KR20030009998A - Deflection yoke - Google Patents

Abstract

PURPOSE: A deflection yoke is provided to achieve improved workability by allowing magnet to be easily and conveniently assembled to the screen part of the coil separator, and eliminating the need of performing an additional procedure for preventing movement of the magnet after assembly. CONSTITUTION: A deflection yoke(4) comprises a screen part, a rear plate, and a magnet(40) mounted on the outer surface of the screen part so as to correct mis-convergence on the screen. A coil separator includes a fixing member(30) for fitting the magnet to the outer surface of the screen part, and the fixing member includes a fixing hook(31) and a tension hook(32) for elastically supporting and fixing the magnet with respect to the direction of fitting the magnet to the outer surface of the screen part. The fixing hook has a stopper protrusion with an end which gets caught at an outer end of the magnet. The tension hook has a stopper protrusion with an end which is connected to the inner surface of the fixing member, and the other end extended toward the front end of the magnet inserted into the fixing member and gets caught at the front end of the magnet.

Description

Deflection yoke

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke employed in a cathode ray tube, and more particularly, to easily assemble a correction magnet provided in a screen portion of a coil separator to correct an on-screen distortion of the cathode ray tube. It is about a deflection yoke that can be improved.

Generally, the deflection yoke used in the cathode ray tube (CRT) of a TV receiver or monitor is provided with a deflection yoke to precisely deflect the three-color beams scanned from the electron gun to the fluorescent film coated on the screen surface of the cathode ray tube. The yoke is one of the most important elements of the cathode ray tube magnetic device. It acts to deflect the electron beam emitted from the electron gun so that an electric signal transmitted in time series can be reproduced as an image on the cathode ray tube screen.

That is, since the electron beam emitted from the electron gun goes straight onto the screen by the high voltage, only the central phosphor of the screen emits light, so the deflection yoke is deflected to reach the screen in the order of scanning from the outside. The yoke forms a magnetic field so that the electron beam is precisely deflected to the fluorescent film coated on the screen of the cathode ray tube by using a force that is changed when the electron beam passes through the magnetic field and the traveling direction thereof is changed.

FIG. 1 is a side view showing a typical cathode ray tube, and as shown, the deflection yoke 4 is positioned in the RGB electron gun portion 3 of the cathode ray tube 1 and scans an electron beam scanned from the electron gun 3a. The film is deflected by the fluorescent film applied to the film.

The deflection yoke 4 has a coil separator 10 which is largely symmetrical and combined into one.

The coil separator 10 is provided to insulate the horizontal deflection coil 15 and the vertical deflection coil 16 and to assemble their positions to some degree. The screen is coupled to the screen side of the cathode ray tube 1. The neck portion 12 is integrally formed from the portion 11a, the rear plate 11b and the center surface of the rear plate 11b, and is coupled to the electron gun portion 3 of the cathode ray tube 1.

The inner and outer circumferential surfaces of the coil separator 10 are provided with a horizontal deflection coil 15 and a vertical deflection coil 16 for forming a horizontal deflection magnetic field and a vertical deflection magnetic field by power applied from the outside, respectively. A ferrite core 14 is provided to surround the deflection coil 16 to reinforce the vertical magnetic field.

That is, the coil separator 10 is provided with a horizontal deflection coil 15 for forming a horizontal deflection magnetic field on the upper and lower inner peripheral surface, and the vertical deflection coil 16 for forming a vertical deflection magnetic field on the upper and lower sides of the outer peripheral surface is wound. It is a structure.

Here, the horizontal deflection coil 15 and the vertical deflection coil 16 provided on the inner and outer surfaces of the coil separator 10 are drawn on the circuit board located on the outer surface of the coil separator 10 although not shown. It is configured to receive power by being connected to a terminal.

On the other hand, the outer circumferential surface of the neck portion 12 of the coil separator 10 focuses the electron beam scanned from the electron gun 3 of the cathode ray tube 1 precisely at the center of the screen 2, that is, to adjust the positive convergence. A convergence yoke 20 is provided.

The deflection yoke 4 has three horizontal beams of red (R), green (G), and blue (B) scanned from the electron gun 3a of the cathode ray tube 1, and the horizontal deflection coil 15 and the vertical deflection coil 16 The sawtooth pulses are applied to the screen, and are scanned on the screen while being deflected by the magnetic field generated according to Fleming's left-hand law so that the necessary image is formed on the screen of the cathode ray tube 1.

Meanwhile, as shown in FIG. 2, a plurality of correction magnets 200 are provided on the outer circumferential surface of the screen portion 11a of the coil separator 10 as a means for correcting the miss convergence on the screen. In this case, the magnet 200 It mainly acts to correct distortion in the up and down directions on the screen.

The magnet 200 is configured to insert and fix the fixture 100 integrally formed on the outer peripheral surface of the screen portion (11a).

That is, the fastener 100 forms a recess of a predetermined size having a size enough to accommodate the magnet 200 inside the screen portion 11a, and the magnet inserted into one end of the entry port of the groove. Hook 110 is provided with a locking step for engaging the outer end of the (200).

In this configuration, when the magnet 200 is inserted into the inlet side of the fixture 100 in order to fix the magnet 200 to the fixture 100, the locking jaw of the hook 110 is inserted into the fixture 100 of the magnet 200. The outer end of the elasticity is pressed down so that the magnet 200 is prevented from flowing in the front and rear directions to be inserted into the fixture 100 as a result.

However, in the structure of the fastener 100 as described above, the magnet 200 is supported and fixed by the locking jaw of the hook 110 provided at the inlet side of the fastener 100, and thus, due to external shock or other vibrations. There is a problem such that the reliability of the product is lowered easily flowed and released from the fixture 100.

Conventionally, in order to improve such a problem, the operation of applying a certain amount of adhesive to the fixing fixture 100, the magnet 200 is inserted, but this is also a problem that workability and productivity is reduced by the addition of the labor of applying the adhesive There is this.

The present invention was created in order to solve such a conventional problem, an object of the present invention can be firmly fixed by the elastic force on both end surfaces of the magnet inserted into the fixture without the need for a separate adhesive coating operation. The main purpose is to prevent flow.

1 is a side view of a cathode ray tube generally employing a deflection yoke;

2 is a partial perspective view showing a coil separator according to the prior art;

3 is a partial cross-sectional view showing a coil separator according to the prior art,

4 is a partial cross-sectional view showing a coil separator according to the present invention;

5 is a partial perspective view showing a coil separator according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: cathode ray tube 2: screen surface

3: Electron gun 3: Electron gun

4: deflection yoke 10: coil separator

11a: screen portion 11b: rear plate

12 neck portion 14 ferrite core

15,16: deflection coil 20: convergence yoke

30: fixture 31,32: hook

40: magnet

The deflection yoke according to the present invention for realizing such an object forms a screen portion and a rear plate coupled to the screen side of the cathode ray tube, and a deflection yoke is provided on the outer circumferential surface of the screen portion with a magnet for correcting miss convergence on the screen. In

The coil separator forms a fixture having a predetermined size into which the magnet is inserted into the outer circumferential surface of the screen portion, and the fixture is integrally fixed to the fixing hook and the tension hook which elastically support the front and rear surfaces of the magnet with respect to the magnet insertion direction. It is characterized by consisting of.

The fixing hook of the present invention is provided on the outer surface of the entrance opening of the fastener and has a locking jaw that one end is caught on the outer end of the magnet, the tension hook is one end is connected to the inner surface of the fixture facing the fixing hook The other end extends toward the tip side of the magnet inserted into the fixture to form a latching jaw that is elastically engaged on one end of the magnet.

Hereinafter, a preferred embodiment of the deflection yoke according to the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 are views showing a part of the coil separator according to the present invention, which will be described below with reference to FIG. 1 and denoted by the same reference numerals.

As shown therein, the deflection yoke according to the present invention comprises a coil separator 10 which is symmetrically separated in pairs and assembled integrally, wherein the coil separator 10 has a screen surface 2 of the cathode ray tube 1. Neck portion 12 which is integrally formed from the screen portion 11a coupled to the rear plate 11b and the center surface of the rear plate 11b and coupled to the electron gun portion 3 of the cathode ray tube 1. Is made of.

The coil separator 10 is provided with a horizontal deflection coil 15 and a vertical deflection coil 16 for forming a horizontal deflection magnetic field and a vertical deflection magnetic field by power applied from the outside to the inner and outer circumferential surfaces thereof. It insulates (15) and (16) and at the same time plays a role in positioning. And, the outer surface of the vertical deflection coil 16 is provided to surround the vertical deflection coil 16 is provided with a ferrite core 14 for strengthening the vertical magnetic field.

In addition, a convergence yoke 20 is provided on the neck portion 12 of the coil separator 10 as a means for correcting positive convergence on a screen.

On the other hand, on the outer circumferential surface of the screen portion 11a of the coil separator 10, a plurality of screen correction magnets 40 are provided for correcting miss convergence on the screen, that is, distortion in the up and down directions on the screen.

This configuration is very similar to the structure of the conventional deflection yoke. However, the present invention is characterized in that the magnet for screen correction is firmly supported and fixed on the screen of the coil separator without a separate adhesive coating operation to prevent flow.

As shown in FIGS. 4 and 5, the coil separator 10 provides a fastener 30 for inserting the magnet 40 into the outer circumferential surface of the screen portion 11a, which is inserted into the magnet 40. ) Is provided with a fixing hook 31 and a tension hook 32 for fixing. Here, the size of the fixture 30 is formed in a size corresponding to the magnet 40, the fixed hook 31 and the tension hook 32 is configured to support the front, rear in the entry direction of the magnet 40. do.

That is, the fixing hook 31 is provided in the form having a locking jaw on the triangular piece on one side of the entrance port of the fastener 30, the locking jaw is in contact with the outer end of the magnet 40 inserted into the fixing tool 30 It will generate a fixed force.

And the tension hook 32 is provided to retain a predetermined elastic force, one end is connected to the inner end of the fixture 30 opposite to the fixing hook 31, the other end is a fixture having a predetermined length It is provided in a form extending to the tip end side of the magnet 40 inserted into the (30). The extended end is formed with a locking jaw on the triangular piece facing the fixed hook 31, the locking jaw of the tension hook 32 is in elastic contact with the one end of the magnet 40 to provide a predetermined support force Will occur.

On the other hand, the locking jaw of the fixing hook 31 and the locking jaw of the tension hook 32 is spaced apart enough to prevent the flow before and after the insertion direction when the magnet 40 is inserted into the fixture 30 In general, the locking jaw of the fixed hook 31 and the locking jaw of the tension hook 32 are formed at intervals proportional to the length of the magnet 40.

Looking at the configuration in which the magnet 40 is seated in the fixture 30 of the coil separator 10 is configured as follows.

4 is a plan view showing a coil separator showing a structure in which a magnet is assembled to a fixture. In order to assemble the magnet 40 to the fixture 30 provided on the outer circumferential surface of the screen portion 11a, first, the magnet 40 is fastened to the fixture 30. Insert through the opening of one side, that is, open one side.

When the magnet 40 is pushed into the fixture 30 as described above, the magnet 40 elastically enters the fixture 30 while pressing the tension hook 32 toward the center of the coil separator 10.

Subsequently, the assembly force applied to the magnet 40 in the state where the magnet 40 is completely inserted into the fixture 30, that is, the end portion of the magnet 40 is inserted until it contacts the engaging jaw of the tension hook 32. When the release hook is released, the tension hook 32 returns to its position by its own elastic force, and at the same time, the rear end of the magnet 40 is caught by the locking jaw of the fixing hook 31 to complete the assembly.

The magnet 40 assembled as described above is firmly supported and fixed on both sides by the fixing hook 31 and the tension hook 32, thereby preventing the magnet 40 from being separated and flowing in the fixture 30, and in particular, a tension having its own elasticity. Hook 32 is to reduce the shock and other vibrations transmitted to the magnet 40, thereby reducing the flow of the magnet 40 continuously.

On the other hand, the above-described embodiment is merely described one preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed as appropriate within the scope of the same idea. For example, the shape and structure of each component shown in the embodiment of the present invention can be modified.

As described above, according to the deflection yoke according to the present invention, the magnet provided in the screen portion of the coil separator may be more easily assembled, and the post-assembly operation does not require a separate post operation to prevent the magnet from flowing. There is an advantage that the performance and productivity are greatly improved.

In addition, the present invention by the structure that the fixture is elastically supported for the magnet to be able to continuously and stably prevent the flow and departure of the magnet due to external impact or other vibrations to improve the reliability of the cathode ray tube employing this There is an advantage.

Claims (2)

In a deflection yoke having a screen portion coupled to a screen side of a cathode ray tube and a rear plate, and a magnet for correcting misconvergence on a screen provided on an outer circumferential surface of the screen portion, The coil separator forms a fixture having a predetermined size into which the magnet is inserted into the outer circumferential surface of the screen portion, and the fixture is integrally fixed to the fixing hook and the tension hook which elastically support the front and rear surfaces of the magnet with respect to the magnet insertion direction. Deflection yoke, characterized in that consisting of. According to claim 1, wherein the fixing hook is provided on the outer surface of the entry port of the fastener and has a locking jaw that one end is caught on the outer end of the magnet, the tension hook is once on the inner surface of the fixture opposite to the fixing hook The other end is connected to the deflection yoke, characterized in that extending to the tip end side of the magnet inserted into the fixture to form a locking step that is elastically engaged on one end of the magnet.