JPH04105448U - Explosion-proof cathode ray tube - Google Patents

Abstract

(57) [Summary] [Structure] A protrusion 3a is provided on the inner surface of the fastening band 3 to press the outer peripheral surface of the panel. [Effect] It is possible to prevent displacement of the fastening band 3 and maintain dimensional accuracy from the "Z" point on the panel face to the mounting bracket 4, and at the same time, it is possible to provide an explosion-proof cathode ray tube with good explosion-proof properties.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to explosion-proof cathode ray tubes. Regarding explosive cathode ray tubes.

0002

[Conventional technology]

In cathode ray tubes, implosion due to mechanical or thermal shock and accompanying glass damage occur. Explosion-proof treatment has been applied to prevent explosion-proofing and protect television viewers. prevention Most blast treatments are carried out using the side reinforcement method, but among these methods, the most recently adopted The shrink-fitting method has come into use. This shrink fitting method is shown in Figure 5. , a certain tension is applied to the side surface of the cathode ray tube panel 1a via adhesive or adhesive tape 2. This is a method in which a fastening band 3 with force is attached. The material of the fastening band 3 is Usually stainless steel or mild steel is used, but mild steel is used because of its material cost advantages. The adoption rate is high, and this trend is expected to increase in the future.

0003 Here, an overview of the shrink-fitting method will be explained.

0004 It has a circumference 0.3 to 0.5% shorter than the side circumference of the cathode ray tube panel 1a, and The fastening band 3, which is formed in a frame shape with a shape almost similar to the surface, is connected to a gas burner, a high frequency coil, etc. Or heat it to 500-600℃ using an energizing method, etc., and After inflating for a long time, adhesive or adhesive tape is wrapped around the side of panel 1a. Insert the tube, then cool it to room temperature, generate tension in the fastening band 3, and tighten the band. This method presses the flannel 1a to prevent implosion of the cathode ray tube.

[0005]

[Problem that the idea aims to solve]

Normally, the fastening band 3 is installed on the mold match line 1c on the side of the panel 1a. However, the front side from mold match line 1c is exposed from the receiver housing. In the so-called push-through type, the fastening band 3 is It must be installed closer to the funnel 1b than the cold match line 1c. on the other hand , the shape of the side surface of the cathode ray tube panel 1a has the mold match line 1c as its apex. It has a tapered shape. Therefore, after heating and inserting the fastening band 3, it is necessary to cool it down. At this time, as the panel 1a comes into close contact with the funnel 1b, it slips in the direction of the funnel 1b. The disadvantage was that it could not be fixed in the desired position.

[0006] Normally, the mounting position of the fastening band 3 or mounting bracket 4 of the cathode ray tube is Determine the dimensions up to the "Z point", which is a virtual point on the face surface of panel 1a, and set the tolerance based on this. However, if the above misalignment occurs, In some cases this is not possible. Furthermore, if the fastening band 3 is not in the fixed position, However, there was a problem in that the explosion-proof properties of the cathode ray tube also deteriorated.

[0007] The purpose of the present invention is to prevent the fastening band 3 from slipping so that it does not interfere with the receiver housing. This made it possible to ensure proper mating and also maintain the explosion-proof properties of the cathode ray tube. Our goal is to provide explosion-proof cathode ray tubes.

[0008]

[Means to solve the problem]

This invention is an explosion-proof Braun tube that attaches a fastening band to the panel side of the tube. In the pipe, the inner surface of the fastening band has protrusions and uneven grooves that press the outer peripheral surface of the panel. Provide one or the other.

[0009]

【Example】

Next, embodiments of the present invention will be described with reference to the drawings.

0010 Figure 1 is a perspective view of a fastening band according to the first embodiment of the present invention, and Figures 2 (a) and (b) are diagrams. FIG. 1 is a developed view of the fastening band No. 1, in which (a) is a side view and (b) is a cross-sectional view.

[0011] In the first embodiment, as shown in FIG. 2, one side of the fastening band 3 is press-processed. Protrusions 3a are provided in advance, and the fastening band 3 is placed with the machined surface inside, as shown in Figure 1. As shown, it is molded into a similar shape to the cathode ray tube panel, and the mounting bracket 4 is fixed by welding. to be determined.

0012 FIG. 5 is a sectional view of the fastening band shown in FIG. 1 attached to a cathode ray tube panel.

[0013] Attachment of the fastening band 3 to which the mounting bracket 4 is fixed to the side circumferential surface of the cathode ray tube panel 1a. As shown in FIG. The fastening band 3 shown in FIG. Ru. As the temperature of the fastening band 3 returns to normal, it becomes perpendicular to the peripheral surface of the panel 1a. At the same time that the force in the direction (A direction in Figure 5) is applied, the side peripheral surface of the panel 1a becomes tapered. As a result, a force is generated in the parallel direction (direction B in Figure 5), and as a result, force is generated in the opposite direction (direction B in Figure 5). (C direction in 5).

[0014] However, the protrusion 3a provided on the inner surface of the fastening band 3 does not adhere to the adhesive of the adhesive tape 2. The fastening band 3 is installed in the specified position by suppressing the force that may cause slippage due to biting. It becomes possible to wear it.

[0015] In this embodiment, the protrusions 3a are provided all around the inner surface of the fastening band 3, but the protrusions 3a are provided at the four corners. In other words, it was confirmed that it was sufficiently effective even if it was installed only on the inner surface of the 4th part of the mounting bracket. ing.

[0016] FIG. 3 is a perspective view of a fastening band according to a second embodiment of the present invention, and FIGS. 4(a) and 4(b) are diagrams. In the developed view of the fastening band No. 3, (a) is a side view and (b) is a sectional view.

[0017] In the second embodiment, as shown in FIG. 4, one surface of the fastening band 3 is knurled. Make the unevenness in advance by machining, and place the fastening band 3 with the machined surface inside, as shown in Fig. 3. As shown, it is molded into a similar shape to the cathode ray tube panel, and the mounting bracket 4 is fixed by welding. to be determined.

[0018] Attaching the fastening band 3 with the mounting bracket 4 fixed to the side of the cathode ray tube panel 1a The order is the same as in the first embodiment, and the effect is also the same as in the first embodiment.

[0019]

[Effect of the idea]

As explained above, the present invention has a protrusion 3a or a recess on the inner surface of the fastening band 3. By providing the protrusion 3b, the fastening band 3 is prevented from shifting and the panel 1a face is It is possible to maintain the dimensional accuracy from the "Z point" on the surface to the mounting bracket 4. Sometimes, it has the effect of being able to provide explosion-proof cathode ray tubes with good explosion-proof properties. Ru.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fastening band according to a first embodiment of the present invention.

FIG. 2 is a developed view of the fastening band of FIG. 1;

FIG. 3 is a perspective view of a fastening band according to a second embodiment of the present invention.

FIG. 4 is a developed view of the fastening band of FIG. 3;

FIG. 5 is a sectional view of the fastening band of FIG. 1 attached to a cathode ray tube panel.

[Explanation of symbols]

1a panel 1b Funnel 1c mold match line 2 Adhesive tape 3 Fastening band 3a Protrusion 3b Unevenness 4 Mounting bracket

Claims (1)

[Scope of utility model registration request] 1. An explosion-proof cathode ray tube in which a fastening band is attached to the panel side circumferential surface of the cathode ray tube, characterized in that an inner surface of the fastening band is provided with one of a protrusion and an unevenness that press the outer circumferential surface of the panel. Shaped cathode ray tube.