JPH076713A - Cathode-ray tube and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent the fouling on the appearance of a deflection yoke and a funnel, and ensure the positioning-fixing condition of an adjusting tool. CONSTITUTION:A wedge-like adjusting tool 15, inserted between a deflection yoke and a funnel 2 to position the deflection yoke 5 on a cathode-ray tube bulb 4 to be fixed by adhesive (b), is composed of a rubber-like elastic body. The outlets 20 and 21 of the adhesive (b) are formed on two acute-angled tip tapered surfaces 16 and 17 abutting on the deflection yoke 5 and the funnel 2, the inlet 22 of the adhesive (b) communicated with the outlets 20 and 21 to be opened is formed on a rear end surface 18 crossing the tip tapered surfaces 16 and 17, and a recessed groove 23 extended from the outlet 20 of the adhesive (b) to spread the adhesive (b) overflowing from the outlet 20 is formed on the tip tapered surface 16 abutting on the deflection yoke 5.

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 and a method for manufacturing the same, and more particularly, to a color cathode ray tube used in a television receiver or the like, a structure and method for positioning and assembling a deflection yoke on the cathode ray tube valve. Regarding

[0002]

2. Description of the Related Art Generally, a color cathode ray tube used in a television receiver has a structure shown in FIG. Specifically, it is composed of a face panel (1) made of lead glass, a cathode ray tube bulb (4) in which a funnel (2) and a neck (3) are joined and integrated by frit glass or the like, and is formed on the inner surface of the face panel (1). An RGB fluorescent film is formed, and an electron gun is positioned and enclosed in the neck (3). On the other hand, the deflection yoke (5) is externally fitted and assembled to the funnel (2).

This deflecting yoke (5) is used to convert an electron beam emitted from an electron gun into RGB on the inner surface of the face panel (1).
Since the fluorescent film is scanned while being irradiated through the shadow mask, the electron beam is deflected while reaching the face panel (1). Therefore, in order to accurately irradiate the RGB fluorescent film of the face panel (1) with the electron beam, the deflection yoke (5) for deflecting the electron beam must be attached to the funnel (2) with high positioning accuracy. .

Therefore, the deflection yoke (5) is assembled to the funnel (2) while using the adjusting tool (6) shown in FIG. As shown in the figure, the adjusting tool (6) is made of a substantially wedge-shaped rubber-like elastic body, and has two tip tapered surfaces (7) and (8) forming an acute angle, and the tip tapered surface (7). Tongue piece (10) extending from the rear end face (9) that intersects with (8)
Have integrally. On the other hand, the deflection yoke (5) is a trumpet-shaped tubular body whose diameter is expanded from one end to the other end, and the tightening fitting (11) is provided at the one end where the diameter is reduced.

When the deflection yoke (5) is assembled to the cathode ray tube valve (4), the mounting position and angle of the cathode ray tube valve (4) with respect to the tube axis are important. The mounting position is shown in FIG. 5 (a). It is finally determined by the tightening fitting (11), and its mounting angle is determined by adjusting with the adjusting tool (6).

That is, as shown in FIGS. 5 (a) and 5 (b), the deflection yoke (5) is externally fitted to the cathode ray tube valve (4), the mounting position with respect to the tube axis is determined, and the deflection yoke is then determined. Fix it by tightening the tightening metal fitting (11) on the neck side of (5). On the other hand, the above-mentioned plural [for example, three] adjusting tools (6) are inserted between the funnel side of the deflection yoke (5) and the cathode ray tube valve (4) to adjust the pushing amount of each adjusting tool (6). Cathode ray tube according to (4)
The mounting angle of the tube to the tube axis is adjusted. At this time, each adjusting tool (6) is arranged at an appropriate position along the circumferential direction of the opening of the deflection yoke (5) and adheres to the tip tapered surface (7) (8) of each adjusting tool (6). After applying the material (a) in advance, it is inserted between the funnel (2) and the deflection yoke (5), and the tip tapered surfaces (7) (8), the funnel (2) and the deflection yoke (5) are The adhesive material (a) interposed therebetween spreads, and then the deflection yoke (5) is fixed to the funnel (2) by curing the adhesive material (a).

[0007]

By the way, in the mounting structure of the deflection yoke (5) to the cathode ray tube valve (4) by the adjusting tool (6) described above, the deflection yoke (5) is mounted on the cathode ray tube valve (4). When determining the mounting angle with respect to the tube axis, it is very difficult to determine the position in the circumferential direction of the deflection yoke (5) of the adjusting tool (6), so the tip tapered surface (7) (8) The adjustment tool (6) coated with the adhesive material (a) must be inserted and removed many times, and the final position must be determined while adjusting the position of the adjustment tool (6). The current situation.

As described above, when the adjusting tool (6) is repeatedly put in and out between the deflection yoke (5) and the funnel (2), the adhesive material (a) is applied to the deflection yoke (5) and the funnel (2). ) Remains and stains on the appearance, which lowers the product quality and reduces the amount of adhesive (a) applied to the adjuster (6).
There is a problem in that the positioning and fixing state of the adjusting tool (6) becomes uncertain, and the positional deviation easily occurs, and the adjusting accuracy deteriorates.

Therefore, the present invention has been proposed in view of the above problems, and an object of the present invention is to prevent the outer appearances of the deflection yoke and the funnel from being contaminated and to ensure the positioning and fixing state of the adjusting tool. (EN) Provided is a cathode ray tube which can be made into a flat tube and a manufacturing method thereof.

[0010]

As a technical means for achieving the above object, a cathode ray tube according to the present invention comprises a cathode ray tube bulb in which a face panel, a funnel and a neck are integrally joined together, and an electron housed in the neck. Between the deflection yoke and the funnel mounting surface in a cathode ray tube that has a deflection yoke that deflects the electron beam emitted from the gun toward the fluorescent film formed on the inner surface of the face panel and is externally fitted to the funnel of the cathode ray tube bulb. The wedge-shaped adjuster, which is inserted into the tube and positions the deflection yoke with respect to the cathode ray tube valve and is fixed with an adhesive, is made of a rubber-like elastic material and is bonded to the two tapered tip surfaces that make contact with the deflection yoke and the funnel. A discharge port for the material is formed, and an injection port for the adhesive that opens in communication with the discharge port is formed on the rear end face that intersects the two tapered surfaces. The features.

It is preferable that the adjusting tool has a concave groove on the tip tapered surface thereof so as to extend from the ejection port of the adhesive material and spreads the adhesive material overflowing from the ejection port.

Further, the method of the present invention comprises a cathode ray tube bulb in which a face panel, a funnel and a neck are joined and integrated, and an electron beam emitted from an electron gun housed in the neck toward a fluorescent film formed on the inner surface of the face panel. In a method of manufacturing a cathode ray tube in which a deflection yoke for deflecting is attached to the funnel of the cathode ray tube valve and assembled, the deflection yoke is positioned with respect to the cathode ray tube valve by inserting between the deflection yoke and the mounting surface of the funnel. The wedge-shaped adjuster fixed with an adhesive is made of a rubber-like elastic body, and the ejection port of the adhesive is formed on the two acute-angled tapered end surfaces that come into contact with the deflection yoke and the funnel, and intersects with the two tapered end surfaces. An adhesive injection port that communicates with the ejection port and opens is formed on the rear end face, and the attitude adjustment of the deflection yoke is completed and the adjustment tool is positioned. After, characterized by injecting adhesive from the inlet of the adhesive material.

[0013]

In the cathode ray tube according to the present invention, the discharge port for the adhesive is formed on the two tapered surfaces forming the acute angle, and the injection port for the adhesive communicating with the discharge port is formed on the rear end surface intersecting with the two tapered surfaces. When the deflection yoke is fitted onto the cathode ray tube bulb by assembling it by using the adjustment tool that has been formed, the adjustment tool is inserted between the deflection yoke and the funnel without an adhesive, and the deflection yoke is properly mounted. After the setting position of the adjustment tool is finally determined after setting, if the adhesive material is injected from the injection port on the rear end surface of the adjustment tool, the adhesive material overflows from the discharge port on the tapered surface that communicates with this. Then, it spreads between the tapered surface of the tip and the deflection yoke and the funnel and is fixed by adhesion.

As described above, after the attitude adjustment of the deflection yoke is completed and the adjustment tool is positioned, an adhesive is injected between the deflection yoke and the funnel to bond the deflection yoke to the funnel with the adjustment tool. , It is not necessary to repeatedly insert and remove the adjusting tool to position it.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the cathode ray tube according to the present invention is shown in FIG.
(A), (b) and FIG. 2 will be described. The same parts as those in FIGS. 3 to 5 (a) and 5 (b) are designated by the same reference numerals, and a duplicate description will be omitted.

According to the present invention, as shown in FIGS. 1 (a) and 1 (b), a deflection yoke (5) mounted on a cathode ray tube valve (4) is provided.
This is a structure of an adjusting tool (15) for positioning and fixing the posture of the cathode ray tube valve (4).

This adjusting tool (15) is inserted between the deflection yoke (5) and the mounting surface of the funnel (2) as shown in FIG. It consists of a wedge-shaped rubber-like elastic body that positions the deflection yoke (5) and fixes it with the adhesive (b), and has two acute-angled tapered surfaces (1) that contact the deflection yoke (5) and the funnel (2).
6) (17), a rear end surface (18) intersecting the two front end tapered surfaces (16) (17), and a tongue piece (19) extending from the rear end surface (18).

The feature of the present invention is that the discharge ports (20) (2) of the adhesive (b) are formed on the tip tapered surfaces (16) (17) as shown in FIG.
1) is formed, and the injection port (22) of the adhesive (b) communicating with the discharge ports (20) (21) is formed in the rear end face (18). In addition, one tip tapered surface (16) that abuts the deflection yoke (5) is engraved so as to extend from the ejection port (20) of the adhesive (b), and the adhesive that overflows from the ejection port (20). It has a concave groove (23) for expanding the material (b). Although the groove (23) is formed in a cross shape with the discharge port (20) as the center, the present invention is not limited to this and may have another shape.

According to the present invention, when the deflection yoke (5) is attached to the cathode ray tube bulb (4), as shown in FIG.
As shown in (b), attach the deflection yoke (5) to the funnel (2).
Then, after the fitting position of the deflection yoke (5) on the neck side of the deflection yoke (5) is tightened, the fitting position is fixed to the tube axis. On the other hand, a plurality (for example, three) of the adjusting tools (15) described above are inserted between the funnel side of the deflection yoke (5) and the cathode ray tube valve (4) to adjust the pushing amount of each adjusting tool (15). Accordingly, the mounting angle of the cathode ray tube valve (4) with respect to the tube axis is adjusted. At this time, each adjusting tool (15) is arranged at an appropriate position along the circumferential direction of the opening of the deflection yoke (5).

Here, as a method of manufacturing a cathode ray tube, when arranging the adjusting tool (15) along the circumferential direction of the opening of the deflection yoke (5), the adjusting tool (15) is repeated several times as in the conventional case. It is performed by moving it in and out between the deflection yoke (5) and the funnel (2).
It is to be done without applying adhesive (b) to 5). With this configuration, the adjustment tool (15) can be easily taken in and out, and the adhesive does not remain on the deflection yoke (5) and the funnel (2).

In this way, when a plurality of adjusting tools (15) are arranged at proper positions along the circumferential direction of the opening of the deflection yoke (5) and finally determined, the adjusting tools (15) are Supply adhesive (b). That is, the rear end face (1
The adhesive (b) is injected from the injection port (22) in the 8), and the discharge port (20) (21) that communicates with the injection port (22) and opens at the tip tapered surface (16) (17) Let it overflow. The adhesive material (b) overflowing from the discharge port (21) of the one tip tapered surface (17) spreads between the tip tapered surface (17) and the attachment surface of the funnel (2). On the other hand, the adhesive (b) overflowing from the discharge port (20) of the other tip tapered surface (16)
Is guided by the groove (23) and its tip tapered surface (1
Spread between 6) and deflection yoke (5). After that, the deflection yoke (5) is set in the funnel (2) by hardening the adhesive material (b).
Fixed to. Therefore, since each adjusting tool (15) is in the final proper position, it does not come in and out between the deflection yoke (5) and the funnel (2) after the adhesive material (b) is supplied.

[0022]

According to the present invention, the ejection port for the adhesive is formed on the two tapered end surfaces forming an acute angle, and the adhesive injection port communicating with the ejection port is formed on the rear end surface intersecting with the two tapered end surfaces. By using the adjusting tool that has been formed, the mounting position of the adjusting tool with respect to the cathode ray tube valve is finally determined, and then by injecting the adhesive material from the adhesive injection port, the adjusting tool is firmly fixed with the adhesive material. Since the adhesive material does not remain in an undesired place, it is possible to provide a good product in appearance, and the positioning state of the deflection yoke becomes even more reliable. Image quality is improved.

[Brief description of drawings]

1A and 1B are views for explaining an embodiment of a cathode ray tube and a method for manufacturing the same according to the present invention, where FIG. 1A is a partial front view showing a main part of the cathode ray tube, and FIG. 1B is a side view of FIG. Figure

FIG. 2 is a perspective view showing an adjusting tool used in the cathode ray tube of FIG.

FIG. 3 is a front view showing a specific example of a cathode ray tube.

FIG. 4 is a perspective view showing an adjusting tool used in a conventional cathode ray tube.

5A and 5B are views for explaining a conventional cathode ray tube using the adjusting tool of FIG. 4, where FIG. 5A is a partial front view showing a main part of the cathode ray tube, and FIG. 5B is a side view of FIG.

[Explanation of symbols]

 1 Face panel 2 Funnel 3 Neck 4 Cathode ray tube valve 5 Deflection yoke 15 Adjuster 16, 17 Tip tapered surface 18 Rear end surface 20, 21 Discharge port 22 Inlet 23 Recessed groove b Adhesive

Claims (3)

[Claims] 1. A deflection yoke comprising a cathode ray tube bulb in which a face panel, a funnel and a neck are integrally joined together, and which deflects an electron beam emitted from an electron gun housed in the neck toward a fluorescent film formed on the inner surface of the face panel. In a cathode ray tube that is fitted onto the funnel of the cathode ray tube valve and assembled, the wedge shape is inserted between the deflection yoke and the attachment surface of the funnel to position the deflection yoke with respect to the cathode ray tube valve and fix it with an adhesive material. The adjustment tool is made of a rubber-like elastic body, and the ejection port of the adhesive is formed on the two acute-angled tip taper surfaces contacting the deflection yoke and the funnel, and the ejection port is formed on the rear end surface that intersects with these two tip taper surfaces. A cathode ray tube, characterized in that an injection port for an adhesive material is formed so as to communicate with and open. 2. The adjusting tool has a concave groove formed on a tip end tapered surface thereof so as to extend from a discharge port of the adhesive, and has a groove for spreading the adhesive overflowing from the discharge port. Cathode ray tube. 3. A deflection yoke, which comprises a cathode ray tube bulb in which a face panel, a funnel and a neck are integrally joined, and which deflects an electron beam emitted from an electron gun housed in the neck toward a fluorescent film formed on the inner surface of the face panel. In a method of manufacturing a cathode ray tube to be fitted onto a funnel of a cathode ray tube valve and assembled, the deflection yoke is inserted between the deflection yoke and a mounting surface of the funnel, and the deflection yoke is positioned with respect to the cathode ray tube valve and fixed with an adhesive material. The wedge-shaped adjuster is made of a rubber-like elastic body, and the ejection port of the adhesive is formed on two acute-angled taper surfaces that come into contact with the deflection yoke and the funnel, and the ejection end is formed on the rear-end surface that intersects with these two taper surfaces. After forming an injection port of an adhesive material that communicates with the outlet and opens, and after adjusting the attitude of the deflection yoke and positioning the adjustment tool, A method of manufacturing a cathode ray tube, which comprises injecting an adhesive material from an inlet.