JPH0729500A - Shadow mask support structural body and shadow mask support structure for color cathode-ray tube - Google Patents

Abstract

PURPOSE:To significantly improve the mounting precision of a shadow mask assembly. CONSTITUTION:A support structural body 18 is formed by the adhered alloy of a spring part and a bimetal part, and this support structural body 18 is welded to the first, second and third support parts of a support frame 2. A support structural body formed of a deformed bimetal part 8 and a spring member 4 is used in the fourth support part, and only the deformed bimetal part 8 is preliminarily welded to the support frame 2. A shadow mask assembly is integrated into a panel glass 6, and the support structural body 18 of the first, second and third support parts is fitted to a stud 7 through a mounting hole 17. Thereafter, to the fourth support part, the spring member 4 is fitted to the deformed bimetal part 8 on one side, and fitted to the stud 7 on the panel glass 6 side on the other side, and the spring member 4 and the deformed bimetal part are fixed together by welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for fixing a shadow mask, which is a main component of a color cathode ray tube, to a front panel glass.

[0002]

2. Description of the Related Art Conventionally, as means for fixing a shadow mask, which is a color selection component of a color cathode ray tube, to a front panel glass, studs are provided at four places of the panel glass, and mounting holes are formed so as to be fixed to these studs. It was general to support and fix the shadow mask at four places by a support structure formed by welding a bimetal part to a spring part.

FIG. 3 is a top view showing the above-mentioned conventional general support structure. In the figure, 1 is a shadow mask, 2
Is a support frame, 3 is a bimetal part, 4 is a spring part, 5 is a mounting hole, 6 is a front panel glass, 7 is four studs provided on the panel glass 6, and 8 is a part of the bimetal part 3 as a spring. It is a modified bimetal part that is deformed for fitting parts. The bimetal component 3 and the spring component 4 constitute a support structure by being previously integrated by welding as will be described later, and are used for the first, second and third support portions.
Further, the deformed bimetal component 8 constitutes a support structure by fitting and welding the spring component 4 in a state where the spring component 4 is welded to the support frame 2 in advance in the fourth support portion as described later. FIG. 4 is a front view of a support structure used for the first, second and third support portions in the conventional example of FIG. 3, and FIG. 5 is a support structure used for the fourth support portion in the conventional example. FIG. 9 in the figure
Is the welding point of the bimetal part 3 and the spring part 4, 10
Indicates welding points of the bimetal component 3 and the support frame 2, 11 and 12 indicate deformation portions of the deformed bimetal component 8, and 13 indicates welding points of the deformed bimetal component 8 and the spring component 4.

The bimetal part 3 and the spring member 4 which form the support structure of the first, second and third support parts are
These bimetal parts 3 and spring parts 4 have welding points 9
After being welded together and integrated, the part of the bimetal part is welded to the support frame 2 at the welding point 10. On the other hand, regarding the deformed bimetal component and the spring component 4 that form the support structure of the fourth support portion, only the deformed bimetal component 8 is welded to the support frame 2 in advance at the welding point 10. Then, the shadow mask assembly thus constructed is incorporated into the panel glass 6, and the spring components 4 of the first, second and third supporting portions are fitted to the studs 7. Then, after that, the spring component 4 of the fourth support portion is fitted on the deformed bimetal component 8 on the one hand, and fitted on the stud 7 on the panel glass 6 side on the other hand, and welded to the deformed bimetal 8 at the welding point 13. .

Further, as a related technique, the actual exploitation Sho 57
-57048 discloses a spring and a bimetal bonded to each other by a clad or the like, and JP-A-62-22353 discloses that the thermal expansion of the spring is offset between the spring and the frame. The one provided with bimetal is shown.

[0006]

Since the conventional shadow mask support structure is constructed as shown in FIGS. 3 to 5, there are many welding points, for example, 16 places, which may cause variations in welding conditions and influences of jigs. It is easy to receive, the support structure consisting of spring parts and bimetal parts is tilted, and the thickness after welding is likely to vary, so the mounting accuracy is poor, and the shadow mask assembly is supported with flatness centered on the panel glass. It was difficult to do. Although the technique disclosed in the above publication is related technology, it cannot solve the above problems.

The present invention has been made to solve the above problems, and an object thereof is to greatly improve the mounting accuracy of a shadow mask assembly.

[0008]

A support structure according to the present invention is characterized in that it is formed of a joint metal comprising a metal having a spring function and a metal having a bimetal function. The shadow mask support structure of the color cathode ray tube is a support structure in which a part of the support structures is formed of a joint metal of a metal having a spring function and a metal having a bimetal function. Another support structure is a support structure that is assembled by welding a metal having a spring function and a metal having a bimetal function.

[0009]

In the present invention, since the supporting structure is formed by the double-bonded metal, the number of welding points is reduced and the mounting accuracy is dramatically improved. Further, by forming a part of the support structure by such a double jointed metal and by assembling the other by welding, the existing assembling apparatus can be used and no special investment is required.

[0010]

1 is a front view of a support structure showing an embodiment of the present invention. In the figure, 14 is a spring component,
Reference numeral 15 is a bimetal component, 16 is a welding point to the support frame, 17 is a mounting hole, and a support structure 18 is formed by a joint metal of the spring component 14 and the bimetal component.

FIG. 2 is a top view showing the support structure of this embodiment. In the figure, 1 is a shadow mask and 2 is a support frame. Support structure 1 formed of the above-mentioned joint gold
8 is welded to the first, second and third support parts of the support frame 2 at welding points 16. In addition, the fourth support portion,
A support structure similar to the conventional one shown in FIG. 5 is used,
Only the deformed bimetal part 8 is pre-welded to the support frame 2. Then, the shadow mask assembly is incorporated into the front panel glass 6, the supporting structures 18 of the first, second and third supporting portions are fitted to the studs 7 by the mounting holes 17, and then the fourth supporting portion. On the other hand, the spring member 4 is fitted on the deformed bimetal component 8 on the one hand, and is fitted on the stud 7 on the panel glass 6 side on the other hand, and the spring member 4 and the deformed bimetal component 8 are fixed by welding.

According to this embodiment, the three supporting structures can be formed by using the commercially available double-joint metal, and the welding of the spring parts and the bimetal parts is not necessary, and the welding of the six parts in total is required. It can be omitted. As a result, not only the assembling process can be simplified, but also the deterioration of the assembling accuracy accompanying the welding work can be greatly reduced. Further, when all four supporting structures are formed by the joint metal, the existing assembling apparatus cannot be used and a special capital investment is required, but in the case of this embodiment, the fourth supporting portion is not used. Since the support structure remains in its conventional form, existing assembly equipment can be utilized and no special investment is required.

In the above embodiment, the case where the double-bonded metal is used for three of the four support structures and the remaining one has a welded structure has been described, but the double-bonded metal is used. The numbers of the support structure and the support structure of the welded structure are not limited to this, and can be appropriately changed.

[0014]

As described above, according to the present invention, since the supporting structure is formed of the double-joint metal, the number of welding points can be reduced and the mounting accuracy can be remarkably improved.
In addition, by using this joint metal for part of the support structure and using the conventional welding structure that can use the existing assembly equipment for other support structures, no special investment is required. The precision with which the shadow mask assembly is attached to the panel glass can be increased.

[Brief description of drawings]

FIG. 1 is a front view of a shadow mask support structure for a color cathode ray tube according to an embodiment of the present invention.

FIG. 2 is a top view showing a shadow mask support structure for a color cathode ray tube according to an embodiment of the present invention.

FIG. 3 is a top view showing a conventional shadow mask support structure for a color cathode ray tube.

FIG. 4 is a front view of a support structure used for the first, second and third support portions in the conventional shadow mask support structure for a color cathode ray tube.

FIG. 5 is a front view of a used structure used as a fourth support portion in a conventional shadow mask support structure for a color cathode ray tube.

[Explanation of symbols]

 1 Shadow Mask 2 Support Frame 4 Spring Part 6 Front Panel Glass 7 Stud 8 Deformed Bimetal Part 14 Spring Part 15 Bimetal Part 16 Welding Point

Claims (2)

[Claims] 1. A support structure for fixing a shadow mask of a color cathode ray tube to a panel glass, the support structure being formed of a joint metal of a metal having a spring function and a metal having a bimetal function. A shadow mask support structure for a color cathode ray tube. 2. A support structure for fixing a shadow mask of a color cathode ray tube to a panel glass by a plurality of support structures, wherein some support structures are made of a metal having a spring function and a metal having a bimetal function. A shadow mask support structure for a color cathode ray tube, characterized in that the shadow mask support structure is formed of a joint metal and the other support structure is assembled by welding a metal having a spring function and a metal having a bimetal function.