JP2002042689A - Deflection yoke device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection yoke device capable of increasing deflecting efficiency, assembly accuracy, and assembly without providing any special positioning rib for retaining a deflection yoke core and reducing the number of windable positions. SOLUTION: This deflection yoke device 1 comprises a core of generally hollow rotated shape 3 gradually divergent from the neck toward the screen, a first bobbin 2 installed along the inner surface of the core 3 and winding a horizontal deflection coil thereon, and a second bobbin 6 installed on the outside of the first bobbin 2 and winding a vertical deflection coil thereon. A plurality of specified winding ribs provided on the neck of the second bobbin 6 are used also as the positioning ribs, and the neck outer surface of the first bobbin 2 is retained inside the plurality of positioning ribs 5bC and 5bD.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plurality of predetermined winding ribs provided on the neck side of a second bobbin for winding a vertical deflection coil, which are also used as positioning ribs. The inner bobbin is pressed against the outer surface on the neck side of the first bobbin, and the outer surface of the plurality of positioning ribs is pressed against the inner surface of the core, so that no special positioning rib for pressing the core is required. The present invention relates to a deflection yoke device in which a winding rib can be thinned, thereby improving deflection efficiency, assembling accuracy, and assemblability.

[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.

FIG. 7 shows an example of a conventional deflection yoke device in which a horizontal deflection coil and a vertical deflection coil are wound in a saddle shape. FIG. 8 is a sectional view taken along line CC of FIG. The ferrite core 13 serving as a deflection yoke core is inserted into the body portion 15 of the outer bobbin 16 of the deflection yoke device 11, and the screen side end of the ferrite core 13 is inserted and fitted into the concave groove 14 b of the screen side base 14. Next, the screen-side base 14 is pushed into the main body 15 so that the screen-side base 14 and the main body 15 are fitted and integrated. The ferrite core 13 is attached and the screen side base 1
Outer bobbin 16 integrated by fitting body 4 and body 15
Is externally inserted into the inner bobbin 12, the positioning ribs 12c provided on the neck side of the inner bobbin 12 abut against the inner diameter of the ferrite core 13, and the winding ribs 15a, 15a provided on the main body 15 of the outer bobbin 16. It is to be sandwiched between.

[0004]

In the deflection yoke device 11 described above, the positioning ribs 12c are provided on the outer periphery of the inner bobbin 12 on the neck side.
Accordingly, there is a problem that the winding rib 15a on the neck side of the outer bobbin 16 becomes thicker in the radial direction, the inner diameters of the ferrite core 13 and the vertical deflection coil become larger, and the deflection efficiency decreases.

When the outer bobbin 15 is extrapolated to the inner bobbin 12 to press the ferrite core 13 and the positioning rib 12c of the inner bobbin 12, the inner bobbin 12 has a cylindrical shape, so that the strength is high and the deflection is low. Since it is small and the ferrite core 13 has almost no deflection, a considerable force is required to press-fit the ferrite core 13 and the assemblability deteriorates. For this reason, a gap must be formed between the positioning rib 12c of the inner bobbin 12 and the ferrite core 13. However, when combined with a ferrite core 13 having a large inner diameter, the inner bobbin 12 may have a gap. However, convergence and image distortion were caused.

Further, positioning ribs 12 are provided on the inner bobbin 12.
c, the outer bobbin 1 as shown in FIG.
6, it is necessary to provide the positioning rib receiver on the main body portion 15, and there is a problem that the number of places where the winding is possible is reduced accordingly.

Accordingly, the present invention provides a deflection yoke that can improve deflection efficiency, assembling accuracy, and assemblability without providing a special positioning rib for holding down the deflection yoke core and without reducing the number of places where winding can be performed. It is intended to provide a device.

[0008]

According to the present invention, there is provided a deflection yoke device comprising: a core having a substantially hollow rotating body shape gradually expanding from a neck side toward a screen side; and a horizontal deflection coil provided along an inner surface of the core. And a second bobbin provided outside the first bobbin for winding a vertical deflection coil, wherein a neck of the second bobbin is provided. A plurality of predetermined winding ribs provided on the side are also used as positioning ribs, and an inner surface of the first bobbin on the neck side is pressed inside the plurality of positioning ribs.

In the deflection yoke device according to the present invention, a plurality of predetermined winding ribs provided on the neck side of the second bobbin for winding the vertical deflection coil also serve as positioning ribs, and the plurality of positioning ribs are used. Inside of the first bobbin, the outer surface of the neck side of the first bobbin is pressed, so that the winding rib of the second bobbin can be made thin. Thereby, the inner diameters of the core and the vertical deflection coil can be reduced, and the deflection efficiency and the assembly accuracy can be improved.

[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 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 formed of an inner bobbin 2 as a first bobbin for holding a horizontal deflection coil, a screen side base 4 and a main body 5, and holds a vertical deflection coil and a ferrite core 3. And a neck bend portion 8 attached to the neck side base portion 5a of the body portion 5 of the outer bobbin and connected to the neck side end portion 2b of the inner bobbin 2. I have.

According to the present invention, the ferrite core 3 is pressed outside the winding rib 5b of the neck side base 5a of the body portion 5 of the outer bobbin, and the inner bobbin 2 is pressed inside the predetermined winding rib 5b. In addition, the deflection efficiency and the assembly accuracy are improved.

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 6, and the neck bend portion 8 are formed of a non-magnetic material such as a polypropylene resin. The screen side of the body portion 5 of the inner bobbin 2 and the outer bobbin is 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 has an annular screen-side base 2a and a cylindrical neck-side end 2b having a smaller diameter.
Are provided. A plurality of winding ribs 2c having an L-shaped side surface are formed on the screen-side base 2a for hooking electric wires of a horizontal deflection coil. On the outer periphery of the screen side base 2a, a plurality of engagement claws 2a-1 for engaging with engagement grooves 4e described later of the screen side base 4 of the outer bobbin 6 are provided in a protruding manner. Further, a plurality of ribs 2d for guiding the electric wires are formed inside the neck side end 2b.

Between the inner bobbin 2 and the outer bobbin 6,
A ferrite core 3 as a deflection yoke core is arranged. The ferrite core 3 is made of magnetic ferrite, and the screen side is formed in an expanded shape.

The outer bobbin 6 is formed of the screen side base 4 and the main body 5, and the ferrite core 3 is fitted between the screen side base 4 and the main body 5 by fitting the same. An annular concave groove 4b for fitting with the screen-side end of the ferrite core 3 is provided in a peripheral portion of the hole 4a inside the annular screen-side base 4. The mounting of the ferrite core 3 will be described later in detail.

A plurality of L-shaped side face winding ribs 4c for hooking electric wires of a vertical deflection coil are formed on a surface of the screen side base 4 opposite to the concave groove 4b, that is, an outer surface. I have. A plurality of engaging protrusions 4d for respectively engaging with a plurality of engaging portions 5d, which will be described later, of the main body 5 are provided on an outer peripheral portion of the screen side base 4, and a plurality of engaging claws of the inner bobbin 2 are provided. A plurality of engagement grooves 4e are provided for engaging with the portions 2a-1 respectively.

The main body 5 of the outer bobbin is provided with an annular neck base 5a having a smaller diameter than the annular screen base 4. The neck base 5a has a side reverse for hooking the electric wire of the vertical deflection coil. A plurality of L-shaped winding ribs 5b are formed. A plurality of openings 5c are formed on the tapered side surface of the main body 5.
Are drilled. A plurality of engaging portions 5d each having an engaging hole for engaging with the engaging protrusion 4d of the screen side base 4 are provided on the outer periphery of the screen side end of the main body portion 5. Further, a plurality of engagement grooves 5e for engaging with the engagement claw portions 8c of the neck bend portion 8 are provided on the outer periphery of the neck side base portion 5a.

The neck bend portion 8 is annular and has an inner hole 8a.
Are formed with a plurality of winding ribs 8b having an inverted L-shaped side surface. The neck bend portion 8 and the neck side end portion 2b of the inner bobbin 2 are connected, and the winding rib 8b of the neck bend portion 8 is connected.
And the rib 2d of the neck side end 2b of the inner bobbin 2 are also connected. Further, on the screen side of the neck bend portion 8, a plurality of engaging claws 8c for engaging with the engaging grooves 5e of the neck side base portion 5a of the main body portion 5 are protruded.

FIG. 2 is an assembly diagram in which the screen side base 4, the main body 5, and the ferrite core 3 of the outer bobbin 6 are integrally assembled. The ferrite core 3 is inserted inside the main body 5 of the outer bobbin 6, the screen side end of the ferrite core 3 is inserted into the groove 4 b of the screen side base 4 and fitted, and then the screen side base 4 is inserted into the main body 5. By pushing in, the plurality of engagement protrusions 4d of the screen side base 4 and the engagement portion 5d of the main body 5 are engaged and fitted, and the main body 5 and the screen side base 4 are integrated. In this state, the outer bobbin 6
The electric wire of the vertical deflection coil is wound between the winding rib 5b of the main body 5 and the winding rib 4c of the screen side base 4, and is extrapolated to the inner bobbin 2.

Next, a plurality of engagement claws 8c of the neck bend portion 8 are engaged with a plurality of engagement grooves 5e of the neck side base portion 5a of the body portion 5 of the outer bobbin 6, and the neck bend portion 8 and the inner bobbin 2 are engaged. When the winding rib 8b of the neck bend portion 8 and the rib 2d of the inner bobbin 2 are connected to each other, the assembled state as shown in FIG. 3 is obtained. The plurality of winding ribs 2c of the inner bobbin 2 and the neck bend portion 8
The wire of the horizontal deflection coil is wound around the plurality of winding ribs 8b.

Next, the plurality of winding ribs 5b of the main body 5 of the outer bobbin 6 will be described. 4 is a sectional view taken along line AA of FIG. 3, and FIG. 5 is a sectional view taken along line BB of FIG. here,
The state where the electric wire is not wound is shown for easy understanding. As shown in FIG. 4, the inside of the neck-side end of the ferrite core 3 is pressed by the outside of the tip 5b-1 of the plurality of winding ribs 5b of the main body 5 of the outer bobbin. On the other hand, the screen-side end of the ferrite core 3 is fitted into the concave groove 4 b of the screen-side base 4. As a result, the ferrite core 3 is fitted to the outer bobbin 6 without rattling. At this time, as shown in FIG. 6, the tip portions 5b-1 of the plurality of winding ribs 5b are bent inward, and the winding ribs 5b
The outside dimension of the tip 5b-1 is large within the inner diameter tolerance of the ferrite core 3 so as to absorb variations in the ferrite core 3 and achieve eccentricity accuracy.

As shown in FIG. 5, four winding ribs 5bA, 5bB, 5bC and 5bD are used as positioning ribs at 90 ° intervals among a plurality of winding ribs 5b of the main body 5 of the outer bobbin 6. . Here, the pair of first positioning ribs 5bA and 5bB opposed to each other are made thicker than the other winding ribs and protrude inward. The other pair of second positioning ribs 5bC and 5bD are formed with the same dimensions as the other winding ribs. On the other hand, small protrusions 2 each having a flat tip are provided at the abutting portions of the inner bobbin 2 with the positioning ribs 5bA, 5bB, 5bC, 5bD on the outer periphery of the neck side end 2b.
b-1 is provided. The small protrusion 2b-1 is formed by the rib 2d protruding in the outer peripheral direction.

The first positioning ribs 5bA and 5bB come into contact with the small projections 2b-1 and 2b-1, and the second positioning ribs 5bC and 5bD come into contact with the small projections 2b-1 and 2b-1. ing. The positioning ribs 5bA of the inner bobbin 2,
The inner dimensions of 5bB, 5bC and 5bD are the inner bobbin 2
Are smaller within the outer dimension tolerance of the neck side end 2b.

Next, how to extrapolate the outer bobbin 6 to the inner bobbin 2 will be described. When the ferrite core 3 is mounted, and the outer bobbin 6 integrated by fitting the screen-side base 4 and the main body 5 to the inner bobbin 2 is extrapolated, the pair of first positioning ribs 5bA and 5bB of the main body 5 become Small protrusions 2b-1, 2b-1 on the outer periphery of the neck side end 2b of the inner bobbin 2.
When the outer bobbin 6 is further pushed in, the second positioning ribs 5bC and 5bD contact the small protrusions 2b-1 and 2b-1. That is, the positioning ribs 5bA, 5bB, 5b
C, 5bD and small projections 2b-1, 2b-1, 2b-1, 2b-1 are pressed against each other and fixed in position.

Since both the outer bobbin 6 and the inner bobbin 2 are made of a synthetic resin such as a polypropylene resin, both the outer bobbin 6 and the inner bobbin 2 can absorb the bending tolerance and can be press-fitted. At this time, the positioning ribs 5bA, 5bB, 5bC, 5bD of the body portion 5 of the outer bobbin and the small projections 2b-1, 2b-1, 2b-1, 2b-1 of the inner bobbin 2 are formed.
Since the contact portion is a surface contact, the dimensional accuracy can be easily maintained and the strength can be increased.

Further, conventionally, since a positioning rib was provided on the outer periphery of the neck side of the inner bobbin, it was necessary to provide a rib receiver for receiving the positioning rib on the outer bobbin. However, the winding rib 5b of the outer bobbin 6 was positioned. Rib 5b
A, 5bB, 5bC, 5bD
The winding space on the neck side base portion 5a side of the outer bobbin does not decrease, and the winding space can be increased as compared with the related art.

Therefore, since the positioning rib for positioning the ferrite core 3 is not provided on the inner bobbin 2 for holding the horizontal deflection coil, the winding on the neck side of the outer bobbin 6 for holding the vertical deflection coil is not provided. The ribs 5b can be made thinner in the radial direction, and the linearity of the windings with respect to each winding rib 5b can be reduced.

Since the winding rib 5b on the neck side of the outer bobbin 6 for holding the vertical deflection coil can be made thinner in the radial direction, the inner diameters of the ferrite core 3 and the vertical deflection coil can be reduced, thereby improving the deflection efficiency. be able to.

Even if the tolerance between the inner bobbin 2 and the outer bobbin 6 is reduced, both the outer bobbin 6 and the inner bobbin 2 are made of synthetic resin, and the inner bobbin 2 is pressed by the outer bobbin 6. In both cases, the bending tolerance can be absorbed, the press-fitting can be easily performed, and the assembling accuracy and assemblability can be improved.

The tip 5b-1 of the winding rib 5b is bent inward, and the outer dimension of the tip 5b-1 of the winding rib 5b is larger than the larger dimension within the inner diameter tolerance of the ferrite core 3. Therefore, variations in the dimensions of the ferrite core 3 can be absorbed, and the eccentricity of the ferrite core 3 can be improved.

In the above-described embodiment, four positioning ribs are used. However, the number of ribs is not limited to four, and it is a matter of course that other positioning ribs such as three, five, and six may be used.

[0034]

As described above, according to the present invention,
Since a positioning rib for positioning the core is not provided on the first bobbin around which the horizontal deflection coil is wound,
The winding ribs on the neck side of the second bobbin around which the vertical deflection coil is wound can be made thin in the radial direction, and the linearity of the winding with respect to each winding rib can be reduced.

The winding rib on the neck side of the second bobbin for winding the vertical deflection coil can be radially thinned, and the inner diameters of the core and the vertical deflection coil can be reduced, so that the deflection efficiency can be improved. Can be.

Even if the tolerance between the first bobbin and the second bobbin is reduced, both the first bobbin and the second bobbin are made of synthetic resin, and the second bobbin holds down the first bobbin. The bending tolerance can be absorbed by both the second bobbin and the first bobbin, the press-fitting can be easily performed, and the assembling accuracy and assemblability can be improved.

[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 an assembly diagram in which a screen-side base, a main body, and a ferrite core of an outer bobbin are integrally assembled.

FIG. 3 is a perspective view of the deflection yoke device in an assembled state.

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

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a side sectional view showing that a winding rib is bent in an inward direction.

FIG. 7 is a side sectional view showing an example of a conventional deflection yoke device.

FIG. 8 is a sectional view taken along line CC of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Deflection yoke device, 2 ... Inner bobbin (1st bobbin), 2b ... Neck side end part, 2b-1 ... Small protrusion (projection part), 3 ... Ferrite core ( Core), 4 ・
..Screen-side base, 5 ... body, 5a ... neck-side base, 5b ... winding ribs, 5bA, 5bB ...
1st positioning rib, 5bC, 5bD 2nd positioning rib, 6 ... outside bobbin (2nd bobbin), 8
... Neck bend part

Claims (5)

[Claims] 1. A substantially hollow rotating body-shaped core that gradually widens from a neck side toward a screen side, and a first coil provided along an inner surface of the core for winding a horizontal deflection coil.
And a second bobbin provided outside the first bobbin for winding a vertical deflection coil, wherein a plurality of predetermined bobbins provided on the neck side of the second bobbin are provided. Wherein the winding rib is also used as a positioning rib, and an inner surface of the first bobbin on the neck side is pressed inside the plurality of positioning ribs. 2. The deflection yoke device according to claim 1, wherein the first bobbin and the second bobbin can be divided into at least two in an axial direction. 3. The deflection yoke device according to claim 1, wherein an inner surface of the core is pressed outside the plurality of positioning ribs. 4. The deflection yoke according to claim 1, wherein a projection having a flat end is formed at a position where the outer surface of the first bobbin on the neck side contacts the positioning rib. apparatus. 5. The deflection yoke device according to claim 1, wherein at least a pair of opposing positioning ribs of the plurality of positioning ribs protrude inward from other positioning ribs.