JPS5843885B2 - flyback transformer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flyback transformer device for use in a television receiver.

Generally, in flyback transformer equipment, the high voltage lead wire is taken out from the high voltage coil as is, or a separate high voltage lead wire is connected through other connection means, but the high voltage lead wire does not have directionality. Since the flyback transformer is provided in the flyback transformer, there is a problem in that the discharge occurs in close proximity to other conductive parts that constitute the flyback transformer device.

The present invention proposes a flyback transformer device devised to solve these problems, and details thereof will be explained below with reference to embodiments shown in the drawings.

In FIG. 1, reference numeral 1 denotes an insulating case, which is made of a material such as polyethylene terecrate reinforced with glass fibers, for example.

2 shows a group of components of the flyback transformer inserted into the case, of which 3 is a ferrite core assembled in the shape of a mouth, 4 is a low voltage coil attached to the core via a bobbin, and 5 is a Furthermore, there is a high voltage coil mounted on top of the low voltage coil.

Reference numeral 6 denotes a terminal plate made of polynisder glass mat material, which is integrated with the core 3 via a screw punch 7.8 as a magnetic core assembly means.

9 is a metal terminal provided on the terminal board.

10 is also a terminal plate made of the same material as the terminal plate 6, and one end of an electrical component is connected to a metal terminal 11 provided on the terminal plate.

12 and 13 are a capacitor and a selenium rectifier that constitute a voltage doubler rectifier.

14 is a lead wire for extracting focus voltage;
5 is its cap.

Note that 16 is a bushing made of rubber material.

17 is a cylindrical protection wall provided according to the present invention.

When the component group is inserted into the insulating case 1, the recesses 18 and 19 formed in the terminal plate 6 are slid down and fitted into the guide rods 20 and 21 provided in the case 1. It is easy to insert.

Further, the long notch 22 provided in the case 1 may be used to insert the lead wire connecting the transformer side and the rectifier side, but it also helps to ensure that the resin flows smoothly when the insulating resin is applied in a liquid state. It was established to make this possible.

On the other hand, the convex portions 23, 24 are for realizing fitting with the cylindrical protection wall 17, and in particular, the convex portions 25, 26, 27 are small through holes 17' provided in the flange of the socket 1γ. It mates with the socket, making the socket installation stable.

As shown in FIG. 2, the parts housed in the case are covered with resin 28, and only the terminal plate 6, the cylindrical protective wall 17, etc. are exposed.

The resin is added in liquid form and then heat cured, so each part is embedded within the solid.

According to the experimental results of the present inventors, epoxy resin was suitable as the resin.

Through such solidification, the flyback transformer can be completed with the components sealed. In this case, the cylindrical protection wall 17 is connected to the high voltage lead wire 42 and the high voltage lead wire 42 within the cylindrical protection wall 17. The high-voltage IJ-wire 39 connected to the core 3 is kept away from the terminal 9, and also the screws 7 and 8, which are electrically at the same potential as the core 3, are kept away from these terminals 9. This means that the possibility of a discharge accident occurring between the screws and the conductive parts such as the screws 7 and 8 is eliminated.

In addition, as another embodiment of the flybank transformer device, it may be further placed in a metal case 29 and completely sealed.

At this time, rubber bushings 30 are attached to all the metal terminals 9, and ring-shaped rubber bushings 31 are attached to the cylindrical protective wall 17.

Therefore, each insertion hole 32, 33 provided in the metal case 29
, 34 and 35 come into direct contact with the inclusions made of the rubber material.

The details are shown in FIG.

The rubber bushing 30 fitted into the metal terminal 9 has an inclined groove 36 at its bottom to facilitate attachment to the terminal 9.

The wall of the insertion hole of the metal case 29 is cut and raised slightly downward so as to fit into the rubber bushing 30.

Referring again to FIG. 2, 37 is a lead holder fitted into the protective wall 1γ.

Reference numeral 38 denotes a conductive tip portion of the high voltage lead wire 39, and the conductive tip portion 38 may be formed by connecting something separate from the high voltage lead wire 39, or may be a conductor of the high voltage lead wire itself. .

40 is a cap body provided at the other end of the high voltage lead wire.

41 is a protective wall cover made of synthetic resin, which covers the cylindrical protective wall 17.
is screwed into the

That is, as shown in FIG. 5, the threaded groove provided on the lower inner surface of the protective wall cover 41 and the threaded groove provided on the lower outer surface of the protective wall 17 are screwed together.

Incidentally, during this screwing and fixing, the lower part of the protective wall cover 41 presses the rubber bushing 31, so that the gap between the metal case and the protective wall is completely sealed.

At the same time, since the upper part of the protective wall cover 41 presses the lead holder 37, the adhesiveness between the protective wall and the lead holder is improved, and the possibility of occurrence of electric discharge can be prevented.

A flyback transformer arrangement double sealed by an outer metal case 29 is shown in FIG.

The advantage of having a double structure with the case is that the flyback transformer device can be installed in any location within the television receiver without having to be placed in close proximity to other electrical components, and that it has good dust-proof and moisture-proof properties. It will be done.

Note that if the inner surface of the metal case is made black, the internal heat will be easily transferred to the outside, which will help prevent the flyback transformer from getting too hot.

As explained above, the flyback transformer device of the present invention has a structure in which the high-voltage lead wire does not come close to other conductive parts that constitute the flyback transformer, especially the magnetic core assembly means that is normally held at ground potential. Therefore, there is an effect that no discharge occurs between the conductive portion and the reliability is improved.

Furthermore, as shown in the illustrated embodiment, a similar effect can be obtained in a place where the outer periphery of the flyback transformer device is sealed with a metal case. It can also be expensive.

Furthermore, in the present invention, the conductive portion at the tip of the high voltage lead wire and the high voltage coil are connected on the axis of the high voltage lead wire hanging inside the cylindrical protective wall, so that the connection is easy and can be performed without applying excessive force. It is also possible to realize a stable connection state in which no voltage is applied to the high voltage lead wire.

[Brief explanation of the drawing]

The drawings all relate to a flyback transformer device embodying the present invention; FIG. 1 is a perspective view of its component parts, FIG. 2 is an exploded perspective view, FIG. 3 is an external view, and FIGS. FIG. 5 is a sectional view for explaining a part thereof in detail. 1... Insulation case, 2... Flyback transformer component group, 3... Core, 4...
...Low voltage coil, 5...High voltage coil, 9...
...Terminal, 11...Cylindrical protection wall, 39.4
2...High voltage lead wire.

Claims (1)

[Claims] 1. A magnetic core assembled in a shape, a low-voltage coil and a high-voltage coil coaxially arranged on one leg of the magnetic core via a bobbin, and an insulating case containing the outer high-voltage coil;
An insulating material made of thermosetting resin filled in the insulating case, a high-voltage lead wire electrically connected to the high-voltage coil, and a high-voltage bow part for leading out the high-voltage lead wire from the insulating case. and a conductive magnetic core assembling means that forms a mouth-shaped assembly of the magnetic core and is exposed in the same direction as the high voltage lead wire, wherein the high voltage lead-out portion is provided with a conductive magnetic core assembly means that is parallel to the high voltage coil axis. A cylindrical protective wall that protrudes beyond the magnetic core assembly means is provided, and a connection between a conductive portion at the tip of the high-voltage lead wire and the high-voltage coil is established on the axis of the high-voltage lead wire that hangs down inside the cylindrical protective wall. A flyback transformer characterized by the following.