JPH026589Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deflection yoke device having a configuration suitable for correcting deflection distortion mounted on a cathode ray tube of a television receiver or the like.

In conventional deflection yoke devices, a pair of magnets are arranged and fixed diagonally on the front side of the deflection yoke in order to correct deflection distortion that occurs on the screen. As shown in FIG. 1, a rod-shaped magnet 1, such as a ferrite magnet, which is magnetized in the longitudinal direction, is used. However, in a deflection yoke device having such a configuration, a rod-shaped magnet magnetized in the longitudinal direction is used as a magnet for correcting deflection distortion, which may cause variations in the size or amount of magnetization of the magnet. However, the shape is limited to uniform and simple shapes, and since both longitudinal ends are magnetized, the middle part cannot be omitted, and the necessary length is always required, making it difficult to use materials. It had various disadvantages, such as increased

The present invention relates to a deflection yoke device aimed at eliminating the above-mentioned drawbacks, and more particularly to a deflection yoke device in which a magnet for correcting deflection distortion is composed of at least a pair of surface-magnetized magnets. be.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings. In FIG. 2, 11 is a deflection yoke, which includes a core 12, a vertical deflection coil 13 wound directly on the outer circumference of the core 12 in a toroidal manner, and a vertical deflection coil 13 wound on the inner surface of the core 12 through a bobbin 14 in a saddle shape. a horizontal deflection coil (not shown) formed on the rear end of the bobbin 14.
By reducing the diameter of the tube 5 using a fastener 16, the tube is fixed at an optimum position on a cathode ray tube (not shown). In the deflection yoke 11, a magnet is provided on the back side of the front enlarged portion 14A formed on the front side of the bobbin 14 (corresponding to the front side of the deflection yoke 11) for correcting deflection distortion occurring on the screen. As such, a pair of surface-magnetized magnets 17A and 17B are fixed with different magnetic poles on the same plane with a predetermined distance apart by means such as adhesion or locking. The magnets 17A and 17B are made of plastic or rubber, for example, alnico magnets, and are independently surface magnetized as shown in FIG.
A magnetic field (magnetic force) in the direction of the arrow is generated by arranging different magnetic poles (N and S poles) on the same plane with a predetermined distance between them. This is done by moving the beam to correct deflection distortion on the screen.

In one embodiment of the deflection yoke device of the present invention, only one pair of surface-magnetized magnets are used as magnets for correcting deflection distortion. ), but the number of plane-magnetized magnets may be increased as appropriate depending on the amount (magnitude) of deflection distortion, position, etc.; As long as the deflection distortion is corrected on the front side, it is not limited to the back side of the front enlarged part of the bobbin. For example, when applied to a deflection yoke with a configuration that does not use a bobbin, it can be directly placed and fixed on the surface of the deflection coil. It is okay to do so. Further, the winding shape of the deflection coil constituting the deflection yoke is not limited to the embodiment. Furthermore, if the shape of the surface-magnetized magnet is configured so that the opposing portions are tapered, as shown in FIG. It is possible to obtain various magnetic fields depending on the shape.

As described above, according to the deflection yoke device of the present invention, at least one pair of surface-magnetized magnets are placed at the front of the deflection yoke with different magnetic poles on the same plane with a gap between them as magnets for correcting deflection distortion. For example, by using an alnico-based magnet for image magnetization, the residual magnetic flux density is higher than that of conventional rod-shaped magnets (ferrite magnets), and as a result, 1/2 the thickness to obtain the same characteristics
In addition, by eliminating the intermediate part, the amount of material used can be reduced by about 1/3 to 1/4, making the equipment more compact and reducing costs. , stable magnetic field (magnetic force) by using surface magnetized magnets
is obtained, the deflection distortion can be reliably corrected, and the shape of the material can be arbitrarily set and processed, making it easy to obtain a magnet with a shape that generates the desired magnetic field distribution. , etc., and is extremely effective in the field of deflection yoke devices, where miniaturization and cost reduction of devices are desired.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a deflection distortion correction magnet used in a conventional deflection yoke device, Fig. 2 is a perspective view of the structure of a deflection yoke device according to an embodiment of the present invention, and Fig. 3 is also a deflection distortion correction magnet. and FIGS. 4A and 4B are perspective views of a deflection distortion correction magnet in another embodiment of the present invention. 11... Deflection yoke, 17A, 17B... Surface magnetized magnet.

Claims (1)

[Scope of utility model registration request] A deflection yoke device characterized in that, as a magnet for correcting deflection distortion, at least a pair of surface-magnetized magnets are arranged and fixed on the front side of a deflection yoke with different magnetic poles on the same plane and spaced apart from each other.