JPH07296741A - Deflection yoke - Google Patents

Abstract

PURPOSE:To facilitate setting of the magnetic field centers of horizontal magnetic field and vertical magnetic field mechanically even if there is unevermess in core sizes. CONSTITUTION:A deflection yoke is provided with a horizontal coil 1 formed by winding a copper wire around an insulation frame 5 which has a wire wound rib part 5a at its side face, vertical coils 2 formed by winding copper wires around cores 7, and insulation pieces 6 for insulating copper wires which are wound around the wire wound rib part 5a and the elastic arm parts 6a are formed on the insulation pieces 6. When the vertical coils 2 are attached to the horizontal coil 1, the arm parts 6a are pressed against the insulation frame 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke installed in a cathode ray tube (hereinafter referred to as CRT) of a television receiver or the like.

[0002]

2. Description of the Related Art As shown in Japanese Unexamined Patent Publication (Kokai) No. 4-332439, there is a deflection yoke in which a vertical coil is positioned and attached to an insulating frame to reduce variations in convergence quality. Further, in recent years, in order to obtain the desired performance, there is an increasing number of deflection yokes having a winding rib portion on the side surface of the insulating frame and a horizontal coil having an increased number of windings on the electron gun side.

Conventionally, a deflection yoke of this type generally has a structure as shown in FIGS. As shown in the figure, the deflection yoke main body is roughly divided into a horizontal coil 1 and a vertical coil 2. The horizontal coil 1 is formed by winding a copper wire around an insulating frame 5, and a winding rib portion 5a is provided on a side surface of the insulating frame 5. It is provided. An insulating piece 10 for insulation is attached to the winding rib portion 5a. The vertical coil 2 includes a core 7, an upper core ring 8 and a lower core ring 9 attached to the core 7.
It is a copper wire wrapped from above. In addition, a large cover 3 and a small cover 4 are also used. The vertical coil 2 is mounted on the horizontal coil 1 as shown in FIG.

In the above structure, when the deflection yoke is operated, the electron beam emitted from the electron gun of the CRT receives the magnetic force in the horizontal direction by the horizontal coil 1 and in the vertical direction by the vertical coil 2 and is deflected. The copper wire of the horizontal coil 1 returns from the neck portion of the insulating frame 5 to the neck portion through the opening portion, and from the neck portion to the winding rib portion 5.
There are two methods for returning to the neck through a. The horizontal coil 1 can obtain the desired performance by changing the strength of the neck magnetic field and the strength of the opening magnetic field by properly using the two methods.

[0005]

In the conventional vertical coil 2 of the deflection yoke as described above, it is difficult to obtain the dimensional accuracy of the core 7, and therefore, the dimensional tolerance is large, and the design dimension of the insulating frame 5 is the dimension of the core 7. Since the size is such that it can be mounted even if it becomes the maximum within the dimensional tolerance, when the size of the core 7 was actually completed near the center of the dimensional tolerance, there was great rattling when mounted on the horizontal coil 1. Therefore, the centers of the horizontal magnetic field, which is important for the deflection yoke, and the horizontal coil 1 and the vertical coil 2, which are related to the orthogonality of the vertical magnetic field, do not easily become the same.

An object of the present invention is to solve the above problems, and an object thereof is to provide a deflection yoke in which the magnetic field centers of the horizontal magnetic field and the vertical magnetic field can be mechanically aligned even if the core dimensions vary.

[0007]

In order to achieve the above object, the present invention has a horizontal coil in which a copper wire is wound around an insulating frame having a winding rib portion on a side surface and a vertical coil in which a copper wire is wound around a core. And an insulating piece for insulating the copper wire wound around the winding rib portion, the elastic piece is formed on the insulating piece, and when the vertical coil is attached to the horizontal coil, the arm portion serves as an insulating frame. It is configured to be pressed.

[0008]

According to the present invention, in the above structure, the center of the vertical coil and the center of the horizontal coil can be mechanically aligned by pressing the arm portion formed on the insulating piece against the core.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same numbers are used for the same components as those described in the conventional example.

As shown in the figure, the deflection yoke main body comprises a horizontal coil 1, a vertical coil 2 and other large covers 3 and small covers 4, and the horizontal coil 1 has an insulating frame having winding rib portions 5a on its side surfaces. A copper wire is wound around 5, and two insulating pieces 6 are attached on the winding rib portion 5a for insulation from the vertical coil 2. The vertical coil 2 has an upper core ring 8 and a lower core ring 9 attached to a core 7,
A copper wire is wound on it. The insulating piece 6 is provided with an elastic arm portion 6a, and the arm portion 6a has a shape that reliably presses against the inner surface of the core 7 even when the size of the core 7 is maximum within the dimensional tolerance.

The operation of the above structure will be described. The vertical coil 2 having a two-divided shape slides from the lateral direction.
It is mounted on the insulating frame 5 of the horizontal coil 1, and at that time, the arm portion 6 a is pressed against the inner surface of the core 7. Since the arm portion 6a is pressed against the inner surface of the core 7 with a uniform force in two directions, the centers of the horizontal coil 1 and the vertical coil 2 can be made to be the same.

As described above, the insulating piece 6 according to the embodiment of the present invention.
According to the above, since the arm portion 6a hits the inner surface of the core 7 from two directions with an equal force, the centers of the horizontal coil 1 and the vertical coil 2 can be mechanically aligned with each other, which reduces variations in assembly and improves performance and quality. It is possible to make a stable deflection yoke.

[0013]

As is apparent from the above description, according to the present invention, the insulating piece is provided with the arm portion that can be pressed against the inner surface of the core. The center can be aligned, performance
A deflection yoke with stable quality can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a deflection yoke according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing the internal structure of the same.

FIG. 3 is an exploded perspective view of a conventional deflection yoke.

FIG. 4 is a side sectional view showing the internal structure of the same.

[Explanation of symbols]

 1 Horizontal coil 2 Vertical coil 5 Insulation frame 5a Winding rib part 6 Insulation piece 6a Arm part 7 Core

Claims (1)

[Claims] 1. A horizontal coil in which a copper wire is wound around an insulating frame having a winding rib portion on a side surface, a vertical coil in which a copper wire is wound around a core, and a copper wire wound around a winding rib portion for insulation. A deflection yoke, comprising: the insulating piece, wherein an elastic arm portion is formed on the insulating piece, and when the vertical coil is attached to the horizontal coil, the arm portion is pressed against the insulating frame.