JPH01225046A - Deflecting yoke - Google Patents

Abstract

PURPOSE:To offset and reduce the unnecessary radiation magnetic field and facilitate the manufacture by feeding the horizontal deflecting current to auxiliary coils directly wound on auxiliary bobbins in the direction to reinforce the leakage magnetic field generated by the bridge section of horizontal deflecting coils and arranging bobbins above and below the outside of the magnetic core of the deflecting yoke. CONSTITUTION:Auxiliary coils 6a and 6b wound on auxiliary bobbins 7a and 7b are provided above and below the outside of a magnetic core 4. The auxiliary coils 6a and 6b are connected to horizontal deflecting coils 2a and 2b, the horizontal deflecting current is fed through them. The auxiliary bobbins 7a and 7b facilitate the winding of the auxiliary coils 6a and 6b and the fixing to a deflecting yoke 1, the auxiliary coils 6a and 6b offset and reduce the unnecessary radiation magnetic field generated by the magnetization of the magnetic core 4 by the horizontal deflection magnetic field by forming the magnetic field in the opposite direction. The Auxiliary coils 6 directly wound on the auxiliary bobbins can be easily manufactured, and the unnecessary radiation magnetic field from the deflecting yoke 1 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deflection yoke that is used by being attached to a cathode ray tube, and particularly relates to a deflection yoke that can reduce unnecessary radiated magnetic fields.

[Conventional technology]

Conventional devices, as described in JP-A-62-93841 and JP-A-62-252048, cancel out unnecessary radiated magnetic fields from the deflection yoke by using a horizontal auxiliary coil that is approximately in the shape of a crutch connected to the horizontal deflection coil. The aim was to reduce the

[Problems to be Solved by the Invention] - The prior art described in JP-A No. 62-93841 provides an auxiliary coil on the outer wall surface of the yoke corresponding to the winding position of the deflection coil. A deflection current was passed through the auxiliary coil in a direction that canceled out the magnetic field generated in the auxiliary coil. Therefore, there are problems in terms of the shape of the auxiliary coil, which is easy to manufacture, and the direction of the current in the auxiliary coil, which is effective in reducing unnecessary radiated magnetic fields.

On the other hand, the prior art described in the above-mentioned Japanese Patent Application Laid-Open No. 62-252048 installs a substantially hollow-shaped auxiliary coil so as to overlap the transition portion of the horizontal deflection coil, and requires a semi-annular auxiliary bobbin. No consideration has been given to ease of manufacture and installation of the auxiliary coil to reduce the amount of space required.

An object of the present invention is to provide a deflection yoke that is capable of offsetting and reducing unnecessary radiated magnetic fields generated in the deflection yoke, is easy to manufacture, and is equipped with a correction means that does not take up much space.

[Means to solve the problem]

The above purpose is to apply a horizontal deflection current to the auxiliary coil wound directly on the auxiliary bobbin in a direction that strengthens the leakage magnetic field created by the transition section of the horizontal deflection coil. This is achieved by placing the

[Effect]

The auxiliary bobbin facilitates winding and fixing of the auxiliary coil to the deflection yoke. Further, the auxiliary coil reduces unnecessary radiated magnetic field generated by magnetization of the magnetic core by the horizontal deflection magnetic field by forming a magnetic field in the opposite direction to cancel it out.

〔Example〕

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

FIG. 1 is a diagram showing a first embodiment of the present invention, in which (a) is a perspective view of a deflection yoke, and (b) is a plan view. In the above figures, 1 is a deflection yoke, 2 is a horizontal deflection coil, 6 is a vertical deflection coil, 4 is a magnetic core, 5 is a separator, 6 is an auxiliary coil, 7 is an auxiliary bobbin, 8 is a core clamp, 9 is a terminal cover , 10 is a tightening band.

In this embodiment, as shown in FIG. 1(a), auxiliary coils 6a and 6b wound around auxiliary bobbins 7a'+7b are provided at the upper and lower parts of the outside of the magnetic core 4.

In addition, each auxiliary coil 6a, 61) is
Or horizontal deflection coils 2a, 2b as shown in (d)
The horizontal deflection current is applied.

2 and 3 show a sectional view taken along the I=I line and a sectional view taken along the II line of FIG. 1(b). As shown in each figure above,
The auxiliary coil A a r 6 b is connected so that the current direction is the same as that of the adjacent horizontal deflection coils 2 a and 2 b. Furthermore, the direction of the magnetic field 14 created by the auxiliary coils 6a and 6b coincides with the direction in which the leakage magnetic field 11 is strengthened by the fluorescent surface side transition portion 6c and the electron gun side transition portion 6d of the horizontal deflection coil, as shown in FIG. do. On the other hand, due to the magnetic field 12 created inside the magnetic core 4 by the horizontal deflection coils 6a and 6b, the magnetic core 4 is magnetized as shown by the north and south poles.

Due to the magnetization effect of the magnetic core 4, a leakage magnetic field 15 is generated outside the magnetic core 4, which causes an unnecessary radiated magnetic field from the deflection yoke 1. However, in this embodiment, since the auxiliary coils 6a and 6b generate a magnetic field 14 in the opposite direction to the upper magnetic leakage field 13, each magnetic field cancels out, making it possible to significantly reduce the unnecessary radiated magnetic field from the deflection yoke 1. can.

In addition, the auxiliary coils 6, 6b related to this embodiment are as follows:
A planar groove 15 as shown in FIGS. 4(a) and (b)
It is formed by directly winding it around an auxiliary bobbin 7 having a diameter. Furthermore, the auxiliary bobbin 7 includes a notch 7c and a protrusion 7 for fitting with the locking parts 5a and 5b of the separator 5.
It is equipped with d. Therefore, winding and attachment of the auxiliary coil 6 are easy.

FIG. 5 is a side view of a deflection yoke 1 showing a second embodiment of the invention. The auxiliary coil 6a1.6b in the figure is the sixth
Partially cylindrical groove 15 as shown in Figures (a) and (b)
It is wound around an auxiliary bobbin 7 having a deflection yoke 1.
The radial size of the auxiliary coil 6a #6b
Even if it is equipped, it does not increase much and has the effect of saving space. Furthermore, winding of the auxiliary coil 6 around the auxiliary bobbin 7 can be smoothly performed by using fixed frames 16a and 16b as shown in FIG. Furthermore, in FIG. 5, auxiliary coils 6, . 6t), as in the first embodiment, the unnecessary radiated magnetic field of the deflection yoke 1 can be reduced by flowing a horizontal deflection current in a direction that strengthens the magnetic field created by the cross section 9 of the horizontal deflection coil 2. .

FIG. 8 is a side view of a deflection yoke 1 showing another embodiment of the present invention. In the figure, the structure is the same as that of the first embodiment, except that a terminal 17 and a reactor storage portion 18 are formed on an auxiliary bobbin 7a around which an auxiliary coil 6a is wound. FIG. 8 is a diagram showing an auxiliary bobbin related to this embodiment.

According to this embodiment, there is an advantage that a large space can be secured for providing various electrical components connected to the deflection yoke 1.

In the present invention, even if the connection method of the horizontal deflection coil 2 and the auxiliary coil B is other than that shown in FIGS. It is sufficient if the deflection current is supplied to the auxiliary coil 6.

〔Effect of the invention〕

According to the present invention, by winding the auxiliary coil directly onto the auxiliary bobbin, the auxiliary coil can be easily manufactured, and the auxiliary coil can be mounted in a space-saving position without overlapping the transition portion of the horizontal deflection coil. By causing a horizontal deflection current to flow through the coil, there is an effect that unnecessary radiated magnetic fields from the deflection yoke can be canceled out and reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a first embodiment of the present invention, (a) l"
j A perspective view of the deflection yoke, (bl is a plan view, (cl and (dl are connection diagrams, Fig. 2 is a sectional view taken along the line I-I in Fig. 1 (b), Fig. 3 is Fig. 1 (b) FIG. 4 is a cross-sectional view of the main part taken along the line I-II of FIG.
is a plan view, (b) is a side view, FIG. 5 is a side view showing a second embodiment of the present invention, FIG. 6 is a view showing an auxiliary bobbin according to the present invention, (a) U plan view, (b) is a front view,
FIG. 8 is a side view showing another embodiment of the invention, and FIG. 9 is a plan view of an auxiliary bobbin according to the invention. Explanation of symbols 1...Deflection yoke, 2...Horizontal deflection coil, 6
...Vertical deflection coil, 4...Magnetic core, 5...
Separator, 6... Auxiliary coil, 7... Auxiliary bobbin, 8... Core clamp, 9... Terminal cover,
1o... Tightening with a band, 11... Magnetic field created by the transition part of the horizontal deflection coil, 12... Magnetic field created inside the core of the horizontal deflection coil, 13... Magnetic field generated by magnetization of the magnetic core, 14 ...Magnetic field created by the auxiliary coil, 15...
・Groove, 16... Fixed frame, 17... Terminal, 18.
...Reactor storage section, 19...Horizontal deflection current, 20.
...Coil conductor.

Claims (1)

[Claims] 1. To insulate a horizontal deflection coil that is attached to a cathode ray tube and is used to supply a high-frequency horizontal deflection current and a vertical deflection coil to which a low-frequency vertical deflection current is supplied. In the deflection yoke, which includes a separator arranged in the yoke and a magnetic core, auxiliary coils directly wound around the auxiliary bobbin are attached to the upper and lower parts of the exterior of the magnetic core by fitting the auxiliary bobbin and the separator, respectively; A deflection yoke characterized in that a horizontal deflection current is supplied to an auxiliary coil in a direction that strengthens a leakage magnetic field created by a transition portion of the horizontal deflection coil. 2. The deflection yoke according to claim 1, wherein the deflection yoke is provided with an auxiliary coil between the fluorescent surface side transition portion and the electron gun side transition portion of the horizontal deflection coil. 3. The deflection yoke 4 according to claim 1 or 2, characterized in that the groove of the auxiliary bobbin is formed to coincide with a flat surface or a partially cylindrical surface, and an auxiliary coil is wound around the groove. 4. The deflection yoke according to claim 1, wherein the bobbin is provided with a terminal or an electric component.