JPS6258553A - Reinforcing structure for cathode-ray tube - Google Patents

Abstract

PURPOSE:To make it possible to cope with any cathode-ray tube with one kind of band for shrinkage fitting reinforcement by providing difference of surface level at the central part of the band and making inner peripheral lengths differ at both ends of the band. CONSTITUTION:A reinforcing structure 1 is provided with difference of surface levels at its central part 1a and the inner peripheral length of one end side 1b is made larger than that of another end side 1c. In the case of large outer peripheral length of a panel, reinforcement effect is obtained by binding the moldmatch part 3 of the panel 2 with the larger part 1b of the inner peripheral length of the shrinkage fitting band which is the reinforcing structure. In the case of small outer peripheral length of the panel, the moldmatch part of the panel is bound with the shorter part 1c of the inner peripheral length of the shrinkage fitting band by changing the weld position between the shrinkage fitting band and lugs 5. Thereby shrinkage fitting reinforcement for two kinds of panels can be done with one kind of shrinkage fitting band.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the unification of specifications for reinforcement parts for cathode ray tubes, and particularly to a reinforcement structure for a cathode ray tube suitable for a cathode ray tube that undergoes shrink-fit reinforcement.

[Background of the invention]

In conventional shrink fit reinforcement, for example,
In order to obtain sufficient reinforcing strength as shown in Japanese Patent No. 53, the inner circumferential length of the reinforcing band is set depending on the outer circumferential length of the panel. In this conventional method, even for panels of the same size, if the outer circumferential lengths of the panels differ, it is necessary to prepare separate shrink-fit bands.

For example, the outer circumferential length of a single glare panel is 1 to 21 meters shorter than that of a glare panel due to etching. Therefore, two types of shrink-fit bands are required for each panel having the same nominal size, resulting in an increase in the number of five-component specifications and an increase in the unit cost of the parts. Furthermore, since the inner circumferential lengths differ by several I, there is a risk of misplacement, and there is also a problem in terms of reliability of reinforcement.

[Purpose of the invention]

An object of the present invention is to make it possible to use one type of shrink-fit reinforcing band even if there is a slight difference in panel outer circumferential length between panels of the same size.

[Summary of the invention]

By creating specifications with different inner circumference lengths within one shrink-fit reinforcing band, it becomes possible to accommodate differences in panel outer circumference lengths. Therefore, in the present invention, by adding a step to the center of the band, the inner circumference length is made different at both ends of the band, so that one band has two specifications for the inner circumference length.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The shrink-fit reinforcing band of the present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of the reinforced structure of the present invention.
The reinforced structure 1 has a step at its central portion 1a and one end side 1b.
The inner circumferential length of the inner circumference is set to be larger than the inner circumferential length of the other end side 1c. Figure 2 shows an example in which this reinforcing structure 1 is mounted on a panel.
A reinforcing effect is obtained by tightening the mold mating portion 3 of the panel 2 at b. In the figure, 4 is tape, 5
is the mounting lug.

FIG. 3 shows an embodiment of the present invention in which the outer circumferential length of the panel is small. In this case, by changing the welding position between the shrink fit band and the lug 5 from that shown in FIG. 2, the mold match portion 3 of the panel 2 is tightened at the short inner circumference portion 1c of the shrink fit band.

As described above, with one type of shrink-fit band, it is possible to shrink-fit and reinforce two types of panels: panels with long outer circumferences and panels with short panel outer circumferences.

〔Effect of the invention〕

According to the present invention, even when there are two types of differences in panel outer circumferential length in panels of the same size, this can be handled by a type of shrink-fit band.

This not only makes it possible to reduce material costs by reducing the number of bands that previously required two types, but also makes it extremely easy to determine the size of the inner circumference. It has excellent effects such as being able to be correctly installed in accordance with the size and ensuring reliability of reinforcement.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the reinforcing structure of the present invention, and FIGS. 2 and 3 are sectional views of essential parts showing examples of the reinforcing structure. 1... Reinforced structure, 2... Panel, 4... Tape,
5...Mounting lug. K≧ Agent Patent attorney Katsuo Ogawa (-i ゛,'

Claims (1)

[Claims] A reinforced annular structure for a cathode ray tube that exhibits an explosion-proof function by being engaged with a side wall of a cathode ray tube, wherein the annular reinforcing structure has a step in the width direction and has a structure in which inner circumference lengths at both ends are different. .