JPS645348Y2 - - Google Patents

Description

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

Generally, in a deflection yoke mounted on a cathode ray tube, a vertical deflection coil maintains the horizontality of the core with respect to the tube axis when attaching and fixing the core, which is wound toroidally around the outer circumference, to the outer surface of the bobbin. In order to obtain and maintain good deflection characteristics (distortion characteristics, trilemma characteristics, etc.), it is highly desirable to securely fix the core to the bobbin while maintaining horizontality. It is something.

In conventional deflection yokes, the tail edge of the core, which is attached and fixed to the outer surface of the bobbin, is locked by a locking means protruding from the rear outer surface of the bobbin to regulate its position, and the horizontality of the core relative to the jurisdiction is controlled. It was meant to maintain the However, in such a configuration, in order to absorb dimensional variations in the core, the head side of the core is configured to be slightly free (with dimensional margin) relative to the back surface of the enlarged front end portion of the bobbin. As a result, there is a risk that the core may tilt (change in position) with respect to the tube axis on the head side, making it difficult to maintain horizontality at all times, making it difficult to maintain good deflection characteristics. It has the disadvantage that it is extremely difficult to obtain and maintain good deflection characteristics.

The present invention relates to a deflection yoke intended to eliminate the above-mentioned drawbacks, and particularly to a deflection yoke having a bobbin configured to maintain the horizontality of the core with respect to the tube axis.

Hereinafter, one embodiment of the deflection yoke of the present invention will be described in detail with reference to the drawings. In Figures 1 and 2,
1 is a deflection yoke, which includes a core 2, a vertical deflection coil 3 wound toroidally around the outer circumference of the core 2,
It consists of a cross-shaped horizontal deflection coil 5 attached to the inner surface of the core 2 via a bobbin 4, and the bobbin 4
A tightening tongue 6 formed on the rear side of the tube is reduced in diameter by a tightening means (such as a band) 7, and then fixed to a predetermined position on the cathode ray tube 8. As shown in FIGS. 3 and 4, the bobbin 4 constituting the deflection yoke 1 houses front and rear connecting wire portions 5A and 5B of a horizontal deflection coil 5 wound in a saddle shape at its front and rear ends. Enlarged section 4
It has 1,42. A pair of position regulating means 9 are provided diagonally on the back surface 41A of the front end enlarged portion 41 of the bobbin 4, corresponding to the non-wound portion 2A of the vertical deflection coil 3 of the core 2. The position regulating means 9 includes a plurality of struts 9A extending in the axial direction from the back surface 41A of the front end enlarged portion 41, and a plurality of struts 9A arranged at right angles to the struts 9A (perpendicular to the tube axis) at the tips of the struts 9A. The head end edge 2A1 of the non-wound portion 2A of the vertical deflection coil 3 of the core 2 comes into contact with the surface of the support piece 9B. A pair of adhesive application portions 10 are formed on the back surface 41A of the front end enlarged portion 41 of the bobbin 4 at positions substantially orthogonal to the position regulating means 9, corresponding to the winding portions of the vertical deflection coil 3 of the core 2. The adhesive application portion 10 includes a horizontal flange 10A extending in the tube axis direction from the back surface 41A of the front end enlarged portion 41 of the bobbin 4, and a vertical flange 10A of the bobbin 4 extending from a substantially middle portion in the axial direction of the flange 10A. It consists of a main part 10B formed toward the surface of the main body 43, a hole 10C is bored in the main part 10B close to the flange part 10A, and a hole 10C is formed in the lower part (center direction) of the hole 10C parallel to the flange part 10A. A plurality of jetties 10D are formed with gaps between them, and uneven portions T are provided.
The front 3A side surface of the vertical deflection coil 3 comes into contact with the tip surface of the uneven portion T (the jetty 10D). Here, the position regulating means 9 and the adhesive application portion 10 are as follows:
In order to maintain the horizontality of core 2 with respect to the tube axis,
The dimensions, shape, etc. are set in advance, and the uneven portion T (projection 10D) provided on the main portion 10B of the adhesive application portion 10 is closer to the vertical deflection coil 3 than the support piece 9B of the position regulating means 9. It is formed on the front end enlarged portion 41 side of the bobbin 4 (shifted in the tube axis direction) by the amount of the winding thickness. A locking piece 11 that locks the tail end edge 2B of the core 2 is formed on the front surface 42A of the enlarged rear end portion 42 of the bobbin 4, corresponding to the non-wound portion 2A of the vertical deflection coil 3 of the core 2. Ru. As shown in FIG. 5, the locking piece 11 stands vertically from the surface of the main body 43 of the bobbin 4 with a spring property, and connects the tail end edge 2B of the core 2 to the locking piece 11.
1 to restrict the position of the core 2 on the rear side of the bobbin 4. In the figure, pieces 11A and 11B attached to the locking piece 11 are for reinforcing the locking piece 11 and forming a lead wire insertion groove S. Reference numeral 12 denotes an adhesive applied to the adhesive application portion 10 provided on the bobbin 4, and the uneven portion T (projection 1) formed on the main portion 10B of the adhesive application portion 10
vertical deflection coil 3.
It is adhesively fixed to the adhesive-applied portion 10 (bobbin 4) of the front portion 3A.

In the deflection yoke having such a configuration, the core 2 having the vertical deflection coil 3 wound in a toroidal manner around the outer periphery is arranged on the outer surface of the bobbin 4, and the horizontal deflection coil 5 wound in a saddle shape is housed in the inner surface of the bobbin 4. The deflection yoke 1 is configured by arranging the deflection yoke 1. At this time, the head end edge 2A1 of the non-wound part 2A of the vertical deflection coil 3 of the core 2 comes into contact with the surface of the support piece 9B of the position regulating means 9 formed on the back surface 41A of the front end enlarged part 41 of the bobbin 4. The position is regulated by the tail end edge 2 of the core 2.
B is also regulated in position by being engaged with a latching piece 11 erected on the surface of the main body 43 of the bobbin 4, and the core 2 is kept horizontal with respect to the tube axis via the position regulating means 9. It is arranged on the outer surface of the bobbin 4 in this state. While the horizontality of the core 2 is maintained, adhesive 12 is applied to the adhesive application part 10 provided on the bobbin 4, and the front part 3A of the vertical deflection coil 3 wound around the core 2 and the adhesive application part are applied. 10, that is, the bobbin 4, are adhesively fixed, and the core 2 is fixed to the outer surface of the bobbin 4. At this time, the adhesive 12 is prevented from flowing away by the flange 10A of the adhesive application portion 10, and the adhesive 12 is kept in the gap between the uneven portions T (between the jetties 10D) formed on the main portion 10B.
2 enters the front part 3 of the vertical deflection coil 3.
A is completely and firmly adhesively fixed to the bobbin 4, and the core 2 is fixed to the outer periphery of the bobbin 4 with its levelness maintained by the adhesive fixation.

In one embodiment of the deflection yoke of the present invention,
As described above, the position regulating means provided on the back of the enlarged front end of the bobbin is composed of a column and a flat supporting piece. The configuration of the position regulating means is not limited to the embodiment and can be modified as appropriate as long as the horizontality of the core is maintained. Furthermore, the configuration of the adhesive-applied portion provided at a position substantially perpendicular to the position regulating means is not limited to the embodiments as long as an uneven portion is formed on the surface that the front side surface of the vertical deflection coil contacts. It's not something you can do.

As described above, the deflection yoke of the present invention includes a core, a vertical deflection coil wound toroidally around the outer circumference of the core, and a cross-shaped horizontal deflection coil attached to the inner surface of the core via a bobbin. In the deflection yoke, a pair of position regulating means are provided on the back surface of the enlarged front end portion of the bobbin so that the head edge of the core comes into contact diagonally with the non-wound portion of the vertical deflection coil of the core. At the same time, the front side of the vertical deflection coil abuts at a position substantially orthogonal to the position regulating means on the back surface of the enlarged front end portion of the bobbin corresponding to the winding portion of the vertical deflection coil of the core, and an uneven portion is formed on the abutting surface. A pair of adhesive-applied parts are provided, and due to the combination of the position regulating means and the adhesive-applied parts, variations in the dimensions of the core are absorbed on the tail side of the core, and the core is attached to the head of the core. The core is fixed with adhesive with its position regulated on the side, and the core is fixed to the outer periphery of the bobbin so that it is always kept horizontal with respect to the tube axis without tilting. As a result, good deflection characteristics can be obtained extremely easily. In addition, by providing an uneven part on the adhesive application area, the adhesive bites into the application area better, and the core (vertical deflection coil) and bobbin are more securely bonded and fixed.
It is made strongly so that the horizontality of the core is maintained without changing over time, and as a result, it is possible to maintain good deflection characteristics.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a deflection yoke mounted on a cathode ray tube according to an embodiment of the present invention;
Figure 2 is a rear view of the deflection yoke, Figure 3 is a side view of the bobbin that also forms part of the deflection yoke, Figure 4 is a sectional view taken along the - line in Figure 3, and Figure 5 is a rear view of the bobbin. FIG. DESCRIPTION OF SYMBOLS 1... Deflection yoke, 2... Core, 3... Vertical deflection coil, 4... Bobbin, 41... Bobbin front end enlarged part, 2A... Core non-winding part, 9... Position regulating means, 10... Adhesive application part, T...uneven part.

Claims (1)

[Scope of utility model registration request] In a deflection yoke comprising a core, a vertical deflection coil toroidally wound around the outer circumference of the core, and a cross-shaped horizontal deflection coil attached to the inner surface of the core via a bobbin, the front end of the bobbin is enlarged. A pair of position regulating means are provided on the back surface of the core, in which the head edge of the core abuts diagonally in correspondence with the non-wound portion of the vertical deflection coil of the core, and A pair of adhesives, the front side of the vertical deflection coil being in contact with a position substantially perpendicular to the position regulating means on the back surface of the front end enlarged part of the bobbin corresponding to the winding part, and a concave and convex portion being formed on the corresponding surface. A deflection yoke characterized by having a agent application part.