JPH041456B2 - - Google Patents

Description

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

Generally, a deflection yoke includes a core, a bobbin-shaped bobbin provided along the inner surface of the core, a vertical deflection coil wound around the core, and a horizontal deflection coil provided on the inner surface of the bobbin. The vertical deflection coil and the horizontal deflection coil are both wound in a toroidal shape, and the vertical deflection coil is wound in a toroidal shape. , a type in which a horizontal deflection coil is wound in a hollow shape is known.
Each is used depending on its purpose.

Among such deflection yokes, those in which the vertical deflection coil is wound in a toroidal or saddle shape and the horizontal deflection coil is wound in a saddle shape,
The horizontal deflection coil is wound into a hollow shape by applying pressure, heat, etc. through a mold using an automatic winding machine (hereinafter, the horizontal deflection coil formed in this way is referred to as a "mold-wound coil"). ). and,
As shown in FIG. 1, a horizontal deflection coil 1, which is separately formed by winding with a die, is attached to the inner peripheral surface of a bobbin 2 by adhesive or other means. For this reason, although the horizontal deflection coil 1 using a mold-wound coil is easy to manufacture, the winding distribution of the coil is limited during molding.
It is difficult to arbitrarily form a coil distribution to obtain a desired modified magnetic field, and there are also large manufacturing variations. In particular, in order to eliminate distortion of the electron beam, the horizontal deflection coil 1 has a thin coil distribution near the window 1A, and the outer end side 1B
Since the coils are wound so as to thicken the coil distribution, the gap between the molds becomes extremely small in the vicinity of the window 1A where the number of windings is small, which increases the disadvantage.

In order to eliminate such a drawback, as shown in the second figure, a large number of ribs 6, 6, ... are provided projecting in the front-rear direction over almost the entire inner circumferential surface of the bobbin 5, and between each of the ribs 6, Section grooves 7, 7,... for guiding the windings
It is also known that a horizontal deflection coil 8 regulated by the section grooves 7 is formed on the inner peripheral surface of the bobbin 5 by guiding the winding wire through the section grooves 7. (Hereinafter, the horizontal deflection coil formed in this way will be referred to as a "section-wound coil"). In the case of such a section-wound coil, the coil distribution can be arbitrarily shaped, and manufacturing variations can be reduced. On the other hand, since the protruding length of the rib 6 is limited by the diameter of the cathode ray tube, it is not possible to wind the wire up to the height of the rib 6, which deteriorates the performance as a horizontal deflection coil. There are drawbacks to doing so. Further, there is a drawback that the linear area ratio is reduced by the thickness of the rib 6. Furthermore, the section-wound coil requires a long winding time and has the disadvantage of poor workability.

The present invention has been made in view of the drawbacks of the prior art described above, and takes advantage of the advantages of mold-wound coils and section-wound coils, uses section-wound coils near the window where the coil distribution is thin, and uses the section-wound coils at the outer ends where the coil distribution is thick. By using a mold-wound coil on the side, it is possible to form the coil distribution to an optimum value and maintain its hollow shape, and also to increase the wire area factor and shorten the winding time. It is an object of the present invention to provide a deflection yoke that can be used as a highly accurate cross-shaped horizontal deflection coil.

In order to achieve the above object, the feature of the configuration adopted by the present invention is that a plurality of ribs are provided in the front and back direction on the inner peripheral surface side of the bobbin-shaped bobbin, located near the mutually opposing tops. A first horizontal deflection coil portion is wound around the section groove formed by the
Further, a second horizontal deflection coil portion formed by separate winding is attached to the inner circumferential surface side of the bobbin so as to surround the first horizontal deflection coil portion, and the second horizontal deflection coil portion The reason is that the coil portion constitutes a saddle-shaped horizontal deflection coil.

Embodiments of the present invention will be described in detail below with reference to FIGS. 3 to 7.

In the drawings, reference numeral 11 denotes a core made of a magnetic material such as ferrite, and a bobbin-shaped bobbin 12 made of an insulating material is attached to the inner surface of the core 11.
Here, the bobbin 12 is constructed by overlapping a pair of semi-bobbin-shaped bobbin forming members 13, 13, and each bobbin forming member 13 includes a substantially semicircular circumferential body portion 13A and an inner circumferential surface of the circumferential body portion 13A. A plurality of ribs 13B, 1 located near the tops of the sides and protruding parallel to each other and facing each other.
3B, . . . and positioning ribs 13C, 1 protruding horizontally from both sides of the inner peripheral surface of the circumferential body portion 13A.
3C, and a flange 1 that extends over the entire circumference and protrudes in the radial direction at the front end (in the direction of the enlarged part of the cathode ray tube) and the rear end (in the direction of the cathode ray tube neck) of the peripheral body part 13A, respectively.
3D, 13E and the front of each of the flanges 13D, 13E,
The circumferential trunk portion 13 is arranged so as to protrude rearward, respectively.
Each flange 13F, 1 protrudes only from the top part of A.
3G, and winding locking claw portions 13H that are located on both sides of the flanges 13F and 13G, and
13H,..., 13I, 13I,... and the collar portion 1
It consists of crossover wire accommodation grooves 13J and 13K (see FIG. 3) formed between 3D and 13E and 13F and 13G, respectively. And each rib 1
3B, 13B and the inner circumferential surface of the circumferential body portion 13A are section grooves 14, 14, . The spaces between the two are mold-wound coil housing grooves 15, 15.

Reference numeral 16 indicates a vertical deflection coil wound directly around the outer periphery of the core 11 in a toroidal shape, and reference numeral 17 indicates a horizontal deflection coil.
Sectional winding coil part 1 wound through 4
8 and a mold-wound coil part 19 separately molded by mold-winding, each coil part 1
8 and 19 are connected in series or in parallel.

Here, to describe the winding operation or forming method of the section-wound coil portion 18, first, the winding wire is wound as the main portion 18A along one section groove 14 formed on the inner peripheral surface side of the bobbin forming member 13. , is locked to the winding locking claw portion 13H on the front end side. Next, the crossover wire section 1 is inserted into the crossover wire accommodation groove 13J.
8B, the top part is held between them, and the winding locking claw part 13H located on the other side is locked, and the winding is wound along the other section groove 14. Next, the winding is locked to the winding locking claw part 13I on the rear end side, and passed through the connecting wire accommodation groove 13K as the connecting wire part 18C, and the top part is held between the wires and the winding locking claw part 13I on the other side. It is engaged with the claw portion 13I and wound again along one section groove 14 toward the front end. By repeating the above-described steps in this manner, the section-wound coil portion 18 having a cross-shaped shape is formed.

Furthermore, the mold-wound coil part 19 is accommodated in the mold-wound coil part housing groove 15 and fixed by means such as adhesive, and has a shape as shown in FIG. 7. That is, the mold-wound coil portion 19 has main portions 19A located on both sides of the main portion 18A so as to surround the main portion 18A of the section-wound coil portion 18.
, a crossover portion 19B disposed so as to come into contact with the front surface of the collar portion 13F on the front end side of the bobbin 12, and a crossover wire portion 19C disposed so as to come into contact with the rear surface of the collar portion 13G on the rear end side. It is formed. Thus,
The horizontal deflection coil 17 according to this embodiment has a section-wound coil section 18 which becomes a first horizontal deflection coil section.
and a mold-wound coil section 19 which becomes a second horizontal deflection coil section.

Since the present invention is constructed as described above, the vicinity of the top of the bobbin forming member 13 with a thin coil distribution is formed into a section-wound coil section 18 with a window, so that the winding can be positioned by the section groove 14. , it is possible to prevent the occurrence of variations in the density of the winding wire, and to maintain the shape of the coil as a saddle-shaped coil. On the other hand, since the coil distribution can be thickened on both side surfaces of the bobbin forming member 13, by using the mold-wound coil section 19 in this vicinity, it is possible to improve the wire area factor and shorten the winding time. . In particular, as the wire diameter of the winding increases, the gap between the wires near the window of the horizontal deflection coil becomes larger.
Although variations in winding density tend to occur, by making this part the section-wound coil part 18, the winding density in the main part 18A can be maintained at a predetermined value, resulting in a high-performance deflection yoke. I can do it.

In the embodiments of the present invention, the bobbin 12 has been described as being formed by a pair of semi-bobbin-shaped bobbin forming members 13, but it is also possible to form a single bobbin that is integrally formed into a bobbin shape. be. Further, in the above-described embodiment, the vertical deflection coil 16 was described as being formed in a toroidal shape, but it may be formed into a saddle-shaped vertical deflection coil like the horizontal deflection coil.

As described in detail above, in the deflection yoke according to the present invention, the horizontal deflection coil is wound in the first direction by section winding.
Because it is composed of a horizontal deflection coil section and a second horizontal deflection coil section wound with a mold, the winding density near the window where the coil distribution is thin can be kept constant and the wire area factor can be increased over the entire area. At the same time, the winding time can be shortened, and a high performance and highly accurate deflection yoke can be manufactured.

[Brief explanation of drawings]

Figures 1 and 2 show horizontal deflection coils of a deflection yoke according to the prior art. Figure 1 is a cross-sectional view of the horizontal deflection coil formed by die winding, and Figure 2 is a section view of the horizontal deflection coil. 3 to 7 show the deflection yoke according to the present invention, FIG. 3 is an overall configuration diagram shown as a half cross section, and FIG. 4 shows the - arrow in FIG. 3. 5 is a perspective view of the bobbin forming member, FIG. 6 is a sectional view in the direction of the - arrow in FIG. 5, and FIG. 7 is a perspective view of the mold-wound coil portion. 11...core, 12...bobbin, 13...bobbin forming member, 13A...circumferential body part, 13B...rib, 13C...positioning rib, 13D, 13
E, 13F, 13G...Tsubabe, 13H, 13I...
...Winding locking claw portion, 13J, 13K... Crossing wire accommodation groove, 14... Section groove, 15... Mold winding coil part accommodation groove, 16... Vertical deflection coil, 17
. . . horizontal deflection coil, 18 . . . section-wound coil portion (first horizontal deflection coil portion), 19 .

Claims (1)

[Claims] 1. A core, a morning glory-shaped bobbin provided along the inner surface of the core, a toroidal or saddle-shaped vertical deflection coil wound around the core, and a saddle-shaped bobbin provided on the inner peripheral surface of the bobbin. In a deflection yoke consisting of a horizontal deflection coil, a plurality of ribs are provided in the front-rear direction on the inner peripheral surface side of the bobbin, located near mutually opposing tops, and a section groove formed by each rib has a A first horizontal deflection coil section is wound around the bobbin, and a second horizontal deflection coil section is formed by winding the bobbin separately on the inner circumferential surface of the bobbin so as to surround the first horizontal deflection coil section. A deflection yoke, characterized in that the first and second horizontal deflection coil portions constitute a saddle-shaped horizontal deflection coil.