JPH04136856U - cathode ray tube - Google Patents

Abstract

(57) [Summary] [Structure] Shrink-fit band 1 is provided with mating portions 2 at at least two locations. [Effect] When the shrink-fitting band 1 is cooled, the tightening stress on the panel becomes uniform, and a uniform force is applied to the shadow mask.
There is no misalignment in the positional relationship between the hole in the shadow mask and the beam, and a uniform image can be obtained.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to cathode ray tubes, particularly cathode ray tubes with explosion-proof shrink-fit bands on the panel. Regarding.

0002

[Conventional technology]

As shown in FIG. 4, the conventional shrink-fit band 11 is made of stainless steel with a uniform cross section. A single metal plate, such as stainless steel or mild steel, has the same shape as the outer circumference of the cathode ray tube panel and the inner diameter of the panel. Formed to be slightly smaller than the outside diameter, overlapped in one place or made from pieces of the same material After pasting them together to form the joint part 2, install mounting seats 3 to be attached to the cabinet at the four corners. It had a structure in which it was installed.

0003 As shown in FIG. 5, in order to fit the panel 4, the shrink-fit band 11 is heated in advance. When the shrink-fit band 11 cools and contracts, it is expanded and fitted into the panel 4. to tighten the side walls of panel 4 to reduce distortion of panel 4 caused by vacuum deformation. there was.

0004

[Problem that the idea aims to solve]

As shown in FIG. 4, the mating portion 2 of the conventional shrink-fitting band 11 is either overlapped or bonded. Because of its structure, its volume is larger than other parts, as shown in Figure 5. The shrink-fitting band 11 is fitted into the panel part, and the panel 4 is fitted in the cooling process after heating. When tightening the side walls of the The opposite side cools down quickly, resulting in uneven tightening, and is attached to the inside of panel 4. Non-uniform stress is applied to the shadow mask in the cathode ray tube during operation. A misalignment occurs in the positional relationship between the beam passing through the hole in the shadow mask and the hole in the shadow mask, and the image It has the disadvantage that it becomes non-uniform.

[0005] The purpose of this invention is to ensure that the positional relationship between the hole in the shadow mask and the beam is uniform without deviation. The object of the present invention is to provide a cathode ray tube that can provide a high-quality image.

[0006]

[Means to solve the problem]

The present invention provides a cathode ray tube having an explosion-proof shrink-fit band on the panel. A mating portion is provided at at least two places on the fitting band.

[0007]

【Example】

Next, embodiments of the present invention will be described with reference to the drawings.

[0008] FIGS. 1(a) and 1(b) are configuration diagrams of a shrink-fitting band according to the first embodiment of the present invention. a) is a front view, and FIG. 1(b) is a side view.

[0009] In the first embodiment, as shown in FIGS. 1(a) and 1(b), two By providing matching parts 2 at the points, the tightening stress of the upper and lower bands is made uniform. Ru.

0010 FIGS. 2(a) and 2(b) are configuration diagrams of a shrink-fitting band according to a second embodiment of the present invention. a) is a front view, and FIG. 2(b) is a side view.

[0011] In the second embodiment, as shown in FIGS. 2(a) and 2(b), two The entire band can be tightened by providing mating parts 2 at two locations, one on the short side and the other on the short side. Measures to equalize stress.

0012 FIGS. 3(a) and 3(b) are configuration diagrams of a shrink-fitting band according to a third embodiment of the present invention. a) is a front view, and FIG. 3(b) is a side view.

[0013] In the third embodiment, as shown in FIGS. 3(a) and 3(b), the structure of the mating portion 2 is as shown in FIG. While the second embodiment shown in a) and (b) involves bonding, in this embodiment The effect is the same as the second embodiment.

[0014]

[Effect of the idea]

As explained above, the present invention allows the shrink-fitting band 1 to have two or more matching parts 2. As a result, the tightening stress on the panel 4 when the shrink-fitting band 1 is cooled becomes uniform. , a uniform force is applied to the shadow mask, and the positional relationship between the hole in the shadow mask and the beam is This has the effect of eliminating misalignment and obtaining a uniform image.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a shrink-fitting band according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a shrink-fitting band according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a shrink-fitting band according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of an example of a shrink-fit band of a conventional cathode ray tube.

FIG. 5 is a side view of an example of a cathode ray tube equipped with a conventional shrink-fit band.

[Explanation of symbols]

1,11 Shrink-fit band 2 Joint part 3 Mounting seat 4 panel 5 Funnel

Claims (1)

[Scope of utility model registration request] 1. A cathode ray tube having an explosion-proof shrink-fit band on a panel portion, characterized in that mating portions are provided at at least two locations on the shrink-fit band.