JPH0127253Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a deflection yoke for television receivers, etc. In particular, by integrating the magnetic field forming magnetic piece of the deflection yoke and the core clip, the number of parts can be reduced and the magnetic field forming characteristics can be stabilized. It was designed to make the

As shown in FIG. 1, a conventional deflection yoke includes a toroidal vertical deflection coil 1 provided on a funnel-shaped core, and a saddle-shaped horizontal deflection coil 3 disposed on the inner peripheral surface of the core with a separator 2 interposed therebetween. For example, on the front fringe of the core,
Field-forming magnetic pieces (referred to as cross arms) 4a and 4b made of silicon steel plates are provided. These magnetic pieces 4a, 4b each include arms 5a, 5b and 5c, which are arranged at a predetermined interval on the fringe part.
5d integrally.

The magnetic pieces 4a and 4b reduce pincushion distortion and the like by correcting the magnetic field in the tube axis direction at the fringe portion.

The magnetic piece 4a is attached by fixing to the separator 2 with a screw 6 a mounting piece extending from the connecting portion of the pair of arms 5a, 5b, as shown in FIG. 2A. Although not shown, the magnetic piece 4b is attached in the same manner. Furthermore, grooves 8a and 8b are provided near the area where one half 7a and the other half 7b of the core join, and these grooves 8
A locking core clip 9 is engaged with a and 8b,
Its elasticity maintains the bonded state of the core.

The conventional deflection yoke described above has magnetic pieces 4a, 4
In addition, in order to attach the magnetic pieces 4a and 4b to the separator 2, one half 7a and the other half of the core are required, as shown in FIG. 2B. 7b and magnetic piece 4a,
The gap g between the vertical deflection coil 1 and the vertical deflection coil 1 varies depending on the variation in the diameters of the one half 7a and the other half 7b of the core. There was a drawback that variations occurred.

This invention eliminates the above-mentioned drawbacks of conventional deflection yokes.

An embodiment of this invention will be described below with reference to FIG. In this example, one half 7 of the core is connected to the connecting portion of the arms 5a and 5b of the magnetic piece 4a.
A support piece 10 is bent along the slope of the outer circumferential surface of the half part a and the other half part 7b, and is integrally protruded, and a clip part 11 is formed at the tip of the support piece 10. This clip portion 11 is
The clamping pieces are positioned in grooves 8a and 8b provided in one half 7a and the other half 7b of the core, respectively. Although not shown, the other magnetic piece 4b also has a similar shape.

As is clear from this embodiment, according to this invention, the clip portion 1 is integrated with the magnetic pieces 4a and 4b.
1, the structure can be constructed with fewer parts than the conventional one. Also, since a magnetic piece is not attached to separator 2, the third
As is clear from Figure B, one half 7a of the core
and the fringe portion of the other half 7b and the magnetic piece 4a,
4b can be brought into close contact with the core, and it is possible to prevent the way the vertical deflection coil 1 picks up the magnetic flux from changing due to variations in the diameters of one half 7a and the other half 7b of the core, and the characteristics It is possible to prevent variations in

Further, FIGS. 4 and 5 respectively show other embodiments of this invention.

In the example shown in FIG. 4, a magnetic piece 4a' is provided on the rear fringe portions of one half 7a and the other half 7b of the core (a similar magnetic piece is also provided on the other side of the rear fringe, not shown). This is a case where this invention is applied to a deflection yoke that is provided with a magnetic piece 4
A' is integrally provided with a clip part 11 via a support piece 10, and the clip part 11 is inserted into grooves 8a and 8b formed in one half part 7a and the other half part 7b of the core, respectively. be done.

Furthermore, in the example shown in FIG. 5, the clip portion 11 is provided integrally with the magnetic piece 4a, and the fringe portions of one half portion 7a and the other half portion 7b of the core are provided with
Protrusions 12a and 12b are provided at the mutual joint portions, and the magnetic piece 4a is attached by holding both of the protrusions 12a and 12b with the clip portion 11. Furthermore, in order to more firmly maintain the bonded state of the core, grooves 8a,
Core clip 9 is inserted into 8b.

It is clear that the other examples shown in FIGS. 4 and 5 also provide the same effects as described above.

[Brief explanation of the drawing]

Figure 1 is an overall perspective view of a conventional deflection yoke to which this invention can be applied, Figure 2 is a partial perspective view and partial sectional view of a conventional deflection yoke, and Figure 3 is a diagram of a deflection yoke according to this invention. A partial perspective view and a partial sectional view of one example, and FIGS. 4 and 5 are partial perspective views of other examples of the deflection yoke according to the present invention, respectively. 1 is a vertical deflection coil, 2 is a separator, 3 is a horizontal deflection coil, 4a and 4b are magnetic field forming magnetic pieces, 7
a, 7b are one half and the other half of the core, 8
a, 8b are grooves, 11 is a clip portion, 12a, 12
b is a protrusion.

Claims (1)

[Claims for Utility Model Registration] A magnetic field-forming magnetic piece located at the fringe portion of a core consisting of a pair of halves; a locking groove or protrusion provided in each of the half part and the other half; and a locking groove or protrusion formed integrally with the magnetic field forming magnetic piece, and provided in the groove or protrusion of the one half part and the other half part. A deflection yoke comprising: a clip portion that engages in a pinching manner to maintain a joined state between the one half portion and the other half portion.