickness t ₂ to a shoulder length a ( t ₂ / a) is 0.65 or more. The ratio (t ₂ / a) of the thickness t ₂ of the shoulder to the length a of the shoulder is 0.65 or more;
Preferably, the strength can be further improved by setting it to 0.90 or more.

The glass panel for a cathode ray tube of the present invention has a base end.
Part is welded to the inner surface of the panel of the cathode ray tube,
Contact the periphery of the shadow mask or aperture grille
Combined with the shadow mask or aperture grill
A panel pin fixed to a fixed position;
Thickness of the supporting part of t₁Shoulder thickness t₂Ratio (t ₂
/ T₁) Or head thickness t₃Shoulder thickness t₂of
Ratio (t₂/ T₃) Is 1.10 or more.
Things.

Further, in another glass panel for a cathode ray tube according to the present invention, a base end portion is fusion-welded to an inner surface of the panel of the cathode ray tube, and a front end portion is joined to a peripheral edge portion of a shadow mask or an aperture grille. Alternatively, a panel pin for fixing the aperture grill at a predetermined position is provided, and a ratio (t ₂ / a) of the thickness t ₂ of the shoulder to the length a of the shoulder of the panel pin is 0.65 or more. Is what you do.

A cathode ray tube according to the present invention comprises: a vacuum envelope having a panel; a phosphor layer provided on an inner surface of the panel; and an electron gun disposed at a position facing the panel of the vacuum envelope. A shadow mask or aperture grill disposed between the phosphor layer and the electron gun; a base end portion fused to the inner surface of the panel of the cathode ray tube; and a tip end portion located at a peripheral portion of the shadow mask or aperture grille. and a panel pin which are joined for fixing the shadow mask or aperture grille into position and the ratio of the thickness t ₂ of the shoulder to the thickness t ₁ of the support portion of the panel pin (t 2 _/ t
₁ ) or the ratio of the thickness t ₂ of the shoulder to the thickness t _{3 of the} head (t ₂ / t ₃ ) is 1.10 or more.

Further, another cathode ray tube according to the present invention is arranged in a vacuum envelope having a panel, a phosphor layer provided on an inner surface of the panel, and a position facing the panel of the vacuum envelope. An electron gun, a shadow mask or aperture grill disposed between the phosphor layer and the electron gun, a base end portion of which is fusion-welded to an inner surface of the panel of the cathode ray tube, and a tip end portion of which is the shadow mask or aperture. is joined to the periphery of the grill and a panel pin for fixing the shadow mask or aperture grille in position, the ratio of the thickness t ₂ of the shoulder to the length a of the shoulder portion of said panel pin (t
₂ / a) is 0.65 or more.

The cathode ray tube glass panel of the present invention, the cathode ray tube, a panel pin for fixing the shadow mask or aperture grille in position, the ratio of the thickness t ₂ of the shoulder to the thickness t ₁ of the support part ( t ₂ / _{t 1)} or a ratio of the thickness _{t 2} of the shoulder to the thickness _{t 3} of the head _(t 2 /
By using a panel pin having t ₃ ) of 1.10 or more, preferably 1.30 or more, it is possible to suppress displacement due to deformation of the panel pin even when a large shadow mask or an aperture grill is used.

Further, the glass panel for a cathode ray tube of the present invention,
In a cathode ray tube, the strength of the panel pin can be improved in the same manner as described above by using a panel pin having a ratio of the thickness t ₂ of the shoulder to the length a of the shoulder (t ₂ / a) of 0.65 or more. Also, even when a large shadow mask or an aperture grill is used, it is possible to suppress the displacement due to the deformation of the panel pin.

Further, in the present invention, the skirt of the panel pin is provided.
Part thickness t₄Shoulder thickness t ₂Ratio (t₂/
t₄) Is 1.10 or more, so that the panel pin
Position of shadow mask, aperture grill, etc. due to deformation
The displacement can be further suppressed.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing the shape of the panel pin of the present invention. FIG. 2 is a sectional view showing a sectional shape of the panel pin shown in FIG.

The panel pin 1 of the present invention has a substantially cylindrical shape as shown in FIG. Here, 2 indicates a skirt, 3 indicates a shoulder, 4 indicates a support, and 5 indicates a head. Further, t ₁ described in the sectional view shown in FIG. 2 the thickness of the support 4,
t ₂ indicates the thickness of the shoulder 3, t ₃ indicates the thickness of the head 5, and t ₄ indicates the thickness of the skirt 2. In the drawing, a indicates the length of the shoulder 3.

In the case of the panel pin of the present invention,
At the thickness t of the support₁Shoulder thickness t₂of
Ratio (t₂/ T₁) Or head thickness t₃Shoulder thickness against
T ₂Ratio (t₂/ T₃) Is 1.10 or more.

Shadow mask or aperture around shoulder 3
These weights are added when fixing the grille.
It is the part that is easily deformed. The present invention, as described above,
Thickness of support part t₁Shoulder thickness t₂Ratio (t ₂/
t₁) Or head thickness t₃Shoulder thickness t₂Ratio
(T₂/ T₃) Is 1.10 or more, so that the panel
The strength around the shoulder 3 of the blade can be improved. Follow
To stabilize large shadow masks and aperture grills
Can be fixed. With the panel pin of the present invention
Is their ratio (t₂/ T₁, T₂/ T ₃) To 1.30
By doing the above, further around the shoulder 3 of the panel pin
Can be improved in strength.

In the panel pin of the present invention, the ratio (t ₂ / a) of the thickness t ₂ of the shoulder to the length a of the shoulder is 0.6.
It is preferred to be 5 or more. With 0.65 or more a thickness t ₂ of the shoulder of the shoulder portion relative to the length a, it is possible to improve the strength of the peripheral shoulder 3. Preferably the ratio of the thickness _{t 2} of the shoulder to the length a of the shoulder portion _(t 2 / a) 0.9
By setting it to 0 or more, it is possible to stably support a large shadow mask, an aperture grill, and the like.

Further, in the panel pin of the present invention, the skirt
Part thickness t₄Shoulder thickness t ₂Ratio (t₂/
t₄) Is preferably 1.10 or more. like this
Skirt thickness t₄Shoulder thickness t₂Ratio
(T₂/ T₄) Is 1.10 or more, so that the shoulder
3 Strength of the periphery can be improved.

The above-described panel pin of the present invention can be manufactured by, for example, a press working method or a cold forging method. Panel pins manufactured by the conventional pressing method tended to have insufficient mechanical properties such as strength and deformation resistance, but the panel pins of the present invention had sufficient strength and deformation resistance even when using the pressing method. Mechanical properties can be obtained. Further, the press working method is easier to work than the cold forging method. For this reason, in the present invention, it is particularly preferable to manufacture the panel pins by a press working method.

Although the composition of the panel pin of the present invention is not particularly limited, for example, 17 to 28% by mass of C
r, 0.01-0.6% by mass of Al, 0.1-0.6% by mass of Ti, and 0.01-0.6% by mass of Si, with the balance substantially consisting of Fe Are preferred. Hereinafter, the reason for adding each element will be described.

Cr is a component that lowers the thermal expansion of the Fe-based alloy and makes the coefficient of thermal expansion approximate the coefficient of thermal expansion of the special glass for a cathode ray tube, and its content is preferably in the range of 17 to 28% by mass. If the Cr content is out of the above range, the difference in the coefficient of thermal expansion from the special glass for a cathode ray tube constituting the panel becomes too large in any case, and the properties as a sealing part for the special glass for a cathode ray tube. Decrease. When the content of Cr exceeds 28% by mass, mechanical properties such as elongation also deteriorate. Cr is also a main component of the surface oxide film, whereby a surface oxide film having excellent wettability to glass can be obtained.

Al is a component for improving the adhesiveness between the surface oxide film and the panel pin body (metal portion), and its content is preferably in the range of 0.01 to 0.6% by mass. If the Al content is less than 0.01% by mass, the effect of improving the adhesion of the surface oxide film is low, while if it exceeds 0.6% by mass, workability may be reduced. Al
Is more preferably in the range of 0.3 to 0.6% by mass.

Further, Ti has a function of improving the adhesion between the surface oxide film and the panel pins (metal parts) and fixing harmful C and N, like Al.
The content is preferably in the range of 0.1 to 0.6% by mass. When the content of Ti is less than 0.1% by mass,
The effect of improving the adhesion of the surface oxide film is low.
If it exceeds 6% by mass, workability may be reduced.
More preferably, the content of Ti is in the range of 0.3 to 0.6% by mass.

Si is a component which forms an oxide layer mainly composed of SiO ₂ below the surface oxide film in the oxidation treatment, and enhances the adhesion between the surface oxide film and the panel pins (metal parts). The amount is preferably in the range of 0.01 to 0.6% by mass. When the content of Si is less than 0.01% by mass, the effect of improving the adhesion of the surface oxide film is low. On the other hand, when the content exceeds 0.6% by mass, workability may be reduced.

In the present invention, if necessary, Mn
Or a small amount of Ni or the like. These elements contribute to improving the workability of the sealed part, adjusting the thermal expansion characteristics, and the like. Further, since C and N may reduce the workability of the Fe—Cr alloy, the content of each of them is preferably less than 0.02% by mass.

Next, the cathode ray tube of the present invention will be described. FIG. 4 shows an example of an embodiment of the cathode ray tube of the present invention.
The cathode ray tube of the present invention has a vacuum envelope composed of a rectangular panel (face plate) 7, a funnel-shaped funnel 8, and a neck 9. Panel (face plate) 7
On the inner surface, red (R), green (G), and blue (B) light emitting phosphor layers 10 serving as three primary colors are formed in a stripe shape or a dot shape, and electron beams 11 corresponding to red, green, and blue are formed.
An electron gun 12 for injecting is provided inside the neck 9.

A shadow mask 13 having a large number of fine openings is disposed at a position close to and opposed to the phosphor layer 10, and a rectangular mask frame 13a is attached to the periphery thereof. Has an elastic holder 14 attached thereto. Shadow mask 13
Is fixed to the panel pin 1 of the present invention provided on the inner surface of the side wall 7 a of the panel 7 by locking the other end of the elastic holder 14.

The panel pin 1 is heated to a high temperature of, for example, 900 ° C. or more to form an oxide film on the pin surface, and then heated to a high temperature exceeding the working temperature of the glass used for the panel. By pushing the base end into a predetermined position on the side wall inner surface 7a of the glass panel 7,
As shown in FIG. 5, the panel 7 can be fused and fixed to the side wall 7a.

The panel pipe used in such a cathode ray tube is
The thickness of the support, t₁Shoulder thickness t₂of
Ratio (t₂/ T₁) Or head thickness t₃Shoulder thickness against
T ₂Ratio (t₂/ T₃) Is 1.10 or more, preferably
Use the one with 1.30 or more. Such a panel
To secure the shadow mask and aperture grille.
This causes the panel pins to deform due to these weights.
And fix them stably.
And the occurrence of color shift and the like can be suppressed.

As a panel pin used in a cathode ray tube, the ratio of the thickness t ₂ of the shoulder to the length a of the shoulder (t ₂₎
The ratio of / a) may be 0.65 or more. By fixing the shadow mask and aperture grille using such panel pins, the deformation of the panel pins due to their weight can be suppressed, and they can be fixed stably, thereby suppressing the occurrence of color shift and the like. can do.

Further, in such a panel pin, it is preferable that the ratio of the thickness t ₂ of the shoulder to the thickness t ₄ of the skirt (t ₂ / t ₄ ) is 1.10.
(T ₂ / t ₁ , t ₂ / t ₃ ) or (t
By defining ₂ / a), the strength can be improved, but by further defining (t ₂ / t ₄ ), a larger and heavier shadow mask or aperture grille can be stably fixed. be able to.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to embodiments. Examples 1 to 6 and Comparative Examples 1 to 4 An alloy plate made of an Fe-18% Cr-Ti alloy was prepared.
This was pressed to produce panel pins of Examples and Comparative Examples whose dimensions were as shown in Table 1.

In the embodiment of the present invention, the ratio of the thickness t ₂ of the shoulder to the thickness t ₁ of the support portion (t ₂ / t ₁ ) or the thickness t ₂ of the shoulder to the thickness t ₃ of the head is used. (T ₂ / t ₃ ) is 1.10 or more, or the ratio (t ₂ / a) of the thickness t ₂ of the shoulder to the length a of the shoulder (t ₂ / a) is 0.65 or more.

In Comparative Examples 1 to 3, the thickness t of the support portion
₁Shoulder thickness t₂Ratio (t ₂/ T₁) And head
Thickness t₃Shoulder thickness t₂Ratio (t₂/ T₃)
Is less than 1.10 and the thickness of the shoulder relative to the length a of the shoulder
t₂Ratio (t₂/ A) is less than 0.65
Was.

Further, Comparative Example 4 has the form shown in FIG. In FIG. 3, reference numeral 3a denotes an upper surface of the support portion, and 3b
Denotes the lower surface of the support portion, 5a denotes the upper surface of the head, 5b denotes the lower surface of the head, and the lower surface 5b of the head is the same height as the lower surface 3b of the shoulder. Even in such a case, the thickness t _{1 of the} support portion
The ratio of the thickness _{t 2} of the shoulder portion _(t 2 / _{t 1)} and the ratio of the thickness _{t 2} of the shoulder to the thickness _{t 3} of the head _(t 2 / _{t 3)} is less than 1.10 for, and shoulders Shoulder thickness t for section length a
The ratio of ₂ (t ₂ / a) was set to be less than 0.65.

[Table 1]

Next, these Examples 1 to 6 and Comparative Examples 1 to 4
The panel pins were subjected to an oxide film treatment using an oxidation furnace, and these panel pins were sealed to a glass panel for a cathode ray tube, and the sealing failure rate and pin proof stress were measured. Table 2 shows the results.

As shown in FIG. 6, the pin force was measured by compressing the head of the panel pin with a compression tester, and using the pressing force when the deformation amount after unloading was 0.01 mm as the pin strength. It was measured.

[Table 2]

As is clear from the results in Table 2, (t ₂ /
In the embodiment of the present invention in which t ₁ , t ₂ / t ₃ ) is 1.10 or more, or in the embodiment of the present invention in which (t ₂ / a) is 0.65 or more, the pin proof stress is high, and It was recognized that the rate of poor wearing was also kept low. In particular, (t ₂
/ T ₁ , t ₂ / t ₃ ) is 1.10 or more,
In Example 4 in which (t ₂ / a) was set to 0.65 or more, it was recognized that a high pin proof stress could be obtained.

On the other hand, (t ₂ / t ₁ , t ₂ /
In Comparative Examples 1 to 3, in which (t ₃ ) and (t ₂ / a) were out of the range of the present invention, although the sealing failure rate was suppressed to a low level, the pin proof stress was clear as compared with the examples of the present invention. Was found to be inferior. In Comparative Example 4, although the pin yield strength was high,
It was recognized that the sealing failure rate also increased.

[0051]

According to the present invention, the thickness of the support portion of the panel pin is
t₁Shoulder thickness t₂Ratio (t ₂/ T₁) Or head
Part thickness t₃Shoulder thickness t₂Ratio (t₂/
t₃) Is 1.10 or more, so that the panel pin
The strength of the shoulder and the support can be improved. Also,
In the present invention, the shoulder thickness t with respect to the shoulder length a₂Ratio
(T₂/ A) is 0.65 or more, so that the panel
The strength of the shoulder and the support of the pin can be improved.

In the present invention, the panel pins are used for holding a shadow mask and an aperture grill disposed in the cathode ray tube, thereby preventing the panel pins from being displaced due to the deformation of the panel pins and suppressing the occurrence of a problem such as color misregistration. can do.

[Brief description of the drawings]

FIG. 1 is an external view showing a panel pin of the present invention.

FIG. 2 is a sectional view showing a panel pin of the present invention.

FIG. 3 is a sectional view showing a panel pin of Comparative Example 4.

FIG. 4 is a sectional view showing a cathode ray tube of the present invention.

FIG. 5 is an enlarged cross-sectional view showing the vicinity of a mask frame fixing portion in FIG. 4;

FIG. 6 is a schematic diagram showing a method for measuring a pin proof stress.

FIG. 7 is a sectional view showing a general cathode ray tube.

FIG. 8 is an enlarged sectional view showing the vicinity of a mask frame fixing portion in FIG. 7;

[Explanation of symbols]

1 ... thickness of the panel pin 2 ... skirt 3 ... of the shoulder portion 4 ... support 5 ... thickness t 3 _... the head of the thickness t 2 _... shoulder of the head t 1 _... support section thickness t 4 _... skirt A ... the length of the shoulder

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoshi Nagasaki 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Inside Toshiba Yokohama Office (72) Inventor Kazuya Tsujimoto 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa (72) Inventor Shoichi Shirahama 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Inside (72) Inventor Hajime Makio Hajime Makio 2-7-1 Hararashi, Otsu-shi, Shiga Prefecture Nippon Electric (72) Inventor Akira Imamura 2-7-1 Hararashi, Otsu-shi, Shiga Prefecture Nippon Electric Glass Co., Ltd. (72) Inventor Sakuzo Yamada 2-7-1 Hararashi, Otsu-shi, Shiga Prefecture Nippon Electric F-Term (in reference) 5C031 BB02

Claims (11)

[Claims] 1. A panel pin sealed to a cathode ray tube panel for holding a shadow mask or an aperture grill, wherein a ratio (t ₂ / t ₂₎ of a thickness t ₂ of a shoulder portion to a thickness t ₁ of a support portion.
t ₁ ) or a ratio of the thickness t ₂ of the shoulder to the thickness t _{3 of the} head (t ₂ / t ₃ ) is 1.10. 2. A panel pin sealed to a cathode ray tube panel for holding a shadow mask or an aperture grill, wherein a ratio of a shoulder thickness t ₂ to a shoulder length a (t ₂ / a).
Is 0.65 or more. 3. The panel pin according to claim 1, wherein the ratio (t ₂ / t ₄ ) of the thickness t ₂ of the shoulder portion to the thickness t ₄ of the skirt portion is 1.10 or more. 4. The panel pin according to claim 1, wherein the ratio (t ₂ / a) of the thickness t ₂ of the shoulder to the length a of the shoulder is 0.65 or more. 5. The panel pin according to claim 1, wherein the panel pin is manufactured by pressing a metal plate. 6. In a glass panel for a cathode ray tube, a base end portion is fusion-welded to an inner surface of the panel of the cathode ray tube, and a front end portion is joined to a peripheral portion of a shadow mask or an aperture grille to fix the shadow mask or the aperture grille. comprising a panel pin for fixing the position of the thickness of the shoulder portion relative to the ratio (t 2 _{/ t 1)} or the thickness t ₃ of the head of the shoulder thickness t ₂ to the thickness t ₁ of the support portion of the panel pin CRT glass panels, wherein the ratio of _{t 2 (t 2 / t 3} ) is 1.10 or more. 7. A glass panel for a cathode ray tube, wherein a base end portion is fusion-welded to an inner surface of the panel of the cathode ray tube, and a front end portion is joined to a peripheral edge portion of a shadow mask or an aperture grille, thereby fixing the shadow mask or the aperture grille. And a thickness t ₂ of the shoulder with respect to the shoulder length a of the panel pin.
Wherein the ratio (t ₂ / a) is 0.65 or more. 8. The panel pin according to claim 6, wherein the panel pin is formed by pressing a metal plate.
Or a glass panel for a cathode ray tube according to 7. 9. A vacuum envelope having a panel, a phosphor layer provided on the inner surface of the panel, an electron gun arranged at a position facing the panel of the vacuum envelope, and the phosphor layer A shadow mask or aperture grill disposed between the electron gun and a base end portion fused to the inner surface of the panel of the cathode ray tube, and a tip end portion joined to a peripheral portion of the shadow mask or aperture grille; A panel pin for fixing the shadow mask or the aperture grille at a predetermined position, and a ratio (t ₂ / t ₁ ) of the thickness t ₂ of the shoulder to the thickness t ₁ of the supporting portion of the panel pin (t ₂ / t ₁ ) or the thickness of the head. cathode ray tube, wherein the ratio of the thickness _{t 2} of the shoulder relative to _{t 3 (t 2 / t 3} ) is 1.10 or more. 10. A vacuum envelope having a panel, a phosphor layer provided on an inner surface of the panel, an electron gun arranged at a position facing the panel of the vacuum envelope, and the phosphor layer. A shadow mask or aperture grill disposed between the electron gun and a base end portion fused to a panel inner surface of the cathode ray tube, and a tip end portion joined to a peripheral edge portion of the shadow mask or aperture grille; A panel pin for fixing the shadow mask or the aperture grille in a predetermined position, and a shoulder thickness t _{2 with} respect to a shoulder length a of the panel pin.
Wherein the ratio (t ₂ / a) is 0.65 or more. 11. The cathode ray tube according to claim 9, wherein said panel pin is manufactured by pressing a metal plate.