JPH0737493A - Electron gun electrode structure and asembly method thereof - Google Patents

Abstract

PURPOSE:To facilitate an assembly work, and to improve assembly accuracy so as to stabilize quantity by eliminating the necessity for connector welding for providing mutual conductivity between both electrodes. CONSTITUTION:An electron gun electrode structure has plural electrodes fixed by bead glasses. A connector 1a for providing mutual conductivity between both electrodes is embedded inside of electrode fixing bead glass 6, and on the other hand, an erected part 4b, in the bead glass 6, is provided on the electrode 4 side and a connecting tongue part 4a to be connected to the connector 1a is provided at the tip of this erected part 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode assembly for an electron gun used in a cathode ray tube and a method for assembling the electrode assembly.

[0002]

2. Description of the Related Art FIG. 5 is a plan view showing an electrode assembly of a conventional electron gun. In the figure, 2 is a G2 electrode, 3 is a G3 electrode, 4 is a G4 electrode, 5 is a G5 electrode, and each is supported and fixed by a bead glass 6 at a predetermined interval, and these constitute an electrode assembly. .

1a is a connector fixed to each of the G2 electrode 2 and the G4 electrode 4 at a welding point 7 for electrical connection, and 1b is also for establishing electrical connection between the G3 electrode 3 and the G5 electrode 5. It is a connector fixed to each electrode at a welding point 7.

FIG. 6 is an enlarged side view showing a welded portion between the G2 electrode 2, the G4 electrode 4 and the connector 1a, and FIG. 7 is a front view thereof. Connector-attaching tongues 2a and 4a are provided near the upper outer sides of the G2 electrode 2 and the G4 electrode 4, respectively, and the connector 1a is welded to these tongues 2a and 4a. A bead rising portion 4b is provided at the center of the upper part of the G4 electrode 4, and this portion is embedded in the bead glass 6 and is supported and fixed. The tongue portion and the protruding portion are provided on any of the G2 electrode 2, the G3 electrode 3, and the G4 electrode 5.

The welding procedure is that the bead glass 6 is placed at predetermined intervals.
Of the electrodes fixed to, the connector 1a is the G4 electrode 4 first.
Of the G2 electrode 2 and then to the tongue 2a of the G2 electrode 2. Then, the connector 1b is welded to the tongue of the G5 electrode 5, and further to the tongue of the G3 electrode 3.

[0006]

By the way, conventionally, when welding the connectors 1a and 1b to predetermined positions, shaping and positioning are performed by using tweezers. There is a problem in that the electrodes are deformed or move due to the variation in the technique, so that a predetermined electrode interval cannot be obtained and the assembly accuracy is deteriorated.

FIG. 8 is a diagram for explaining deterioration of assembly accuracy. After the connector 1a is welded to the G4 electrode 4 at the welding point 7, it is necessary to apply a force to the connector 1a in the direction of arrow 9 toward the G2 electrode 2 side, for example, when aligning the G2 electrode 2 at a predetermined position. , G4 electrode 4 is deformed to the position of 40. As a result, the distance between the G3 electrode 3 and the G4 electrode 4 becomes as narrow as the originally desired distance of 8 to 80.

The present invention has been made in order to solve the above-mentioned problems, and by eliminating the need for connector welding for establishing electrical continuity between electrodes, deterioration of assembly accuracy is prevented and the quality of cathode ray tubes is improved. It is intended to stabilize the assembly and to perform the assembly work efficiently.

[0009]

In the method of assembling an electron gun electrode assembly according to the present invention, a connector connected to a plurality of electrodes fixed by a bead glass is formed in or on the bead glass for fixing an electrode. On the other hand, one electrode side is provided with a protrusion part to the bead glass and a connection tongue part to the connector, and the tongue part and the connector are simultaneously contacted and connected in the process of melting the bead glass and standing up the electrode. It is the one.

The electron gun electrode assembly according to the present invention is
The connector to be connected to the electrode is embedded in the bead glass for fixing the electrode.On the other hand, the electrode glass is provided with a protrusion to the bead glass and a tongue to connect to the connector at the tip of this protrusion. is there.

Alternatively, the above-mentioned connector is formed on the electrode side surface of a bead glass for fixing an electrode, and on one side of the electrode, there is a protruding portion to the bead glass and a connecting tongue portion to the connector which contacts the connector at the protruding position. And are provided.

[0012]

In the electron gun electrode assembly and the method of assembling the electron gun electrode according to the present invention, instead of welding the electrodes to the connector, the electrodes are connected to the connector formed in the bead glass or on the surface by contact. It is possible to improve the assembly accuracy of the electron gun and stabilize the quality without applying any external force.

[0013]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1, 2, and 3 are a plan view, a front view, and an enlarged front view of a main part of an electrode assembly according to an embodiment of the present invention, in which 1a is a connector pre-embedded in a bead glass 6 and 4a. Is a connection tongue to the connector provided at a position corresponding to the connector 1a on the protruding portion 4b provided at the center of the upper part of the G4 electrode 4. Here, the G4 electrode 4 is electrically connected via the connector 1a embedded in the bead glass 6, the bead glass protruding portion 4b, and the tongue portion 4a.

The above-mentioned standing-up work is not a special method, but the conventional method of welding and fixing the electrode to the bead glass is used. That is, the bead glass 6 in which the connector 1a is embedded is heated by a burner. Since only the electrode leading-in side is heated, the embedded connector is hardly deformed. The bead glass, which is heated by a burner and whose surface is melted, is pressed and fixed at predetermined intervals to the electrodes fixed by a jig. At this time, the connector connecting tongue 4a provided on the electrode protrusion 4b contacts the connector 1a.
When this is cooled, the G4 electrode 4 is mechanically supported and fixed to the bead glass 6 and, at the same time, electrically connected to the connector 1a.

Although only the G4 electrode 4 has been described above, work is similarly performed on the G2 electrode 2, the G3 electrode 3 and the G5 electrode 5. At this time, of course, although not shown, the G2 electrode 2 has a connector tongue portion at a position corresponding to the connector 1a, and the G3 electrode 3 and the G5 electrode 5 each have a connector embedded in the bead glass 6. 1b
The connection tongue to the connector corresponding to is provided on the upper part of each recess.

Example 2. FIG. 4 shows another embodiment of the present invention. In the first embodiment, the electrical connection between the electrodes is achieved by the connector embedded in the bead glass, but in this embodiment, the connector 1 formed of the conductive film on the lower surface of the bead glass 6 is used.
a is formed, a connecting tongue portion 4a to the connector is provided at the position of the G4 electrode 4 corresponding to the connector 1a made of the conductive film, and the tongue portion 4a is made conductive when the electrode protruding portion 4b is erected on the bead glass 6. By contacting the connector 1a made of a film, the electrodes are fixed and the connector is connected at the same time. Although only the G4 electrode 4 is described in this figure, the other electrodes have the same configuration and the same working procedure.

[0017]

As described above, according to the present invention, the connector is formed inside or on the surface of the bead glass, and the electrical connection between the electrodes is secured by the contact between the connector tongue and the connector provided on the electrode. Therefore, unlike the conventional case, no force is applied in the electrode spacing direction in the assembly process, and there is no concern that the assembly accuracy will deteriorate, so that a product with stable quality can be obtained.

Further, since welding work is not required and the electrode can be fixed to the bead glass and connected to the connector at the same time, the workability can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an electrode structure according to a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged front view showing a connection tongue portion for connection to a connector and a connection portion of the connector according to the first embodiment.

FIG. 4 is a front view showing a main part of an electrode assembly according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a conventional electrode structure.

FIG. 6 is a side view showing a part of FIG. 5 in an enlarged manner.

FIG. 7 is a front view of FIG.

FIG. 8 is a diagram for explaining an example of assembly accuracy deterioration that occurs during connector welding.

[Explanation of symbols]

 1a connector 1b connector 2 G2 electrode 3 G3 electrode 4 G4 electrode 4a connection to connector tongue 4b recess 5 G5 electrode 6 bead glass

Claims (3)

[Claims] 1. A method of assembling an electron gun electrode assembly, wherein a plurality of electrodes are integrally assembled by a bead glass, wherein when the bead glass is melted to stand up the electrodes,
A method for assembling an electron gun electrode assembly, characterized in that a connector provided in or on a surface of a bead glass for fixing electrodes is brought into contact with a connection tongue provided on an electrode side for connection. 2. An electron gun electrode assembly having a plurality of electrodes fixed by bead glass, wherein a connector connected to the electrodes is embedded in a bead glass for electrode fixation, and the bead glass is provided on the electrode side. An electron gun electrode assembly characterized in that a protruding portion to be embedded and a tongue portion for connecting to a connector are provided at a tip of the protruding portion. 3. An electron gun electrode assembly having a plurality of electrodes fixed by bead glass, wherein a connector to be connected to the electrodes is formed on the electrode side surface of the electrode fixing bead glass, and the electrode side has the above-mentioned structure. An electron gun electrode assembly comprising: a lead-in portion to be embedded in the bead glass; and a connection tongue portion to the connector that comes into contact with the connector at the lead-in position.