JPH1050236A - Deflecting yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively evade the playing of a core, by pressing the recessed part of the core in a direction for widening the interval of the abutting surface of the core by an elastic piece protruded from a coil bobbin in a deflection yoke. SOLUTION: A horizontal deflection coil is arranged in the inner side of a separator 20, and therein a projection 20L is formed on the outer side in accordance with a groove 3L formed by a recessed part on the funnel bend sides of cores 3A and 3B, to position the cores 3A and 3B. Moreover, projections 20A and 20B, composed of a pair of elastic pieces, are formed in accordance with a groove 3U on the neck bend side of the separator 20, and are arranged so as to press both the side surfaces and bottom surface of the groove 3L of the cores 3A and 3B, in addition are absorbing the dispersion of the dimensions of the cores 3A and 3B, to position and retain the cores 3A and 3B by pressing the recessed parts of the cores 3A and 3B in a direction widening an interval between the abutting surfaces 3M of the cores 3A and 3B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke, and more particularly to an elastic piece protruding from a coil bobbin, which presses the core in a direction to widen a gap between abutting surfaces, thereby absorbing variations in the core by displacement of the elastic piece. And effectively avoids rattling of the core.

[0002]

2. Description of the Related Art Conventionally, in a deflection yoke, a pair of cores is arranged outside a horizontal deflection coil and a vertical deflection coil, and a magnetic circuit of the horizontal deflection coil and the vertical deflection coil is formed by the core. I have.

That is, as shown in FIG. 4, in this type of deflection yoke 1, a pair of horizontal deflection coils wound in a saddle shape using a mold are arranged inside a separator 2 formed of a coil bobbin. Further, in the deflection yoke 1, a pair of cores 3A
And 3B, each of which is wound with a magnet wire to form a vertical deflection coil V.
The pair of cores 3 </ b> A and 3 </ b> B are arranged outside the separator 2. Further, in the deflection yoke 1, the front cover 4, the back cover 5
After the components are attached, the process is completed through a predetermined adjustment process.

In assembling the deflection yoke 1 in this manner, the cores 3A and 3B are formed by dividing a substantially conical cylindrical shape into two parts by a virtual plane passing through the center axis, and abutting corresponding to the virtual plane. The pair of cores 3A and 3B are abutted against each other so as to abut on the surface 3M, and are pressed and held by a clamper 6 made of a spring-shaped metal piece. Further, the cores 3A and 3B are formed such that recesses are formed by stepwise cutting the upper and lower ends of the abutting surface 3M, and grooves 3U and 3L are formed when the abutting surfaces 3M abut against each other. Has been made. Core 3
A and 3B are the separators 2 by the grooves 3U and 3L.
Is held in position.

[0005] That is, a cross section taken along the line AA
As shown in (2), a rectangular projection 2A is formed on the outer peripheral surface of the separator 2 so as to fit into the groove 3U. In the deflection yoke 1, the projections 2A position the cores 3A and 3B so as not to rotate in the circumferential direction, and reduce variations in convergence characteristics and the like due to movement of the cores 3A and 3B.

[0006]

When the cores 3A and 3B are positioned and held by the projections 2A in this manner, the size of the projections 2A must be set to the maximum value of the dimensional tolerance of the cores 3A and 3B. Absent. On the other hand, core 3
A and 3B are characterized by being formed of a sintered ferrite material, and thus have significantly lower dimensional accuracy than molded products such as the separator 2.

For this reason, in the conventional deflection yoke 1, rattling occurs in the cores 3A and 3B at the projection 2A,
There was a problem that the cores 3A and 3B could not be completely positioned and fixed only by the projection 2A.

In the manufacturing process of the deflection yoke 1, in order to absorb such rattling of the cores 3A and 3B in the rotational direction, the cores 3A and 3B are measured again after the cores 3A and 3B are attached and the crosstalk value is measured. Is finely adjusted, and then the cores 3A and 3B are fixed with an adhesive.

The present invention has been made in view of the above points, and an object of the present invention is to propose a deflection yoke which can effectively prevent rattling of a core.

[0010]

According to the present invention, there is provided a deflection yoke in which a pair of cores are arranged, wherein an elastic piece protruding from a coil bobbin is used for the deflection yoke.
The concave portion of each core is pressed in a direction to increase the space between the butting surfaces of the pair of cores.

[0011] The elastic piece protruding from the coil bobbin,
If the recesses of each core are pressed in a direction in which the gap between the abutting surfaces of the pair of cores is widened, the elastic pieces bend to absorb variations in the dimensions of the recesses, thereby effectively avoiding rattling in the recesses. be able to.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 is a plan view and a side view showing the entire configuration of the deflection yoke according to the embodiment of the present invention. In the deflection yoke 10, a brim-shaped iron piece 12 is arranged on a funnel bend side with respect to a coil assembly 11 in which a deflection coil and a core are assembled, thereby correcting the magnetic field distribution. In addition, the lead wire of the deflection coil is connected to the lead wire 14 via the terminal 13, and the lead wire 14
A deflection current is supplied to each deflection coil of the coil assembly 11 through the coil. A ferrite piece for magnetic field correction is arranged on the neck bend side, and is held by a band 15 at a neck between cathode lines.

FIG. 1 is a side view showing the coil assembly 11 in detail. In FIG. 1, the description of the vertical deflection coil is omitted. In this coil assembly 11, a pair of horizontal deflection coils wound in a saddle shape using a mold are used as separators 2 made of coil bobbins.
0. In this embodiment,
The separator 20 is formed by assembling a member having a substantially funnel shape divided into two by an imaginary line passing through a central axis.

Further, the coil assembly 11 has a pair of cores 3A and 3B, on each of which a magnet wire is wound to form a vertical deflection coil, and as shown by an arrow B, a pair of coils wound in this manner. Cores 3A and 3B
Is arranged outside the separator 20.

Each of the cores 3A and 3B has a cross section taken along the line CC, and as shown in FIG. 3, a groove 3N is formed close to the abutting surface 3M and parallel to the outer side surface. The cores 3A and 3B are made of a clamper 6 made of a spring-like metal piece.
Is caught in the groove 3N, so that the cores 3A and 3B are pressed and held by the clamper 6 so that the cores 3A and 3B abut on the butting surface 3M as shown by the arrow D.

The separator 20 (FIG. 1) has grooves 3 formed by recesses on the funnel bend side of the cores 3A and 3B.
A projection 20L having a rectangular shape is formed on the outer side surface corresponding to L, and the projection 20L is arranged in the groove 3L to position the cores 3A and 3B. Further, in the separator 20 (FIG. 3), projections 20A and 20B formed of a pair of elastic pieces are formed corresponding to the grooves 3U formed by the recesses on the neck bend side of the cores 3A and 3B.

Here, these projections 20A and 20B are formed so as to protrude in a columnar shape after gradually decreasing in diameter from the root and rising in a tapered shape, thereby being pressed by the cores 3A and 3B. The whole is formed to bend. Further, when the cores 3A and 3B are arranged as shown by arrows E, the projections 20A and 20B are at predetermined positions so as to press both sides of the groove 3L and to press the bottom surface of the groove 3L together. Be placed. As a result, the projections 20A and 20B press the recesses of the cores 3A and 3B in a direction to widen the interval between the butting surfaces 3M, and are pressed and bent by the cores 3A and 3B, so that the dimensions of the cores 3A and 3B are reduced. Variations are absorbed and the cores 3A and 3B are positioned and held.

In the above configuration, the deflection yoke 10 (FIG. 1) is provided with a horizontal deflection coil wound by a mold, and is arranged inside the separator 20. Further, the deflection yoke 10
The vertical deflection coils are wound around the cores 3A and 3B, respectively, and these cores 3A and 3B are arranged outside the separator 20. At this time, in the deflection yoke 10, the core 3A
And 3B are butted by the butting surfaces 3M, and the clampers (FIG. 3) are hooked into the grooves 3N of the cores 3A and 3B.
B is held.

At this time, in the deflection yoke 10, on the funnel bend side, rectangular projections 20L protruding from the outer side surface of the separator 20 are formed in the grooves 3 of the cores 3A and 3B.
L, the cores 3A and 3B are arranged so as to engage with the cores 3A and 3B on the funnel bend side.
B is roughly positioned and held.

On the other hand, on the neck bend side, in the deflection yoke 10, the projections 20A and 20B protruding from the outer side surface of the separator 20 are bent to press both side surfaces of the groove 3U of the cores 3A and 3B. Thereby, the cores 3A and 3
The dimensional variation of B is absorbed, and the rattling of the cores 3A and 3B in the rotational direction is effectively avoided, and the cores 3A and 3B
B is positioned. Also, cylindrical projections 20A and 20A
By pressing the cores 3A and 3B by 0B,
Even when the concave portions of the cores 3A and 3B are formed on a rough surface, the dimensional variations of the cores 3A and 3B are reliably absorbed.

According to the above construction, the core 3A is formed by the cylindrical projections 20A and 20B projecting from the separator.
And 3B in the direction of increasing the space between the butting surfaces 3M,
By pressing the cores 3A and 3B, these projections 2
Variations in the dimensions of the cores 3A and 3B can be absorbed by the deflections of the cores 3A and 3B, and rattling of the cores 3A and 3B in the rotational direction can be effectively avoided. Therefore,
It is possible to omit the fine adjustment work after the core is attached, and to shorten the work time. Further, variations in convergence characteristics and the like can be reduced.

In the above-described embodiment, the case where the positioning is performed by the elastic piece only on the neck bend side is described. However, the present invention is not limited to this, and can be applied to the funnel bend side.

Further, in the above-described embodiment, the case where the elastic pieces for pressing the cores 3A and 3B are formed by cylindrical projections is described, but the present invention is not limited to this, and various shapes may be used as necessary. Can be widely applied.

In the above embodiment, the core 3
Using the step-like notch formed in A and 3B,
Although the case where the core is pressed in the direction of increasing the distance between the butting surfaces of the cores 3A and 3B has been described, the present invention is not limited to this, and various concave portions are formed in the core as necessary, and the concave portions are used. The present invention can be widely applied to the case where the core is positioned.

Further, in the above-described embodiment, a case has been described in which the vertical deflection coil is formed by toroidal winding and the horizontal deflection coil is formed in a saddle shape using a mold. The present invention can be widely applied to various deflection yokes, for example, when the deflection coil and the horizontal deflection coil are formed in a saddle shape.

[0027]

As described above, according to the present invention, the elastic pieces protruding from the coil bobbin press the core in a direction to increase the distance between the abutting surfaces, so that the variation of the core is absorbed by the displacement of the elastic piece. However, rattling of the core can be effectively avoided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a coil assembly of a deflection yoke according to an embodiment of the present invention.

FIG. 2 is a plan view and a side view showing the deflection yoke of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1 taken along line CC.

FIG. 4 is a side view showing a conventional deflection yoke.

FIG. 5 is a cross-sectional view of FIG. 4 taken along line AA.

[Explanation of symbols]

1, 10 deflection yoke, 2, 20 separator, 2
A, 20A, 20B, 20L ... Projection, 3A, 3B ...
Core, 3U, 3L ... groove, V ... vertical deflection coil

Claims (1)

[Claims] 1. A deflection yoke in which a pair of cores are arranged so as to surround a deflection coil from the outside and a magnetic circuit of the deflection coil is formed by the core, wherein the pair of cores are adjacent to an abutting surface. The deflection yoke presses the recesses of the respective cores in a direction in which an interval between the abutting surfaces is widened by an elastic piece projecting from a coil bobbin.