JPS5841637Y2 - deflection yoke - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an assembly structure of a deflection yoke for a television.

Recently, convergenceless cathode ray tubes have been adopted as cathode ray tubes for televisions.

In the convergenceless deflection yoke used in this convergenceless cathode ray tube, if the vertical deflection coil and the ferrite core are not positioned uniformly over the entire circumference, variations in misconvergence will occur.

However, in conventional convergence-less deflection yokes, it is difficult to arrange the vertical deflection coil and ferrite core uniformly over the entire circumference of the deflection yoke due to dimensional tolerances of the ferrite core. there were.

The object of the present invention is to provide a convergenceless deflection yoke assembly structure that solves the above-mentioned drawbacks.

An embodiment of this invention will be described based on the drawings.

Figure 1 shows an exploded view of the vertical deflection coil arrangement part of this convergenceless deflection yoke.The deflection coil bobbin 1, on which the horizontal deflection coil is wound and mounted on the inner surface, is inserted into the funnel-shaped part at the back of the cathode ray tube. A funnel-shaped portion 2 without a tail flange portion is provided, and a flange portion 3 is provided at the tip of the funnel-shaped portion 2, and a ring 30 is provided on the back surface of the flange portion 3.
Projections 5 and 6 that are inserted into the small JLs 33 and 34 are arranged, and a large diameter cylinder part 4 is arranged on the outer peripheral edge of the collar part 3 so as to be continuous with the collar part 3. A horizontal deflection coil (not shown) is disposed on the inner peripheral surface of the portion 4 and the funnel-shaped portion 2.

A rear portion 11 without a tail flange of a vertical deflection coil 10 is disposed on the outer peripheral surface of the funnel-shaped portion 2 of the deflection coil bobbin 1, and a front portion 12 of the vertical deflection coil 10 is in contact with the collar portion 3 of the deflection coil bobbin 1. It will be arranged as follows.

A funnel-shaped portion 21 of a ferrite core 20 is inserted into the outer peripheral surface of the rear portion 11 of the vertical deflection coil 10, and a large diameter portion at the tip of the ferrite core 20 is disposed on the back surface of the front portion 12 of the vertical deflection coil 10. 22 are disposed in contact with each other.

A ring 30 is provided to fix the vertical deflection coil 10 and the ferrite core 20 to the deflection coil bobbin 1.
This ring 30 is provided with a flange 31 for pressing and fixing the front part 12 of the vertical deflection coil 10.
A tapered pressing portion 32 is provided in series with the ferrite core 20 in order to press and fix the large diameter portion 22 of the tip of the ferrite core 20.
Furthermore, in order to position the ring 30 with respect to the deflection coil bobbin 1, small holes 33 and 34 are inserted into the ring 30, and the small holes 33 and 34 are inserted into the protrusions 5 and 6 provided upright on the collar 3 of the deflection coil bobbin 1.
It is perforated in the flange part 31 of.

Next, based on FIG. 2, the assembled state of the vertical deflection coil of this convergenceless deflection yoke will be described.

The front part 12 of the vertical deflection coil 10 is disposed on the back surface of the collar part 3 of the deflection coil bobbin 1.
2 is pressed and fixed over the entire circumference by the flange 31 of the ring 30, and the large diameter portion 22 at the tip of the ferrite core 20 inserted and disposed in this vertical deflection coil is the tapered pressing portion of the ring 30. 32 to press and fix the ring 30 over the entire circumference, and the small holes 33 and 34 of the ring 30 are inserted into the protrusions 5 and 6 provided upright on the flange 3 of the deflection coil bobbin 1, and the ring 3
The flange 31 of 0 is fixed by heat welding or adhesive 40.

This invention is based on the above-described embodiments and is configured as claimed in the utility model registration, in which a vertical deflection coil and a ferrite core disposed on a deflection coil bobbin are completely integrated in a convergence-less deflection yoke. Since it is now possible to arrange the deflection yoke uniformly over the circumference, it is possible to obtain good convergence, and it is possible to provide a convergence-less deflection yoke that has good characteristics with reduced variation. It became.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a vertical deflection coil portion of a convergence-less deflection yoke according to an embodiment of the present invention;
FIG. 2 shows a partial sectional view of the fixed portion of the deflection yoke. 1~Deflection coil bobbin, 2.21~Funnel shaped part, 3゜31
~Flame part, 4~Large diameter cylindrical part, 5, 6~Protrusion, 10~Vertical deflection coil, 11~Rear part, 12~Front part, 20~Ferrite core, 22~Tip large diameter part, 30~Ring, 32~ Pressing part, 33°34~small hole.

Claims (1)

[Scope of utility model registration request] In the deflection yoke, a protrusion is provided on the flange of a deflection coil bobbin equipped with a horizontal deflection coil, and the vertical deflection coil and ferrite core are fixed by a ring provided with a small hole that is inserted into the protrusion. Features a deflection yoke.