JPH04112583U - Convergence correction device - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a convergence correction device that performs convergence correction of a CRT image, and particularly relates to a structure for fixing a core to a holder.

[Prior Art] Conventionally, convergence correction devices have been used to correct misconvergence in CRT images.

Further, there are known convergence correction devices in which the core is integrated with the deflection yoke and in which the core is formed separately.

FIG. 3 shows a conventional example of a convergence correction device having a separately formed structure.

In this figure, 10 is a holder having a hole 12 in the center for fitting a CRT. Holder 10
Inside, two cores 14 and 16 are arranged. The cores 14 and 16 are made of a magnetic material such as ferrite, and each has a U-shape in this figure.

A bobbin 20 around which a convergence coil 18 is wound is attached to each arm of the cores 14 and 16. The convergence coil 18 includes a horizontal coil that corrects convergence in the horizontal direction, a vertical coil that similarly corrects convergence in the vertical direction, and a static coil that corrects static convergence.

Further shown in this figure are springs 22 and 24 that hold the cores 14 and 16 in the direction of the hole 12. That is, in order to perform convergence correction stably, the cores 14 and 16 must be connected to the CRT.
must be positioned so that it always maintains a prescribed posture. Therefore, the cores 14 and 16 are pressed against the outer wall surface 26 of the hole 12 by the springs 22 and 24.

In this way, conventionally, the spring 22
and 24, the postures of the cores 14 and 16 were fixed.

[Problems to be solved by the invention] However, in the past, the structure was complicated because a spring was required to fix the core.

Further, since it was necessary to attach the spring to the holder, workability during manufacturing was poor.

The present invention was developed with the aim of solving these problems, and it is possible to fix the core without using a spring, has a simple structure, and has good workability during manufacturing. An object of the present invention is to provide a convergence correction device.

[Means for Solving the Problems] In order to achieve such an object, the present invention has a predetermined number of core locking claws protruding from the inner wall of the holder to position the core, and the core is placed in the holder in a predetermined posture. It is characterized by being fixed.

[Operation] In the convergence correction device of the present invention, the core is positioned on the inner wall of the holder by the core locking claw. Thereby, the core is fixed to the holder in a predetermined posture. Therefore, the core can be fixed without using a spring, and this fixation can be performed easily.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

Components similar to those of the conventional example shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 shows the configuration of a convergence correction device according to an embodiment of the present invention.

A feature of the present invention is that a predetermined number (eight in the figure) of core locking claws 30 are protruded from the inner wall surface of the holder 28.

That is, the holder 28 in this embodiment has eight core locking claws 30 on the inner wall surface, as shown in FIG. 2(a).

In this embodiment, the work of fixing the cores 14 and 16 to the holder 28 is performed as follows.

That is, as shown in FIG. 2(b), a printed circuit board 34 provided with a number of through holes 32 at positions corresponding to the core locking claws 30 is mounted on the holder 28. This printed circuit board 34 is a wiring board for connecting convergence coils. After this, as shown in FIG. 2(c), the cores 14 and 16 having a U-shape are
is attached to the holder 28. A bobbin 20 having a shape as shown in FIG. 2(d) is attached to each arm of the cores 14 and 16 in advance. Horizontal, vertical and static coils are wound on the bobbin 20, but are omitted in this figure for the sake of brevity.

The core locking claw 30 is inserted into the through hole 32 of the printed circuit board 34 and locks the cores 14 and 16. That is, by locking the core locking claw 30, the cores 14 and 16 are fixed to the holder 28 in a predetermined posture.

In this way, in this embodiment, the cores 14 and 16 are fixed to the holder 28 without using a spring. At this time, the core locking claw 30
By providing these in the vertical and horizontal directions in FIG. 1, the cores 14 and 16 are locked in the X, Y, and Z directions in FIG. 1, respectively, and the cores 14 and 16 are prevented from wobbling. Become.

Note that in this embodiment, the cores 14 and 16
Although the E-shaped core was used, a U-shaped core may also be used. Further, the wiring between the convergence coils may be performed without using the printed circuit board 34, and in that case, the protruding height of the core locking claw 30 may be lowered by the thickness of the printed circuit board 34. In addition, the first
In the figure, 36, 38, and 40 are 2-, 4-, and 6-pole plastic magnets.

[Effects of the invention] As explained above, according to the invention, since the core is fixed in a predetermined posture by the core locking claw provided on the holder, the core can be fixed without using a spring, and the configuration is improved. Effects such as simplification and improved workability during manufacturing can be obtained.

[Brief Description of the Drawings] Fig. 1 is a perspective external view showing the configuration of a convergence correction device according to an embodiment of the present invention, and Fig. 2 is a perspective external view showing the configuration of parts constituting this embodiment. FIG. 2a shows the holder, FIG. 2b shows the printed circuit board, FIG. 2c shows the core, FIG. 2d shows the bobbin, and FIG. FIG. 2 is a front view showing an example of the configuration of a conventional convergence correction device. 12...CRT fitting hole, 14, 16...core, 18...convergence coil, 20...bobbin, 28...holder, 30...core locking claw.

Claims (1)

[Claims for Utility Model Registration] The CRT is equipped with a core around which a convergence coil is wound, and a holder that houses the core and is fitted into the neck of a CRT. In a convergence correction device that supplies a convergence correction magnetic field to the inside and performs convergence correction of a CRT image, a predetermined number of core locking claws for positioning the core are protruded from the inner wall of the holder, and the core is fixed to the holder in a predetermined posture. A convergence correction device characterized by: