JPH0713159Y2 - Explosion-proof CRT - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an explosion-proof type cathode ray tube.

[Conventional technology]

FIG. 2 shows, for example, the invention of the same applicant, Japanese Patent Application No. 60-270396.
It is a side view of the conventional explosion-proof type cathode ray tube shown in the specification "cathode ray tube". In the figure, (1) is a cathode ray tube main body, (2) is a reinforcing frame mounted so as to cover the outer surface of the cathode ray tube main body (1), (3) is a joint seam of the reinforcing frame,
(4) is a band wound while applying tension to the reinforcing frame.

In order to enhance the explosion-proof property of the cathode ray tube, it is necessary to apply a compressive force to the surface of the cathode ray tube. This compressive force can be given by the tension at the time of winding the band (4), and since the winding of the band is performed through the divided reinforcing frame (2), the tightening force of the band is It is possible to transmit evenly to the circumference of the CRT without concentrating only on the width and corners.

[Problems to be solved by the invention]

The conventional explosion-proof type cathode ray tube is configured as described above, and there is a gap in the joint seam with the reinforcing frame, and the surface pressure due to the tension of the band cannot be sufficiently transmitted to that portion, and the front side of the cathode ray tube body There is a high possibility that a crack will occur and the seam of the reinforcing frame will progress. In that case, there was a problem that the cracks would go straight to the rear part of the CRT body, resulting in implosion.

The present invention has been made in order to solve such a problem, and an object thereof is to obtain an explosion-proof cathode ray tube with improved explosion-proof performance.

[Means for solving problems]

The explosion-proof cathode ray tube of the present invention is a reinforcement frame having an associative seam mounted so as to cover the outer surface of the main body, and an explosion-proof cathode ray tube having a band for winding the reinforcing frame by applying tension to the saw-tooth blade. It is in mesh with each other.

[Action]

Since the joint seam of the reinforcing frame in this invention is meshed with a saw blade, even if there is a gap in the seam,
Even if cracks in various directions generated from the front surface of the cathode ray tube body propagate into the above-mentioned seam of the reinforcing frame, the progress of the crack is hindered at any part of the saw blades that are meshed with each other. The crack is prevented from propagating beyond the butt joint seam to the rear portion of the cathode ray tube body and prevents implosion.

〔Example〕

FIG. 1 is a side view of an explosion-proof type cathode ray tube according to an embodiment of the present invention, in which (1) to (4) are the same as those in FIG. That is, since the seam (3) of the reinforcing frame (2) is meshed like a saw blade, the crack generated from the front surface of the CRT body (1) propagates to the seam (3) of the reinforcing frame (2). With respect to the straight crack, however, the resistance transmitted through the reinforcing frame (2) due to the surface pressure of the band suppresses the straight crack, and the straight crack is difficult to straighten. In other words, even if there is a gap in the seam, the seam is meshed in a sawtooth shape, so even if cracks in various directions propagate to the inside of the seam, any part of the meshed saw blade will crack. The progress is hindered, the crack is hard to propagate to the rear part of the CRT body beyond the butt joint seam, and the possibility of implosion is low. That is, the explosion-proof performance is further improved.

[Effect of device]

As described above, in the present invention, in the explosion-proof cathode ray tube including the reinforcing frame having the joint seam mounted so as to cover the outer surface of the main body and the band for winding the reinforcing frame by applying tension, the saw seam is provided. An explosion-proof type cathode ray tube with improved explosion-proof performance can be obtained by using a blade-shaped meshed member.

[Brief description of drawings]

FIG. 1 is a side view of an explosion-proof cathode ray tube according to an embodiment of the present invention, and FIG. 2 is a side view of a conventional explosion-proof cathode ray tube. In the figure, (1) is a cathode ray tube main body, (2) is a reinforcing frame, (3) is a joint seam, and (4) is a band. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Tokio Fukunaga 8-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Sanryo Electric Co., Ltd. Central Research Laboratory (56) References 52-35961 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An explosion-proof cathode ray tube comprising a reinforcing frame having an associative seam mounted so as to cover the outer surface of the main body and a band for winding the reinforcing frame by applying tension to the reinforcing frame, the associative seam having a saw-toothed blade shape. Explosion-proof type cathode-ray tube characterized by meshing.