JPH0646545B2 - Deflection yoke - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke used in a high definition CRT display device.

2. Description of the Related Art Generally, a deflection yoke has a winding frame (slot) formed in a conical radial shape (a trumpet shape) and a winding frame having circumferentially formed grooves at both ends thereof. It is composed of split stator windings.

Problems to be Solved by the Invention In recent years, since the CRT is flattened, the deflection is required to be severe, and moreover, the display is often used for characters such as personal computers, so that the deflection is required to be accurate. There is. Conventionally, the deflection coil is said to be winding, and the shape of the coil after winding or shaping may be irregular, or the number of winding layers and the number of windings in each layer may vary from slot to slot. The control was almost impossible. For this reason, a deflection yoke having a structure in which an alignment layer of an aligned winding deflection coil is provided in opposition to a CRT has been proposed, but in this method, a coil having an approximately quadrangular cross section and a substantially quadrilateral aligned winding is made into a saddle shape. There is a problem in that it is necessary to form the coil, and even if a part of the coil is bent at a right angle, it is difficult to fit the coil cross section within the original square cross section.

The present invention solves the above problems, and an object thereof is to provide a deflection yoke capable of forming a saddle-shaped coil by bending a coil having a square cross section at a right angle without breaking the cross section.

Means for Solving the Problems In order to solve this problem, the present invention has a cross section close to a square and is wound substantially in a quadrangle, while twisting 180 ° around the respective axes with the opposite sides as axes. A saddle-shaped coil is formed by bending 90 ° at right angles to the axial center, and one set or a plurality of saddle-shaped coils having different sizes and different numbers of windings are installed substantially concentrically.

Action With this configuration, even if a part of the coil is bent at a right angle, the expansion ratios of the other parts of the coil are almost equal, so that the cross-sectional shape does not change, and a smooth saddle-shaped yoke can be smoothly molded. At the same time, variations in magnetic field distribution between individuals can be reduced.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, 1 is a substantially quadrangular aligned winding coil,
The cross-sectional shape of this coil 1 is close to a square, as shown in FIG. Reference numeral 1a is a bent portion of one side of the quadrilateral coil 1 for forming a saddle shape.

FIG. 3 is a view for explaining how to bend the coil. As shown in FIG. 3 (a), the coil portions 1b and 1c on both sides of the bent portion 1a are 180 ° around the axis in the arrow A direction with the above-mentioned one side as an axis. While twisting, bend 90 ° in the direction of arrow B at a right angle to the axis, as shown in Fig. 3.
Raise as in (b). By bending in this manner, the elongation percentage of the coil portion other than the bent portion can be made substantially uniform, and the cross-sectional shape of the portion can be maintained in the original square shape.

FIG. 4 shows a step of forming the coil into a saddle shape. Fig. 4
Reference numeral 1 shown in (a) is a quadrilateral coil having a plurality of aligned and wound cross-sections close to a square, as in FIG. 1, and uses a heat fusion-coated copper wire. One side C of this coil 1 is floated from the coil surface so that the center portion of the side C is inflated most. Then as in the FIG. 4 (b), 'and,該辺C' side C of leavened corner D ₁ of the, with corner D ₂ causes the coil surface. Next, as shown in FIG. 4 (c), the two sides H ₁ and H ₂ adjacent to the raised side C ″ are rotated 180 ° about the respective sides, and each point E ₁ on the sides H ₁ and H ₂ is rotated. , E ₂ , G ₁ , G ₂ as centers, and the side C ″ and the side J opposite thereto are bent at right angles to form one saddle coil 2 as shown in FIG. 4 (d). It is preferable to use a heat fusion-coated copper wire as a means for facilitating the molding in each of the above steps.

FIG. 5 shows a coil group in which the saddle-forming coils 2, 3 and 4 having different sizes and different numbers of turns, which are formed through the process of FIG. As a means for mounting each coil group, it is convenient to fix the crossover portions 5 (corresponding to sides J, C ″ in FIG. 4 (c)) to each other by heat fusion.

EFFECTS OF THE INVENTION As described above, according to the present invention, the image distortion adjustment by the deflection yoke of the CRT can be simplified, and a display device with uniform image quality can be provided. In addition, there are some things with great industrial or quality value.

[Brief description of drawings]

FIG. 1 is a diagram showing a quadrilateral aligned winding coil which is a first step of a deflection coil according to an embodiment of the present invention, FIG. 2 is a sectional view of the coil having a substantially square cross section, and FIG. FIG. 4 is a view showing a state in which a part of a coil is bent at a right angle, FIG. 4 is a view showing a step of forming into a saddle shape, and FIG. 5 is a saddle formation having different sizes and different numbers of windings formed through the steps of FIG. It is a figure which shows the coil group which integrated the shape coil substantially concentrically. 1 ... Coil, 1a ... Bending part, 2-4 ... Saddle coil, 5 ...
Crossover section

Claims (1)

[Claims] 1. A cross section is close to a square, and the windings are arranged in a substantially quadrilateral shape, and the two sides facing each other are used as axes to form 180 turns around the respective axes.
Deflection in which a saddle-shaped coil is formed by bending at right angles to the axis while twisting, and a set of this saddle-shaped coil or a set of a plurality of saddle-shaped coils with different sizes and numbers of windings are installed substantially concentrically. yoke.