JP3361902B2 - Auxiliary deflection yoke and assembly method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an auxiliary deflection yoke provided with an auxiliary coil wound around the magnetic pole of a ring-shaped core having a plurality of pairs of magnetic poles, and a method of assembling the auxiliary deflection yoke.

[0002]

2. Description of the Related Art FIG. 9 is a side view of a deflection yoke disclosed in Japanese Patent Laid-Open No. 3-233841, and FIG. 10 is a front view showing the structure of an auxiliary deflection yoke thereof. A ring-shaped core having a plurality of magnetic poles is provided near the electron gun side of the auxiliary deflection yoke, and a part of the vertical deflection current is shunted to the auxiliary coil wound around the magnetic pole of the core. Is. In the figure, 1 is a deflection yoke, 2 is a horizontal deflection coil, and 3 is a vertical deflection coil, both of which are saddle type coils. 4 is a magnetic core, 5 is a separator, 6 is a magnetic core made of a magnetic material such as ferrite, and 7 is a magnetic core 6.
Magnetic poles formed integrally with the magnetic pole 7 are auxiliary coils wound around the magnetic pole 7, and these constitute an auxiliary deflection yoke 9.

Generally, the self-convergence type deflection yoke 1 sets the horizontal deflection magnetic field distribution to a pin cushion type and the vertical deflection magnetic field distribution to a barrel type, and also has a central axis of the deflection yoke of the horizontal deflection magnetic field and the vertical deflection magnetic field. It is realized by adjusting the deflection center position of the direction. However, when the horizontal deflection coil and the vertical deflection coil are configured in a saddle type, it is extremely difficult to adjust the deflection center position of the vertical deflection coil located inside the horizontal deflection coil, and the vertical deflection magnetic field side of the electron gun is adjusted. There is little spread to. Therefore, as in this conventional example, an auxiliary deflection yoke 9 is provided on the electron gun side of the deflection yoke, and a vertical deflection current is supplied to the auxiliary coil 8 to adjust the center position of the vertical deflection magnetic field. .

FIG. 10 is a circuit diagram of this conventional example. The same reference numerals as those in FIG. 9 denote the same parts,
10 m and 10 s are variable resistors, 11 is a vertical deflection output circuit, and when the vertical deflection current Iv is applied to the auxiliary coil group 8 connected in series to the vertical deflection coil 3, an electron beam as shown in FIG. Can generate a magnetic field that vertically deflects the magnetic field, and substantially lengthens the magnetic path of the vertical deflection magnetic field, and at the same time, can correct deflection aberration generally called coma aberration.

Further, as shown in FIGS. 11 (a), 11 (b) and 11 (c), the 8-pole magnetic pole 7 can be selectively excited and generated, which also enables dynamic convergence correction.

[0006]

The problems of the conventional auxiliary deflection yoke will be described below. (1) The outer diameter of the magnetic core 6 is about 60 mm to 100 mm, and the thickness is about 3 mm to 10 mm.
When the magnetic core 6 is manufactured from a ferrite material, shape deformation such as sagging of the magnetic pole portion or reduction of roundness of the ring-shaped core portion is likely to occur particularly in the firing process, which is a factor that deteriorates the yield during manufacturing. Has become. (2) The vicinity of the roots of the magnetic core 6 and the magnetic pole 7 is weak against vibration and impact due to dropping, and cracks and cracks are likely to occur. (3) It is extremely difficult to wind the auxiliary coil 8 in a toroidal shape on the magnetic pole 7 protruding from the magnetic core 6 toward the center. This problem is the same in the case of a magnetic core made of a silicon steel plate having relatively high dimensional accuracy. (4) In order to solve the above problems, a winding frame in which the auxiliary coil 8 is wound around a winding frame of a molded product or the like is inserted in the magnetic pole 7 in a separate step, and the ends of the auxiliary coils 8 are further wired. However, if the number of wiring lines is large, the workability becomes very poor. As described above, the conventional auxiliary deflection yoke has some functional advantages, but has many problems in terms of strength and workability during manufacturing.

The present invention has been made in order to solve the above problems, and has a structure of an auxiliary deflection yoke which is excellent in impact resistance and workability and has high dimensional accuracy, and its assembly. Aim to get a way.

[0008]

Auxiliary deflection according to the present invention
The yoke is an electronic version of saddle-shaped horizontal and vertical deflection yokes.
It is arranged on the gun side and extends from the ring-shaped core in the direction of the central axis.
To the magnetic pole of a magnetic core having a plurality of magnetic poles forming a pair.
In the auxiliary deflection yoke formed by winding the coil,
The air core has the same shape including the magnetic pole and a part of the ring-shaped core.
The partial cores that are separated into
A predetermined number of parts by forming a flexible connecting part between
It is a combination of cores.

A method of assembling the auxiliary deflection yoke according to the present invention
To the magnetic poles of the partial cores that are connected to each other by the connecting portion.
The process of winding the auxiliary coil, the auxiliary coil is wound around the magnetic pole.
This includes the step of shaping the broken partial core into an annular shape and fixing them together.
It is a waste.

The auxiliary deflection yoke according to the present invention is
Arranged on the electron gun side of the saddle type horizontal and vertical deflection yokes
And a pair extending from the ring-shaped core in the central axis direction
An auxiliary coil is wound around the magnetic pole of a magnetic core having multiple magnetic poles.
In the auxiliary deflection yoke, the neck of the cathode ray tube
Radially arranged on the hub part where a through hole for inserting the part is formed
And has a plurality of winding frames each having a hole for receiving the pole piece formed therein.
The holder and multiple magnets inserted in the holder
The pole pieces and the outer end surfaces of these pole pieces are attached so that they are in contact with each other.
A ring-shaped core and a magnetic core
is there.

A set of auxiliary deflection yokes according to the present invention
Standing method, formation hole that the neck of the cathode ray tube is passed interpolation
Auxiliary coils are attached to the winding frames that are radially arranged on the formed hub.
The process of winding the coil, mounting the pole pieces in the winding frame,
Ring-shaped cores are inscribed on the outer end faces of these pole pieces.
It includes a step of fitting and fixing together.

The auxiliary deflection yoke according to the present invention is
Split the hub portion of the holder between the reels and
An outer peripheral part provided with an outer peripheral part connected by a connecting part
Is.

A set of auxiliary deflection yokes according to the present invention
The vertical method is that the divided hub part is connected to each other at the connecting part.
Winding the auxiliary coil around the winding frame attached to the enclosed
Step, attach the pole piece to the bobbin, and bend the connecting part
Shaped into an annular shape and inscribed on the outer end face of each pole piece.
Including the step of fitting and fixing the ring-shaped core integrally
It is a thing. The auxiliary deflection yoke according to the present invention is
The holder inserts the magnetic poles into the molding die to form a unit.
It is shaped.

[0014]

According to the present invention, since the magnetic core is divided into the magnetic pole piece and the ring-shaped core forming the circulating magnetic path, the auxiliary coil can be easily wound around the magnetic pole piece and the integrated magnetic core can be formed. Since the shape is simplified as compared with, the manufacturing yield and productivity when formed of a ferrite material are improved.

Further, since the magnetic core is divided into a partial core composed of a part of the ring-shaped core and one magnetic pole, the winding can be facilitated in the same manner as described above, and in the case of the ferrite material, the winding is relatively easy. Since a small and simple shape is produced, manufacturing yield and productivity are improved.

Since a predetermined number of partial cores are connected to each other by a flexible connecting portion to form a developed core, winding is facilitated and productivity is improved as in the above case.

Further, the hub portion is provided with a holder provided with a winding frame in a radial shape, and the pole piece is inserted into the winding frame of the holder and the auxiliary coil is wound around each winding frame. The accuracy is improved, and the winding can be easily performed from the side of the core that abuts the protruding portion, so that the productivity is improved.

Further, since the holder is divided into the respective winding frames and formed into the connection type holder which is connected by the outer peripheral portion, the winding can be performed while setting the distance between the respective winding frames constant.
Productivity is improved because winding can be done quickly and easily.

Further, since the magnetic pole pieces are inserted and molded into the winding frame when the holder is molded, the magnetic pole pieces can be fixed in the winding frame with high positional accuracy.

[0020]

EXAMPLES Reference Example 1. Hereinafter, a reference example 1 of the present invention will be described with reference to FIG. In the figure, 12 is a ring-shaped core, 13 is a magnetic pole piece, 14 is a winding frame, and the auxiliary coil 8 is wound around the winding frame 14 to form the magnetic pole piece 1.
It is attached to 3.

In order to assemble the auxiliary deflection yoke 9, first, a wire such as a urethane electric wire is wound on the winding frame 14 made of a molded product such as plastic for a predetermined number of turns, and the auxiliary deflection yoke 9 is formed of a ferrite material or the like. The magnetic pole piece 13 is inserted. Next, as shown in FIG. 1B, the magnetic pole piece 13 is arranged on a substrate such as a printed circuit board (not shown) and fixed by an adhesive or the like, and then a predetermined wiring is made. The inner peripheral surface of the ring-shaped core 12 shown in FIG. 1 (c) forming the path is fitted so as to be inscribed in the outer end surface of the magnetic pole piece 13 radially arranged and fixed to the base body with an adhesive or the like.

According to this reference example 1 , the winding of the auxiliary coil 8 can be easily performed because the winding frame 14 is separated and independent.
Further, since the magnetic pole piece 13 and the ring-shaped core 12 that form the magnetic core are both simple in shape, even a magnetic core that has undergone a firing process such as a ferrite material can be accurately manufactured. Further, the ring-shaped core 12 and the pole piece 1 are further provided.
Since it is separate from 3, the connecting portion between the ring-shaped core 12 and the magnetic pole piece 13 is not damaged even if an impact is applied to the auxiliary deflection yoke 9.

Reference Example 2. 2A and 2B are views showing a reference example 2 of the present invention. FIG. 2A is a front view and FIG. 2B is a view showing one unit thereof. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, 15 is a partial core divided into T-shapes, 16 is a unit constituting the auxiliary deflection yoke 9 of the second embodiment, and FIG. The winding frame 14 around which the auxiliary coil 8 is wound is attached to the magnetic pole 7 of the partial core 15 obtained by dividing the magnetic core 6 shown in FIG.

As shown in FIG. 2 (a), this unit 16 is annularly arranged on a printed circuit board (not shown) and fixed by an adhesive, and a predetermined connection wiring is formed to obtain the auxiliary deflection yoke 9. To be

In this unit 16, the auxiliary coil 8 may be wound directly on the magnetic pole 7 of the partial core 15.

The units 16 are assembled by fixing the ends of the partial cores 15 with an adhesive, or by fitting the eight units 16 into a frame-molded product that can be accurately fixed. Good.

Further, in the second reference example , the number of the partial cores 15 is divided according to the number of magnetic poles. However, the partial cores 15 are divided within a range in which winding is possible or a range in which the winding frame 14 wound with the auxiliary coil 8 can be inserted. You may reduce the number.

Reference Example 3. FIG. 3 is a diagram showing a modified example of Reference Example 2 , and the same reference numerals as those in FIG. 2 denote the same or corresponding portions. This reference
In Example 3, the split position of the ring-shaped core is the root portion of the magnetic pole 7, and the shape of the partial core 15 is substantially L-shaped. The description is omitted because it is similar to the above.

According to the reference examples 2 and 3 , there is an advantage that only one type of die is required to form the partial core, and the total cost in manufacturing can be reduced. Further, since the partial core has a simple shape, it is possible to stably manufacture the dimensional accuracy even when the partial core is manufactured from a ferrite material or the like. Furthermore, since the magnetic core of the auxiliary deflection yoke is divided, it is possible to improve the impact resistance against vibrations and drops.

Example 1. FIG. 4 is a diagram showing a first embodiment of the present invention, FIG. 4 (a) is a front view, FIG. 4 (b) is a developed view during assembly thereof, and the same reference numerals as those in FIG. 2 denote the same or corresponding portions, respectively. ing. In the figure, the partial cores 15 are composed of laminated magnetic cores such as silicon steel plates, and the adjacent partial cores 15 are connected by a connecting portion 18 formed in a narrow bridge shape to form eight partial cores 1.
The expandable core 19 in which 5 is connected as shown in FIG.
Is formed in.

After the winding frame 14 around which the auxiliary coil 8 is wound is mounted on a predetermined magnetic pole 7 of the expandable core 19, as shown in FIG.
As shown in (a), the auxiliary deflection yoke 9 can be obtained by shaping it into an annular shape and fixing it with an adhesive.

In the first embodiment, the winding frame 14 around which the auxiliary coil 8 is wound is inserted around the magnetic pole 7, but in the state shown in FIG. 4 (b) in which the expandable core 19 is substantially linear, The auxiliary coil 8 may be wound directly on the magnetic pole 7, or the winding frame 14 may be inserted and then wound.

According to the first embodiment , it is advantageous for manufacturing the magnetic core and the auxiliary coil of the auxiliary deflection yoke, such as the vertical deflection system, which needs to flow the auxiliary deflection current having a relatively low frequency, and is substantially linear at regular intervals. Since it is possible to continuously wind the magnetic poles arranged side by side, productivity is improved. Moreover, since the winding of the auxiliary coil can be continuously performed and the winding of the auxiliary coil forming each pair can be continuously performed, the winding and connection work can be simplified.

Example 2. FIG. 5 is a view showing a second embodiment of the present invention, FIG. 5 (a) is a front view, and FIG. 5 (b) is a sectional view showing a structure of a portion where a winding frame and a magnetic pole are integrally assembled. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding portions, and reference numeral 20 denotes a hub portion, and through holes 21 and 8 through which the neck portion of the cathode ray tube is inserted.
One winding frame 14 is radially formed, and an insertion hole for the pole piece 13 is formed in each winding frame 14. Reference numeral 22 is a terminal pin insertion hole formed in the winding frame 14, and the hub portion 20 and the winding frame 14 form a holder 23.

In the assembling procedure of the second embodiment , after the pole piece 13 is inserted into the insertion hole of the winding frame 14, the auxiliary coil 8 is wound from a position near the hub portion 20 of the winding frame 14, and the terminal ends. It is connected to the terminal pin inserted in the insertion hole 22. next,
The ring-shaped core 12 is fitted on the outer periphery and fixed by an adhesive. Since the ring-shaped core 12 is inserted in the same direction with respect to the central axis of the holder 23, the ring-shaped core 12 can be easily assembled. At this time, if a silicon-based or rubber-based relatively viscous adhesive is applied to the outer ends of the magnetic pole pieces 13, the ring-shaped core 12 can be smoothly inserted and the ring-shaped core 12 is fixed. Can also be done.

According to the second embodiment , since the pole piece 13 is inserted into the winding frame 14 integrated by the hub portion 19,
Since the positional accuracy of the magnetic pole pieces 13 is improved and the auxiliary coil can be continuously wound around the winding frame 14 that extends radially, it is advantageous to wind a plurality of auxiliary coils. Further, since the shapes of the ring-shaped core and the pole pieces are simplified, the productivity is improved, and the dimensional accuracy is improved when the magnetic material is a ferrite material.

Further, in the second embodiment , the pole piece 13 may be inserted into the mold at the time of molding the holder and molded integrally with the holder 23. In this case, the labor of assembling the pole piece 13 can be omitted. At the same time, the positional accuracy of the magnetic pole piece 13 is improved, and the magnetic pole piece 13 is fixed in the holder 23. Therefore, noise due to the vibration of the magnetic pole piece 13 caused by the magnetic field generated by the auxiliary coil 8 does not occur.

Further, since the terminal pin is attached to the terminal pin insertion hole 22 provided in the winding frame 14, it can be used for processing the winding end of the auxiliary coil 8 and for wiring to a board or the like. Workability of wiring is improved.

Example 3. 6A and 6B are views showing a third embodiment of the present invention. FIG. 6A is a front view and FIG. 6B is a development view of a development type holder. In the figure, the same reference numerals as those in FIG. 5 denote the same or corresponding portions, and 24 denotes a development type holder, which is a divided hub portion 25, winding frame 14, and the surrounding portion 2 formed at the outer end of the winding frame 14.
6 and the connecting portion 27 of the surrounding portion 26, the pole piece 13 is mounted in the winding frame 14. 28 is a connecting wire of the auxiliary coil 8.

In the assembling procedure of the third embodiment , the auxiliary coil 8 is sequentially wound around each winding frame 14 of the holder 23 in the unfolded state, and the magnetic pole piece 13 is inserted into each winding frame 14 and then, as shown in FIG.
As shown in (a), the auxiliary deflection yoke 9 is obtained by shaping the ring-shaped core 12 so as to be inscribed in the outer end face of the magnetic pole piece 13 and fixing it with an adhesive as shown in FIG.

Example 4. FIG. 7 is a diagram showing a modification of the third embodiment , and the same reference numerals as those in FIG. 6 denote the same or corresponding portions. This example
Reference numeral 4 denotes a crossover 28 that is routed along the outer peripheral portion 26. By processing the crossover wire 28 in this way, the wiring process of the auxiliary coil 8 to the printed circuit board becomes easy.

According to the third and fourth embodiments , when the holder 24 is unfolded, the winding frame 14 is arranged in a straight line as shown in FIG. 7 (b), so that continuous winding is easy. In addition, the wiring between the auxiliary coils 8 can be easily routed.

[0043]

According to the present invention, the magnetic core has a ring shape.
Since it is composed of partial cores divided by core parts,
One type of mold for making a
There is a cost advantage. The partial core has a simple shape.
Therefore, dimensional accuracy is improved even when manufactured with ferrite materials
To do. Also, the magnetic core is divided into partial cores.
Therefore, it is resistant to shocks such as vibrations and drops. Further
In addition, the magnetic core is a flexible connecting portion between the partial cores.
Since it is formed on the connected core that has been formed,
Productivity is improved because it can be wound on magnetic poles arranged at regular intervals.
It Also, since the winding can be done continuously, each pair of auxiliary
Simplified wiring because the winding of the coil group can be done continuously.
Can be achieved.

Further, the winding frame for accommodating the magnetic pole pieces is released to the hub portion.
Positional accuracy of each pole piece is achieved by using a holder that is provided in a radial pattern.
As well as the auxiliary coils on the radially arranged reels.
Can be wound continuously, so multiple auxiliary
This type of auxiliary deflection yoke, which requires the coil to be wound,
It is advantageous to configure. Also, in the same way as above,
Since the shape is simple, the productivity of the core itself is improved.
The advantage of improving the dimensional accuracy of the core, which is a baked product, at the same time
There is.

Further, a developed type in which the holder is divided for each reel
Since it is configured to, with the winding is facilitated, each auxiliary co
There is an advantage that it is easy to route the crossover between the ills.
Also, the windings on each bobbin should be
Since it can be applied, it is possible to maintain a sufficient space between each winding part.
It facilitates winding of a complicated auxiliary coil.

In addition, a magnetic pole piece is inserted into each winding frame of the holder.
Since it is molded into a sheet, the position accuracy of the pole pieces is improved.
In addition, since it can be fixed to the bobbin integrally,
Vibration of the pole pieces caused by the magnetic field generated by
It is possible to prevent noise from being generated. Also, the insertion of the pole piece
Insert the pole pieces into the holder as this is done at the stage of forming the holder.
The process of inserting can be omitted at the assembly stage, and
The ruda and the pole piece are integrated, making it easy to handle and producing
The property is improved.

[Brief description of drawings]

FIG. 1 is a front view and a partial view showing a reference example 1 of the present invention.

FIG. 2 is a front view and a partial view showing a reference example 2 of the present invention.

FIG. 3 is a front view and a partial view showing a reference example 3 of the present invention.

FIG. 4 is a front view and a development view showing Embodiment 1 of the present invention.

5A and 5B are a front view and a sectional view showing a second embodiment of the present invention.

FIG. 6 is a front view and a development view showing a third embodiment of the present invention.

FIG. 7 is a front view and a development view showing a fourth embodiment of the present invention.

FIG. 8 is a side view of a deflection yoke including a conventional auxiliary deflection yoke.

FIG. 9 is a front view of a conventional auxiliary deflection yoke.

FIG. 10 is a circuit diagram showing a connection relationship between an auxiliary coil and a vertical deflection coil of an auxiliary deflection yoke of a conventional example.

FIG. 11 is a diagram showing 2, 4, and 6-pole magnetic fields generated in a conventional example.

[Explanation of symbols]

1 deflection yoke, 2 horizontal deflection coils, 3 vertical deflection coils, 4, 6 magnetic cores, 7 magnetic poles, 8 auxiliary coils,
9 Auxiliary deflection yoke, 12 Ring core, 13 Magnetic pole piece, 14 Winding frame, 15 C-shaped partial core, 16 Auxiliary deflection yoke unit, 17 L-shaped partial core, 18 Connecting portion, 19 Expansion core, 20 Hub Part, 21 through holes,
22 terminal pin insertion hole, 23 holder, 24 development type holder, 25 split hub part, 26 outer peripheral part, 27 connecting part, 28 crossover wire.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuaki Miyake Inventor Miyake No. 1-1, Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Production Technology Center (56) Reference JP-A-63-294653 (JP, A) JP-A-61-126743 (JP, A) JP-A-5-314925 (JP, A) Actual development Sho-63-93055 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 29/76 H01J 9/236 H01J 29/51

Claims (7)

(57) [Claims] 1. An auxiliary coil is wound around a magnetic pole of a magnetic core which is arranged on the electron gun side of saddle type horizontal and vertical deflection yokes and has a plurality of magnetic poles forming a pair extending in the central axis direction from a ring-shaped core. In the rotated auxiliary deflection yoke, the magnetic core includes the magnetic pole and a part of the ring-shaped core.
Partial cores separated into one shape are arranged in an annular shape,
A certain number of flexible connecting parts are formed between the partial cores.
Auxiliary deflection yo-yo, characterized by connecting partial cores of
Ark. 2. A partial joint connected to each other by a connecting portion.
The process of winding the auxiliary coil around the magnetic pole, the auxiliary coil
The partially wound core is shaped into a ring and fixed together.
Assembling an auxiliary deflection yoke, characterized by including the steps of:
Law. 3. An auxiliary coil is wound around a magnetic pole of a magnetic core having a plurality of pairs of magnetic poles arranged in the saddle type horizontal and vertical deflection yokes on the electron gun side and extending from the ring-shaped core in the central axis direction. A hub formed with a through hole through which the neck portion of the cathode ray tube is inserted in the auxiliary deflection yoke that is rotated.
Of the magnetic pole pieces that are radially arranged in the
Holder with a number of reels and the holder
The inserted pole pieces and the outer end faces of these pole pieces.
A ring-shaped core and a magnetic core
An auxiliary deflection yoke, characterized in that 4. A through hole through which the neck portion of the cathode ray tube is inserted.
Complementary to multiple reels that are radially arranged on the formed hub.
The process of winding the auxiliary coil, mounting the pole pieces in the winding frame
Ring-shaped so as to inscribe the outer end faces of these pole pieces.
Characterized in that it includes a step of fitting and fixing the core integrally.
Assembling method of auxiliary deflection yoke. 5. The hub portion of the holder is divided between the reels.
Together, an outer circumference connected to the outer end of each reel by a connecting part
4. The auxiliary deflection yo-yo according to claim 3, wherein a portion is provided.
Ark. 6. The divided hub portion is connected to each other by a connecting portion.
Wind the auxiliary coil on the winding frame attached to the bounded outer part.
The step of rotating, attaching the pole piece to the winding frame, and connecting the connecting portion.
Bend and shape into an annular shape, and inscribe the outer end surface of each pole piece.
The ring-shaped core as shown in Fig.
A method of assembling an auxiliary deflection yoke, comprising: 7. The holder according to claim 3 or 5,
Inserts the magnetic pole into the molding die and molds it integrally.
An auxiliary deflection yoke, which is characterized in that