JPH0447650A - Deflection yoke - Google Patents

Abstract

PURPOSE:To affect sufficiently the electron beam in a cathode-ray tube by an electric cable in the center, by forming the bottom plane of the center of an insulating frame into a structure of rising toward the cathode-ray tube. CONSTITUTION:An insulating frame has a part rising toward a cathode-ray tube in the bottom of the center. A part which rises or a rising part 3, is formed. An electric cable 4 thus comes close to the cathode-ray tube by the height of the rising part 3 and comes up to electron beam. An extruding part extruded in the inner periphery of a core 5 is formed. The extruding part is so formed as to be fitted with a recessed part formed in the back side of the rising part 3 of the insulating frame and owing to this structure, a part of the core 5 comes near to the electron beam. By fitting the extruding part of the core 5 in the recessed part of the insulating frame, the core 5 and the insulating frame are positioned each other and thus unevenness of properties is suppressed.

Description

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

Among conventional deflection yokes, there is one called split winding, in which the saddle type horizontal deflection coil is wound in multiple slots in order to obtain a highly accurate winding distribution. As shown in Figure 6, an insulating frame is used that has a wire guide wall to partition each slot.This wire guide wall (as shown in Figure 7, the part on the open end side and the part on the neck end side) is used. Generally, it is provided only in

In other words, since the wires in each slot are almost straight in the center, a guide wall is necessary to separate each slot. In this case, the bundle of wires in each slot may spread out and the adjacent wires may intersect with each other, resulting in the vertical thickness d of each wire bundle becoming smaller. If we look at this, the electric wire is now farther away from the cathode ray tube, and the influence of the magnetic field from the electric wire in the center of the tube on the electron beam becomes smaller.
If a wire guide wall is also provided in the center part, then in the winding process, the wire guide member of the winding machine may come into contact with the wire guide wall provided in the center part. This invention was made in view of the second problem, and the object is to provide a deflection yoke in which the central electric wire can sufficiently influence the electron beam inside the cathode ray tube.

Means for Solving the Problems The present invention solves the above problems.The bottom surface of the central part of the insulating frame is raised so as to approach the cathode ray tube. At the center, the electric wire approaches the electron beam by the amount that the insulating frame is raised.

Example The embodiments of the deflection yoke of the present invention will be described above.

FIG. 1 is a sectional view showing the structure of the insulating frame of the deflection yoke in this embodiment. Reference numeral 1 indicates a wire guide wall provided at the opening end side.2 indicates an electrical wire guide wall provided at the neck end side. The insulating frame has a raised part on the bottom of the central part that approaches the cathode ray tube. 3 is a raised portion, that is, a raised portion.

Figure 2 shows the state in which wires are wound around the same insulating frame. 4 are wires that make up a bundled coil. moves closer to the cathode ray tube and approaches the electron beam.

Fig. 3 (Friend) A perspective view showing the structure of the core of the deflection yoke in this embodiment @ Fig. 4 is a sectional view of the core mounted on an insulating frame. 5 is the core, and 6 is the inner circumference of the core 5. It is a protrusion provided on the .

The protruding portion 6 is adapted to fit into a recess formed on the back side of the raised portion 3 of the insulating frame, and this configuration allows a portion of the core 5 to approach the electron beam.

Further, as shown in FIG. 2, by fitting the protrusion 6 of the core 5 into the recess of the insulating frame, the core 5 and the insulating frame are positioned relative to each other, and variations in characteristics can be suppressed.

According to the present invention (as described in "Effects of the Invention"), the bottom surface of the central part of the insulating frame is raised so as to approach the cathode ray tube. Therefore, even if there is no wire guide wall in the center, the bundle of wires in each slot will spread out\ Even if the vertical thickness d of each wire bundle becomes smaller, the insulation will be reduced accordingly. This is corrected by the swell of the frame, and it is possible to prevent the electric wire from moving away from the electron beam at the center, without reducing the influence of the magnetic field of this electric wire on the electron beam.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the configuration of the insulating frame of the deflection yoke in this embodiment. Fig. 2 is a cross-sectional view showing the state in which the insulating frame is wound. Fig. 3 is a cross-sectional view showing the structure of the insulation frame of the deflection yoke in this embodiment. Fig. 4 is a cross-sectional view showing the structure of the same core mounted on an insulating frame. Fig. 5 is a cross-sectional view showing the same core being mounted on an insulating frame. Fig. 6 is a cross-sectional view of the conventional deflection yoke. Perspective view showing the frame @ Fig. 7 is a perspective view of the main part of the insulating frame Fig. 8 is a perspective view of the I part showing the state where the winding is applied to the insulating frame Fig. 9 (a) is the end of the insulating frame Figure 9 (b)
is a sectional view of the central part of the same insulating frame. ■, 2: Wire guide wall 4: Wire 6: Protrusion protrusion core

Claims (1)

[Claims] In a deflection yoke in which a deflection coil is wound in slots around a winding frame, the insulating frame is provided with wire guide walls for partitioning each slot only at the open end side portion and the neck end side portion, A deflection yoke characterized in that a central part where a wire guide wall is not provided has a raised part so as to approach a cathode ray tube.