JPH056660U - Band reinforced cathode ray tube - Google Patents

Abstract

(57) [Summary] [Object] To provide a band-reinforced cathode ray tube having a metal band, which improves the rigidity of the metal band and has an excellent explosion-proof effect. [Structure] A bulge portion 4 protruding outwardly on a flat portion of a portion of the metal band 2 in contact with the panel skirt portion 1a.
Were formed in one row or a plurality of rows along the entire peripheral wall or along the site excluding the corners.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a band-reinforced cathode ray tube.

[0002]

[Prior Art]

 FIG. 3 is a front view showing a band-reinforced cathode ray tube that has been conventionally and conventionally used. In the figure, 1 is a cathode ray tube, 1a is a panel skirt portion of the cathode ray tube 1, 2 is a metal band attached to the outside of the panel skirt portion 1a by shrink fitting, and 3 is a fitting for fixing the cathode ray tube 1.

The cathode ray tube 1 is constructed by first heating a thin metal band 2 having a uniform thickness and having an inner peripheral length slightly shorter than the outer peripheral length of the panel skirt portion 1 a to elongate the panel skirt of the brown tube 1. It is manufactured so that when the metal band 2 is fitted into the portion 1a and the temperature of the metal band 2 is returned to room temperature, a tightening force is applied to the panel skirt portion 1a.

[0004]

[Problems to be solved by the device]

 Since the conventional band-reinforced cathode ray tube is constructed as described above, the weight of the cathode ray tube 1 increases proportionally as the shape of the cathode ray tube 1 increases, and the collapsing force generated when the implosion phenomenon occurs also increases. To be done. Therefore, the tightening force by the metal band 2 also needs to be increased in opposition to each other. However, since the shape of the metal band 2 is limited by itself from the shape of the panel skirt portion 1a with which it abuts, there is a problem that it cannot be applied to a larger size because the shape cannot obtain a tightening force capable of competing with each other.

The present invention has been made to solve the above problems, and it is an object of the present invention to obtain a band-reinforced braun tube having an excellent explosion-proof effect by increasing the tightening force of a shrink-fitted metal band. To aim.

[0006]

[Means for Solving the Problems]

 The band-reinforced type cathode-ray tube according to the present invention has a bulge projecting outwardly on a flat portion of a portion of the metal band that is shrink-fitted to the cathode-ray tube in contact with the panel skirt portion, along the entire peripheral wall or at the corner. It is formed in one row or a plurality of rows along the part excluding the parts.

[0007]

[Action]

 In this invention, since the bulge portion is provided on the flat surface portion of the metal band which is in contact with the panel skirt portion, the rigidity of the metal band is improved and therefore the tightening force when the metal band is shrink-fitted to the cathode ray tube is increased. .

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 is a perspective view, and FIG. 2 is a cross-sectional view of FIG. 1. The same or corresponding parts as those of the conventional device are designated by the same reference numerals and the description thereof will be omitted. In the figure, reference numeral 4 denotes a bulge portion formed so as to project outward along a flat surface portion except a corner portion where the metal band 2 is in contact with the panel skirt portion 1a, and is formed at the same time when the metal band 2 is formed.

With this configuration, the rigidity of the portion of the metal band 2 in contact with the panel skirt portion 1a is significantly improved by the action of the bulge portion 4, and the panel skirt portion 1a is returned to the normal temperature after shrink fitting. It is strongly tightened to. That is, even if the metal band 2 is increased in size, stable rigidity is always obtained, and the tightening force after the metal band 2 is shrink-fitted to the cathode ray tube 1 is increased.

Although the bulging portion 4 is formed in a U-shape in the above embodiment, it may be V-shaped as shown in FIG. 3, or as shown in FIG. 4 may be provided two times, or even if two or more are provided, the same effect as that of the above-described embodiment can be obtained. Further, although the bulge portion 4 is provided at the portion excluding the corner portion in the above embodiment, it may be provided along the entire peripheral wall including the corner portion.

[0011]

[Effect of the device]

 As described above, according to this invention, the rigidity of the metal band shrink-fitted to the cathode ray tube is significantly improved, and an excellent explosion-proof effect that can sufficiently cope with the enlargement of the cathode ray tube is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a configuration diagram showing a conventional band-reinforced cathode ray tube.

[Explanation of symbols]

 1 CRT 1a Panel skirt part 2 Metal band 3 Mounting bracket 4 Bulging part

Claims (1)

[Claims for utility model registration] [Claim 1] A band formed by shrink-fitting an annular metal band having a joint by sticking an adhesive tape on the outer peripheral edge of the panel skirt of a CRT. In the reinforced cathode ray tube, a bulge portion protruding outward is provided in a flat portion of a portion of the metal band in contact with the panel skirt portion along the entire peripheral wall of the metal band or along the portion excluding the corner portion. Alternatively, a band-reinforced cathode ray tube characterized by being formed in a plurality of rows.