JP2002042687A - Deflection yoke device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the inner diameter of a neck from being varied by the tightly wound coil without increasing the wall thickness of or reinforcing the mold of the neck part even if a coil is wound on the neck part. SOLUTION: This flat pendant deflection yoke device comprises a core of generally hollow rotated shape gradually divergent from the neck toward the screen, a first mold 6 installed along the inner surface of the core and having the neck extending in the direction along by electron gun, and a second mold 7 engaged with the first mold. An electric wire 9 of the deflecting coil is wound on the neck 6 of the first mold, and the engaging part 6e provided in the neck 6 is fitted to the engaging part 7d of the second mold 7 to correct the variation in inner diameter by the tightly wound wire 9 at the neck 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention comprises a first mold member having a neck extending in a direction along an electron gun, and a second mold member engaged with the first mold member. By fitting the engaging portion provided on the neck portion of the mold member with the engaging portion of the second mold member, a change in the inner diameter due to tight tightening of the electric wire of the neck portion is corrected, The present invention relates to a deflection yoke device in which the inner diameter does not change due to tight tightening of an electric wire without increasing the thickness or reinforcing the neck portion of the mold member.

[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.

A deflection yoke device for a video display device using a cathode ray tube, such as a color television receiver or a color monitor, is used to reduce the power required to deflect an electron beam from the viewpoint of energy saving. There is a deflection yoke device having a coil shape that extends a side bend portion in a direction along an electron gun. FIG. 8 shows an example of a conventional deflection yoke device of a flat bend type having a coil shape extending a bend portion on a neck side in a direction along an electron gun and having a horizontal deflection coil and a vertical deflection coil wound in a saddle shape. FIG.

In the deflection yoke device 12, a vertical coil electric wire (not shown) is wound around a hook of an outer bobbin 15 having a ferrite core 13 fitted therein, and is externally inserted into the inner bobbin 16. Next, the neck base 15a of the outer bobbin 15
The plurality of engaging claws 17d of the separator neck 17 are engaged with the plurality of engaging grooves 15a-2 of the
7 is brought into contact with the end of the inner bobbin 16 on the neck side. Then, the plurality of hooks 1 of the inner bobbin 16
6a and a plurality of hook pieces 17 of the separator neck 17
When the electric wire 19 of the horizontal coil is wound around c, an assembled state as shown in FIG. 8 is obtained.

[0005]

In the deflection yoke device 12 as described above, as shown in FIG. 9A, an electric wire 19 is wound around a plurality of hook pieces 17c of a separator neck portion 17 and guided. Many fins 17c-1 are provided. Then, as shown in FIG. 9B, when the electric wire 9 is guided by the respective fins 17c-1 between the plurality of hook pieces 17c of the separator neck portion 17, and wound around the electric wire 19, the plurality of electric wires 19 are tightened. The hook piece 17c is deformed, and the hook piece 17c
In this case, the inner diameter of the boss 17b formed by the above becomes narrower toward the tip, and there is a problem that the deflection of the electron beam changes. In order to prevent this, it is necessary to increase the thickness of the plurality of hook pieces 17c of the separator neck portion 17. However, if this is done, the distance between the winding and the electron beam increases, and the power for deflecting the electron beam increases. Will increase.

It is also conceivable to provide reinforcing projections to reinforce the plurality of hook pieces 17c of the separator neck portion 17. In this case, however, there is a problem that the projections hinder the freedom of winding. there were.

Accordingly, the present invention provides a deflection yoke device which is configured such that even if a winding is wound around a neck portion, the inner diameter does not change due to tight tightening without making the mold member of the neck portion thick or reinforcing. It is intended to provide.

[0008]

A deflection yoke device according to the present invention is a flat bend type deflection yoke device, and comprises a core having a substantially hollow rotating body shape gradually expanding from a neck side toward a screen side. A first mold member provided along an inner surface of the core and having a neck extending in a direction along the electron gun; and a second mold member engaged with the first mold member. The electric wire of the deflection coil is wound around the neck portion of the mold member, and the engaging portion provided on the neck portion is fitted to the engaging portion of the second mold member, thereby winding the electric wire around the neck portion. It is characterized in that a change in inner diameter due to tightness is corrected.

In the deflection yoke device according to the present invention, the engaging portion provided on the neck portion of the first mold member and the engaging portion of the second mold member are fitted to each other, so that the first mold member can be fixed. Changes in the inner diameter due to tight tightening of the electric wire at the neck are corrected. As a result, the dimensions after the correction can be kept constant, so that the accuracy is improved, and it is not necessary to thicken or reinforce the mold member of the neck portion, so that the distance between the winding and the electron beam can be prevented from increasing, and the deflection can be prevented. It is possible to avoid an increase in power to be applied.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a deflection yoke device according to the present invention will be described below with reference to the drawings. Figure 1
1 is an exploded perspective view of a flat bend type deflection yoke device according to the present invention. Here, a state where the electric wire is not wound is shown.

The deflection yoke device 1 is attached to an inner bobbin 2 for holding a horizontal deflection coil, an outer bobbin 5 for holding a vertical deflection coil and a ferrite core 3, and an end of the outer bobbin 5. It is roughly composed of a separator neck portion 6 which is a neck portion of the first mold member connected to the portion 2b, and a rear cover 7 which is a second mold member that covers the separator neck portion 6.

According to the present invention, even when a wire is wound around the separator neck 6, the engaging projection 6e, which is the engaging portion of the separator neck 6, and the engaging hole 7d, which is the engaging portion of the rear cover 7, are fitted. By doing so, it is possible to correct that the inner diameter of the boss portion 6b of the separator neck portion 6 is reduced due to the tight tightening of the electric wire.

In general, a deflection coil used in a cathode ray tube of a video display device such as a color television receiver or a color monitor depends on the winding method, and a saddle-shaped coil wound in a circular shape and a toroidal coil wound in a toroidal shape. There is a coil. 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.

The inner bobbin 2, the outer bobbin 5, and the separator neck 6 are made of a non-magnetic material such as a polypropylene resin. The screen sides of the inner bobbin 2 and the outer bobbin 5 are formed in an expanded shape, and a neck portion of a cathode ray tube (CRT) is inserted into the inner bobbin 2.

The inner bobbin 2 is provided with an annular screen-side base 2a and an annular neck-side end 2b having a smaller diameter. A side surface L for hooking a deflection coil, here a horizontal coil wire, is attached to the screen side base 2a.
A plurality of hooks 2a-1 in the shape of a letter are formed. A plurality of ribs 2b-1 for guiding electric wires are formed inside the neck side end 2b.

A ferrite core 3 is arranged between the inner bobbin 2 and the outer bobbin 5. The ferrite core 3 is made of magnetic ferrite, and the screen side is formed in an expanded shape.

The outer bobbin 5 is provided with an annular screen-side base 5a and an annular neck-side base 5b having a smaller diameter than the annular base 5a. Each of the annular bases 5a and 5b has a deflection coil, here an electric wire of a vertical coil. Side L for hooking
(Or inverted L-shaped) hooks 5a-1,.
5b-1,... Are formed. A plurality of openings 5c are formed in the tapered side surface of the outer bobbin 5, and the ferrite core 3 is fitted inside the outer bobbin 5, and in this state, an electric wire of a vertical coil is inserted between the hooks 5a-1 and 5b-1. Is wrapped around. Further, a plurality of, here, eight engaging grooves 5b-2 for engaging with the engaging claw portions 6f, 7e of the separator neck portion 6 and the rear cover 7 are provided on the outer periphery of the neck side base portion 5b.

The separator neck portion 6 comprises an annular flange portion 6a and a substantially cylindrical boss portion 6b having a smaller diameter than the flange portion 6a. The inner periphery of the flange portion 6a and the boss portion 6b extends in a direction parallel to the axis. A plurality of ribs 6c are formed. Boss 6b of separator neck 6 and inner bobbin 2
Is connected to the neck side end 2b of the
6c and the rib 2 on the neck side end 2b of the inner bobbin 2.
b-1 is also connected. The boss 6b of the separator neck 6 has a plurality of slits 6 extending in a direction parallel to the axis.
b-1 is engraved and divided into a plurality of hook pieces 6d for winding the deflection coil. An engagement protrusion 6e for engaging with the engagement hole 7d of the rear cover 7 is provided at an upper end of the plurality of hook pieces 6d. Further, a plurality of engaging claws 6f for engaging with the engaging grooves 5b-2 of the neck-side base 5b of the outer bobbin 5 are provided on the screen side of the flange 6a. The engagement protrusion 6e of the separator neck 6 will be described later in detail.

The rear cover 7 has a three-stage cylindrical shape, one of which is open.
Base 5b and flange 6a of separator neck 6
A large cylindrical portion 7a for covering the boss portion 6b of the separator neck portion 6 having a smaller diameter than the large cylindrical portion 7a, and a small cylindrical portion 7c having a smaller diameter than the middle cylindrical portion 7b. It is molded integrally.

A plurality of engaging holes 7d are formed in the step surface between the middle cylindrical portion 7b and the small cylindrical portion 7c to be fitted with the engaging protrusion 6e of the separator neck 6. Further, a plurality of engaging claw portions 7e for engaging with the engaging grooves 5b-2 of the neck side base portion 5b of the outer bobbin 5 are provided at a side end of the large cylindrical portion 7a of the rear cover 7 in a protruding manner. Engagement claw 7e of rear cover 7
Will be described later in detail.

FIG. 2 shows the inner bobbin 2 other than the rear cover 7.
FIG. 4 is a perspective view showing a state in which a ferrite core 3, an outer bobbin 5, and a separator neck 6 are integrally assembled. An electric wire of a vertical coil is wound around the hooks 5a-1 and 5b-1 of the outer bobbin 5 having the ferrite core 3 fitted inside, and is extrapolated to the inner bobbin 2. Next, the separator neck 6 is inserted into the plurality of engagement grooves 5b-2 of the neck-side base 5b of the outer bobbin 5.
A plurality of engaging claws 6f are engaged with each other to bring the boss portion 6b of the separator neck portion 6 into contact with the neck side end portion 2b of the inner bobbin 2, thereby forming the rib 6c of the separator neck portion 6 and the rib of the inner bobbin 2. 2b-1. And inside bobbin 2
When the wire 9 of the horizontal coil is wound around the plurality of hooks 2a-1 and the plurality of hook pieces 6d of the separator neck 6, an assembled state as shown in FIG. 2 is obtained. FIG. 3 shows a state in which an electric wire 9 of a horizontal coil is wound around a plurality of hooks 2 a-1 of the inner bobbin 2 and a plurality of hook pieces 6 d of the separator neck 6.

FIG. 4 is a schematic view of the separator neck 6 around which the electric wire 9 is wound. The plurality of hook pieces 6d of the separator neck 6 are provided with a large number of fins 6d-1 for winding and guiding the electric wire 9, respectively. Since the wire 9 is wound around the plurality of hook pieces 6d of the separator neck portion 6 while being guided by the respective fins 6d-1, the inner diameter of the boss portion 6b of the separator neck portion 6 is tightened by the winding of the wire 9. Narrows to a tapered shape.

A tapered portion 6e-1 is formed in the engaging projection 6e of the separator neck portion 6, and a tapered surface 7d is formed in the engaging hole 7d of the rear cover 7 corresponding to the tapered portion 6e-1.
-1 is formed. The engaging projection 6e of the separator neck 6 has a sufficient length and strength so that it does not come off when fitted into the engaging hole 7d of the rear cover 7. Engaging projection 6
"e" has the same size at the same position as the engaging hole 7d, and is fitted when combined.

Next, as shown in FIG. 5, the rear cover 7 is pressed against the separator neck 6 around which the electric wire 9 is wound, and the tip of the engaging projection 6e of the separator neck 6 is inserted into the engaging hole 7d of the rear cover 7. Insert the tip of the engaging projection 6e of the separator neck 6 into the engaging hole 7d of the rear cover 7.
Abut on the tapered surface 7d-1.

Further, when the rear cover 7 is pressed against the separator neck 6, as shown in FIG. 6, the tip of the engaging projection 6 e of the separator neck 6 is engaged with the engaging hole 7 of the rear cover 7.
The tapered surface 6d-1 is guided by the tapered surface 7d-1 and moves outward while entering the engagement hole 7d. The tapered portion 6e-1 of the engagement projection 6e of the separator neck 6 and the engagement hole 7d of the rear cover 7 are formed. And the engagement protrusion 6e of the separator neck 6 and the engagement hole 7 of the rear cover 7 are fitted.
d is fitted at a predetermined position.

FIG. 7 shows the engagement projection 6 of the separator neck 6.
FIG. 9 is a diagram for explaining the fitting between the e and the engagement hole 7d of the rear cover 7; Here, for example, eight engagement projections 6e and engagement holes 7
d is fitted. That is, the engagement protrusion 6
eA is an engagement hole 7 dB, and an engagement protrusion 6 eB is an engagement hole 7 dB.
The engagement protrusion 6eC is provided with an engagement hole 7dC and the engagement protrusion 6eD.
Is an engagement hole 7dD, an engagement protrusion 6eE is an engagement hole 7dE,
The engagement projection 6eF is fitted and fixed at a predetermined position with the engagement hole 7dF, the engagement projection 6eG is fitted with the engagement hole 7dG, and the engagement projection 6eH is fitted with the engagement hole 7dH at a predetermined position. .

Therefore, the tip of the engaging projection 6e of the separator neck 6 is formed by the tapered surface 7 of the engaging hole 7d of the rear cover 7.
The tapered portion 6e-1 of the engagement protrusion 6e and the engagement hole 7 are moved outward while being guided by d-1 and entering the engagement hole 7d.
d and the tapered surface 7d-1 are closely fitted to each other, and the engaging projection 6e of the separator neck 6 and the engaging hole 7d of the rear cover 7 are formed.
Are fixed at a predetermined position and fixed, so that it is possible to reliably correct the deformation of the boss portion 6b of the separator neck portion 6 due to the tight tightening of the electric wire 9 and the reduction of the inner diameter thereof.

The engaging protrusion 6e of the separator neck 6 and the engaging hole 7d of the rear cover 7 are fitted at a predetermined position and are fixed after the fitting, so that the boss of the separator neck 6 after winding is formed. The dimensional accuracy of 6b can be kept constant, and the accuracy can be improved.

The hook piece 6 of the separator neck 6
Since the deformation after winding can be prevented without increasing the strength of d, the hook pieces 6d of the separator neck 6 can be prevented.
Does not need to be thick, the distance between the winding and the electron beam can be prevented from increasing, and the power to be deflected can be prevented from increasing. Further, since a projection for reinforcing the hook piece 6d of the separator neck 6 is not required, the degree of freedom of winding can be increased.

In the above-described embodiment, the engaging projection 6e is provided on the separator neck 6 and the engaging hole 7d is provided on the rear cover 7. However, the present invention is not limited to this. It is a matter of course that an engaging projection may be provided on the rim.

The engaging projection 6e of the separator neck 6 is formed with a tapered portion 6e-1.
Although the tapered surface 7d-1 is also formed on d, one of them may be provided with a taper for attracting. Although the separator neck is separate from the inner bobbin 2, the present invention is not limited to this, and the separator neck may be integral with the inner bobbin 2.

[0032]

As described above, according to the present invention,
Since the engagement portion of the neck portion of the first mold member and the engagement portion of the second mold member are fitted and fixed at a predetermined position, the neck portion of the first mold member is deformed due to tight tightening of the electric wire. As a result, the narrowing of the inner diameter can be reliably corrected, the dimensional accuracy of the neck portion of the first molded member after winding can be kept constant, and the accuracy can be improved.

Since deformation after winding can be prevented without increasing the strength of the neck portion of the first mold member, it is not necessary to make the neck portion of the first mold member thicker. An increase in the distance between the electron beam and the electron beam can be prevented, and an increase in the power to be deflected can be avoided. Further, since a projection for reinforcing the neck portion of the first mold member is not required, the degree of freedom of winding can be increased.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing the deflection yoke device in an assembled state without a rear cover.

3 is a view of the deflection yoke device in an assembled state of FIG. 2 as viewed from below.

FIG. 4 is a schematic view of a separator neck around which an electric wire is wound.

FIG. 5 is a schematic diagram showing a state where a rear cover is in contact with a separator neck.

FIG. 6 is a schematic diagram showing a state in which an engagement protrusion of a separator neck and an engagement hole of a rear cover are fitted.

FIG. 7 is a fitting diagram for explaining the fitting between the engaging projection of the separator neck and the engaging hole of the rear cover.

FIG. 8 is a diagram showing an example of a conventional flat bend type deflection yoke device.

FIG. 9 is a diagram showing a change in inner diameter of a neck portion of a conventional flat bend type deflection yoke device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Deflection yoke device, 2 ... Inner bobbin, 3 ...
・ Ferrite core, 5 ・ ・ ・ Outer bobbin, 6 ・ ・ ・ Separator neck (neck of first mold member), 6
a: flange portion, 6b: boss portion, 6d: hook piece, 6e: engaging projection (engaging portion), 6e-1 ...
Tapered part, 7 ... Rear cover (second mold member), 7d ... Engagement hole (engagement part), 7d-1 ... Tapered surface, 9 ... Electric wire

Claims (5)

[Claims] 1. A flat-bend type deflection yoke device, comprising: a substantially hollow rotor-shaped core gradually expanding from a neck side toward a screen side; A first mold member extending in a direction along a gun; and a second mold member engaged with the first mold member, wherein a wire of a deflection coil is wound around a neck portion of the first mold member. By fitting an engagement portion provided on the neck portion with an engagement portion of the second mold member,
A deflection yoke device, wherein a change in inner diameter due to tight tightening of the electric wire at a neck portion is corrected. 2. The deflection yoke device according to claim 1, wherein the second mold member is a rear cover. 3. The deflection yoke device according to claim 1, wherein a neck portion of the first mold member is a separator neck portion. 4. An engagement portion provided on a neck portion of the first mold member and an engagement portion of the second mold member comprise an engagement protrusion and an engagement hole. 4. The deflection yoke device according to 1. 5. The deflection yoke device according to claim 4, wherein at least one of the engagement protrusion and the engagement hole is provided with a taper for inviting.