JPH0719077Y2 - Deflection yoke - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a deflection yoke mounted on a cathode ray tube of a television receiver or the like.

<Prior Art> As is well known, in a deflection yoke mounted on a cathode ray tube of a small-sized, portable television receiver, a horizontal pulse voltage generated by a horizontal deflection coil forming the deflection yoke is low. Since it is not necessary to consider the withstand voltage between the horizontal deflection coil and the vertical deflection coil, as a result, a so-called bobbinless type in which a coil bobbin does not exist between the tapered portions of the horizontal deflection coil and the vertical deflection coil is put into practical use. Has been done.

Then, in this case, both the horizontal deflection coil and the vertical deflection coil may be always wound at a predetermined position without causing the axial deviation phenomenon with respect to the tube axis center.
It is strongly desired in order to obtain good deflection characteristics (convergence characteristics, distortion characteristics).

In the conventional bobbin-less type deflection yoke,
As shown in the figure, the horizontal deflection coils 20 and 21 are positioned by accommodating the rear crossover portions 20a and 21a of the pair of horizontal deflection coils 20 and 21 wound in a paddle shape in the enlarged accommodating portion 23 of the coil bobbin 22. And the taper parts 20b and 21b of the horizontal deflection coils 20 and 21.
A pair of vertical deflection coils 25, 26 wound around the core 24 in a toroidal manner is arranged around the outer periphery of the core 24, and gap pieces 27, 28 are provided between the outer surfaces of the horizontal deflection coils 20, 21 and the inner surfaces of the vertical deflection coils 25, 26. Insert the vertical deflection coil 25, 26 and the horizontal deflection coil 20,
21 positions were adjusted (axis alignment).

<Problems to be Solved by the Invention> However, in the conventional deflection yoke, the axis of the horizontal and vertical deflection coils is aligned by using the gap piece, which complicates the work and causes a problem between the horizontal and vertical deflection coils. Since the gap piece is inserted, it is difficult to automatically assemble the deflection yoke, and there is a problem that mass productivity is poor.

The present invention has been made in view of the problems of the prior art described above, and it is possible to easily perform the radial position regulation of the core and the axial position regulation of the core. It is an object of the present invention to provide a deflection yoke capable of easily and surely performing the above.

<Means for Solving the Problems> In order to solve the above problems, the deflection yoke of the present invention has a core, a pair of paddle-shaped horizontal deflection coils wound along the inner surface of the core, and an outer periphery of the core. An accommodating portion having a pair of vertical deflection coils wound in a toroidal shape, accommodating the rear crossover portion of the horizontal deflection coil, and a hollow cylinder extending axially from the rear surface of the accommodating portion. A deflection bobbin comprising a piece and a coil bobbin comprising a pair of plate-shaped pieces extending from the front surface of the accommodating portion and extending between the core and the horizontal deflection coil; A core stopper that regulates the edge is provided, the facing surfaces of the pair of plate-shaped pieces are formed flat, and a separator that separates the rear crossover portion side of the horizontal deflection coil is provided on the facing surfaces. .

<Operation> The rear crossover portion of the horizontal deflection coil is easily attached to the accommodation portion of the coil bobbin because the facing surface of the plate-shaped piece is flat. In this case, the rear crossover portion side of the horizontal deflection coil is separated by the separator, and the generated horizontal deflection magnetic field is made into a magnetic field having a stronger barrel tendency. Further, the position of the core in the radial direction is regulated by the plate-shaped piece with respect to the horizontal deflection coil,
The axial position of the core is regulated by the core stopper. This ensures the axial alignment of the horizontal and vertical deflection coils.

<Embodiment> An embodiment of the deflection yoke of the present invention will be described below in detail with reference to the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a deflection yoke, which has an annular core 2, a pair of paddle-shaped horizontal deflection coils 3 and 4 wound on the inner surface of the core 2, and an outer circumference of the core 2. A pair of wound toroidal vertical deflection coils 5, 6
And a coil bobbin 7 arranged on the side of the rear crossovers 3a, 4a of the horizontal deflection coils 3, 4. As shown in FIGS. 4 and 5, the coil bobbin 7 constituting the deflection yoke 1 includes a space-shaped accommodating portion 8 for accommodating the rear crossover portions 3a and 4a of the horizontal deflection coils 3 and 4, and an accommodating portion 8. Tightening band and ring magnet (not shown) extending axially from the rear surface 8a of the
A hollow cylindrical piece 9 to which the like is attached, and a horizontal deflection coil 3 and 4 and a core 2 (non-wound portion of the vertical deflection coil 5 and 6) extending in the axial direction from the front edge 8b side of the accommodating portion 8. A pair of axially symmetrical plate-like pieces 10 and 11 inserted between the plate-like pieces 10 and 1
The core stoppers 12 and 13 are provided along with the outer periphery of 1, and a plurality of locking pieces 14 extending from the front edge 8b of the accommodating portion 8 toward the center. The plate-shaped pieces 10 and 11 provided on the coil bobbin 7 have a main portion 10 whose outer surface abuts on the inner peripheral surface of the core 2.
a, 11a and jetty separators 10b, 11b provided along the axial direction on the flat opposing surfaces (inner surfaces) of the main parts 10a, 11a
And has a substantially convex cross section, of which the main parts 10a and 11a start from the position corresponding to the front edge 8b of the containing part 8 and the separators 10b and 11b start from the bottom face 8c of the containing part 8. It is provided. Then, the main portions 10a and 11a are connected to the horizontal deflection coils 3 and 4, respectively.
Is placed (inserted) between the core and the core 2 and the separators 10b, 11b
Is arranged between the horizontal deflection coils 3 and 4 on the side of the rear crossover portions 3a and 4a of the horizontal deflection coils 3 and 4.

In the deflection yoke having such a configuration, the horizontal deflection coils 3 and 4 wound in a paddle shape are housed and locked by the rear crossover wire portions 3a and 4a in the housing portion 8 of the coil bobbin 7 via the locking pieces 14. hand,
The coil bobbin 7 is mounted. At this time, the coil bobbin 7 is attached to the rear crossover portions 3a and 4a of the horizontal deflection coils 3 and 4.
Separator 10 formed on the opposing surfaces of the plate-like pieces 10 and 11 provided on the
The mounting is performed in a state of being separated by b and 11b. In this case, since the facing surface is flat, the horizontal deflection coil can be easily assembled. Further, since the rear portions of the pair of horizontal deflection coils are separated by the thickness interval of the separators 10b and 11b, a horizontal deflection magnetic field strengthened in a barrel shape is generated. Horizontal deflection coil
Vertical deflection coils 5 and 6 wound on the core 2 in a toroidal manner are mounted on the outer circumferences of 3 and 4. At this time, the inner peripheral surface of the core 2 (the non-wound portion of the vertical deflection coils 5 and 6) is the main portion 10a of the plate-shaped pieces 10 and 11,
By abutting on the outer surface of 11a (the main parts 10a, 11a being arranged between the horizontal deflection coils 3, 4 and the core 2), the radial position of the core 2 is regulated, and at the same time, it is provided on the coil bobbin 7. When the rear end edge of the core 2 contacts the core stoppers 12 and 13, the axial position of the core 2 is regulated.

Incidentally, in the deflection yoke of the present invention, FIG. 6 (A), (B)
As shown in FIG. 5, the wedge-shaped notch K is provided in the main portion 10a (11a) of the plate-like piece 10 (11) provided on the coil bobbin, and the main portion 10
The a (11a) may have a radial spring property. According to such a configuration, when there is variation in the inner diameter of the core, this variation can be absorbed.

<Effect of the Invention> The deflection yoke of the present invention is as described in detail above.
The following effects are produced. That is, since the facing surfaces of the plate-shaped pieces are formed flat, the assembling work for mounting the pair of horizontal deflection coils in the housing portion of the coil bobbin becomes smooth. Further, since the separator provided on the plate-shaped piece is not provided over the entire rear crossing wire portion to the front crossing wire portion of the horizontal deflection coil, but is arranged on the rear crossing wire portion side, the horizontal deflection generated The magnetic field becomes a magnetic field with an increased barrel tendency. Particularly, in the present invention, since the axial position of the core is restricted by the core stopper and the radial position of the core is restricted by the plate-shaped piece, the winding positions of the horizontal deflection coil and the vertical deflection coil are restricted to predetermined positions. Thus, the axes of both coils can be easily and reliably aligned, and good deflection characteristics can always be obtained. In addition, it does not require a separate part for axis alignment, and the axis is automatically aligned during the assembly work of the deflection yoke, which greatly simplifies the work and enables the automatic assembly of the deflection yoke, thus improving mass productivity. It is rich in

[Brief description of drawings]

FIG. 1 is a side view of a deflection yoke in an embodiment of the present invention, FIG. 2 is a sectional side view of the same, and FIG. 3 is a III of FIG.
-III sectional view, FIG. 4 is a side view of the coil bobbin in one embodiment of the present invention, FIG. 5 is a front view of the coil bobbin, and FIGS. 6 (A) and 6 (B) are plate-like pieces provided on the coil bobbin. FIG. 7 is a side view and a front view of another embodiment, and FIG. 7 is a sectional side view of a conventional deflection yoke. 1 ... Deflection yoke, 2 ... Core, 3,4 ... Horizontal deflection coil, 3a,
4a ... Horizontal deflection coil rear crossover part, 5, 6 ... Vertical deflection coil, 7 ... Coil bobbin, 8 ... Housing part, 10, 11 ... Plate-shaped piece, 1
0b, 11b ... Separator,

Claims (1)

[Scope of utility model registration request] 1. A core, a pair of paddle-shaped horizontal deflection coils wound along the inner surface of the core, and a pair of vertical deflection coils wound toroidally around the outer periphery of the core.
An accommodating part for accommodating the rear crossover part of the horizontal deflection coil, a hollow cylindrical piece axially extending from the rear surface of the accommodating part, the core extending from the front surface of the accommodating part, and the horizontal deflection coil. In a deflection yoke comprising a coil bobbin consisting of a pair of plate-shaped pieces extending between the pair of plate-shaped pieces, a core stopper that restricts the rear end edge of the core is provided outside the plate-shaped pieces, A deflection yoke, wherein the opposing surface is formed flat and a separator is provided on the opposing surface to separate the rear crossover portion side of the horizontal deflection coil.