KR100479452B1 - Winding machine for deflection yoke - Google Patents

Abstract

The present invention discloses a deflection yoke.

The present invention includes a mold having a screen portion and a neck portion provided at front and rear ends thereof, having a semi-conical curvature between the screen portion and the neck portion, and a winding portion at which a deflection magnetic field generating portion of the deflection coil is formed; A plurality of turning pins protruding from the screen of the mold to guide the windings of the coils to shape the deflection coils into a predetermined shape; A bypass pin protruding from the winding part of the mold to form a slot in the middle of the deflection coil so as to correct the magnetic field of the middle part of the deflection coil. There is an effect that can be easily corrected, and to reduce the production process and production costs.

Description

Winding machine for deflection yoke

The present invention relates to a deflection yoke winding machine for winding a deflection yoke of a deflection yoke, and more particularly, to a deflection yoke winding machine for winding a deflection coil in a form capable of changing the magnetic field in the middle of the deflection coil.

Generally, the deflection yoke used in the cathode ray tube (CRT) of a TV receiver or a monitor has various types such as saddle toroidal type and saddle-saddle type. Classified according to form.

Such a deflection coil is a saddle shape or a winding frame type that is wound and molded in a predetermined shape, and a coil wound around a ferrite core of a magnetic body formed in a cylindrical shape is called a troidal type.

Therefore, when saddle-type and troidal-type deflection coils are loaded on the deflection yoke, they are called saddle-troidal type, and when only saddle type is placed on the top, bottom, left and right sides, they are called saddle-saddle type.

Such a deflection yoke is well illustrated in FIG. 1, which is a side cross-sectional view of a general deflection yoke on the Z axis of the cathode ray tube 1 having the screen surface 1a and the electron gun portion 1c formed at the front and rear ends thereof. It is a figure which shows that the deflection yoke 10 is employ | adopted.

As shown, the deflection yoke 10 is formed in the shape of a trumpet, is a left-right symmetrical pair of coil separators 13 and the horizontal deflection magnetic field is placed on the inner and outer peripheral surface of the coil separator 13 And a horizontal deflection coil 12 and a vertical deflection coil 14 forming a vertical deflection magnetic field, and a ferrite core 15 provided to surround the outer circumferential surface of the vertical deflection coil 14 to reinforce the vertical deflection magnetic field.

Of course, the horizontal deflection coil 12 deflects the electron beam located inside the electron gun portion 1c of the cathode ray tube 1 in the horizontal direction, and the vertical deflection coil 14 deflects the electron beam in the vertical direction.

Here, the horizontal and vertical deflection coils (12, 14) in more detail with reference to Figure 2, Figure 2 is a plan view showing the deflection coil of the deflection yoke shown in Figure 1, representative of the horizontal deflection coil (12) Since the vertical deflection coil 14 is substantially the same as the horizontal deflection coil 12 shown, it will be omitted.

As shown, the horizontal deflection coil 12 has an outward flange-shaped screen vent part 12a and a neck vent part 12c formed at the front and rear ends thereof, and the screen vent part 12a and the neck vent part 12c. The intermediate portion 12b is integrally formed therebetween.

Of course, the deflection magnetic field for deflecting the electron beam is generated in the middle portion 12b, and the deflection magnetic field generated in the screen vent portion 12a and the neck vent portion 12c has a small magnetic force and thus does not affect the deflection of the electron beam. This is also commonly referred to as an invalid vent section.

Such deflection coils 12 and 14 are formed by a deflection yoke winding machine as shown in FIG. 3, FIG. 3 is a perspective view of a deflection yoke winding machine according to the prior art, and FIG. 4 is a mold shown in FIG. 3. Is a perspective view schematically showing.

As shown, the deflection yoke winding machine has a semi-conical curvature in the center, and is formed on both sides of the winding parts 24 and 34 in which the deflection coils 12 and 14 are formed, and the winding parts 24 and 34. It consists of a guide portion (26, 36) to guide the coil to the winding portion (24, 34) consists of a female and male mold (20, 30) coupled to each other.

At this time, the windings 24 and 34 of the female and male molds 20 and 30 correspond to each other so that the windings 24 of the female mold 20 are formed in a concave curved surface, and the male mold 30 The winding portion 34 is formed of a convex curved surface.

Meanwhile, turning pins 23 for guiding the windings of the coils are installed on the front side of the winding part 24 of the female mold 20 so that the shapes of the deflection coils 12 and 14 are formed in a predetermined shape. 23 are spaced apart from each other at a predetermined interval as shown in FIG.

Of course, the mold shown in FIG. 4 shows the female mold 20 of FIG. 3, and as shown, the female mold 20 is provided with a screen portion 22 at the front end side and a neck portion 25 at the rear end side. ) Is provided, and is formed of a winding portion 24 having a concave curved surface between the screen portion 22 and the neck portion 25.

In this case, the plurality of turning pins 23 described above are formed in the screen portion 22 in a symmetrical manner, and when only the turning pins 23 shown on the left side are seen, the turning pins 23 are formed from the upper end of the female mold 20. The first to fifth turning pins 23a, 23b, 23c, 23d, and 23e sequentially formed up to the lower end thereof.

In addition, the first to fifth turning pins 23a, 23b, 23c, 23d, and 23e are formed within 8 ° to 50 ° based on the upper horizontal axis H of the screen unit 22. The five turning pins 23a, 23b, 23c, 23d, and 23e are positioned on the angles of 8 °, 19 °, 28 °, 42 °, and 50 °, respectively, as shown.

The first to fifth turning pins 23a, 23b, 23c, 23d, and 23e may be spaced apart from each other by the installation angle of the turning pin 23, and the coil may be screened through the turning pin 23. It is wound around the winding section 24 while reciprocating the section 22 and the neck section 25.

That is, the coil is wound around the screen portion 22 and the neck portion 25 while passing through the turning pin 23 as a starting point, and thus the coil is wound around the turning pin 23, so the turning pin 23 is It serves to determine the overall shape of the deflection coils 12 and 14.

In other words, the turning pin 23 can be said to induce the winding of the coil so that the coil can form a constant winding form.

Therefore, the coil wound through the turning pin 23 is shaped into the same shape as the deflection coils 12 and 14 of FIG.

In more detail, the screen vent part 12a, the middle part 12b, and the neck vent part 12c of the deflection coils 12 and 14 are the screen part 22 and the winding part 24 of the female mold 20. And are formed in the neck portion 25, respectively.

In particular, an intermediate portion 12b, which is a portion of the deflection coils 12 and 14 that generates a deflection magnetic field that substantially deflects the electron beam, is formed in the winding portion 24 of the female mold 20, and The shape is determined by the installation angle of the turning pin 23.

On the other hand, reference numeral W is a welding point (welding point), a portion for welding in order to deform the deflection magnetic field of the middle portion 12b of the deflection coils (12, 14), the shape in which the weld is fixed by welding As a result, the shape of the intermediate portion 12b of the deflection coils 12 and 14 is also deformed.

Of course, the shape of the intermediate portion 12b of the deflection coils 12 and 14 may be deformed by grinding or cutting using a file or the like without welding to the W point.

That is, in the case of forming a protrusion protruding in the winding part 24 of the female mold 20, welding is performed, and in the case of forming a groove recessed in the winding part 24, the grinding or cutting is performed with a string. You can do

On the other hand, Figure 5 is a view showing the configuration and generating magnetic field of the deflection yoke employing the deflection coils (12, 14) formed by the deflection yoke winding machine according to the prior art as described above, Figure 5 is shown in Fig. A-A 'line sectional view and a deflection magnetic field conceptual diagram of the deflected yoke is shown, the deflection magnetic field shown is a lower and left deflection state.

As shown, the deflection yoke 10 has horizontal and vertical deflection coils 12 and 14 stacked inside and outside with respect to the coil separator 13, and the ferrite core 15 is disposed on the outer circumferential surface of the vertical deflection coil 14. ) Is placed, and B, G, and R of the electron beam are horizontally arranged at equal intervals in the center of the deflection yoke 10.

When a current is applied to the deflection yoke 10, a deflection magnetic field as in <A-A 'deflection magnetic field> shown by Fleming's right screw law is generated, and according to the generated deflection magnetic field, Lower and left deflection forces are generated.

At this time, the deflection magnetic field shown on the left and right sides of the deflection yoke 10 is a horizontal deflection magnetic field (HB) that generates a left deflection force, and is formed in the shape of a failure-like pin cushion.

In addition, the deflection magnetic field shown in the upper and lower sides is a vertical deflection magnetic field (VB) for generating a lower deflection force, the shape is formed in a jar-shaped barrel shape opposite to the horizontal deflection magnetic field (HB).

However, in the case of the horizontal deflection magnetic field (HB), the middle portion indicated by the dotted line is adjacent to the electron beams B, G, and R compared to the upper and lower ends, and in the case of the vertical deflection magnetic field (VB), the both ends of the horizontal deflection magnetic field (HB) indicated by the dotted line are electron beam B , G, and R are adjacent.

Of course, the middle part of the horizontal and vertical deflection magnetic fields (HB, VB) is particularly adjacent to B and R of the electron beam, which causes B and R to be more strongly deflected to G, resulting in on-screen miss convergence as shown in FIG. Generates.

Referring to FIG. 6, this misconvergence will be described. FIG. 6 is a diagram illustrating a misconvergence pattern on a screen due to a general deflection yoke. As shown in FIG. It is divided into four quadrants, and an S point consisting of S1 to S3 indicated by a dotted line is formed in the middle portion of each quadrant.

At this time, as shown by the characteristics of the above-described horizontal and vertical deflection magnetic fields (HB, VB), that is, the more strongly deflecting the B and R of the electron beam, B and R of the electron beam miss at the point S3 which is the middle part of the screen. Landing (miss landing) will generate a mis-convergence in the form of BING.

On the other hand, the fundamental cause of misconvergence is due to the above-described deflection coils 12 and 14, which are caused by the intermediate portion 12b of the deflection coils 12 and 14, which generate a deflection magnetic field that substantially deflects the electron beam. will be.

That is, the horizontal and vertical deflection magnetic fields HB and VB shown in FIG. 5 are generated by the shape of the middle portion 12b of the deflection coils 12 and 14.

Here, the misconvergence according to the shapes of the deflection coils 12 and 14 will be described in more detail. Among the intermediate parts 12b of the deflection coils 12 and 14, the screen vent part 12b side and the neck vent part 12c are described. The deflection magnetic field of the portion adjacent to the side generates misconvergence having PQH and PQV characteristics not shown, which are generated at the corner portion on the screen.

In addition, when the middle portion 12b shown in FIG. 2 is divided into three sections, the deflection magnetic field generated at one-third of the screen portion 12b side, which is the front end side of the middle portion 12b, is shown in FIG. It generates misconvergence having S3H and S3V characteristics.

The misconvergence generated by the shapes of the deflection coils 12 and 14 is further exacerbated by the flattening and widening of the screen, and the misconvergence according to the flattening and the widening of the screen is illustrated in FIG. 7.

FIG. 7 is a conceptual diagram schematically illustrating a process of scanning an electron beam on a screen surface of a cathode ray tube, and illustrates a scanning process of an electron beam in a plan view, and as shown, electron beams B, G, and R coincide in focus F To achieve.

However, as shown by the planarization and wide-angle of the screen, both sides of the screen surface 1a are separated from the focal point F, so that the electron beams B, G, and R do not converge at one point, resulting in extreme misconvergence. Let's do it.

In the deflection yoke winding machine according to the related art as described above, the deflection coils 12 and 14 have a problem of generating extreme misconvergence at the S point, particularly the S3 point, which is the middle portion of the screen.

Of course, such misconvergence is generated by the shape of the intermediate portion 12b of the deflection coils 12 and 14, so that welding or welding is performed at the W point formed in the winding portion 24 of the female mold 20 as shown in FIG. The shape of the intermediate portion 12b of the deflection coils 12 and 14 may be modified by cutting or by varying the number of windings of the coil wound around the plurality of turning pins 23.

However, when the deflection coils 12 and 14 are formed by welding, cutting, or winding number differently, the production time increases as the number of working processes increases, and the cost of the product also increases. This process also produces a dispersion during production, there is also a problem that a bad yoke is produced.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a winding yoke for deflection yoke that can easily deform the shape in the middle of the deflection coil so as to correct misconvergence on the screen.

In order to achieve the above object, the deflection yoke winding machine according to the present invention, in the deflection yoke winding machine for winding the deflection coil of the deflection yoke,

A mold having a screen portion and a neck portion provided at front and rear ends thereof, having a semi-conical curvature between the screen portion and the neck portion, and a winding portion having a deflection magnetic field generating portion of the deflection coil;

A plurality of turning pins protruding from the screen of the mold to guide the windings of the coils to shape the deflection coils into a predetermined shape;

And a bypass pin protruding from the winding of the mold to form a slot in the middle of the deflection coil so as to correct the magnetic field in the middle of the deflection coil.

In addition, the bypass pin is characterized in that it is installed between 22 ° to 42 ° with respect to the horizontal axis of the upper end of the mold.

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

8 is a perspective view schematically showing a mold of a deflection yoke winding machine according to the present invention, and FIG. 9 is a side cross-sectional view of the mold shown in FIG. 8, wherein the deflection yoke winding machine according to the present invention has a mold described in the related art. It is composed of a female and a male as shown in FIG.

However, in the case of the male mold, the technical mold and features of the male mold according to the related art are the same, and thus only the female mold 200 is representatively illustrated in FIGS. 8 and 9 to avoid overlapping descriptions.

The mold of the winding yoke for the deflection yoke according to the present invention is composed of female and male molds having guide parts formed at both sides, and having a screen part, a winding part and a neck part formed therebetween, and a male mold not shown. The addition is formed in a positive shape formed convexly.

In addition, the female mold 400 coupled to the male mold is formed in a negative shape so that the winding part 240 is easily coupled to the male mold.

Of course, the female mold 400 is the same as the male mold screen portion 220 is located on the front, the neck portion 250 is located on the back, the winding portion 240 is located therebetween.

At this time, the screen portion 200 is formed with a plurality of turning pins 300 to guide the winding of the coil, the winding portion 240 is formed with at least one bypass pin 400 which is the most characteristic of the present invention. .

On the other hand, on the drawing, but configured as two bypass pins 400, which is only one embodiment, it is obvious that more than two may be possible in some cases.

Here, the bypass pin 400, which is the biggest feature of the present invention, will be described in more detail. The bypass pin 400 is a coil derived from the turning pin 300 without going straight to the neck portion 250 and winding. It is formed to protrude in the vertical direction on the upper surface of the winding part 240 to be bypassed by the bypass pin 400 and wound.

That is, the coil is not wound around the portion where the bypass pin 400 is installed, the coil is wound around the bypass pin 400, and the bypass pin 400 is formed longer than the coil thickness to prevent the winding of the coil.

Of course, one end of the bypass pin 400 may be connected to an actuator (not shown) to freely adjust the length of the bypass pin 400 according to the thickness of the coil. In this case, the bypass pin 400 may be It is telescoped by the operation of the actuator to adjust its length.

Preferably, an actuator is installed in the female mold 200, and one end of the bypass pin 400 is integrally connected to the actuator to operate.

Subsequently, the bypass pin 400 is vertically installed with respect to the upper surface of the winding part 240 as shown, so that the Z-axis and the bypass pin 400 of the winding part 240 are 90 °. It forms a right angle (θ).

In addition, the bypass pin 400 is installed between 22 ° and 42 ° based on the upper horizontal axis H of the female mold 200, and preferably, an interface between the screen part 220 and the winding part 240 ( L) is installed at a distance d within 3mm to 15mm.

Such a distance (d) corresponds to a third section formed on the screen unit 220 side when the winding unit 240 is divided into three portions, as shown in FIG. 9, and thus the front end of the winding unit 240. The reason for installing the bypass pin 400 in the side 1/3 section is to deform the shape of the tip 1/3 of the tip side of the deflection coil to be described later.

On the other hand, since the bypass pin 400 is installed between 22 ° to 42 ° with respect to the upper horizontal axis (H) of the female mold 200, the installation angle of the turning pin 300 is changed unlike before.

That is, the installation angle of the turning pin 300 is changed so that the angles of the turning pin 300 and the bypass pin 400 do not overlap.

Herein, the installation angles of the turning pin 300 and the bypass pin 400 will be described. As shown in the drawing, the bypass pin 400 is composed of two parts, which is exactly 24 ° based on the horizontal axis (H). It is installed at 38 ° each.

And, the plurality of turning pins 300 are installed to the bottom based on the upper end of the female mold 200, is installed symmetrically based on the middle portion of the female mold 200, of the female mold 200 The turning pin 300 formed on the left portion includes first to fifth turning pins 321, 322, 323, 324, and 325 sequentially installed from the upper end to the lower end of the female mold 200.

At this time, the first to fifth turning pins (321, 322, 323, 324, 325) is installed between 8 ° to 50 ° based on the horizontal axis (H) of the female mold 200, exactly 8 °, 19 The first to fifth turning pins 321, 322, 323, 324, and 325 are installed at °, 32 °, 44 °, and 50 °, respectively.

Of course, the turning pin 300 on the right side is installed at the same angle so as to be symmetrical to the left side, and the installation angles of the bypass pin 400 and the turning pin 300 are different from each other by the installation angle of the turning pin 300. do.

Here, comparing the installation angle of the turning pin 300 according to the present invention and the installation angle of the conventional turning pin 23 shown in Figure 4, turning pin 300 according to the present invention is the third and fourth It can be seen that the installation angles of the turning pins 323 and 324 have changed from the past.

That is, it can be seen that the installation angle of the third turning pin 323 is changed from 28 ° to 32 °, and the installation angle of the fourth turning pin 324 is changed from 42 ° to 44 °.

On the other hand, the drawing shown only the turning pin 300 and the bypass pin 400 is installed in the female mold 200 according to the present invention, unlike the female mold 200 is not shown, unlike the male shown It is obvious that the mold can be installed.

That is, the turning pin 300 may be installed on the screen part of the male mold, and the bypass pin 400 may be installed on the winding part having a spherical surface protruding in a semi-conical shape. The same can be applied.

In other words, the features of the present invention may optionally be used in any one of the female mold 200 and the male mold in some cases.

Here, the horizontal and vertical deflection coils manufactured by the deflection yoke winding machine of the present invention as described above with reference to Figure 10, Figure 10 is a plan view showing a deflection coil formed by the deflection yoke winding machine of the present invention. to be.

Of course, the deflection coil 120 illustrated is a vent type in which the neck vent part 120c is formed in an outward flange shape, but unlike the ventilator, a deflection of a ventless type in which no vent is formed is shown. Obviously, the present invention can also be applied to the coil 120.

As shown, the deflection coil 120 manufactured in the deflection yoke winding machine according to the present invention has the screen vent part 120a and the neck vent part which are not significantly related to the deflection of the electron beam at the front and rear ends as before. 120c is formed, and an intermediate portion 120b for substantially deflecting the electron beam is formed therebetween.

At this time, unlike the conventional deflection coil in the third section of the middle portion (120b) divided into three, the slot by the bypass pin 400 of the female mold 200 described above (slot: 122) Is formed.

The coil 122 is wound around the slot 122 by the slot 122, and the coil is wound around the slot 122 according to a program of a controller, not shown, for controlling the winding machine. You can have a different dose.

In more detail, the winding machine control device may be programmed so that the coil is wound more in front of or behind the slot 122, that is, the screen vent part 120a side or the neck vent part 120c side.

If the front winding amount of the slot 122 is increased, the deflection magnetic field of the deflection coil 120 may be strengthened as described in FIG. 11 to be described later, and when the rear winding amount is increased, the deflection magnetic field may be weakened. Can be.

That is, the winding amount of the deflection coil 120 can be easily adjusted based on the slot 122, and thus the magnetic force of the deflection magnetic field generated in the deflection coil 120 can be easily adjusted.

In particular, when the slot 122 is formed in a third section of the middle portion 120b, a deflection magnetic field as shown in FIG. 11 is generated to correct the misconvergence generated in the middle portion of the screen, which has been a conventional problem. Can be.

Here, the deflection magnetic field will be described with reference to FIG. 11. FIG. 11 is a view showing a deflection magnetic field of a deflection yoke employing the deflection coil shown in FIG. 10, and a solid line shows a deflection magnetic field of a conventional deflection yoke. It is shown, and the dotted line shows the deflection magnetic field according to the present invention.

As shown, a pincushion-like horizontal deflection magnetic field (HB) and a barrel-shaped vertical deflection magnetic field (VB) are generated inside the deflection yoke 10, as described above. When the coil amount is increased or decreased, the corrected horizontal and vertical deflection magnetic fields HB and VB are generated as shown in the dotted line.

That is, in the case of the horizontal deflection magnetic field (HB), when the amount of coil is increased in front of the slot 122, an extreme pincushion magnetic field indicated by a dotted line in the outward direction of the deflection yoke 10 is generated, and the amount of coil toward the rear of the slot 122 is generated. Increasing to generate a gentle pincushion magnetic field indicated by a dotted line in the inner direction of the deflection yoke (10).

In the case of the vertical deflection magnetic field (VB), increasing the amount of coil in the front of the slot 122 generates an extreme barrel magnetic field indicated by a dotted line on the inside of the deflection yoke 10, and increasing the amount of coil in the rear causes the deflection in reverse. A gentle barrel magnetic field indicated on the outside of the yoke 140 is generated.

Of course, such a horizontal deflection magnetic field (HB) is corrected by a horizontal deflection coil having a slot 122, the vertical deflection magnetic field (VB) is corrected by a vertical deflection coil having a slot (122).

On the other hand, such a slot 122 may be formed not only in the third section of the middle portion (120b) of the deflection coil 120, but also in other sections as necessary, in this case, the bypass pin of the female mold 200 It is sufficient to install the position 400 in a suitable section.

Here, the result of the misconvergence corrected by the deflection yoke winding machine according to the present invention is shown in FIG. 12, and FIG. 12 is experimental data and graphs showing the misconvergence correction state by the deflection yoke shown in FIG. The unit is mm corresponding to the mislanding distance of the G component among the electron beams B, G, and R.

As shown, the deflection yoke to which the deflection coil according to the present invention is applied has a value close to "0" compared to the conventional one before application, and "0" corresponds to one point of B, G, and R of the electron beam. In other words, it is the value when misconvergence is completely corrected.

However, due to the characteristics of the deflection field and the planarized and wide angled cathode ray tube, it is virtually impossible to set the value to "0" with the current technology.

Therefore, according to the present invention, the numerical value of the misconvergence can be as close to "0" as possible, which makes it possible to correct the misconvergence to almost zero.

In more detail, in the S2V characteristics of the table shown previously, but the numerical value of 0.05, but in the present invention the value of -0.02, the numerical difference between the previous and the present invention according to this value is 0.07.

Of course, since the numerical value of the present invention is -0.02, it can be seen that it is significantly closer to "0" than before, which can be said to correct the misconvergence.

In particular, the PQV, BING, and DHCR characteristics show that the value is very close to "0" compared to the past, and the PQV, BING, and DHCR characteristics are greatly corrected.

Therefore, according to the present invention, not only the misconvergence of the middle part on the screen which is a conventional problem but also the misconvergence of the corner part on the screen can be corrected.

As described above, the deflection yoke winding machine according to the present invention can freely deform the shape of the middle portion 120b which is a magnetic field generating portion that substantially deflects the electron beam in the deflection coil 120, so that the winding portion for the deflection yoke is generated in the middle portion 120b. Since the deflected magnetic field can be easily adjusted, mis-landing of the electron beam can be prevented.

In addition, mis-landing can be prevented to correct misconvergence and can appropriately cope with wide-angle and flattening of the cathode ray tube.

The above embodiment is merely a description of the 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.

Therefore, the shape and structure of each component shown in the embodiment of the present invention can be carried out by modifying, it is natural that the modification of the shape and structure belong to the appended claims of the present invention.

As described above, according to the deflection yoke winding machine according to the present invention, the shape of the deflection coil can be shaped to correct misconvergence through a bypass pin provided in the winding part of the mold, thereby easily changing the deflection magnetic field of the deflection coil. Due to this, there is an effect of correcting the misconvergence of the middle part and the corner part of the screen.

In addition, there is an effect that can produce a deflection yoke that can cope with the planarization and wide angle of the cathode ray tube.

In addition, unlike the conventional method, since it is not necessary to perform welding or cutting to deform the shape of the deflection coil, the number of working steps can be reduced, thereby reducing the time required for production of the product and the cost of production. It can also reduce the effect of producing a deflection yoke of good quality.

1 is a side cross-sectional view of a general deflection yoke.

2 is a plan view showing a deflection coil of the deflection yoke shown in FIG. 1;

Figure 3 is a perspective view of a winding machine for deflection yoke according to the prior art.

4 is a perspective view schematically showing the mold shown in FIG.

Figure 4 is a plan view showing a deflection coil formed by the deflection yoke winding machine of the prior art.

5 is a cross-sectional view taken along line AA ′ of the deflection yoke and a deflection magnetic field diagram of FIG.

6 is a diagram illustrating a misconvergence pattern on a screen due to a general deflection yoke.

7 is a conceptual diagram schematically illustrating a process in which an electron beam is scanned on a screen surface of a cathode ray tube.

Figure 8 is a perspective view schematically showing a mold of the winding machine for deflection yoke according to the present invention.

9 is a side cross-sectional view of the mold shown in FIG. 8.

10 is a plan view showing a deflection coil formed by the deflection yoke winding machine of the present invention.

FIG. 11 shows a deflection magnetic field of a deflection yoke employing the deflection coil shown in FIG. 10; FIG.

FIG. 12 is experimental data and a graph showing a misconvergence correction state due to the deflection yoke shown in FIG.

<Description of Signs of Major Parts of Drawings>

120: deflection coil 122: slot

200: female mold 220: screen portion

240: winding portion 250: neck portion

300: turning pin 400: bypass pin

Claims (2)

In the winding machine for the deflection yoke for winding the deflection coil of the deflection yoke, A mold having a screen portion and a neck portion provided at a front side and a rear end side thereof, and a semi-conical winding portion configured to form a deflection magnetic field generating portion of the deflection coil between the screen portion and the neck portion; A plurality of turning pins protruding from the screen portion of the mold to guide the windings of the coils so that the deflection coils are shaped into a predetermined shape; By forming a slot in the middle of the deflection coil so as to protrude from the winding portion of the mold to correct the magnetic field of the middle portion of the deflection coil is installed between 22 ° ~ 42 ° relative to the horizontal axis of the upper end of the mold Pass pins; Winding machine for the deflection yoke comprising a. delete