KR20030073949A - Deflection yoke - Google Patents

Abstract

PURPOSE: A deflection yoke is provided to allow the assembly work to be easily carried out by preventing the ring core unit from moving in rotation and vertical directions. CONSTITUTION: A deflection yoke comprises a coil separator including a screen portion and a rear cover(12), and inner and outer surfaces on which horizontal and vertical deflection coils are mounted; a ring core unit(20) coupled to the rear cover side and wound with a coil(21), wherein the ring core unit performs a focusing operation on a screen; a plurality of assembly grooves(30) formed at a constant interval at the top surface of the ring core unit; and a plurality of elastic hook pieces(40) protruded from the rear cover of the coil separator, wherein each of the elastic hook pieces has an end with a protrusion(41) to be inserted into the assembly groove formed at the ring core unit.

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 a deflection yoke for simplifying the assemblability of a ring core and maintaining a firm fixed state.

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 cross-sectional view showing a general deflection yoke, and as shown therein, a coil separator 10, which is mounted on one surface of a cathode ray tube and having an approximately conical shape, is provided. The coil separator 10 is a cathode ray tube. It consists of a screen portion 11 and a rear cover (12) coupled to the screen surface side of the core fixing portion 13 integrally formed from the center surface of the rear cover (12).

Here, the core fixing part 13 is coupled with a ring core unit 20 for adjusting the focus characteristic on the screen.

The coil separator 10 is provided with a horizontal deflection coil 14 and a vertical deflection coil 15 to form a horizontal deflection magnetic field and a vertical deflection magnetic field on the inner and outer surfaces, respectively, and the vertical deflection coil 15. It is provided to surround the structure is provided with a ferrite core 16 for strengthening the vertical magnetic field.

2 is a partial perspective view of a coil separator showing a core fixing part and a ring core unit according to the related art.

As shown therein, the core fixing part 13 is composed of a plurality of release preventing hooks 110 and a flow preventing hook 120 protruding from the rear cover 12, wherein the release preventing hooks 110 are end portions. The locking projection 110a is formed in contact with the upper surface of the ring core unit 20 is formed, and the flow preventing hook 120 is a flow formed at equal intervals on the outer peripheral surface of the ring core unit 20 The triangular fitting protrusion 120 is inserted into the prevention groove 320 is provided in a structure that is formed.

In this case, the pair of departure prevention hooks 110 are positioned at 180 degree intervals to face each other, and the pair of flow prevention hooks 120 are also positioned at 180 degree intervals to face each other.

The ring core unit 20 coupled to the core fixing part 13 has a substantially annular shape, and the coil 310 is wound at predetermined intervals to adjust the focus on the screen by a current applied from the outside.

The structure of the ring core unit 20 will be described in more detail. In order to be fixed to the core fixing part 13 of the coil separator 10, a flow preventing groove recessed in a triangle shape with a predetermined depth on the inner circumferential surface at regular intervals. 320 is formed, the flow preventing groove 320 is formed at a position corresponding to the flow preventing hook 120 of the core fixing portion 13 described above.

In the conventional deflection yoke having such a configuration, the ring core unit 20 is positioned at one side of the core fixing part 13 of the coil separator 10. Subsequently, the ring core unit 20 is downwardly positioned while the flow preventing groove 320 formed on the main surface of the ring core unit 20 is fitted to the flow preventing hook 120 provided on the rear cover 12. That is, when moving toward the core fixing portion 13, the separation prevention hook 110 is to apply a bearing force to the upper surface of the ring core unit (20).

Therefore, the ring core unit 20 is prevented from flowing in the rotational direction by the flow preventing hook 120 and the flow preventing groove 320 and the flow in the up and down directions by the release preventing hook 110. Will be.

However, in the conventional deflection yoke as described above, the ring core unit 20 has a problem in that assembly and productivity are deteriorated because the upper and lower flow prevention and the rotational flow prevention are made by separate structures.

That is, in order to fix the ring core unit 20 to the core fixing part 13, the operation of adjusting the assembly position so that the flow preventing groove 320 and the flow preventing hook 120 may be fitted to each other is preceded. In this case, the ring core unit 20 is moved to the rear cover 13 side to be assembled so as to be hooked through the release preventing hook 110, thereby reducing productivity due to complexity of the work process.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to improve the assemblability of the ring core unit coupled to the rear cover of the coil separator to simplify the assembling process to improve workability. The purpose is to provide a deflection yoke that can be made.

1 is a side view showing a general deflection yoke.

Figure 2 is a perspective view of the main portion of the deflection yoke according to the prior art.

Figure 3 is an excerpt perspective view of the main portion of the deflection yoke according to the present invention.

Figure 4 is a side view showing the assembled state of the ring core unit in the deflection yoke according to the present invention.

5 is a cross-sectional view taken along the line "A-A" in FIG.

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

10 coil separator 11 screen portion

12 rear cover 14 horizontal deflection coil

15 vertical deflection coil 16 ferrite core

20: ring core unit 21: coil

30: assembly groove 40: hook piece

41: turning

The deflection yoke according to the present invention for achieving the above object consists of a screen portion and a rear cover and the coil separator is provided with a horizontal deflection coil and a vertical deflection coil to form a horizontal deflection magnetic field and a vertical deflection magnetic field on the inner and outer surfaces; A ring core unit coupled to the rear cover side and having a coil wound at equal intervals to perform focus adjustment on a screen, and a plurality of assembling grooves formed at intervals on an upper surface of the unit of the ring core; And a plurality of hook pieces protruding from the rear cover of the coil separator and having protrusions formed at one end thereof to be elastically fitted into the assembly grooves formed in the ring core unit.

The assembly groove of the ring core unit of the present invention is characterized by being formed at intervals of 180 degrees.

The assembly groove of the ring core unit of the present invention is characterized in that it is formed at intervals of 90 degrees.

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

Figure 3 is a perspective view of the main portion of the deflection yoke according to the invention, Figure 4 is a side view showing the assembly state of the ring core unit in the deflection yoke according to the invention, Figure 5 is a view of the ring core unit in the deflection yoke according to the invention It is a top view which shows the assembly state.

Hereinafter, a description will be given with reference to FIG. 1 and like reference numerals refer to like parts.

First, as illustrated in FIG. 1, the deflection yoke is a coil separator 10, which is an injection-molded product coupled to one surface of a cathode ray tube, and is provided on the inner and outer surfaces of the coil separator 10, and a horizontal deflection magnetic field and a vertical deflection magnetic field. A horizontal deflection coil 14 and a vertical deflection coil 15, respectively, and a ferrite core 16 for strengthening a magnetic field through the horizontal deflection coil 14 and the vertical deflection coil 15, and a coil separator. It is provided on one side of 10) is composed of a ring core unit 20 for adjusting the focus characteristics on the screen.

Here, the coil separator 10 is divided into left and right symmetrical shapes and merged integrally, and has a substantially conical shape, and includes a screen portion 11 and a rear cover 12.

The configuration described above is similar to that of the conventional deflection yoke. However, the present invention is characterized in that the fixing structure of the ring core unit 20 can be made simpler to achieve assembly and productivity.

That is, according to the present invention, the ring core unit 20 is coupled to the coil separator by the mutually fitting structure at the mutually corresponding positions of the rear cover 12 and the ring core unit 20 of the coil separator 10. 10) is provided with a coupling means to be coupled by a simple assembly process while preventing the flow in the rotational and assembly direction about the center.

This coupling means is substantially as having a characteristic element of the present invention, as shown in the drawing consists of an assembly groove 30 formed on the upper surface of the ring core, and a hook piece 40 protruding from the rear cover 12 do.

Assembling groove 30 is formed in the ring core unit 20 having a ring shape at least two or more at equal intervals in the portion where the coil 21 is not wound. That is, the assembly groove 30 is formed at intervals of 180 degrees or 90 degrees not shown in the drawings as shown in the drawings of the present invention so as to receive a uniform support force from the plurality of hook pieces 40 to be described later Or it may be formed at an angle of less than that.

The hook piece 40 is integrally formed on the rear cover 12 of the separator 10 of the coil 21 and is formed at a position corresponding to the assembly groove 30. Like the assembly groove 30, the hook piece 40 is formed at least two or more at equal intervals and is made to have a predetermined elasticity.

On the other hand, the hook piece 40 is a protrusion 41 is formed in a direction facing each other, that is, in a direction opposite to the outer surface of the ring core unit 20, the protrusion 41 at this time is the assembly groove described above It is provided with a corresponding size to be fitted to the (30). In particular, the protrusions 41 are preferably formed in the shape of a triangular piece, the bottom of which is roughly processed.

In the deflection yoke according to the present invention having such a configuration, the ring core unit is assembled as follows.

First, the ring core unit 20 is positioned on one side of the rear cover 12 of the coil 10 separator 10, and the rear cover 12 is formed by an assembly groove 30 formed on the upper surface of the ring core unit 20. Adjust the assembly position so that the hook piece 40 of the protrusion 41 is fitted.

Subsequently, when the ring core unit 20 is moved to the rear cover 12 side, the plurality of hook pieces 40 cause elastic displacement to the outside due to the entry of the ring core unit 20, and the ring core unit 20 ) Is fully entered, the hook piece 40 is a position return by the elastic force while the protrusion 41 is fitted into the assembly groove 30 of the ring core unit 20.

Therefore, the ring core unit 20 can be stably prevented from flowing in the rotational direction and the assembling direction in the assembled state on the rear cover 12.

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.

The deflection yoke according to the present invention configured and acted as described above can shorten the assembly process since the hook piece and the assembly groove can stably prevent the flow of the ring core unit in the rotational direction and in the up and down directions. It provides an effect that can improve the assembly and productivity.

Claims (3)

A coil separator having a screen portion and a rear cover and having a horizontal deflection coil and a vertical deflection coil forming horizontal deflection magnetic fields and vertical deflection magnetic fields on inner and outer surfaces thereof; A ring core unit coupled to the rear cover side and having a ring shape in which coils are wound at equal intervals to perform focus adjustment on a screen; A plurality of assembling grooves formed on the upper surface of the unit of the ring core at intervals; A plurality of elastic hook pieces protruding from the rear cover of the coil separator and having protrusions formed at one end thereof in an assembly groove formed in the ring core unit; Deflection yoke, characterized in that consisting of. The deflection yoke of claim 1, wherein the grooves of the ring core unit are formed at intervals of about 180 degrees. The deflection yoke of claim 1, wherein the grooves of the ring core unit are formed at intervals of 90 degrees.