KR20040090176A - Bobbin type deflection yoke - Google Patents

Abstract

PURPOSE: A bobbin type deflection yoke is provided to fix accurately a top of a ferrite core to a top of a vertical surface of a V-guide when the ferrite core is inserted into the V-guide. CONSTITUTION: A bobbin type deflection yoke comprises a V-guide(120) including a top and a bottom having slits and a vertical surface having at least a pair of bosses; a con type ferrite core(130) having a groove to be inserted into the bosses of the V-guide; a vertical deflection coil for fixing the ferrite core through the slits; a coil separator inserted into the inside of the ferrite core and having slits; a flange mounted on the bottom of the coil separator and having slits; and a horizontal deflection coil wound through the slits of the coil separator and the slits of the flange.

Description

Bobbin type deflection yoke {BOBBIN TYPE DEFLECTION YOKE}

The present invention relates to a bobbin type deflection yoke. More specifically, in the bobbin-type deflection yoke, a projection is formed on the fastening surface of the V-guide and a groove is formed so that the projection is also fastened to the ferrite core inserted and fastened to the V guide. A bobbin-type deflection yoke proposed to improve the position of the beam strike neck (BSN) while at the same time eliminating the positional unbalance generated when the V guide is engaged.

In general, an image display apparatus using a television receiver, a computer monitor, and other cathode ray tubes is provided with a deflection yoke for deflecting an electron beam generated by an electron gun. That is, cathode ray tubes such as color receiving tubes and monitors use in-line electron guns that emit electron beams from three electron guns arranged in a line on the same horizontal plane. The deflection yoke is used to converge. In addition, the deflection yoke includes a vertical deflection coil for deflecting the electron beam emitted from the inline electron gun of the neck portion in the vertical direction, a horizontal deflection coil for deflecting the electron beam in the horizontal direction, and a loss of magnetic force of the vertical deflection magnetic field generated in the vertical deflection coil. It is essentially provided with a conical ferrite core to reduce the magnetic efficiency.

On the other hand, the deflection yoke can be roughly classified into a saddle type deflection yoke and a bobbin type deflection yoke.

Saddle-type deflection yokes are mainly mounted on television receivers and can be classified into saddle-saddle type and saddle-toroidal, depending on the winding type of the vertical deflection coil, and FIG. The saddle-troidal type is shown by way of example. Referring to this, the horizontal deflection coils 6 for forming a horizontal magnetic field are provided inside the coil separator 4 in pairs, and the vertical deflection coils 8 for forming a vertical magnetic field are also paired in ferrite. It is wound around the core 11 and provided outside the coil separator 4. On the other hand, the ferrite core 11 for improving the magnetic efficiency by reducing the magnetic force loss of the vertically deflected magnetic field is divided into the outer side of the coil separator 4 as shown, and flows in the space coupled with the coil separator 4 A wedge such as a sponge is filled to a predetermined position of the coil separator 4 so as not to prevent it, and then the ferrite core 11 is fixed by applying hot melt to the ferrite core 11.

On the other hand, the bobbin-type deflection yoke is mainly mounted on a computer monitor, the horizontal deflection coil and the vertical deflection coil, respectively, in the horizontal coil separator and V-guide having a plurality of pins for fixedly distributing the coil. It is characterized in that the winding, the present invention relates to a bobbin-type deflection yoke.

As shown in FIG. 2, the bobbin-type deflection yoke has a V guide 20 having a plurality of slits 21 and 22 formed on an upper surface and a lower surface thereof, and a vertical surface 23 of the V guide 20. Consists of a through ferrite core 30 is inserted to match the upper surface of the. When the ferrite core 30 is inserted into the V guide 20, the vertical deflection coil not shown fixes the ferrite core 30 through the slits 21 and 22 formed on the upper and lower surfaces of the V guide 20. Distribution winding. Thereafter, the coil separator 40 having the slit 41 formed thereon is inserted into the tube ferrite core 30 inserted into the V guide 20, and the slit 51 is formed on the bottom surface of the coil separator 40. The flange 50 is mounted, and a horizontal deflection coil, not shown, is distributed and wound through the slit 41 formed on the upper surface of the coil separator 40 and the slit 51 formed on the flange 50.

For reference, when the bobbin-type deflection yoke is compared with the saddle-type deflection yoke, the bobbin-type deflection yoke uses a ferrite core 30 while the saddle-type deflection yoke uses a two-part ferrite core 11. In addition, in the bobbin type deflection yoke, the vertical deflection coil is wound on the V guide 20, and the through ferrite core 30 is fixed by the vertical deflection coil wound on the V guide 20. 11) The ferrite core is wound directly on the toroidal type and is different from the saddle type deflection yoke that is fixed by application of hot melt.

According to the bobbin-type deflection yoke as described above, when the tube ferrite core 30 inserted into the V guide 20 is fixed to the V guide 20, the upper surface of the tube ferrite core 30 is vertical to the V guide. It should be exactly matched to the top of 23). However, since the diameter of the tubular ferrite core 30 is formed to be shorter than the diameter of the vguide 20 to facilitate insertion into the vguide 20, when the tubular ferrite core 30 is inserted into the vguide 20. The upper surface of the tube ferrite core 30 is inserted deeper than the upper surface of the vertical surface 23 of the V guide 20, the upper surface of the tube ferrite core 30 coincides with the upper surface of the vertical surface 23 of the V guide 20. Otherwise, the ferrite core 30 is installed backward in the screen direction than intended. Therefore, the beam hits the wall of the CRT funnel, causing a BSN phenomenon, in which a color appears at the corner of the screen, and thus, there is a problem in that good image is difficult to implement.

Even if it is not easy to insert into the V guide 20, the diameter of the tube ferrite core 30 is borrowed to fit the larger, so that the upper surface of the tube ferrite 30 is the vertical surface of the V guide 20 (23) Attempts have been made to prevent the deeper insertion of the ferrite core 30 through the slits 21 and 22 formed on the upper and lower surfaces of the Vguide 20. In the process, the ferrite core 30 was shaken or left out of position and the front, rear, left and right surfaces were twisted and fixed, which caused assembly scattering and screen characteristic scattering, thereby making it impossible to realize a quality screen.

The present invention has been made to solve the above problems, and an object of the present invention is that the upper surface of the tube ferrite core is exactly coincident with the upper surface of the vertical surface of the V guide when the tong ferrite core in the V guide is fixed to the V guide It is to provide a bobbin type deflection yoke to be fixed. As a result, it is intended to realize a good image with improved BSN phenomenon.

It is another object of the present invention to provide a bobbin-type deflection yoke in which the vertical deflection coils are not twisted in the front, rear, left and right surfaces of the ferrite core while the vertical deflection coil fixes the ferrite core through slits formed on the upper and lower surfaces of the V guide. To provide. Thus, to achieve a good quality screen with improved assembly and screen characteristics distribution.

Still another object of the present invention is to provide a bobbin-type deflection yoke in which the ferrite core is prevented from shaking or falling out when the vertical deflection coil is wound on the V guide.

The purpose of the V guide is a slit is formed on the upper surface and the lower surface, the projection is formed symmetrically on the vertical surface; A conical cylindrical ferrite core having grooves inserted into the left and right symmetrical projections of the V guide formed on an upper outer circumferential surface thereof; A vertical deflection coil which is distributed and wound while fixing the through ferrite core through slits on the upper and lower surfaces of the V guide; A coil separator inserted into the through ferrite core and having a slit formed on an upper surface thereof; A flange mounted on a lower surface of the coil separator and having a slit formed therein; It is achieved by providing a bobbin-type deflection yoke, characterized in that it comprises a horizontal deflection coil that is distributed winding through the slit of the coil separator and the slit of the flange.

1 is a view schematically showing a conventional saddle type deflection yoke,

2 is a view schematically showing a conventional bobbin type deflection yoke,

3 is an exploded perspective view of the deflection yoke according to the present invention;

4 is a perspective view of a deflection yoke according to the present invention;

5 is a perspective view in which the V guide and ferrite core are combined in the deflection yoke according to the present invention;

6A and 6B are views for explaining the projection of the V guide in the deflection yoke according to the present invention.

* Description of the symbols for the main parts of the drawings *

120: v guide 121: upper surface

122: bottom 124, 125, 141, 151: slit

126: vertical plane 127: projection

130: tongferrite core 131: home

140: coil separator 150: flange

160: vertical deflection coil 170: horizontal deflection coil

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view of the deflection yoke according to the present invention, Figure 4 is a perspective view of the deflection yoke according to the present invention.

Referring to this, the bobbin-type deflection yoke according to the present invention has a V guide 120, a through ferrite core 130, a coil separator 140, a flange 150, a vertical deflection coil 160 and a horizontal deflection coil 170. It includes.

The V-guide 120 has a lower surface 121 facing the screen side and a lower surface 121 facing the electron gun side, and an upper and lower narrow body 123 for unifying the upper surface 121 and the lower surface 122. Consists of The V guide 120 is made of an insulating material such as, for example, polycarbonate or polyphenylene.

As shown in the upper surface 121 and the lower surface 122 of the V-guide 120, a plurality of slits 124 and 125 with equal intervals are formed. The slits 124 and 125 extend from the inner side of the upper surface 121 or the lower surface 122 toward the outer side, and are spaced apart from the respective surfaces 121 and 122 from the outer side.

In addition, a vertical surface 126 having a predetermined width is formed to be substantially perpendicular to the inner surface of the upper surface 121, and protrusions 127 which are horizontally symmetrical protrude from the vertical surface 126. At least one pair of protrusions 127 is formed to be symmetrical with respect to one axis of the vertical surface 126. Those skilled in the art can increase or decrease the number of pairs of protrusions as needed.

The ferrite core 130 is a non-divided through ferrite core, the upper surface facing the screen side is provided in a conical shape having a larger diameter than the lower surface facing the electron gun side. The outer diameter of the upper surface of the ferrite core 130 is slightly larger than the inner diameter of the upper surface 121 of the V guide 120, so that the ferrite core 130 is tightly fitted when the ferrite core 130 is inserted into the V guide 120. .

The ferrite core 130 reduces the magnetic force loss of the vertical deflection magnetic field generated in the vertical deflection coil 160 to improve the magnetic efficiency. On the other hand, the upper outer peripheral surface of the ferrite core 130 is formed with a groove 131 into which at least a pair of symmetrical projections 127 formed on the vertical surface 126 of the V guide 120 can be inserted.

Similarly to the V guide 120, the coil separator 140 includes a top surface facing the screen side that is not shown and a bottom surface facing the electron gun side that are not shown. On the upper surface, a plurality of slits 141 are formed on the upper surface similarly to the V guide, and the lower surface is mounted on the flange 150.

The flange 150 has a plurality of slits 151 formed on the lower surface thereof, and the upper surface is mounted on the lower surface of the coil separator 140. Here, the upper surface of the flange 150 and the lower surface of the coil separator 140 are mounted to each other by a mounting means, various means such as pin coupling, screw coupling or bonding coupling may be applied.

According to the bobbin-type deflection yoke according to the present invention configured as described above, a ferrite core 130 is first inserted into the V guide 120, and a vertical deflection coil 160 is formed on the upper and lower surfaces of the V guide 120. Coil separator 140 having a slit 141 formed thereon is inserted into the ferrite core 120 in the V guide 120 while fixing and winding the ferrite core 130 through 124 and 125. On the lower surface of 141, a flange 150 having a slit 151 is mounted by mounting means.

Thereafter, the horizontal deflection coil 170 is wound through the slit 141 formed on the upper surface of the coil separator 141 and the slit 151 formed on the flange 150, and finally, as shown in FIG. 4.

Here, as described above, the insertion degree of the ferrite core 130 should be exactly the upper surface of the vertical surface 126 of the V guide 120 of the ferrite core 130. In the bobbin type deflection yoke according to the present invention, the inner diameter of the upper surface of the ferrite core 130 is slightly larger than the outer diameter of the upper surface of the V guide 120 so as to facilitate this.

In addition, according to the present invention, as shown in Figs. 3 and 4, at least one pair of left and right projections 127 are formed on the vertical surface 126 of the V-guide 120 with respect to one axis of the ferrite core 130 Grooves fastened to at least one pair of protrusions 1 which are symmetrical to the V guide 120 are formed on the upper outer circumferential surface thereof.

Accordingly, as shown in FIG. 5, in which the V guide and the ferrite core are coupled, the protrusions formed in the V guide 120 when the ferrite core 130 is inserted into the V guide 120 are formed. 127 is fastened to the groove 131 of the ferrite core.

This configuration increases the fastening strength by increasing the fastening area between the V guide 120 and the ferrite core 130 that are interfitted.

Thus, although the vertical deflection coil 160 is distributedly wound through the slits 124 and 125 of the V guide 120, the upper surface of the ferrite core 130 is inserted deeper than the upper part of the vertical surface of the V sude or Positional unbalance of the ferrite core caused by the ferrite core 130 is shaken or left out of position and the front, rear, left and right surfaces are distorted can be prevented.

Therefore, according to the bobbin-type deflection yoke according to the present invention, the problem of positional unbalance of the ferrite core can be improved, thereby achieving a high quality screen with improved assembly and distribution of screen characteristics.

In addition, since the phenomenon in which the upper surface of the ferrite core is inserted deeper than the upper portion of the vertical surface of the vsuede is prevented, the ferrite core is arranged to the screen side as compared to the conventional invention, thereby improving the BSN.

<Example>

For at least one pair of protrusions 127 formed on the vertical surface 126 of the vguide 120 as shown in FIG. 6A, the thickness t is 0.3 mm, the width w is 0.1 mm and The height h was formed to be 0.5 mm. In addition, the protrusion 127 is formed so that its upper surface coincides with the upper surface height of the vertical surface 126 of the V guide 120. This is to ensure that the upper surface of the ferrite core 130 is exactly coincident with the upper surface of the vertical surface 126 of the V guide 120.

In addition, the protrusion 127 is preferably formed on a vertical surface extending from the slit 124 formed on the upper surface of the V guide 120. This is because it is difficult to wind the vertical deflection coils when protrusions are formed on the vertical plane which does not extend from the slit.

Meanwhile, as shown in FIG. 6B, the groove 131 having the same dimension is formed on the outer circumferential surface of the ferrite core 130 to correspond to the dimension and the position of the protrusion. 130 is formed from the upper end of the upper peripheral surface of the ferrite core (130).

Experimental results showed the following good results.

Conventional technology Example 1 Average Position Unbalance of Tung Ferrite (mm) Left or right 1mm Left or right 0.5mm Average BSN 3.8mm 3.9 mm

As can be seen from the experimental results, it can be seen that the positional unbalance of the ferrite core is improved on average. In particular, it can be seen that the BSN is also improved because the ferrite core is mounted about 0.5 to 0.6 mm forward to the screen side compared to the conventional invention.

However, since the projections and the corresponding dimensions of the grooves are optimally formed in the V guide and the ferrite core used in the present embodiment, the dimensions of the projections and the grooves may be variously changed for the various V guides and the ferrite cores. Will be appreciated by those skilled in the art.

The remaining position balance in the above embodiment is inevitable due to manufacturing error or assembly error, and it is expected that more accurate results will be obtained if a more precise manufacturing process is performed.

As described above, according to the ferrite core fastening structure of the bobbin-type deflection yoke according to the present invention, the upper surface of the tube ferrite core is the vertical surface of the V guide when the tube ferrite core installed in the V guide is fixed to the V guide. The vertical deflection coil is fixed to the upper part and at the same time, the vertical deflection coils do not twist the front, rear, left, and right surfaces of the ferrite core through the slits formed on the upper and lower surfaces of the V guide. Not only can the assembly quality and the screen characteristic distribution be improved, it is possible to realize a good quality screen, and also to improve the BSN phenomenon.

Claims (5)

V guides are formed on the upper surface and the lower surface, and at least one pair of projections that are symmetrical on the vertical surface; A conical ferrite core having a groove which can be inserted into the protrusion of the V guide formed on an upper outer circumferential surface thereof; Vertical deflection coils which are distributed and wound while fixing ferrite cores through slits on the upper and lower surfaces of the V-guide; A coil separator inserted into the through ferrite core and having a slit formed on an upper surface thereof; A flange mounted on a lower surface of the coil separator and having a slit formed therein; Bobbin-type deflection yoke, characterized in that it comprises a horizontal deflection coil that is distributed winding through the slit of the coil separator and the slit of the flange. The bobbin type deflection yoke of claim 1, wherein the protrusion is formed on a vertical surface extending from a slit formed on an upper surface. The bobbin type deflection yoke according to claim 1 or 2, wherein the protrusions are formed at equal intervals. The bobbin type deflection yoke according to claim 1 or 2, wherein the protrusion is formed so that its upper surface is coincident with the upper surface of the vertical surface, and the groove of the ferrite core is formed from the upper end of the outer circumferential surface. The bobbin of claim 4, wherein the protrusion has a dimension of 0.3 mm in thickness, 0.1 mm in width, and 0.5 mm in height, and the groove of the ferrite core has a dimension corresponding to the protrusion of the V guide. Type deflection yoke.