KR950006436Y1 - Band of crt - Google Patents

Abstract

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Description

Explosion proof band for color cathode ray tube

1 is a cross-sectional view showing that the explosion-proof band according to the present invention is mounted on a panel.

FIG. 2 is a perspective view showing in more detail the portion within the dashed line of FIG. 1. FIG.

3 is a cross-sectional view showing that a conventional explosion-proof band is mounted on a panel.

4 is a perspective view showing the dotted portion of FIG. 3 in more detail.

* Explanation of symbols for main parts of the drawings

4: band 8: rug

10 hole 81 fastener

82: protrusion 83: base

The present invention relates to an explosion-proof band for color cathode ray tubes, and more specifically, to adopt a type of separating the band and the ear, thereby preventing glass damage by the welding tee, reducing the positional distribution of the ear, and reducing the manufacturing cost. The invention relates to an explosion-proof band for color cathode ray tubes.

In general, a cathode ray tube is composed of a panel in which a shadow mask and a fluorescent film are formed, a funnel to which an anode voltage is applied, and a neck in which an electron gun is inserted and connected to an external electrode, and the aforementioned components are attached to a conventional pleat and collectively referred to as bulbs.

The bulb is hermetically sealed at a high vacuum of about 10 ^-6 Torr, and the panel and the funnel generate a compressive force to be contracted into the bulb so that the panel is sensitive to external shocks. Not only is the thickness thickened, but the convex curvature is provided to offset the stress of the panel due to the compressive force.

Here, as described above, in order to prevent the bulb from being deflated due to the pressure difference between the inside and the outside when an external impact is applied to the panel surface, the width of the bulb is covered by tightening the panel with a steel band-shaped explosion-proof band on the outer circumferential side of the rectangular panel. The axis was prevented.

The process of press-fitting the explosion-proof band to the panel is outlined. The band-shaped steel band is cut into a predetermined length, connected by normal welding, and the pressure-side member is connected by welding, and the compression member is padded and welded thereto. A band formed with a closed curve is formed in a rectangular shape and heated to a predetermined temperature, and the explosion-proof band is tightly fixed to the panel by using a so-called "shrinkage" method in which it is heated on the outer circumferential surface of the panel, cooled and compressed onto the panel.

Meanwhile, the outer circumferential surface of the explosion-proof band has an additional function of providing a lug club and a lug attached thereto so as to fix the cathode ray tube to the exterior set of the monitor.

The lug clip and the lug are generally located at the bent portions of the four explosion-proof bands, which will be described in detail with reference to the conventional explosion-proof bands along with FIGS. 3 and 4.

3 is a front view showing that the conventional explosion-proof band is mounted on the outer circumference of the cathode ray tube, and the lug clip 2 is joined to the four corners of the outer circumferential surface of the explosion-proof band 4 by welding, and the lug 6 ) Is inserted into the lug clip and welded thereto.

4 is a perspective view showing in more detail the relationship between the explosion-proof band 4, the lug clip 2 and the lug 6 in the circle of FIG. 3, wherein both side legs 21 of the lug clip 2 have an explosion-proof band. One side of the lug 6 in which the fastening hole 61 is installed and welded to (4) is provided with an explosion-proof band inserted and attached to the groove formed between the explosion-proof band and the lug clip.

The conventional explosion-proof band as described above has the advantage of strengthening the tightening force, but the use of the band and lug clip and the welding of the lug clip and lug, so that the glass is damaged by the welding tee by the welding point when welding Non-uniformity of lug height occurs due to non-uniformity of the welding point, and also has the disadvantage that the stress is reduced.

In addition, the welding process is added during the operation, which not only makes the process difficult but also bears the economic loss of using the electrode.

Therefore, the object of the present invention is to solve the shortcomings of the conventional explosion-proof band as described above, in the lugging of the explosion-proof band, by eliminating the welding process at all, to compensate for the various disadvantages caused by the welding and also lug It can provide 100% re-use as well as the explosion-proof band that can reduce the cost because it eliminates the welding process, thereby improving work efficiency and eliminating the need to use electrodes.

In order to realize the above object, in the band-shaped explosion-proof band provided on the outer circumferential side of the rectangular panel to prevent the bulb from being contracted due to the pressure difference between the inside and the outside when an external impact is applied to the panel surface, Explosion-proof band for cathode ray tube, characterized in that it consists of a band formed with a band of the hole, a protrusion formed with a fastening hole to be inserted into the hole of the band and a base which is in contact with the band facing the band. To provide.

Hereinafter, more preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing a state in which the explosion-proof band according to the present invention is mounted on the cathode ray tube, and FIG. 2 is a perspective view showing the inner circle of the dotted line of FIG. 1 in more detail.

As illustrated, the explosion-proof band according to the present invention can be seen that the band 4 and the lug 8 are separated.

As many holes 10 are inserted into the band as the lug 8 is inserted into, and the lug 8 is formed with a fastening hole 81 to be inserted into the hole 10 of the band 4. It consists of an 82 and the base part 83 which contacts the said band.

On the other hand, the base portion of the lug inserted into the corner portion and the lug inserted into both sides is made so that its curvature coincides with the curvature of the band.

In addition, the following describes a method of mounting the explosion-proof band of the present invention is configured as described above.

After cutting the band-shaped steel band 4 to a predetermined length, the holes 10 are formed on the band 4 at predetermined intervals, and the bands are connected by ordinary welding, and a closed curve The formed band 4 is formed in a rectangular shape so that the holes 10 are located at the bent portions of the four speeds, and the base surface 83 of the lug 8 is formed on the inner surface of the band. After insertion into contact, the explosion-proof band is tightly fixed to the panel by applying a conventional "Shrinkage" method of heating it to a predetermined temperature, covering the outer peripheral surface of the panel, cooling and compressing the panel.

In this way, as described above, the lugs are inserted from the inside of the band to the outside, and the base of the lug is firmly fixed between the band and the panel because the band is compressed to the panel by cooling.

Therefore, in contrast to the lugs made by conventional welding, it is possible to exclude the welding and attach it to the band, and there is no need to separately provide a lug clip for inserting the lugs.

Meanwhile, when the lug according to the present invention is inserted into the hole of the band, a simple adhesive is added to the base surface 83 of the lug 8 that comes into contact with the inner surface of the band 4 for the efficiency of the work. It can also be prevented.

The explosion-proof band and its mounting method of the present invention eliminate the conventional welding of the band and the lug so that the glass is damaged by the welding tee by the welding point during welding and the lug height is uneven due to the nonuniformity of the welding point. It can prevent the problem, and also can solve the problem that the stress is reduced and can also eliminate the difficulty of the process due to the welding process.

In addition, there is no need to use a separate lug clip to fix the lug, and since the used lugs can be recovered and reused, the production cost can be lowered.

Claims (3)

In the band-shaped explosion-proof band provided on the outer periphery of the rectangular panel to prevent the bulb from being expanded due to the pressure difference between the inside and the outside when an external impact is applied to the panel surface, a predetermined number of holes 10 are formed on the outer peripheral surface. A lug 8 composed of a band 4 having a base portion, a protrusion 82 having a fastening hole 81 formed therein so as to be inserted into a hole of the band, and a base portion 83 which is in contact with the band. Explosion-proof band for cathode ray tube, characterized in that. 2. The explosion-proof band for cathode ray tube according to claim 1, wherein the curvature of the base surface (83) of the lug (8) is approximately equal to the curvature of the panel. 2. Explosion-proof band for cathode ray tube according to claim 1, characterized in that an adhesive means is provided on the base face (83) of the lug (8) in contact with the inner face of the band (4).