JPS5810288Y2 - 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.

As the deflection yoke mounted on the cathode ray tube has improved, Kinpei has developed an optimal deflection yoke that is installed on the cathode ray tube, without using a convergence yoke, by simply moving the deflection yoke body slightly in the front and back direction relative to the tube axis. So-called swing-less self-convergence type devices have been developed that can obtain convergence characteristics and optimal purity characteristics.

In this case, it is necessary to have a mechanism that allows easy adjustment of the movement of the deflection yoke body in the longitudinal direction of the tube axis within a minute range, and to ensure that the fixation is secure and strong after installation and fixation. It is required.

The present invention relates to a deflection yoke developed in view of the above-mentioned matters, and more particularly to a self-convergence type deflection yoke with no oscillation, which is equipped with a mechanism for slightly moving the deflection yoke body in the front and rear directions 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 includes a core 2, a vertical deflection coil 3 wound toroidally around the outer circumference of the core 2, and a bobbin made of an insulating material attached along the inner surface of the core 2. 4, a cross-shaped horizontal deflection coil 5 attached to the inner surface of the bobbin 4, a tightening piece 6 formed on the tail side of the bobbin 4, and a tightening means 7 for reducing the diameter of the tightening piece 6. The clamping piece 6 is placed on the surface of the enlarged portion 8A of the cathode ray tube 8.
It is attached and fixed via the tightening means 7.

In the deflection yoke main body 1, the bobbin 4 is formed by joining a pair of semi-annular bobbins 4A and 4B to each other, as shown in FIGS. 2 and 3, and corresponds to the window portion 5A of the horizontal deflection coil 5. Position of funnel-shaped part 4R of bobbin 4 (semi-annular bobbin 4A
・At a position corresponding to the joint S of 4B), a pair of cut grooves 9 are provided along the tube axis direction in a symmetrical manner with respect to the tube axis center O, and each cut groove 9 is made of rubber, elastic plastic, etc. An elastic piece 10 made of an elastic material is slidably engaged along the cut groove 9.

Here, the elastic piece 10 has an upper piece 10A as shown in FIG.
・It is composed of a connecting piece 10B and a lower piece 10C, and has a cross-sectional shape, and the upper piece 10A and the lower piece 10C hold both sides of the cut groove 9 of the bobbin 4, and the lower surface 1 of the lower piece 10C
0C1 is engaged with the cut groove 9 while in contact with the surface of the enlarged portion 8A of the cathode ray tube 8.

In the deflection yoke having such a configuration, the elastic piece 10 is relatively slid in the tube axis direction along the cut groove 9, and the deflection yoke main body 1 is slightly moved in the front and back direction with respect to the tube axis. When the optimum position (position where optimum convergence characteristics and optimum purity characteristics can be obtained) is reached,
The tightening means T reduces the diameter of the tightening piece 6 and fixes it.

At this time, if the elastic piece 10 is moved forward along the cut groove 9 (to the side of the enlarged part 8A of the cathode ray tube 8), the deflection yoke main body 1 will be moved backward with respect to the tube axis, and the elastic piece 10 If the deflection yoke body 1 is moved backward along the cut groove 9, the deflection yoke body 1
moves forward with respect to the tube axis, and according to the relative movement of the elastic piece 10, the deflection yoke body 1 does not tilt with respect to the tube axis, and the center axis of the deflection yoke body 1 always coincides with the tube axis. It moves slightly in the front and rear directions while holding the seat.

In one embodiment of the present invention, the vertical deflection coil is wound around the core in a toroidal shape, but the horizontal deflection coil may also be wound around the outer surface of the bobbin in a saddle shape at the same time. It's a good thing.

In addition, in one embodiment of the present invention, a pair of grooves were provided symmetrically with respect to the tube axis center at a position corresponding to the joint of the semi-annular bobbin, but this also corresponds to the window of the horizontal deflection coil. Of course, it can be applied even when there is no joint at the funnel-shaped part of the bobbin (for example, when using an annular bobbin).
The shape of the bobbin is not limited to the examples, as long as the cut grooves are provided symmetrically on the tube axis), and the number of cut grooves installed is also two pairs symmetrically with respect to the center of the tube axis. (as shown by diagonal lines in FIG. 2), and an elastic piece may be engaged with each cut groove. According to such a structure, the movement adjustment and the number of adjustment of the deflection yoke body can be fixed. This will be achieved more reliably.

Furthermore, as shown in FIG. 5, a plurality of grooves M may be provided on the lower surface 10C1 of the lower piece 10C as elastic pieces that engage with the cut grooves of the bobbin. The elasticity of the contact portion is further increased, allowing for more delicate movement adjustment of the deflection yoke body.

Then, change the shape of the lower piece 10C of the elastic piece 10 to the front 10C.
By forming it thicker at A and thinner at the rear 10CB, movement in the cut groove 9 can be achieved even more smoothly.

As described above, according to the deflection yoke of the present invention, the funnel-shaped portion of the bobbin corresponding to the window portion of the horizontal deflection coil is provided with a cut groove along the tube axis direction symmetrically with respect to the center of the tube axis. An elastic piece is slidably engaged with the yoke, and the deflection yoke body can be moved slightly in the front and rear directions with respect to the tube axis simply by moving the elastic piece in the front and back direction along the cut groove. With a simple configuration and simple operation, the deflection yoke body can always be placed at the optimal position on the cathode ray tube, and optimal convergence and purity characteristics can be obtained extremely easily.

Also, 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 through three points: an elastic piece on the front side, and a tightening piece/clamping means on the rear side.The fixation is ensured and strong, and there is no risk of positional displacement. It has various effects such as being able to continuously obtain stable deflection characteristics without any oscillation, and is extremely effective in practice as a self-convergence type deflection yoke without oscillation.

[Brief explanation of drawings]

Figure 1 is a cross-sectional side view of a deflection yoke according to an embodiment of the present invention, Figure 2 is a front view, Figure 3 is a side view of a bobbin, Figure 4 is a perspective view of an elastic piece, and Figure 5 is a side view of a deflection yoke according to an embodiment of the present invention. FIG. 2 is a perspective view of an elastic piece seen from the bottom side in another embodiment of the present invention. 1...Deflection yoke body, 4...Bobbin, 4R...Bobbin funnel, 5...Horizontal deflection coil, 5A... horizontal deflection coil window,
9... Cut groove, 1o... Elastic piece.

Claims (1)

[Scope of utility model registration request] A cut groove is provided in the funnel-shaped part of the bobbin corresponding to the window part of the horizontal deflection coil along the tube axis direction symmetrically with respect to the center of the tube axis.
A deflection yoke characterized in that an elastic piece is slidably engaged with the cut groove.