JP2002164003A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive deflection yoke capable of surely fixing a magnetic substance core to a coil separator and improved in assembly workability. SOLUTION: This deflection yoke is provided with a horizontal deflection coil, a vertical deflection coil 7, a magnetic substance core 6, a coil separator 5 and a circular rear cover 1, and mounted to a color cathode-ray tube. The deflection yoke is so structured that plural elastic T-shaped projections 3 each having a taper 8 on the top side, an elastic tongue piece 2 on the middle part and a hole 4 on the bottom side are formed on the rear cover 1, and the magnetic substance core 6 is fixed to the coil separator 5 by the T-shaped projections 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke mounted on a color cathode ray tube such as a television receiver or a computer display. The present invention relates to a deflection yoke from which characteristics can be obtained.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a deflection yoke having a bendless type horizontal deflection coil and a vertical deflection coil. This deflection yoke has a horizontal deflection coil (not shown) mounted on the inner peripheral surface of the coil separator 5,
A vertical deflection coil 7 is mounted on the outer peripheral surface. An annular integrated magnetic core 6 inserted from the small diameter side of the coil separator 5 is mounted on the outer periphery of the vertical deflection coil 7, and a circular rear cover 1A as shown in FIG. The configuration is fixed to. The rear cover 1A is provided with four elastic projections 3A having a taper 8 on the top side radially from the center. When the magnetic core 6 is inserted into the rear cover 1A, the elastic projections 3A move outward. Opening functions to hold and fix the magnetic core 6 to the coil separator 5. That is, as shown in FIG. 6, the magnetic core 6 is attached to the rear cover 1.
When the projection 3A is inserted into A, an oblique elastic force F1 is generated so that the generated projection 3A tends to return to the inside. Therefore, if this elastic force F1 is used, the magnetic core 6 is pressed from the upper surface side by a small vector force Fy1 in the Y-axis direction, and is pushed into the center side of the deflection yoke by the vector force Fx1 in the X-axis direction, and the coil separator 5 is fixed. Although not described in detail, the rear cover 1A is fixed to the coil separator 5 with a fastener or the like.

[0003]

When assembling the deflection yoke, if the vector force Fy1 in the Y-axis direction for pressing the magnetic core 6 from the upper surface side is increased, the rear cover 1A itself is greatly deformed. , Acover 1A
However, there is a problem in that the accuracy of the attachment position of the accessory parts mounted on the camera or the magnetic material for distortion correction is deteriorated, which adversely affects the correction characteristics. In addition, the elastic force of the projection 3A to return to the inside increases, and the magnetic core 6 is attached to the rear cover 1A.
However, there is a problem that it is difficult to insert the device into the device and that the assembling workability is reduced.

Accordingly, an object of the present invention is to provide an inexpensive deflection yoke which can securely fix a magnetic core to a coil separator by simple means and has improved assembling workability.

[0005]

According to a first aspect, the present invention provides a color cathode ray comprising a horizontal deflection coil, a vertical deflection coil 2, a magnetic core 6, a coil separator 5, and a circular rear cover 1. A deflection yoke mounted on a tube, wherein the rear cover 1 has a taper 8,
Elastic T with an elastic tongue at the middle and a hole 4 at the bottom
A deflection yoke characterized in that a plurality of U-shaped protrusions 3 are provided, and the magnetic core 6 is fixed to the coil separator 5 by the T-shaped protrusions 3. In the deflection yoke according to the first aspect, when the magnetic core 6 is inserted into the rear cover 1 and a force Fy is applied to the elastic tongue 2 as shown in FIG. And functions to push the magnetic core 6 toward the center of the deflection yoke. At the same time, a repulsive force against the force Fy is generated in the elastic tongue 2 and functions to press the magnetic core 6 from above. As a result,
Even if the force Fy is slight, the magnetic core 6 is replaced with the coil separator 5
In addition to the above, the deformation of the rear cover 1 itself is greatly reduced by the elastic tongue 2, so that there is no adverse effect on the accessories mounted on the rear cover 1, the magnetic material for distortion correction, and the like.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. Note that the present invention is not limited by this.

First Embodiment FIG. 1 is an explanatory view of a rear cover 1 used in a deflection yoke according to a first embodiment of the present invention. FIG. 1A is a perspective view showing the configuration thereof, and FIG. FIG. 2B is a cross-sectional view of a main part of FIG.
FIG. 2 is an explanatory diagram showing the function of the rear cover, and FIG. 3 is an explanatory diagram of the rear cover with a magnetic core inserted. In the drawing, reference numeral 1 denotes a rear cover formed by molding an insulating resin, which is a feature of the deflection yoke according to the present invention, and has a hole 4 at the bottom side on the contact surface side with the magnetic core 6, and an elastic portion at the middle. On the top side, four tongue pieces 2 are provided with four elastic T-shaped protrusions 3 having a taper 8 radially from the center of the rear cover 1. In the center of the rear cover 1, a hole 4A that fits with the coil separator 5 is provided.

By assembling the deflection yoke using the rear cover 1 having such a configuration, the magnetic core 6 is attached to the rear cover 1.
3, the resilient tongue 2 generates a repulsive force Fy2 in the Y-axis direction of the rear cover 1 on the elastic tongue 2 to press the magnetic core 6 from the upper surface side to the front side of the coil separator 5. As shown in FIG. At the same time, a force Fx2 in the X-axis direction is generated on the entire T-shaped projection 3 to press the magnetic core toward the center of the deflection yoke. As a result, the magnetic core 6 is securely fixed to the coil separator 5 with a small force. Further, the rear cover 1 itself is not deformed, and there is no adverse effect on the attached parts and the magnetic material for distortion correction mounted on the rear cover 1, so that uniform characteristics can be obtained and an inexpensive deflection yoke excellent in assembling workability can be obtained. Can be

[0009]

According to the deflection yoke of the present invention, the magnetic core can be easily fixed to the coil separator by simple means, and the assembling workability is greatly improved. In addition, the deformation of the rear cover does not adversely affect the mounted components and the like, and an inexpensive deflection yoke with uniform characteristics can be obtained. The practical effect is large.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views of a rear cover used in a deflection yoke according to a first embodiment of the present invention. FIG. 1A is a perspective view showing the configuration, and FIG. It is principal part sectional drawing.

FIG. 2 is an explanatory diagram showing functions of a rear cover.

FIG. 3 is an explanatory diagram of a rear cover in which a magnetic core is inserted.

FIG. 4 is a perspective view showing a configuration of a deflection yoke.

FIG. 5 is a perspective view of a main part in a conventional example.

FIG. 6 is an explanatory diagram showing a function of a rear cover in a conventional example.

[Explanation of symbols]

 1,1A rear cover 2 elastic tongue 3 T-shaped projection 3A projection 4 hole 4A hole 5 coil separator 6 magnetic core 7 vertical deflection coil 8 taper

Claims (1)

[Claims] 1. A horizontal deflection coil and a vertical deflection coil
And a magnetic yoke, a magnetic core 6, a coil separator 5, and a circular rear cover 1. The deflection yoke is mounted on a color cathode ray tube. The rear cover 1 has a taper 8 on the top side and an elastic part on the middle. A plurality of elastic T-shaped projections 3 having a tongue piece 2 and a hole 4 on the bottom side are provided.
The deflection yoke is configured to be fixed to the coil separator 5.