JPH06310053A - Deflection yoke for cathode-ray tube - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a deflection yoke for a cathode ray tube in which lead wires of a correction coil are prevented from being a hindrance during assembly or the like. [Structure] Ribs 9 and 10 are formed on the side surface of a front cover 6 for holding a core of a deflection coil.
A conducting wire is wound between 0 to form a coil 7 for correction. The front cover 6 is provided with a terminal plate 12 for connection, and the terminal pin 1
3 and the connector 14 are connected by the wiring pattern 15. A flange portion 11 is provided on one rib 10 of the front cover 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, a color picture tube,
The present invention relates to a deflection yoke for a cathode ray tube used in a display device or the like.

[0002]

2. Description of the Related Art In recent years, user's demand for image quality of display devices and the like has become strict, and therefore, in a cathode ray tube as well, it is desired to minimize the rotation of an image due to the influence of the earth's magnetism. Therefore,
Conventionally, rotation of an image has been suppressed by using an internal or external magnetic shield for preventing mislanding of electron beams. However, the magnetic shield is originally intended to suppress mislanding of the electron beam, and even if these are used, the rotation of the image cannot be completely eliminated. Therefore, conventionally, a coil is provided on, for example, a front cover of a deflection yoke for deflecting an electron beam, and a current is passed through the coil to generate a magnetic field to correct the rotation of an image (for example, JP-A-63-250988, JP-A-60-240
52, Japanese Utility Model Publication No. 3-37743, etc.).

[0003]

However, in the case of such a conventional example, since the lead wire for supplying power to the correction coil extends from the deflection yoke, this lead wire is assembled during assembly or transportation of the deflection yoke. However, there was a problem that the work efficiency was lowered because it became an obstacle.

The present invention has been made in view of the above-mentioned problems of the conventional example, and an object of the present invention is to provide a deflection yoke for a cathode ray tube in which a lead wire of a correction coil is prevented from being a hindrance during assembly or the like. Especially.

[0005]

The present invention is described in, for example, FIG.
As shown in FIG. 7, in the deflection yoke for a cathode ray tube, the front cover 6 for holding the cores of the deflection coils 2 and 3 is provided with the correction coil 7 for correcting the rotation of the image on the display screen. 6 is provided with a printed wiring board 12, and the printed wiring board 12 is provided with a coil terminal 13 electrically connected to the correction coil 7 and a connector 14 for supplying power to the correction coil 7. The coil terminal 13 and the connector 14 are electrically connected. In this case, the front cover 6 may be provided with a protrusion 19 for partitioning the connector 14 and the coil terminal 13. Further, the front cover 6 may be provided with ribs 9 and 10 for forming the correction coil 7, and the flange 11 may be provided at the end of the rib 10. Further, the connector 14 may be provided with an opening through which the contact portions 23 and 24 can be seen. Furthermore, the correction coil 7 can be formed by winding a conductive wire around the outer circumference of the front cover 6.

[0006]

In the present invention having such a configuration, power is supplied to the correction coil 7 via the connector 14 and the coil terminal 13 provided on the front cover 6. Therefore, a lead wire for supplying power does not extend from the deflection yoke DY when the deflection yoke DY is assembled or transported.
Further, by providing the front cover 6 with the projection 19 for partitioning the connector 14 and the coil terminal 13, the printed wiring board 1
The finger does not touch the coil terminal when connecting the connector 14 on the upper part 2 and the connector connected to the power supply. Further, the front cover 6 is provided with ribs 9 and 10 for forming the correction coil 7, and a flange 11 is provided at an end of the rib 10, so that the front cover 6 can be transported when the front cover 6 is transported by, for example, a conveyor. The ribs 9 and 10 do not overlap with each other even when they come close to each other. Furthermore, by providing the connector 14 with an opening through which the contact portions 23, 24 can be seen, it is possible to perform work while looking at the contact portions 23, 24 when connecting the connector on the power supply side. In addition, if the correction coil 7 is formed by winding a conductive wire around the outer circumference of the front cover 6, the front cover 6 and the correction coil 7 are integrated.

[0007]

Embodiments of the present invention will be described below with reference to FIGS.

5 to 7 show a deflection yoke D according to this embodiment.
1 shows an appearance of a deflection yoke assembly 1 including Y. As shown in the figure, the deflection yoke assembly 1 includes a coil bobbin 2 around which a horizontal deflection coil (not shown) is wound.
And a core 3 around which a vertical deflection coil (not shown) is wound, and the vertical deflection coil is arranged around the horizontal deflection coil. A known convergence yoke 4, a magnet 5 for various corrections, etc. are provided at the rear end of the deflection yoke DY.
Misconvergence correcting means 25 for correcting the misconvergence is provided above and below.

A ring-shaped front cover 6 made of, for example, resin is attached to the front end of the coil bobbin 2. The front cover 6 presses the coil bobbin 2 composed of two members so as not to spread, and the deflection yoke D
It is for reinforcing Y.

In this embodiment, the front cover 6 is provided with the coil 7 for image rotation correction by the following configuration. That is, for example, FIG. 8 shows a conventional front cover 6A, but in the case of the present embodiment, a pair of parallel ribs 9 and 10 are provided on the outer surface of the cover body 8 similar to the conventional example at a predetermined interval. Is provided and a conductive wire is wound between these ribs 9 and 10 to form the coil 7.

Further, a flange portion 11 to be described later is integrally formed on the peripheral edge portion of the rib 10 on the side of the deflection yoke DY among the ribs 9 and 10 facing each other.

A terminal plate 12 for connection as shown in FIG. 1A is attached to the front cover 6. A terminal pin 1 for winding the lead portion of the coil 7 on the surface of the terminal plate 12.
Two 3 are provided, and a male connector 14 for supplying power from a main body such as a display device is further provided.

On the other hand, as shown in FIG. 1C, the terminal pin 13 and the connector 14 are connected to the back surface of the terminal plate 12 by a wiring pattern 15 of printed wiring.

The terminal plate 12 is locked to the front cover 6 by the following structure. That is, as shown in FIG. 1A, two ribs 17 and 18 are provided on the inner rib 16 of the front cover 6, and recesses are formed in the opposing portions of the ribs 17 and 18. Then, both ends of the terminal plate 12 are fitted into the respective recesses.

On the other hand, the front cover 6 is provided with a protective portion 19 at a portion to which the terminal plate 12 is attached. The protective portion 19 separates the connector 14 from the terminal pin 13 so that a finger does not hit the terminal pin 13 when a female connector (not shown) for supplying power is attached to the terminal plate 12. belongs to. That is, as shown in FIGS. 1 and 2, the protective portion 19 has two tongue pieces 20 and 21 extended to be higher than the height of the terminal pin 13 when the terminal plate 12 is attached to the front cover 6. Consists of. The tongue piece 20 located on the left side in the figure has a rounded corner at its tip.

Further, the tongue piece 21 located on the right side in the drawing is formed in a step shape, and the right side portion thereof is formed at substantially the same height as the connector 14. Each corner of the tongue piece 21 is also rounded. In this case, the tongues 20 and 21 are formed with a predetermined space. And, as shown in FIG. 1A,
The notch 22 formed by the tongues 20 and 21 is arranged so as to be located substantially at the center of the terminal pin 13 provided on the terminal plate 12. Further, two notches 20a, 20b, 21a, 21b for winding and locking the lead portion of the coil 7 are provided at the opposing portions of the tongue pieces 20, 21. In this case, 20a and 21a are for starting the winding of the coil 7, and 20b and 21b are for ending the winding of the coil 7.

According to this embodiment having such a structure, the lead wire of the coil 7 does not get in the way when the deflection yoke DY is assembled or transported, and the working efficiency can be improved. Further, since the protection portion 19 is provided, the fingers do not touch the terminal pins 13 when the connector on the power source side is inserted into the connector 14 of the terminal board 12, so that the assembling, packing, and transferring work can be performed smoothly.

FIG. 3 shows a female connector 14 provided on the terminal plate 12. As shown in the figure,
The connector 14 has two contacts 23 and 24, and has a structure in which a portion facing the terminal pin 13 is open. With this configuration, when inserting the connector on the power source side into the connector 14, the assembly work can be performed while checking the position, and the work efficiency can be improved.

As described above, in this embodiment, the flange portion 11 is provided on the edge portion of the rib 10 of the front cover 6. This brings about the following effects.
That is, when manufacturing a front cover of this type, the front covers 6 are collectively conveyed by, for example, a conveyor.
Sometimes they approach each other. In that case, if no action is taken, the front cover 6 may be removed as shown in FIG. 4A, for example.
The ribs 9a, 9b, 10a, 10b of a, 6b overlap each other, and for example, the ribs 9a, 10a of one of the front covers 6a.
Comes into contact with the coil 7b wound on the other front cover 6b,
The conductor wire may be broken or the insulating coating on the surface of the conductor wire may peel off. Therefore, in the present embodiment, the flange portion 11 is provided on the rib 10 of the front cover 6 so as to eliminate such inconvenience. That is, as shown in FIG. 4B,
By providing the flange portion 11 on one rib 10,
Even when the front covers 6 approach each other and come into contact with each other when they are conveyed by the conveyor, they are blocked by the flange portions 11 and the ribs 9 and 10 and the conductor wire of the coil 7 are prevented from contacting each other. Therefore, according to the present embodiment, it is possible to prevent the conductor wire of the coil 7 from being broken and the insulating film from being peeled off when being conveyed by the conveyor.

Although the flange portion is provided on one of the ribs in the above embodiment, the present invention is not limited to this, and the flange portion may be provided on both ribs. Further, the protective portion provided on the front cover is not limited to that of the above-described embodiment, but may have various shapes and positions. However, in terms of workability, it is preferable that the protective portion is provided on the upper portion of the front cover.

Further, in the above embodiment, the flange portion is provided on one rib, but the flange portion may be provided on both ribs.

Furthermore, the present invention can be applied to both saddle type and toroidal type deflection coils. However, it is particularly effective when a saddle-type horizontal deflection coil and a saddle-type or toroidal-type vertical deflection coil are used.

[0023]

As described above, according to the present invention, the printed wiring board is provided on the front cover, and the power is supplied to the correction coil via the connector in the printed wiring board. The lead wire for supplying power does not become a hindrance during the assembly or transportation of the device, and the work efficiency can be improved. In addition, by providing the front cover with a protrusion for partitioning the connector and the coil terminal, when the connector connected to the power supply is attached to the connector provided on the printed wiring board, the fingers do not touch the coil terminal, so the deflection yoke It is possible to improve the efficiency of assembly work. Further, by providing a rib for forming the correction coil on the front cover and providing a flange at the end of this rib, even when the front covers approach each other when the front covers are conveyed by, for example, a conveyor or the like. Since the ribs do not overlap with each other, it is possible to prevent the coating of the conductive wire forming the correction coil from breaking or breaking. Furthermore, by providing the connector with an opening through which the contact portion can be seen, it is possible to work while looking at the contact portion when connecting the connector on the power supply side, and it is possible to improve work efficiency. In addition, if the correction coil is formed by winding a conducting wire around the outer circumference of the front cover, the front cover and the correction coil can be integrated to reduce the number of parts.

[Brief description of drawings]

1A is a plan view of a front cover according to an embodiment of the present invention. FIG. B is a side view of the front cover. C is a rear view of the terminal plate in the front cover.

FIG. 2 is a plan view showing a protective portion of the front cover of the embodiment.

FIG. 3 is a perspective view showing a connector of a front cover of the embodiment.

FIG. 4 is an explanatory diagram showing overlapping of ribs of the front cover.

FIG. 5 is a side view of a deflection yoke assembly including the deflection yoke of the embodiment.

FIG. 6 is a plan view of the deflection yoke assembly.

FIG. 7 is a rear view of the deflection yoke assembly.

FIG. 8 is a plan view and a side view of a conventional front cover.

[Explanation of symbols]

 1 Deflection Yoke Assembly 6 Front Cover 7 Coil 9, 10 Rib 11 Flange 12 Terminal Plate 13 Terminal Pin 14 Connector 19 Protective Section

Claims (5)

[Claims] 1. A cathode ray tube deflection yoke in which a front cover for holding a core of a deflection coil is provided with a correction coil for correcting image rotation on a display screen, and a printed wiring board is provided on the front cover. A coil terminal electrically connected to the correction coil and a connector for supplying power to the correction coil are provided on the printed wiring board, and the coil terminal and the connector are electrically connected. A deflection yoke for a cathode ray tube. 2. The deflection yoke for a cathode ray tube according to claim 1, wherein the front cover is provided with a protrusion for partitioning the connector and the coil terminal. 3. The deflection yoke for a cathode ray tube according to claim 1, wherein the front cover is provided with a rib for forming a correction coil, and a flange is provided at an end of the rib. 4. The deflection yoke for a cathode ray tube according to claim 1, wherein the connector is provided with an opening through which the contact portion can be seen. 5. The deflection yoke for a cathode ray tube according to claim 1, wherein the correction coil is formed by winding a conductive wire around the outer circumference of the front cover.