JPH07142007A - Color cathode-ray tube - Google Patents

Abstract

PURPOSE:To improve the convergence of a deflection yoke and its purity quality by preventing slip of a wire rod by mounting a projection on the bottom part of a slit groove and reducing the dispersion of distribution of a coil by further forming a position regulating projection also in a coil guide groove. CONSTITUTION:A deflection yoke comprises a bobbin 121 subjected to coil winding and a magnetic core 121' tightly stuck to and arranged in the bobbin. A plurality of slit grooves 122 divided by projected bank 126s formed along laying direction of a coil 127 on the inner side of the bobbin which mikes contact with the outer wall of a funnel are provided and a plurality of coil position regulating projections 123 are installed in the bobbin. Thereby, the slip of the wire rods can be prevented and the dispersion of distribution of the coil can be reduced and accurate coil can be formed and a color CRT having a deflection coil of improved convergence and purity quality can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube,
In particular, the present invention relates to a color cathode ray tube provided with a deflection yoke in which the winding accuracy of a saddle type winding for generating a deflection magnetic field is improved.

[0002]

2. Description of the Related Art Generally, a color cathode ray tube used for a television receiver or a monitor terminal is composed of a panel section forming an image screen, a neck section accommodating an electron gun, and a funnel section connecting the panel section and the neck section. A vacuum envelope, a centering and purity correcting magnetic device mounted on the neck portion, and a deflection yoke mounted on a boundary region between the funnel portion and the neck portion.

FIG. 2 is a sectional view of a shadow mask type color cathode ray tube for explaining an example of the color cathode ray tube, wherein 1 is a panel portion, 2 is a neck portion, 3 is a funnel portion,
4 is a phosphor layer, 5 is a mask frame, 6 is a shadow mask, 7 is a panel pin, 8 is a suspension spring, 9 is a magnetic shield, 10 is an electron gun, 11 is a magnetic device for centering and purity correction, 12 is a deflection yoke, 121 is a bobbin, 121 'is a magnetic core, 13 is an electron beam, and 14 is an anode button.

In FIG. 1, a phosphor layer 4 made of phosphor mosaic of three colors is formed on the inner surface of the panel portion 1, and a shadow is attached to a panel pin 7 embedded in the inner wall via a suspension spring assembly 8. The mask structure is suspended.

The shadow mask structure includes a mask frame 5
And a shadow mask 6 whose periphery is spot-welded to the mask frame and a magnetic shield 9 for shielding the space of the funnel 3 from external magnetism.

The funnel portion 3 has a funnel shape, has a neck portion 2 for accommodating the electron gun 10 at its small diameter end, and frit-welds the open edge of the panel 1 to the large diameter end edge to form a vacuum envelope. To do.

A deflection yoke 12 is installed on the neck transition portion of the funnel, and an electron beam 13 emitted from an electron gun 10 is formed on the inner surface of the panel portion 1 to form a phosphor layer 4.
Reproduce the image by two-dimensional scanning up.

The centering and purity correcting magnetic device 11 mounted on the neck portion 2 adjusts the alignment of the electron gun axis and the tube axis and the mutual arrangement of the three electron beams to adjust the hue. Is a correction means.

The deflection yoke 12 is a bobbin 1 for supporting the winding.
21 and a magnetic core 121 ', the deflection yoke 12 in the figure is configured to generate a deflection magnetic field by a so-called saddle type winding.

FIG. 3 is a side view of the deflection yoke in which the magnetic core is shown in cross section to show the shape of the bobbin. The bobbin 121 has windings wound in a saddle shape, and the magnetic core 12 is provided on the back surface thereof.
1'is closely attached and mounted.

FIG. 4 is a front view of the deflection yoke as seen from the direction of arrow A in FIG. 3, in which 122 is a slit groove for laying a winding wire, and 124 is a winding guide groove formed at the end of the large diameter side. ,
Reference numeral 125 is a winding guide groove formed at the small-diameter side end portion, 126 is a jetty for forming the slit groove 122, and 127 is a winding wire (cross section).

In the figure, the bobbin 121 is divided into two parts 121a and 121b. The bobbin 121 has a winding guide groove 124 formed at the large-diameter side end on the panel side and a winding guide groove formed on the small-diameter side end on the neck side. Jetty 12 so as to connect the line guide groove 125
In the slit groove 122 formed by 6
Is laid.

As a prior art relating to this type of deflection yoke and a color cathode ray tube equipped with this deflection yoke, for example, Japanese Utility Model Publication No. 5-4192 is disclosed.
Japanese Examined Patent Publication No. 5-10786 can be cited.

[0014]

In the above prior art, the winding guide groove 12 formed at the large-diameter side end portion on the panel portion side.
4 and winding guide groove 12 formed at the small diameter side end on the neck side
5, a wire 127 is laid in a slit groove 122 formed by a jetty 126 so that the wire is wound in a split winding to obtain proper convergence characteristics.

FIG. 5 is a structural explanatory view of the bobbin of the deflection yoke used in the conventional color cathode ray tube.
(A) is a principal part structural view seen from the inside of the bobbin, and (b) is a cross-sectional view taken along the line AA of (a).

In the figure, a winding guide groove 124 formed on the large diameter side end portion on the panel side, a winding guide groove 125 formed on the small diameter side end portion on the neck side, and both winding guide grooves 124 and 12
5, the wire rod is divided and wound in a slit groove 122 formed by a jetty 126 extending so as to connect with the wire 5.

Since the slit groove 122 has a flat bottom portion as shown in FIG. 2B, the wire material forming the winding 127 may slip on the bottom portion, and It becomes irregular and cannot precisely form the magnetic field.

When a strong tension is applied to the wire in order to eliminate the displacement of the winding, the bobbin is deformed, which also adversely affects the characteristics of the deflection yoke.

The slit groove 122 has a function of restricting the winding distribution of the above-described divided winding, and the position, the number, or the shape of this jetty is changed to cope with the modification or modification of the winding distribution.

As described above, since the slit groove 122 around which the winding 127 is wound has a flat bottom portion formed by a jetty, the position of the wound wire rod in the slit groove must be accurately regulated. There is a problem that you can not.

The same applies to the case where a part of the jetty is cut out or the height of a part of the jetty is lowered to traverse the wire rod when the winding distribution is partially changed or modified. An object of the present invention is to solve the above-mentioned problems of the conventional technology,
An object of the present invention is to provide a color cathode ray tube having a deflection yoke that forms a precise winding distribution to reduce variations and improves convergence and purity quality.

[0022]

To achieve the above object, the present invention comprises a panel section forming an image screen, a neck section accommodating an electron gun, and a funnel section connecting the panel section and the neck section. In a color cathode ray tube comprising a vacuum envelope, a centering and purity correction magnetic device that is externally mounted on the neck portion, and a deflection yoke that is externally mounted on a boundary region between the funnel portion and the neck portion, the deflection yoke is A plurality of bobbins provided with windings and a magnetic core closely arranged on the bobbin, and divided by a jetty formed inside the bobbin in contact with the outer wall of the funnel along the laying direction of the windings. The slit groove is provided, and a large number of winding position regulating projections are formed on the bottom surface of the slit groove.

Further, according to the present invention, a vacuum envelope comprising a panel section forming an image screen, a neck section accommodating an electron gun, and a funnel section connecting the panel section and the neck section, and an exterior of the neck section. In a color cathode ray tube comprising a magnetic device for centering and purity correction, and a deflection yoke that is provided on the boundary area between the funnel portion and the neck portion, the deflection yoke is closely attached to the bobbin with the winding. And a plurality of winding guide grooves formed on at least one of the open ends of the bobbin, and is divided by a jetty formed inside the outer wall of the funnel along the laying direction of the winding. And a plurality of winding position regulating projections are formed on the bottom surface of the winding guide groove and the slit groove. .

Even if the winding position regulating projections formed in the slit groove or the guide groove are formed regularly,
It may also be formed randomly.

[0025]

With the above-described structure of the present invention, the wire rod laid in the slit groove is prevented from slipping, and a precise winding can be formed without applying excessive tension to the wire rod.

Further, since the winding position regulating protrusion is formed in the winding guide groove, more precise winding can be formed, variation in winding distribution can be reduced, and convergence and purity quality can be improved. It is possible to provide a color cathode ray tube including the deflection yoke.

[0027]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a structural explanatory view of a bobbin for explaining an embodiment of a deflection yoke used in a color cathode ray tube according to the present invention, in which (a) is a structural view of a main part as seen from the inside of the bobbin,
(B) is sectional drawing which followed the AA line of (a).

In the figure, 121 is a bobbin, 122 is a slit groove, 123 is a winding position regulating protrusion, 124 is a winding guide groove formed at the large diameter side end on the panel side, and 125 is a small diameter on the neck side. A winding guide groove formed at the side end portion, 126 is a jetty, and 127 is a winding. The wire material forming the winding 127 is the winding guide groove 12 formed at the large diameter side end portion on the panel side.
4 and winding guide groove 12 formed at the small diameter side end on the neck side
5 and both winding guide grooves 124 and 125 are divided and wound in a slit groove 122 formed by a jetty 126 extending so as to communicate with each other.

A large number of winding position restricting projections 123 are formed on the bottom of the slit groove 122, and the wire material to be laid is prevented from slipping by the winding position restricting projections 123.

As shown in FIG. 7B, a large number of winding position regulating projections 123 are formed at the bottom of the slit groove 122 formed by the jetty 126, and the wire rods of the winding position regulating projections 123 are engaged. Therefore, slippage (particularly lateral movement) in the slit groove 122 is suppressed.

Further, by forming the winding position regulating projections similar to the above in one or both of the winding guide grooves 124 and 125 on the large diameter side end portion on the panel portion side and the small diameter side end portion on the neck portion side. The slip of the wire can be further regulated.

The above-mentioned winding position regulating protrusions may be arranged regularly or may be formed randomly.

According to the present embodiment, it is possible to form a precise winding distribution, reduce variations, and improve convergence and purity quality.

[0035]

As described above, according to the present invention,
The winding position regulation protrusions provided at the bottom of the slit groove prevent slipping of the laid wire rod and can form a precise winding wire without applying excessive tension to the wire rod, resulting in a high-quality deflection yoke with no variations. be able to.

Further, since the winding position regulating protrusion is formed in the winding guide groove, a more precise winding can be formed, variation in winding distribution can be reduced, and convergence and purity quality can be improved. It is possible to provide a color cathode ray tube including the deflection yoke.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a bobbin for explaining one embodiment of a deflection yoke used in a color cathode ray tube according to the present invention.

FIG. 2 is a cross-sectional view of a shadow mask type color cathode ray tube for explaining an example of the color cathode ray tube.

FIG. 3 is a side view of a deflection yoke showing a bobbin shape in a cross section of a magnetic core.

4 is a front view of the deflection yoke as viewed in the direction of arrow A in FIG.

FIG. 5 is a structural explanatory view of a bobbin of a deflection yoke used in a conventional color cathode ray tube.

[Explanation of symbols]

 1 Panel Part 2 Neck Part 3 Funnel Part 4 Phosphor Layer 5 Mask Frame 6 Shadow Mask 7 Panel Pin 8 Suspension Spring 9 Magnetic Shield 10 Electron Gun 11 Centering and Purity Correction Magnetic Device 12 Deflection Yoke 121 Bobbin 121 'Magnetic Core 13 Electron Beam 14 Anode Button 121 Bobbin 122 Slit Groove 123 Winding Position Restricting Protrusion 124 Winding Guide Groove Formed at Large Diameter Side End of Panel 125 125 Winding Guide Groove Formed at Small Diameter Side End of Neck 126 126 Jetty 127 Winding.

Claims (2)

[Claims] 1. A vacuum envelope comprising a panel section forming an image screen, a neck section accommodating an electron gun, and a funnel section connecting the panel section and the neck section, a centering packaged on the neck section, and In a color cathode ray tube comprising a purity correcting magnetic device and a deflection yoke which is provided in a boundary region between the funnel portion and the neck portion, the deflection yoke includes a wound bobbin and a magnetic core closely attached to the bobbin. And a plurality of slit grooves defined by a jetty formed along the laying direction of the winding inside the bobbin in contact with the outer wall of the funnel of the bobbin, and a large number of windings on the bottom surface of the slit groove. A color cathode ray tube, characterized in that a line position regulating protrusion is formed. 2. A vacuum envelope comprising a panel section forming an image screen, a neck section accommodating an electron gun, and a funnel section connecting the panel section and the neck section, a centering packaged on the neck section, and In a color cathode ray tube comprising a purity correcting magnetic device and a deflection yoke which is provided in a boundary region between the funnel portion and the neck portion, the deflection yoke includes a wound bobbin and a magnetic core closely attached to the bobbin. And a plurality of winding guide grooves provided on at least one of the open ends of the bobbin, and a plurality of ridges formed along the laying direction of the winding on the inner side in contact with the outer wall of the funnel. A color cathode ray tube comprising a slit groove, wherein a plurality of winding position regulating protrusions are formed on the bottom surface of the winding guide groove and the slit groove. .