JP3110628B2 - Deflection yoke for black and white display monitor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke for a black-and-white display monitor, and more particularly, to a monochrome yoke capable of reducing a radiation magnetic field leaking from a deflection yoke in which both horizontal and vertical deflection coils comprise a pair of saddle type coils. The present invention relates to a display monitor deflection yoke.

[0002]

2. Description of the Related Art In recent years, in consideration of the adverse effect on other electronic devices due to the radiated magnetic field leaking from a display monitor or the effect on the human body, some new regulations have been set for the radiated magnetic field leaking from a display monitor. ing. The radiation magnetic field subject to such regulation is mainly generated from the horizontal deflection coil and the vertical deflection coil of the deflection yoke.

[0003] In a color display monitor, a so-called "cladder-type" deflection yoke in which both horizontal and vertical deflection coils are generally saddle-type is often used. The reason is that, compared with the deflection yoke of the saddle type and the toroidal type deflection yoke, the horizontal deflection coil can relatively easily reduce the radiation magnetic field leaking from the vertical deflection coil to a regulated value or less than the deflection yoke. Because it has.

[0004] However, it has been extremely difficult to reduce the radiation magnetic field leaking from the horizontal deflection coil to a regulated value or less simply by using a deflection yoke of the clutch type. For this reason, for example, as shown in FIGS. 10 (a) and 10 (b), deflection yokes 1A and 1B having special measures have been frequently used to reduce the radiation magnetic field.

That is, in the deflection yoke 1A, a pair of club-type horizontal auxiliary coils 2A, 2A are mounted on the deflection yoke 1A, and a magnetic field opposite to the radiation magnetic field leaking from the horizontal deflection coil is generated from the auxiliary coils 2A, 2A. By doing so, the radiation magnetic field is reduced. In the deflection yoke 1B, a pair of horizontal auxiliary coils 2B, 2B wound around a bobbin is mounted on the front opening of the deflection yoke 1B, and a radiation magnetic field leaking from the horizontal deflection coil from the pair of horizontal auxiliary coils 2B, 2B is provided. Generates a magnetic field in the opposite direction to reduce the radiated magnetic field.

[0006]

By the way, the deflection yoke in which the above-mentioned measures are taken is effective for a color display monitor. However, in a deflection yoke for a black-and-white display monitor, it has been difficult to put it into practical use because of the following problems. That is, in the deflection yoke 1C for a black-and-white display monitor whose general configuration is shown in FIG. 11, the deflection distortion is corrected by a plurality of magnets M1 and MA attached to the deflection yoke. For this reason, an operator looks at the screen of the display monitor to adjust the deflection distortion while looking at the rod-shaped magnet M1.
It is necessary to adjust the mounting position of the columnar magnet MA and to rotate the columnar magnet MA.

Accordingly, the deflection yoke for a monochrome display monitor is similar to the deflection yoke for a color display monitor.
Simply installing a pair of horizontal auxiliary coils as they are,
The risk of the worker touching the horizontal auxiliary coil during the adjustment work at the time of correcting the deflection distortion was extremely large. When the worker touches the horizontal auxiliary coil, the electric characteristics of the deflection yoke are changed, so that there has been a problem that various adjustment operations are required again. Further, when the horizontal auxiliary coil is mounted, the shape of the deflection yoke enlarged opening becomes large, and the space of the deflection yoke occupying in the display monitor device is increased, which is an obstacle to saving space in the display monitor device. I was

An object of the present invention is to provide a monochrome display monitor deflection yoke in which the horizontal and vertical deflection coils are both saddle type coils. Another object of the present invention is to provide a deflection yoke for a black-and-white display monitor that can easily adjust the deflection distortion correction.

[0009]

The horizontal deflection coil 2 and the vertical deflection coil 3 each comprise a pair of saddle type coils.
A pair of semi-cylindrical magnetic cores 4 and 4 are mounted on the outer peripheral side of the pair of vertical deflection coils 3 and 3 to correct deflection distortion.
With multiple magnets M1 and MA attached to
In Migihitsuji configuration was black-and-white display monitor for the deflection yoke
There are a pair of horizontal auxiliary coils 7, 7 formed in the quadrilateral substantially semicircular arc shape along the enlarged opening outer periphery of a pair of semi-cylindrical magnetic core 4, 4, one side of the horizontal auxiliary coil 7 housed
Arc-shaped storage portion 8a provided with a groove to be formed, and both ends of storage portion 8a
Columns 8b, 8b extending at right angles from
Horizontal auxiliary coil 7 provided on the outer peripheral wall of
Two hooks that combine with the coil separator 5 when installed
Stop pawls 8c, 8c, and provided on the front end sides of the support portions 8b, 8b
Elastic locking claws 8d, 8 for locking to semicircular cover member 9
d, and a semicircular storage member 8 comprising:
Arc-shaped storage section 9 provided with a groove for storing one side of coil 7
and a support 9 extending perpendicularly from both ends of the storage portion 9a
b, 9b, and provided at the front end side of the support portions 9b, 9b to be elastic.
Elastic locking claws 9c, 9c to which the locking claws 8d, 8d are fitted.
And a horizontal auxiliary coil 7 provided on the outer peripheral wall surface of the storage portion 9a.
Is connected to the coil separator 5 when attaching it to the deflection yoke.
Semi-circular arc comprising two engaging claws 9d, 9d
And a pair of semi-circular arc-shaped
Via the holders 6, 6, the magnetic cores 4 , 4 are easily attached to and detached from the deflection yoke along the outer peripheral edges of the enlarged openings so as to be located on the front bends of the vertical deflection coils 3 , 3 ,
It is configured to reduce the radiation magnetic field leaking from the horizontal deflection coils 2 .

[0010]

In the deflection yoke of the present invention, a pair of horizontal auxiliary coils formed in a substantially semicircular and quadrangular shape along the outer peripheral edge of the enlarged opening of the magnetic core are positioned on the front bend of the vertical deflection coil. Since the horizontal auxiliary coil is mounted via the semi-circular coil holder, the horizontal auxiliary coil can be positioned sufficiently inside the bar-shaped magnet and cylindrical magnet for correcting deflection distortion, so that the worker can deflect without touching the horizontal auxiliary coil. The distortion correction can be adjusted, and the radiation magnetic field can be reliably reduced. In addition, the size of the deflection yoke is reduced, so that the space required for the deflection yoke in the display monitor device can be saved, and the adjustment workability of deflection distortion correction is improved.

Further, since the magnetic core acts as a magnetic core of the horizontal auxiliary coil, a magnetic field opposite to the radiation magnetic field leaking from the horizontal deflection coil can be efficiently generated.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In addition,
This does not limit the present invention. FIG. 1 is a right side view showing a configuration of a deflection yoke 1 for a black-and-white display monitor according to the present invention, and FIG. 2 is a rear view thereof (the screen side of the display monitor is the front side). In the figure,
Reference numeral 2 denotes a saddle-type horizontal deflection coil, and reference numeral 3 denotes a saddle-type vertical deflection coil. Reference numeral 4 denotes a pair of semi-cylindrical magnetic cores disposed on the outer peripheral side of the vertical deflection coil, and reference numeral 5 denotes a coil separator. Numeral 6 denotes a semi-circular coil holder for accommodating a semi-circular quadrilateral horizontal auxiliary coil 7, which comprises a semi-arc storage member 8 and a semi-arc cover member 9 molded of insulating resin. It is configured. Reference numeral 10 denotes a front bend portion of the saddle type vertical deflection coil 3.

FIGS. 3A and 3B are a front view and a plan view, respectively, of the horizontal auxiliary coil 7 formed in a semicircular arc shape and a quadrilateral shape. The horizontal auxiliary coil 7 is formed by a self-fusing wire in which a fusion layer of polyamide or the like is provided on the outer periphery of an insulating layer of polyurethane or polyester, and the self-fusing wire is wound using a winding form. The magnetic core 4 is formed by heating with electric current or hot air, and is formed in a substantially semicircular quadrilateral along the outer peripheral edge of the enlarged opening of the magnetic core 4. The horizontal auxiliary coil 7 is mounted on the front bend 10 of the vertical deflection coil 3 via the coil holder 6.

FIGS. 4 (a) and 4 (b) are a plan view and a front view, respectively, illustrating the structure of the semicircular storage member 8 constituting the semicircular coil holder 6, with the horizontal auxiliary coil 7 stored. Is shown. The storage member 8 is provided with a storage portion 8a provided with a groove for storing one side of the horizontal auxiliary coil 7 along its circumferential direction, and stores one side of the horizontal auxiliary coil 7 from an end of the storage portion 8a. The pillar portions 8b, 8b provided with grooves extend in a right angle direction, and two sides extending from one side of the horizontal auxiliary coil 7 housed in the housing portion 8a are housed respectively. Elastic locking claws 8d for locking the storage member 8 to the semi-circular cover member 9 are provided on the distal ends of the pillars 8b, 8b, respectively.

Further, two locking claws 8c are provided on the outer peripheral wall surface of the storage member 8, and are used for coupling with the coil separator 5 when the horizontal auxiliary coil 7 is mounted on the deflection yoke.

FIGS. 5A and 5B are a plan view and a front view of a semicircular cover member 9 constituting the coil holder 6, respectively. The cover member 9 has a horizontal auxiliary coil 7.
An arc-shaped storage portion 9a having a groove for storing one side is provided, and a horizontal auxiliary coil 7 is provided from both ends of the storage portion 9a.
The pillar portions 9b, 9b each having a groove for accommodating each one side thereof are extended in a perpendicular direction. In addition, locking claw stoppers 9c, 9c are provided on the distal end sides of the pillars 9b, 9b, respectively, and the elastic locking claw 8d of the storage member 8 is fitted thereto. Further, the inner dimension of the groove of the cover member 9 is formed to be larger than the outer dimension of the storage member 8, and the storage section 9 of the cover member 9 is formed.
a is provided with a protruding piece 9d,
Is mounted on the deflection yoke so as to be connected to the coil separator 5.

The fitting of the cover member 9 and the storage member 8 is performed as follows. First, the support portions 8b, 8b of the storage member 8 are fitted into the grooves of the support portions 9b, 9b of the cover member 9, and the elastic locking claws 8d are locked to the locking claw locking portions 9c. FIGS. 6A and 6B show the coil holder 6 housing the horizontal auxiliary coil 7 in this manner.

On the other hand, as shown in FIGS. 6 (a) and 6 (b), the coil holders 6, 6 accommodating the pair of horizontal auxiliary coils 7, 7 are located at the outer peripheral edge of the front enlarged opening of the magnetic core 4. The locking claw 8c and the projecting piece 9d provided on the cover member 9 lock the coil yoke 5 and mount it on the deflection yoke. The pair of horizontal auxiliary coils 7, 7 mounted on the deflection yoke are connected in series or in parallel with the pair of horizontal deflection coils 2, 2.

Next, a magnetic field formed when a high-frequency deflection current is applied to the saddle type horizontal deflection coil will be described with reference to FIGS. The magnetic field generated by the horizontal deflection coil is a magnetic field H formed by the main deflection coil unit 11 of the horizontal deflection coil.
1, H1 and magnetic fields H2 and H2 formed by the front bend portion 12 of the horizontal deflection coil. As shown in FIG. 7, the magnetic fields H1 and H1 of the main deflection coil portion 11 and the magnetic fields H2 and H2 of the front bend portion 12 are provided. A magnetic field in a direction opposite to that of H2 is formed. Normally, the magnetic fields H1 and H1 are
Compared to 2, the strength of the magnetic field is higher. Then, the magnetic field distribution by the horizontal deflection coil becomes a distribution as shown by a broken line arrow in FIG. 8, and the radiated magnetic field 13 spreading forward from the front opening of the horizontal deflection coil is generated by the main deflection coil unit 11 of the horizontal deflection coil.
, And the magnetic field H2, H2 formed by the front bend portion 12, that is, (H1-H2).

Therefore, the rectangular horizontal auxiliary coils 7, 7 formed as described above are mounted on the outer peripheral edge of the front bend portion 10 of the vertical deflection coil 3, and the horizontal auxiliary coils 7, 7 are mounted.
The magnetic field generated from the front bend 1 of the horizontal deflection coil 2
When a high-frequency horizontal deflection current in the direction of the arrow as shown in FIG. 9 is applied to the horizontal auxiliary coils 7 so as to be in the same direction as the magnetic fields H2 and H2 formed in the horizontal deflection coil 2, the front bend portion 12 of the horizontal deflection coil 2 The formed magnetic fields H2 and H2 are strengthened, and the action of the magnetic field of the front bend portion 12 of the horizontal deflection coil 2 is strengthened. As a result, the radiation magnetic field 13 spreading forward from the front bend portion 12 of the horizontal deflection coil 2 can be reduced.

On the other hand, the radiated magnetic field leaking laterally from the vertical deflection coil 3 passes through the magnetic core 4 disposed on the outer peripheral side of the vertical deflection coil intensively, so that the radiated magnetic field leaking laterally from the display monitor almost disappears. You.

The deflection yoke for a black-and-white display monitor according to the present invention has a pair of horizontal auxiliary coils 7,
7 is housed in the pair of semicircular coil holders 6 and 6 and is mounted on the deflection yoke, so that it can be easily attached to and detached from the deflection yoke. Further, the horizontal auxiliary coils 7, 7 may be constituted by a litz wire or a collective electric wire in which a plurality of small-diameter insulated electric wires are twisted. In this case, the high frequency loss of the horizontal auxiliary coil can be reduced.

[0023]

According to the present invention, even in a monochrome display monitor having a deflection yoke in which both the horizontal deflection coil and the vertical deflection coil are saddle type coils, the radiation magnetic field leaking in front of the display monitor and the horizontal The radiation magnetic field leaking in the direction can be effectively reduced. In addition, the deflection yoke can be reduced in size, a deflection yoke for a black-and-white display monitor capable of saving space for the deflection yoke occupying in the monitor device can be obtained, and adjustment work of deflection distortion correction can be easily performed. There are significant practical effects.

[Brief description of the drawings]

FIG. 1 is a right side view of a deflection yoke for a black-and-white display monitor of the present invention.

FIG. 2 is a rear view of the deflection yoke for a black-and-white display monitor of the present invention.

FIG. 3 is an explanatory diagram of a horizontal auxiliary coil according to the present invention.

FIG. 4 is an explanatory diagram of a storage member according to the present invention.

FIG. 5 is an explanatory diagram of a cover member according to the present invention.

FIG. 6 is an explanatory diagram of a coil holder according to the present invention.

FIG. 7 is an explanatory diagram of a magnetic field generated by a horizontal deflection coil.

FIG. 8 is an explanatory diagram showing a magnetic field distribution by a horizontal deflection coil.

FIG. 9 is an explanatory diagram of a current flowing in a horizontal auxiliary coil according to the present invention.

FIG. 10 is an explanatory view showing a conventional example of a deflection yoke for a color display monitor.

FIG. 11 is a rear view showing a conventional example of a deflection yoke for a black-and-white display monitor.

[Explanation of symbols]

 1, 1C Deflection yoke for black and white display monitor 2 Horizontal deflection coil 3 Vertical deflection coil 4 Magnetic core 5 Coil separator 6 Coil holder 7 Horizontal auxiliary coil 8 Storage member 8a Storage section 8b Post section 8c Locking claw 8d Elastic locking claw 9 Cover Member 9a Storage section 9b Post section 9c Locking claw stopper section 9d Projection piece 10 Vertical deflection coil front bend section 11 Main deflection coil section 12 Horizontal deflection coil front bend section 13 Radiation magnetic field leaking forward H1 Magnetic field of main deflection coil section H2 Horizontal Magnetic field at the front bend of the deflection coil

Continuation of the front page (56) References JP-A-5-36361 (JP, A) JP-A-1-225046 (JP, A) JP-A-63-13245 (JP, A) JP-A-63-45962 (JP, A) , U) Japanese Utility Model 63-137446 (JP, U) Japanese Utility Model Application 2-22555 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 29/76

Claims (1)

(57) [Claims] 1. A horizontal deflection coil 2 and a vertical deflection coil 3 each comprise a pair of saddle type coils, and a pair of semi-cylindrical magnetic cores on the outer peripheral side of the pair of vertical deflection coils 3, 3.
Attach 4 and 4 and attach deflection distortion correction to deflection yoke
And a plurality of magnets M1 and MA
Black and white display met monitor deflection yoke, the pair of horizontal auxiliary coils 7, 7 increases along an open outer periphery formed in a quadrilateral almost semicircular magnetic core 4,4
Was a groove for accommodating the side of the horizontal auxiliary coil 7 arc
Storage portion 8a, and a column portion 8b extending in a direction perpendicular to both ends of the storage portion 8a,
8b and a horizontal auxiliary coil 7 provided on the outer peripheral wall surface of the storage portion 8a.
Is connected to the coil separator 5 to attach it to the deflection yoke.
A pair of engaging claws 8c, 8c, and a semi-circular cover provided on the front end side of the support columns 8b, 8b.
-Elastic locking claws 8d, 8d for locking to the member 9
A semicircular storage member 8 and a circular arc provided with a groove for storing one side of the horizontal auxiliary coil 7
Storage portion 9a, and a column portion 9b extending at right angles from both ends of the storage portion 9a,
9b, and the elastic locking claws 8 provided on the front end side of the support portions 9b, 9b.
d and 8d, and a horizontal auxiliary coil 7 provided on the outer peripheral wall surface of the storage portion 9a.
Is connected to the coil separator 5 when attaching it to the deflection yoke.
Semi-circular arc comprising two engaging claws 9d, 9d
And a pair of semi-circular arc-shaped
The magnetic cores 4 , 4 are biased along the outer peripheral edge of the enlarged opening so as to be located on the front bends of the vertical deflection coils 3 , 3 via the file holders 6, 6.
To the horizontal yoke ,
2. A deflection yoke for a black-and-white display monitor, wherein the deflection yoke is configured to reduce a radiation magnetic field leaking from the second display device.