JP2000340133A - Deflection yoke device - Google Patents

Abstract

(57) [Problem] To provide a deflection yoke device which does not cause a decrease in sensitivity or an increase in a leakage magnetic field due to an increase in an ineffective inductance and does not cause mechanical stress. A core 33 has a shape gradually expanding from a neck side toward a screen side, a bobbin provided along an inner surface or an outer surface of the core 33, and a guide hook and a neck side base provided at a screen side base. In the deflection yoke device provided with a bobbin for forming a deflection coil by winding an electric wire with a guide hook provided in a sub-coil 34A and a main coil 34B, As the winding path, a first winding path formed between the screen side base and its guide hook, and between the neck side base and its guide hook, respectively, the screen side base and its inside, and the neck A side base portion and a second winding path provided inside each of the side base portions along the respective base portions are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke device used by being mounted on a cathode ray tube of a television receiver, a display device or the like.

[0002]

2. Description of the Related Art Generally, a deflection yoke device comprises a horizontal deflection coil and a vertical deflection coil. Deflection coils are classified into saddle-shaped coils wound in a toroidal shape and toroidal coils wound in a toroidal shape depending on the winding method. A device using a saddle-type coil for each of the horizontal deflection coil and the vertical deflection coil is called a saddle-saddle-type deflection yoke device.

FIGS. 8 and 9 show an example of a conventional deflection yoke device in which a vertical deflection coil is wound in a saddle shape. However, the horizontal deflection coil is omitted. FIG. 8 is a view from the front side (screen side), and FIG. 9 is a view from the back side (neck side). Here, a split type deflection yoke device divided into two parts, a ferrite core and a bobbin, will be described.

In these figures, a deflection yoke device 30 is used.
Has an inner bobbin 31 and an outer bobbin 32 serving as a holder for holding the vertical deflection coil and the ferrite core. A ferrite core 33 is provided between the inner bobbin 31 and the outer bobbin 32. The screen side of the ferrite core 33 is formed of ferrite of a magnetic material in an expanded shape. The bobbins 31, 32, the ferrite core 33 and the deflection coil 34 are AA shown in FIG.
It is composed of a half part divided into two parts, a part and a BB part,
Moreover, the two halves are united at the center using a spring member 35 (see FIG. 9), and are configured in a trumpet shape as a whole.

More specifically, two halves (A-A and B-
B) is a substantially U-shaped spring member 35 as shown in FIG.
Are fitted into recesses 33a, 33a formed in the two ferrite cores 33, 33, respectively.
They are joined together.

The inner and outer bobbins 31, 32 are formed of a non-magnetic material such as polypropylene resin, and the front side (screen side) is formed in an expanded shape. The neck portion of the cathode ray tube is inserted into the inner bobbin 31. It is supposed to be. A pair of vertical deflection coils 34, 34 wound to generate a magnetic field in the vertical direction along the grooves between the plurality of guides 311 are provided on the inner surface sides of the pair of inner bobbins 31, respectively.
Are arranged.

On the outer surface of each inner bobbin 31 is disposed a ferrite core 33 having a shape obtained by dividing a substantially hollow rotor into two parts.
It is configured to be suppressed by. The inner bobbin 31 and the outer bobbin 32 have a structure in which both are closely fixed by annular screen-side bases (31a, 32a) and neck-side bases (31b, 32b) provided at both ends thereof. A ferrite core 33 is sandwiched and held between the outer bobbin 31 and the outer bobbin 32 (see FIGS. 10B and 10C). FIG. 10 (a) is a view of the half inner bobbin 31 viewed from the joint surface side.
FIG. 10B is a side sectional view illustrating how to assemble the inner bobbin 31, the ferrite core 33, and the outer bobbin 32, and FIG. 10C shows the assembled state. Note that reference numeral 3
A portion indicated by reference numeral 12 is a reinforcing bridge for connecting the plurality of guides 311 formed on the bobbin 31 and fixing a mutual interval between the plurality of guides 311.

On the inner bobbin 31, a plurality of guides 311 are formed in a support frame shape so that a plurality of slits are formed by being connected between the bases 31a and 31b on the screen side and the neck side. Further, a plurality of guide hooks 311a and 311b (see FIG. 8 (b)) extending in both ends of the plurality of guides 311 and having an L-shaped cross section (or an inverted L-shape) extend over the bases 31a and 31b. Bases 31a, 31
It is formed so as to be parallel to b.

A plurality of guides along the plurality of slits formed between the plurality of guides 311 connecting the screen side base 311a and the neck side base 311b and having the aforementioned L-shaped (or inverted L-shaped) cross section. Hooks 311a, 3
An electric wire 34 as a vertical deflection coil is wound along the inner surface of the inner bobbin 31 so as to reciprocate between 11b. The winding method is as shown in FIG.
Guided by multiple slits between 1 → 2 → 3 → 4 → 5
→ 6 → 7 → 8 → 9 ... However, 2 →
3 → 4, 5 → 6 → 7 → 8, 9 → 10 → 11 → 12, ...
Are wound a plurality of times so as to go to the next slit.

As a method of providing a slit inside a ferrite core, there is the following method.

FIGS. 10A to 10C show a plurality of slit guides 31 with respect to a ferrite core 33 having a normal shape.
The inner bobbin 31 on which the outer bobbin 3 is formed is mounted.
2 indicates a type in which the core 33 is sandwiched like a sandwich. As a method of disposing the bobbins on both sides of the ferrite core 33 as described above, the inner and outer bobbins are integrally formed on the outer surface of the core 33 by resin molding or the like so as to surround both sides of the ferrite core 33 as shown in FIG. Some types are considered.

On the other hand, FIGS. 12 and 13 show another conventional example of a means for providing a slit inside a ferrite core. FIG. 12 is a perspective view showing an assembled state, and FIG.
FIG. 2 is a sectional view taken along line BB of FIG.

In these figures, the inner bobbin is eliminated, and the ferrite core 41 and the outer bobbin 42 are provided. A plurality of grooves 41a that perform a slit function are machined directly on the inside of the ferrite core 41. On the outer surface side of the core 41, similarly to the guide hooks at the time of deflecting coil winding shown in FIGS. Outer bobbin 4 provided with a plurality of guide hooks 421a and 421b on the screen side and the neck side
2 is attached. Reference numerals 42a and 42b denote screen-side and neck-side base portions of the outer bobbin 42, respectively. A plurality of support portions 421 are provided between the base portions 42a and 42b.
And a plurality of guide hooks 421a, 421b
Are connected to the respective bases 42a and 42b and provided outside thereof so as to be substantially parallel to the respective base surfaces.

As described above, the method of attaching the bobbin having the slit guide to the ferrite core, the method of integrally forming such a bobbin with the ferrite core, or the method of directly forming the bobbin on the inner surface of the ferrite core In any of the methods of forming the slit, if the winding method is a simple repetition of winding as shown in FIG. 11 (referred to as single winding), the cross-sectional view is shown in FIG. It will be something like FIG. 14A shows FIGS.
FIG. 11 shows a sectional view on the neck side in the type of slit guide formation shown in FIG. 10.

By the way, in recent years, there has been a tendency that the vertical deflection coil is divided into a sub coil 34A and a main coil 34B as shown in FIG. In such a case, a double winding as shown in FIG.

In the case of double winding, the sub coil 34A is wound first, as shown in FIG.
4B is wound as shown in FIG. 14 (b). Therefore, the base 3 of the bobbin 31 in the double winding state shown in FIG.
The winding diameter φB of 1b is φB> φA with respect to the winding diameter φA of the base 31b in the single winding of FIG. As a result, the size of the base winding that is ineffective for deflection increases in size, thereby increasing the ineffective inductance, causing a decrease in sensitivity and an increase in the leakage magnetic field. Although FIGS. 14A and 14B show only the cross-sectional view on the neck side, the same applies to the screen side.

Further, as shown in FIG. 17, the main coil 34B straddles the sub-coil 34A by double winding, and a part of the coil becomes a guide hook 311b on the base side.
The protrusions may protrude further outward, or stress may easily be applied to the guide hooks 311b in the direction of the arrow, causing deformation, thereby hindering the mounting of the vertical deflection coil.

[0018]

As described above, in the conventional winding structure of the deflection yoke device, when a double winding is implemented, the sensitivity is reduced due to an increase in an ineffective inductance and a leakage magnetic field is increased. was there. In addition, there is a problem that mechanical stress also increases.

Accordingly, the present invention has been made in view of the above problems, and has as its object to provide a deflection yoke device which does not cause a decrease in sensitivity or an increase in leakage magnetic field due to an increase in an ineffective inductance and does not cause mechanical stress. Is what you do.

[0020]

According to the first aspect of the present invention,
A core having a shape gradually expanding from the neck side toward the screen side, and a bobbin provided along an inner surface or an outer surface or the entire circumference of the core, provided with a guide hook provided on the screen side base and a neck side base. In a deflection yoke device including a bobbin for forming a deflection coil by winding an electric wire between the guide hook and a guide hook, the deflection coil is divided into a sub coil and a main coil, and the winding path is used when performing double winding. Two winding paths are formed in the vicinity of each base for each base on the screen side and the neck side.

According to the first aspect of the present invention, the structure near the base on the screen side and the neck side of the bobbin is double-structured for double winding of the sub-coil and the main coil, so that the sub-coil and the main coil are formed. Make the winding path near the base independent. As a result, the winding shape near the bobbin base of the main coil is minimized, preventing a decrease in sensitivity and an increase in the leakage magnetic field due to an increase in the invalid inductance, thereby producing an effect of increasing the sensitivity and decreasing the leakage magnetic field, and Stress can also be reduced.

According to a second aspect of the present invention, in the deflection yoke device according to the first aspect, the two winding paths are respectively provided between the screen-side base and its guide hook and between the neck-side base and its guide hook. A first winding path to be formed, the screen-side base and the inside thereof,
And a second winding path provided along each of the bases on the neck side and inside thereof, respectively.

According to a third aspect of the present invention, in the deflection yoke device according to the second aspect, the second winding path includes at least two cut portions provided at each of the bases on the screen side and the neck side, respectively. An annular rib is provided so as to face each of the guide hooks across the bases on the screen side and the neck side.

[0024]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a deflection yoke device according to one embodiment of the present invention. 1, (a) is a perspective view showing a half of an inner bobbin, (b) is a perspective view showing a half of a ferrite core, and (c) is a perspective view showing a half of an outer bobbin. The same parts as those in FIG. 10 are described with the same reference numerals.

The inner bobbin 31 shown in FIG. 1A is made of a non-magnetic material such as a polypropylene resin, and is configured as a pair of two halves. Here, only one half is shown. The other half (not shown) has a similar shape, and the two halves are joined together with the support frames 313 and 313 as joints, so that the entire inner bobbin has a trumpet shape. ing.

In FIG. 1A, a half inner bobbin 31 is shown.
Has a semicircular annular screen side base 31a and a semicircular annular neck side base 31b with a smaller diameter, and connects between the bases 31a and 31b.
A plurality of guides 311 are formed. Of the plurality of guides 311, only one central guide is formed wide,
On the other hand, the other guides (eight in the figure) are formed in the same shape with a narrow width. Multiple guides 31
Each of the guides 1 has a shape gradually expanding from the neck side to the screen side, and the bobbin 31 forms a trumpet-shaped half as a whole. The screen side end of the guide 311 extends to the screen side beyond the screen side base 31a, and forms a screen side guide hook 311a for hooking a wire for a deflection coil. The neck-side end of the guide 311 extends to the neck side beyond the neck-side base 31b to form a neck-side guide hook 311b for hooking a wire for a deflection coil.

On one surface (shown surface) of the screen side base 31a, an engagement projection 314 is formed to engage with the engagement groove 33b of the ferrite core 33 shown in FIG. 1 (b). One surface of the side base 31b (the base 3 shown
1b), the engaging groove 33b of the ferrite core 33 is provided.
An engagement protrusion (not shown) is formed to engage with the projection.

Engaging portions 315 and 315 for attaching the outer bobbin 32 shown in FIG. 1 (c) are provided on one surface (the surface in the drawing) of the screen side base 31a at both ends of the base 31a in a tunnel-shaped frame. A central portion 320 of the outer periphery of the neck-side base portion 31b is projected outward over a certain range, and is used to lock the outer bobbin 32 shown in FIG. Are formed, and both ends 318, 3 of the protruding portion 320 are formed.
18 also serves as an engaging portion for locking the outer bobbin 32.

Further, supporting frames 313 and 313 are provided to support both sides of a half formed by the screen-side base 31a, the neck-side base 31b, and the plurality of guides 311. The support frames 313 and 313 are formed in a form similar to the guides so as to form both end surfaces (joining surfaces) of the half body along with the plurality of guides 311, and the base portions 31 a and 3.
1b and the plurality of guides 311 are integrally formed.

A reinforcing bridge 312 is formed in a ring shape integrally with the plurality of guides 311 at an intermediate position of the plurality of guides 311 so as to connect the guides 311 to each other.

Further, in the present embodiment, a plurality of (seven in number in the figure, nine guide hooks 311a) cutouts 36 are formed in the screen side base 31a.
Is formed at a position adjacent to. Similarly, in the neck side base portion 31b, a plurality of cut portions 37 (the same number as the guide hooks 311b in the figure) are formed at positions adjacent to the guide hooks 311b.

The outer bobbin 32 shown in FIG.
After arranging the ferrite core 33 (see FIG. 1 (b)) so as to contact the outer surface of the inner bobbin 31 of (a), the ferrite core 33 is held down from outside and fixed to the inner bobbin 31. Things.

The outer bobbin 32 is formed by integrating a semicircular annular screen side base 32a and a semicircular annular neck base 32b having a smaller diameter with a plurality of (three in the figure) support portions 321. It is formed in a shape that is connected to each other.
Locking claws 322 and 322 are integrally formed at both circumferential ends of the screen side base 32a so as to protrude, and a screen side base of the inner bobbin 31 is formed on an outer periphery 327 of the screen side base 32a. Outer peripheral part 31 of 31a
9 (refer to FIG. 1 (a)).
3, 323 are formed at appropriate intervals. The locking claws 322 and 322 are engaged with the engaging portions 31 of the inner bobbin 31.
5,315. Similarly, the neck side base 3
Locking claws 3 protrude from both circumferential ends of 2b.
24 and 324 are integrally formed, and a certain range of the central portion of the outer periphery of the neck side base 32b is formed in a shape protruding outward so as to match the shape of the neck side base 31b of the inner bobbin 31 in FIG. In the central portion 328 of the protruding portion, a T which can be engaged with the engagement notch 316 (see FIG. 1A).
And a projecting portion 32
The two engaging hooks 326 and 326 capable of engaging with the engaging portions 318 and 318 (see FIG. 1A) are formed at both ends of the hook 8. The locking claws 324 and 324 can be engaged with an engaging portion (having the same shape as the reference numeral 315 but not shown) provided on the illustrated lower surface of the neck side base 31b of the inner bobbin 31.

In the present embodiment, the annular rib 321a is attached to the support portion 3 so as to face the screen side base portion 32a and to be separated from the base portion 32a by a predetermined distance.
21 fixedly provided. Similarly, the annular rib 321b is opposed to the neck-side base portion 32b and is separated from the base portion 32b by a predetermined distance.
Is fixedly provided.

Further, on the screen side base portion 32a, a plurality of (nine in the figure) cut portions 38 are provided at positions corresponding to the cut portions 36 in FIG. 1A (in other words, with respect to the inner bobbin 31). The cut portion 38 is formed at a position where the cut portion 38 overlaps the cut portion 36 when the outer bobbin 32 is mounted.
Similarly, the neck side base portion 32b has a plurality (9 in the figure).
1 (a) (in other words, when the outer bobbin 32 is attached to the inner bobbin 31, the notch 38
6).

The ferrite core 33 shown in FIG. 1B has an engagement groove 33b formed on the screen side end face of the inner bobbin 31 for engaging with the engagement projection 314 of the screen side base 31a. Is formed with an engagement groove 33b that engages with the engagement protrusion (not shown) of the neck-side base 31b of the inner bobbin 31. On the outer surface of the ferrite core 33, the halves are connected by spring members (reference numeral 3 in FIG. 9).
Recesses 33a, 33a for coupling in 5) are formed near both ends in the circumferential direction. In the inner surface of the ferrite core 33, when the ferrite core 33 is disposed on the outer surface of the inner bobbin 31, a concave portion (not shown) that fits with the ring-shaped bridge 312 on the outer surface of the inner bobbin 31. Are formed in a ring shape.

In the above configuration, the inner bobbin 3
To assemble each half of the ferrite core 33 and the outer bobbin 32, as shown in FIG.
FIG. 1A shows the outer surface of the half inner bobbin 31 shown in FIG.
The ferrite core 33 shown in (b) is fitted and arranged, and (2) the outer claw 322 of the outer bobbin 32 is further overlapped with the outer bobbin 32 of FIG. , 322 and the engaging claws 324, 324 are engaged with engaging portions 315, 315 of the inner bobbin 31 and an engaging portion (not shown) of the neck side base, respectively, to be engaged and fixed. FIG. 2 (c) shows the assembled state.

A further explanation will be given with reference to FIG. In FIG. 2, (a) is a view of the half inner bobbin 31 as viewed from the joining surface side (inner surface side), and (b) explains how to assemble the inner bobbin 31, the ferrite core 33, and the outer bobbin 32. It is side sectional drawing, (c) has shown the assembled state.

On the outer surface side of the inner bobbin 31 shown in FIG. 2A, a ferrite core 33 in a shape obtained by dividing a substantially hollow rotary body into two parts is closely contacted as shown in FIGS. 2B and 2C. Arranged,
Further, the outer side of the ferrite core 33 is
It is configured to be suppressed by 2. The inner bobbin 31 and the outer bobbin 32 are closely fixed to each other by annular screen-side bases (31a, 32a) and neck-side bases (31b, 32b) provided at both ends thereof, respectively. The ferrite core 32 is sandwiched and held between the ferrite core 32.

As shown in FIG. 2 (a), the inner bobbin 31 has a plurality of guides 311 connected between the screen-side and neck-side bases 31a and 31b in the form of a support frame. A plurality of guide hooks 311a and 311b (see FIG. 2 (b)) extending in both ends of the plurality of guides 311 and having an L-shaped (or inverted L-shaped) cross section are provided on the base 31.
The bases 31a and 31b are formed so as to extend in parallel with the bases 31a and 31b beyond the bases 31a and 31b.

As shown in FIG. 2 (b), the outer bobbin 32 is provided on a support portion connecting the bases 32a and 32b on the screen side and the neck side and at a fixed distance from the bases 32a and 32b. Annular ribs 321 a and 321 b for forming a winding path for the sub coil are formed integrally with the bobbin 32.

FIG. 3 shows the vicinity of the base on the neck side when the vertical deflection coil is wound in the assembled state of FIG. 2C. The same applies to the vicinity of the screen side base not shown. FIG. 4 is a sectional view taken along line AA of FIG.

In FIG. 3, a plurality of cuts 37 are provided at intervals on the neck side base 31b of the inner bobbin 31. Further, the neck side base portion 32b and the rib portion 321b of the outer bobbin 32 are not shown in FIG. 3, but the outer bobbin 32 also has a cut portion 39 (which corresponds to the cut portion 37 of the inner bobbin 31). (Which overlaps with the notch 37). The notch 37
At a position adjacent to the guide hook 311b, it is provided with a width that allows a required number of windings (see the description of FIG. 11). As shown in FIG. 4, a winding path for a sub coil is formed between a base 32b of the outer bobbin 32 and an annular rib 321b provided to face the base.

FIG. 3 shows a state in which the inner bobbin 31 having a plurality of slit guides 311 is mounted on the normal-shaped ferrite core 33, and the core 33 is sandwiched between the outer bobbins 32 like a sandwich. 2 (c)) shows a state in which the sub coil 34A is wound. Although the winding of the main coil 34B is omitted in FIG. 3, the sub coil 3B
After winding 4A, the main coil 34B is wound as shown in FIGS. 8 and 9 by using an appropriate guide hook 311b.

First, the winding of the sub coil 34 is performed.
When winding from the neck base 31b to the screen base 31a inside the inner bobbin 31 as shown in FIG. 11, the coil 34A reaching the neck base 31b (same for the screen base 31a) is connected to the guide hook 311b. Formed by the annular rib 321b provided on the outer bobbin 32 via a cut 37 on the base 31b of the inner bobbin and a cut 39 on the base 32b of the outer bobbin along one and adjacent to its guide hook 311b. Through the sub coil winding path. That is, the base 31b of the inner bobbin and the base 32 of the outer bobbin not shown
b, it appears again on the front side of the drawing through another cut portion 39 and cut portion 37, and is wound around a slit formed inside the inner bobbin 31. After repeating this operation and completing the winding, the winding of the main coil 34B is performed. The winding of the main coil 34B is formed by the neck base 31b.
Near the inner bobbin 31 as shown in FIG.
Through the winding path formed between the base 31b and the guide hook 311b.

When the deflection coil is divided into the sub-coil 34A and the main coil 34B to perform double winding, the winding path has first and second winding paths.
The screen side base 31a and its guide hook 31
The winding paths formed between 1a and between the neck-side base 31b and its guide hook 311b constitute a first winding path. The screen side base 31a
And the notches 36, 38 and the annular rib 32 therein.
1a, and the winding path provided along the bases 31a, 31b by the cutouts 37, 39 and the annular rib 321b in the neck side base 31b and the inside thereof, respectively, is the second winding path. Make up.

As a result, the winding state of the sub-coil 34A and the main coil 34B at the neck-side base (same for the screen-side base) is independent as shown in FIG. The winding shape should be minimized (about φA). Instead, the winding shape of the sub-coil 34A at the neck-side base (the same applies to the screen-side base) increases, but most of the winding path for the sub-coil is independent of the winding path for the main coil. Therefore, when comparing the turns ratio with the main coil 34B,
It can be said that the degree of influence is small.

FIG. 5 is a perspective view showing a deflection yoke device according to another embodiment of the present invention, and FIG. 6 is a sectional view taken along line BB of FIG. This embodiment is directed to the conventional example shown in FIG.

In FIG. 5, the inner bobbin is eliminated, and is constituted by a ferrite core 41 and an outer bobbin 42.
A plurality of grooves 41a that perform a slit function are formed directly inside the ferrite core 41. A plurality of guide hooks 4 are provided on the outer side of the core 41 on the screen side and the neck side.
An outer bobbin 42 having 21a and 421b is mounted. Reference numerals 42a and 42b denote screen-side and neck-side bases of the outer bobbin 42, respectively. The bases 42a and 42b are connected by a plurality of support portions 421.
The plurality of guide hooks 421a and 421b are
a, 42b and are provided outside thereof so as to be substantially parallel to the respective base surfaces.

In this embodiment, the base 42a faces the base 42a inside the screen side base 42a.
b at a fixed distance from the annular rib 42
2 a is provided fixed to the support portion 421. Similarly, an annular rib 422b is fixedly provided on the support portion 421 so as to face the base portion 42b inside the neck side base portion 42b and to be spaced apart from the base portion 42b by a predetermined distance.

Further, a plurality of (nine in the figure) notches 43 for passing the sub-coils are formed in the screen side base 42a. Similarly, a plurality of (nine in the figure) cutouts 44 for subcoil passage are formed in the neck side base 42b.

When the outer bobbin 42 is mounted on the outer surface of the ferrite core 41, a sectional side view thereof is as shown in FIG. Screen side base 42a and annular rib 42
2a, and the neck side base 42b and the annular rib 422.
b, a winding path for the sub-coil winding is formed. Space between the screen side base 42a and the guide hook 421a, and the neck side base 42b and the guide hook 421
The space with b is mainly used as a path for the main coil winding. When the winding of the sub coil 34A is performed, the winding is performed as shown in FIG. The state near the neck-side base (the same applies to the screen-side base) when the sub-coil 34A and the main coil 34B are wound is almost the same as that shown in FIG.

FIG. 7 is a modification of each of the above-described embodiments. In this example, the distribution in the winding state of the sub-coil 34A in the neck-side base 31b of the sub-coil 34A (the same applies to the screen-side base 31a) tends to concentrate on the slit portion closest to the X-axis and the Y-axis. Therefore, as shown in FIG. 7, the cut portion 36 may be provided only near the Y axis. Even in this case, the winding shape in the vicinity of the base of the main coil 34b is in the state shown in FIG. 4 described above, and when the double winding is implemented, a decrease in the sensitivity and an increase in the leakage magnetic field due to an increase in the invalid inductance are prevented. Thus, mechanical stress can be reduced.

In addition to the above-described embodiment, as a method of disposing bobbins on both surfaces of the ferrite core 33,
The inner and outer bobbins are formed by resin molding or the like so as to surround both sides of the ferrite core 33 as shown in FIG.
There is also a deflection yoke device of a type integrally formed on the outer surface of No. 3, but it goes without saying that such a deflection yoke device can also be provided with a winding path for a subcoil according to the present invention.

[0055]

As described above, according to the present invention, it is possible to realize a deflection yoke device which does not cause a decrease in sensitivity or an increase in a leakage magnetic field due to an increase in an ineffective inductance and does not receive any mechanical stress. It becomes possible.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a deflection yoke device according to an embodiment of the present invention.

FIG. 2 is a view of the device of FIG. 1 (before winding) mainly viewed from a joining surface side (inner surface side).

FIG. 3 is a perspective view showing the vicinity of a neck side base in a state where a vertical deflection coil is wound in the assembled state of FIG. 2 (c).

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an exploded perspective view showing a deflection yoke device according to another embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a perspective view showing a modification of the embodiment shown in FIGS. 1 and 5;

FIG. 8 is a perspective view showing an example of a conventional deflection yoke device in which a vertical deflection coil is wound in a saddle shape when viewed from a screen side.

FIG. 9 is a perspective view showing an example of a conventional deflection yoke device in which a vertical deflection coil is wound in a saddle shape when viewed from a neck side.

FIG. 10 is a view of a conventional device before winding mainly viewed from a joining surface side (inner surface side).

FIG. 11 is a diagram showing how to wind a deflection coil.

FIG. 12 is an exploded perspective view showing another conventional example.

FIG. 13 is a sectional view taken along line BB of FIG. 12;

FIG. 14 is a cross-sectional view of the vicinity of the neck-side base in the conventional single-winding and double-winding winding states of FIGS. 8 to 10;

FIG. 15 is a wiring diagram showing a configuration in which a vertical deflection coil is divided into a sub coil and a main coil.

FIG. 16 is a plan view near the base showing the winding state of the sub coil in the case of double winding.

FIG. 17 is a cross-sectional view showing a conventional problem caused by doubly winding a sub coil and a main coil.

[Explanation of symbols]

 31 ... inner bobbin 31a ... screen side base 31b ... neck side base 311a, 311b ... guide hook 32 ... outer bobbin 321a, 321b ... annular rib 32a ... screen side base 32b ... neck side base 33 ... ferrite cores 36, 37, 38, 39 ... cut part 42 ... outer bobbin 42a ... screen side base 42b ... neck side base 421a, 421b ... guide hook 422a, 422b ... annular rib 43, 44 ... cut part

Claims (3)

[Claims] 1. A core having a shape gradually expanding from a neck side toward a screen side, and a bobbin provided along an inner surface or an outer surface or the entire periphery of the core, and a guide hook and a neck provided at a screen side base. A deflection yoke device comprising a bobbin for forming a deflection coil by winding an electric wire between a guide hook provided on a side base portion, and a winding when a deflection coil is divided into a sub coil and a main coil and is double-wound. 2. The deflection yoke device according to claim 1, wherein two winding paths are formed in the vicinity of each of the bases on the screen side and the neck side as the line paths. 2. The two winding paths include a first winding path formed between the screen-side base and its guide hook, and a neck-side base and its guide hook, respectively, and the screen-side base and the first winding path. 2. The deflection yoke device according to claim 1, wherein the deflection yoke device comprises an inner portion thereof, the neck side base portion, and a second winding path provided along each base portion inside the neck side base portion. 3. The apparatus according to claim 2, wherein the second winding path includes at least two screens provided on the screen side and the neck side, respectively.
3. The deflection yoke according to claim 2, comprising: two notches; and annular ribs provided so as to face the respective guide hooks with the bases on the screen side and the neck side interposed therebetween. apparatus.