JPH07235273A - Deflector - Google Patents

Abstract

PURPOSE:To improve the deflection efficiency in a vertical deflection coil. CONSTITUTION:This is a deflector 10 composed of a deflection coil 16 installed on a cathode-ray tube 1, a separator 15 for winding to wind this deflection coil 16, and a core 17 for formation of a magnetic path. The core 17 is arranged inside the separator 15, and the deflection coil 16 is wound between the inner face of this core 1 7 and the right and left openings of the separator 15. Front and rear bends 15a and 15b are parallel with the direction of winding of the deflecting coil wound inside the core 17. The deflecting coil is wound in saddle shape, using ribs provided at both bends. Since the core 17 lies inside, the bore becomes small, and since the deflecting coil is wound fast to this, the deflection sensitivity improves. Since the magnetic field at the bend part is interrupted, this magnetic field does not affect the magnetic field for deflection of a beam. Since the number of windings can be lessened, L/R becomes large, therefore the deflection efficiency also improves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection device suitable for applying a vertical deflection coil around a core.

[0002]

2. Description of the Related Art A deflector used for a cathode ray tube (CRT) of a television receiver or various office automation equipment is shown in FIG. 8 and is arranged between a neck portion 1a of a cathode ray tube (CRT) 1 and a funnel portion 1b. Be attached to. As is well known, the deflection device 10 is composed of a horizontal deflection unit 10A and a vertical deflection unit 10B, and both the horizontal and vertical deflection coils 12 and 16 are wound in a saddle shape.

Specifically, the horizontal deflection section 10A is shown in FIG.
A horizontal separator 11 having a trumpet shape is used, and a horizontal deflection coil 12 is wound around the inner wall surface in a saddle shape.

A vertical separator 15 having a trumpet shape is also used in the vertical deflection unit 10B, a ferrite core 17 is attached so as to contact the outer wall surface of the vertical separator 15, and a vertical deflection coil 16 is provided on the inner wall surface side of the vertical separator 15. Are wound in a saddle shape using this vertical separator 15.

Horizontal separator 11 and vertical separator 15
Has a similar shape structure, and an example thereof will be described with reference to the vertical separator 15 shown in FIG. 9A. The vertical separator 15 has a front bend portion 15 on the funnel portion 1b side.
a is provided, and the rear bend portion 15b is provided on the neck portion 1a side.

Both the front and rear bend portions 15a and 15b are extended in directions orthogonal to the winding direction c of the vertical deflection coil 16 wound around the inner wall surface of the separator body 15c as shown in the figure. It is integrally molded with the separator body 15c in the closed state. Therefore, as apparent from FIG. 10 in which the inner wall surface of the separator body 15c is expanded, the vertical deflection coil 16 is wound in a saddle shape by utilizing the bend portions 15a and 15b described above.

[0007]

The vertical deflection coil 16 wound around the bend portion 15a, which has the ring-shaped bend portion 15a, is arranged in the circumferential direction of the funnel portion 1b (based on the CRT tube axis. The same applies hereinafter. ) Is the winding direction. The same applies to the vertical deflection coil 16 wound around the rear bend part 15b, and the ring-shaped neck part 1 is formed.
The circumferential direction of a is the winding direction.

On the other hand, the winding direction of the vertical deflection coil 16 wound around the separator body 15c coincides with the tube axis direction of the CRT 1. Therefore, the vertical deflection coil 1
6B shows the magnetic field distribution obtained by energizing No.
become that way. In other words, the magnetic field generated in the separator body 15c is not blocked by the ferrite core 17, and the direction of this magnetic field and the pair of bend parts 1 are used.
Since the direction of the magnetic field generated on the 5a, 15b side is opposite (reverse magnetic field), the magnetic field near the bend portion (point a and point b) of the separator body 15c decreases.

This reverse magnetic field cuts the effective deflection magnetic field for deflecting the electron beam near the front and rear bends. If an attempt is made to obtain an inductance for the magnetic field required for vertical deflection, the number of turns of the vertical deflection coil 16 will increase, and the L / R of the vertical deflection coil 16 will deteriorate. Since L / R is a barometer of deflection efficiency,
Deflection efficiency deteriorates.

Further, as is apparent from FIG. 9A, the vertical deflection coil 16 is not directly wound around the ferrite core 17 for forming the magnetic path, so that it does not have a close contact structure. Therefore, the inner diameter of the ferrite core 17 inevitably becomes large, which causes insufficient deflection sensitivity.

Therefore, the present invention solves the conventional problems as described above, and proposes a deflecting device capable of improving the deflection efficiency and the deflection sensitivity.

[0012]

In order to solve the above-mentioned problems, in the invention described in claim 1, a deflection coil mounted on a cathode ray tube, a winding separator around which the deflection coil is wound, and a magnetic path. A deflection device including a forming core, wherein the core is arranged inside the separator, and the deflection coil is wound between the inner surface side of the core and the left and right openings of the separator. It is characterized by what has been done.

[0013]

As shown in FIG. 5, a magnetic core forming ferrite core 17 is mounted on the inner surface of the vertical separator 15, and the vertical deflection coil 16 is wound around the vertical separator 15 in a state of including the ferrite core 17. Therefore, the vertical deflection coil 16 is wound in a state of being in close contact with the ferrite core 17, and the deflection sensitivity is improved accordingly.

As shown in FIGS. 1 and 2, the front bend portion 15a is provided in parallel with the winding direction of the vertical deflection coil 16 wound around the inner surface of the ferrite core 17, and the rear bend portion 15b is also the same. Vertical deflection coil 16
It is provided so as to be parallel to the winding direction of.

Therefore, the magnetic field generated by the current flowing through the vertical deflection coil 16 (the coil portions 16a to 16e, 16a 'to 16e' in FIGS. 3 and 4) wound around the bend portions 15a and 15b is the ferrite core 17. Blocked by. Therefore, these bend portions 15a, 15
The deflection magnetic field at b does not act as a reverse magnetic field, and the magnetic field characteristics shown in FIG. 6B are obtained, and the deflection efficiency is improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a case where an example of a deflecting device according to the present invention is applied to the above-mentioned deflecting device of a television receiver will be described in detail with reference to the drawings. A case where the present invention is applied to a vertical deflection unit will be exemplified.

According to the present invention, in the deflection device 10 mounted between the neck portion 1a and the funnel portion 1b of the CRT 1, a ferrite core 17 for forming a magnetic path is formed on the inner surface of the vertical separator 15 as shown in FIG. The vertical deflection coil 16 including the ferrite core 17 is attached to the vertical separator 15 and is wound around the vertical separator 15. As a result, the vertical deflection coil 16 is wound in a state of being in close contact with the ferrite core 17.

Since the vertical deflection coil 16 including the ferrite core 17 is wound around the vertical separator 15, the vertical separator 15 is constructed as shown in FIG.

FIG. 1 is a side view of a structure showing an example of the vertical separator 15. The separator body 15c has a trumpet shape as in the conventional case, and bend portions 15a and 15b are provided on both open end sides thereof, respectively. . The front bend part 15a provided on the funnel part 1b side is wound along the inner wall surface side of the separator body 15c as shown in FIG. 1 in the winding direction of the vertical deflection coil 16 (arrow c in FIG. 5).
Is formed in parallel with.

Therefore, as shown in FIG. 2, the front bend portion 15a is composed of a plurality of ribs (partition wall portions) 21 and 22 extending at equal intervals and extending radially. A plurality of ribs 21 (21
a) and a plurality of ribs 22 (22a, 22b, ...) Formed on the left side are formed in line symmetry, and the number thereof is equal.

Since the ribs 21 and 22 are formed radially, when the vertical separator 15 is viewed from its side, the rib surface (flat surface portion) becomes visible as it goes away from the tube axis as shown in FIG. The thickness of the ribs 21,22,
The width and spacing are determined by the size of the CRT 1 used and the number of coil turns.

The rear bend portion 15b is also the front bend portion 15a.
Is formed so as to be parallel to the winding direction of the vertical deflection coil 16 wound along the inner wall surface side of the separator body 15c. Therefore, the ribs 23 of the rear bend portion 15b,
24 is also formed to extend radially around the tube axis p.

The ribs 23, 24 are also formed symmetrically, the number of them is also equal to each other, and the distance between them is the front bend part 15a.
It is narrower than the side. The leg portion 25 on which the ribs 23, 24 are formed has a predetermined thickness in order to facilitate coil winding on the rear bend portion 15b side.

The front and rear bend portions 15 thus configured
An example of winding the vertical deflection coil 16 using the vertical separator 15 having a and 15b is shown in FIGS. In this case, the ferrite core 17 is already attached to the inner surface of the vertical separator 15 as shown in FIG. Since the ferrite core 17 is mounted on the inner surface of the vertical separator 15, the diameter of the entire core can be smaller than that of the conventional example as shown in FIG.

The coil winding state will be described with reference to FIG. 5 as well. The vertical deflection coil 16 is wound in a saddle shape along the inner surface of the ferrite core 17 so as to be in close contact therewith. Since the vertical deflection coils are composed of a pair of right and left, the right side structure will be described first.

By utilizing ribs 21b and 21c symmetrically provided with respect to the X axis as shown in FIGS. 3 and 4, first, the vertical deflection coil 16 for the innermost circumference (for convenience, the coil of the bend portion is referred to as 16a). ) Is wound on the vertical deflection coil 16 (16) by utilizing the ribs 21d and 21e on the outside.
b) is wrapped.

The coil is wound as shown in FIGS. 3 and 4 by using an appropriate rib so that a predetermined magnetic field distribution can be obtained. The ribs for the vertical deflection coil 16e wound around the outermost circumference are 21l and 21m.

Since the coil is wound by using the ribs extending radially, the front bend portion 15 is formed.
The vertical deflection coil 16b wound around the vertical deflection coil 16a passing through a is detoured around the outer peripheral surface of the separator body 15c as shown in FIGS.
It is wound along this outer peripheral surface. The outermost vertical deflection coil 16e is further wound around the outer peripheral surface of the separator body outside the vertical deflection coil 16e. Therefore, the coil is not concentrated on the front bend part 15a, and is wound around the outer peripheral surface of the separator body 15c in a widely dispersed state.

As for the rear bend portion 15b as well, the front bend portion 15 is formed by using a plurality of ribs 23 extending radially.
The winding method on the a side is exactly the same, and the separator body 15
It is wound around the outer peripheral surface of c in a dispersed state.

Also for the left vertical deflection coil, as shown in FIGS. 3 and 4, a saddle type is utilized by using a plurality of pairs of ribs 22 (22b to 22m) and 24 provided symmetrically to the X axis. Since the vertical deflection coil portions 16a 'to 16e' are wound in a circular shape, the coil distribution on the outer peripheral surface of the separator body 15c is symmetrical.

FIG. 6A is a sectional view of a vertical deflection portion on one side. When the coil distribution in the bend portion is dispersed to the outer peripheral surface of the separator main body 15c by using the front and rear bend portions 15a and 15b, this bend is generated. Since the magnetic field (reverse magnetic field) generated in the portions 15a and 15b is blocked by the ferrite core 17, it does not affect the magnetic field generated in the coil portion wound along the inner wall surface of the ferrite core 17. Therefore, as shown by the curve Lb in FIG. 6B, the average magnetic field becomes stronger because the reverse magnetic field does not act, and the deflection can be made wider.

Of course, in order to obtain the same amount of deflection, the number of turns of the vertical deflection coil 16 can be reduced, so that the DC resistance R of the vertical deflection coil 16 can be reduced, and as a result, L / R is increased and the deflection efficiency can be improved. I understand.

Since the coil wound along the outer peripheral surface of the separator body 15c is wound so as to connect the ribs in the shortest distance as shown in FIG. 3 or 4, this shortest winding is not required. For example, the DC resistance R of the coil can be further reduced, and the deflection efficiency can be further improved. When the deflection efficiency is improved, the voltage applied to the deflection device can be lowered and the driving thereof becomes easy.

The vertical deflection coil 16 is a ferrite core 17
In addition, since the ferrite core 17 can be wound closer to the CRT tube surface and closer to the CRT tube surface, the deflection sensitivity is also improved.

FIG. 7 shows another example of the present invention. In this example, only the front bend portion 15a is configured as shown in FIG. In this case, the magnetic field generated in the rear bend portion 15b acts as an inverse magnetic field, but the magnetic field generated in the funnel portion 1a mainly contributes to the magnetic field for deflecting the electron beam. Therefore, the average magnetic field on the side of the funnel portion 1a is not affected by the reverse magnetic field, so that the deflection efficiency can be improved as compared with the conventional case.

[0036]

As described above, in the deflection device according to the present invention, the magnetic path forming core is arranged inside the coil winding separator, and the inner surface of the core and the left and right openings of the winding separator are provided. The deflection coil is wound between and.

According to this, the diameter of the core becomes small,
Since it is closer to the cathode ray tube side, the deflection sensitivity is improved.

In addition to this, since the magnetic field generated on the bend portion side is blocked by the core, the magnetic field for beam deflection is not adversely affected. Therefore, the deflection efficiency is improved and the effective magnetic field area is expanded. In addition, the number of turns of the coil for obtaining the magnetic field required for the deflection is reduced and the L / R is increased, so that the deflection efficiency is significantly improved as compared with the conventional case.

Therefore, the present invention is suitable for application to a monitor deflection device for a television receiver or an OA device, in which both the horizontal deflection coil and the vertical deflection coil are wound in a saddle shape.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a vertical deflection coil winding separator used in a deflection device according to the present invention.

FIG. 2 is a rear view thereof.

FIG. 3 is a side view of a separator with a vertical deflection coil wound around it.

FIG. 4 is a rear view thereof.

FIG. 5 is a cross-sectional view of the deflecting device wound around a separator.

FIG. 6 is a cross-sectional view of a vertical deflection coil wound around a separator and a diagram showing a magnetic field distribution.

FIG. 7 is a sectional view similar to FIG. 5, showing another example of the vertical deflection coil winding separator.

FIG. 8 is a cross-sectional view of a conventional vertical deflection coil winding separator.

FIG. 9 is a cross-sectional view of a vertical deflection coil wound around a separator and a diagram showing a magnetic field distribution.

FIG. 10 is a development view showing a saddle type winding state.

[Explanation of symbols]

 1 CRT 1a Funnel part 1b Neck part 10 Deflection device 10A Horizontal deflection part 10B Vertical deflection part 11,15 Separator 12 Horizontal deflection coil 16 Vertical deflection coil 17 Ferrite core 15a, 15b Bend part

Claims (6)

[Claims] 1. A deflection device comprising a deflection coil attached to a cathode ray tube, a winding separator around which the deflection coil is wound, and a core for forming a magnetic path, wherein a core is provided inside the separator. A deflection device, wherein the deflection coil is disposed between the inner surface of the core and the left and right openings of the separator. 2. The separator has a front bend portion provided on the funnel portion side of the cathode ray tube and a rear bend portion provided on the neck portion side, and the front bend portion is provided on the inner surface side of the core. The deflection coil to be wound is provided so as to be parallel to the winding direction, the rear bend portion is provided to be orthogonal to the winding direction, and the deflection coil is wound between the both bend portions. The deflecting device according to claim 1, wherein: 3. The deflection device according to claim 1, wherein the front bend portion is composed of a plurality of ribs radially extending from the opening end side of the separator body. 4. The deflection coil is wound while being in contact with the outer peripheral surface of the separator body by winding the deflection coil using a plurality of ribs formed on the front bend portion. The deflecting device according to claim 3, wherein 5. The deflection device according to claim 1, wherein the rear bend portion is also provided so as to be parallel to the winding direction. 6. The deflection device according to claim 5, wherein the rear bend portion is composed of a plurality of ribs radially extending from the opening end side of the separator body.