JPS62268039A - Color cathode ray tube - Google Patents

Abstract

PURPOSE:To enable a sure return of a color selection means to a specified position when a shock is eliminated by providing a protrusion and a recess mutually linked to the top surface of a stub pin and the base of a cap, and coating them with solid lubricants to reduce their frictional resistance even in an intense vacuum. CONSTITUTION:A protrusion 22 and a recess 23 are arranged on the respective centers of the top surface 15a of a stud pin 15 and the oppositely positioned base 21a of the cap 21. Then, the so called solid lubricant films 32 and 33 such as gold, silver and boron nitride are applied at least to parts where mutually linked protrusion 22 and the concave 23 make mutual contact. Therefore, when a large external shock is applied, contact between the inner surface or the opened inner peripheral edge of the cap 21 and the outer peripheral surface of the stub pin 15 is made across relatively a large area, and their sliding contact part is made with small frictional resistance since the contact parts are coated with solid lubricants. Accordingly, rocking or movement of the linked parts are smoothened, and their linked state returns to its original position after the external force is eliminated.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is directed to a color phosphor surface in which an electron beam is directed to form a phosphor pattern of a predetermined color on a color phosphor surface. The present invention relates to a color cathode ray tube equipped with a color selection means for landing on the top.

[Summary of the invention]

In the case where the color sorting means is attached to the panel part of a color cathode ray tube body by engagement of a leaf spring and a stud pin, the temporary spring is provided with a cap part that covers the stud pin, and the stud pin is In addition, a protrusion and a recess that engage with the bottom surface of the cap part are provided, and the mutually contacting parts are coated with a solid lubricant such as gold, 1M, or boron nitride. There are no more than five steps in the manufacturing process of cathode ray tubes, and even when a finished tube is in the air, the frictional resistance of one person can be reduced even when the tube is in the air. When the impact is removed, the color sorting means can be reliably returned to its predetermined position, and the protrusion vj
, f members can be avoided.

[Conventional technology]

In a color cathode ray tube, as shown in Figure 6, the panel part of the cathode ray tube body has a color fluorescent surface formed on its inner surface (
1), a color selection means (2) such as a shadow mask or an aperture grill is arranged. For example, as shown in FIG.
a) is a metal formed in an array ′? #A color selection electrode (3) consisting of a slope consists of, for example, an aperture grill stretched over the frame (4). Frame (4) consists of a pair of opposing frame sides (4^) and (4B) and these frame sides (4^) and (
4B) A pair of arms (4C) and (4
D), and a color selection electrode (3) is stretched between the frame sides (48) and (4B).

Attachment of the color sorting means (2) to the panel part +11 is as follows:
Usually, this color selection means (2) is formed by optically printing a phosphor pattern of each color as an optical mask, so it needs to be removable and reproducible at a predetermined position. After the cathode ray tube has been completed, it may be exposed to external shocks such as 11+fJ during transportation or careless handling! When j is obtained, it is necessary to be able to attribute it to a predetermined position i.

For example, as disclosed in Japanese Utility Model Publication No. 53-20227, the color sorting means (2) can be attached to the panel part (11) using a stand button (5) and a handling spring (6). For example, the frame (
The opposing arms (4C) and (4D) of 4) and the frame side (
4B), one end of the leaf spring (6) was welded to each of the springs (6), and a frit was attached to the inner surface of the panel part (1) in the through hole (7) bored at the free end of each spring (6). By fitting the stat bin (5), the temperature can be detached and held in a predetermined position.

The stud pin (5) has a truncated conical shape made of ceramic, for example, and the through hole (7) of the leaf spring (6) is formed around the stud pin (5) as shown in FIGS. 8 and 9. A stud pin (5) and a through hole (7) are selected to have a circular shape with three sides (7A) (7B) (7C) circumscribing the surface.
The inner peripheral edge of is each point P^ on each side (7^) (7B) (7C).

Point contact is made at three points, PR and Pc, for 40 positions.

In the case of such a configuration, as cathode ray tubes have become larger as in recent years, and the color selection means (2) has accordingly become larger and larger, reliability problems arise. In other words, with this configuration, when a large impact is applied from the outside, the stud bin (5) and the slope spring (6)
), but even after this shock is removed, the mating positions on both fronts cannot return to the stable state before this shock was applied, and the position shifts. will remain and become "C".This will be explained further.For example, in FIG.
Considering the case where the stud pin (5) is tilted about a line passing through the center axis 0 of the stud pin (5), if the stud pin (5) has a conical shape at other contact points P^ and PR, At the point P^ or PR where the movement of the stud pin (5) occurs, the stud pin (5)
If is cylindrical with uniform diameter in each part, both points PA and P
At R, a localized impact will occur. and,
In this case, especially as mentioned above, when the color sorting means (2) becomes larger and the number of vehicles increases, the stud pins (5)
As the diameter of the stud pin (5) increases, the distance from the center axis O of the stud pin (5) to the point P^ or PR increases, and the moment increases. l! ! Since the force also becomes larger, the above-mentioned local impact becomes larger, and the friction at the contact point PA or (and) Pc between the stud bottle (5) and the through hole (7) of the handling spring (6) becomes larger. becomes. Therefore, in this case, even after the external impact force is released, the inclination of the handling spring (6) is not eliminated due to this friction.
Also, even if this slope is eliminated, 1, the local i! The inner circumferential edge of the through hole (7) of the slope spring (6) is abraded or damaged due to the I impact, causing a change in shape, causing the through hole fL (
7) may not be able to return to its original state and position before the impact is applied.

In this way, if a misalignment occurs in the fitted state between the through hole (7) of the leaf spring (6) and the stud bottle (5), the color selection means (2) and the color fluorescent surface This results in a positional shift in the relative relationship, leading to inconveniences such as mislanding, that is, color misalignment.

[Problem that the invention seeks to solve]

The present invention provides a color cathode ray tube that can avoid the disadvantages of the conventional configuration in which the color selection means is supported by engagement between a stud bin and a handling spring.

[Means for solving problems]

In the present invention, FIG.
3 shows a plan view of the engagement portion between the stud pin and the leaf spring, and FIG. 3 shows a sectional view taken along the line A-A in FIG.
Attach a stand bin (15) for positioning to either the panel part of the color cathode ray tube body (11, the mounting part of the color sorting means, or the frame (4) of the color sorting means (2)) with a frit. and put this stand bottle (15) on the other side.
A slope spring (16) is provided which engages with the spring. This handling spring (16
) is provided with a cap part (21) that covers the top of the stud pin (15) at the engaging part with the stud pin (15). Then ζ, the top surface (15a) of the stud pin (15) and the bottom surface (21a) of the cap part (21) facing the dirt
A protrusion (22) is provided on either one of the axes, and four parts (23) are provided that are engaged with the 'ζ protrusion (22) in a direction intersecting the acting direction of the spring (16). . The protrusion (22) and the recess (23) each have a river fish shape on their central axis so that they each have a stable point of engagement on their central axis. And this bond state your cap? A gap g is created between the JI9 (21) and the stud pin (15), so that the slope spring (16) is engaged with the protrusion (22) and the recess (23) with respect to the stud pin (15). Slightly 1:δ with the joint as a fulcrum, a protrusion (22
) can move up to the periphery of the fourth part (23). In this way, when such rocking or movement occurs due to impact etc., the circumferential surface of the stand bottle (15) and the inner circumferential surface of the cap part (21) or the inner circumferential edge of the opening may come into contact with each other due to surface or line contact. Make it collide.

In the present invention, as shown in FIG. 3, h,
Metal is applied to at least the contact portions of the protrusion (22) and the recess (23) that engage with each other, that is, the contact portions including the normal engagement position and the mutual sliding contact portions during rocking. Au, J
k! So-called solids such as Ag and poron nitride/r
J1m material? )lBe (32) (33) wo:'?
-G 1-6゜[Function] Also in the configuration of the present invention, the panel portion (
1), use the handling spring (16) and stud pin (1).
5), so it can be attached and detached freely, and the connection can be loosely sealed by the elasticity of the slope spring (16). .

The position of the color sorting means (2) on the panel part (1) is set by the engagement of the stud pin (15) with the protrusion (22) and recess (23) of the photographing spring (16). When a large impact is applied from the outside without support,
The handling spring (16) swings with respect to the stud pin (15) using the engagement part between the protrusion (22) and the fourth part (23) as a fulcrum, or the protrusion (22) swings against the stud pin (15). The cap portion (21
) or the inner periphery of the opening and the stud pin (15)
The stud pin (15) and the spring (16) abut against each other over a relatively large area and receive a large impact from the outside mainly at this abutment area.
) can solve the aforementioned problems caused by local impact. Furthermore, in the configuration of the present invention, since the solid lubricant coatings (32) and (33) are coated on the mutually contacting portions of the projection (22) and the four parts (23), the sliding contact between the two can be made with small frictional resistance. By doing so, even when a large impact is applied from the outside, the above-mentioned rocking or movement of the engaging portion occurs smoothly, and after the external force is removed, both are securely in the locked state. You can do it every time you return to . In other words, as is well known, the friction in a vacuum is much greater than that in air, so when the inside of the tube is maintained at commercial vacuum, as in a completed cathode ray tube, The aforementioned protrusion (22) and recess (
Even if the material in 23) is composed of a combination of ceramics or a combination of ceramic and metal, which have a relatively small coefficient of friction in air, under the commercial air pressure inside the completed pipe,
Since the friction becomes large, the protrusion (2
2) and the recess (23), due to the large PJ friction resistance between the two, the protrusion (2)
2) may be damaged or the engaged position of both may not be able to be restored to the normal position, but as described above, in the present invention, the mutual contact portion between the protrusion (22) and the recess (23) solid / 11 lubricant covering 119 (32) and (33
), such inconveniences can be avoided.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the present invention will now be described in detail with reference to FIGS. 1 to 3. This example is applied to a color cathode ray tube having an aperture grill type color selection means (2), and in FIGS. 1 to 3, parts corresponding to those in FIGS. 6 to 9 are given the same reference numerals. attach That is, in this case as well, as explained in FIGS. 6 to 9, an aperture grill, that is, a color selection screen is provided in the panel section (1) of the cathode ray tube body, which has a color fluorescent surface formed on its inner surface. Means (2) are arranged. This color selection means (2) consists of a color selection electrode (3) made of a thin metal plate in which slit-shaped electron beam transmission apertures (3a) extending vertically are arranged in a frame (4) as described above. ), for example, an aperture grille. The frame (4) includes a pair of opposing frame sides (48) and (4B) and a pair of arm portions (4C) and (4C) and (4B) disposed across these frame sides (48) and (4B). 40), and a color selection electrode (3) is stretched between the frame sides (48) and (4B).

In this example, slope springs (16
), and the free ends of each of these leaf springs (16) are engaged with stud pins (15) fritted on the inner surface of the panel part (1), so that they can be attached and detached freely and held in a predetermined position. hold it.

The stud pin (15) is attached to the valve ring part (
It is made of a ceramic such as holsterite or a metal such as 426 alloy, which has a thermal expansion coefficient similar to that of glass No. 11, and has a cylindrical shape or a cylindrical shape with a bottom. A cap portion (21) that covers the stud pin (15) is provided at the free end of the leaf spring (16). This cap portion (21) can be formed integrally with the leaf spring (16) by a drawing process, but as shown in FIG.
A pressed metal cap is made of stainless steel 304, for example, and has a flange part (21b) formed separately from the flange part (21b), and this is inserted into the through hole (24) bored at the free end of the slope spring (16). It is also possible, for example, to weld the flange part (21b) to the leaf spring (16) made of SUS 610.

On the central axis of the top surface (15a) of the stud pin (5), for example, a projection (22) is provided integrally with the stand bottle (15) at the same time as it is molded.

On the other hand, a recess (23) into which the protrusion (22) is inserted is provided on the central axis of the bottom 1ij (21a) of the cap part (21). This fourth part (23) is the bottom surface (
The cap part (21a) itself can be formed by press working or the like, but as shown in FIG.
34) and press fit the four parts (23) into the center of this seat plate (34).
) can also be formed.

In this case, the cap part (21) into which the seat & (34) is press-fitted
One or more ventilation holes (35) are drilled into the bottom & (21c).

In particular, in the present invention, "ζ" is the above-mentioned protrusion (22
) and the recess (23) are coated with a solid material such as Au, Ag, or boron nitride (32) and (33).
) to coat. The constituent material of the protrusion (22) and the fourth part (23), if the constituent material of the stud pin (15) and the seat plate (34) is a ceramic such as holsterite or alumina, in the diagram (?11), friso (・Apply a type of gold or silver paste to the surface of each protrusion (22) and the recess (
23) and baking at 800 to 900° C., solid lubricant coatings (32) and (33) of 15 to 20 μm in diameter can be formed.

Moreover, when the constituent material of the protrusion (22) and the recess (23) is metal, the members M (32) and (33) can be formed by electroplating.

These protrusions (22) and the four parts (23) are provided with protrusions (23) on their respective axes so as to stably engage with each other on the respective axes of the stand bottle (15) and the cap part (21). 22
) and each m point of the recess (23) are located. The shapes of these projections (22) and recesses (23) can take various shapes. For example, the protrusion (22
) is spherical, and the recess (23) is, for example, conical. When the height of the stud pin (15) (excluding the height of the protrusion (22) is 11 mm) is, for example, 6 mm and the diameter is 13 mm, the spherical protrusion (22) has a hemispherical shape with a radius of 2.6 mm, for example. In other words, the quotient of the protrusion (22) is selected to be 1.3fl,
The depth of the triangular pyramid-shaped recess (23) is 1.5u, and the opening diameter is 3.5mm. Qlm can be selected.

Further, in this case, the stud bottle (15) is configured to enter into the cap portion (21) from its top surface, that is, to a depth of about two cranes, not including the curvature of the protrusion (22),
Gap between cap part (21) and stand bottle (15) g
can be selected to be approximately 0.5 mm under normal conditions.

Furthermore, the protrusion (22) is not limited to a spherical shape, but can take various shapes such as a parabolic shape, and the recess (23) may also have a gently expanding spherical or conical shape, for example, as shown in FIG. 4A. or as shown in Figure 4B,
Various shapes can be adopted, such as a curved surface corresponding to the curved surface of the protrusion (22), but in any case, the stud pin (15) and the root spring (16)
5) and the cap portion (21) are displaced into a substantially parallel relationship, the protrusion (22) is shaped to rise toward the opening edge of the recess (23).

In the illustrated example, the root spring (16) and the statbin (15)
However, the arrangement is not limited to this arrangement; rather, for large pipes, there are two locations on each side of the upper and lower sides of the frame (4), as shown in Figure 5. One leaf spring (16) and two
5) is desirable.

Furthermore, in the above example, the handling spring (16) is attached to the frame (4) and the stud pin (15) is provided on the panel part (1) side, but the stud pin (16) is attached to the frame (4).
5) and a leaf spring (16) disposed on the panel side.

Further, the present invention is not limited to the case where it is applicable to a color cathode ray tube having an aperture grill-type color selection means (2) as in the above example, but also having various color selection means (2) such as a shadow mask. Can be used with color cathode ray tubes.

〔Effect of the invention〕

As described above, in the present invention, the color sorting means (2) is
It is attached to the panel part (11), but as mentioned above, its positioning is done by the protrusion (22) and the recess (23).
By local, so to speak, point support by consolidating with
The action of a force such as an impact is caused by the relative contact between the inner peripheral surface of the knob part (21) or the inner peripheral edge of the opening of the other part and the surface contact or line contact with the peripheral surface of the protrusion (22). Since the impact is applied over a wide area, it is possible to avoid the inconvenience of localized impact being applied to the stud pin. In addition, in the present invention, IQ (32) and (33) of a solid lubricant such as 8U, Ag, or poron nitride are formed at the mutual contact portions of the protrusion (22) and the recess (23). Therefore, even at la + degree of vacuum), the protrusion (2
2) and the recess (23) can be engaged with each other with low friction, allowing smooth relative rocking or movement between the protrusion (22) and the four parts (23), and preventing large external shocks. In this case, it is possible to avoid the inconvenience of causing damage to the protrusion (22) due to the frictional resistance between the two. In addition, this damage can be avoided (there is no need to increase the strength by increasing the diameter of the protrusion (22), and damage to point support caused by increasing the diameter of the protrusion (22) can be avoided.
By reducing the friction between 2) and the fourth part (23), it is possible to smoothly return to the original position when the person is moved relatively due to an external impact.
It is possible to avoid an error in the positional relationship between the color selection means (2) and the fluorescent surface that would occur if the return to the original position is inhibited. Therefore, position setting can be performed reliably, and I! ! ! A highly reliable color cathode ray tube can be obtained by reliably avoiding deterioration in i quality.

Further, in the present invention, the protrusion (22) and the recess (23)
A solid ifl lubricant coating (32) and (
33) by 1 va, the friction between the two members is reduced by 1 va. The constituent materials of (34) are:
Without considering the 2E coefficient of friction, it is said that frits during manufacturing of cathode ray tubes can withstand high temperature heating during manufacturing processes.
For example, when adopting a configuration in which the star 7 dobbin (15) is attached to the panel part (1), various conditions such as selecting ceramic or metal whose thermal expansion is similar to that of the glass material of the panel part (1) are satisfied. be able to.

As mentioned above, there is a seat plate (3) inside the cap part (21).
4) When adopting a configuration in which the key t'-/
When making a ventilation hole (35) at the bottom of the cap part (21) & (21c), insert the seat plate (34) inside the cap part (21).
When press-fitting, this seat & (34) and cap part (2
1), which may prevent the seat plate (34) from being press-fitted into the cap part (21), or the air remaining in the cap part (21) may enter the pipe after the wire pipe is completed. This has the effect of avoiding inconveniences such as reducing the degree of vacuum inside the tube and shortening its life.

[Brief explanation of drawings]

1 and 5 are rear views of the mounting portion of the color sorting means of an example of the color cathode ray tube according to the present invention, and 2.nu.1 and 3.nu. The figure is a 1σr plane view on line A-A in Figure 2, Figures 4A and B are 1tjr blood diagrams on each side of the engagement part between the protrusion and the four parts, and Figure 6
is f? of the mounting part of the conventional color sorting means? Figure 7 is a perspective view 1 of the color sorting means, Figure 8 is a plan view of the engagement portion between the stand bin and the root spring, and Figure 9 1 is A of Figure 8.
- It is a sectional view on the A line. (11 is the panel part, (2) is the color selection means, (3) is the color selection electrode, (15) is the stud bottle, (15a) is the top surface, (16) is the slope spring, (21) is the cap part , (21
a) is the bottom surface, (21C) is the bottom plate, (22) is the protrusion, (23) is the four parts, (32) and (33) are the solid lubricant coating, and (35) is the vent hole.

Claims (1)

[Claims] A positioning stud pin is attached to one of the mounting portion of the color selection means of the panel portion of the color cathode ray tube body and the frame of the color selection means, and a leaf spring that engages with the stud pin is provided on the other side. , a cap portion that covers the top of the stud pin is provided at the engagement portion of the leaf spring with the stud pin, and either the top surface of the stud pin or the bottom surface of the cap portion opposite thereto is provided with a cap portion that covers the top of the stud pin; Protrusions are provided,
A color cathode ray tube characterized in that the other side is provided with a recess that engages with the protrusion in a direction intersecting with the direction of action of the leaf spring, and a solid lubricant is coated on a contact portion between the protrusion and the recess.