JPH08124489A - Color sorting device - Google Patents

Abstract

PURPOSE: To prevent the tension of wires from decreasing at the mounting portion of the plateshaped holder of a frame by providing a plate-shaped holder with a notched portion whose length in a direction perpendicular to the direction of connecting together a pair of welding regions for the opposite sides of the frame is longer than the diameter of the welding regions, the notched portion being located between the pair of welding regions. CONSTITUTION: A plate-shaped holder 4 for mounting and holding a color sorting device in the body of a color cathode-ray tube is attached by electrical welding to the outside of each of the opposite sides 1A, 1B of a frame 1, with a number of wires 10 stretched over the opposite sides 1A, 1B. The holder 4 comprises two long plates 4a, 4b integrated together into an L-shape by welding. One plate 4a of the holder 4 is made of a bimetal and has its end electrically welded to the outside of each of the opposite sides 1A, 1B of the frame at the pair of welding regions 8a, 8b of the frame 1. The other plate 4b having elasticity is welded to the loose end of the plate 4a. A through hole 4c is provided in the plate 4b. A notch 111 whose length L in a direction perpendicular to the direction of connecting the welding regions 8a, 8b together is longer than the diameter ϕof the welding regions 8a, 8b is provided at one end of the plate 4a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a frame between opposite sides of a frame,
The present invention relates to a color selection device in which a large number of filaments are stretched so that a large number of slits are formed.

[0002]

2. Description of the Related Art FIG. 6 shows a color selecting device, 1 is a substantially rectangular frame, 2 is a mask attached to the frame 1 by welding, and 10 is a number of strips (or tapes) constituting the mask 2. Of the slits 9 extending between the opposite sides (long sides) 1A and 1B of the frame 1, the filaments 10 being arranged in parallel with each other, and the slits 9 through which electron beams of three colors pass between them. Is formed. Reference numerals 7 and 7 denote a pair of “U” -shaped reinforcing arms 7 and 7 for reinforcing the frame 1, which are attached to both sides of the opposing sides 1A and 1B of the frame 1. 3 is two damper wires, a large number of filaments 1
In order to suppress the vibration of 0, it is laid on the outside of each short side of the frame 1 via the damper spring 6 and the support plate 11 so as to intersect (orthogonalize) with the large number of filaments 10.

Reference numeral 4 is a plate-like holder for mounting and holding the color selecting device in the tube of the color cathode ray tube.
Are attached to the outer sides of the opposing sides 1A, 1B on which a large number of filaments 10 are stretched by electric welding. In this plate-shaped holder 4, two elongated plates 4a and 4b are integrated by welding so as to form an "L" shape. One plate 4a of the holder 4 is made of bimetal, and its ends are electrically welded to the outer sides of the opposite sides 1A and 1B of the frame 1 in paired welding regions 8a and 8b along the extending direction of the frame 1. It The plate 4a having the other elasticity at the free end of the plate 4a
Are attached by welding. A through hole 4c is formed in the other plate 4b.

5 is a panel support spring (elastic plate),
It is attached to each outer side of each short side of the frame 1 via the support plate 11 described above.

[0005]

When the holder 4 of the conventional color selecting device is electrically welded to the opposite sides 1A, 1B of the frame 1, a large current is applied between the frame 1 and the holder 4 for welding, so that the frame 1 is welded. Of the opposite side 1A, 1B of the holder 4 is heated near the mounting portion,
0 is reduced and the plate 4a of the holder 4 itself has rigidity, so that the material of the frame 1 is deteriorated during the heat treatment process of the color cathode ray tube and the filament 1 near the mounting portion of the holder 4 is deteriorated.
The tension of 0 decreases. As described above, the filament 10 whose tension has been reduced is likely to vibrate, and the image quality of the color image is partially degraded.

[0006] T _{1 in} Fig. 5 shows the characteristic of the tension of the filament 10 at the image position in the direction substantially orthogonal to the many filaments 10 in the 20-inch type color cathode ray tube. However, the tension tends to decrease, but the tension at the mounting position of the holder 4 (around 60 mm from the left end of the frame 1) partially decreases.

In view of such a point, the present invention has a plurality of filaments stretched so as to form a large number of slits between opposing sides of a frame, and a color selecting device is provided on each outer side of the opposing sides of the frame. In the color selecting device in which the plate-shaped holders mounted and held in the tube body of the color cathode ray tube are respectively mounted by electric welding, a color selecting device in which the tension of the filaments in the mounting portion of the plate-shaped holder of the frame is less likely to decrease It is a proposal.

[0008]

According to the present invention, a large number of filaments 10 are stretched between the opposite sides 1A and 1B of the frame 1 so that a large number of slits 9 are formed, and the opposite side 1A of the frame 1 is formed. 1B, a plate-like holder 4 for mounting and holding the color selecting device inside the tube of the color cathode ray tube is attached to each outer side of 1B by electric welding.
In the plate-shaped holder 4, the length in the direction substantially orthogonal to the direction connecting the paired welding regions 8a, 8b between the paired welding regions 8a, 8b with respect to the opposite sides 1A, 1B of the frame 1 is the pair. The color selection device is characterized in that the lacking portion 11 longer than the diameter of the welding regions 8a and 8b forming the is provided.

[0009]

According to the present invention, the plate-shaped holder 4 is provided with the welding region 8 forming a pair with the opposing sides 1A and 1B of the frame 1.
Since the absent part 11 having a length in the direction substantially orthogonal to the direction connecting the paired welding regions 8a, 8b is longer than the diameter of the paired welding regions 8a, 8b is provided between a and 8b, The opposite sides 1A, 1B of the holder 4 and the frame 1 during welding
The current flowing therethrough is reduced, so that the heating of that portion is reduced, the tension of the filament 10 in the vicinity is less likely to be reduced, and the rigidity of the plate 4a of the holder 4 is reduced, so that the color cathode wire is reduced. During the heat treatment process of the tube, the material of the frame 1 is less likely to deteriorate and the tension of the filament 10 near the attachment portion of the holder 4 is less likely to decrease.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A color sorting apparatus according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The structure of the entire color sorting apparatus is the same as that of the conventional color sorting apparatus shown in FIG. Therefore, the description will be omitted and the holder part will be described. Reference numeral 4 denotes a plate-like holder for attaching and holding the color selection device in the tube body of the color cathode ray tube, which is attached to each outer side of the opposing sides 1A, 1B on which a large number of filaments 10 of the frame 1 are stretched by electric welding. ing. This plate-shaped holder 4 is composed of two elongated plates 4
a and 4b are integrated by welding so as to form an "L" shape. One plate 4a of the holder 4 is made of bimetal, and its ends are opposite sides 1A, 1B of the frame 1.
Is electrically welded to each outer side of the welding regions 8a and 8b which form a pair along the extending direction of the frame 1. The other elastic plate 4b is attached to the free end of the plate 4a by welding. A through hole 4c is formed in the other plate 4b.

In this embodiment, the plate 4a of the plate holder 4 is
Outside the opposite sides 1A and 1B of the frame 1 of the opposite side 1
Although the welding is performed with two even welded areas 8a, 8b, which are substantially along the extending direction of A, 1B, between the welded areas 8a, 8b paired with the opposite sides 1A, 1B of the frame 1,
The length L in the direction substantially orthogonal to the direction connecting the paired welding regions 8a and 8b is such that the paired substantially circular welding regions 8 are formed.
A cutout 11 is provided, that is, a cutout portion 11a, 8b longer than the diameter Φ.

By providing the notch 11 as described above, when the holder 4 is electrically welded to the opposite sides 1A, 1B of the frame 1, the current flowing between the frame 1 and the holder 4 becomes smaller than that in the conventional example. Therefore, heating of the opposing side of the frame 1 in the vicinity of the mounting portion of the holder 4 of the frame 1 is less than in the conventional example, and the tension of the filament 10 in the vicinity is less likely to decrease. Further, since the notch 11 is provided in the holder 4, that is, the plate 4a, the holder 4, that is, the plate 4a,
Since the rigidity of the plate 4a is reduced, the material of the frame 1 is less likely to deteriorate in the heat treatment process of the color cathode ray tube as compared with the conventional example, and the tension of the filament 10 near the mounting portion of the holder 4 is less likely to be reduced. . Therefore, as is clear from the curve T ₂ in FIG. 5, the tension of the filament 10 in the vicinity of the plate-shaped holder 4 on the opposite sides 1A, 1B of the frame 1 is less likely to decrease, and the image quality of the color image is deteriorated. Is less likely to occur.

Here, the width of the plate 4a of the holder 4 is W, the length is L, the diameter of the welding regions 8a and 8b is Φ, the width of the notch 11 is D, and the length thereof (the welding regions 8a and 8b are connected together). When the length (in the direction substantially orthogonal to the direction) is E, the plate 4a of the plate holder 4 is designed so as to satisfy the following inequality.

0 <D <W-6Φ E> 3Φ 0 <D × E <D × L / 2

3 and 4 show another embodiment of the present invention. In this embodiment, the frame 1 of the plate 4a of the holder 4 is
Are welded to the outer sides of the opposing sides 1A, 1B with two welding regions substantially along the extending direction of the opposing sides 1A, 1B, but a pair of welding regions 8a for the opposing sides 1A, 1B of the frame 1,
A length E in a direction substantially orthogonal to a direction connecting the paired welding regions 8a and 8b between 8b is the welding region 8 forming the pair.
A through hole 11 is provided, which is an absent portion longer than the diameter Φ of a and 8b, that is, an elongated portion here.

Here, the width of the plate 4a of the holder 4 is W, the length is L, the diameter of the welding region is Φ, the width of the through hole 11 is D, and its length (the direction connecting the welding regions 8a and 8b is approximately the same). Let E be the length in the orthogonal direction, so that the following inequality is satisfied,
The plate 4a of the plate-shaped holder 4 is designed.

0 <D <W-6Φ E> 3Φ 0 <D × E <D × L / 2

According to the present invention described above, a large number of filaments 10 are stretched so as to form a large number of slits 9 between the opposite sides 1A and 1B of the frame 1, and the opposite side 1 of the frame 1 is formed.
In the color selecting device, in which plate holders 4 for mounting and holding the color selecting device inside the tube of the color cathode ray tube are attached to the outsides of A and 1B respectively by electric welding, A pair of welding regions 8a, 8b is provided between the pair of welding regions for the opposite sides 1A, 1B.
Since the notch 11 whose length in the direction substantially orthogonal to the connecting direction is longer than the diameter of the welding regions 8a and 8b forming the pair, the plate-shaped holder 4 on the opposite sides 1A and 1B of the frame 1 is provided.
It is possible to obtain a color selection device in which the tension of the filament 10 at the mounting portion of the above does not easily decrease.

T _{2 in} FIG. 5 shows the characteristic of the tension with respect to the many filaments 10 of the frame 1 at the image position in the direction substantially orthogonal to the many filaments 10 in the 20-inch type color cathode ray tube, and generally, Although the tension tends to decrease at the image position in the central portion, the decrease in tension at the mounting position of the holder 4 (around 60 mm from the left end of the frame 1) is improved as compared with the conventional example. Therefore, the tension curve T ₂ is line symmetrical.

[0020]

According to the present invention described above, a large number of filaments are stretched so that a large number of slits are formed between the opposite sides of the frame, and a color selection device is provided on each outer side of the opposite sides of the frame. In a color selection device in which plate-shaped holders for mounting and holding in a tube body of a color cathode ray tube are mounted by electric welding, the pair of plate-shaped holders are provided between the welding regions forming a pair with the opposite sides of the frame. Since the length in the direction substantially orthogonal to the direction of connecting the formed welding regions is longer than the diameter of the welding region forming the pair (notch or through hole), the plate holder and the frame of the plate during electric welding are formed. The current flowing between the opposite sides is reduced, so that the heating of that part is reduced and the tension of the filaments in the vicinity is less likely to decrease,
In addition, since the rigidity of the plate-shaped holder near the frame mounting portion is reduced, the frame 1 may be damaged during the heat treatment process of the color cathode ray tube.
The material is not easily deteriorated, and the tension of the filament near the mounting portion of the holder 4 is less likely to decrease. For this reason, the deterioration of the image quality of the screen of the color cathode ray tube due to the partial decrease in the tension of many filaments is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a holder according to a first embodiment attached to a frame.

FIG. 2 is a front view showing a plate that constitutes the holder according to the first embodiment.

FIG. 3 is a perspective view showing the holder according to the second embodiment attached to a frame.

FIG. 4 is a front view showing a plate that constitutes a holder according to a second embodiment.

FIG. 5 is a curve diagram showing tension characteristics of filaments.

FIG. 6 is a perspective view showing a color selection electrode.

FIG. 7 is a perspective view showing a conventional holder attached to a frame.

[Explanation of symbols]

 1 Frame 1A Frame Opposing Side 1B Frame Opposing Side 2 Mask 3 Damper Wire 4 Holder 4a Plate 4b Plate 4c Through Hole 5 Spring 6 Damper Spring 7 Arm 8a Welding Area 8b Welding Area 11 Notch

Claims (3)

[Claims] 1. A plurality of filaments are stretched so that a large number of slits are formed between opposite sides of a frame, and a color selection device is provided inside each of the opposite sides of the frame in a color cathode ray tube. In a color selection device in which plate holders to be attached to and are held by electric welding are respectively attached, the plate holder is connected to the pair of welding regions between the pair of welding regions with respect to the opposite sides of the frame. A color selection device, characterized in that a length in a direction substantially orthogonal to the direction is provided with an absent portion that is longer than the diameter of the welding region forming the pair. 2. The color selection device according to claim 1, wherein the lacking portion is a notch. 3. The color selection device according to claim 1, wherein the lacking portion is a through hole.