JPS5821355Y2 - flyback transformer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flybank transformer used in a television receiver.

Referring to FIG. 1, a composite structure consisting of a plurality of flanges 3, a first groove 5 formed between the flanges 3 and around which a high-voltage coil 4 is wound, and a second groove 7 to which a rectifier diode 6 is attached, as well. In the conventional flyback transformer 1 equipped with a high-voltage coil bobbin 2 made of resin, the rectifier diode 6 is installed by connecting the leads of the rectifier diode 6 as shown in FIG. The metal terminals 8, 8 having recesses 9, 9 for receiving the terminals 5a, 5a are mounted on the cylindrical portion of the second groove 7 in parts IQ and 10.
The lead terminals 6a of the rectifier diode 6 are press-fitted into the holes of the metal terminals 8, 8.

6a was drawn on the bridging metal terminal part and soldered together with the high voltage coil lead wire.

However, in FIG. 1, a pulse voltage is applied to one lead terminal 6a of the rectifier diode 6, and a DC voltage is generated to the other lead terminal 6b.
A pulse voltage is applied to the upper coil winding 4a, and a DC voltage is applied to the lower coil winding 4b.The area around the rectifier diode 6 is in a special electrical state. The coil windings 4a and 4b are susceptible to insulation deterioration if the mutual gap is not maintained appropriately, but the metal terminal 8 is compared to the conventional flyback transformer that uses a metal terminal. Since it is located in the second groove 7 with a high target and a wide width, the gap cannot be maintained appropriately, and therefore there is a drawback that insulation deterioration is likely to occur.

The present invention proposes a flyback transformer devised to eliminate these conventional drawbacks.

That is, the present invention has notches 12.12, as shown in the embodiments shown in FIG. , 6b are temporarily held in a pinching manner, and the lead wire 1 of the high voltage coil is connected to the lead terminal 6a s6b.
3. A pair of synthetic resin wires that fix the lead terminals 6a and 6b in such a way that when the wires 3.14 are wrapped and soldered (see Fig. 4), they are slightly deformed by heat and the lead terminals bite into the deformed portions. A holding column 11.11 is provided in the second groove 7.

Figure 5 shows the installation order and how it is done.
1 into the taper-shaped notch 12 from directly above, and push it in without worrying that the bifurcated arm 15.15 will open as shown in the opening in the figure.

In this state, as shown in FIG. 4, the lead wires 13 and 14 of the high voltage coil windings 4a and 4b are connected to the lead terminals 6. Wrap around the ends of a and 6b and solder.

At this time, the heat applied reaches the holding column 11, and as shown in FIG. After returning, the lead terminal 6a of the rectifier diode 6 is bitten into the deformed portion and fixed.

As mentioned above, according to the proposed flybank transformer, it is possible to eliminate the metal terminal used for mounting the rectifier diode, which is conventionally used. Therefore, the fixing and connecting part of the lead terminal of the rectifier diode is the second part of the high voltage coil bobbin. A first groove located low within the groove and adjacent to the second groove.
The distance between the high-voltage coil winding wound in the concave groove is increased, and the insulation between the two is ensured.

In addition, the holding column that holds the lead terminal of the rectifier diode under pressure is such that when the lead wire of the high-voltage coil is soldered to the lead terminal, the lead terminal is slightly deformed due to heat and the lead terminal bites into the deformed part. Since the terminals are fixed, the rectifier diode can be held even more firmly, contributing to improved reliability of the flybank transformer.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a flyback transformer, and FIG. 2 is a perspective view showing the main parts of a conventional flybank transformer. FIG. 3 is a perspective view of a main part of a high-voltage coil bobbin used in the flyback transformer of the present invention, and FIG. 4 is a perspective view of a rectifier diode being attached to it. FIG. 5 is an explanatory diagram of the present invention. 1... Flyback transformer, 2... High voltage coil bobbin, 3... Tsuba, 4
... High voltage coil, 5... First groove, 6... Rectifier diode, 6a, 6b... Lead terminal of rectifier diode, 7... Second groove, 11... Holding column, 12...
Notch, 13.14... High voltage coil lead wire.

Claims (1)

[Scope of utility model registration request] A flyback transformer is provided with a high-voltage coil bobbin made of synthetic resin having a plurality of flanges, a first groove formed between the flanges and around which a high-voltage coil is wound, and a second groove to which a rectifier diode is attached. By pushing the lead terminal of the rectifier diode into the notch, the lead terminal is held under pressure, and when the lead wire of the high voltage coil is soldered to the lead terminal, it is slightly deformed due to heat. A flyback transformer characterized in that a pair of holding posts made of synthetic resin are provided in the second groove to fix the lead terminals so that the lead terminals bite into the deformed portions thereof.