JPS6110941B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray tube, and particularly to a reinforcing tension direct-view type cathode ray tube in which the tightening force of a band wound around the outer peripheral wall of a cathode ray tube panel can be directly observed.

Generally, in the manufacturing method of band-reinforced cathode ray tubes, it is essential to maintain the tension of the band within the standard value in order to ensure the reinforcing effect, but the tension of this band is confirmed for each cathode ray tube using a non-destructive method. Conventionally, as a means, Fig. 1 a, b
As shown in the figure, two wedges 3a and 3b are inserted between the outer circumferential wall of the cathode ray tube 1 and the band 2 made of band steel, and after applying tension to the band 2, the band 2 is removed from the cathode ray tube 1. Insert the tension measuring gauge 4 whose relationship between displacement position and tension has been determined in advance into this part as shown in Fig. 2 a and b, and connect the gauge 4's measuring points 4a and 4b. The tension of the band 2 was read by the scale 4c for measuring displacement. In addition, as another means, the third
As shown in the figure, a hole 2a with a predetermined size and diameter is provided in advance in a band 2 made of steel band, and the amount of displacement of the hole 2a that occurs in the tension direction when tension is applied to the band 2 is measured. A method was used to determine the tension from the relationship. Furthermore, similar to the above-mentioned means, a method was used in which a line or mark was provided on the band 2 to serve as a mark at a reference interval, and the tension was determined from the displacement of the interval after tension was applied.

However, in the former case, the tension of each cathode ray tube cannot be measured unless the wedges 3a and 3b are attached to each cathode ray tube 1. Inserting the wedges 3a and 3b has the disadvantage that it cannot be used in cathode ray tubes and the like whose external dimensions do not meet the standard. In addition, in the second and latter cases, since the amount of displacement is minute due to the nature of the band 2, a means to accurately measure the amount of displacement is prepared, and the hole 2a before tension is applied.
It is necessary to correct intra-class variations in dimensions, standard spacing dimensions, or band material, and since it is not possible to obtain such specification values for completed products using non-destructive methods, the tension of all products must be checked. It had the disadvantage that it was not useful.

Therefore, an object of the present invention is to visually check the tension applied to the cathode ray tube individually without changing the external shape or shape of the cathode ray tube, and without having to know the material of the band or other detailed specifications after completion. The purpose of this invention is to provide a CRT that can be directly viewed with reinforced tension that can be checked.

In order to achieve such an object, the cathode ray tube according to the present invention includes microcapsules containing a pigment or dye-based coloring material interposed between the outer circumferential side wall of the cathode ray tube panel and the band to apply tension to the band. Thus, the microcapsules are destroyed and colored, and the tension applied to the band can be visually observed by looking directly at the colored color. The cathode ray tube according to the present invention will be explained in detail below with reference to the drawings.

FIGS. 4a, 4b, and 4c are a side view, a sectional view, and a plan view of the essential parts, respectively, showing an example of the cathode ray tube according to the present invention. In these figures, first, microcapsules containing a pigment or dye-based coloring material (not shown) are mixed with an adhesive and uniformly applied onto a tape 5 such as cotton tape or mylar tape, and then applied to the outer peripheral wall of the panel of the cathode ray tube 1. and the band 2, and the band is reinforced by applying a tension of about 350 to 450 kg to the band 2.

Due to this structure, the tightening force generated by applying tension to the band 2 acts on the microcapsules and destroys the microcapsules, causing the pigment or dye-based coloring matter stored in the microcapsules to be removed. is colored on the tape 5. and,
The predetermined tension of the band 2 can be confirmed by visually observing the colored portion 6 on the tape 5. In this case, the tape 5 coated with microcapsules may be wrapped around the entire outer peripheral wall of the panel of the cathode ray tube 1 as a component of the reinforcing structure of the cathode ray tube 1, and may be reinforced with a band from the top surface. Alternatively, only that portion may be sandwiched between the band 2 and the cathode ray tube 1. In addition, the colored portion 6 may be confirmed by looking at the tape 5 protruding from the band 2 as shown in FIG. You may also check by looking at the colored portion 6 above. In addition, the size or breaking strength of the microcapsules can be determined by changing the coloring of the pigment or dye-based coloring material contained in the microcapsules and mixing them. Different types produce different colors, and the tension value itself can be confirmed by the difference in color.

As explained above, according to the cathode ray tube according to the present invention, the tension application status can be visually confirmed to ensure the reinforcing effect without using special gauges or measuring instruments or without knowing detailed specification values. Therefore, extremely excellent effects such as the ability to guarantee the reinforcing strength of each individual cathode ray tube can be obtained.

[Brief explanation of the drawing]

Figures 1a and b are a plan view and a side view of the main part showing an example of a conventional cathode ray tube, and Figures 2a and b are a plan view and a side view of the main part showing an example of a tension measuring gauge attached to a band. Fig. 3 is a plan view of the main part of the band with holes for tension measurement, Fig. 4 a, b, c
is a side view of a main part of a cathode ray tube according to the present invention, -
' A cross-sectional view and a plan view of the main part. 1... Braun tube, 2... Band, 2a... Hole, 3a, 3b... Wedge, 4... Gauge, 4
a, 4b... Measuring head, 4c... Scale, 5... Tape, 6... Coloring part.

Claims (1)

[Claims] 1. In a band-reinforced cathode ray tube in which a band is wound around the outer circumferential side wall of the cathode ray tube panel and tightened with great force, a pigment or dye-based cathode ray tube is provided between the outer circumferential side wall of the cathode ray tube panel and the band. A microcapsule containing a coloring material is interposed, and by applying tension to the band, the microcapsule is destroyed and colored, and the tension applied to the band can be visually observed by looking directly at the coloring. A cathode ray tube characterized by: 2. The cathode ray tube according to claim 1, wherein the microcapsules are attached to a tape using an adhesive and inserted between the outer peripheral wall of the cathode ray tube panel and the band.