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Centering magnet of deflection yoke and its producing method

A magnet, centering adjustment technology, applied in the field of deflection yoke, can solve the problems of deterioration of focusing performance, reduction of image resolution, etc., to achieve the effect of eliminating the adjustment magnetic force

Inactive Publication Date: 2005-08-10
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the focusing performance of the image displayed by the electron beam on the kinescope deteriorates, reducing the resolution of the image

Method used

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  • Centering magnet of deflection yoke and its producing method
  • Centering magnet of deflection yoke and its producing method
  • Centering magnet of deflection yoke and its producing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] As shown in Figure 1, the centering magnet 1 of this embodiment is made of nylon amide fiber resin (hereinafter referred to as magnetic resin) containing Alnico alloy magnetic material powder, and is formed into an annular shape with a central hole 18. , and magnetize the parts deviated by 180 degrees around the central axis of the ring into N poles 12 and S poles 13 . In this centering magnet 1, a pair of rotation adjustment wings 10, 11 protrude outward from two positions where the N pole 12 and the S pole 13 are formed, and a pair of Resin access traces 19, 19.

[0044] In addition, in the centering magnet 1, its ring shape becomes line-symmetric with respect to the extension line (A-A line) of the diameter line connecting the center point 16 of the N pole 12 and the center point 17 of the S pole 13, and at the same time, it is perpendicular to the A-A line. The extension of the diameter line (B-B line) becomes line symmetric.

[0045] For the manufacture of the ce...

Embodiment 2

[0056] The centering magnet 4 of the present embodiment shown in Fig. 7 is the same as embodiment 1, adopts the nylon amide fiber resin that contains Alnico alloy magnetic material powder to form a ring shape, deviates 180 degrees around the central axis of the ring A pair of rotation adjustment wings 10, 11 are protruded from the position. On the other hand, one rotation adjustment wing 10 is magnetized into N pole 12, and the other rotation adjustment wing 11 is magnetized into S pole 13, except for a pair of resin inlet and outlet traces 19 , 19 are formed at a position deviated from the phase of 90 degrees from the pair of rotation adjustment wing portions 10 , 11 , and have the same external shape as that of the first embodiment.

[0057] In the manufacture of the centering magnet 4, at first as shown in Figure 8, there is a metal mold 25 with an annular cavity 26 corresponding to the shape of the centering magnet, and in the cavity 26 of the metal mold 25, it is used to f...

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PUM

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Abstract

The invention provides a deflection yoke having two centering magnets mounted thereon for the adjustment of centering. Each of the centering magnets is molded in an annular form from a resin material containing a finely divided magnetic material, the centering magnet having two portions opposed to each other as displaced from each other by 180 degrees about a center axis of the annular form thereof and magnetized to an N pole and an S pole respectively, the content of the magnetic material varying circumferentially of the annular form, the distribution of the content being symmetrical about a straight line orthogonal to a straight line through a center point of the N pole and a center point of the S pole. The magnetic force for the adjustment of centering can be eliminated by the two magnets mounted in combination.

Description

technical field [0001] The present invention relates to a deflection yoke for deflecting an electron beam emitted from a cathode ray tube. Background technique [0002] As shown in Fig. 10(a) and Fig. 10(b), two annular centering magnets 7, 7 are installed at the end of the neck side of the deflection yoke 6, and by rotating the two centering magnets 7, 7, the Adjust the centering of the electron beam. [0003] The centering magnet 7 is made of a resin (hereinafter referred to as magnetic resin) mixed with magnetic material powder, formed Figure 11 In the illustrated annular shape, two positions shifted by 180 degrees around the central axis of the annular shape are magnetized into N pole 73 and S pole 74, thereby forming a bipolar magnet. In addition, in the centering magnet 7 , a pair of rotation adjustment wing portions 70 and 71 protrude from two locations where the N pole 73 and the S pole 74 are formed. In addition, the ring shape of the centering magnet 7 becomes l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/76H01F7/02H01J29/54H01J29/70
CPCH01F7/0278B82Y15/00H01J29/701
Inventor 吉山伸二
Owner SANYO ELECTRIC CO LTD