JPH0590796U - Band reinforced cathode ray tube - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a band-reinforced cathode ray tube, which has an improved explosion-proof effect by improving the mounting strength and reliability of the joints at both ends of an annular metal band, and which can sufficiently cope with the increase in size. [Structure] In the joint portion of both ends of the annular metal band 2, spot welding or the like 6 is additionally formed at both end portions 2a of the band that further come into contact with a portion such as spot welding with the second joint member 4.

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 side view showing a conventional band-reinforced CRT. In the figure, 1 is a cathode ray tube, 1a is a panel skirt portion of the cathode ray tube 1, 1b is a panel face portion, 2 is an annular metal band attached to the outside of the panel skirt portion 1a by shrink fitting, and 3 is the cathode ray tube 1 fixed. Attachment fittings 4 for the second joint member fixed to the joints at both ends of the annular metal band 2 by spot welding or the like, and 5 for spot welding for fixing the second joint member 4 to the joints at both ends. It is a group.

The cathode ray tube 1 is formed by first heating a thin annular metal band 2 having a uniform circumference and having a peripheral length shorter than that of the panel skirt portion 1a to extend the panel skirt portion of the brown tube 1. It is manufactured so that when it is fitted into 1a and the annular metal band 2 is returned to room temperature, a tightening force is applied to the panel skirt portion 1a. Further, both ends of the annular metal band 2 are joined together by a second joining member 4 which is fixed to the panel skirt 1a by a spot welding group 5 or the like from the opposite side, that is, the outside direction.

[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 with the enlargement of the shape of the cathode ray tube 1, and the cathode ray tube 1 generated when the implosion phenomenon occurs. The collapsing power of is also increased. That is, it is necessary to counterbalance the tightening force of the annular metal band 2 and the collapsing force of the cathode ray tube 1. However, since this tightening force acts on the spot welding group 5 with both ends of the annular metal band 2, especially with the second joining member 4, this spot welding group 5 has a problem as the tightening force is increased. However, there is a problem in that the spot welding group 5 comes off and the explosion-proof effect is impaired.

The present invention has been made in order to solve the above problems, and improves the attachment strength and reliability of the welded portion of the seam-sealed end portions of the annular metal band to improve the explosion-proof effect. The purpose is to obtain an excellent band-reinforced cathode ray tube.

[0006]

[Means for Solving the Problems]

 The band-reinforced cathode ray tube according to the present invention is formed by spot welding or the like at both ends of an annular metal band that is shrink-fitted to the cathode ray tube and abutting at both ends of the joint.

[0007]

[Action]

 In this invention, apart from the spot welding group part of the second joint member of the both-end joint portion of the annular metal band, spot welding or the like is added to both end portions of the band that abut at the both-end joint portion. After it is attached to the panel skirt portion, the tightening force of the annular metal band is added, and the attachment strength of the joint portions at both ends is improved.

[0008]

【Example】

 Example 1. An embodiment of this invention will be described below with reference to FIG. FIG. 1 is a perspective view showing a spliced portion at both ends of an annular metal band. The same or corresponding portions as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. In the figure, reference numeral 6 denotes a spot welding group in which a plurality of or a plurality of points are added to both end portions 2a of the band that abut at both ends of the annular metal band 2.

With such a configuration, after the annular metal band 2 is shrink-fitted to the cathode ray tube 1, the tightening force of the second joint member 4 spot-welded to the joints at both ends can be dispersed. Since this can be achieved, the attachment strength of the joints at both ends is improved. That is, even if the desired tightening force of the annular metal band 2 is increased as the shape of the brown pipe 1 is increased, it is possible to sufficiently cope with the increase.

Example 2. In the above-mentioned embodiment, the band both ends 2a of the both end joints are provided with a plurality of spot welding groups 6. However, as shown in FIG. However, the same effect as that of the above-described embodiment can be obtained.

[0011]

[Effect of the device]

 As described above, according to the present invention, the number of welded portions at both ends of the annular metal band shrink-fitted to the CRT is increased, so that the tightening force is improved and the size of the CRT is increased. It has the effect of obtaining an excellent explosion-proof effect that can be fully addressed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an end joint portion of an annular metal band according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a side view showing a conventional band-reinforced cathode ray tube.

[Explanation of symbols]

 1 Braun tube 1a Panel skirt part 1b Panel face part 2 Annular metal band 2a Band both ends 3 Mounting bracket 4 Second joint member 5 Spot welding group 6 Added spot welding group

Claims (1)

[Scope of utility model registration request] 1. At both end joints fixed by spot welding or the like by interposing a second joint member of an annular metal band that is shrink-fitted to a cathode ray tube, both ends of the abutting bands are formed into a spot welding group or the like. Band-reinforced cathode ray tube characterized by being firmly fixed.