JP2748976B2 - Deflection yoke fixing structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure for fixing a deflection yoke to a picture tube, and more particularly to a structure for fixing a deflection yoke on the funnel side.

[Conventional technology]

In the conventional deflection yoke fixing structure, the structure shown in FIG. 7 is mainly used. That is, the deflection yoke 1a of the deflection yoke 1
Is fixed to the neck portion 2a side of the picture tube 2 by a tightening band 3 and a tightening screw 4. On the funnel 2b side, a wedge 5 is inserted and fixed between the funnel 2b and the deflection yoke body 1a. In the figure, reference numeral 6 denotes a magnet device.

In addition, those related to this type of fixing structure include, for example, Japanese Utility Model Laid-Open Nos. 51-55224, 52-33215 and 52-68.
No. 118, No. 52-88517, and No. 53-144620.

[Problems to be solved by the invention]

In the above prior art, the deflection yoke 1 is fixed to the picture tube 2 by inserting the wedge 5, so that the reaction force at the time of inserting the wedge 5 causes the deflection yoke 1 to be displaced, resulting in poor convergence and poor pyrucity adjustment. There was a problem. In addition, it is necessary to apply an adhesive to the wedge 5 and then insert the wedge 5 along the surface of the funnel 2b. This requires complicated work and makes it difficult to automate the fixing of the deflection yoke.

On the other hand, recently, on the front end side enlarged portion of the deflection yoke bobbin, a ring portion fitted on the outer periphery of the front end side enlarged portion of the bobbin and a wall portion extending radially from the inner peripheral surface of the ring portion are provided. Deflection yoke fixing structure with a holder mounted and provided with a plurality of position adjustment mechanisms on the outer periphery of this holder by adjustment screws with the tip abutting on the funnel surface of the picture tube and movably attached to the back of the enlarged part As an example, there is a microfilm disclosed in Japanese Utility Model Application No. Sho 50-155990 (published as Japanese Utility Model Application Laid-Open No. 52-68118).

In the deflection yoke fixing structure disclosed in the microfilm of Japanese Utility Model Application No. 50-155990, the deflection yoke is attached to the picture tube by a plurality of position adjustment mechanisms provided with adjustment screws. Can be avoided, but since the adjustment screw is merely adjusted to the predetermined screwing position, if the adjustment screw is subjected to vibration or the like in a subsequent operation, the adjustment screw may be loosened. In addition, if the adjusting screw is loosened, there remains a problem that a displacement occurs after the deflection yoke is mounted.

An object of the present invention is to completely solve such a problem, and to provide a deflection yoke fixing structure which does not cause a displacement after mounting the deflection yoke and which can automate the mounting of the deflection yoke. .

[Means for solving the problem]

To achieve the above object, according to the present invention, an adapter is provided on the large-diameter side of a deflection yoke bobbin, which is provided on the outer periphery of a funnel surface of a picture tube. A deflection yoke for fixing a deflection yoke to a funnel surface of a picture tube by screwing a holding bolt whose tip reaches the funnel surface into three or more female screw portions and adjusting these holding bolts in the female screw portion. In the fixing structure, the holding bolt has a central hole for injecting adhesive that extends in the center in the length direction,
It has an umbrella part which is divided by a slit on the tip end side and expands in the radial direction.

[Action]

A holding bolt is screwed into the female screw portion of the deflection yoke body or the female screw portion fixed to the deflection yoke body in advance. Then, after adjusting the mounting position of the deflection yoke, first, the neck side of the deflection yoke body is fixed by, for example, a tightening band and a tightening screw as in the related art. Next, when the holding bolt is rotated and moved by a torque driver or the like, the tip of the holding bolt is pressed by a funnel at a constant pressure. That is, the deflection yoke can be fixed to the funnel portion of the picture tube by fastening the fastening portion on the neck portion side and the tip of the holding bolt.

After the deflection yoke is fixed, the adhesive is poured into the center hole of the holding bolt for injecting the adhesive, and the adhesive is filled in the umbrella part. Even if the holding bolt is adhered and fixed to the surface and then considerably vibrated, etc., is applied to the holding bolt, the holding bolt is not loosened and no displacement occurs after the deflection yoke is attached.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. An adapter 7 is fixed to the outer circumference of the conventional deflection yoke 1 on the side of the funnel portion 2b of the deflection yoke body 1a.

As shown in FIGS. 2, 4 and 5, the adapter 7 has a funnel insertion hole 7a having a diameter smaller than the outer diameter of the deflection yoke body 1a and having a size to be inserted into the funnel portion 2b. The main body 7b has eight pawls on its side, which engage with the inner side 1b (see FIG. 6) of the deflection yoke 1a.
7c is provided. Further, a protrusion 7d is provided on the opposite side of the side surface of the main body 7b, and a positioning notch groove 1c (see FIG. 6) for receiving the protrusion 7d is provided on the deflection yoke 1a. .

Accordingly, when the projection 7d is aligned with the notch groove 1c and the adapter 7 is pressed against the deflection yoke 1a, the tapered portion of the claw 7c is elastically expanded by the outer periphery of the deflection yoke 1a, and the tip of the claw 7c is When located on the inner side surface 1b of the deflection yoke body 1a, the claw 7c elastically returns and engages with the inner side surface 1b. That is, when the pawl 7c is engaged with the inner side surface 1b, the adapter 7 is
1a (deflection yoke 1) is integrally connected and is prevented from coming off. In addition, when the protrusion 7d enters the notch groove 1c, the horizontal, vertical, and rotational directions of the adapter 7 are positioned with respect to the deflection yoke body 1a. In this case, in order to improve the adhesion between the deflection yoke body 1 and the adapter 7, an adhesive is previously attached to a part of the inner wall of the main body 7b of the adapter 7 and assembled.

The main body 7b includes a main body 7b and a support 7e described later.
A rib 7f and a thickened portion 7g are provided for reinforcing the body, and a thickened portion 7h for reinforcement is provided on the other side surface of the main body 7b along the curvature of the funnel 2b. On the inner side surface of the rib 7f, a protrusion 7i that elastically engages with the outer periphery of the deflection yoke body 1a and absorbs the torsion of the deflection yoke body 1a and variations in the outer periphery.
Is provided. Further, a positioning notch 7j for performing horizontal positioning of the deflection yoke to be attached to the picture tube is provided on the outer periphery of the main body 7b, and this positioning notch 7j, when a raster is displayed on the picture tube,
The horizontal mounting position of the deflection yoke can be known from the displayed raster direction and the position of the positioning notch 7j. The four supports 7e provided on the main body 7b reinforced with the ribs 7f are provided with female screw portions 7k, and the axis of the female screw portion 7k is substantially perpendicular to the outer surface contact portion of the funnel portion 2b. .

A holding bolt 8 is screwed into the female screw portion 7k of the support 7e. As shown in FIGS. 2 and 3, the holding bolt 8 has a male screw portion 8a whose outer diameter portion is screwed with the female screw portion 7k.
It has a central hole for injecting adhesive in the center
8b is provided. A plurality of slits 8d communicating with the center hole 8b are provided at the distal end 8c.
The front end pad 9 made of an elastic material such as litter is press-fitted into the hole. An umbrella 8e for fixing the adhesive is provided on the outer periphery of the tip 8c side.
The umbrella portion 8e is provided with a slit 8f at a portion between the slits 8d. Here, the slit 8d is formed wider by the slit 8f. A drive groove 8g into which a torque driver or the like is inserted is provided at the rear end. A hole 8h is formed at a right angle in the middle of the center hole 8b.

Next, the fixing of the deflection yoke 1 to the picture tube 2 will be described. The male screw 8a of the holding bolt 8 to which the tip pad 9 is attached is screwed into the female screw 7k of the support 7e, and the holding bolt 8 is attached to the adapter 7 in advance. Next, the adapter 7 is attached to the deflection yoke body 1a as described above. In this case, if a magnet piece (not shown) is attached to the four sides (portions corresponding to the panel corners) of the outer periphery of the adapter 7 in advance, it is possible to adjust corner convergence, distortion, and the like by using the magnet piece. The above adjustment can also be made by inserting a magnet piece, iron piece or the like (not shown) into the pocket portion 71 between the ribs 7f of the adapter 7 in the same manner.

Therefore, after the adjustment of the position of the deflection yoke 1 is completed, the neck portion 1a side of the deflection yoke 1 is fixed with the tightening band 3 and the tightening screw 4 as in the related art. Next, when a torque screwdriver or the like is inserted into the drive groove 8g of the holding bolt 8 attached to the support 7e and the holding bolt 8 is rotated, the tip pad 9 is pressed against the funnel 2b with a constant pressure. In this case, since the tip pad 9 is made of an elastic member, it has good adhesion to the funnel 2b. That is, the deflection yoke 1 is caused by the tension between the tightening portion on the side of the neck portion 2a and the tip pad 9 of the holding bolt 8.
Is fixed to the funnel portion 2b of the picture tube 2.

Next, an adhesive (not shown) is press-fitted from the center hole 8b by an external force. In this case, the adhesive injected into the center hole 8b is a slit.
It enters the umbrella section 8e from 8d and flows toward the slit 8f. Here, since the slits 8d and 8f are not in the same direction and are out of position, the slit 8f is filled after the adhesive is filled in the umbrella portion 8e.
It flows to get out more. Therefore, the umbrella portion 8e is adhered to the funnel 2b and the holding bolt 8 is
Fixed to 2b. Also, a part of the adhesive filled in the center hole 8b has a threaded portion 7k from a hole 8h provided in an intermediate portion of the center hole 8b,
Since it flows to 8a, displacement of the screw portions 7K and 8a due to backlash or the like is prevented.

In the above embodiment, the case where four female screw portions 7k are provided on the adapter 7 and four holding bolts 8 are attached has been described. However, if the number of female screw portions 7k is three or more, the fixing function is sufficiently performed. be able to.

In the present embodiment, an example in which the adapter 7 is provided on the larger diameter side of the deflection yoke bobbin has been described. However, a deflection yoke bobbin in which the adapter 7 is integrally formed is used, and is substantially equivalent to a configuration in which the adapter 7 is provided. May be adopted. In this case, according to the configuration as in the present embodiment, there is an advantage that it can be attached to a deflection yoke bobbin having a known structure.

〔The invention's effect〕

According to the present invention, since the tip of the holding bolt is pressed against the funnel with a constant pressure and the deflection yoke is fixed, the displacement of the deflection yoke is reduced, and the convergence in the final adjustment and the poor adjustment of the pirity can be prevented. In addition, since the pressing bolt can be rotated by a torque driver or the like, the deflection yoke can be automatically fixed. Also, by using an adapter, it can be attached to a conventional deflection yoke.

Further, by fixing the deflection yoke body and the adapter by a fitting structure having a positioning portion, the adapter can be easily fixed to the deflection yoke body.

Further, by providing a positioning notch for adjusting the deflection yoke on the outer periphery of the adapter, the mounting position of the deflection yoke can be easily adjusted.

Also, correction adjustment can be performed by mounting a local adjustment magnet piece at a position corresponding to the four corners of the panel on the outer periphery of the adapter, or by providing a pocket portion for mounting the local adjustment magnet piece on the front side surface of the adapter, High-precision automatic adjustment is possible.

Also, if a tip pad made of an elastic material is provided at the tip of the holding bolt, the adhesion to the funnel is improved.

In addition, as an important effect of the present invention, since the center hole for injecting the adhesive is provided at the center of the holding bolt, the adhesive can be automatically supplied to the funnel surface through the center hole for injecting the adhesive.

Also, since an umbrella is provided at the tip of the holding bolt,
Since the adhesive is filled between the umbrella portion and the funnel surface, and the bonding area between the holding bolt and the funnel surface increases, the holding bolt is more firmly bonded and fixed to the funnel surface. In addition, by providing a lateral hole communicating with the male screw part from the adhesive injection center hole of the holding bolt, the adhesive is supplied to the male screw part, so that the mounting position of the deflection yoke due to the backlash of the screw part or the like. The displacement can be almost completely prevented.

Furthermore, by providing the position of the slit communicating with the adhesive reservoir portion from the adhesive injection center hole of the holding bolt and the position of the slit of the umbrella portion at different positions, the flow position of the adhesive is changed and the umbrella portion is changed. The inside is filled with the adhesive, and the fixing between the holding bolt and the funnel surface is securely performed, and the reliability of the bonding and fixing can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a deflection yoke fixing structure according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a main part of FIG. 1, and FIG. FIG. 4 is a rear view of the adapter, FIG. 5 is a sectional view taken along the line BB of FIG. 4, FIG. 6 is a partial perspective view of the deflection yoke body, and FIG. It is a side view of an example. DESCRIPTION OF SYMBOLS 1 ... Deflection yoke, 1a ... Deflection yoke body, 1c ... Notch groove, 2 ... Picture tube, 2b ... Funnel, 7 ... Adapter, 7c ... Claw, 7d ...
Projection, 7e ... Support, 7j ... Positioning notch, 7k
… Female thread, 8… Holding bolt, 8a… Male thread, 8b
... Central hole for injecting adhesive, 8c ... Tip, 8d ... Slit, 8e ... Umbrella, 8f ... Slit, 8h ... Hole, 9 ... Tip pad

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Tsukii 3300 Hayano Mobara-shi, Chiba Pref.

Claims (6)

(57) [Claims] An adapter attached to the outer periphery of a funnel surface of a picture tube is attached to a large diameter side of a deflection yoke bobbin, and the adapter is provided with three or more female threads substantially perpendicular to the funnel surface. A deflection yoke fixing structure for fixing the deflection yoke to the funnel surface of the picture tube by screwing a holding bolt having a tip reaching the funnel surface within the female screw portion of the above, and adjusting these holding bolts in the female screw portion. The deflection yoke fixing structure, wherein the holding bolt has a center hole for injecting an adhesive extending in a longitudinal direction at a center, and an umbrella portion divided by a slit at a tip end side and expanding in a radial direction. 2. The deflection yoke fixing structure according to claim 1, wherein the holding bolt has a lateral hole extending from the center hole to the male screw portion. 3. The holding bolt according to claim 1, wherein a tip pad made of an elastic material is provided at a tip end.
Or the deflection yoke fixing structure according to 2. 4. The holding bolt has a plurality of adhesive injection slits connected to the adhesive injection center hole, and the installation positions of these adhesive injection slits are different from the installation position of the slit of the umbrella portion. The deflection yoke fixing structure according to claim 1, wherein the positions are different from each other. 5. The deflection yoke fixing structure according to claim 1, wherein said adapter is provided with a positioning notch on a horizontal outer peripheral portion for determining a horizontal position when the deflection yoke is mounted. . 6. The deflection yoke fixing structure according to claim 1, wherein the adapter has a magnet piece for corner convergence and distortion correction attached to a corner portion.