JPS6042553Y2 - Electron beam adjustment device - Google Patents

Description

[Detailed description of the invention] This invention is a combination of multiple pairs that is installed on the neck of a cathode ray tube of a color television receiver, and performs purity adjustment and static convergence adjustment of three red, blue, and green electron beams. The present invention relates to an electron beam adjustment device equipped with a multipolar ring-shaped magnet.

Recently, in color television receivers, in order to reduce costs, make the shape smaller, and simplify adjustment, it is necessary to improve the precision of the deflection yoke mounted on the neck of the cathode ray tube and the cathode ray tube. This eliminates the need for dynamic convergence adjustment, eliminates the convergence yoke attached to the deflection yoke, and replaces the convergence yoke with multiple sets that perform purity adjustment and static convergence adjustment for each red, blue, and green electron beam. A configuration has been developed in which an electron beam adjusting device including a pair of multipolar ring-shaped magnets is attached to a deflection yoke and mounted on the neck of a cathode ray tube.

In this case, the electron beam adjusting device is required to have a simple structure, be easy to assemble, do not take much time to adjust, be small in size, and be low in cost.

Conventional electron beam adjustment devices use a cylindrical holder made of insulating material with a tightening part formed at one end, and a plurality of locking claws spaced apart in the axial direction on the outer periphery of the holder. A pair of multi-polar ring-shaped purity magnets for purity adjustment, which are magnetized in the circumferential direction with 2, 4, and 6 poles, are made of magnetic materials such as plastic magnets, and are also made of magnetic materials. Two pairs of multi-pole ring-shaped static magnets for static convergence adjustment, which are magnetized with multiple poles in the circumferential direction, are placed between the purity magnet and the static magnet, and between each coarse part of the static magnet. In order to prevent rotation, a thin ring-shaped spacer made of insulating material such as paper or plastic is inserted and fitted one after another. It was installed and fixed onto the neck of the cathode ray tube so that the attachment part was located on the neck side.

However, in an electron beam adjustment device having such a configuration, a spacer is inserted into the outer circumference of the holder together with the magnet in order to prevent the coarse sections of the ring-shaped magnet from rotating together, which increases the number of parts and costs. However, this method has various drawbacks, such as a decrease in work efficiency, making it unsuitable for mass production, and the possibility that the spacer may be damaged by the locking claws when inserting the spacer into the outer periphery of the holder.

The present invention relates to an electron beam adjustment device aimed at eliminating the above-mentioned drawbacks, and in particular, a magnet is installed on the outer periphery of a cylindrical holder into which multiple pairs of multipolar ring magnets are fitted, in place of conventional spacers. The present invention relates to an electron beam adjustment device characterized in that a flange piece and a separation wall are provided to prevent co-rotation between each pair.

An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 3, reference numeral 1 denotes a cylindrical holder made of an insulating material such as polypropylene, and the holder 1 is provided with a plurality of grooves 2 in the axial direction to provide elasticity.

The holder 1 includes a tightening portion 3 at one end, and the tightening portion 3 is provided with several protrusions 31 for regulating the position of the tightening band.

There is a cut groove 2 on the outer periphery of the end of the holder 1 in the direction opposite to the tightening part 3.
Accordingly, four elastic first locking claws 4 are integrally provided on the holder 1 at approximately equal intervals in the circumferential direction in the direction of the center of the tube axis of the holder 1. Similarly, four second locking claws 5 having elasticity are integrally provided on the holder 1 on the outer periphery (positions that do not affect attachment of the attachment band).

In the outer circumferential direction between the first locking pawl 4 and the second locking pawl 5 of the holder 1, two protrusions 61 and 62 are provided integrally with the holder 1 at a predetermined interval.

Of the jetties 61 and 62, the jetty 61 located on the first locking pawl 4 side is formed into a brim shape that continues in the circumferential direction in order to increase the strength of the holder 1, and the jetty 61 located on the second locking pawl 5 side is formed into a brim shape that continues in the circumferential direction. Jetty 6 located
2 is formed in a fragment shape to match the position of the second locking pawl 5 in the axial direction.

Between the first locking pawl 4 and the second locking pawl 5 on the outer periphery of the holder 1, a low magnetic permeability magnetic material such as a plastic magnet formed by mixing plastic and barium ferrite is used. Multi-pole ring-shaped magnets 71, 72, 73, which are magnetized into three pairs, are separated by protrusions 61, 62, and are sequentially arranged and fitted from the first locking pawl 4 side. It will be installed.

The magnets 71, 72, and 73 each have rotation adjustment knobs 71A, 72A, and 73A on their outer peripheries, and the magnets are fitted between the first locking pawl 4 provided on the holder 1 and the brim-shaped projection 61. The combined magnet 71 is a purity magnet that is magnetized into two poles in the circumferential direction, and the jetty 61, 62
The magnet 72 fitted therebetween is a static magnet magnetized with four poles in the circumferential direction, and the magnet 73 fitted between the jetty 62 and the second locking claw 5 is a static magnet magnetized with six poles in the circumferential direction. The magnets 71 and 72 and 73 are fitted and attached to predetermined positions on the outer periphery of the holder 1 from the side of the first locking claw 4 and from the side of the tightening part 3, respectively.

Reference numeral 8 denotes a tightening band that is attached to the tightening part 3 of the holder 1, and several holes 81 for position regulation that fit with the protrusions 31 of the tightening part 3 are provided in the circumferential direction in correspondence with the protrusions 31. It will be done.

Here, on both sides of the brim-shaped jetty 61 provided on the holder 1 and on the surface facing the magnet 73 of the second locking claw 5,
A plurality of protrusions 9 are provided in point contact with the side surface of the magnet, and these protrusions 9 press the magnet 71 in the direction of the first locking claw 4 and the magnets 72 and 73 in the direction of the jetty 62. ) 71, 72, and 73 are those that can obtain an appropriate rotational torque.

In the electron beam adjustment device having such a configuration, the holder 1 fitted with the magnets 71, 72, 73 is placed over the cathode ray tube 1 such that the magnet 71 is located on the cathode ray tube enlargement side.
Attach the tightening pad 8 to the specified position on the neck 10A of the
It is fixed by reducing the diameter of the tightening part 3 through the .

Thereafter, the purity adjustment is performed by rotating the magnet 71, and the static convergence adjustment is performed by rotating the magnets 72 and 73.

In one embodiment of the present invention, two jetties are provided between the first and second locking claws provided on the outer periphery of the holder, and the jetty on the first locking claw side is continuous in the circumferential direction. Although the description has been given of the one formed in the shape of a flange, the protrusion on the second locking pawl side may be formed in the shape of a flange.

Furthermore, in one embodiment of the present invention, a magnet for polarity adjustment, which is magnetized into two poles in the circumferential direction, is placed between the first locking pawl on the outer periphery of the holder and the jetty, and between the jetties and the second engaging pawl. Although we have described the case where a static convergence adjustment magnet magnetized with 4 or 6 poles is fitted between the pawls, the fitting position of the magnet, the fitting order, the number of magnetized poles, etc. are described in the examples. For example, the magnet for purity adjustment may be magnetized with four poles and may be fitted between the second locking pawl provided on the outer periphery of the holder and the protrusion.

Furthermore, the shape of the holder is such that the first
It is sufficient that a second locking pawl is formed and at least two jetties are provided between the locking pawls, and the number and position of the locking pawls, the number of jetties, etc. are limited to the examples. It's not a thing.

As described above, according to the electron beam adjusting device of the present invention, the clamping portion is provided at one end, the first locking claw is provided on the outer periphery of the other end, and the second locking claw is provided on the outer periphery near the tightening portion. The holder is integrally provided with a bulge consisting of at least two strips in the outer circumferential direction between the locking claws of the integrally provided cylindrical holder, one of which is continuous in the circumferential direction and has a flange shape to adjust the purity.・At least three sets of multipolar ring-shaped magnets for static convergence adjustment are separated into each set by a jetty on the outer periphery of the holder and fitted onto the outer periphery of the holder, and each set of magnets rotates together. This is prevented by the jetty, and there is no need for a separate spacer, which eliminates the number of parts and reduces costs.Also, since only the magnet needs to be fitted to the outer periphery of the holder, work efficiency is improved and mass production is possible. Furthermore, there is no risk of damage to the spacer that occurs when conventional spacers are attached, and one of the at least two jetties provided on the outer periphery of the holder is formed in the shape of a continuous brim in the circumferential direction. This has various effects, such as increasing the strength of the holder and preventing deformation, damage, etc.

[Brief explanation of the drawing]

FIG. 1 is a partially transparent side view of an electron beam adjustment device according to an embodiment of the present invention, FIG. 2 is a rear view, and FIG. 3 is an exploded perspective view. DESCRIPTION OF SYMBOLS 1... Cylindrical holder, 3... Tightening part, 4... First locking claw, 5... Second locking claw, 61,62... Jetty, 71,72,7
3...Multi-pole ring magnet.

Claims (1)

[Scope of utility model registration request] A cylinder mounted on the neck of a cathode ray tube, integrally provided with a tightening portion at one end, a first locking claw on the outer periphery of the other end, and a second locking claw on the outer periphery near the tightening portion. a shaped holder;
In the electron beam adjustment device comprising at least three pairs of multipolar ring-shaped magnets fitted in parallel between the first locking pawl and the second locking pawl, the first locking pawl of the holder The holder is integrally provided with at least two brim-shaped protrusions, one of which is continuous in the circumferential direction, in the outer circumferential direction of the locking pawl and the second locking pawl; An electron beam adjustment device characterized in that each set is separated and fitted onto the outer periphery of the holder.