JPH06215954A - Anode cap assembly for image receiving tube - Google Patents

Abstract

PURPOSE:To provide an anode cap assembly for facilitating the fixing of a contact preventive ring to the outer periphery of a high voltage lead wire. CONSTITUTION:In an anode cap assembly for image receiving tube comprising an anode cap 1 and a high voltage lead wire 11 having one end connected with the anode terminal of image receiving tube, the anode cap 1 is provided detachably and integrally with a contact preventive ring 9.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cathode ray tube anode cap assembly.

[0002]

2. Description of the Related Art A high voltage generated by a high voltage coil of a flyback transformer and rectified by a rectifying circuit is supplied to an anode terminal of a picture tube through an anode cap assembly (anode lead). This anode cap assembly is composed of an insulating and flame-retardant material such as silicon rubber, and a high voltage lead that penetrates the anode cap and has one end connected to the anode terminal of a picture tube and the other end connected to the rectifying circuit. And a line.

[0003]

When the flyback transformer and the picture tube are connected using the anode cap assembly, the high-voltage lead wire is separated from the surface of the picture tube or the like (grounded) by a distance that can maintain the pressure resistance. It is necessary. As a countermeasure against this, conventionally, a contact prevention ring is attached to the outer periphery of each high-voltage lead wire to maintain the above pressure-resistant distance. However, in this method, the contact prevention ring and the anode cap assembly are separate parts, and the material cost and the manufacturing cost increase accordingly, resulting in an increase in cost, and one contact prevention ring is used for the high voltage lead wire of the anode cap assembly. Since it has to be fitted on the outer periphery, there are drawbacks that the number of working steps increases, the working efficiency decreases, and the working cost increases significantly.

The present invention has been made in view of the above points, and an object thereof is to provide an anode cap assembly for a picture tube in which a contact prevention ring can be easily provided on the outer circumference of a high voltage lead wire.

[0005]

In order to solve the above problems, the present invention provides an anode cap assembly for a picture tube comprising an anode cap and a high voltage lead wire having one end connected to the anode terminal of the picture tube. It is characterized in that a contact prevention ring is provided separately in one body.

Further, the present invention is characterized in that the contact prevention ring is provided at the outer lead port of the lead wire introducing portion of the anode cap.

[0007]

[Function] After passing the high voltage lead wire through the anode cap, pull the contact prevention ring integrally formed on the anode cap to cut the tear portion, and slide only the contact prevention ring separated from the anode cap on the high voltage lead wire to make it suitable. Can be placed in position.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the anode cap assembly of the present invention.

The anode cap assembly comprises an anode cap 1 and a high voltage lead wire 11. Figure 1
Shows a state in which the high voltage lead wire 11 is passed through the anode cap 1 in the direction of arrow D to assemble the anode cap assembly.

The anode cap 1 is made of an insulative and flame-retardant material such as silicon rubber, and is composed of a bowl-shaped main body and a projecting lead wire introduction portion 2 formed on the head of the main body. The lead wire introducing portion 2 is provided with a through hole 4 for passing the high voltage lead wire 11. The through hole 4 is formed from an inner lead opening 4a provided inside the bowl-shaped body to an outer lead opening 4b provided on the outer surface. Is in communication with.

The high voltage lead wire 11 connects the rectifier circuit of the flyback transformer (FBT) and the picture tube (CRT), and the anode spring 6 for connecting to the anode button of the picture tube is attached to the outer periphery of the tip thereof. is doing. The anode spring 6 is fixed to the core wire of the high voltage lead wire 11 by soldering. The rear end of the high-voltage lead wire 11 enters the through hole 4 of the anode cap 1 in the direction of arrow D through the inner lead port 4a, is pulled out from the outer lead port 4b, and finally the anode spring 6 stops at the inner lead port 4a. It is supposed to do.

A contact prevention ring 9 is integrally formed so as to be connected to the outer lead port 4b of the lead wire introducing portion 2 of the anode cap 1. Outer lead port 4b and contact prevention ring 9
Are connected by a tearing portion 8 having a notch such as a thin wall (the embodiment shown) or a perforation. The tear portion 8 is easily torn by pulling the contact prevention ring 9 in the direction of arrow A, and as a result, the contact prevention ring 9 is separated from the anode cap 1.

A hole 10 is provided at the axial center of the tear portion 8 and the contact prevention ring 9, and the hole 10 is formed in the anode cap 1.
The high-voltage lead wire 11 can be passed through by communicating with the through hole 4. The boss portion of the tearing portion 8 around the hole 10 has a wide axial width as shown in the figure, so that the hole 10 and the high voltage lead wire 1
It is preferable to widen the contact with 1 and prevent the contact prevention ring 9 from falling. Although the outer peripheral surface of the contact prevention ring 9 may be circular (in the illustrated embodiment, a circle is shown) or polygonal, the distance from the center line to the outer peripheral surface is as shown in FIG.
As shown in, the high voltage lead wire 11 needs to be separated from the ground surface of the cathode ray tube, that is, the picture tube so as to have a size capable of maintaining the withstand voltage.

FIG. 3 is a perspective view showing a state in which the anode cap assembly of the present invention is attached to a picture tube.

The above anode cap assembly is assembled and attached to the picture tube as follows. (1) The rear end of the high-voltage lead wire 11 is inserted in the through hole 4 of the anode cap 1 in the direction of arrow D from the inner lead port 4a to the outer lead port 4b, and further the tearing portion 8 and the center hole 10 of the contact prevention ring 9 are formed. The anode spring 6 on the high-voltage lead wire 11 and the inner lead port 4
Stop at a. In this way, the assembly of the anode cap assembly is completed. (2) Next, when the contact prevention ring 9 is pulled in the direction of the arrow A, the tear portion 8 is cut and the contact prevention ring 9 is separated from the anode cap 1. Further, by sliding the contact prevention ring 9 on the high-voltage lead wire 11 and placing it at an appropriate position, the high-voltage lead wire 11 can maintain the pressure resistance at a certain distance from the surface of the picture tube. (3) The rear end of the high voltage lead wire 11 is connected to the rectifier circuit of the flyback transformer, the anode cap 1 is pressed against the outer surface of the picture tube, and the anode spring 6 at the front end of the high voltage lead wire 11 is pressed to the anode button of the picture tube. Connect to.
In this way, the state shown in FIG. 3 is obtained, and the high voltage (DC of about 30 KV) of the flyback transformer is applied to the high voltage lead wire 1.
1, through the anode spring 6 at its tip, it can be safely supplied to the picture tube.

FIG. 2 is an exploded cross-sectional view of another embodiment of the anode cap assembly of the present invention.

Since the embodiment of FIG. 2 is similar to the embodiment of FIG. 1, only the differences will be described. In FIG. 2, a recess 3 is formed inside the bowl-shaped main body. A through hole 4 for passing the high voltage lead wire 11 is formed in the lead wire introducing portion 2, and the through hole 4 has an inner lead port 4a communicating with the recess 3 and an outer lead port 4b on the outer surface. A conductive needle-shaped metal fitting 12 is fixed to the tip of the high-voltage lead wire 11 with, for example, solder, and is inserted into the through hole 4 of the anode cap 1 in the direction of arrow C. A connecting member 5 having an outer periphery bonded with an anode spring 6 for connecting to an anode button of a picture tube is elastically pushed in the recess 3 of the main body in the direction of arrow B. The connecting member 5 is made of conductive rubber. The structure and operation of the contact prevention ring 9 formed integrally with the anode cap 1 are exactly the same as those of the embodiment of FIG.

The anode cap assembly of FIG. 2 is assembled as follows. (1) The connecting member 5 is inserted into the recess 3 of the anode cap 1 in the direction of arrow B to be elastically embedded. (2) The high-voltage lead wire 11 is passed through the hole 10 of the contact prevention ring 9 in the direction of arrow C from the needle-like metal fitting 12 at the tip thereof,
Further, the through hole 4 of the anode cap 1 is passed through the outer lead port 4b thereof, and the inner lead port 4a is inserted into the conductive rubber connecting member 5 embedded in the main body of the anode cap 1 to pierce the anode cap assembly. Complete the assembly. (3) Next, the contact prevention ring 9 is pulled in the direction of the arrow A to separate the tear portion 8 from the anode cap 1. The contact prevention ring 9 is slid to a proper position on the high-voltage lead wire 11 so that the high-voltage lead wire 11 can be kept at a certain distance from the ground surface of the picture tube to maintain the pressure resistance.

Thus, the state shown in FIG. 3 is obtained,
The high voltage of the flyback transformer can be supplied to the anode button of the picture tube through the high voltage lead wire 11, the needle-shaped metal fitting 12 at the tip thereof, the conductive rubber connecting member 5, and the anode spring 6.

[0021]

As described above, according to the present invention, the contact prevention ring is detachably provided integrally with the anode cap, the high voltage lead wire is passed through the anode cap, and then the contact prevention ring is separated from the anode cap. With this configuration, the following excellent effects can be obtained. (1) Since the contact prevention ring and the anode cap assembly are integrally molded, the number of parts is reduced, and the material cost and the manufacturing cost are reduced. (2) Compared with the conventional case where the contact prevention rings made as separate parts were fitted one by one on the outer circumference of the high voltage lead wire of the anode cap assembly, the work man-hour was reduced,
Work efficiency is improved, and thus work cost is reduced.

[Brief description of drawings]

FIG. 1 is a front view of an anode cap assembly of the present invention.

FIG. 2 is an exploded cross-sectional view of another embodiment of the anode cap assembly of the present invention.

FIG. 3 is a perspective view showing a state in which the anode cap assembly of the present invention is attached to a picture tube.

[Explanation of symbols]

 1 Anode cap 9 Contact prevention ring 11 High voltage lead wire

Claims (2)

[Claims] 1. An anode cap assembly for a picture tube comprising an anode cap and a high-voltage lead wire whose one end is connected to an anode terminal of the picture tube, wherein a contact prevention ring is detachably provided integrally with the anode cap. Characteristic picture tube anode cap assembly. 2. The cathode cap anode cap assembly according to claim 1, wherein the contact prevention ring is provided at an outer lead port of a lead wire introducing portion of the anode cap.