JPS5829557Y2 - 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 in accuracy, the deflection yoke has been mounted on the cathode ray tube by using wedges etc.
A so-called swing-less type has been developed that can obtain good naconvergence characteristics by performing movement adjustment (convergence adjustment) in the left and right direction.

However, in this case, it is difficult to always obtain good purity characteristics due to variations in the arrangement of electrons in the CRT. The deflection yoke itself can be easily adjusted for movement in the longitudinal direction of the tube axis without impairing convergence characteristics, and can be subjected to impact tests and heat resistance tests after movement adjustment. , or is not affected by changes over time, etc.
It is particularly desirable to provide a mechanism for firmly holding and fixing the deflection yoke without tilting it 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 supports and fixes the deflection yoke after adjustment. The present invention relates to a deflection yoke equipped with a deflection yoke.

An embodiment of the present invention will be described in detail below 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 in a troital shape on the outer circumferential surface of the core 2, and a vertical deflection coil 3 mounted along the inner surface of the core 2. It consists of a bobbin 4 made of insulating material, a horizontal deflection coil 5 wound in a saddle shape on the inner surface of the bobbin 4, and a plurality of tightening tongues 6 formed on the tail side of the bobbin 4. It is mounted and fixed onto a cathode ray tube 8 using a tightening band 7 attached to the outer periphery of the tongue piece 6.

In the deflection yoke 1, a substantially square support member 9 made of a spring material such as phosphor bronze is fixed to the inner surface of the head flange portion 41 of the bobbin 4 attached along the inner surface of the core 2.

As shown in FIG. 3, the support member 9 has four sides 9A of the same size,
It is composed of 9B, 9C, and 9D, and a bulge 10 is formed at a part of the corner connecting each side to allow uniform expansion and contraction of the support member 9 in the radial direction.

Here, the support member 9 is fixed to the inner surface of the head flange portion 41 of the bobbin 4 by crimping the bulging portion 10 to the inner surface of the head flange portion 41. By providing a groove, a recess, etc. in which a part of the bulge 10 engages, the fixation can be made more securely and firmly.

Moreover, each side 9A, 9B of the support material 9. A support piece 9 is attached to the head flange portion 4 of the bobbin 4 approximately in the center of each of the bobbin 4.
1 is provided with a protrusion 11 that protrudes toward the surface of the cathode ray tube 8 when fixed to the inner surface of the cathode ray tube 8, and each side 9A, 9B
, 9C.

A roller 12 made of an elastic material such as rubber is rotatably mounted on the protrusion 11 of 9D.

As shown in FIG. 4, the roller 12 is provided with a shaft hole 12A in the center through which the protrusion 11 of the support member 9 is inserted, and a notch 12B is provided in the shaft hole 12A from the surface. It is mounted on each protrusion 11 of the support member 9 via.

The inner diameter of the shaft hole 12A of the roller 12 is set to be approximately equal to the outer diameter of the protrusion 11 in order to prevent the roller 12 from shaking on the protrusion 11.

In the deflection yoke having such a configuration, the deflection yoke 1 is attached to the cathode ray tube 8 with the supporting member 9 on which the roller 12 is attached being crimped and fixed to the inner surface of the head flange portion 41 of the bobbin 4.
Attach it on top.

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, the rollers 12 attached to each side 9A, 9B, 9C, and 9D of the support member 9 rotate and move on the surface of the cathode ray tube 8, and the support member 9 is moved by the spring force of the support member 9 itself and
Due to the bulging part 10 formed in a part of the corner connecting each side, the deflection yoke 1 expands (expands) in the radial direction when moving forward, depending on the diameter of the cathode ray tube 8, and expands in the rearward direction. narrows (contracts) in the radial direction when moving to
The deflection yoke 1 does not tilt (swing) with respect to the tube axis and maintains good convergence characteristics.
The movement is adjusted by expansion/contraction (spring force) of the support member 9.

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 head side of the deflection yoke 1 is attached to the support member 9. ,
The tail side is supported by a tightening tongue piece 6 and fixed onto a cathode ray tube 8.

In one embodiment of the deflection yoke of the present invention, the supporting material fixed to the inner surface of the head flange of the bobbin is constructed in a substantially square shape with four sides, and a roller is attached to each side. However, the shape of the support material is not limited to the thin tube embodiment, and as long as it expands and contracts evenly in the radial direction as the deflection yoke moves, it may be triangular or pentagonal with an equal number of sides. can be increased or decreased as appropriate.

Further, as shown in the embodiment, the supporting material may be constructed in a continuous shape without any breaks, or may be constructed by dividing it into an appropriate number.

Furthermore, as shown in FIGS. 5 and 6, a roller is provided on the side wall of the head flange portion 41 of the bobbin 4 in the direction of the center of the tube axis, corresponding to the position of the rollers 12 attached to each side of the support member 9. Projection plate 4
1A, and each end of the protrusion 11 of the support member 9 on which the roller 12 is attached may be brought into contact with the surface of the protrusion plate 41A. In this case, the roller 12 may be inserted into the bobbin 4 The cathode ray tube 8 of the tag roller 12 is prevented from entering.
Rotation on the surface becomes smooth, expansion and contraction of the support member 9 is accomplished efficiently, and movement adjustment and support of the deflection yoke are made more effective.

As described above, according to the deflection yoke of the present invention, a spring support member that expands and contracts uniformly in the radial direction is fixed to the inner surface of the head flange of the bobbin, and the CRT surface is fixed to each side of the support member. When the deflection yoke is mounted and fixed on the cathode ray tube, the movement of the deflection yoke in the longitudinal direction of the tube axis can be adjusted by expanding and contracting the supporting material. It is extremely easy to use, has a simple and inexpensive configuration, and can improve the deterioration of the purity characteristics caused by variations in cathode ray tubes.
Good purity characteristics can always be obtained.

Further, by adjusting the spring force of the support member, the movement range of the deflection yoke can be widened, and the amount of adjustment can be increased.

Furthermore, the deflection yoke is supported and fixed to the cathode ray tube at two locations: the head side (at the location of the roller provided on the support material) and the tail side (at the location of the tightening tongue). The deflection yoke does not tilt (oscillate) with respect to the tube axis even after adjustment, and can maintain good deflection characteristics (purity characteristics, convergence characteristics, etc.). This effect is extremely effective as a non-shaking type 'nn joke.

[Brief explanation of the drawing]

Fig. 1 is a partially cross-sectional side view of a deflection yoke mounted on a cathode ray tube according to an embodiment of the present invention, Fig. 2 is a front view of the deflection yoke, and Fig. 3 is a roller mounted on a supporting member. FIG. 4 is a perspective view of the roller, FIG. 5 is a front view of a deflection yoke according to another embodiment of the present invention, and FIG. 6 is a perspective view of the main parts. 1...Deflection yoke, 4...Bobbin, 4
DESCRIPTION OF SYMBOLS 1... Head flange part, 8... Braun tube, 9... Support material, 12... Roller.

Claims (1)

[Scope of utility model registration request] A spring supporting material consisting of at least three sides that expands and contracts evenly in the radial direction is fixed to the inner surface of the head flange of the bobbin, and a roller is attached to each side of the supporting material to come into contact with the surface of the cathode ray tube. A deflection yoke featuring