JPS5829555Y2 - 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.

Recently, as the deflection yoke is mounted on the cathode ray tube, due to improvements in the accuracy of the cathode ray tube and the deflection yoke, the deflection yoke can be mounted on the cathode ray tube vertically and vertically with respect to the axis of the cathode ray tube through a wedge, etc.
A so-called swing-less type has been developed that can obtain good convergence characteristics without the need for movement adjustment (convergence adjustment) in the left-right direction.

However, in this case, it is difficult to always obtain good purity characteristics due to variations in the arrangement of electron guns in cathode ray tubes. Move in the direction (usually 2~
The deflection yoke itself can be easily adjusted for movement in the longitudinal direction of the tube axis without impairing the convergence characteristics, and after the movement adjustment, it can be subjected to various tests, changes over time, etc. It is particularly desirable to provide a mechanism that firmly holds and fixes the deflection yoke without being influenced by the tube axis and without tilting with respect to the tube axis.

The present invention relates to a deflection yoke that has been created in view of the above matters, and in particular, a mechanism that allows the deflection yoke to be adjusted in the longitudinal direction relative to the cathode ray tube axis without tilting the deflection yoke, and that firmly holds and fixes the deflection yoke after adjustment. The present invention relates to a deflection yoke equipped with a deflection yoke.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

In FIG. 1, 1 is a deflection yoke, which consists of a core 2, a vertical deflection coil 3 wound toroidally on the outer circumferential surface of the core 2, and an insulating material attached along the inner surface of the core 2. It consists of a bobbin 4, a pair of horizontal deflection coils 5 wound around the inner surface of the bobbin 4 in a saddle shape, and a plurality of tightening tongues 6 formed on the tail side of the bobbin 4. 6
It is mounted and fixed onto the cathode ray tube 8 using a tightening band T attached thereto.

Of the deflection yoke 1, the bobbin 4 on which the horizontal deflection coil 5 is mounted on a circular surface is formed by joining a pair of semi-annular bobbins 4A and 4B to each other, as shown in FIGS. 2 and 3. On the front side of the crossover wire storage section 41, positions corresponding to the respective windows 51 of the horizontal deflection coils 5 (semi-annular bobbins 4A and 4B)
(near each joint S), a flat plate-shaped fixing part 9 that is continuous with the funnel-shaped bobbin body 42 and parallel to the tube axis is formed symmetrically with respect to the center of the tube axis.

Continuous cuts 10 are formed in the fixed portion 9 of the bobbin 4 and a part of the bobbin main body 4A, symmetrically with respect to the center of the tube axis.

As shown in FIG. 4, the cut 10 is provided inward from the joint S, and the rectangular cut 10 is formed when the semi-annular bobbins 4A and 4B are joined.

Each of the cut ends 10 formed in the bobbin 4 is fitted with a holding piece 11 made of an elastic material such as rubber or elastic plastic, or a molded product such as Noryl.

As shown in FIGS. 5 to 7, the holding piece 11 has a lower surface 11A (a surface that comes into contact with the cathode ray tube 8) that matches the shape of the surface of the cathode ray tube 8, and a part of the holding piece 11 has an adhesive made of double-sided adhesive tape, adhesive, etc. A section 12 is provided, and cut grooves 13 are provided on both side surfaces of the cathode ray tube 8, which become parallel to the tube axis when abutted (fixed) on the surface of the cathode ray tube 8.
The bobbin 4 of the deflection yoke 1 is attached to the bobbin 4 of the deflection yoke 1 by fitting the side a1GA of the cut 10 formed in the fixing part 9.

In the deflection yoke having such a configuration, with the holding piece 11 attached to the cut end 10 of the bobbin 4, the deflection yoke 1 is fitted onto the cathode ray tube 8, and the holding piece 11 is attached onto the surface of the cathode ray tube 8 via the adhesive portion 12. Fix it.

Thereafter, the deflection yoke 1 is moved and adjusted in the front and back direction with respect to the tube axis of the cathode ray tube 8, and the purity is adjusted.

At this time, since the cut groove 13 of the holding piece 11 fixed to the surface of the cathode ray tube 8 and the side edge 10A of the cut cut 10 formed in the fixing part 9 of the bobbin 4 of the deflection yoke 1 are fitted together, As the deflection yoke 1 moves, the side edge 10A of the cut 10 moves within the cut groove 13 of the holding piece 11. Since the edge 10A is also parallel to the tube axis and the cut groove 13 of the holding piece 11 is also parallel to the tube axis, the deflection yoke 1 does not tilt (oscillate) with respect to the tube axis.
The movement is adjusted via the holding piece 11 while maintaining good convergence characteristics.

Then, when the deflection yoke 1 is moved to a position where good purity characteristics can be obtained, the diameter of the tightening tongue piece 6 is reduced using the tightening band 7, and the deflection yoke 1 is fixed onto the cathode ray tube 8. be.

In one embodiment of the deflection yoke of the present invention, the fixing part parallel to the tube axis is located near the front side of the crossover wire storage section at the tail of the bobbin, and is apparently enlarged in the radial direction from the upper bobbin body. As mentioned above, the fixing part can be formed at a position corresponding to the window of the horizontal deflection coil, if it is parallel to the tube axis and has a space and shape that allows the holding piece to be attached. - The configuration is not limited to the embodiment in any way; for example, various changes can be made, such as providing a step on the bobbin body or reducing it in the radial direction to form a fixing part.

Further, as shown in FIG. 8, a tail portion 14 is provided on the rear side of the holding piece 11 that is attached to the cut end of the fixing portion, and reaches the tightening tongue piece 6 of the bobbin 4. , the tail portion 15 may also be configured to be collinear at the same time. In this case, the holding piece 11 is firmly held and fixed, and the movement adjustment of the deflection yoke becomes more reliable.

As described above, according to the deflection yoke of the present invention, there is a fixed part continuous with the bobbin body and parallel to the tube axis on the front side of the tail crossover wire storage part of the bobbin corresponding to each window part position of the horizontal deflection coil. A series of cuts are formed in the fixed part and a part of the bobbin body, and a connecting part is formed on the lower surface, and a cut groove is formed on the side surface to fit with the side edge of the cut formed in the fixed part. The holding piece is attached to the cut end, and the movement of the deflection yoke in the longitudinal direction of the tube axis can be adjusted by attaching a holding piece formed in the fixing part of the bobbin to the cut groove of the holding piece fixed to the surface of the cathode ray tube via an adhesive. This can be done by fitting and moving the side edges of the cut end, and the adjustment work is extremely easy, and the purity characteristic can be improved with a simple and inexpensive structure, and good purity characteristics can always be obtained.

In addition, a fixing section is provided on the front side of the bobbin's tail crossover wire storage section, and the cut of the fixing section is used to adjust the movement of the deflection yoke, making it possible to widen the adjustment range due to shape and position. It is possible.

Furthermore, the bobbin and the holding piece maintain a fitted state,
Even after adjustment, the deflection yoke is stably fixed on the cathode ray tube without tilting with respect to the tube axis, improving reliability and maintaining good deflection characteristics (purity characteristics, convergence characteristics, etc.) It has various effects such as these, and is particularly effective in practice as a non-oscillating deflection yoke.

[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 mounted and fixed on the surface of a cathode ray tube, and Fig. 2'
is a front view of the deflection yoke, FIG. 3 is a side view of the bobbin, FIG. 4 is a perspective view of the same main part, FIGS. 5 and 6 are perspective views of the holding piece in an embodiment of the present invention, and FIG. Figure 7 is a cross-sectional front view of the deflection yoke showing the state in which the holding piece is attached.
The figure is a perspective view of a holding piece in another embodiment of the present invention. 1...Deflection yoke, 4...Bobbin, 4
1...Bobbin tail crossover wire storage section, 42...
...Bobbin body, 5...Horizontal deflection coil, 51
...Horizontal deflection coil window, 9...Fixing part, 10...Cut, 10A...Cut side edge, 11...Holding Piece, 12... Adhesive part, 13... Holding piece cut groove.

Claims (2)

[Scope of utility model registration request] (1) At the front side of the crossover wire storage area at the tail of the bobbin, which corresponds to each window position of a pair of horizontal deflection coils wound in a rectangular shape, there is a A fixing part is formed, and a series of cuts are formed in the fixing part and a part of the bobbin body, and the cut has an adhesive part on the side that comes into contact with the surface of the cathode ray tube, and the fixing part has adhesive parts on both sides. A deflection yoke characterized by being equipped with a holding piece having a cut groove that fits with the side edge of the cut cut. (2) The deflection according to claim 1 of the utility model registration, characterized in that a tail portion reaching the tightening tongue of the bobbin is provided on the rear side of the holding piece, and the tightening tongue and the tail are collinear. yoke.