JPH0121473Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deflection yoke mounted on a picture tube of a television receiver or the like.

Recently, in order to improve the deflection sensitivity of a deflection yoke mounted on a television receiver or monitor picture tube, a cut groove is formed on the inner surface of the core and a deflection coil is inserted into the cut groove. A structure in which the core is wound in a hollow shape on the inner surface of the core has been developed and put into practical use.

In the conventional deflection yoke having the above-mentioned configuration, the grooves provided on the inner surface of the core are continuous from the front end to the rear end, and as a result, the number of grooves at the front end and the rear end of the inner surface of the core are set to be equal. It was hot. For this reason, a deflection coil that is inserted into a kerf and wound in a saddle shape is wound while being inserted into the same kerf between the front and rear ends of the core, and the winding position of the coil is (turning distribution) is limited,
This has the disadvantage that it is difficult to arbitrarily obtain a winding distribution that will provide a desired deflection magnetic field.

The present invention relates to a deflection yoke aimed at eliminating the above-mentioned drawbacks, and in particular, the present invention relates to a deflection yoke that has a configuration in which a winding distribution can be arbitrarily obtained to obtain a desired deflection magnetic field distribution. This relates to a deflection yoke formed by winding a deflection coil in a hollow shape on the inner surface of the deflection yoke.

Hereinafter, one embodiment of the deflection yoke of the present invention will be described in detail with reference to the drawings. In Figures 1 and 2,
Reference numeral 1 denotes a morning glory-shaped core made of a magnetic material, and a plurality of approximately Y-shaped grooves 2 are formed along the ridgeline of the inner surface of the core 1 in the circumferential direction of the inner surface of the core 1 from the rear end 1a to the front end 1b. located along the The kerf 2 is the third
As shown in FIG. 4, the rear end 1a of the inner surface of the core 1
A plurality of jetties 3 continuously extending from to the front end 1b
It is formed into a substantially Y-shape by a dividing piece 4 formed approximately in the middle between the jetties 3 on the front end 1b side of the inner surface of the core 1, and by providing the dividing piece 4,
The number of kerfs 2 at the front end 1b is twice the number at the rear end 1a. Reference numeral 5 denotes a horizontal deflection coil which is inserted into a substantially Y-shaped cut groove 2 formed on the inner surface of the core 1 and wound around the inner surface of the core 1 in a saddle shape. After passing through the groove 2, depending on the required winding distribution, the front end 1b of the core 1 is divided into one or both of the two grooves 2 divided by the dividing piece 4 into a saddle shape. It is something that is rolled up.

In one embodiment of the deflection yoke of the present invention,
We have described only the horizontal deflection coil that constitutes the deflection yoke, which is wound in a hollow shape on the inner surface of the core through a roughly Y-shaped cut groove, but the vertical deflection coil is similarly wound on the inner surface of the core in a hollow shape. The vertical deflection coil may be rotated, and the winding shape of the vertical deflection coil can be arbitrarily set as necessary.

As described above, according to the deflection yoke of the present invention, a plurality of roughly Y-shaped cut grooves are provided in the inner circumferential direction of the core from the rear end to the front end, and at least the horizontal deflection coil is cut with the cut grooves at the rear end. The coil is inserted from one kerf into one or two kerfs at the front end and wound around the inner surface of the core in a saddle shape, and the winding distribution of the coil at the front and rear ends of the core is changed. When performing convergence adjustment or focus adjustment by changing the magnetic field distribution, it is possible to form a winding distribution that will obtain a desired deflection magnetic field. In addition, by making the cut groove roughly Y-shaped from the rear end to the front end, the front end of the coil can be separated as necessary during winding, simplifying the winding work. In addition, since the winding position of the deflection coil is precisely defined, it is particularly effective as a highly sensitive deflection yoke.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional side view of one embodiment of the deflection yoke of the present invention, FIG. 2 is a perspective view of the structure, and FIG.
This figure is a front view of the core, and FIG. 4 is a perspective view of a main part of the inner surface of the core. 1...core, 1a...core rear end, 1b...core front end, 2...approximately Y-shaped groove, 5...horizontal deflection coil.

Claims (1)

[Scope of utility model registration request] Approximately Y from the rear end to the front end in the inner circumferential direction of the core
A plurality of letter-shaped cut grooves are provided, and at least a horizontal deflection coil is inserted from one cut groove at the rear end into one or two cut grooves at the front end and wound around the core in a saddle shape. A deflection yoke featuring