JPS5810289Y2 - deflection yoke - 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 or the like.

In recent years, as the deflection yoke mounted on the cathode ray tube has improved, the accuracy of the cathode ray tube and deflection yoke has improved, and by simply moving the deflection yoke body slightly in the front and back direction relative to the tube axis, the optimum deflection yoke can be achieved without using a convergence yoke. A so-called oscillating, relay-self-convergence type device has been developed that can obtain convergence characteristics and optimal purity characteristics.

In this case, it is necessary to have a mechanism that allows the movement of the deflection yoke body to be easily adjusted in the longitudinal direction of the tube axis within a minute range, and after adjusting the movement, the fixation is ensured and strong, and the deflection yoke body is displaced. It is required that you do not do so.

The present invention relates to a deflection yoke made in view of the above-mentioned matters, and more particularly to a swingless self-convergence type deflection yoke equipped with a mechanism for slightly moving the deflection yoke main body in the longitudinal direction with respect to the tube axis.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In Fig. 1, 1 is a deflection yoke body, which consists of a core 2, a vertical deflection coil 3 wound toroidally around the outer circumference of the core 2, and an insulating material attached along the inner surface of the core 2. It is equipped with a bobbin 4 and a horizontal deflection coil 5 wound in a saddle shape on the inner surface of the bobbin 4, and a tightening tongue piece 6 formed on the tail side of the bobbin 4 is used to tighten a tightening band or the like. It is reduced in diameter using the means 7 and is mounted and fixed on the surface of the enlarged portion 8A of the cathode ray tube 8.

In the deflection yoke main body 1, the bobbin 4 having the horizontal deflection coil 5 on its inner surface is made by joining a pair of semi-annular bobbins 4A and 4B to each other, as shown in FIG. It is attached to the inner surface of the bobbin 4 while straddling the joint S of the annular bobbins 4A and 4B.

At a position on the inner surface of the funnel-shaped part 4R corresponding to the window part 5A of the horizontal deflection coil 5 of the bobbin 4 (a position corresponding to the joint part S of the semi-annular bobbins 4A and 4B), there is a pair of holes symmetrically with respect to the tube axis center 0. A bag portion 9 is provided.

Here, the bag portion 9 is formed by an abbreviated protrusion 10 provided on the inner surface of the funnel-shaped portion 4R of the bobbin 4, as shown in FIG.

The tip 10A of the protruding piece 10 forming the bag portion 9 is connected to the funnel-shaped portion 4.
It extends in the direction of the enlarged part while floating from the inner surface of R, has spring properties, and is provided at the joint S on the inner surface of the funnel-shaped part 4R of the semi-annular bobbins 4A and 4B.
4B to form the annular bobbin 4, the bag portion 9 is formed.

An elastic material 11 having elasticity such as rubber or elastic plastic is housed in a bag 9 provided on the inner surface of the funnel-shaped portion 4R of the bobbin 4, and is fixed by adhesion, engagement, etc. .

In the deflection yoke having such a configuration, the deflection yoke is fixed while the elastic material 11 is housed and fixed in the bag portion 9 provided on the inner surface of the funnel-shaped portion 4R of the bobbin 4 (corresponding to the window portion 5A of the horizontal deflection coil 5). Bra body 1.

Mount it on the run tube 8.

At this time, the lower surface of the bag part 9 comes into contact with the surface of the enlarged part 8A of the cathode ray tube 8, and the deflection yoke main body 1 is moved against the tube axis by the spring force of the bag part 9 and the elastic material 11 inside the bag part 9. The movement is adjusted in the front and back direction within a minute range, and when it reaches the optimum position on the cathode ray tube 8 (the position where the optimum convergence characteristic and optimum purity characteristic can be obtained), it is fixed by the tightening tongue piece 6 and the tightening means 7. is achieved.

At this time, since the bag portion 9 of the deflection yoke body 1 is provided symmetrically with respect to the tube axis center O, the center of the deflection yoke body 1 is always aligned with the tube axis without tilting with respect to the tube axis. It moves slightly in the front and back direction while being aligned.

In one embodiment of the present invention, the vertical deflection coil is wound around the core in a toroidal shape, but like the horizontal deflection coil, it can also be wound around the outer surface of the bobbin in a saddle shape. It is okay to do so.

In addition, in one embodiment of the present invention, a pair of bag portions are provided symmetrically with respect to the tube axis center at positions corresponding to the joints of semi-annular bobbins, and an elastic material is stored in the bag portions. , of course, can be applied even when there is no joint at the funnel-shaped part of the bobbin corresponding to the window of the horizontal deflection coil (for example, when using an annular bobbin). The shape of the bobbin is not limited to the examples, as long as it is provided with a bag portion (which stores the elastic material inside), and the number and number of bags that store the elastic material inside the bobbin are not limited to the examples.
Two pairs of positions may also be provided symmetrically with respect to the center of the tube axis, as shown by the dotted line in FIG. Fixation can be achieved more reliably.

Furthermore, the structure of the bag section provided on the inner surface of the funnel-shaped part of the bobbin is not limited to the embodiment as long as it has a shape that can accommodate the elastic material inside.For example, in order to increase the spring force, slits or Grooves or the like may be formed on the surface of the bag portion.

As described above, according to the deflection yoke of the present invention, at least one pair of bag portions are provided symmetrically with respect to the tube axis center on the inner surface of the funnel-shaped portion of the bobbin corresponding to the window portion of the horizontal deflection coil. When the deflection yoke body is mounted on the cathode ray tube, it moves slightly in the front and rear directions relative to the tube axis due to the spring force of the bag and the elastic material inside the bag. With a simple configuration and simple operation, the deflection yoke body can always be placed at the optimal position on the cathode ray tube, making it extremely easy to obtain optimal convergence and purity characteristics.

In addition, when the movement adjustment of the deflection yoke body is completed and the deflection yoke body is fixed on the cathode ray tube, the deflection yoke body
It is fixed onto the cathode ray tube via the bag on the enlarged side and the tightening tongue/clamping means on the tail side, so there is no risk of it shifting or tilting, and it maintains stable deflection characteristics. In particular, the practical effect as a self-convergence type deflection yoke without swinging is significant.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a deflection yoke according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a perspective view of a semicircular bobbin constituting the bobbin. 1...Deflection yoke body, 4...Bobbin, 4R...Bobbin funnel, 5...Horizontal deflection coil, 5A... horizontal deflection coil window,
9...Bag portion, 10...Elastic material.

Claims (1)

[Scope of utility model registration request] A deflection yoke characterized in that at least a pair of bag portions are provided symmetrically with respect to a tube axis center on the inner surface of a funnel-shaped portion of a bobbin corresponding to a window portion of a horizontal deflection coil, and an elastic material is housed in the bag portions.