JPH0338935Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a raster distortion correction device for a display device using a cathode ray tube, such as a television receiver.

(b) Prior Art A conventional raster distortion correction device is disclosed in Japanese Utility Model Application Publication No. 138254/1983. This known technique is shown in Figure 1.
This will be explained based on FIG. First, in the conventional structure shown in FIG. 1, reference numeral 5 denotes a magnet holding part 7 that rotatably holds a magnet 6, a pair of connecting parts 8, 8, and a front enlarged part 3 of the coil separator 2 of the deflection yoke 1. A sliding part 9 shaped along the circumferential surface 4 of
The holder 5 is provided at each of the four corners of the enlarged portion 3, and serves to correct raster pincushion distortion.

The attachment and sliding of this holder 5 to the deflection yoke 1 is carried out on the circumferential surface 4 of the front enlarged portion 3 of the coil separator 2.
This is done by inserting the screws 11, 11 into the holes 10, 10 formed in the sliding part through the elongated holes 12, 12 of the sliding part. That is, the sliding movement of the holder 5 is caused by the screws 11, 11.
Loosen the screws, then tighten the screws at the optimum position to secure them. The holding portion 7 of the magnet 6 is held firmly by a spring member 13, and is prevented from coming off upward by stopper pieces 14, 14. Magnet 6 is hole 1 formed in the center
The rotation can be adjusted by inserting a jig into 5 and rotating it. 16, 16 is the toroidal core half body 17,
A vertical deflection coil is wound around 17, and 18 is a centering magnet. In the conventional example shown in FIG. 1, since the screws 11 and 11 are required, screw tightening work is required in the assembly process, which results in poor workability and the holder 5 when the holder slides.
It has the disadvantage of being unstable because it is supported by screws. Moreover, the rotation of the magnet 6 is driven from the axial direction of the deflection yoke 1, and the holder 5 must be fixed using a screwdriver from a position perpendicular to the axial direction of the deflection yoke 1, which requires a large amount of space around the cathode ray tube of the display device. It was hot too.

For this reason, the conventional example shown in Fig. 2 is
In the conventional example shown in FIG. 2, the coil of the deflection yoke 1 is connected to the magnet holding part 7 and connected to the magnet holding part via a pair of opposing connecting parts 8, 8. In order to slidably attach the metal magnet holder 5 consisting of a pair of sliding parts 9 having a shape along the circumferential surface 4 of the front enlarged part 3 of the separator 2 to the enlarged part 3 of the coil separator 2, The sliding portion 9 of the magnetic holder 5 is attached to the circumferential surface 4 of the enlarged front portion of the coil separator 2.
A plurality of ribs 19, 20, 21, 22 that hold the
By providing a long hole 23 in the circumferential direction in a portion of the coil separator that intersects at right angles with the circumferential surface 4, and attaching the pair of sliding parts 9, 9 to the circumferential surface of the enlarged part via the plurality of ribs. Magnetic holder 5
The magnet holder 5 is made slidable and is provided with a wedge 24 having an engaging portion for the holder and a portion crimped to the coil separator 2 in the elongated hole 23 of the coil separator 2.
However, as shown in FIG. 2, a separate wedge 24 is required, resulting in poor workability and difficulty in managing parts during manufacturing.

(c) Purpose of the invention The object of the present invention is to provide a raster distortion correction device devised to eliminate the above-mentioned drawbacks.

(d) Structure of the invention In the present invention, a holder holding a magnet is pressed by a presser piece so that it can slide onto the enlarged front part of the coil separator of the deflection yoke, and a recess is provided in the holder, and the enlarged front part This structure is characterized in that a plurality of protrusions are formed on the holder and the sliding direction can be adjusted by selecting the protrusion that corresponds to the pre-existing concavity.

(E) Embodiment In FIG. 3, the holder 5 holding the magnet 6 is the coil separator 2 of the deflection yoke 1.
This is a presser piece that presses so as to be able to slide on the front enlarged part 3 of the holder. Reference numeral 26 denotes a plurality of protrusions formed on the front enlarged portion 3. By selectively fitting the recesses 27 (see FIG. 4) provided in the holder 5 into the protrusions 26, the holder 5 The sliding direction can be adjusted in stages. At that time, if fine adjustment is required, the spacing between the protrusions 26 may be made smaller.

In order to prevent the holder 5 from coming off in the radial direction, a rib 2 is provided on the holding piece 25 as shown in FIG.
It is good to provide 8.

(f) Effects of the invention According to the invention, the movement of the magnet holder 5 can be adjusted on the front enlarged portion 3 of the coil separator 2, which has the effect of providing greater stability compared to conventional methods using screws. . The fixation of the holder 5 after the sliding adjustment is preferably carried out by fitting the notch 27 formed on the holder into the protrusion 26 provided on the enlarged front portion 3 of the coil separator, in conjunction with the action of the presser piece. This has the effect of not requiring a conventional fixing device such as a wedge, which is advantageous in terms of workability and parts management.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional raster distortion correction device, and FIG. 2 is a perspective view of another conventional example. FIG. 3 is a perspective view of a raster distortion correction device embodying the present invention, and FIGS. 4 and 5 are enlarged views of the main parts thereof. 1... Deflection yoke, 2... Coil separator,
3... Front enlarged portion, 5... Holder, 6... Magnet, 25... Holding piece, 26... Protrusion, 27...
Concave and missing.

Claims (1)

[Claims for Utility Model Registration] A coil separator that holds horizontal and vertical deflection coils, a magnet holding part that is attached to the front enlarged part of the coil separator and rotatably holds a magnet, and a circumferential direction of the front enlarged part. A raster distortion correction device comprising: a magnetic holder having a pair of sliding parts extending in the magnetic field and sliding in the circumferential direction; and a pair of connecting parts connecting the magnetic holding part and the pair of sliding parts. A recess formed in the pair of sliding parts, a plurality of protrusions formed in the front enlarged part and capable of selectively engaging with the recess, and a plurality of protrusions formed in the pair of sliding parts to connect the pair of sliding parts to the front enlarged part. A raster distortion correction device comprising a presser piece that presses sideways.