JPS6025813Y2 - deflection yoke - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a semi-droital type deflection yoke.

Conventionally, in a semi-toroidal deflection yoke in which the vertical deflection coil is wound in a toroidal shape and the horizontal deflection coil is wound in a saddle shape, the core 22 is wound in a toroidal shape as shown in FIG. In the gap formed between the vertical deflection coil 23 and the horizontal coil bobbin 25 having the horizontal deflection coil 26 wound in a hollow shape on the inner surface, an elastic material 27 such as neoprene rubber having a wall thickness almost equal to the gap is installed. was attached to the horizontal coil bobbin 25 to prevent the installation of the vertical deflection coil 23 from wobbling and to align the axis.

However, in the deflection yoke having such a configuration, the vertical deflection coil 23 causes defects in the characteristics of the deflection yoke, such as axial deviation due to movement after alignment due to variations in the thickness of the elastic material 27 and elasticity. There were problems such as instability.

The present invention provides a semi-toroidal deflection yoke aimed at eliminating these conventional drawbacks.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIG. 1, 1 is a semi-toroidal deflection yoke body, which includes a core 2, a vertical deflection coil 3 wound directly around the circumferential surface of the core 2 in a toroidal shape, and a pair of vertical deflection coils 3 mounted on the inner surface of the core 2. A vertical coil bobbin 4 formed by joining a pair of semi-annular bobbins, a horizontal coil bobbin 5 formed by joining a pair of semi-annular bobbins fitted and fixed inside the vertical coil bobbin 4, and a horizontal coil bobbin 5 connected through the horizontal coil bobbin 5. A horizontal deflection coil 6 is wound around the inner surface of the cathode ray tube 7, and is fixedly mounted on the cathode ray tube 7.

As shown in FIGS. 2 and 3, the vertical coil bobbin 4 of the deflection yoke main body 1 has a vertical deflection coil 3 wound around a waist core 2 having an outer diameter that is approximately the same as the inner diameter of the core 2. 4, the core 2 and the vertical deflection coil 3 are in close contact with each other without wobbling, and the center of the vertical deflection coil 3 is located symmetrically with respect to the axis X of the vertical coil bobbin 4.

Further, the inner diameter of the vertical coil bobbin 4 is approximately the same as the outer diameter of the horizontal coil bobbin 5, and the pair of semi-circular vertical coil bobbins 4 are connected to a plurality of latches provided at the divided ends of the vertical coil bobbin 4. The tube axis of the horizontal coil bobbin 5 and the vertical coil bobbin 4 are engaged with each other by the piece 12 to form an annular bobbin, and the tube axis of the horizontal coil bobbin 5 and the vertical coil bobbin 4 are positioned at a position where the center magnetic field of the horizontal deflection coil 6 and the center magnetic field of the vertical deflection coil 3 coincide with the outer surface of the horizontal coil bobbin 5. Align the tube axes and fit and secure both bobbins.

In this case, the horizontal coil bobbin 5 and the vertical coil bobbin 4 are in close contact with each other with almost no gap, and once they are fitted and fixed, there will be no wobbling or off-axis. The matching dimensions and positions are set so that the central magnetic fields of the horizontal deflection coil 6 and the vertical deflection coil 3 coincide with each other, so that optimum naconvergence can be obtained.

In the deflection yoke of the present invention constructed in this way, the central axes of the vertical deflection coil 3, core 2, horizontal deflection coil 6, vertical coil bobbin 4, and horizontal coil bobbin 5 can be structurally aligned just by assembling each part. In principle, axis alignment is not necessary after mating and combination, but in reality there are variations in the dimensions of each part, and if necessary, move the vertical coil bobbin 4 slightly to align the axis with the horizontal coil bobbin 5, and align the axes of both coils. Just make them match.

Further, the vertical coil bobbin 4 is provided with two or more lead fixing pieces 11 integrally formed with the vertical coil bobbin 4 at an appropriate location on the head, tail, or side of the vertical deflection coil 3. ]・Line 13 is drawn out with a karage.

As mentioned above, the deflection yoke of the present invention has a shape in which the vertical coil bobbin is aligned with the horizontal coil bobbin in advance, so that the vertical and horizontal circular deflection yoke can be coiled simply by fitting and fixing both coil bobbins. It is easy to align the axes of the bobbins to obtain optimal convergence, and the positional relationship of both bobbins does not change even after assembly, providing stable characteristics over a long period of time. Even if adjustment is required, the vertical and horizontal circular coils can be adjusted by slightly moving the vertical coil bobbin and aligning the axis with the horizontal coil bobbin. This reduces variations in convergence characteristics and improves the quality of the deflection yoke. do.

In addition, conventionally, the lead wire of the vertical deflection coil was soldered with polyamide resin, but by connecting the lead wire to a lead fixing piece provided on the vertical coil bobbin and pulling it out, there is no need to secure the wire, making work easier and more convenient. Furthermore, by attaching a vertical coil bobbin and a vertical deflection coil during the winding process, it is possible to protect the coil from scratches and dirt during handling.

[Brief explanation of the drawing]

1 is a perspective view of a deflection yoke showing an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a perspective view of a vertical deflection coil wound around a vertical bobbin and a core. FIG. 4 is a sectional view of a conventional deflection yoke. 1: Deflection yoke body, 2: Core, 3: Vertical deflection coil,
4: Vertical coil bobbin, 5: Horizontal coil bobbin, 6: Horizontal deflection coil.

Claims (1)

[Scope of utility model registration request] In a semi-toroidal deflection yoke in which a vertical deflection coil is wound in a toroidal shape and a horizontal deflection coil is wound in a saddle shape, the vertical deflection coil is wound around a core so that the outer diameter is approximately the same as the inner diameter of the core. The vertical coil bobbin and the vertical deflection coil are mounted closely together with their axes aligned on the outer surface of a vertical coil bobbin, and the vertical coil bobbin on which the vertical deflection coil is mounted has an outer diameter that is approximately the same as the inner diameter of the vertical coil bobbin. Then, the vertical coil bobbin and the horizontal coil bobbin are mounted in close contact with the outer surface of a horizontal coil bobbin on which the horizontal deflection coil is wound on the inner surface of the horizontal coil bobbin so that the center magnetic field of the horizontal deflection coil and the center of the vertical deflection coil are aligned. A deflection yoke characterized by fixing a circular deflection coil by matching magnetic fields.