JP3229493B2 - Reinforced cathode ray tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced cathode ray tube having explosion-proof reinforcement, and more particularly to a structure of a reinforced color cathode ray tube.

[0002]

2. Description of the Related Art In a cathode ray tube such as a television receiver, when a cathode ray tube is subjected to an external impact, various reinforcements are provided to alleviate the impact and prevent the glass from being scattered at the time of implosion. Measures have been taken. As a measure for this reinforcement, for example, as shown in FIG.
A metal ring 102 for reinforcement is arranged on the outer peripheral portion of the side surface of the substrate, and a resin tape 103 as a metal ring buffer adhesive is interposed between the metal ring 102 and the glass panel 101, as shown in FIG. As described above, there is a method in which a reinforcing plastic sheet 105 is attached via a pressure-sensitive adhesive to a range including the effective screen of the face plate 104 and covering the vicinity of the peripheral curved portion (JP-A-52-87353). No.).

[0003]

However, in the above-mentioned conventional structure, the effect is great when the face plate is spherical or cylindrical, but when the glass panel has a uniformly flat face plate. The vacuum stress applied to the valve itself is higher than that of the spherical or cylindrical type due to the shape of the face plate,
As a result, it becomes weak against external impact.
Thus, in the case of a glass panel having a uniformly flat face plate, a metal ring for reinforcement is arranged on the outer peripheral portion of the side surface of the glass panel, and a resin tape is interposed between the metal ring and the glass panel. Only by doing so, the reinforcing effect is small, and as a result, it is difficult to prevent glass scattering at the time of implosion and to meet safety standards such as the Electrical Appliance and Material Control Law, UL and CSA. In addition, in the method in which the plastic sheet is adhered to the area that covers up to the vicinity in contact with the peripheral curved portion of the face plate, the reinforcing effect is small, and as a result, the glass panel is broken from the peripheral portion of the plastic sheet during implosion, Since the plastic is sucked into the bulb, glass scattering cannot be prevented.

The present invention solves the above-mentioned problems in the prior art by preventing the glass from being scattered at the time of implosion in a glass panel having a uniformly flat face plate and reducing the cost. An object is to provide a reinforced cathode ray tube.

[0005]

Means for Solving the Problems] To achieve the above object, the configuration of the reinforced cathode ray tube according to the present invention, a glass panel having a uniform planar faceplate, which is connected to the rear of the glass panel A reinforced cathode ray tube including a glass funnel and a reinforcing metal ring disposed on the outer peripheral portion of a side surface of the glass panel, and a resin covering the surface of the face plate and the reinforcing metal ring. characterized by being adhered by tacky <br/> Chakuzai the sheet on the glass panel and the front Kiho strong metal ring member.

[0006]

[0007] The in this onset Ming configuration, as the resin sheet is preferably a film thickness used 300μm following polyethylene terephthalate or 50 [mu] m, in this case further, the cured film is formed on the surface of a polyethylene terephthalate It is preferable that a strong and hard material is added as an adhesive.

[0008]

SUMMARY OF] According to the present onset bright configuration, so as to cover the metal reinforcement ring body surface and disposed on a side surface outer periphery of the face plate of the glass panel, said resin sheet glass panel and the metal reinforcement ring Since the resin sheet is strongly adhered to the glass panel by sticking it to the body with an adhesive, the face plate and the outer periphery of the front surface of the glass panel are completely reinforced by the resin sheet and the reinforcing metal ring. You. Therefore, even if the cathode ray tube receives an external impact and implodes, it does not scatter on the front surface of the glass panel. As a result, the Electric Appliance Control Law,
Safety standards such as L and CSA can be sufficiently satisfied. Also, since the resin sheet can be replaced, if defects such as scratches occur on the surface of the face plate after attaching the resin sheet, it can be easily reproduced by simply peeling off the resin sheet. As a result, cost can be reduced.

[0009]

Further, in the present onset Ming configuration, as the resin sheet, according to a preferred configuration of film thickness using a 300μm following polyethylene terephthalate or 50 [mu] m, it has a moderate hardness and yabukita during implosion And bend and paste can be easily performed. In this case, furthermore, according to a preferred configuration in which a cured film is formed on the surface of polyethylene terephthalate, and a viscous and hard material is added as an adhesive,
The hardness of the resin sheet can be further increased, and the resin sheet can be strongly bonded.

[0011]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. (Embodiment 1) FIG. 1 is a side view showing one embodiment of a reinforced cathode ray tube according to the present invention. As shown in FIG. 1, the outer shape of the cathode ray tube 1 is constituted by a glass panel 3 having a uniformly flat face plate 2 and a glass funnel 4 connected to the rear of the glass panel 3 by a low expansion glass 5. ing. A reinforcing metal ring 6 is shrink-fitted to the outer peripheral portion 8 of the side surface of the glass panel 3. The outer surface 8 and the surface 8 of the face plate 2 of the glass panel 3
The resin sheet 7 is adhered to the glass panel 3 and the reinforcing metal ring 6 with an adhesive described later so as to cover the reinforcing metal ring 6 arranged in the above.

The resin sheet 7 has a thickness of 100 μm and has a size that surrounds the face plate 2 and covers the metal ring 6 for reinforcement, and its expanded shape is, as shown in FIG. The cross is cut out. The material of the resin sheet 7 is polyethylene terephthalate, and its surface is subjected to a curing treatment by applying a coating such as a transparent silicon range made of monomethylpolysiloxane. In addition, as the pressure-sensitive adhesive, a strong pressure-sensitive and hard material such as an acrylic resin or a silicone resin is used. A 1 kg pencil scratch test was performed on the resin sheet 7 having the above configuration.
H or higher strength could be secured.

As described above, the resin sheet 7 is adhered to the glass panel 3 so as to cover the reinforcing metal ring 6 disposed on the surface of the face plate 2 and the outer peripheral portion 8 of the side surface of the glass panel 3. The resin sheet 7 is strongly adhered to the glass panel 3. For this reason, the face plate 2 and the outer peripheral portion 8 on the front surface of the glass panel 3
And the metal ring 6 for reinforcement. The adhesive strength in this case is 600 gf / 10 mm, and the tensile strength is 17
kgf / 10 mm (the test method was JIS-Z023).
7). Therefore, even when implosion occurs due to an external impact applied to the cathode ray tube 1, the glass does not scatter to the front of the panel, so that safety standards such as UL and CSA can be sufficiently satisfied. .

In the first embodiment, the resin sheet 7 made of polyethylene terephthalate has a thickness of 100 μm.
Although it is set to m, the value is not necessarily limited to this value and may be 50 μm or more and 300 μm or less. 5
If the film thickness is 0 μm or more, it will not be broken during implosion, and if the film thickness is 300 μm or less, bending and sticking can be easily performed. Further, in the case where a defect such as a scratch occurs on the surface of the face plate 2 after the resin sheet 7 is attached, the resin sheet 7 can be reproduced only by peeling it off, so that the cost can be reduced.

(Embodiment 2) FIG. 2 is a side view showing another embodiment of the reinforced cathode ray tube according to the present invention. As shown in FIG. 2, the cathode ray tube 9 is a flat plate 1
And a glass funnel 12 connected to a rear portion of the glass panel 11 by a low expansion glass 13.

The face plate 10 of the glass panel 11
The outer peripheral portion 15 is covered with the resin sheet 14. The resin sheet 14 has a film thickness of 100 μm, and its developed shape is a cross shape obtained by cutting out four corners of a rectangle as shown in FIG. The material of the resin sheet 14 is polyethylene terephthalate, and a hardening process is performed on the surface by applying a coating such as a transparent silicon range made of, for example, monomethylpolysiloxane. Also,
As the adhesive, use is made of a highly viscous and hard material such as an acrylic resin or a silicone resin. When a 1 kg pencil scratch test was performed on the resin sheet 14 having the above-described configuration, a strength of 3 H or more could be secured.

The reinforcing metal ring 1 is placed on the resin sheet 14.
6 is thermally expanded and shrink-fitted to the outer peripheral portion 15 of the side surface of the glass panel 11. Then, the resin sheet 14 is strongly adhered to the reinforcing metal ring 16 by the heat of the reinforcing metal ring 16. Therefore, the face plate 10 and the outer peripheral portion 15 on the front surface of the glass panel 11 are further completely reinforced by the resin sheet 14 and the reinforcing metal ring 16. Therefore, even when the cathode ray tube 9 is subjected to an external impact to cause implosion, the glass does not scatter to the front of the panel. Therefore, safety standards such as the Electrical Appliance and Material Control Law, UL, and CSA must be sufficiently satisfied. Can be satisfied. Further, since the resin sheet 14 is formed between the reinforcing metal ring 16 and the glass panel 11, the resin sheet 14 serves as a buffer adhesive which has conventionally been interposed between the reinforcing metal ring 16 and the glass panel. It is not necessary to use a resin tape, and as a result, cost can be reduced.

[0018]

As described in the foregoing, according to the configuration of the reinforced cathode ray tube according to the present invention, so as to cover the metal reinforcement ring body disposed on a surface and a side peripheral portion of the face plate of the glass panel, by the resin sheet was adhered by tacky Chakuzai on the glass panel and the reinforcing metal ring member, the resin sheet is strongly bonded to the glass panel,
The front face plate and the outer peripheral portion of the side surface of the glass panel are completely reinforced by the resin sheet and the reinforcing metal ring. Accordingly, even when the implosion an impact is applied from the outside occurs in the cathode ray tube, not the glass from scattering on the front of Garasupa panel, as a result, the Electrical Appliance and Material Control Law,
Safety standards such as UL and CSA can be sufficiently satisfied. Also, since the resin sheet can be replaced,
When defects such as scratches occur on the surface of the face plate after attaching the resin sheet, the resin sheet can be easily regenerated only by peeling off the resin sheet, and as a result, the cost can be reduced.

[0019]

Further, in the present onset Ming configuration, as the resin sheet, according to a preferred configuration of film thickness using a 300μm following polyethylene terephthalate or 50 [mu] m, it has a moderate hardness and yabukita during implosion And bend and paste can be easily performed. In this case, furthermore, according to a preferred configuration in which a cured film is formed on the surface of polyethylene terephthalate, and a viscous and hard material is added as an adhesive,
The hardness of the resin sheet can be further increased, and the resin sheet can be strongly bonded.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a reinforced cathode ray tube according to the present invention.

FIG. 2 is a side view showing another embodiment of the reinforced cathode ray tube according to the present invention.

FIG. 3 is a development view of a resin sheet according to the present invention.

FIG. 4 is a side view of a reinforced cathode ray tube according to the related art.

FIG. 5 is a side view of a reinforced cathode ray tube according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cathode ray tube 2 Face plate 3 Glass panel 4 Glass funnel 5 Low expansion glass 6 Reinforcement metal ring 7 Resin sheet 8 Outer peripheral part 9 Cathode ray tube 10 Face plate 11 Glass panel 12 Glass funnel 13 Low expansion glass 14 Resin sheet 15 Side Part 16 Metal ring for reinforcement 101 Glass panel 102 Metal ring 103 Resin tape 104 Face plate 105 Plastic sheet for reinforcement

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01J 29/87 H01J 29/89

Claims (3)

(57) [Claims] 1. A glass panel having a uniformly flat face plate, a glass funnel connected to a rear portion of the glass panel, and a reinforcing metal ring disposed on an outer peripheral portion of a side surface of the glass panel. Wherein a resin sheet is stuck to the glass panel and the reinforcing metal ring with an adhesive so as to cover the surface of the face plate and the reinforcing metal ring. Reinforced cathode ray tube. 2. A resin sheet having a thickness of 50 μm or more.
Use polyethylene terephthalate of 300 μm or less
The reinforced cathode ray tube according to claim 1 . 3. A hard surface of polyethylene terephthalate.
Film, and add a viscous and hard material as an adhesive
The reinforced cathode ray tube according to claim 2 .