JPS5854774Y2 - Deflection yoke device - Google Patents

Description

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

Recently, as a deflection yoke mounted on a cathode ray tube, a magnetic piece is attached to the outside of the flange of the bobbin at the head of the deflection yoke using adhesive tape or adhesive. A device has been developed that locally changes the deflection magnetic field distribution to eliminate concentration errors that occur at the corners of the screen surface of a cathode ray tube, thereby eliminating the need for dynamic convergence correction.

However, in a deflection yoke with such a configuration, the magnetic piece is fixed to the bobbin using adhesive tape or adhesive, so when the deflection yoke is moved alone, the magnetic piece may shift from the fixed position. Also, since the magnetic piece is placed outside the flange of the bobbin, it is separated from the horizontal deflection coil by the bobbin, which reduces its influence on the horizontal deflection coil's magnetic field. death,
Furthermore, it has various drawbacks, such as the possibility that the magnetic piece may come into contact with the core, vertical deflection coil, etc. and adversely affect the magnetic field distribution.

The present invention relates to a deflection yoke device developed in view of the above matters, and in particular, a plurality of pockets are provided symmetrically corresponding to the winding positions of the horizontal deflection coil on the inner surface of the enlarged head portion of the bobbin, and a magnetic piece is provided in the pocket. The present invention provides a deflection yoke device in which a horizontal deflection coil is housed, and the entrance of the pocket is closed using a part of a horizontal deflection coil.

Hereinafter, one embodiment of the deflection yoke device of the present invention will be described in detail with reference to the drawings.

In Fig. 1, 1 is a deflection yoke, and a core 2 and
It is composed of a vertical deflection coil 3 wound in a toroidal shape on the outer peripheral surface of the core 2, and a horizontal deflection coil 5 wound in a saddle shape on the inner surface of the core 2 via a bobbin 4. It is attached and fixed on top.

As shown in FIG. 2, the bobbin 4 of the deflection yoke 1 has a tube axis attached to the inner surface 12 of the flange portion 11 on which the head crossover portion 8 of the horizontal deflection coil 5 formed in the head opening 10 is disposed. Pockets (17.18, 19.20) having inlets 13, 14, 15.16 open in the direction are formed.

Pockets I-17, 18, 19, and 20 correspond to the winding position of the horizontal deflection coil 5, and are relative to the dividing line 4A of the bobbin 4, that is, the horizontal axis X when the deflection yoke 1 is attached to the cathode ray tube 6. It is formed at an angle θ within the range where the winding distribution of the horizontal deflection coil 5 is made, and each pocket 1
7.18 and 19.20 are axially symmetrical positions with respect to the horizontal axis X and the vertical axis Y that is perpendicular to the horizontal axis X.

And in each pocket) 17, 18, 19.20,
The plate-shaped magnetic pieces 21, 22, 23, and 24 shown in FIG. 3 are inserted and stored through the entrances 13, 14, 15, 16.

In the deflection yoke device having such a configuration, the pocket) 17
．． Magnetic pieces 21.22, 23.24 inside 18, 19.20
A horizontal deflection coil 5 is installed on the inner surface of the bobbin 4 while the bobbin 4 is housed, and a vertical deflection coil 3 wound around the core 2 is installed on the outer surface of the bobbin 4, thereby forming the deflection yoke 1.

At this time, the population of pockets 17.18, 19.20 is 13,
14, 15° 16 are blocked by a part of the horizontal deflection coil 5 installed on the inner surface of the bobbin 4, as shown in FIG.
The magnetic pieces 21, 22, 23, 24 stored in the pocket 17. . . . , the deflection yoke 1 does not come off from the deflection yoke 1 and is securely fixed.

As described above, according to the deflection yoke device of the present invention, a plurality of pockets are provided symmetrically corresponding to the winding positions of the horizontal deflection coil on the inner surface of the enlarged head portion of the bobbin, and the magnetic pieces are stored in the pockets. At the same time, the entrance of the pocket is closed using a part of the horizontal deflection coil, so the magnetic piece does not shift its position, and can compensate for the characteristics of the deflection yoke. It is possible to completely prevent the magnetic piece from falling off the deflection yoke by preventing the magnetic piece from being exposed to the outside due to some restrictions, and to prevent the magnetic piece from falling off from the deflection yoke. Since it is not required at all, costs can be reduced.

Also, from the point of view of the influence that the configuration of the deflection yoke device of the present invention has on the deflection magnetic field generated by the deflection coil, it is better to arrange the magnetic pieces on the inner surface of the horizontal deflection coil than on the outer surface of the enlarged head part. In close proximity to the vertical deflection coil, the change in the local magnetic field distribution of the horizontal deflection coil increases, and in addition, the distance of the vertical deflection coil increases without touching the vertical deflection coil and the core, which is caused by the vertical deflection coil. The effect of reducing the influence on the magnetic field can be further improved.

In addition, in the present invention, a magnetic piece is fixed to the outer surface of the enlarged head part of the bobbin, overlapping the magnetic piece stored in the pocket, without contacting the vertical deflection coil and the core to form a deflection yoke. The device may also be configured, and in this case, it is effective when a larger change in the local magnetic field distribution of the horizontal deflection coil is required.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a deflection yoke device according to an embodiment of the present invention, Fig. 2 is a perspective view of a bobbin, Fig. 3 is a perspective view of a magnetic piece, and Fig. 4 is a part of the deflection yoke device. FIG. 1: Deflection yoke, 4: Bobbin, 5: Horizontal deflection coil, 1
0: Enlarged head part, 12: Inner surface, 13, 14, 15, 16
: Pocket entrance, 17.18, 19.20 : Pocket, 21.22, 23.24 : Magnetic piece.

Claims (1)

[Scope of utility model registration request] In a deflection yoke device mounted on a cathode ray tube that includes a horizontal deflection coil wound in a saddle shape on an inner surface of a bobbin, the horizontal deflection coil is wound on an inner surface of an enlarged head portion of the bobbin. A deflection yoke device characterized in that a plurality of pockets are provided symmetrically corresponding to positions, a magnetic piece is housed in the pocket, and an entrance of the pocket is blocked using a part of the horizontal deflection coil. .