JPH0142289Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a cylindrical coil core with a permanent magnet at least one end, and the coil is connected to the core by a coil having a connecting wire connected to a connecting pin located near the end of the core. This invention relates to a linearity correction device for a television receiver formed so as to surround the same.

Known linearity correction devices usually have a coil core, a permanent magnet provided at each of the two ends of the coil core, and a connecting pin fixed to each other, and also function as a rotatable third permanent magnet holder. The large number of components required has led to a significant increase in the manufacturing cost of this type of device.

An object of the present invention is to provide a linearity correction device that can be easily and inexpensively manufactured by making it possible to assemble this type of device with a smaller number of component parts.

This object can be achieved by fixing the connecting pin to a permanent magnet so that a synthetic resin support for the connecting pin can be omitted.

Experiments have confirmed that if the magnets on which the connecting pins are arranged are properly magnetized, it is possible to omit the rotatable magnet for finely adjusting the magnetic field in the coil core; It is also possible to omit the magnet at the other end of the core without adversely affecting the functionality of the linearity corrector. Also,
A very simple and inexpensive embodiment of the linearity corrector according to the invention uses only a single permanent magnet.

The present invention will be explained below with reference to the drawings.

The linearity correction device shown in the accompanying drawings includes a hollow or holeless cylindrical coil core 1 made of a soft magnetic material, the central part of which is surrounded by a coil 3 having a connecting wire 5. Further, a first permanent magnet 7 is arranged at the lower end of the coil core 1, and a connecting pin 9 is fixed to the permanent magnet 7. The permanent magnet 7 can be formed from a hard magnetic material using, for example, an injection molding process or an extrusion process.
The connecting pins are introduced into the mold before the molding process, and the molding connects them to the magnet 7.
It can also be fixed to the completed magnet 7 by clamping or gluing. For this reason, the coil core 1 is pressed into a recess formed in the magnet 7.

Both ends of the connecting pin 9 are made to protrude from the magnet 7, and the upper end thereof is curved.
For example, by soldering the connecting wire 5 of the coil 3.
is connected to the upper end. Further, the lower end portion is used when the linearity correction device is soldered to a printed wiring board.

Further, at the upper end of the coil core 1, a second permanent magnet 11 that can be manufactured in the same manner as the first permanent magnet 7 is provided.
will be established. Permanent magnets 7 and 11 are magnetized after manufacture. In this case, since the rotatable magnet is omitted, it is not possible to adjust the magnetic field of the coil core 1 after the fact, so it is necessary to magnetize the coil core so that the magnetic field is correct only once. It has previously been confirmed that this can be achieved by providing the first permanent magnet 7 with predetermined axial and radial magnetizations. It has also been found that the second permanent magnet can be omitted for various fields of application.

[Brief explanation of the drawing]

The accompanying drawing is a perspective view showing an embodiment of the linearity correction device of the present invention. 1... Cylindrical coil core, 3... Coil, 5...
... Connection wire, 7, 11 ... Permanent magnet, 9 ... Connection pin.

Claims (1)

[Claims for Utility Model Registration] 1. A connecting wire 5 including a cylindrical coil core 1 with a permanent magnet 7 provided at at least one end, and connected to a connecting pin 9 disposed near the end of the core 1.
A linearity correction device for a television receiver comprising a coil 3 having a coil 3 surrounding the core 1, wherein the connecting pin 9 is fixed to the permanent magnet 7. Linearity corrector. 2. The linearity correction device for a television receiver according to claim 1, which uses only a single permanent magnet 7.