JP2000340278A - High voltage cable device for installing cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable high voltage cable device for installing a cathode-ray tube at a low cost. SOLUTION: A metal terminal 5 is formed by bending a metal plate such that a crosswise cross section is approximately an inverted U shape. A top bent part 6 is a holding part for a high voltage lead wire 2. Both bottom end parts 7, 7 are connecting ends of a cathode-ray tube 3. An extension part 31 is extended in a slanted forward and downward direction from the top bent part 6. A cable core holding part 32 is formed at a tip of the extension part 31 to crimp and hold a cable core 10 at a tip of the high voltage lead wire 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage cable device for mounting a CRT for guiding a high voltage to a CRT such as a television receiver and a personal computer display.

[0002]

2. Description of the Related Art When an electron beam is emitted from an electron gun at the rear of a cathode ray tube to a fluorescent screen inside the front surface of the cathode ray tube, a high voltage of over 30 KV is applied to the cathode ray tube to accelerate electrons. This high voltage is generated by the flyback transformer and supplied to the anode terminal of the cathode ray tube through the high voltage cable device for attaching the cathode ray tube.

FIGS. 6 and 7 show a conventional high voltage cable device for mounting a cathode ray tube. This device includes a high-voltage lead wire 2 whose base end is connected to a flyback transformer 1 and a cathode-ray tube 3 which holds a distal end portion of the high-voltage lead wire 2.
Cap 4 and high-voltage lead 2
And a terminal fitting 25 which is attached to the tip of the anode cap 4 and held at the center of the inside of the anode cap 4.

The terminal fitting 25 is, as shown in FIG.
A structure in which a steel plate is bent in a substantially inverted U-shape in cross section, and a top bent portion 26 serves as a holding portion for the high-voltage lead wire 2, and cathode ray tube connection ends 28, 28 are formed at both lower ends 27, 27. It has become. At the tip of the high-voltage lead wire 2, the core wire 10 that has been exposed by stripping off the coating 9 is folded back,
The high-voltage lead wire 2 extends rearward along the upper surface side of the covering portion 9 and is fixed by solder 11 so as to be electrically connected to the inner surface side of the top bent portion 26. The high-voltage lead wire 2 is held in the top bent portion 26 by pressing the top bent portion 26. However, in order to restrict the movement in the axial direction, the top bent portion 26 is formed.
A bending claw 12 is provided at the rear end of the nose. This bent claw 1
By moving the high-voltage lead 2 into the covering 9 of the high-voltage lead 2, the axial movement of the high-voltage lead 2 is restricted.

The high-voltage cable apparatus for mounting a cathode ray tube is assembled as shown in FIG. 7, and the anode cap 4 is adsorbed and supported on the back surface of the cathode ray tube 3 as shown by arrows in FIG.
Is inserted into the terminal insertion portion 14 of the cathode ray tube 3 and electrically connected to the anode terminal portion on the inner surface side of the cathode ray tube 3, so that a high voltage can be supplied from the flyback transformer 1 to the cathode ray tube 3. Can be. In addition,
In FIG. 6, 15 is an electron gun, 16 is a cathode, 17 is a heater, 18 is a deflection coil, 19 is a phosphor screen,
20 is an aluminum film.

[0006]

In the above conventional example, since the connection between the terminal fitting 25 and the core wire 10 of the high-voltage lead wire 2 is performed by using the solder 11, the following problems arise.

First, the bending position of the core wire 10 of the high-voltage lead wire 2 needs to be positioned at a predetermined angular position in the circumferential direction in relation to the connection portion of the top bent portion 26 of the terminal fitting 25. Therefore, there is a problem that the positioning work and the soldering work required from the above are required, and the cost is increased due to the complicated work.

[0008] Second, there are cases where the solder 11 does not sufficiently adhere to the core wire 10 and the terminal fittings 25 and soldering occurs after soldering. Quality assurance cannot be obtained for electrical connections. In addition, there is a problem that a solder quality inspection is required.

Third, since the soldering process is involved, complicated processes such as surface treatment, baking, and plating for the terminal fitting 25 are indispensable, resulting in an increase in cost.

An object of the present invention is to provide a high-voltage cable apparatus for mounting a cathode ray tube, which solves the above-mentioned problems of the conventional example.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention holds a high-voltage lead wire connected to a flyback transformer at a base end, and a distal end portion of the high-voltage lead wire and is attached to a cathode ray tube. An anode cap,
In a high-voltage cable apparatus for mounting a cathode ray tube, comprising a terminal fitting attached to a tip end of a high-voltage lead wire and held at a central portion inside an anode cap, the terminal fitting folds a metal plate into a substantially inverted U-shaped cross section. It is formed by bending, the top bent part becomes the holding part of the high voltage lead wire, the both lower ends become the connection ends of the cathode ray tube, and the extension part protrudes from the top bent part downward diagonally forward. It is characterized in that a core wire holding portion for extending and holding a core wire at the tip of a high-voltage lead wire by crimping is formed at the tip of the extension portion.

In the above invention, it is preferable that a locking claw bent downward is formed at the top bent portion of the terminal fitting, and the locking claw is bitten into a covering portion of the high-voltage lead wire.

Further, in the above invention, it is preferable that the terminal fitting is made of stainless steel.

[0014]

Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the high-voltage cable apparatus for mounting a CRT according to the present embodiment holds a high-voltage lead wire 2 whose base end is connected to a flyback transformer 1 and a distal end portion of the high-voltage lead wire 2. The anode cap 4 is attached to the cathode ray tube 3 and a terminal fitting 5 attached to the tip 2a of the high-voltage lead wire 2 and held at the center of the inside of the anode cap 4 (see FIG. 6).

The anode cap 4 is made of rubber, and has a trumpet-shaped main body 4a and a lead wire introduction pipe 4b formed integrally therewith. A concave portion 4c for holding a terminal fitting is formed in the center of the inside of the anode cap 4 and communicates with the inner hole of the pipe portion 4b, and the terminal fitting 5 is held in the concave portion 4c.

As shown in FIGS. 2 and 3, the terminal fitting 5 is formed by bending a metal plate made of stainless steel into a substantially inverted U-shaped cross section, as shown in FIGS. The top bent portion 6 serves as a holding portion for the high-voltage lead wire 2, and both lower ends 7, 7 serve as CRT connection ends.
An extension portion 31 is extended so as to project obliquely forward and downward from the top bent portion 6. Is formed. Further, a locking claw 33 bent downward is formed at a position near the rear side of the top bent portion 6 so that the locking claw 33 can bite into the covering portion 9 of the high-voltage lead wire 2. ing.

The top bent portion 6 is formed to have an arc having a circumferential angle of about 240 ° so as to be suitable for holding the high-voltage lead wire 2 having a circular cross section. An elephant-shaped extension 31 extends from the center of the front side of the bent portion 6 to the lower front diagonally. The distal end of the extending portion 31 is a core wire holding portion 32 formed by bending right and left triangular pieces 32a and 32b projecting left and right, respectively, downward. The inclined side of one right triangle piece 32a is on the rear side,
The slanted side of the other right triangular piece 32b is on the front side, and when the core wire 10 is held by caulking, both slanted sides are in contact with each other.

The lower ends 7, 7 are bent outwardly and then bent downward, and approximately inverted T-shaped connecting projections 7a, 7a project downward from the center of the lower side. These connecting projections 7a are connected to the terminal insertion portion 14 of the cathode ray tube 3.
(See FIG. 6).

The operation of attaching the terminal fitting 5 to the tip of the high-voltage lead wire 2 is performed as follows. That is, as shown by an arrow in FIG. 4A, the high-voltage lead wire 2 having the core wire 10 exposed at the tip is pushed into the top bent portion 26 by pressing the covering portion 9 of the high-voltage lead wire 2 in the pressing step. The high-voltage lead wire 2 is held by the top bent portion 26, and the locking claw 33 is bitten into the covering portion 9, so that the axial movement of the high-voltage lead wire 2 is transferred to the terminal fitting 5. To be bound by. At the same time, the core wire 10
After the right and left triangular pieces 32a, 32b are positioned in the concave space of the core wire holding portion 32,
As shown in (b), the core wire 10 is held and fixed to the core wire holding portion 32 by caulking inward. Next, as shown in FIG. 5, the nose-like extending portion 31 is bent substantially at a right angle so that the terminal fitting 5 can be easily mounted in the recess 4 c of the anode cap 4.

The terminal fitting 5 to which the high-voltage lead wire 2 is connected as described above is incorporated in the anode cap 4 as shown in FIG. 1, and a high-voltage cable device for mounting a CRT is constructed as shown in FIG. .

[0022]

According to the present invention, since the core wire of the high-voltage lead wire is held by caulking in the core wire holding portion formed integrally with the terminal fitting, the soldering process as in the conventional example is performed. As a result, the work of connecting the high-voltage lead wire to the terminal fitting is simplified, the reliability of the electrical connection between the high-voltage lead wire and the terminal fitting is improved, and further, the surface treatment associated with the soldering process is performed. Steps such as baking can be omitted, and a highly reliable high-voltage cable device for mounting a cathode ray tube can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a terminal fitting.

3 (a) is a front view, FIG. 3 (b) is a side view, and FIG. 3 (c) is a plan view.

FIGS. 4A and 4B show an operation for connecting a terminal fitting and a high-voltage lead wire, wherein FIG. 4A is a perspective view and FIG.

FIG. 5 is a perspective view showing an operation of connecting a terminal fitting and a high-voltage lead wire.

FIG. 6 is a principle diagram of a high-voltage cable device for mounting a CRT.

FIG. 7 is a sectional view showing a conventional example.

FIG. 8 is a perspective view showing a main part of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 flyback transformer 2 high-voltage lead wire 3 cathode ray tube 4 anode cap 5 terminal fitting 6 top bent portion 7 lower end portion 9 covering portion 10 core wire 31 extension portion 32 core wire holding portion 33 locking claw

Claims (3)

[Claims] 1. A high-voltage lead wire having a base end connected to a flyback transformer, an anode cap holding a distal end portion of the high-voltage lead wire and attached to a cathode ray tube, and an anode cap attached to a distal end portion of the high-voltage lead wire. In a high-voltage cable device for mounting a CRT with a terminal fitting held at the center of the inside of the cap, the terminal fitting is formed by bending a metal plate into a substantially inverted U-shaped cross section,
The top bent portion becomes the holding portion of the high-voltage lead wire, and both lower ends become the connection ends of the cathode ray tube, and the extension portion is extended from the top bent portion so as to project obliquely forward and downward. A high-voltage cable device for mounting a cathode ray tube, wherein a core wire holding portion for holding a core wire of a high-voltage lead wire tip by caulking is formed at a tip of an extension portion. 2. The terminal according to claim 1, wherein a locking claw bent downward is formed at a bent portion at the top of the terminal fitting, and the locking claw is bitten into a covering portion of the high-voltage lead wire. High-voltage cable device for mounting CRTs. 3. The high-voltage cable device for mounting a CRT according to claim 1, wherein the terminal fitting is made of stainless steel.