JP2517354Y2 - Deflection coil winding form - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a winding form of a deflection coil applied to a deflection yoke installed in a cathode ray tube of a television receiver or the like.

[Conventional technology]

The deflection yoke uses a saddle type deflection coil for both horizontal deflection and vertical deflection, and uses a saddle type deflection coil for horizontal deflection and a vertical deflection type. There is a type that uses a toroidal deflection coil wound directly around a core as a coil.

In general, a deflection yoke installed in a cathode ray tube uses a saddle-shaped deflection coil winding die as shown in FIGS. 5 to 7 in order to ensure convergence characteristics. A so-called M-shaped upper die 53 has a square shape. By adjusting the shape of the center key 51, the convergence characteristics have been adjusted.

That is, this winding die includes a so-called M-shaped upper die 53 in which a square center key 51 having the engaging portion 50 is provided substantially at the center of the die surface 52, and an engaged portion that engages with the engaging portion 50. A so-called W-shaped lower mold 56 having a mold surface 55 having a mold surface 55 opposite to the mold surface 52 of the upper mold 53 with a winding gap. 58 is a guide.

At the time of winding, as shown in FIG. 8, the upper die 53 and the lower die 56 are opposed to each other, and the engaging portion 50 of the center key 51 of the upper die 53 is engaged with the engaged portion 54 of the so-called W-shaped lower die 56. Docking, the copper wire to be the electric wire of the coil is sequentially wound in the winding gap, current is applied to the copper wire to heat it, and the coil is formed by the press 57 shown in FIG. The coil 60 as shown in FIG.

[Problems to be solved by the device]

However, this winding form of the deflection coil has a drawback in that the degree of freedom in adjusting the characteristics of the convergence is limited because it is not possible to separately wind the portion where the coil is desired to be wound and the portion where the coil is desired to be removed. there were.

In addition, since there are few parts 59 that hit the center key 51 inside the coil, the wire insertion (the wires are wound in a line in order from the beginning to the end of the coil) is easy to change, which causes variation in convergence characteristics. Became.

In particular, it is one of the patterns of color shift in Convergence, in which the green line for the horizontal line of the corner of the screen drops to the center of the screen. Pattern) occurred and it was necessary to improve this.

Therefore, the object of the present invention is to improve the degree of freedom in adjusting the distribution of convergence characteristics, and
It is an object of the present invention to provide a winding form of a deflection coil capable of suppressing and stabilizing the variation in convergence characteristics and improving the green drop.

[Means for solving the problem]

In the deflection coil winding die of the present invention, a center key having an engaging portion is provided substantially at the center of the die surface, and the line regulating member is freely retractable at both sides of the center key on the die surface with a predetermined gap. And a lower mold having an engaged portion that engages with the engaging portion and having a mold surface facing the mold surface of the upper mold with a winding gap provided therebetween. .

[Action]

According to the structure of the present invention, the upper die and the lower die are combined with each other, and the coil is wound in the winding gap therebetween to form the deflection coil. In this case, since the line regulating members are provided on both sides of the center key so as to be retractable, the line regulating member can be projected from the mold surface to separately wind the coil into a desired portion and a desired portion. , The degree of freedom in adjusting the characteristics of convergence is improved. In addition, since the coil can be wound inside the wire regulation member, it is possible to suppress variations in convergence characteristics and stabilize them, and also to improve green drops.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. That is, the winding die of this deflection coil is the upper die 1
And a lower mold (not shown).

The upper mold 1 is provided with a center key 3 having an engaging portion 2 substantially at the center of a mold surface 4 and a line regulating member 5 on both sides of the center key 3 of the mold surface 4 with a predetermined gap as shown in the figure. It is installed freely.

The line restricting member 5 has a pushing mechanism 6 installed inside the upper mold 1. The upper die 1 is a so-called M type, and in the embodiment, the center key 3 and the line regulating member 5 are integrally combined. The mold surface 4 and the center key 3 are formed so as to match the shape of the inside of the coil, and the entire inside of the coil is brought into contact with the one surface 4 and the side surface of the center key 3 to prevent the wire from changing during winding. ing. In addition, the line regulation member 5
Are fan-shaped or triangular in plan view, and are provided on the curved surface 4a of the mold surface 4 on both sides of the center key 3. By pushing this wire regulation member 5 into a protruding state by a pushing mechanism 6, a coil separation portion is formed at a portion where the coil distribution is desired to be removed, and a coil divided into two can be wound.

The lower die (not shown) has an engaged portion (not shown) that engages with the engaging portion 2 and has a die surface facing the die surface 4 of the upper die 1 through the winding gap. However, the illustration is omitted because it is similar to FIG. 7.

The winding method is the same as in the conventional example. For example, a copper wire is wound in the winding gap between the upper mold 1 and the lower mold, heated, and pressed to form. In this case, when the winding is divided into a portion desired to be wound and a portion desired to be unwound, the wire regulating member 5 is pushed out so as to protrude from the mold surface 4. The timing of pushing out the wire regulating member 5 is electrically controlled by the winding number counter of the winding machine, the winding is stopped at a certain turn from the beginning of winding of the coil, and the wire regulating member 5 is pushed out by the pushing mechanism 6 to insert the wire. Then, the winding is restarted from the outside of the wire regulation member 5. As a result, the wound deflection coil 10 has, as shown in FIG. 4, for example, a coil hole portion 11 corresponding to the center key 3 and a separation portion 12 corresponding to the wire regulating member 5 are formed. Will be things.

The pushing mechanism 6, for example, fixes the line restricting member 5 to the shaft of the air cylinder and urges it by a spring so that it is housed in the hole of the upper mold 1, and the pushing force of the shaft of the air cylinder causes the upper mold 1 to move. When it is pushed up further and the axis of the air cylinder can be lowered, it is possible to withstand large vibrations of the winding die in the winding device by allowing it to be housed in the hole of the upper die 1 by the biasing force of the spring. Conceivable.

According to this embodiment, the upper die 1 and the lower die are combined with each other and the coil is wound in the winding gap therebetween to form the deflection coil. In this case, the line regulating members 5 are provided on both sides of the center key 3.
Since the coil is provided so as to be retractable, the coil can be separately wound into a portion to be wound and a portion to be pulled out by projecting the wire regulation member 5 from the mold surface 4, so that there is a degree of freedom in adjusting the characteristics of the convergence. Be improved. Further, since the coil can be wound inside the wire regulation member 5, it is possible to suppress variations in the characteristics of the convergence and stabilize it, and improve the green drop.

[Effect of device]

According to the winding form of the deflection coil of the present invention, the center key having the engaging portion is provided substantially at the center of the mold surface, and the center key and a predetermined gap are provided on both sides of the center key of the mold surface to regulate the line. An upper die having a member that can be retracted and retracted, and a lower die having an engaged portion that engages with the engaging portion and having a die surface that faces the die surface of the upper die through a winding gap. Since the wire restriction member is provided so as to project from the mold surface, the coil can be separately wound into a portion where the coil is desired to be wound and a portion where the coil is desired to be removed, so that the degree of freedom in adjusting the convergence characteristic is improved. In addition, since the coil can be wound inside the wire regulation member, it is possible to suppress variations in convergence characteristics and stabilize the characteristics, and also to improve the green drop.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an upper mold incorporating a center key according to an embodiment of the present invention, FIG. 2 is a partial plan view thereof, FIG. 3 is a sectional view taken along line III-III thereof, and FIG. FIG. 5 is a schematic front view of the deflected coil, and FIG.
FIG. 6 is an exploded perspective view including a guide, FIG. 7 is a perspective view of a lower mold, FIG. 8 is a perspective view of a state where the upper mold and the lower mold are separated and face each other, and FIG. 9 is a perspective view of a press. FIG. 10 is a perspective view showing a winding state of the coil with the lower die separated. 1 ... Upper mold, 2 ... Engagement part, 3 ... Center key, 4 ...
… Mold surface, 5 …… Line control member

Claims (1)

(57) [Scope of utility model registration request] 1. A center key having an engaging portion is provided substantially in the center of a mold surface, and line regulation members are provided on both sides of the center key of the mold surface so as to be retractable, with a predetermined gap between the center key and the center key. Deflection coil having an upper die and a lower die having an engaged portion that engages with the engaging portion and having a die surface that faces the die surface of the upper die via a winding gap. Winding form.