JPH08298081A - Deflecting yoke - Google Patents

Abstract

PURPOSE: To form the coil shape of a vertical deflecting coil almost symmetrically right and left to a central peak by starting the winding of a conductive wire on one side from the central peak, returning to the central peak, winding on the other side, then returning to the central peak. CONSTITUTION: In a vertical deflecting coil 1 comprising a funnel-shaped core 2 divided into two, the butt surface 3 of the core 2, and a conductive wire 4 toroidally wound on the core 2, positions at both ends of each surface 3 of the core 2 are indicated by (a), (b), and the position of a central peak by (c). When the conductive wire 4 is wound on the core 2, the conductive wire 4 is wound plural turns from the peak (c) toward the position (a), then returned to the peak (c), and the conductive wire 4 is wound plural turns toward the position (b), then returned to the peak (c). Thereby, the coil shape of the coil 1 is formed laterally symmetric with respect to the peak (c).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke to be combined with a cathode ray tube used in a television receiver or the like.

[0002]

2. Description of the Related Art A conventional deflection yoke will be described below with reference to the drawings. FIG. 5 is a side view of a conventional deflection yoke. In FIG. 5, 1 is a vertical deflection coil, 2 is a funnel-shaped core divided into two, and 3 is a core 2.
The abutting surfaces 4 and 4 are conducting wires wound around the core 2.
A horizontal deflection coil (not shown) is provided on the inner peripheral side of the vertical deflection coil 1 thus configured.

FIGS. 6A to 6C are front views for explaining winding of a vertical deflection coil around a divided core of a conventional deflection yoke. In FIG. 6A, the position of the right end of each abutting surface 3 of the core 2 is a, the position of the left end is b,
Also, the position of the central top is c. Then, the conductor wire 4 is wound around the core 2 in a toroidal shape. First, FIG.
The formation of the first layer winding will be described with reference to (a). Figure 6
As shown in (a), the conducting wire 4 is started from the winding start position 5 of the first winding of a at the right end portion of the core 2 and is wound outside through the inside of the core 2 to repeat the position of c at the center top. After that, the first number of turns is performed toward the winding end position 6 of the first layer of the left end portion b to form the first layer. When the first layer is formed, the conducting wire 4 is returned in the direction of arrow 7 from the winding end position 6 of b to the winding start position 5 of the position a at the right end on the first layer.

Next, the winding of the second layer will be described. Figure 6
As shown in (b), the conductor wire 4 is wound from the winding start position 5 on the first layer in the same manner as the first layer, and the second winding number is changed to the winding end position 6 on the second layer at the left end b. Roll to form the second layer. When the second layer is formed, the conducting wire 4 is returned in the direction of arrow 7 from the winding end position 6 of b to the winding start position 5 of a on the second layer at the right end. Next, the winding of the third layer will be described. Figure 6
As shown in (c), the conductor 4 is started from the winding start position 5 on the second layer in the same manner as the second layer, and the third winding number is reached up to the winding end position 6 on the third layer of the left end b. Is wound to form a third layer.

Then, such winding is sequentially repeated to form the coil 8 of the one core 2 in which a plurality of winding layers are formed. The other core 2 is similarly wound to form the coil 8. Then, the abutting surfaces 3 of the core 2 are abutted to each other to form the vertical deflection coil 1.

The vertical deflection coil 1 thus formed is shown in FIGS. 7 and 8. FIG. 7 is a front view of the vertical deflection coil of the conventional deflection yoke, and FIG. 8 is a side view of the vertical deflection coil of the conventional deflection yoke. As shown in FIGS. 7 and 8, when the conductive wire 4 is wound around the core 2, when the conductive wire 4 is wound in a toroidal shape while rotating the core 2, the conductive wire 4 is wound from the inner peripheral side to the outer peripheral side. While the core 2 rotates during this process, the outer peripheral side is wound later than the inner peripheral side, forming a coil shape. The number of windings at the position a at the right end and the position b at the left end around the position c is d and e for the small diameter side (electron gun side), g for the large diameter side (opening side), f
When expressed with, the ratio of the number of windings is d =
e, f> g on the large diameter side, and the vertical deflection coil 1 having a constant inclination is formed.

[0007]

In the structure of the conventional deflection yoke as described above, when the vertical deflection magnetic field generated at the position A on the small aperture side in FIG. 8 is viewed from the electron gun side, as shown in FIG. 9 forms a magnetic field which is substantially symmetrical to the left and right, and the electron beam 10 passing through this magnetic field is deflected upward as indicated by an arrow 11. However, when the vertical deflection magnetic field generated at the position B on the large diameter side in FIG. 8 is viewed from the electron gun side, the magnetic force lines 9 are left-right asymmetrical magnetic fields as shown in FIG. 10, and the electron beam 10 passing through this magnetic field is originally Then, what is deflected right above is deflected in the upper left direction as shown by arrow 12, the incident angle of the electron beam 10 on the shadow mask changes, and in the upper half of the screen, the electron beam 10 is directed to the right of the phosphor. Shift to
In the lower half of the screen, there is a problem that the electron beam 10 is displaced leftward from the phosphor.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a deflection yoke in which the coil shape of the vertical deflection coil is formed substantially symmetrically with respect to the central apex.

[0009]

In order to achieve this object, a deflection yoke according to the present invention comprises a pair of funnel-shaped cores, a vertical deflection coil in which a conductive wire is wound around each core, and a pair of horizontal deflection coils. The vertical deflection coil is composed of a plurality of winding layers that are overlapped with each other, and the winding layers respectively wind a conductive wire multiple times toward one side from the central top of the core as a starting point, and then return the conductive wire to the central top. Furthermore, it has a structure in which the conducting wire is wound a plurality of times toward the other side and then returned to the central top.

Further, the deflection yoke of the present invention comprises a pair of funnel-shaped cores, a vertical deflection coil in which a conductive wire is wound around each core, and a pair of horizontal deflection coils. The vertical deflection coils are wound in a plurality of layers. Each of the winding layers is composed of a winding layer, in which a conductor is wound multiple times from one core end of the core toward the central apex, and then the conductor is guided from the central apex to the other core end and then to the central apex. It has a configuration in which it is wound multiple times toward.

[0011]

In the deflection yoke of the present invention, the winding layers are formed by winding the conductor wire a plurality of times from one side toward the center top of the core, and then returning the conductor wire to the center top and further toward the other side. Since the conducting wire is wound a plurality of times and returned to the central apex, the coil shape of the vertical deflection coil can be formed substantially symmetrically about the central apex of the core.

Further, in the deflection yoke of the present invention, the winding layer is formed by winding a conducting wire a plurality of times from one core end of the core toward the central top, and further conducting wire from the central top to the other core end. Since the coil is wound around the central top portion a plurality of times after being guided, the coil shape of the vertical deflection coil can be formed substantially symmetrically about the central top portion of the core.

[0013]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a vertical deflection coil of a deflection yoke according to the first embodiment of the present invention.
In FIG. 1, the same reference numerals as in the conventional example are basically the same. In FIG. 1, 1 is a vertical deflection coil, 2 is a funnel-shaped core divided into two, 3 is an abutting surface of the core 2, and 4 is a conductor wire wound around the core 2 in a toroidal shape. A horizontal deflection coil (not shown) is provided on the inner peripheral side of the vertical deflection coil thus configured. And
For ease of explanation, the positions of both ends of each abutting surface 3 of the core 2 are a and b, and the position of the central top is c, as in the conventional example.

Next, the vertical deflection coil 1 constructed as described above.
The formation will be described. 2A to 2C are front views for explaining winding of the vertical deflection coil around the divided core of the deflection yoke in the first embodiment of the present invention. Figure 2
In (a), first, the formation of the first layer winding will be described. Starting from the center apex of the core 2, start winding the conductor wire 4 from the winding start position 5 on one right side of c, and wind the outside through the inside of the core 2 to wind the first winding number toward a on the right side. Turn. Then, when the winding is wound up to the winding end position 6, the conducting wire 4 is returned to the winding start position 5'on the left side of the central apex c indicated by the arrow 7 through the outside of the core 2. Next, start winding the conductor wire 4 from the winding start position 5'on the left side of the other side of c, and b on the left side.
The same number of turns as the first number of turns on the right side is performed toward the winding end position 6 ′. Then, when the winding is finished up to the winding end position 6 ', the conductor wire 4 is returned from the winding end position 6'to the winding start position 5 of c at the central top, and the formation of the first layer is completed.

Next, the formation of the second layer winding will be described with reference to FIG. The conducting wire 4 is started to be wound from the winding start position 5 on the right side of the central top c of the first layer, and is wound a second number of times toward the winding end position 6 of the right side a. Then, when the wire 4 is wound up to the winding end position 6, the conducting wire 4 is returned from the winding end position 6 of a to the winding start position 5 ′ on the left side of the central top c. Next, the conducting wire 4 is started from the winding start position 5'on the left side of c toward the winding end position 6'of b on the left side, and the same number of turns as the second winding number on the right side. Then, when the winding is finished up to the winding end position 6 ', the conductor wire 4 is returned from the winding end position 6'of b to the winding start position 5 of c at the central top, and the formation of the second layer is completed.

Next, the formation of the third layer winding will be described with reference to FIG. The conducting wire 4 is wound from the winding start position 5 on the right side of the central c on the second layer, and is wound a third number of times toward the winding end position 6 on the right side a. Then, when the wire 4 is wound up to the winding end position 6, the conducting wire 4 is returned from the winding end position 6 of a to the winding start position 5 ′ on the left side of the central top c. Next, the conducting wire 4 is started from the winding start position 5 ′ on the left side of c toward the winding end position 6 ′ of b on the left side, and is wound the same number of times as the third winding number on the right side. When the winding is finished up to the winding end position 6 ', the conducting wire 4 is returned from the winding end position 6'of b to the winding start position 5 of c at the central top, and the formation of the third layer is completed.

Then, the winding is sequentially repeated in this manner to form the coil 8 of the one core 2 in which a plurality of winding layers are formed. The other core 2 is similarly wound to form the coil 8. Then, the abutting surfaces 3 of the core 2 are abutted to each other to form the vertical deflection coil 1. The first number of turns is greater than the second number of turns and is equal to the second number of turns.
The number of turns is greater than or equal to. This has multiple winding layers 1
This is because the second layer is wound on the second layer, the second layer is wound on the second layer, and the third layer is wound on the second layer.

As described above, the vertical deflection coil 1 is alternately turned from the center top of the core 2 toward the winding start positions 5 and 5'to the winding end positions 6 and 6'on both ends, respectively.
Since it is wound in a toroidal shape while being rotated, the core 2 rotates while the conductor wire 4 is wound from the inner circumference side to the outer circumference side, so that the outer circumference side is wound later than the inner circumference side.
The alternately wound coil shapes are wound on the outer peripheral side with a delay and are substantially symmetrical. Then, as shown in FIG. 1, a at the right end of the core 2 is centered on the position of c at the central top.
When the number of windings at the position of and the position of b at the left end are represented by d and e on the small diameter side and g and f on the large diameter side, respectively, the ratio of the number of windings on the right side and the left side centering on c is , D = e on the small diameter side and g = f on the large diameter side, the coil shape of the conducting wire 4 is not inclined in one direction, and the core 2
It is wound symmetrically about the central top of the.

The deflection magnetic field of the vertical deflection coil 1 which is formed substantially symmetrically about c as described above will be described below.
FIG. 3 is a view showing the deflection magnetic field on the large diameter side of the vertical deflection coil of the deflection yoke in the first embodiment of the present invention from the electron gun side. As shown in FIG. 3, in the vertical deflection coil 1 formed substantially symmetrically to the left and right, the magnetic field lines 9 of the vertical deflection magnetic field generated are substantially symmetrical to each other. This magnetic field is electron beam 1
When 0 passes, it is deflected upward as shown by arrow 13. Then, on the screen, the distortion of the image disappears and the image becomes substantially symmetrical.

The shape of the vertical deflection coil 1 of the deflection yoke according to the first embodiment of the present invention is such that the winding of the conductive wire 4 is started from the position c at the central apex toward the position a at the right end. On the contrary, even if the winding of the conductive wire 4 is started from the position c at the central top to the position b at the left end, it does not change at all if it is wound alternately from the central top to the left and right.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. 4 (a)-
(C) is a front view explaining winding of the vertical deflection coil around the divided core of the deflection yoke in the second embodiment of the present invention. In FIG. 4, the same reference numerals as those of the first embodiment are basically the same, and thus the detailed description is omitted. In FIG. 4A, first, formation of the first layer winding will be described. Conductor 4
Starting from the winding start position 5 of a on the right end, which is one of the core ends of the core 2, and then winding the outside through the inside of the core 2 to the winding end position 6 of c at the central top. Wind the number of turns of. Then, when the wire 4 is wound up to the winding end position 6, the conducting wire 4 is guided from the winding end position 6 of c at the central apex to the winding start position 5 ′ of b at the left end which is the other core end. next,
Starting the winding of the conductor wire 4 from the winding start position 5'of b at the left end, and winding toward the winding end position 6'of c at the center apex.
Wind as many times as the number of turns. Then, the conductive wire 4 is moved from the winding end position 6'of c at the center to the winding start position 5 of a at the right end.
To complete the formation of the first layer.

Next, the formation of the second layer winding will be described with reference to FIG. The conducting wire 4 starts to be wound from the winding start position 5 of a at the right end on the first layer, and the winding end position 6 of c at the center top.
A second number of turns toward. Then, when the winding is finished up to the winding end position 6, the conducting wire 4 is placed at the winding end position 6 of c at the center top.
To the winding start position 5'of b on the left end. Next, the conductor wire 4 is wound from the winding start position 5 ′ of b on the left end portion and wound toward the winding end position 6 ′ of c at the center top, and the same number of windings as the second winding number on the right side. To do. Then, connect the lead wire 4 to the central c
From the winding end position 6 ′ to the winding start position 5 of “a” at the right end, the formation of the second layer is completed.

Next, the formation of the third layer winding will be described with reference to FIG. Starting from the winding start position 5 of a at the right end on the second layer, start winding the conductor wire 4 and the winding end position 6 of c at the center top.
For a third number of turns. Then, when the winding is finished up to the winding end position 6, the conducting wire 4 is placed at the winding end position 6 of c at the center top.
To the winding start position 5'of b on the left end. Next, the conductor wire 4 is wound from the winding start position 5 ′ of b on the left end portion and wound toward the winding end position 6 ′ of c at the center top, and the same number of windings as the second winding number on the right side. To do. Then, connect the lead wire 4 to the central c
From the winding end position 6'to the winding start position 5 of a at the right end, the formation of the third layer is completed.

Then, the winding is sequentially repeated in this manner to form the coil 8 of the one core 2 on which a plurality of winding layers are formed. The other core 2 is similarly wound to form the coil 8. Then, the abutting surfaces 3 of the core 2 are abutted to each other to form the vertical deflection coil 1.

In this way, the vertical deflection coil 1 is rotated alternately from the winding start positions 5 and 5'of a and b at both ends to the winding end positions 6 and 6'of c at the central top, respectively. Since the conductor 4 is wound in a toroidal shape while being wound, the core 2 rotates while the conductor wire 4 is wound from the inner circumference side to the outer circumference side, so that the outer circumference side is wound later than the inner circumference side and is alternately wound. The wound coil shape is wound on the outer peripheral side with a delay and becomes substantially symmetrical. As shown in FIG. 1, the number of windings at the position a at the right end and the position b at the left end around the position c at the central top of the core 2 is d, e on the small diameter side, and the large diameter is set on the small diameter side. When the side is represented by g and f, the ratio of the number of turns on each of the right side and the left side centering on c is equal to d = e on the small diameter side and g = f on the large diameter side.
The shape of the wound coil does not tilt in one direction,
The core 2 is wound substantially symmetrically about the central top.

[0026]

As described above, in the deflection yoke of the present invention,
It is possible to realize an excellent deflection yoke in which the coil shape of the vertical deflection coil is formed substantially symmetrically with respect to the center top of the divided core, and distortion of the image on the screen is eliminated.

[Brief description of drawings]

FIG. 1 is a front view of a vertical deflection coil of a deflection yoke according to a first embodiment of the present invention.

2A to 2C are front views illustrating winding of a vertical deflection coil around divided cores of a deflection yoke in the first embodiment of the present invention.

FIG. 3 is a diagram showing a deflection magnetic field on the large diameter side of a vertical deflection coil of the deflection yoke in the first embodiment of the present invention from the electron gun side.

FIGS. 4A to 4C are front views illustrating winding of a vertical deflection coil around a divided core of a deflection yoke in the second embodiment of the present invention.

FIG. 5 is a side view of a conventional deflection yoke.

6A to 6C are front views illustrating winding of a vertical deflection coil around a divided core of a conventional deflection yoke.

FIG. 7 is a front view of a vertical deflection coil of a conventional deflection yoke.

FIG. 8 is a side view of a vertical deflection coil of a conventional deflection yoke.

FIG. 9 is a view showing the vertical deflection magnetic field on the small diameter side of the vertical deflection coil of the conventional deflection yoke from the electron gun side.

FIG. 10 is a view showing the vertical deflection magnetic field on the large diameter side of the vertical deflection coil of the conventional deflection yoke from the electron gun side.

[Explanation of symbols]

 1 Vertical Deflection Coil 2 Core 3 Butt Face 4 Conductor 5,5 'Winding Start Position 6,6' Winding End Position 7,13 Arrow 8 Coil 9 Magnetic Line 10 Electron Beam

Claims (2)

[Claims] 1. A pair of funnel-shaped cores, a vertical deflection coil in which a conductive wire is wound around each of the cores, and a pair of horizontal deflection coils, wherein the vertical deflection coil is composed of a plurality of winding layers that are overlapped with each other. Each of the winding layers has a plurality of windings of the conductive wire toward one side from the center top of the core as a starting point, returns the conductive wire to the central top, and further winds the conductive wire toward the other side a plurality of times. After that, the deflection yoke is returned to the central top. 2. A pair of funnel-shaped cores, a vertical deflection coil in which a conductive wire is wound around each of the cores, and a pair of horizontal deflection coils, wherein the vertical deflection coil is composed of a plurality of wound layers. Each of the winding layers has a plurality of windings of a conductive wire from one core end of the core toward the central apex, and further guides the conductive wire from the central apex to the other core end and then toward the central apex. The deflection yoke is characterized by being wound multiple times.