JPH0743932Y2 - Cathode ray tube with explosion-proof band - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube provided with an explosion-proof band, and more particularly to a cathode ray tube provided with an explosion-proof band having an improved effect of closely fixing the explosion-proof band.

[0002]

2. Description of the Related Art Generally, in a cathode ray tube, an explosion-proof band 30 is attached to the side surface of the edge of a panel 20, as shown in FIG. The explosion-proof band 30 is cracked by a strong external impact applied to the cathode ray tube that maintains a high vacuum state.
When the ack occurs, this crack is adopted to prevent the crack from expanding to the peripheral portion and to prevent the cathode ray tube 10 from being imploded.

The conventional explosion-proof band 30 is made of a metal band having high tensile strength, and the lugs 34 are welded and fixed to the four corners of the band-shaped body. The explosion-proof band 30 has a side surface (bent surface: hereinafter referred to as a bending surface) 21 of the panel 10.
On the other hand, it is bent (bent) with a high tensile force.
The explosion-proof band 30 has a rectangular cross-sectional shape as shown in FIG.
The explosion-proof band 30 slides against a smooth glass surface, and the explosion-proof band 30 is heated at a high temperature during mounting.
However, an adhesive tape T for preventing direct contact with the bending surface 21 is interposed.

Since the explosion-proof band 30 has a substantially rectangular cross section and is processed so that its surface is very smooth, the bending surface 21 is bonded by the adhesive tape T.
Even if it is indirectly attached to the adhesive tape T, it will slip with respect to the adhesive tape T or the bending surface 21. In particular, if a high tensile force is applied to the body, the portion closer to the body surface is stretched more than the center portion, so that the adhesion effect to the bending surface is reduced, and thus the explosion-proof effect is obtained. Is weakened.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve the adhesion and fixing state of the explosion-proof band to the bending surface, and to improve the implosion phenomenon effectively. To provide.

[0006]

In order to achieve the above object, in the invention of claim 1, an explosion-proof band is attached to the bending surface around the side surface of the panel, and an adhesive tape is provided between the bending surface and the explosion-proof band. In the cathode ray tube provided with the explosion-proof band provided, the explosion-proof band has an inner surface substantially
It has an arc shape, and the edge is thicker than the center,
The inner surface penetrates the adhesive tape and the bend
Characterized by having a plurality of protrusions that come into contact with the ring surface.
It Further, in the invention of claim 2, the explosion-proof band is strengthened.
It is characterized by being made of a synthetic resin.

[0007]

By increasing the frictional force between the explosion-proof band and the bending surface, the movement of the relative position between the explosion-proof band and the bending surface is suppressed to the maximum.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a partial excerpt from a cathode ray tube according to the present invention in which an explosion-proof band 30 is attached to a bending surface (bending surface) 21 provided on an edge of a panel 20. The explosion-proof band 30 is indirectly attached and fixed to the bending surface 21 with the adhesive tape T interposed therebetween. At this time, a large number of protrusions 32 are formed on the inner surface 31 of the explosion-proof band 30, and a part of the protrusions 32 is embedded in the adhesive tape T. As a result, slippage between the explosion-proof band 30 and the adhesive tape T is prevented. However, even though the adhesive tape T is interposed between the explosion-proof band 30 and the bending surface 21, the explosion-proof band 30 and the bending surface 21 are directly connected to each other. It is attached very firmly with the effect of being attached to.

On the other hand, as shown in FIG. 4, the cathode ray tube of the present invention adopts the explosion-proof band which is more advanced than that of the above-mentioned embodiment.
The cross-sectional shape of the body of the explosion-proof band 30 has a substantially arc shape, and its inner surface 31 ′ has an arc-shaped recess. Therefore, since the area of both edges of the explosion-proof band 30 is widened, it has a high elasticity due to the high tensile force, so that the extension amount of each part of the body of the explosion-proof band is uniform and the inner surface of the band is evenly adhered. And the contact surface is enlarged. That is, when a tensile force is applied, the edge portion of the strip-shaped body portion that is significantly stretched by this tensile force is thicker than the central portion thereof, so that unbalanced extension is suppressed as much as possible and the protrusion of the body is also increased. Both edges will also be elastically deformed, and the state of close contact with the bending surface will be further solidified.

In the case of such an embodiment, a very stable and reliable mounting effect is brought about by the frictional force increasing effect by the projection and the arched sectional shape of the body which further increases this effect.

[0011]

As described above, the consideration of claim 1
In the proposal, the inner surface of the explosion-proof band has a substantially arc shape and the edge is
The part is thicker than the central part
Then, when a high tensile force is applied to this explosion-proof band,
Is more displaced than the edges, and both edges are
The area becomes large. As a result, the explosion-proof band bending
Adhesion to the surface is improved and explosion-proof band and adhesive tape tube
Is prevented from slipping, and multiple protrusions are adhesive tape
To press the bending surface strongly through the hole of
Explosion-proof band adheres very firmly to the bending surface
The effect is that the explosion-proof band and the bending surface are directly attached. The cathode ray tube having the explosion-proof band according to the present invention is not limited by the material of the explosion-proof band described above. Since the panel is more stable than the metal on the bending surface, the conventional adhesive tape having the above-mentioned technical structure of the present invention for attaching and fixing the explosion-proof band to the bending surface may be unnecessary.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a conventional cathode ray tube.

FIG. 2 is a sectional view taken along line II-II of FIG.

3 is a cross-sectional view showing a cross-sectional shape of the explosion-proof band according to the present invention, which is a drawing corresponding to FIG. 2;

FIG. 4 is a sectional view showing a sectional shape of an explosion-proof band according to another embodiment of the present invention.

[Explanation of symbols]

 20 panel 21 bending surface (bent surface) 30 explosion-proof band 31, 31 'inner surface 32 protrusion

Claims (2)

[Scope of utility model registration request] 1. A cathode ray tube comprising an explosion-proof band , wherein an explosion- proof band is attached to a bending surface around a side surface of a panel, and an adhesive tape is provided between the bending surface and the explosion-proof band. Has a substantially arc shape and has an edge
Is thicker than the central part, and the inner surface is the adhesive tape.
A plurality of protrusions penetrating the loop and contacting the bending surface.
Cathode having an explosion-proof band characterized by having
Line tube. 2. The explosion-proof band is made of a reinforced synthetic resin.
The explosion-proof band according to claim 1, characterized in that
Cathode ray tube.