JPS6115548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a band-reinforced cathode ray tube, which is one of the means for preventing implosion of a cathode ray tube, and particularly to a mounting bracket (hereinafter referred to as a lug) for attaching the cathode ray tube to a case. This invention relates to a band-reinforced cathode ray tube that can increase the tightening force of the rim band when using metal reinforcing bodies (hereinafter referred to as rim bands) disposed at each corner.

Conventionally, this type of band-reinforced cathode ray tube
As shown in the figure, a panel 11, a funnel 12,
It has a tube body 1 consisting of a neck 13, and a "U" shape as shown in FIG. A pair of shaped rim bands 22 are attached.

As shown in FIG. 1, the pair of rim bands 22 divide the panel face 11b into upper and lower halves and insert the skirt 11a of the panel 11, and each corner has a hole for attaching the cathode ray tube.
A lug 23 provided with 4 is provided.

A tightening band (hereinafter referred to as a "tension band") 25 is further surrounded by such a structure, and is tightened with a force necessary to prevent implosion of the cathode ray tube. Both ends of the tension band 25 are overlapped with each other, and this overlap is fixed by clips 26 or spot welding.
In this way, the tension band 25 attached to the skirt 11a of the cathode ray tube panel 11 reinforces the skirt 11a of the cathode ray tube panel 11.

In the above-described configuration, the collapse force of the cathode ray tube glass that occurs when the cathode ray tube implodes varies depending on the size of the cathode ray tube.
The residual tension P of 5 must be balanced against the collapsing force of the glass.

However, when attaching the tension band 25, conventionally the lugs 23 are fixed to each corner of the rim band 22 by spot welding and are formed in pairs with the rim band 22. As shown in the figure, depressions 31a and 31b are formed on the outer wall of the lug 23 and the inner wall of the rim band 22 by the electrode tips during spot welding.
"Front scattering" occurs at the end portions of the depressions 31a and 31b, and due to this "front scattering" occurring on the rim band 22 side, when the tension band 25 is attached, the adjoining adhesive tape 21 damaged,
Furthermore, the skirt 1 of the adjacent panel 11
There was a drawback that the glass of 1a was damaged.

That is, the greater the tightening force of the tension band 25, the more remarkable this phenomenon becomes. This means that the tightening force of the tension band 25 cannot counteract the collapsing force of the glass, which varies depending on the size of the cathode ray tube.

In this way, when the lugs 23 and the rim band 22 are integrated into one piece by spot welding, the tightening force of the tension band 25 is inevitably limited by the tear strength of the attached adhesive tape 21, and the size There was a drawback that it could not be applied to various cathode ray tubes with different characteristics.

As a method to eliminate this drawback, the "front scattering" that occurs when the lugs 23 and the rim band 22 are spot welded is removed after they are combined into a pair. Alternatively, it is possible to combine the lugs 23 and the rim band 22 into a pair using adhesive, without changing the shape of the inner wall of the rim band 22, but removing these after they have been integrated would increase the number of steps required to manufacture the rim band. It is impractical to use adhesive, and there is a risk that the adhesive will come out when the tension band 25 is attached.

Therefore, this removal was very difficult in terms of workability, and the reliability was also poor due to vibration and falling when the tension band 25 was fixed.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and it is possible to prevent damage to the adhesive tape due to "friction" on the inner wall of the rim band caused by spot welding the lugs and the rim band. The purpose of the present invention is to provide a band-reinforced cathode ray tube that is excellent in preventing implosion by attaching a tape with superior tear strength different from the adhesive tape attached to the tube and making it capable of sufficiently responding to the tightening force of a tension band. .

Embodiments of the band-reinforced cathode ray tube of the present invention will be described below with reference to the drawings, but before explaining the specific embodiments, first, the relationship between the above-mentioned tension band and "front scattering" will be described. .

Tension band 25 is tightened around the skirt 11a of the cathode ray tube panel 11.
The residual tension must be compatible with the collapsing force of the cathode ray tube glass that occurs when the cathode ray tube implodes; however, as mentioned above, it is tightened by the tear strength of the adhesive tape 21 interposed on the inner wall of the rim band. The force of the tension band 25 is necessarily limited.

However, if damage to the adhesive tape due to "friction" that occurs on the inner wall of the rim band can be prevented, the tightening force of the tension band can be significantly increased. In other words, it is sufficient to interpose a tape having sufficient strength to cope with the tightening force of the tension band, which is tightened only at the "outward" portion that occurs on the inner wall of the rim band 22.

Next, an embodiment of the band-reinforced cathode ray tube of the present invention will be described based on the drawings. FIG. 4 is a sectional view showing the configuration of the main part of one embodiment, and this FIG. 4 is a sectional view of a portion corresponding to the section taken along line A-A' in FIG. The same parts as in FIG. 3 will be given the same reference numerals and their explanation will be omitted, and the newly added parts in FIG. 4 will be mainly described.

In FIG. 4, a tape 41 with excellent tear strength (for example, glass fiber tape) is used to completely cover the concave end portion 31a created by the electrode tip when the lug 23 on the inner wall portion of the rim band 22 is spot welded. ) is interposed between the rim band 22 and the adhesive tape 21.

In other words, damage to the adhesive tape due to "scattering" of the inner wall of the rim band 22 when tightening the tension band 25 can be sufficiently prevented by selecting the intervening tape, and the tightening force of the tension band 25 can be significantly increased. It can also be applied to cathode ray tubes with sufficiently different shapes.

In the above embodiment, the rim band 22 is attached in advance to the outer peripheral wall of the skirt 11a of the panel 11 of the cathode ray tube using the adhesive tape 21, but the present invention is not limited to this. An adhesive such as a curable resin may be used when attaching the rim band.

As described above, according to the band-reinforced cathode ray tube of the present invention, only the depressions caused by the electrode chips that occur when the lugs on the inner wall of the rim band are welded are covered with a tape with excellent tear strength, and the tension band is used. Since the skirt of the panel of the cathode ray tube is tightened, the tightening force of the tension band can be greatly increased, and a cathode ray tube with excellent implosion prevention can be obtained.

Furthermore, the work of tightening the tension band can be facilitated, and reliability can be improved against vibration and falling when the tension band is fixed.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a conventional band-reinforced cathode ray tube, Fig. 2 is a perspective view showing a rim band with lugs arranged at each corner of the band-reinforced cathode ray tube of Fig. 4 is a sectional view taken along line A-A' in the figure, and FIG. 4 is a cross-sectional view taken along line A-A' in FIG.
FIG. 1...Pipe body, 11...Panel, 11a...Skirt,
21... Adhesive tape, 22... Rim band, 23... Lug, 24... Hole, 25... Tension band, 31
a, 31b...indentation, 41...tape, and the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A pair of rim bands surrounding the skirt of a cathode ray tube panel and having lugs for attaching the cathode ray tube to a predetermined location, a first adhesive interposed between the rim band and the outer peripheral wall of the skirt. a member, a tension band that surrounds and tightens the outer circumferential surface of the rim band, and a tension band that is interposed between the first adhesive member and the inner wall portion of the rim band only at the portion where the lug is provided; is a band-reinforced cathode ray tube comprising a different second adhesive member. 2. The band-reinforced cathode ray tube according to claim 1, wherein the second adhesive member is a glass fiber tape.