JPH0249335A - Explosion-proof cathode-ray tube - Google Patents

Abstract

PURPOSE:To improve the explosion-proof performance of a cathode-ray tube by coupling a brand frame formed to suit the shape of the side wall part of a cathode-ray tube body to the aforesaid side wall part via a shrinkage fitting process. CONSTITUTION:A band frame 3 is processed into an annular shape slightly shorter than the side of a cathode-ray tube and along the shape of the side wall part 11 of a cathode-ray tube body 7. The aforesaid band frame 3 is coupled to the side wall part 11 of the cathode-ray tube body 1 and then cooled, thereby obtaining a shrinkage type explosion-proof cathode-ray tube. According to this construction, uniform and close adherence is maintained between the internal surface of the band frame 3 and the side wall part 11 upon shrinkage and the explosion-proof performance of the cathode-ray tube is enhanced.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention provides a method for attaching a band frame to the side wall of a cathode ray tube body.
Tightening is related to explosion-proof cathode ray tubes that apply force to the side walls.

[Conventional technology]

2 and 3 are diagrams showing an explosion-proof cathode ray tube shown in Japanese Patent Publication No. 54-22864, which has been conventionally used, in which 1 is the cathode ray tube body, 11 is the side wall of the cathode ray tube body 1, and 2 is the side wall portion 1 of the cathode ray tube body 1]
This is a band frame placed on the outside of the frame by shrink fitting.

As described above, as a conventional explosion-proof measure for the cathode ray tube body 1, a so-called shrink method has been adopted in which a tightening band frame 2 is shrink-fitted to the panel side wall portion 11 of the cathode ray tube body 1.

This conventional cathode ray tube is manufactured by first stretching a thin steel band frame 2 of uniform thickness with an inner circumference slightly shorter than the length of the side wall of the panel by heating and fitting it into the side wall of the cathode ray tube. The structure is such that a tightening force is applied to the panel side wall portion 11 when the frame 3 returns to normal temperature.

[Problem to be solved by the invention]

In this conventional explosion-proof cathode ray tube, when tightening the band frame, the force is concentrated on the four corners of the cathode ray tube body, and the force exerted on the side walls is small, so there is a 1gJ problem in which the explosion-proof performance cannot be fully demonstrated. there were.

This invention was made in order to eliminate the problem that the force is biased when tightening, and by applying part of the force to the side wall as pressure, it is an explosion-proof type that improves explosion-proof performance. The purpose is to obtain a cathode ray tube.

[Means to solve the problem]

In the explosion-proof cathode ray tube according to the present invention, a band frame whose entire negative surface is formed to match the shape of the side wall of the cathode ray tube body is shrink-fitted to the side wall of the cathode ray tube body.

[Effect]

Since the band frame according to the present invention is formed so that its entire surface conforms to the shape of the side wall of the cathode ray tube body, the band frame uniformly adheres to the inner peripheral surface of the band frame and the side wall of the cathode ray tube body, and the side wall of the cathode ray tube body Tightening also allows less force to be applied, improving explosion-proof performance.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. That is, in FIG. 1, 3 is formed into an annular shape slightly shorter than the side circumference of the cathode ray tube by joining by appropriate means, and is processed into a shape that conforms to the shape of the side wall 11 of the cathode ray tube body 1. It is a obi frame. Note that the other configurations are the same as the conventional ones shown in FIGS. 2 and 3, so explanations will be omitted.

A shrink type explosion-proof cathode ray tube is obtained by disposing the thus formed band frame 3 on the side wall portion 11 of the cathode ray tube body by shrink fitting and then cooling it.

Here, when cooling after shrink fitting, the entire band frame contracts as in the conventional case, and tightening force is exerted on the four corners of the cathode ray tube, but in this case, the band frame 3 Because it is processed to conform to the shape of
1 and is configured to apply pressure to the side wall 11 of the cathode ray tube body, improving explosion-proof performance.

In this embodiment, the shape of each side of the band frame is processed, but the entire circumference of the band frame may be processed.

〔Effect of the invention〕

As mentioned above, in the explosion-proof cathode ray tube according to the present invention, a band frame formed in a shape along the side wall of the cathode ray tube body is shrink-fitted to the side wall of the cathode ray tube body.
It becomes possible to apply pressure not only to the four corners of the cathode ray tube body, but also to the side walls, improving explosion-proof performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part showing an embodiment of the present invention, Figs. 2 and 3 are views showing a conventional explosion-proof cathode ray tube, Fig. 2 is a front view, and Fig. 3 is a cross-sectional view. It is a diagram. In the figure, 1 is a cathode ray tube body, 11 is a side wall portion of the cathode ray tube body 1, and 2.3 is a band frame. In addition, the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] An explosion-proof cathode ray tube comprising a cathode ray tube body and a band frame that is formed on one entire surface in accordance with the shape of the side wall of the cathode ray tube body and is shrink-fitted to the side wall of the cathode ray tube body.