JPH0125411Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a deflection yoke.

Furthermore, this invention applies to display cathode ray tubes (hereinafter referred to as "CRTs") used with computers.
It relates to a deflection yoke that is attached to a vehicle.

In this type of CRT for display, the deflection coil generally has a barrel magnetic field to improve focus, so the screen is distorted into a pink tension type.

In order to correct such distortion, as shown in FIG. 1, magnets 4 formed in a rotationally adjustable manner are provided at the four corners of the enlarged front portion 3 of the coil separator 2 of the deflection yoke 1. By adjusting the rotation of this magnet 4, the four corners of the pink union distortion raster 5 can be pushed toward the center as shown in Figure 2, but in reality, the distortion at these four corners is forcibly corrected. Then, each side becomes wavy as shown in 6.

The present invention solves such raster "waviness" by simple means.

The embodiments shown in the drawings will be described below.

In the present invention, as shown in FIG. 3, plate-shaped magnets 7a, 7b, 7c, 7d is provided, and the waveform raster is corrected to a desired rectangular raster 8 as shown in FIG. 5 by means of this plate magnet. In this case, since the top and bottom sides of the raster are longer than the left and right sides, magnet 7 is applied to correct the top and bottom sides.
The magnets a and 7b are longer than the left and right magnets 7c and 7d. The polarities of the magnetic poles of the upper and lower magnets 7a and 7b are opposite to each other, and the polarities of the left and right magnets 7c and 7d are also opposite to each other. Incidentally, FIG. 5 shows the relationship between each magnet and the raster when viewed from the rear (this point also applies to FIG. 2). The upper and lower magnets 7a and 7b are attached to the L-shaped first rib 9 [protruding rearward] provided on the outer surface of the coil separator 2, and a pair of upper and lower magnets, as shown in FIG. The adhesive 13 is positioned and held by the extended hook-shaped second rib 10 and the third rib 11, and is applied to the notch 12 provided close to the first rib 9 and its surroundings. is fixed to the coil separator 2 by. This adhesive 13 is applied to the pair of coil separator halves 2a, 2.
b fixation, a pair of toroidal core halves 14a, 1
Fixing the vertical deflection coil 15 (attached to the skirt portion 16 of the coil separator) wound around the coil separator 4b to the coil separator 2, and fixing the saddle-shaped horizontal deflection coil provided inside the coil separator 2 to the coil separator 2. It also serves to ensure that Note that the horizontal deflection coil (not shown) inside the coil separator 2 is fixed to the coil separator 2 by the adhesive 13 at the semicircular forward rebound portion (the portion that generates an inactive magnetic field) of the horizontal deflection coil.

The plate magnets 7c and 7d provided on the left and right sides are also attached in substantially the same manner and fixed with adhesive 13, but there are no notches in these parts. In addition, when attaching the left and right magnets, a pair of ribs 28 with a large opposing distance are provided parallel to a pair of ribs 27 with a small opposing distance shown in FIG.
This is to take into consideration the case where it is necessary to attach long magnets 7c and 7d.

17 to 21 are connection terminals provided on the terminal board 22. Reference numeral 23 denotes a tongue piece at the rearmost portion of the deflection yoke 1, which serves to fix the deflection yoke to the neck portion of the CRT by means of a tightening band 24 and screws 25. 26 is the coil separator half body 2a, 2
This is means for fitting and fixing the front enlarged portion of b.

As explained above, according to the present invention, the "undulations" on each side of the raster that occur when the four corners of the pink union distortion raster are pushed in by the rotationally adjustable magnets provided at the four corners of the deflection yoke can be applied to the upper, lower, left, and right sides. This can be corrected using a plate-shaped magnet installed in the In addition, these plate-shaped magnets are positioned and held by the ribs provided on the coil separator, and are simultaneously fixed to the coil separator by the adhesive for coil fixation, making it easy to work and firmly fixed. become. In particular, the adhesive for fixing the upper and lower magnets has a rational mounting structure in which the adhesive for fixing the upper and lower magnets also extends to the horizontal deflection coil on the inner surface through the notch, and also fixes the horizontal deflection coil.

[Brief explanation of drawings]

FIG. 1 is a rear view of a conventional deflection yoke, and FIG. 2 is an explanatory diagram of the conventional example. FIG. 3 is a rear view of a deflection yoke embodying the present invention, and FIG. 4 is an enlarged perspective view for explaining the main parts thereof.
FIG. 5 is a drawing for explaining the effects of the present invention. 1... Deflection yoke, 2... Coil separator,
4... Rotation adjustable magnet, 7a to 7d... Plate magnet, 9, 10, 11... Rib, 12...
...notch, 13...adhesive.

Claims (1)

[Scope of utility model registration request] In a device in which rotation adjustment type magnets are provided at the four corners of the front part of the deflection yoke to press down the four corners of the pink union raster, plate-like magnets are provided at each of the upper, lower, left, and right parts of the deflection yoke to correct the waviness of each side of the raster. The upper and lower plate-shaped magnets are positioned and held by a plurality of ribs formed integrally with the coil separator, and a coil fixing magnet is provided in a notch formed in the coil separator. A deflection yoke characterized in that it is also fixed with an adhesive.