JPS6334839A - Color cathode-ray tube - Google Patents

Abstract

PURPOSE:To prevent securely a shake of a color selection electrode and a shake of an electron beam permeation aperture owing to the speaker vibration and the like, and to obtain an image of a high quality, by providing a reinforcement plate with thermal expansion rate same as the frame of a color selection device at the said frame. CONSTITUTION:At the frame 4 of a color selection device 2, a reinforcement plate 60 with the thermal expansion rate same as the frame 4 is provided. Therefore, the spring constant of the frame 4 related with springs 161 and 162 can be selected at a high degree of freedom, and consequently, the degree of freedom of selecting the spring constant of the springs 161 and 162 is also increased. As a result, a shake of a color selecting electrode 3, owing to the vibration of the speaker and the like, that is, the shake of the electron beam permeation aperture 3a, can be prevented, as well as a mislanding can be prevented securely. Therefore, a high quality of image can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a color selection means that faces a color phosphor surface and lands an electron beam on a phosphor pattern of a predetermined color on the color phosphor surface. The present invention relates to a color cathode ray tube comprising:

[Summary of the invention]

In the present invention, in a configuration in which the color sorting means is attached to a panel portion of a tube body via a spring, the spring constant of the frame is increased by providing a reinforcing plate on the side surface of the frame of the color sorting means, and the spring constant of the spring is increased. To avoid vibration of a color sorting means and to surely perform operations such as bar hide adjustment according to a temperature rise of the color sorting means by making it possible to select a required size in consideration.

[Prior Art] In a color cathode ray tube, as shown in FIG. Color selection means (2), such as an aperture grill, is arranged in which slit-shaped electron beam transmission apertures are arranged.As shown in FIG. A slit-shaped electron beam transmission aperture (3a
) Color selection electrode (3) made of a thin metal plate with an array of
is stretched on a frame (4). Frame (4)
is the opposing pair 0:)R-sides (4A) and (4B) and the pair of arms (4C) and (4D) disposed across these frame sides (4A) and (4B). Color selection electrodes (3) are attached at both ends of the slit-shaped opening (3a) between the frame sides (48) and (4B) and stretched with the required tension.

Attaching the color sorting means (2) to the panel part (1) 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 must be able to return to its predetermined position even if it is subjected to an external shock.For this reason, this color selection means (2 )
The spring (6) consists of a support pin, a so-called stud pin (5) attached to the peripheral side wall (1s) of the panel part (1), and a leaf spring provided on the frame (4) of the means (2).
). For example, frame (4)
The opposing arms (4C) and (4D) and the frame side (4B
), one end of the spring (6) is welded to each of the springs (6), and a stand bottle (1) fritted on the inner surface of the panel portion (1) is inserted into the through hole (7) bored at the free end of each spring (6). 5) is fitted to allow it to be detachably attached and held in a predetermined position.

The support bottle (5) has a truncated cone shape made of ceramic, for example, and the through hole (7) of the spring (6) is formed on the circumferential surface of the stud bottle (5) as shown in FIGS. 11 and 12. The inner shape is selected to have three sides (7A) (7B) (7C) circumscribing the stud bottle (5) and the through hole (
7) and the inner peripheral edge of each side (7A) (7B) (7C
) at each point P8.

Point contact is made at three points PB and Pc, and the engagement position between the stand pin (5) and the spring (6) is set.

However, as mentioned above, as a color cathode ray tube, its color selection electrode has a slit-shaped electron beam transmission aperture (3a).
When adopting a configuration in which the electrodes are arranged extending in one direction (hereinafter referred to as the Y direction), the color selection electrode (3) vibrates due to the transmission of external imaging such as vibration sound from a speaker. , "shaking" may occur in the electron beam transmission aperture (3a), leading to a decrease in image quality.

Conventionally, in the color selection electrode (3), the strength of the frame (4) is increased and the supporting tension of the electrode (3) is increased to steepen the attenuation characteristic of this imaging and reduce the influence of imaging. We are trying to change the world.

Furthermore, in the color cathode ray tube equipped with this color selection means (2), during operation, the electron beam passage is restricted by the color selection electrode (3), and the electron beam transmission aperture (3a)
As the electrons cannot pass through the electron beam and collide with the electrode (3) itself, the temperature of the color selection means (2) rises to a considerably high temperature, and the color selection electrode (3) thermally expands. An error occurs in the landing position. This will be explained with reference to FIG. 13. Now, one electron beam (8) for the color (for example, red) passes through the front surface (if )
Let us consider the case where the color phosphor surface (9) is arranged to land on a corresponding stripe-shaped red phosphor pattern (9R), for example. In this case, for example, if the electron beam (8) is arranged to land exactly on the phosphor pattern (9R) through the electron beam transmission aperture (3a) of the color selection electrode (3) at room temperature, then the above-mentioned When the cathode ray tube is operated, the temperature of the color selection means increases and thermally expands, so that the electron beam transmission aperture (3a) moves in the horizontal direction indicated by the arrows (lla) and (llb) as shown by the dashed line in FIG. , the landing position of the electron beam on the phosphor surface (9) will land on a phosphor pattern of another color that is shifted from the original pattern (9R), as shown by the chain arrow. Color shift occurs. This phenomenon is particularly noticeable at the periphery of the screen where the amount of movement due to thermal expansion is large. In order to avoid such inconvenience, the distance between the electrode (3) and the fluorescent surface (9) should be adjusted according to the thermal expansion of the electrode (3) as shown by the broken line in the figure.
If the so-called bar hide moves from the initial bar high + - h to the required small bar hide h2 according to thermal expansion, that is, temperature rise, no movement will occur in the landing position on the fluorescent surface (9). You can do it like this.

Conventionally, as the temperature rises, the distance from the fluorescent surface,
In other words, as a method of changing barhide, in the configuration explained in FIG. There is a method of adjusting the interval.

However, in this case, since changes in the ambient temperature and changes in the temperature of the electrode (3) are not detected separately, even if the ambient temperature changes, in other words, the fluorescent surface (9) of the electrode (3) Even if there is almost no change in the relative position with respect to the fluorescent surface, there is a problem in that the distance between the fluorescent surface and the fluorescent surface may change indiscriminately, causing color shift.

[Problem that the invention seeks to solve]

The present invention effectively avoids the occurrence of vibration of the color selection electrode (3) due to external vibration such as speaker vibration, thereby solving the problem of vibration of the electron beam transmission aperture (3a), Furthermore, when a configuration is adopted to solve the problem of mislanding caused by the temperature rise of the color selection means (2) mentioned above, the function can be performed reliably.

That is, the present applicant believes that the "swaying" of the color selection electrode due to external vibrations, and therefore the "swinging" of the electron beam transmission aperture, is based on the elastic deformation vibration of the frame of the color selection electrode due to external vibrations. By investigating this, we determined the relationship between the spring constant of the spring that attaches this color selection electrode to the cathode ray tube panel and that of the frame, and developed a color cathode ray tube that solved the problem of fluctuation of the electron beam transmission aperture. was previously provided in Japanese Patent Application No. 11829/1982. Similarly, the present applicant has developed a system in which the bar hide is automatically adjusted as the temperature of the color selection electrode increases, thereby preventing the occurrence of mislanding.
Similarly, Japanese Patent Application No. 60-291434 provided a color cathode ray tube having a special function in connection with a spring for attaching a color selection electrode to a panel portion of a tube body.

For example, in each of these color cathode ray tubes, the present invention further provides respective functions, namely, prevention of fluctuation of the electron beam passage aperture and adjustment of the bar hide according to temperature rise.
To be able to do this more reliably.

[Means for solving problems]

As shown in FIGS. 1 to 3, the present invention provides a color fluorescent surface (9) formed within a panel section (1) of a cathode ray tube body, on the inner surface of the panel section (1). A color selection means (2) is mounted oppositely through springs (161) and (162), and the color selection means (2) is made of a thin metal plate in which electron beam transmission apertures are arranged and perforated. In a color cathode ray tube in which the selection electrode (3) is stretched over a frame (4), the side surface of the frame has a coefficient of thermal expansion equivalent to that of the frame, and its width is equal to the depth of this side surface of the frame. Reinforcement board (60) selected to be larger than the width
The spring constant of the frame (4) is adjusted taking into account the relationship with the spring constant of the springs (161) and (162).

The color sorting means (2) includes, for example, a large number of slit-shaped slits along the Y direction intersecting the frame sides (4A) and (4B) between the opposing frame sides (4A) and (4B) of the frame (4). A color selection electrode (3) made of a thin metal plate in which an electron beam transmission aperture (3a) is formed is stretched.

Pairs of springs (161) and (162) are attached to opposing frame sides (4^) and (4B) of the frame (4), respectively.
). Each pair of springs (161) and (16
2) are arranged in symmetrical positions with respect to the center (longitudinal center position) on each frame side (4A) and (4B), and the other pairs of springs are arranged on each frame side (4A) and (4B). Place it symmetrically about the center. In addition, these two pairs of springs (161) and (162)
are each pair of stand pins (151) and (15) disposed at corresponding positions on the peripheral side wall (1s) of the panel portion (1), respectively.
2) to attach the color sorting means (2) to the panel part (1). And these springs (161) and (
162) spring force (restoring force) is applied to the frame (4).
It is specified in relation to the spring force of

That is, now the slit-shaped electron beam transmission aperture (3a)
As mentioned above, the extension direction is the Y direction, and the tube axis direction is the Z direction.
direction, and the direction perpendicular to these Y directions and the two directions is
In the direction, each spring (161) and (162)
fixed points S1 and S2 for each frame side (4A) and (4B), and springs (161) and (16) for each of these pairs.
2) X, Y, Z between each engagement point R work and R2
The spring constant in each direction (that is, the magnitude of the load required to give a unit deformation) is determined by the fixing point of the adjacent springs (161) and (162) in the frame (4),
That is, each frame edge (4) of the pair of springs (161) and (162) on each common frame edge (4A) and (4B)
8) and (4B) between anchoring points S1 and 32 are sufficiently smaller than similar spring constants in the frame for similar X, Y and Z directions, and S2 and R, respectively.
Each spring force (restoring force) in the X, Y, and Z directions between 2 and X between each point S1 and 82 on the frame sides (4A) and (4B) of the frame (4).

The spring force is made weaker than each spring force in the Y and two directions.

In this case, these springs (161) and (162)
In practice, for example, a frame made of iron (4) has a large weight.
The above-mentioned spring constant of the frame (4) is actually quite large since it itself requires a large spring constant in order to support the means (2) containing the frame (4).

In the present invention, the spring constant of the frame (4), for example, a large spring constant at the frame sides (4A) and (4B), is obtained by bonding reinforcing plates (60) to the sides thereof.

In addition, in the above-mentioned structure, regarding the spring constant in the Y direction, the upper and lower frame sides (4A) and (4B) of the frame (4) and the upper and lower surfaces of the peripheral side wall (1s) of the panel part (1) opposing thereto When the springs (161) and (162) are arranged between the springs (161'I and (162)
) is the Y direction, so each point S1 of each pair of springs (161) and (162')
and R1, and between S2 and R2, the opposing springs (161) and (161'') on the pond frame sides (4A) and (4B), (
162'') and (162) between each fixed point S1 and S□,
The spring constant in the Y direction in the frame (4) between S2 and S32 is selected to be sufficiently small even without the reinforcement effect of the reinforcing plate (60), as in the normal case.

[Effect]

According to the above-described configuration, the spring (
161) and (162) are attached to the frame side (4A
) and (4B), the spring constant of the reinforcing plates (60) of these frame sides (4A) and (4B) in the plate surface direction can be increased.

Therefore, the color sorting means (2) is connected to each pair of springs (1
61) and (162) to the panel part (1), these springs (161'')
and (162) in order to obtain sufficient strength to support the means (2) on the panel portion (1), and
By increasing the spring constant of a predetermined part of the frame (4), the X, Y, Z
The spring force in the direction can be weaker than the spring force in each x, y, z direction in the frame (4). Therefore, even if an unbalanced force is not applied to the frame (4) from the stand pins (151) and (152) via the springs (161) and (162') due to external vibrations such as those caused by subica shooting, for example, This force is absorbed by elastic deformation in each spring (161) and (162), so the frame (4
), the generation of elastic deformation vibrations, especially low frequency vibrations, is largely avoided. Therefore, it is possible to reliably avoid vibrations in the color selection electrode (3) due to speaker vibrations, etc., and thus "sway" in the electron beam transmission aperture (3a).

By providing the reinforcing plate (60), the spring constant of a predetermined portion of the frame (4) is increased.
, the inconvenience of increasing the weight, such as increasing the thickness, can be avoided.

Incidentally, since the spring constant in the planar direction of the reinforcing plate (60), that is, the plate-like body, is proportional to the cube of its width, the frame (
The effect of increasing the spring constant by providing the reinforcing plate in 4) is extremely large. For example, frame side (4) of frame (4)
When a reinforcing plate (60) with a width in the same direction of 24 mm is attached to A) and (4B) with a width of 14 mm in the depth direction, (24/14)3 = 5 and the spring constant is It increases by about 5 times.

〔Example〕

Furthermore, the present invention will be explained in detail by way of examples.

The illustrated example is a case where the present invention is applied to a color cathode ray tube having an aperture grill type color selection means (2), and one example of the present invention will be described in detail with reference to FIGS. 1 to 4. In this example, as will be explained in detail later, the occurrence of mislanding due to temperature rise is prevented by automatically opening and adjusting the distance between the fluorescent surface and the color selection means as the temperature rises. This is the case if you choose to do so.

In this example as well, the panel portion of the cathode ray tube body has a color phosphor surface (9) formed by, for example, phosphors of each color being alternately arranged in stripes extending in the vertical direction.
11, there is an aperture grill or color sorting means (2
) is placed. This color selection means (2) includes a color selection electrode (3) made of a thin metal plate in which slit-shaped electron beam transmission apertures (3a) extending along the vertical direction (Y direction) are arranged in the same manner as described above. consists of, for example, an aperture grill stretched over a frame (4). Frame (4
) refers to a pair of opposing frame sides (4A) and (4B) extending in the horizontal direction (X direction) of the screen and a pair of arms disposed across these frame sides (4A) and (4B). (4C) and (
4D), and a color selection electrode (3) is stretched between the frame sides (4Δ) and (4B).

A reinforcing plate (60) is welded along the outer surface of the upper and lower frame sides (4A) and (4B), which constitute two opposite horizontal sides of the frame (4). This reinforcing plate (60) is made of the same material as the frame (4), for example, iron.

And springs (16
Weld one end of each of 1) and (162).

In FIGS. 1 to 4, parts corresponding to those in FIGS. 9 to 12 are designated by the same reference numerals, and redundant explanation will be omitted.
Here the springs (161) and (162) are connected, for example, to the respective stand pins (151) and (15).
2) and these springs (161) and (16
2) In the vicinity of the attachment part for each side of the frame (4), each corresponding stand pin (151) and (15
2) are provided with first and second rotation mechanism parts (51) and (52) capable of rotating around the axis.

The first rotation mechanism section (51) includes a camp section (21) provided at each free end of the springs (161) and (162) of each section mentioned above, and a stand provided with frits at corresponding positions on the panel section (1). It can be configured by engagement with pins (151) and (1, 52). Stand pin (151) and (
1, 52) is made of ceramic or metal and has a cylindrical shape or a cylindrical shape with a closed top surface.

The cap part (21) has a spring (161) and a spring (161).
The springs (16) and 62) can be formed by extrusion, etc., respectively, but as shown in Fig. 4, the springs (16
1) and (162) are formed separately from the flange part (2).
1b> is made by pressing, for example, stainless steel 304, and this is made of, for example, S
Spring (161) made of US 610 (1
The flange portion (21b) can also be welded to the springs (161) and (162) by fitting into the through holes (24) bored at each free end of the spring 62).

Top surface (15) of stud pin (151') (152)
In a), a protrusion (22) is provided integrally with these pins (151) (152') at the same time as they are molded.

On the other hand, the bottom surface (21a) of the cap portion (21) is provided with a recess (23) on its central axis into which the protrusion (22) is inserted. This recess (23) is located on the bottom surface (
21a) can be formed by press working etc., but as in the example shown in FIG. 4, the camp part (21)
It is also possible to press-fit a disc made of a material such as ceramic, which has low frictional resistance with the protrusion (22), and form a recess (23) in the center of the disc.

Stand bins (151) (152) are located in the camping club (21
) so that the apexes of the protrusion (22) and the recess (23) are positioned on their respective axes so as to stably engage with each other on their respective axes.

The shapes of these projections (22) and recesses (23) can take various shapes.

For example, as shown in FIG. 4, the protrusion (22) is made spherical,
The recess (23) has a conical shape. In this engaged state, the top surface (L5) of the stand bin (151) (152)
a) and the bottom surface (21a) of the cap part (21), and a gap g exists between the circumferential surface of the stand bin (151) (152) and the inner circumferential surface of the cap part (21). Do what you want.

Further, 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 be a gently expanding spherical or conical surface, or the protrusion (22) may It can take various shapes, such as a curvature surface corresponding to a curvature surface.

In this way, the first spring (161) (162)
The rotation mechanism part (51) of the stud bin (151') (
At the engaging portion with the bottle (151) (1
52) can be configured to be swingable on the axis.

Further, the second rotation mechanism section (52) rotates the springs (161) and (162) each consisting of a single leaf spring to the first rotation mechanism section (52).
As shown in Figures 3 to 3, the frame (4) may have a rearwardly extending plate portion and a curved or bent portion folded back diagonally from the plate portion so as to be rotatable there; or As shown in A and B, insert the springs (161) (162) into the stud bin (151).
(152), which constitutes the part that engages with the spring body (55), and the holder part (55), which is also made of, for example, a leaf spring.
56), the spring body (55) is attached to one end (56a) of the holder (56), and the other end (56b) of this holder (56) is attached to the frame (4) by explosion welding or the like, This holder may be configured with a curved or bent portion. Alternatively, as shown in FIG. 7C, the spring (161) (
162) is provided with a corrugation to connect the second rotating mechanism section (
52) can also be configured, and other configurations of species η can be adopted.

Spring (161) and (16) of each part of the structure described above
2) each exhibits spring properties in the X, Y, and Z directions, and the spring constant thereof is specified in relation to each spring constant of the frame (4) as described above.

In other words, the fixing points S1 and S2 of each spring (161,) and (162) to each frame side (48) and (4B)
And the springs (161) and (162) of these parts
The spring constants in the X and Z directions between each engagement point R and R2 are determined by the common frame sides (4A) and (4B).
Fixing points S1 and 32 of the upper pair of springs (161) and (162) to each frame edge (4A) and (4B)
The spring constants are selected to be sufficiently smaller than the spring constants of the frame (4) in the similar x, Y, and Z directions between them, for example, - or less. The spring constant can be selected with a high degree of freedom in such a relationship, especially in the Z direction, by selecting the depth width of the reinforcing plate (60), that is, the width in the Z direction.

The width of the reinforcing plate (60) in the depth direction of the means (2), that is, the width in the direction along the tube axis Z direction, is selected to be larger than that of the frame sides (4A) and (4B). In this case, the larger the amount of protrusion from the frame sides (4A) and (4B) to the front or rear, the more the frame (4)
As the heat radiation effect from Consideration will be given to prevent this from occurring. According to the above configuration, the springs (161) and (162);
By selecting the spring constant relationship with the frame (4), external vibrations in the color sorting means (2) can be effectively avoided as described above.
4) The two opposing frame sides (4A) and (4B),
The above-mentioned first and second rotation mechanism parts (51) and (
52) of each part with springs (161) (16
2) By adopting a four-point support structure, it is possible to prevent mislanding. The effect of this will be explained with reference to FIG. In this case, frame (4
) only the part related to one of the opposing sides is shown. In this state, if the frame (4) now expands from the state shown by the solid line to the left and right in the figure due to temperature rise as shown by the chain line, the frame (4) of the pair of springs (161) (162) in the figure as kneading occurs. ) fixation points S and S2 spread to the left and right. At this time, the first and second rotation mechanisms (51) and (52) rotate and move to the left and right, but at this time, regarding each spring (16) and (162),
The strokes between the first and second rotation mechanism parts (51) and (52), the second rotation mechanism part (52) and the fixed point S
If the strokes between the parts and the parts 32 are kept almost constant, the frame (4)
) will move toward the front surface (1f). That is, each fixed point S1 and S2 is indicated by the reference numeral 81 in the figure.
' and 32', and the frame (4) is moved from the initial position (bar high) hl shown by the solid line to the smaller bar hide h2 position. In other words, the first and second rotation mechanism parts (51) and (
The center of rotation of 52) is the par-high +-m to be adjusted.
Rotation is performed around a direction perpendicular to the alignment direction. The amount of movement of this bar hide is calculated by the stroke length of the springs (161) (162), the stud bins (151') (152') and the spring (1
61) If the required amount is obtained by selecting the placement position of (162), bar hide adjustment can be made to prevent mislanding, as explained in FIG. 13. In this case, the reinforcing plate (60
), the frame sides (4A) and (4B) of frame (4)
) is reinforced in the Z-axis direction and configured to have a large spring constant.
The above-mentioned bar hide adjustment function is effectively performed from this point onward. In other words, when the temperature rises, if the spring constants of the frame sides (4^) and (4B) of the frame (4) are small, each spring (1
p) Frame sides (4A) and (4B) of 61') and (162) are bent before the ability to convert glutes occurs, impairing bar hide adjustment.

Also, regarding this bar hide adjustment function, the frame side (4A)
The amount of protrusion of the reinforcing plate (60) provided in (4B) from the front and rear sides from the frame sides (4A) and (4B) needs to take into consideration the effect based on the difference in heat dissipation effect. For example, as shown in Figure 8A, the frame side (4^) of the reinforcing plate (60)
and (4B) protrusion amounts dF and d from the front and rear
When B is dF < 6 days, the amount of heat dissipated at the rear is large, so the temperature at the rear decreases compared to the temperature at the front, and the reinforcing plate (60) as well as the frame sides (4A) and (4B )
Thermal expansion at the front of the frame is larger than that at the rear, and the frame edge (4A)
(4B) is deformed so that the curvature is strengthened, and an effect similar to that shown by the chain line in FIG. 6 occurs, and the barhide g adjustment function may be impaired. Therefore, the reinforcement plate (
60), it is necessary to consider such a heat dissipation effect, and for example, as shown in FIG. 8B, each protrusion fit
It is desired that dF and aS are set to ctF=dB. In the above example, the aperture grill type color sorting means (
2), which is commonly used in color cathode ray tubes.
This is not limited to this case, and various color sorting methods (
2) can be applied to a color shaded wire-wound tube.

〔Effect of the invention〕

According to the above-described configuration of the present invention, by providing the reinforcing plate (60) on the frame (4) of the color sorting means (2), the spring constant of the frame (4) can be changed to the spring (161'') and (
In relation to that of spring (162), it is possible to select with a high degree of freedom, and furthermore, the spring (161) and (
162), the degree of freedom in selecting the spring constant is increased.
It is possible to reliably prevent the vibration of the color selection electrode (3) due to speaker vibration, that is, the vibration of the electron beam passage aperture (3a), and to prevent mislanding, thereby producing high-quality images without color shift or fluctuation. In order to be able to project images and to prevent such shaking, it is necessary to increase the tension by which the electrode (3) is stretched between the frame sides (4A) and (4B) of the frame (4). As a result, it is possible to avoid increasing the strength of the frame (4) to increase this tension, thereby avoiding an increase in size and weight, resulting in many benefits such as being able to achieve reduction in weight and size.

[Brief explanation of the drawing]

FIG. 1 is a rear view of the mounting portion of the color selection means of an example of a color cathode ray tube according to the present invention, FIG. 2 is a sectional view taken along line A-A, FIG. 3 is a perspective view of the color selection means, and FIG. 5 is a detailed explanatory view of the present invention, FIG. 6 is a comparative view of the operation, and FIGS. 7A-C are perspective views of each side of the spring, respectively. 8A and 8B are diagrams showing the relationship between the reinforcing plate and the frame, FIG. 9 is a rear view of the mounting part of the conventional color sorting means, FIG. 10 is a perspective view of the color sorting means, and FIG. 11 is the same. FIG. 12 is a plan view of the engagement portion between the support pin and the spring, FIG. 12 is a sectional view taken along line A-A in FIG. 11, and FIG. 13 is an explanatory diagram of mislanding. (1) is a panel part, (2) is a color selection means, (3) is a color selection electrode, (4) is a frame, (60) is a reinforcing plate, (15)
1) (152) is a stand pin, (161) (16
2) is a spring, and (51) and (52) are first and second rotation mechanism parts.

Claims (1)

[Scope of Claims] A color selection means is mounted within the panel portion of the cathode ray tube body through a spring, facing a color fluorescent surface formed on the inner surface of the panel portion. , a color cathode ray tube in which a color selection electrode made of a thin metal plate with an electron beam transmission aperture is stretched over a frame, and a reinforcing plate having a coefficient of thermal expansion equivalent to that of the frame is attached to the side surface of the frame. A color cathode ray tube, wherein the width of the reinforcing plate is selected to be larger than the depth width of the frame, and the spring constant of the frame is adjusted.