KR100824890B1 - Deflection york of CRT - Google Patents

Abstract

The present invention relates to a deflection yoke of a cathode ray tube, and an object of the present invention is to eliminate a horizontal error of convergence in the entire screen of a cathode ray tube so that a cathode ray tube display device without color errors can be realized. By winding a plurality of times in the upper and lower portions approximately along the direction, the horizontal deflection coil for adjusting the horizontal direction of the electron beam emitted from the electron gun, and wound around the left and right portions a plurality of times in the longitudinal direction of the cathode ray tube, In a deflection yoke of a cathode ray tube made of a vertical deflection coil for adjusting a vertical direction of an electron beam emitted from the beam, at least one of the horizontal deflection coil and the vertical deflection coil has a pair of longitudinally parallel portions formed therein, Both ends of the longitudinal portion are formed with a connecting portion protruding outward, the outer side of the longitudinal portion If there, also it characterized in that the thickness of the coil is relatively thin so as to allow to eliminate the convergence error (convergence error), facing the concave section is formed to the inner surface.

Cathode ray tube, deflection yoke, horizontal deflection coil, vertical deflection coil

Description

Deflection yoke of cathode ray tube {deflection york of CRT}

1 is a perspective view showing a deflection yoke of a cathode ray tube according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. 1.

FIG. 3 is an explanatory view showing a comparison of magnetic force lines generated in a deflection yoke and a deflection yoke of a cathode ray tube according to the present invention.

4 is an explanatory view showing a state in which the electron beam is deflected by the deflection yoke of the cathode ray tube and the magnetic force lines generated in the conventional deflection yoke according to the present invention.

Fig. 5 is a perspective view showing a concave winding and a convex winding for a deflection coil for winding a horizontal deflection coil in a deflection yoke of a cathode ray tube according to the present invention.

Fig. 6 is a bottom view showing the concave winding of the winding shown in Fig. 5;

7 is a cross-sectional view showing a state in which a horizontal deflection coil is wound in a concave winding and a convex winding in a deflection yoke of a cathode ray tube according to the present invention.

8A to 8C are front, side and plan views showing a body used for another deflection yoke according to the present invention.

9 is a cross-sectional view showing a state in which a coil is wound around the body shown in FIGS. 8A to 8C.

10 is a side view showing a state in which a deflection yoke is mounted on a general cathode ray tube.                 

11A and 11B are side and front views showing a general deflection yoke.

12A and 12B are external views of a saddle coil used in a general deflection yoke.

Fig. 13 is an explanatory diagram showing a display screen of a cathode ray tube.

14 is an explanatory diagram showing another display screen of the cathode ray tube.

-Description of the main symbols in the drawings-

One; Electron gun 2; Fluorescent surface

3; Deflection yoke 4; Horizontal deflection coil

5; Insulation frame 6; Vertical deflection coil

7; Ferrite core 8; Horizontal convergence

9; Lower part of horizontal deflection coil

10; Longitudinal convergence on the diagonal axis

11; Upper part of horizontal deflection coil (saddle coil)

12; Inner surface 13 of the deflection coil; Outer surface of deflection coil

14; Rough grooves formed on the outer surface of the deflection coil

15; Length deflector 16 of the deflection coil; Connection of deflection coil

17; Coil 21; Convex winding

22; Concave winding 24; Inner surface of concave sill

25; About turning 26; Coil guide wall

27; Body 28a, 28b; A ruler                 

29a, 29b; First and second hill portions 40; Cathode ray tube

The present invention relates to a deflection yoke of a cathode ray tube, and more particularly, to a deflection yoke of a cathode ray tube coupled to a cathode ray tube of a television receiver.

The electron beam emitted from the electron gun is driven by the high voltage and goes straight to the screen (fluorescent surface), so if nothing is done, it only emits the phosphor in the center of the screen. Therefore, in order for the electron beam to reach the screen in the order of scanning, it is necessary to change the electron beam sequentially by performing some action from the outside, and the deflection yoke is a component that performs the deflection action.

The deflection yoke is a horizontal deflection coil that is installed in a large, vertical symmetry to generate a horizontal deflection magnetic field, a vertical deflection coil that is installed in a symmetrical direction to generate a vertical deflection magnetic field is formed integrally, such coil There are various shapes. More precisely, a magnetic field passing in the vertical direction is formed by the horizontal deflection coil, thereby deflecting the horizontal direction of the electron beam going straight. (Lorentz force) Similarly, a horizontal deflection coil passes in the horizontal direction. A magnetic field is formed, whereby the vertical direction of the straight electron beam is deflected.

The conventional deflection yoke and the deflection coil wound thereon will be described with reference to FIGS. 10 to 14 as follows.

10 is a view in which a conventional deflection yoke 3 is coupled to a cathode ray tube 40. The cathode ray tube 40 is approximately funnel-shaped, and an electron gun 1 is installed at the rear end thereof. In the electron gun 1, three electron beams of red electron beams, blue electron beams, and green electron beams are emitted in a horizontal line, and the electron beam collides with the fluorescent surface 2 at the tip of the cathode ray tube 40 to emit light. Further, when all three electron beams coincide with one point on the fluorescent surface, a white screen is obtained.

Usually, the coil distribution adjustment that makes the three electron beams coincide on the fluorescent surface is called convergence adjustment. For this purpose, a deflection yoke 3 is provided in the middle of the electron gun 1 and the fluorescent surface 2. The electron beam emitted from the electron gun 1 by the deflection yoke 3 is deflected in a predetermined direction, whereby a predetermined image appears on the fluorescent surface.

The deflection yoke used in this manner will be described with reference to Figs. 11A and 11B.

As shown, the deflection yoke 3 is composed of a horizontal deflection coil 4, an insulating frame 5, a vertical deflection coil 6, a ferrite core 7, and the like from the inner side, that is, the side in contact with the cathode ray tube. .

That is, the inner surface of the horizontal deflection coil 4 is formed with the same curvature as the surface of the cathode ray tube, so that the horizontal deflection coil 4 is in contact with the surface of the cathode ray tube.

In addition, the insulating frame 5 outside the horizontal deflection coil 4, the vertical deflection coil 6 on the outside of the insulating frame 5, and the outer side of the vertical deflection coil 6, that is, the outermost circumference Ferrite core 7 is provided.

In order to match the three electron beams of the cathode ray tube to one point on the fluorescent surface using the deflection yoke 3 configured as described above, a deflection magnetic field (magnetic field line) generated from the deflection coil must be adjusted. For this reason, the coil distribution of the said deflection coil is adjusted. As described above, this is called convergence adjustment, and convergence that cannot be solved even by adjusting the coil distribution is called a convergence error.

Next, for the adjustment of the convergence of the coil distribution in the horizontal deflection coil 4, refer to the external view of the horizontal deflection coil (saddle coil) shown in Figs. 12A and 12B, and the cathode ray tube screens shown in Figs. 13 and 14. Will be explained. 13 and 14, the solid line shows the trace of the red electron beam, and the dotted line shows the trace of the blue electron beam.

In the case of the horizontal deflection coil 4, an important part of the convergence is the horizontal direction convergence on the horizontal axis called the X axis. This is called XH (indicated by reference numeral 8 in FIG. 13). This XH adjustment is performed by appropriately adjusting the thickness of the lower end portion (shown by reference numeral 9 in Fig. 12) of the horizontal deflection coil. The next important thing is the longitudinal convergence on the diagonal axis. This is called PQV (shown by reference numeral 10 in Fig. 13). The PQV is adjusted to the winding width (indicated by reference numeral 11 in Fig. 12) of the upper end portion in the horizontal deflection coil.

However, even if the coil distribution is adjusted by the thickness of the lower end and the winding width of the upper end of the horizontal deflection coil as described above, not all convergence errors can be solved in the cathode ray tube screen. That is, since the above-described electron beams are arranged in a horizontal line, there is a disadvantage that the convergence error in the lateral direction cannot be solved even though the convergence error in the longitudinal direction can be solved.

Particularly problematic with the lateral convergence error is a horizontal convergence error occurring in four portions located in the middle of the horizontal axis and the diagonal axis indicated between the arrows in FIG.

The convergence error of the above portion cannot be suppressed even if the lower end thickness of the horizontal deflection coil is changed or the winding width of the upper end is changed.

Therefore, when such a convergence error occurs, color error occurs on the cathode ray tube screen, thereby degrading the quality of the cathode ray tube as a display device.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to remove the horizontal convergence error on the entire screen of the cathode ray tube, it is possible to implement a cathode ray tube display device without color errors It is to provide a deflection yoke of a cathode ray tube.

In order to achieve the above object, the present invention is a deflection yoke of the cathode ray tube is wound around the upper and lower portions of the cathode ray tube a plurality of times, the horizontal deflection coil for adjusting the horizontal direction of the electron beam emitted from the electron gun, In the deflection yoke of a cathode ray tube made of a vertical deflection coil that adjusts the vertical direction of an electron beam emitted from an electron gun by winding a plurality of times at approximately left and right portions along a longitudinal direction of the cathode ray tube, the horizontal deflection coil or vertical deflection. At least one of the coils of the coil has a pair of longitudinal sections which are substantially saddle-like in parallel, and both ends of the longitudinal section are provided with connecting portions protruding outwardly, and the outer surface along the longitudinal direction of the longitudinal section is By reducing the thickness of the coil, the convergence error can be eliminated. To this end, it is characterized in that the groove portion toward the inner surface is formed.

Here, the recess is formed in a pair of parallel longitudinal portions, respectively, may be formed in a shape symmetrical to the areas adjacent to each other in each longitudinal direction.

In addition, the groove portion may have a length formed along the longitudinal direction of the deflection coil larger than the width formed along the connection portion of the deflection coil.

In addition, the groove may have a depth equal to or smaller than the width.

In order to achieve the above object, the present invention provides a saddle-shaped body divided into two parts along the longitudinal direction, and a plurality of horizontal deflection coils or vertical deflection coils can be stably wound and seated in the longitudinal direction on the inner surface of the body. In the deflection yoke of the cathode ray tube consisting of a plurality of guide walls formed by protruding a predetermined length so as to be protruded, and a plurality of hooks formed to hang the coil on the upper and lower ends of the body, a partial guide of the body Between the walls, the hills are in contact with the coil and have a predetermined thickness so that the thickness of the seated plurality of horizontal deflection coils or vertical deflection coils can be thinner than the corresponding coil thicknesses of both sides.

Here, the thickest first hill portion may be formed in a region where the thickness of the thinnest coil is formed, and second hill portions having a thinner thickness may be formed on both sides of the first hill portion.

According to the deflection yoke of the cathode ray tube according to the present invention as described above, a deflection coil (two saddle lengthwise portions and a connection portion formed of a pair of longitudinal portions that form an approximately saddle shape and a connection portion connecting the longitudinal portions are combined. In the form of a funnel, by forming a substantially recessed portion facing the inner surface on a part of the outer surface constituting the longitudinal portion, the coil thickness of the recessed portion becomes thin and a magnetic field generated from the coil located in the portion (magnetic field line) ) Intensity is reduced, and the horizontal convergence error occurring in the portion located in the middle of the horizontal axis and the diagonal axis of the cathode ray tube screen most relevant to the deflection of the portion is eliminated. That is, the color error of the entire cathode ray tube screen is eliminated, and thus the cathode ray tube screen has a high quality.

Of course, in another embodiment, a structure having a predetermined thickness between the guide walls of the body winding the coil to form the deflection coil also implements a horizontal deflection coil or a vertical deflection coil structure having the grooves as described above. Therefore, the advantages also appear the same.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

(Example 1)

 1 is a perspective view showing a horizontal deflection coil of a deflection yoke according to an embodiment of the present invention.

Here, reference numeral 12 is an inner surface of the deflection coil, 13 is an outer surface of the deflection coil, and 14 is an approximately groove portion formed toward the inner surface from the outer surface of the deflection coil.

In the deflection coil, 15 is a longitudinal portion, and 16 is a connecting portion.

In this way, the inner surface 12 and the outer surface 13 of the deflection coil are portions corresponding to the inside and the outside of the longitudinal portion 15 of the deflection coil, and the connecting portions 16 are formed at both ends of the longitudinal portion 15. It is.

In this embodiment, the substantially recessed portion 14 facing the inner surface 12 formed at the outer surface 13 of the deflection coil is formed over the range of approximately 70% of the deflection coil longitudinal direction 15. Moreover, the width | variety of the said recessed part 14 is the largest in the vicinity of the center part, and is formed so that it may go to the edge part and may be completely extinguished at the converging part.

In addition, the depth of the groove portion 14 is formed to have the same dimension as the width or small in the vicinity of the central portion, and is formed to decrease toward the end and completely eliminated at its convergence portion.

In the following, reference is made to FIG. 2, which is a cross-sectional view taken along line AA ′ of FIG. 1, in order to explain the grooves 14 formed in the outer surface 13 of the deflection coil in more detail.

2 is completely symmetrical with respect to the Y axis. Thus, although the recess 14 is formed in two parts of the outer surface 13, the shape and the position thereof are exactly the same.

In addition, in the sectional drawing of FIG. 2, in order to make description easy, the shape when the electric current flows through the coil 17 is shown in the direction.

First, as the shape of the deflection coil, the inner surface 12 and the outer surface 13 are formed by one arc.

In other words, in the X-Y coordinates, the outer surface 13 is shifted from the origin to Xo and Yo, and forms an arc of radius Ro. In addition, the inner surface 12 forms an arc of a radius Ri with the center as the origin. However, the outer surface 13 is characterized in that the groove 14 is further formed toward the inner surface 12 which is the core of the present invention.

The grooves 14 are substantially elliptical centered on two points whose centers are XH1, YV1 and XH2, YV2.

In FIG. 2, the depth of the recess 14 is shown to be 18 and the width is 19. In FIG.

The effect of the horizontal deflection coil comprised in this way is demonstrated.                     

In the case of the deflection coil, a magnetic field (magnetic field line) is generated by passing a current through the coil wound several times.

Although the figure of FIG. 3 shows the cross section of a horizontal deflection coil, the right half shows the Example of this invention, and the left half shows the cross section of the conventional deflection coil, and can compare with each other.

In the case of the horizontal deflection coil, almost identical deflection coils are disposed above and below, and the magnetic force lines 20 are formed by the current flowing through the coil wound around the inner surface 12 and the outer surface 13 of the left and right sides. . In the above embodiment, the number of magnetic lines of force is indicated by ① to ⑦.

First, the difference in the lines of magnetic force can be seen, but the centers of the lines of magnetic force in the left half conventional deflection coil are all on the X axis. On the other hand, the magnetic force line of the deflection coil of the embodiment of the present invention is formed around the center of the substantially recessed portion 14 whose magnetic line of innermost ① is directed from the deflection coil outer surface 13 of the present invention toward the inner surface 12. have.

This is because, by the rough groove portion 14 from the deflection coil outer surface 13 toward the inner surface 12, the coil existing in the portion has been removed. It is.

 In other words, the magnetic field lines of ① are not circular arcs centered on the X axis, but magnetic lines of the form surrounding the X axis. In addition, the magnetic lines of force from 2 to 7 are similar to the conventional ones. This means that the coil of the present invention hardly affects when the electron beam passes near the deflection coil center portion, but the deflection coil of the present invention exhibits a great effect when the electron beam passes near the end of the coil.

In other words, it is not a significant change, but an effective means in the case where a change is required locally.

Next, as the movement (deflection) of the electron beam, the electron beam is subjected to a force according to Fleming's left hand law with respect to the line of magnetic force.

That is, the effect of the electron beam on the magnetic field lines ① will be described with reference to FIG. 4 in comparison with the conventional example.

In Fig. 4,? Indicates the position of the blue electron beam,? Indicates the position of the red electron beam, and a white arrow shown in contact with the electron beam indicates the direction of the force acting on the electron beam.

First, in the conventional example on the left side, in this case, since the direction of the magnetic force line of ① and the direction of the magnetic force line of ② are almost the same direction, the blue electron beam ○ and the red electron beam ● receive the force in the same direction, that is, the same transverse force.

On the other hand, in the case of the embodiment of the present invention, the magnetic force line? Affects the red electron beam?, But since the magnetic force line is in the oblique direction, a force is added to the red electron beam? In a direction substantially perpendicular to the inclination direction of the magnetic force line. This is because, as is well known, charged particles (e.g., electrons) are forced in a direction perpendicular to the direction of the lines of magnetic force and their own traveling direction, and as a result, the traveling direction of the charged particles is changed in the direction of the force. You can tell from the Lorentz force.

In addition, since the magnetic field force ② affects the blue electron beam ○, the same lateral force as in the prior art is affected. As a result, the red electron beam? Becomes weaker in the lateral direction than the blue electron beam?, And is deflected in the longitudinal direction.

In other words, the force acting on each electron beam is different and thereby the traveling direction of each electron beam is also different, whereby the convergence error as in the prior art can be solved.

As described above, as an embodiment of the present invention, an approximately elliptical rough groove portion centered on two points has been described, but the groove portion does not necessarily have an elliptic shape, and the shape of the rough groove portion is also required for the cathode ray tube screen. If the groove portion toward the inner surface from the deflection coil outer surface to be determined, the shape will be freely changeable.

(Example 2)

5 is a view for explaining a convex winding and a concave winding as another embodiment of the present invention. Here, 21 is a convex winding, 22 is a concave winding, and 25 is a rough process which makes the recessed part toward an inner surface from the outer side of a deflection coil. The deflection coils are formed by winding between the gaps between the convex windings 21 and the concave windings 22.

In addition, the convex winding 21 forms the inner surface of the deflection coil, and the concave winding 22 forms the outer surface. Moreover, the groove | channel part of the predetermined depth and width which extends from the outer surface of a deflection coil toward an inner surface by the protrusion 25 formed in the said concave winding 22 is formed.

6 is a bottom view of the concave winding frame. Here, 24 is an inner surface of the concave winding which forms a deflection coil outer surface.

In two places of the surface 24, raised projections 25 are formed, which form roughly grooves from the deflection coil outer surface toward the inner surface.

In this embodiment, the substantially protrusions 25 have the widest width at the center portion, and the inner portions at both ends thereof converge.

The cross section of the protrusion will be described in detail with reference to FIG.

That is, the outer surface of the deflection coil is formed by arc R24 centered on the point on the inner side of the outer surface, and the projection 25 is formed by arc R25 centered on the point placed on the outer side of the outer surface. Each of the protrusions 25 has a shape in which the arc is inverted, but since the protrusions 25 are located on the inner surface side of the outer surface 24, they do not become an obstacle when winding the coil.

(Example 3)

8A to 8C are front, side and plan views showing an insulating body of a deflection yoke of a cathode ray tube according to another embodiment of the present invention.

Generally, such a body is also called a winding frame or a slot winding, and a coil is wound directly on the body and used as a deflection coil.

Here, 26 are formed at the electron gun side and eight at the fluorescent surface side as coil guide walls. 27 is a substantially saddle-shaped body with a plurality of coil guide walls formed on an inner surface thereof. 28a and 28b are hook portions to which the coil is wound and are formed in the extension portion of the coil guide wall. A plurality of phosphorus portions 28a and 28b are formed on the electron gun side and the fluorescent surface side, respectively.

The lengthwise portion of the deflection coil described above is wound and seated a plurality of times between the coil guide walls 26 of the body 27, the electron gun side connection part is the electron gun side guard part 28a, and the fluorescent surface side connector is the fluorescent surface side guard part. It is wound around 28b.

In the deflection yoke configured as described above, the conventional method of adjusting the distribution of the deflection coils has been performed by adjusting the number of turns of each coil wound between the guide walls 26.

However, since the wound coil is stacked from the body, the surface located at the innermost surface, which is the last winding portion of the stacked coil, for example as a horizontal deflection coil, does not necessarily contact the cathode ray tube surface. For example, in the coil wound around the body, even if the surface thereof corresponds to the surface of the cathode ray tube, the coil wound around the adjacent body did not come into contact with the surface of the cathode ray tube and had a surface farther from the surface.

In consideration of such deflection of the electron beam, the efficiency of the deflection coil appears differently depending on how close the deflection coil is located to the electron beam. In general, the efficiency of a deflection coil is related to the square of the electron beam and deflection coil distance.

In other words, if the deflection coil is close to the electron beam, the efficiency of the deflection coil is improved.

By the way, in the conventional distribution adjustment of the deflection coil, there is a disadvantage in that the efficiency of the deflection coil is lowered because the distance between the electron beam and the deflection coil is not optimal.

 In order to solve this problem, it is effective to form hill portions 29a and 29b having a predetermined thickness on the surface of the body 27 located between the guide walls 26.

9 is a sectional view showing a deflection yoke in which a coil 17 is wound around the body 27 shown in FIGS. 8A to 8C.

In the figure, 29a is a first hill portion formed to face the inner surface from the outer surface of the deflection coil 17. In this embodiment, the first hill portion 29a is formed in the center, and the second hill portion 29b is formed on both sides of the first hill portion 29a.

Further, the hill portions are formed in three different body surfaces with different thicknesses. That is, the first hill portion 29a having the thickest thickness is formed in the center, and the second hill portion 29b having a thickness smaller than the first hill portion 29a on both sides of the first hill portion 29a. ) Are formed respectively. Therefore, the thickness of the coil 17 seated between the first hill portion 29a and the guide wall 26 is formed to be the thinnest, and the thickness of the coil seated on the second hill portion 29b is next thickest. Of course, the thickest coils are seated along the guide wall on the body surface where the first and second hills are not formed.

As described above, the first and second hills have an effect of reducing the thickness of the wound coil, and as a result, the coil wound on the body surface having a small number of turns of the coil due to the distribution of the deflection coil is closer to the deflection coil surface. There is.

As a result, the distribution of the deflection coils is adjusted so that the amount of coils wound on the surface of each body does not necessarily fill the coils between the guide walls. By making contact, the efficiency of the deflection coil is improved.

In addition, the range of the 1st, 2nd hill part of such a body does not necessarily need to be in all the ranges of the same part, For example, even if it forms only in a some range, it does not become a problem at all.

In addition, the same first and second hills themselves may be slightly different in thickness. That is, it is also possible to form a thick portion and a thin portion of the hill portion on the body surface between the same guide wall.

As described above, although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto, and various embodiments may be modified without departing from the scope and spirit of the present invention.

Therefore, according to the deflection yoke of the cathode ray tube according to the present invention, in the saddle-type deflection coil composed of a pair of longitudinal sections forming a saddle shape and a connecting portion connecting the longitudinal sections, a part of the outer surface constituting the longitudinal sections By forming a substantially recessed portion facing the inner surface of the groove, the coil thickness of the recessed portion becomes thinner, the strength of the magnetic field generated from the coil located in the portion is reduced, and the horizontal axis of the cathode ray tube screen most relevant to the deflection of the portion and The horizontal convergence error occurring in the middle of the diagonal axis is eliminated. That is, the color error of the cathode ray tube full screen is eliminated, so that the cathode ray tube screen is made of high quality.                     

Of course, a structure having a predetermined thickness between the guide walls of the body winding the coil to form the saddle-shaped deflection coil also implements a horizontal deflection coil or a vertical deflection coil structure having the grooves as described above. The effect is the same.

Claims (6)

The deflection yoke of the cathode ray tube is wound up and down a plurality of times along the longitudinal direction of the cathode ray tube, so that the horizontal deflection coil adjusts the horizontal direction of the electron beam emitted from the electron gun, and the left and right along the longitudinal direction of the cathode ray tube. In the deflection yoke of a cathode ray tube made of a vertical deflection coil which adjusts the vertical direction of an electron beam emitted from an electron gun by winding a plurality of times in a portion, At least one of the horizontal deflection coil or the vertical deflection coil, the deflection coil, A pair of longitudinal sections are formed in parallel to each other as a saddle shape, and both ends of the longitudinal section are provided with connecting portions protruding outward, and the outer surface along the longitudinal direction of the longitudinal section has a relatively thin coil thickness. In order to solve the convergence error, a recess is formed toward the inner surface, The groove portion has a length smaller than the length of the longitudinal portion, and the groove portion is wider at the center portion, the deflection yoke of the cathode ray tube, characterized in that formed to decrease and disappear toward the end. The deflection yoke of a cathode ray tube according to claim 1, wherein the grooves are formed in a pair of longitudinally parallel portions, respectively, and are formed in a shape symmetrical with regions adjacent to each other in the respective longitudinal portions. The deflection yoke of claim 1 or 2, wherein the groove portion has a length formed along the longitudinal direction portion larger than a width formed along a connection portion of the deflection coil. 4. The deflection yoke of a cathode ray tube according to claim 3, wherein the groove portion has a depth equal to or smaller than a width. Saddle-shaped body divided into two along the longitudinal direction, and a plurality of guide walls formed by protruding a predetermined length so that a plurality of horizontal deflection coils or vertical deflection coils in the longitudinal direction on the inner surface of the body can be stably wound and seated And, in the deflection yoke of the cathode ray tube composed of a plurality of hook portion formed to wind the coil on the upper and lower ends of the body, Between some guide walls of the body, a hill portion having a predetermined thickness in contact with the coil is formed so that the thickness of the seated plurality of horizontal deflection coils or vertical deflection coils may be thinner than the corresponding coil thicknesses of both sides. Deflection yoke of cathode ray tube. 6. The cathode ray beam according to claim 5, wherein the hill portion has a thickest first hill portion formed in an area where the thickness of the thinnest coil is formed, and second hill portions having a thinner thickness are formed on both sides of the first hill portion. Deflection yoke of the tube.

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