JPH0560245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention particularly relates to a small flyback transformer that requires multiple outputs and multiple lead lines.

Conventional structure and its problems In recent years, flyback transformers, like other electronic components, have been required to be made smaller. Therefore, it is necessary to narrow the spacing between the terminals of the low-voltage bobbin of the flyback transformer. There was a problem with the insulation of each wire when wiring.

A conventional small flyback transformer low pressure bobbin will be described below with reference to the drawings.

1 and 2 show the structure of a conventional small flyback harness. In FIGS. 1 and 2, 1 is an iron core, 2 is a low-voltage bobbin, 3 is a terminal implanted in the collar of this low-voltage bobbin 2, 4 is a low-voltage coil wound around the low-voltage bobbin 2, and 5 is a low-voltage bobbin 2 The high voltage lead wire of the high voltage coil incorporated inside the
6 and 7 are wiring lead wires.

In FIG. 2, when the intervals between the terminals 3 of the low voltage bobbin 2 are narrowed, each terminal 3 is attached on the same plane, and the wiring lead wires 6, 7
When wiring and soldering, the distance between the cross section of each wiring lead wire 6, 7 and the terminal 3 is short, so the wiring lead wires 6, 7 and the terminal 3 may be shorted, In addition, since the cross section of the wiring leads 6 and 7 exists on the surface of the collar on which the terminal 3 is planted, there is a drawback that the wiring leads 6 and 7 may be shot together during soldering. Ta.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention aims to maintain insulation between each wiring lead wire of a low-voltage coil and a terminal in a small flyback transformer, thereby improving workability.

Structure of the Invention In order to achieve this object, a small flyback transformer of the present invention has a low voltage bobbin in which a plurality of terminals for low voltage coil wiring are implanted, and is in contact with the end surface on the coil winding side on each terminal implantation surface, and An insulating protrusion is provided between each terminal, and the wiring lead wire of the low-voltage coil is hooked onto the insulating protrusion, and the wiring cross wire is positioned on the side surface of the coil winding side using the insulating protrusion. By incorporating a high voltage coil and an iron core into this low voltage bobbin, insulation between each wiring lead wire and terminal and wiring lead wires can be ensured.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, 8 is an iron core, 9 is a low-voltage bobbin, 10 is a plurality of terminals implanted in the collar of this low-voltage bobbin 9, 11 is a low-voltage coil wound around the low-voltage bobbin 9, and 12 1 is a high-voltage lead wire drawn out from a high-voltage coil incorporated in the low-voltage bobbin 9; 13 and 14 are wiring lead wires; The terminal 10 is in contact with the end surface on the winding side.
This is an insulating protrusion provided in between.

With such a configuration, as shown in FIG. 4, the wiring leads 13 and 14 are hooked onto the insulating protrusion 15 and wired to be connected to the terminal 10 of the low voltage bobbin 9. Due to this insulating protrusion 15, a cross portion is formed in the wiring lead wires 13 and 14 on the coil winding side end face of the low voltage bobbin 9, and the cross portion is not located on the terminal planting surface. The terminals 10 that are not connected are wired at a constant interval. Therefore, even when the wiring leads 13 and 14 wound around the terminal 10 are soldered, the necessary parts can be reliably soldered, and there is no possibility that the solder will adhere to unnecessary parts and cause shorts. This will also be prevented.

Effects of the Invention As described above, according to the small flyback transformer of the present invention, the wiring lead wires wired to each terminal are located between the terminals, and the insulating protrusion in contact with the end face of the low voltage bobbin on the coil winding side allows This allows a sufficient distance from the terminal, and the cross section of the wiring lead wire is not located on the terminal planting surface, but is located on the end surface on the coil winding side, so even if soldering is performed, each wiring lead wire and Because there is sufficient distance between the terminals,
The effect is that insulation can be reliably performed without causing shot defects.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional small flyback transformer, Fig. 2 is an enlarged perspective view of main parts of a conventional small flyback transformer, and Fig. 3 is a perspective view showing an embodiment of the flyback transformer of the present invention. , FIG. 4 shows an enlarged perspective view of the main parts of the flyback transformer. 8... Iron core, 9... Low voltage bobbin, 10... Terminal, 11... Low voltage coil, 12... High voltage lead wire, 13, 14... Wiring lead wire, 15... Insulating protrusion.

Claims (1)

[Claims] 1. An insulating protrusion is provided between each terminal on the terminal-embedded surface of a low-voltage bobbin in which multiple low-voltage coil wiring terminals are embedded, so that it touches the end surface on the coil winding side, and the wire is hooked onto this insulating protrusion. A small flyback transformer in which a wiring lead wire for a low-voltage coil is wired, the cross section of this wiring is positioned on the end face on the coil winding side with an insulating protrusion, and a high-voltage coil and iron core are incorporated into this low-voltage bobbin.