JP3153838B2 - Deflection yoke - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke used for a cathode ray tube of a display or a television.

[0002]

2. Description of the Related Art FIG. 10 shows, for example, Japanese Patent Application Laid-Open No. 63-86218.
FIG. 1 is a cross-sectional view showing a conventional deflection yoke shown in
1 is an exploded perspective view of FIG. In the figure, 1 is a horizontal coil bobbin for winding a horizontal deflection coil 2,
One end is provided with a large-diameter end hook 3 and a vertical groove 4 is provided at the small-diameter end. Reference numeral 5 denotes an integral core on which a vertical deflection coil 6 is wound.
And a small-diameter end side hook 8 and a ring-shaped integrated magnetic core 9 in the body.

The method of assembling such a conventional deflection yoke is as follows. First, the vertical deflection coil 6 has a saddle type that forms a desired magnetic field distribution on the inner surface of the magnetic core 9 while hooking the enamel wire on the large-diameter end hook 7 and the small-diameter end hook 8 of the integral core 5 in this order. Winded to form. On the other hand, the horizontal deflection coil 2 hooks the enameled wire in the same order as the vertical deflection coil 6 on the large diameter end hook 3 and the small diameter end side vertical groove 4 of the horizontal coil bobbin 1 in order.
The inner surface is wound so as to form a saddle shape for producing a desired magnetic field distribution. When each of the windings is completed, the horizontal coil bobbin 1 is inserted in one direction from the large-diameter end to the small-diameter end of the integrated core 5 on which the vertical deflection coil 6 is wound, and is then fixed. Complete. The use of the integrated bobbin 1 and the integrated core 5 has the advantage that the number of parts is smaller, the one-way assembly can be performed, and the assembly is easier than the divided bobbin and the core.

[0004]

As described above, in the conventional deflection yoke, the horizontal coil bobbin 1 is inserted in one direction from the large-diameter end of the integral core 5 to the small-diameter end. The rubber spacer is used for positioning between the horizontal coil bobbin 1 and the integral core 5 because the positioning between the horizontal coil bobbin 1 and the integral core 5 is difficult. Convergence is likely to occur on the screen due to a decrease in the convergence, and a large amount of time is required for convergence adjustment in a subsequent process.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a deflection yoke capable of improving the positioning accuracy when a horizontal coil bobbin is inserted into an integral core on which a vertical deflection coil is wound. It is an object.

[0006]

[Means for Solving the Problems]

The deflection yoke according to the first aspect of the present invention has at least four projections on the outer surface of the horizontal coil bobbin, and further has a small projection at the tip of the projection. A part of the tip of the small projection is inserted into the inner surface of the integral core while being scraped off.

[0008]

In the deflection yoke according to the second aspect of the present invention, the outer diameters of the four projections provided on the outer surface of the horizontal coil bobbin are set to be larger than the inner diameter of the integral core, and the bobbin is inserted into the integral core. When this is done, the bobbin is inserted into the integral core by elastic deformation of the bobbin cross section.

[0010]

[Action]

According to the first aspect of the present invention, the horizontal coil bobbin has at least four projections on its outer surface, and further has a small projection at the tip of the projection. Since a part of the distal end is inserted into the inner surface of the integrated core while being scraped off, the variation in the inner diameter of the integrated core can be absorbed.

[0012]

According to the second aspect of the present invention, the outer diameter of the four projections provided on the outer surface of the horizontal coil bobbin is set to be larger than the inner diameter of the integral core, and when the bobbin is inserted into the integral core. Since the bobbin is inserted into the integral core by elastic deformation of the bobbin section, variations in the inner diameter of the integral core can be absorbed.

[0014]

EXAMPLES Reference Example 1 FIG. It is described with sprinkled with some of the reference example the real施例of the present invention
You. First, Reference Example 1 will be described with reference to FIGS. FIG.
FIG. 2 is a cross-sectional view, and FIG. 2 is a side view showing the horizontal coil bobbin in FIG. In the figure, reference numeral 10 denotes four protrusions provided on the trumpet-shaped tapered portion 1a of the horizontal coil bobbin 1. When the four projections 10 are provided on the outer surface of the horizontal coil bobbin 1 as described above, the tip ends of the four projections 10 when the integrated core 5 having the saddle-shaped vertical deflection coil wound thereon are mounted on the horizontal coil bobbin 1. Are in contact with the inner surface of the integral core 5 and the integral core 5 can be held accurately.

Embodiment 1 At the tips of the four protrusions 10 in Reference Example 1 described above, FIG.
When the small protrusions 11 are provided as shown in FIG. 4, when the integrated core 5 is inserted, the small protrusions 11 are pressed in while being cut off, so that even if the inner diameter of the integrated core 5 varies, it can be absorbed. Thus, the integrated core 5 can be more accurately and easily held.

Reference Example 2 Four projections 10 in the above Reference Example 1, FIG. 5, in which a protrusion 10a having a length larger than the inner diameter of the integral core 5 as shown in FIG. When the bobbin 1 is inserted into the integral core 5, the four projections 10 a bend in the direction of the arrow and elastically deform, so that the bobbin 1 can be inserted into the integral core 5. This can be absorbed even if the inside diameter of the device varies.

Embodiment 2 FIG. The connecting portions of the bobbins 1 of the projections 10 and 10a of the first and second reference examples are elastic deformation portions 1b as shown in FIGS. When the bobbin 1 is inserted into the integral core 5, the four protrusions 1 are formed by the elastic deformation of the elastic deformation portion 1 b of the bobbin 1.
The bobbin 1 can be inserted into the integral core 5 by matching the outer diameters of the cores 0 and 10a to the internal diameter of the integral core 5, so that even if the internal diameter of the integral core 5 varies, it can be absorbed.

Embodiment 3 FIG. In each of the above embodiments, the vertical deflection coil 6 has a saddle type (saddle type), but may be a toroidal type. Further, the case where the number of the protrusions 10 and 10a is four has been described, but the number is not limited to four and may be five or more.

[0019]

As described above, according to the present invention, the rubber spacer is not required, and the positioning accuracy when the horizontal coil bobbin is inserted into the integral core can be improved.

[Brief description of the drawings]

1 is a cross-sectional view showing a reference example 1 of the present invention.

FIG. 2 is a side view showing the horizontal coil bobbin of FIG.

FIG. 3 is a transverse sectional view showing Embodiment 1 of the present invention.

FIG. 4 is an enlarged view of a part IV of FIG. 3;

FIG. 5 is a partially longitudinal side view showing a second embodiment of the present invention.

FIG. 6 is an enlarged view of a part VI of FIG. 5;

FIG. 7 is a transverse sectional view showing Embodiment 2 of the present invention.

FIG. 8 is an enlarged view of a portion VIII in FIG. 7;

FIG. 9 is an enlarged view of a portion IX of FIG. 7;

FIG. 10 is a sectional view showing a conventional deflection yoke.

11 is an exploded perspective view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal coil bobbin 1a Trump-shaped taper part 5 Integrated core 6 Vertical deflection coil 10, 10a Projection 10b Elastic deformation part 11 Small projection

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-86218 (JP, A) JP-A-5-11292 (JP, U) JP-A-4-27553 (JP, U) JP-A-3-275 4640 (JP, U) Shokai 55-102160 (JP, U) Shoko 49-30810 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 29/76

Claims (2)

(57) [Claims] 1. A deflection yoke having a trumpet-shaped tapered portion and a bobbin on which an inner surface of a horizontal deflection coil is wound is inserted into a ring-shaped integral core wound with a vertical deflection coil. The bobbin has at least four protrusions on an outer surface thereof, and further has a small protrusion provided at a tip of the protrusion. When the bobbin is inserted into the integral core, a part of the tip of the small protrusion is formed of the integral core. A deflection yoke, wherein the deflection yoke is inserted while being shaved off on an inner surface. 2. A bobbin provided with a trumpet-shaped tapered portion, having at least four projections on an outer surface, and having a horizontal deflection coil wound on an inner surface thereof, is formed into a ring-shaped integral core wound with a vertical deflection coil. In the deflection yoke configured by inserting the protrusion so as to be in contact with the inner surface of the integrated core, an outer diameter of the protrusion is set to be larger than an inner diameter of the integrated core, and the bobbin is mounted on the integrated core. A deflection yoke, wherein the outer diameter of the projection is made to match the inner diameter of the integral core by deforming the trumpet-shaped tapered portion by elasticity when inserted.