JP2686389B2 - Method of mounting cathode ray tube device and deflection yoke - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube device and a method of mounting a deflection yoke, and more particularly to a device having a mechanism for reducing an alternating electric field emitted from the deflection yoke.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram of a conventional cathode ray tube device. In the figure, the funnel portion 1 is composed of a neck portion 1a, a cone portion 1b, and a funnel body portion 1c having a high-voltage anode button 1d, and is frit-sealed to a panel portion 2. The electron gun 3 is sealed in the neck portion 1a. Explosion-proof bands 4 for assuring explosion-proof characteristics are wound around the side surfaces of the panel portion 2, and hooking portions 4a for suspending a cathode ray tube on a casing (not shown) are integrally provided at four corners. There is. Further, a silicon resin film 5 for insulation is formed around the high voltage anode button 1d provided on the funnel body 1c. Further, a conductive film 6 for adding capacitance to the cathode ray tube is formed on the outer surface of the funnel body 1c. The conductive film 6 is usually formed by applying graphite. The funnel portion 1 and the panel portion 2 are also called a glass bulb (tube bulb).

As shown in FIG. 9, a deflection yoke 7 for deflecting an electron beam is attached to the cathode ray tube constructed as described above at a position between the cone portion 1b and the neck portion 1a. . The deflection yoke 7 is shown in FIG.
As shown in 0, the horizontal deflection coil 7a, the vertical deflection coil 7b, and the deflection yoke main body portion 7c are formed.

Next, the operation will be described. Neck 1a
When an electron beam is emitted from the electron gun 3 sealed in
The emitted electron beam is deflected by a predetermined amount in the horizontal and vertical directions by the horizontal deflection coil 7a and the vertical deflection coil 7b of the deflection yoke 7, and is scanned on the fluorescent film formed on the inner surface of the panel portion 2 to obtain a desired image. Is projected. The deflection amplitude at this time is inversely proportional to the square root of the voltage applied to the anode button 1d.

By the way, in the cathode ray tube configured as described above, when the deflection yoke deflects the electron beam, no measure is taken to shield the alternating electric field radially generated around the deflection yoke, and the human body The alternating electric field, which is harmful to, penetrates the funnel and panel of the cathode ray tube,
There is a problem that the light is emitted in front of the cathode ray tube.

Therefore, in order to solve such a problem, a conductive film is additionally formed from the cone portion 1b of the funnel to the neck portion 1a so as to cover the front surface of the opening portion of the deflection yoke, and the additionally formed conductive film is formed. It has been proposed to provide a means for interposing an insulating layer between the surface of the film and the deflection yoke.

A detailed description will be given with reference to FIGS.
8 and 9, the same reference numerals indicate the same or corresponding portions, and 8 is a conductive film provided by coating graphite from the cone portion 1b to the neck portion 1a of the funnel 1 in order to shield the alternating electric field. It is formed so as to cover the opening of the deflection yoke continuously with the conductive film 6 for adding capacitance to the cathode ray tube. An insulating sheet 9 is provided to electrically insulate the conductive film 8 and the coil portion of the deflection yoke. The insulating sheet has a funnel shape as shown in FIG. 6, and is made of, for example, silicone rubber.

[0008] FIG. 7 is a diagram showing a state where the deflection yoke 7 and fitted in a cathode ray tube equipped with a insulating sheet 9 of FIG. Note that a wedge or the like is inserted between the deflection yoke 7 and the insulating sheet 8 as a positioning jig for attaching the deflection yoke 7 or as a fixing jig.

[0009]

The conventional cathode ray tube device and deflection yoke mounting method are configured as described above, and as an insulating layer for insulating the conductive film for shielding the alternating electric field from the deflection yoke. For example, when a sheet cover or the like made of silicon rubber is used and simply interposed, the adhesion of the insulating layer to the funnel portion is insufficient, and the wedge used when the deflection yoke is fitted in a later step. However, there are problems that the seat fixing cover is turned up or cracked due to such a positioning fixing jig, and the insulation is hindered or the workability when mounting the deflection yoke is deteriorated.

The present invention has been made to solve the above problems, and has an insulating layer between the conductive film formed on the surface of the funnel and the deflection yoke for the function of shielding the alternating electric field. It is an object of the present invention to provide a cathode ray tube device in which the insulation and the workability at the time of attaching the deflection yoke are not deteriorated even with the interposition of.

[0011]

A cathode ray tube device according to the present invention is an insulation for electrically insulating a deflection yoke from a conductive film formed in a funnel portion so as to cover a front surface of an opening of a deflection yoke. The sheet is adhesively fixed to a predetermined region of the conductive film on which the positioning / fixing jig is mounted when the deflection yoke is fitted by using a double-sided adhesive tape.

Further, a mark is provided on the insulating sheet to indicate a position where the double-sided adhesive tape is to be adhesively fixed.

Further, in the cathode ray tube device according to the present invention, the insulating sheet is mounted on the conductive film formed in the region where the deflection yoke is fitted, and the positioning / fixing jig when the deflection yoke is fitted. Is fixed by using a single-sided tape in a predetermined region of the conductive film on which is provided.

Further, the deflection yoke mounting method according to the present invention uses a jig having an inner surface shape capable of closely adhering to the rear surface of the tube and having a mark indicating a position where the adhesive tape is attached, and the adhesive tape is mounted on the rear surface of the tube. It is the one that is pasted.

[0015]

According to the present invention, the conductive film and the insulating sheet are adhered and fixed using an adhesive tape in a predetermined region of the conductive film where the positioning / fixing jig is provided when the deflection yoke is fitted. Adhesion is improved in the region, and in the subsequent step, it is possible to prevent problems such as turning over of the insulating sheet and the occurrence of sparks due to cracks.

Further, by providing the insulating sheet with a mark indicating a position where the double-sided adhesive tape is adhesively fixed, alignment can be easily performed.

Further, by mounting the adhesive tape using a jig for displaying the mounting position, the accuracy and workability of the mounting position of the tape are improved.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cathode ray tube device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a main part of a cathode ray tube device according to an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 5 to 7 indicate the same or corresponding parts, and 10a is an insulating film from a conductive film 6. A double-sided adhesive tape provided between the sheet 9 and the sheet 9 is affixed to a region where a wedge, which is a positioning / fixing jig, is provided when a deflection yoke is fitted in a later step.

Next, a method of attaching the insulating sheet 9 to the funnel 1 will be described with reference to FIG. As shown in FIG. 1 , the tape 10a (also having sufficient adhesive force on both sides) is formed on the cone portion 1b of the funnel 1 at a position corresponding to the position where the wedge is attached in the next step, that is, the step of mounting the deflection yoke 7. Double-sided adhesive tape) is attached, and then the insulating sheet 9 is attached.

At this time, in order to show the position where the tape 10a of the cone portion 1b of the funnel 1 is attached, as shown in FIG. 2, a positioning jig having a recess 21 at the position where the tape 10a is attached when fitted. The use of 20 improves the accuracy and workability of the tape 10a attachment position, and since the funnel has a slightly quadrangular pyramid shape, it can be applied to the insulating sheet 9 at a corresponding position as shown in FIG. By attaching the marking 11, the insulating sheet 9 and the tape 1
0a can be easily aligned, and the insulating sheet can be reliably attached to the cathode ray tube.

As described above, according to this embodiment, the double-sided tape 10 is preliminarily set at the position where the wedge is mounted when the deflection yoke is fitted.
Since a is attached and the insulating sheet 9 is adhesively fixed to improve the adhesion with the funnel 1, the insulating sheet 9 is turned over, twisted, or cracked when hammering in a later step. It becomes harder to get tired, and improvement in insulation can be expected. Also, positioning jig 2
By sticking the double-sided tape 10a using 0, the accuracy of the sticking position of the tape 10a and the workability can be improved. Further, marking 11 on the insulating sheet 9
By attaching, the insulating sheet 9 can be surely attached to the cathode ray tube.

Next, another embodiment of the present invention will be described. In this embodiment, as shown in FIG. 4, after the insulating sheet 9 is first attached to the cone portion 1b of the funnel 1, the insulating sheet 9 extends over the cone portion 1b of the funnel 1 in the same manner as in the first embodiment. The insulating sheet 9 is attached to the cone portion 1 of the funnel 1 by using the adhesive tape 10b (which may have an adhesive force only on one side) at a position where it will be mounted.
It may be attached to b, and the same effect as that of the above-mentioned embodiment is obtained.

[0023]

As described above, according to the present invention, since the insulating sheet is attached to the cone portion of the funnel with an adhesive force, a wedge or the like, which is a jig for positioning the deflection yoke, is attached in the subsequent step. Even when driving, the insulating sheet is not turned over or twisted, and the deflection yoke can be easily attached using wedges, so that the insulating property can be improved.

Furthermore, by attaching a mark to the insulating sheet, it is easy to align with the double-sided adhesive tape that has already been attached, and the cover can be reliably and easily adhered to the cathode ray tube. .

Further, when the double-sided adhesive tape is attached to the cone portion, by using the positioning jig, it is possible to improve the attachment position accuracy of the adhesive tape and the attachment workability.

[Brief description of the drawings]

FIG. 1 is a configuration diagram for explaining a main part of a cathode ray tube device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a positioning jig used when a double-sided adhesive tape of a cathode ray tube device according to an embodiment of the present invention is attached to a conductive film.

FIG. 3 is a view for explaining the shape of an insulating sheet of a cathode ray tube device according to an embodiment of the present invention.

FIG. 4 is a configuration diagram for explaining a main part of a cathode ray tube device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram showing a state in which an insulating sheet is attached to a cathode ray tube in a conventional cathode ray tube device equipped with a means for reducing an alternating electric field.

FIG. 6 is a view showing an insulating sheet mounted on a cathode ray tube in a conventional cathode ray tube device provided with a means for reducing an alternating electric field.

FIG. 7 is a configuration diagram showing a state in which a deflection yoke is fitted to a cathode ray tube through an insulating sheet in a conventional cathode ray tube device equipped with a means for reducing an alternating electric field.

FIG. 8 is a view showing only a cathode ray tube of a conventional cathode ray tube device.

FIG. 9 is a configuration diagram showing a state in which a deflection yoke is fitted in a cathode ray tube of a conventional cathode ray tube device.

FIG. 10 is a configuration diagram of a deflection yoke.

[Explanation of symbols]

 1 Funnel Part 1a Neck Part 1b Cone Part 1c Funnel Main Part 1d Anode Button 2 Panel Part 3 Electron Gun 4 Explosion-proof Band 4a Hooking Part 5 Silicone Resin 6 Conductive Film 7 Deflection Yoke 7a Horizontal Deflection Coil 7b Vertical Deflection Coil 7c Deflection Yoke Body Part 8 Conductive film for electric field shield 9 Insulating sheet 10a Double-sided adhesive tape 10b Adhesive tape 11 Marking 20 Positioning jig 21 Recess

Claims (4)

(57) [Claims] 1. A tube sphere comprising a funnel portion in which an electron gun is sealed, a face panel having a phosphor screen film on a surface facing the electron gun, and fitted in a predetermined region of the tube sphere. A deflection yoke for deflecting an electron beam emitted from the electron gun, a conductive film formed in a region of the funnel portion where the deflection yoke is fitted, and a gap between the conductive film and the deflection yoke. A cathode ray tube device having an insulating sheet interposed between the insulating sheet and the insulating sheet,
A cathode ray tube device, characterized in that it is adhesively fixed to a predetermined region of the conductive film provided with a fixing jig by using a double-sided adhesive tape. 2. The cathode ray tube device according to claim 1, wherein the insulating sheet has a mark indicating a position where the double-sided adhesive tape is adhesively fixed. 3. A tube body including a funnel portion having an electron gun sealed therein, a face panel having a phosphor screen film on a surface facing the electron gun, and fitted in a predetermined region of the tube body. A deflection yoke for deflecting an electron beam emitted from the electron gun, a conductive film formed in a region of the funnel portion where the deflection yoke is fitted, and a gap between the conductive film and the deflection yoke. In a cathode ray tube device having an insulating sheet interposed between the deflecting yoke and the deflection yoke, the insulating sheet is fitted and disposed on a conductive film formed in a region where the deflecting yoke is fitted. A cathode ray tube device characterized in that it is adhered and fixed with an adhesive tape in a predetermined region of the conductive film on which the positioning / fixing jig is provided. 4. A method for mounting a deflection yoke on a conductive film on the back surface of a tube body via an insulating sheet, wherein a mark having an inner surface shape capable of adhering to the back surface of the tube body and showing a position for attaching a double-sided adhesive tape is provided. Using a jig that has the jig, attach the jig to the back surface of the tube and attach a double-sided adhesive tape to the position indicated by the mark, remove the jig from the tube, and remove the insulating sheet with the double-sided adhesive tape. A method for mounting a deflection yoke, characterized in that the deflection yoke is attached and fixed to the conductive film on the back surface of the tube.