JPH0950774A - Deflecting yoke fixing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the deflection adjusting work of a deflecting yoke for a television picture tube, and to eliminate the dispersion of quality of images. SOLUTION: Plural fixed plate springs 17, of which one end 18 is connected to a large cover 15 and of which the other end 19 can abut on a cone of a cathode-ray tube 12, are provided along the periphery of the large cover 15 forming a case of a deflecting yoke 14. A fixing ring 22, which is formed into the ring-shape and of which inner peripheral part abuts on the other end side of the fixed plate springs 17 so as to push the other end 19 of the plate springs 17 to the cone of the cathode-ray tube 12, is provided along the outside of the plural fixed plate springs 17. With this structure using the ring 22 in place of a wedge member, the deflection adjusting work is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke fixing mechanism for correcting an electron beam of a television picture tube.

[0002]

2. Description of the Related Art An example of a conventional fixing mechanism for a deflection yoke is shown in FIG. That is, in this conventional device, first, the cathode ray tube 2 is attached from the back surface of the television cabinet 1, and then the deflection yoke 4 is attached from the neck portion 3 side of the cathode ray tube 2.
The deflection yoke 4 is covered by a skilled worker who slightly tightens the ring-shaped tightening band 5 made of stainless steel.
Is temporarily fixed to the neck portion 3 in a roughly adjusted state. Next, in order to make a full-scale adjustment, a skilled worker inserts and fixes a plurality of rubber wedge members 6 into the gap between the cone of the cathode ray tube 2 and the large plastic cover 7 on the outer peripheral portion of the case of the deflection yoke 4. Then, the best point for adjusting the deflection angle of the deflection yoke 4 is obtained. The wedge member 6 is arranged at a position corresponding to a corner of the image receiving portion of the cathode ray tube 2. Then, by additionally tightening the tightening band 5 at this best point, the correction of the deflection angle is completed. A double-sided adhesive tape is attached to the wedge member 6, and the wedge member 6 is fixed at a predetermined position by peeling and mounting the double-sided adhesive tape mount.

[0003]

However, in such a conventional fixing mechanism, a skilled worker requires a labor for the deflection adjustment work by inserting the wedge member 6, and the deflection adjustment tends to vary. This may lead to variations in image quality.

Therefore, an object of the present invention is to solve the above problems in the prior art so that the deflection adjustment work can be easily performed and the image quality does not vary. To do.

[0005]

In order to achieve the above-mentioned object, the present invention has one end connected to this case and the other end to a cone of a television picture tube along the outer peripheral portion of the case of the deflection yoke. A plurality of fixed leaf springs that can come into contact with each other are provided, and are formed in a ring shape at positions along the outer sides of the plurality of fixed leaf springs, and the inner peripheral portion of the fixed leaf spring is on the other end side of the fixed leaf spring. A fixing ring is provided which abuts and presses and fixes the other end of the leaf spring to the cone of the television picture tube.

With such a structure, since the other end of each fixed plate spring is pressed and fixed to the cone of the television picture tube by the fixing ring, it is deflected as compared with the conventional wedge member inserted. The adjustment work is easy, and thus stable deflection angle correction without variation in image quality can be performed quickly, easily and easily.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. Here, a deflection yoke 14 for electron beam correction is covered from the neck portion 13 of the cathode ray tube 12 attached to the television cabinet 11. This deflection yoke 14 is located outside one end of the case,
It has a large plastic cover 15. The deflection yoke 14 that covers the neck portion 13 of the CRT 12
Is set to a fixed position, and then the tightening band 16 is temporarily tightened to perform the rough adjustment. The tightening band 16 has a ring-shaped screw tightening structure made of stainless steel. The deflection yoke 14 has a small plastic cover 21 at the other end.

Fixed leaf springs 17 are provided at a plurality of positions along the circumferential direction of the large cover 15, respectively. Each fixed leaf spring 17 is made of a plastic S-shaped material, and one end portion 18 thereof is formed integrally with the large cover 15. A notch 20 is formed at the center of the other end 19 of the fixed leaf spring 17 so that the fixed leaf spring 17 can easily contact the cone of the cathode ray tube 2.

A fixing ring 22 is arranged at an outer peripheral position along the outer sides of the plurality of fixing leaf springs 17. The fixing ring 22 is made of a plastic material, and has a polygonal shape corresponding to the number of the fixing leaf springs 17 in the circumferential direction. A plate-shaped projection 23 that projects inward in the radial direction is integrally formed with the main body of the fixing ring 22 at the corner of the polygon. A pair of thin connecting portions 24 are formed at the tip of the protrusion 23.
A rectangular recess 25 is formed between them. The width of the recess 25 is formed larger than the width of the fixed leaf spring 17.

As shown in FIG. 3, the large cover 15, the fixed leaf spring 17, and the fixing ring 22 are previously integrally formed of the same plastic material. That is, as described above, the fixed leaf spring 17 is formed integrally with the large cover 15 by the one end portion 18, and the fixing ring is also provided.
22 is formed integrally with the large cover 15 by connecting the tip of the connecting portion 24 to the outer peripheral surface of the large cover 15. However, the connection part 24 is
The portion connected to the large cover 15 is configured to be easily broken, whereby the fixing ring 22 is configured to separate from the large cover 15.

According to this structure, after the tightening band 16 is temporarily tightened as described above to perform the rough adjustment, the protrusion 23 of the fixing ring 22 is inserted from the neck portion 3 side of the cathode ray tube 2. Push to separate the connection 24 from the large cover 15. Then, the fixing ring 22 is rotated to move the protrusion 23 to the fixing leaf spring 17
Position, and then push the fixing ring 22 in the direction away from the neck portion 13
25 is brought into contact with the fixed leaf spring 17. By further pressing the fixing ring 22 in this state, the other end 19 of each fixing leaf spring 17, that is, the side on which the notch 20 is formed, is brought into contact with the cone of the CRT 12, and in this state, the fixing ring 22 is used for fixing. Leaf spring
Hold 17 in pressure. Then, by tightening the tightening band 16 at the best point of adjusting the deflection angle of the deflection yoke 14,
The deflection adjustment is completed.

With this arrangement, since the other end 19 of each fixed leaf spring 17 is simply pressed and fixed to the cone of the cathode ray tube 12 by the fixing ring 22, the deflection adjustment work can be easily performed. Therefore, stable deflection angle correction without variation in image quality can be performed quickly, easily and easily. Further, since the polygonal fixing ring 22 is pushed from the neck portion 13 side, even if the center of the cathode ray tube 12, the center of the deflection yoke 14 and the center of the fixing ring 22 are not all aligned, this polygon The fixing leaf spring 17 can be reliably fixed by the deformation of the shaped fixing ring 22. (Second Embodiment) FIGS. 5 to 7 show a second embodiment of the present invention. Here, the large cover 15 is made of a plastic material, but the fixed leaf spring 17 and the fixing ring 22 are made of an appropriate material such as a metal material or a plastic material. Further, the large cover 15, the fixed leaf spring 17, and the fixing ring 22 are separately configured in advance. The large cover 15 is integrally formed with a pair of protrusions 27 having an L-shaped cross section to form a leaf spring accommodating groove 28. The leaf spring accommodating groove 28 is fixed to the plurality of leaf spring accommodating grooves 28 in the circumferential direction. The fixed leaf springs 17 are configured to be connected to the large cover 15 by inserting and housing the one end portion 18 thereof. The fixing ring 22 is formed of an annular body having an L-shaped cross section.

According to this structure, after the one end portion 18 of the fixed leaf spring 17 is housed in the plurality of housing grooves 28 in the large cover 15 of the deflection yoke 14, the deflection yoke 14 is installed from the neck portion 13 side of the cathode ray tube 12. Cover from the large cover 15 side. After that, the deflection yoke 14 is set at a fixed position, and the tightening band 16 is temporarily tightened to perform rough adjustment. Next, while pushing the fixing ring 22 to bring the other ends 19 of the plurality of fixing leaf springs 17 into contact with the cone of the CRT 12, the fixing leaf 22 is fixed by the fixing ring 22 at the best point of adjusting the deflection angle of the deflection yoke 14. While tightening and fixing 17 and tightening the tightening band 16, the deflection adjustment is completed.

[0015]

As described above, according to the present invention, a plurality of fixed leaf springs, one end of which is connected to the case of the deflection yoke and the other end of which can be brought into contact with the cone of the television picture tube, are provided. A fixing which is formed in a ring shape at a position along the outer side of the plurality of fixed plate springs, and whose inner peripheral portion abuts against the other end side of the fixed plate springs to press and fix the fixed plate springs to the cone of the television picture tube. Since it has a construction ring, the deflection adjustment work is easier than the conventional one in which a wedge member is inserted, and stable deflection angle correction without variation in image quality can be performed quickly, easily and easily. You can

According to the present invention, the case, one end of the fixed leaf spring and the fixing ring are integrally formed in advance,
In addition, by disconnecting the integral connection part for the fixing ring to separate this fixing ring and then arranging this fixing ring so that it can be placed at a position along the outside of the fixing leaf spring, It is possible to reduce man-hours and the number of parts.

Further, according to the present invention, the case, the fixed leaf spring, and the fixing ring are separately formed in advance and made of the same or different materials, so that the respective parts can be easily manufactured. Therefore, it is possible to expect a reduction in capital investment.

Further, according to the present invention, the fixing ring is deformed so that the other end of the leaf spring is pressed and fixed to the cone of the television picture tube, whereby the television picture tube, the deflection yoke, and the fixing ring. Even if their centers do not match, all of the plurality of fixing springs can be tightly fixed by tightly adhering to the cone of the picture tube.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a first embodiment of a deflection yoke fixing mechanism of the present invention.

FIG. 2 is an enlarged perspective view of a fixing mechanism of the deflection yoke shown in FIG.

FIG. 3 is a view showing a large cover, a fixed leaf spring, and a fixing ring that are integrally formed.

FIG. 4 is a view showing a mounting state of a deflection yoke.

FIG. 5 is a perspective view showing a second embodiment of a deflection yoke fixing mechanism of the present invention.

FIG. 6 is a diagram showing a large cover in FIG.

FIG. 7 is a view showing a fixing ring in FIG.

FIG. 8 is an external perspective view showing a conventional fixing mechanism of a deflection yoke.

[Explanation of symbols]

 12 CRT 14 Deflection yoke 15 Large cover 17 Fixed leaf spring 22 Fixing ring 23 Projection

Claims (9)

[Claims] 1. Along the outer peripheral portion of the case of the deflection yoke,
A plurality of fixed leaf springs, one end of which is connected to this case and the other end of which is capable of contacting the cone of the television picture tube, are provided at positions along the outside of the plurality of fixed leaf springs.
A fixing ring formed in a ring shape, the inner peripheral portion of which abuts against the other end of the fixed plate spring to press and fix the other end of the plate spring to the cone of the television picture tube. Deflection yoke fixing mechanism characterized by. 2. The deflection yoke fixing mechanism according to claim 1, wherein the case and the fixed plate spring are integrally formed. 3. A case, one end of a fixed leaf spring, and a fixing ring are integrally formed in advance, and an integral connecting portion for the fixing ring is separated to make this fixing ring a separate body. 3. The deflection yoke fixing mechanism according to claim 1, wherein the fixing ring is arranged at a position along the outer side of the fixed leaf spring. 4. The deflection yoke according to claim 1, wherein a protrusion for pressing and fixing each fixing plate spring is formed on the inner circumference of the fixing ring. Fixing mechanism. 5. The fixing mechanism for the deflection yoke according to claim 3, wherein the protrusion of the fixing ring has an integral connecting portion for disconnection. 6. The deflection according to claim 4, wherein the fixing ring is formed in a polygonal shape corresponding to the number of the fixed leaf springs, and the protrusions are formed at corners of the polygonal shape. Yoke fixing mechanism. 7. The fixing mechanism for a deflection yoke according to claim 1, wherein the case, the fixed leaf spring, and the fixing ring are previously formed separately and made of the same material or different materials. 8. A case is formed with an accommodating portion for a fixed leaf spring, and the fixed leaf spring is connected to the case by having one end thereof accommodated in the accommodating portion. The deflection yoke fixing mechanism according to claim 7. 9. The deflection yoke according to claim 1, wherein the fixing ring presses and fixes the other end of the leaf spring to the cone of the television picture tube by deforming. Fixing mechanism.