JP2002343268A - Aperture grille body structure and cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aperture grille body structure and a cathode-ray tube, capable of preventing the vibration due to the impact from the external of the cathode-ray tube, and being easily mounted and demounted to and from a fluorescent panel of the aperture grille body structure. SOLUTION: A frame 1 for placing an aperture grille 9 is provided with first bases 2a, 2b, and second bases 3a, 3b, respectively joined to the first bases 2a, 2b to connect them. Mounting members 7aA, 7bA are joined to the second base 3a, and mounting members 7aB, 7bB are joined to the second base 3b. Further holding members 6aA, 6aB are joined to the mounting members 7aA, 7aB, and the holding members 6bA, 6bB are joined to the mounting members 7bA, 7bB. The aperture grille body structure 100 is mounted in the cathode-ray tube, by locking the holding members 6aA, 6aB, 6bA, 6bB to the mounting members 7bA, 7bB.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube,
In particular, it relates to the structure of a color selection electrode used in a color cathode ray tube.

[0002]

2. Description of the Related Art A so-called shadow mask type color selecting electrode and an aperture grill type color selecting electrode (hereinafter, referred to as an "aperture grill structure") are known as color selecting electrodes used in a color cathode ray tube. I have. FIG. 10 is a perspective view schematically showing the structure of an aperture grille structure according to the first conventional technique. As shown in FIG. 10, an aperture grille structure according to the first prior art includes an aperture grille 9, a frame 1, damper springs 10aA, 10aB, 10bA, and 10bB.
And damper wires 11a and 11b.

The aperture grill 9 has a plurality of slits 8 extending in the vertical direction DY in FIG. 10 and a plurality of grills 13 extending in the vertical direction DY similarly to the slits 8. Are alternately arranged in the horizontal direction DX in FIG. Here, the horizontal direction DX
Shows the horizontal direction of the screen of the cathode ray tube when the aperture grille structure shown in FIG. 10 is attached to the fluorescent panel of the cathode ray tube, and the vertical direction DY shows the vertical direction of the screen of the cathode ray tube.

[0004] The frame 1 is joined to a pair of first supports (hereinafter referred to as "H members") 2a and 2b and H members 2a and 2b, respectively, and is connected to a second support for connecting these members. (Hereinafter referred to as "V member") 3a, 3
b. The V member 3a has a bottom 4a extending in the vertical direction DY and arms 5aA and 5aB. One end of the arm 5aA is joined to the H member 2a, and the arm 5a
The other end of A is joined to one end of the bottom 4a. One end of the arm 5aB is joined to the H member 2b,
The other end of B is joined to the other end of the bottom 4a. Similarly,
The V member 3b has a bottom 4b extending in the vertical direction DY.
And an arm 5bA, and the other arm (not shown in FIG. 10) (tentatively referred to as “arm 5bB”). One end of the arm 5bA is joined to the H member 2a. Part 5bA
Is connected to one end of the bottom 4b. One end of the arm 5bB is joined to the H member 2b, and the arm 5bB
Is joined to the other end of the bottom 4b.

A mounting member 7b (also referred to as a "spring holder") to which a holding member 6b having a fitting hole 12b (also referred to as a "spring") is welded is provided on each of the front surfaces of the H members 2a and 2b. Welded.
In addition, at the bottoms 4a, 4b of the V members 3a, 3b,
The attachment member 7a to which the holding member 6a having the fitting hole 12a is welded is welded. In FIG. 10, welding points are indicated by crosses, and the same applies to FIGS. 1 and 3 described later.

Next, the aperture grill 9 is connected to the frame 1.
A method of joining the two will be described. V member 3 of frame 1
a, 3b is subjected to compressive stress, and a pair of H members 2
The aperture grill 9 is seam-welded to the H members 2a, 2b in a state in which the a and 2b are pressed so as to approach each other. Thereafter, when the pressurization of the frame 1 is released, a tension is generated in each grill 13 of the aperture grill 9 in the vertical direction DY by the restoring force. The aperture grille structure in this state may be referred to as a “spreading mask”.

The aperture grill 9 fixed to the frame 1 is trimmed to remove an outer frame portion protruding from the frame 1, and then subjected to a blackening process for a radiation effect and a rust prevention effect. Then, the aperture grille assembly is fitted with the fitting holes 12 of the holding members 6a and 6b.
The a and 12b are mounted inside the cathode ray tube by being fitted into panel pins (not shown) of the fluorescent panel of the cathode ray tube.

After the phosphor screen forming step, the damper springs 10aA and 10aB are connected to the bottom 4 of the V member 3a.
a, the damper springs 10bA and 10bB are welded to the bottom 4b of the V member 3b. A damper wire 11a whose ends are supported by the damper springs 10aA and 10bA, and damper springs 10aB and 10b
A damper wire 11 b whose end is supported by B is stretched in the horizontal direction DX so as to be in contact with the aperture grill 9. As a result, vibration of the aperture grill 9 is suppressed.

[0009]

In the aperture grille structure of the first prior art having the above-described structure, damper wires 11a and 11b are stretched to suppress the vibration of the aperture grille 9. With respect to the vibration at the central portion of the aperture grill 9, a sufficient vibration suppression effect cannot be obtained by merely stretching the normal damper wires 11a and 11b. FIG. 11 is a graph showing the distribution of the extension frequency of the aperture grille structure according to the first conventional technique. The horizontal axis represents the distance from the center of the frame 1, that is, H.
The distance from the center of the members 2a and 2b in the horizontal direction DX is shown, and the vertical axis shows the expansion frequency. Here, the extension frequency is a value obtained by converting the tension acting on the aperture grill 9 into a frequency, and T = (4 kL ²
/ G) · f ² (T: tension, k: specific gravity, L: grill length, G: gravitational acceleration, f: expansion frequency). As shown in FIG. 11, since the extension frequency of the central portion of the aperture grill 9 is usually low, that is, the tension acting on the aperture grill 9 is small at the central portion, the central portion of the aperture grill 9 is resistant to external impact. The structure is easy to vibrate. As a result, there is a problem that the image is liable to be shaken at the center of the display screen of the cathode ray tube.

The above problem can be solved by increasing the expansion frequency of the aperture grille 9. However, if the pressure point on the frame 1 is devised to increase the expansion frequency only at the center of the aperture grille 9, Another problem is that vibration of the aperture grill 9 cannot be stopped. Specifically, when the extension frequency of only the central portion of the aperture grill 9 is increased, the extension frequency difference between the adjacent grills 13 decreases. When vibration is applied to such an aperture grille structure, the aperture grille 9
Resonance occurs between the adjacent grilles 13 through the damper wires 11a and 11b that are in contact with.

When the expansion frequency is increased in the aperture grill 9 as a whole, the grill 13 at the end of the aperture grill 9 undergoes plastic deformation such as creep during the above-described blackening treatment, and the grill 13 rotates and the slit 13 is rotated. The width of 8 changes. Therefore, there is a problem that the width of the black matrix formed on the phosphor screen using the aperture grill 9 as a mask is not uniform.

FIGS. 12 and 14 are sectional views showing the shape of a grill 13 of an aperture grille structure according to the first prior art, and FIGS. 13 and 15 show the grill 1 shown in FIGS.
FIG. 4 is a diagram showing a shape of a black matrix 50 formed using an aperture grille structure having a mask 3 as a mask.
FIGS. 12 and 13 are diagrams when plastic deformation is not occurring in the grill 13, and FIGS. 14 and 15 are diagrams when plastic deformation is occurring in the grill 13.

As shown in FIGS. 12 and 13, when no plastic deformation occurs in the grill 13, the width of the slit 8 between the grills 13 is substantially uniform. Therefore, when the black matrix 50 is formed on the phosphor screen using the aperture grill structure having the grill 13 as shown in FIG. 12 as a mask, the width of the black matrix 50 becomes substantially uniform.

On the other hand, the above-mentioned blackening process is performed, for example, at 400 to
Since the processing is performed at a high temperature of 500 ° C., if the expansion frequency is increased in the entire aperture grill 9, the grill 13 of the aperture grill 9 is liable to undergo plastic deformation such as creep. Therefore, as shown in FIG. 14, the grill 13 is twisted and rotated, and the width of the slit 8 changes. And
As shown in FIG. 15, when the black matrix 50 is formed on the phosphor screen using the aperture grill structure having the grill 13 as shown in FIG. 14 as a mask, the width of the black matrix 50 varies. As a result, black and white stripes appear on the display screen of the cathode ray tube. In addition,
The non-uniformity of the width of the black matrix 50 is referred to as “stripes”.

In Japanese Patent Application Laid-Open No. HEI 6-243793, a second countermeasure against vibration is provided by corner supporting an aperture grille structure in a fluorescent panel of a cathode ray tube.
Is disclosed. FIG. 16 is a perspective view schematically showing a structure of an aperture grille structure according to the second conventional technique. As shown in FIG. 16, the mounting members 7a,
Each of 7b has two surfaces, and one surface is welded and joined to the V member 3a of the frame 1. The other surfaces of the mounting members 7a and 7b are located at the corners of the frame 1, and the holding members 6a and 6b are welded and joined. At this time, the holding member 6
The fitting holes 12a and 12b of the a and 6b are located at the corners of the frame 1, and the fitting holes 12a and 12b are fitted with panel pins (not shown) provided at the corners of the fluorescent panel of the cathode ray tube. By doing so, the aperture grille structure is corner-supported in the fluorescent panel.

In the aperture grille structure according to the second prior art described above, since the panel pins to which the holding members 6a and 6b are locked are provided at the corners of the fluorescent panel, the inner surface of the fluorescent panel extends to the periphery of the panel pins. , And it was difficult to attach and detach the holding members 6a and 6b to and from the panel pins.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and suppresses vibration due to an external impact of a cathode ray tube and facilitates attachment and detachment of an aperture grille structure to a fluorescent panel. An object of the present invention is to provide an aperture grille structure and a cathode ray tube.

[0018]

Means for Solving the Problems Claim 1 of the present invention
In the aperture grille structure described in (1), an aperture grille in which a plurality of stripe-shaped slits extending in a first direction are arranged in a second direction perpendicular to the first direction, and the aperture grille in the first direction are opposed to each other. A pair of first support members respectively joined to the pair of end portions,
A second support member joined to and connected to each of the first support members, the second support member being located on a first end side of the aperture grill in the first direction, and being associated with a first mounting object; A first holding member to be stopped, a second holding member positioned on a second end side of the aperture grille in the second direction and locked by a second mounting object,
And the second and the first holding members respectively joined to the second holding member
And the first and second attachment members are both joined to the second support.

The aperture grille structure according to a second aspect of the present invention is the aperture grille structure according to the first aspect, wherein the second support is provided with the first grille.
A bottom portion extending in the direction, and first and second arms,
One end of the first arm is joined to one of the first supports, the other end of the first arm is joined to one end of the bottom, and one end of the second arm is The other end of the second arm portion is joined to the other end of the bottom portion, and the first and second mounting members are joined to the bottom portion. Things.

A cathode ray tube according to a third aspect of the present invention includes the aperture grille structure according to any one of the first and second aspects as a color selection electrode.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a perspective view schematically showing the structure of the aperture grille structure 100 according to the first embodiment. FIG. 2 is a plan view schematically showing the structure of the aperture grille assembly 100. When the aperture grille assembly 100 is mounted on a cathode ray tube, the aperture grille 9 is viewed from the surface on which the electron beam is irradiated. FIG. 2 is a plan view of the structure 100, that is, a plan view of the aperture grill structure 100 in the direction of arrow A <b> 1 in FIG. 1. In FIG. 2, the slit 8 of the aperture grill 9 in FIG.
3. Damper springs 10aA, 10aB, 10b
A, 10bB and the description of the damper wires 11a, 11b are omitted.

As shown in FIGS. 1 and 2, an aperture grille structure 100 according to the first embodiment includes an aperture grille 9, a frame 1 joined to the aperture grille 9, and a damper spring 10 joined to the frame 1.
aA, 10aB, 10bA, 10bB and damper wire 1
1a and 11b.

The aperture grill 9 has a plurality of slits 8 extending in the vertical direction DY in FIG. 1 and a plurality of grills 13 extending in the vertical direction DY similarly to the slits 8. Are alternately arranged in the horizontal direction DX in FIG.

The frame 1 has a pair of H members 2a, 2b, which are curved in correspondence with the horizontal direction DX of the screen curved surface of the cathode ray tube and have a joint surface with the aperture grill 9.
2b and V members 3a, 3b joined to and connected to the H members 2a, 2b, respectively.

The V member 3a has a bottom 4a extending in the vertical direction DY, and arms 5aA and 5aB.
One end of A is joined to the H member 2a, and the other end of the arm 5aA is joined to one end of the bottom 4a. The arm 5a
One end of B is joined to the H member 2b, and the other end of the arm 5aB is joined to the other end of the bottom 4a. Similarly, the V member 3b has a bottom 4b extending in the vertical direction DY and arms 5bA and 5bB. One end of the arm 5bA is joined to the H member 2a, and the other end of the arm 5bA is a bottom. 4b. One end of the arm 5bB is joined to the H member 2b, and the other end of the arm 5bB is joined to the other end of the bottom 4b.

An attachment member 7aA is attached to the bottom 4a of the V member 3a, and an attachment member 7aB is attached to the bottom 4b of the V member 3b, for example, by welding. Also,
The mounting member 7bA is attached to the arm 5aA of the V member 3a,
A mounting member 7bB is joined to the arm 5bB of the member 3b, for example, by welding. Holding members 6aA, 6aB
Is a leaf spring that extends in the vertical direction DY, for example, and is located on the end side of the aperture grill 9 in the horizontal direction DX. One end of the holding member 6aA is joined to the attachment member 7aA, and one end of the holding member 6aB is joined to the attachment member 7aB, for example, by welding. The other end of the holding member 6aA has a fitting hole 12aA, and the other end of the holding member 6aB has a fitting hole 12aA.
B. The holding members 6bA and 6bB are, for example, leaf springs extending in the horizontal direction DX, and
At the end side of the aperture grill 9. One end of the holding member 6bA is
bA, one end of the holding member 6bB is attached to the mounting member 7bB.
, For example, by welding. Holding member 6bA
Has a fitting hole 12bA at the other end thereof, and has a fitting hole 12bB at the other end of the holding member 6bB.

In addition, of the mounting members 7bA and 7bB, instead of bonding the mounting member 7bB to the arm 5bB of the V member 3b, the mounting member 7bA may be bonded to the arm 5aB of the V member 3a. Instead of joining to the arm 5aA of the member 3a, it may be joined to the arm 5bA of the V member 3b. Also, instead of joining the mounting member 7bB to the arm 5bB of the V member 3b, the arm 5 of the V member 3a is used.
aB, and instead of joining the mounting member 7bA to the arm 5aA of the V member 3a, the arm 5 of the V member 3b is used.
It may be bonded to bA. Hereinafter, the holding members 6aA and 6aB
May be collectively referred to as the holding member 6a, the holding members 6bA and 6bB may be collectively referred to as the holding member 6b, and the mounting members 7aA and 7aB may be collectively referred to as the mounting member 7a and the mounting members 7bA and 7bB.

Here, the aperture grill 9 is made, for example, by cold working ultra-low carbon steel and having a tensile strength of about 687 N.
/ Mm ^{2 to} 785 N / mm ² . Then, in a state where a compressive stress is applied to the V members 3a, 3b of the frame 1 and the pair of H members 2a, 2b are pressed so as to approach each other, the aperture grill 9 moves the H members 2a, 3a. 2b is seam welded to the curved joint surface. Thereafter, when the pressurization of the frame 1 is released, a tension is generated in each grill 13 of the aperture grill 9 in the vertical direction DY by the restoring force. As described above, in the aperture grill system, by giving tension to each grill 13, even if the temperature of the aperture grill 9 rises due to collision of the electron beam with each grill 13, each grill 13 can absorb the expansion. It has a configuration.

The aperture grill 9 fixed to the frame 1 is trimmed to remove an outer frame portion protruding from the frame 1, and then subjected to a blackening process for a radiation effect and a rust prevention effect. Then, the aperture grille structure 100 includes the holding members 6aA, 6aB,
6bA, 6bB fitting holes 12aA, 12aB, 12b
A, 12bB are fitted into panel pins (not shown) of a fluorescent panel of a cathode ray tube, and holding members 6aA, 6aB,
6bA and 6bB are attached to the inside of the cathode ray tube by being locked to the panel pins.

After the phosphor screen forming step, the damper springs 10aA and 10aB are connected to the bottom 4 of the V member 3a.
a, the damper springs 10bA and 10bB are welded to the bottom 4b of the V member 3b. A damper wire 11a whose ends are supported by the damper springs 10aA and 10bA, and damper springs 10aB and 10b
A damper wire 11 b whose end is supported by B is stretched in the horizontal direction DX so as to be in contact with the aperture grill 9. As a result, vibration of the aperture grill 9 is suppressed.

Embodiment 1 having the above-described structure
According to the aperture grille structure 100 according to the above, the attachment member 7aA is joined to the bottom 4a of the V member 3a, and the attachment member 7aB is joined to the bottom 4b of the V member 3b. The mounting member 7bA is connected to the arm 5a of the V member 3a.
A, and the mounting member 7bB is joined to the arm 5bB of the V member 3b. In other words, the mounting member 7a
A, 7aB, 7bA, 7bB are all V members 3
a, 3b, vibrations (hereinafter referred to as "external vibrations") from the outside of the cathode ray tube are input to the V members 3a, 3b, and the H members 2a, 2b.
To the aperture grill 9.

In the aperture grille structure according to the first prior art shown in FIG. 10, the external vibration transmitted from the holding member 6a to the mounting member 7a is applied to the V members 3a, 3b.
Are transmitted to the bottom portions 4a and 4b of the aperture grille 100, the transmission path of the external vibration to the aperture grille 9 is the same as that of the aperture grille structure 100. However, since the mounting member 7b is joined to the H member 2b, the external vibration transmitted from the holding member 6b to the mounting member 7b is not applied to the H member 2b.
And transmitted to the aperture grill 9. As described above, in the aperture grille structure 100 according to the first embodiment, the external vibration is input to the V members 3a and 3b, transmitted to the H members 2a and 2b, and transmitted to the aperture grill 9, so that the first vibration is generated. The transmission path of the first embodiment as a whole is longer than the transmission path of the external vibration to the aperture grille 9 in the related art. Therefore, the amplitude of the external vibration transmitted to the aperture grill 9 is attenuated more in the aperture grille structure 100 according to the first embodiment than in the aperture grille structure according to the first related art. As a result, it is possible to reduce the fluctuation of the display screen of the cathode ray tube due to external vibration without increasing the extension frequency of the aperture grill 9.

Further, according to the aperture grille structure 100 according to the first embodiment, the holding members 6 a and 6 b are not located at the corners of the frame 1 or the aperture grille 9 but at the end sides of the aperture grille 9. For this reason, the panel pins on which the holding members 6a and 6b are locked are also provided not on the corners of the fluorescent panel but on a plane facing the edge of the aperture grill 9. Therefore, the inner surface of the fluorescent panel does not approach the periphery of the panel pin, and the attachment and detachment of the aperture grille assembly to and from the fluorescent panel becomes easier than in the above-described second related art.

In the aperture grille structure according to the second prior art shown in FIG. 16, the center axis of the panel pin overlaps with the normal to the joint surface between the mounting members 7a, 7b and the holding members 6a, 6b. Also, due to the structure, the distance between the joint surface of the mounting members 7a, 7b and the panel pin cannot be made large, so that a vertical spring with a small bending angle, in other words, a large bending is used for the holding members 6a, 6b. I have. In the aperture grille assembly 100 according to the first embodiment, the normal to the attachment surfaces of the attachment members 7a and 7b is shifted in the vertical direction DY or the horizontal direction DX from the center axis of the panel pin. , 6b can be leaf springs (also called “lateral springs”) extending in the vertical direction DY or the horizontal direction DX. For this reason, the holding members 6a and 6b used in the aperture grille structure according to the second conventional technique are used.
The shape of the holding members 6a and 6b can be set so that the bending angle becomes larger, in other words, the bending angle becomes smaller. As a result, the stress applied to the bent portions of the holding members 6a, 6b can be reduced, so that the deterioration of the holding members 6a, 6b can be reduced.

Embodiment 2 FIG. 3 is a perspective view schematically showing the structure of the aperture grille structure 101 according to the second embodiment. FIG. 4 shows an aperture grille structure 1.
FIG. 13 is a plan view schematically showing the structure of the aperture grille structure 101 from the surface of the aperture grille 9 where the electron beam is irradiated when the aperture grille structure 101 is attached to the cathode ray tube; That is, FIG.
Aperture grille structure 101 from the direction of arrow A2 inside
It is a top view when seeing. In FIG. 4, the slit 8 and the grill 13 of the aperture grill 9 and the damper springs 10aA, 10aB, 10bA, 10bB in FIG.
The description of the damper wires 11a and 11b is omitted.

The aperture grille structure 101 is the same as the aperture grille structure 100 described above, except that the mounting member 7b
The shape of A, 7bB is changed, and the welding location of the attachment members 7bA, 7bB in the V member 3a is changed. Aperture grille structure 10 according to Embodiment 2
1, the mounting member 7b of the aperture grille structure 100
The reference numerals of the mounting members corresponding to A, 7bB are "17bA, 1".
7bB ".

The mounting member 17bA is substantially L-shaped along the corner 20a of the frame 1.
7bB is substantially L along the corner 20b of the frame 1.
It is shaped like a letter. The corner portion 20a of the frame 1
The mounting member 17bA is a joint between the arm portion 5aA of the V member 3a and the bottom portion 4a, and the mounting member 17bA faces the bottom portion 4a.
a and a surface 21b facing the arm 5aA.
Further, the corner portion 20b of the frame 1 is
b, the mounting member 17bB is a joint portion between the arm 5bB and the bottom 4b, and the mounting member 17bB has a surface 22a facing the bottom 4b and the arm 5
bB and a surface 22b opposed to bB.

The surface 21a of the mounting member 17bA is V
The bottom 4a of the member 3a is joined by, for example, welding, and the surface 22a of the mounting member 17bB is joined to the bottom 4b of the V-member 3b by, for example, welding. Holding members 6bA, 6b joined to mounting members 17bA, 17bB
B is, like the aperture grille structure 100 described above,
It is located on the end side of the aperture grille 9 in the vertical direction DY. The other structure is the same as that of the above-described aperture grille structure 100, and thus the description is omitted.

According to the aperture grille structure 101 according to the second embodiment having the above-described structure, the mounting member 7a
A and 17bA are joined to the bottom 4a of the V member 3a, and the mounting members 7aB and 17bB are joined to the bottom 4b of the V member 3b. That is, the mounting members 7aA, 7a
aB, 17bA, 17bB are all V members 3a,
External vibration is input to the bottoms 4a and 4b of the V-members 3a and 3b because the bottoms 4a and 4b are joined to the bottoms 4a and 4b.
Arms 5aA, 5aB, 5bA, 5bB, H member 2
and transmitted to the aperture grill 9.

In the aperture grille assembly 100 according to the first embodiment, the external vibration transmitted from the holding members 6aA, 6aB to the mounting members 7aA, 7aB is input to the bottoms 4a, 4b of the V members 3a, 3b. The transmission path of the external vibration to the aperture grille 9 is the same as that of the aperture grille structure 101, but the holding member 6
The external vibration transmitted from bA, 6bB to the mounting members 7bA, 7bB is input to the arms 5aA, 5bB instead of the bottoms 4a, 4b of the V members 3a, 3b, and the H member 2
and transmitted to the aperture grill 9. Therefore, the aperture grille structure 101 is
The transmission path of the input external vibration becomes longer as a whole than the aperture grille structure 100. As a result, the amplitude of the external vibration transmitted to the aperture grille 9 is attenuated more in the aperture grille structure 101 than in the aperture grille structure 100, and the fluctuation of the display screen of the cathode ray tube due to the external vibration can be reduced.

Next, the first prior art and the first embodiment,
Experimental results obtained by observing the state of vibration of the aperture grille 9 when a shock is applied from the outside of the cathode ray tube having the aperture grille structure in each of the cases 2 will be described.

FIG. 5 is a diagram showing a state of vibration of the aperture grill 9 when a shock is applied from the outside of the cathode ray tube having the aperture grille structure according to the first prior art, and FIG. 6 shows the first embodiment. FIG. 7 is a diagram showing a state of vibration of the aperture grill 9 when a shock is applied from the outside of the cathode ray tube provided with the aperture grill structure 100 according to the first embodiment. FIG. 7 shows the aperture grill structure 101 according to the second embodiment.
FIG. 6 is a diagram showing a state of vibration of the aperture grill 9 when a shock is applied from the outside of the cathode ray tube provided with. Times t1 to t3 shown in FIGS. 5 to 7 indicate the decay time of the vibration of each aperture grill 9, and FIG. 8 collectively shows the values of the times t1 to t3. FIG. 9 is a diagram showing the observation points of the vibration of the aperture grill 9 in this experiment.

In this experiment, the state of vibration of the center portion of the aperture grill 9 and the decay time of the vibration when a shock of 0.35 N · m was externally applied to the center portion of the display screen of the cathode ray tube were measured. Specifically, the vibration of the portion indicated by the vibration observation point 30 in FIG. 9 was observed.

As shown in FIGS. 5 to 7, the amplitude at the start of vibration of each aperture grille 9 decreases in the order of the first prior art, the first embodiment, and the second embodiment. That is, the amount of attenuation of the external vibration between the time when the external vibration is input to the aperture grille structure and the time when the external vibration is transmitted to the aperture grille 9 increases in the above-described order. As a result, as shown in FIG. 8, the attenuation time of the vibration of the aperture grille 9 of the aperture grille structure in the first prior art is 12 seconds, and the attenuation of the vibration of the aperture grille 9 of the aperture grille structure 100 according to the first embodiment. The time is 5 seconds, and the damping time of the vibration of the aperture grill 9 of the aperture grille structure 101 according to the second embodiment is 3 seconds, and the aperture grill is arranged in the order of the first prior art, the first embodiment, and the second embodiment. The decay time of the vibration of No. 9 becomes shorter. Therefore, the use of the aperture grille structure according to the first or second embodiment can reduce the fluctuation of the display screen of the cathode ray tube due to the external vibration, as compared with the use of the aperture grille structure according to the first conventional technique. it can.

Further, as shown in FIG. 11, the central portion of the aperture grill 9 has a low extension frequency, so that the central portion of the aperture grill 9 is vulnerable to external vibration. For this reason, the mounting member 7b is not joined to the center portion of the H members 2a and 2b that span the aperture grille 9 like the aperture grille structure according to the first prior art shown in FIG. As in the aperture grille structures according to the first and second embodiments shown in FIGS.
Attaching the attachment members 7bA, 7bB to the frame 1 at a position as far as possible from the center of the aperture grille 9 provides a higher damping effect.

[0046]

According to the aperture grille structure according to the first aspect of the present invention, the aperture grille structure usually includes a holding member attached to a panel pin provided on the inside of the panel and to which the holding member is attached. By being locked, it is attached inside the cathode ray tube, so that vibrations applied from outside the cathode ray tube are input to the second support and transmitted to the first support. Therefore, the vibration transmitted to the aperture grill is attenuated as compared with the case where the attachment member to which the holding member is joined is directly joined to the first support. As a result, it is possible to reduce the fluctuation of the image on the display screen of the cathode ray tube.

Further, when the holding member is provided at the corner of the aperture grill and the holding member is engaged with the panel pin provided at the corner of the panel, the inner surface of the panel approaches the periphery of the panel pin. It was difficult to attach the holding member to the panel pin. According to the present invention, since the holding member is not located at the corner of the aperture grill but at the edge of the aperture grill, the panel pin is also provided at the plane facing the edge of the aperture grill, not at the corner of the panel. Can be Therefore, the inner surface of the panel does not approach the periphery of the panel pin, and attachment and detachment of the aperture grill and the panel are facilitated.

According to the aperture grille structure of the second aspect of the present invention, the vibration applied from the outside of the cathode ray tube is input to the bottom of the second support, and is transmitted to the first through the arm. Transmitted to the support. Therefore, the vibration transmitted to the aperture grill is attenuated as compared with the case where the mounting member to which the holding member is joined is directly connected to the arm.

Further, according to the cathode ray tube according to the third aspect of the present invention, it is possible to provide a cathode ray tube having the effect of the aperture grille structure according to any one of the first and second aspects.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a structure of an aperture grille structure 100 according to a first embodiment.

FIG. 2 is a plan view schematically showing the structure of the aperture grille structure 100 according to the first embodiment.

FIG. 3 is a perspective view schematically showing a structure of an aperture grille structure 101 according to a second embodiment.

FIG. 4 is a plan view schematically showing a structure of an aperture grille structure 101 according to the second embodiment.

FIG. 5 is a diagram showing an experimental result on an aperture grille structure according to the first conventional technique.

FIG. 6 is a diagram showing experimental results on the aperture grille assembly 100 according to the first embodiment.

FIG. 7 is a view showing an experimental result regarding the aperture grille structure 101 according to the second embodiment.

FIG. 8 is a diagram showing experimental results on the aperture grille structure according to the first related art and the first and second embodiments.

FIG. 9 is a view showing a vibration observation point of the aperture grill 9 of the aperture grille structure according to the first related art and the first and second embodiments.

FIG. 10 is a perspective view schematically showing a structure of an aperture grille structure according to the first conventional technique.

FIG. 11 is a graph showing the distribution of the extension frequency of the aperture grille structure in the first related art.

FIG. 12 is a cross-sectional view showing a shape of a grill 13 of an aperture grille structure according to the first related art.

FIG. 13 is a black matrix 5 formed using the aperture grille structure in the first prior art as a mask.
It is a figure which shows the shape of 0.

FIG. 14 is a sectional view showing a shape of a grill 13 of an aperture grille structure according to the first conventional technique.

FIG. 15 is a black matrix 5 formed using the aperture grille structure in the first prior art as a mask.
It is a figure which shows the shape of 0.

FIG. 16 is a perspective view schematically showing a structure of an aperture grille structure according to a second conventional technique.

[Explanation of symbols]

1 frame, 2a, 2b first support, 3a, 3b
The second support, 4a, 4b bottom, 5aA, 5aB,
5bA, 5bB Arm, 6aA, 6aB, 6bA, 6b
B holding member, 7aA, 7aB, 7bA, 7bB, 17
bA, 17bB mounting member, 8 slits, 9 aperture grill, 100, 101 aperture grill structure.

Claims (3)

[Claims] 1. An aperture grill in which a plurality of stripe-shaped slits extending in a first direction are arranged in a second direction perpendicular to the first direction, and a pair of opposite ends of the aperture grill in the first direction. A pair of first support members respectively joined to the portion, a second support member joined to each of the first support members and connecting them, and a second support member of the aperture grille in the first direction. A first holding member positioned on one end side of the aperture grille and locked on a first mounting target; a second holding target positioned on a second end side of the aperture grille in the second direction; A second holding member locked to the first holding member and a first holding member joined to the first and second holding members, respectively.
An aperture grille structure comprising: a first mounting member; and a second mounting member, wherein the first and second mounting members are both joined to the second support. 2. The second support member has a bottom extending in the first direction, and first and second arms, and one end of the first arm is connected to the first arm. One end of the first arm is joined to one end of the bottom, one end of the second arm is joined to the other of the first support, and the other end of the second arm is joined to the other of the first support. The aperture grille assembly according to claim 1, wherein the other end of the second arm is joined to the other end of the bottom, and the first and second mounting members are both joined to the bottom. 3. A cathode ray tube comprising the aperture grille structure according to claim 1 as a color selection electrode.