JPH0454366B2 - - 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 distance between each terminal of the low-voltage bobbin of a flyback transformer, and There was a problem with the insulation of each wire when wiring.

A conventional small flyback transformer will be explained below with reference to the drawings.

1 and 2 show the structure of a conventional small flyback transformer. In FIGS. 1 and 2, 1 is a magnetic 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 the above-mentioned High-voltage lead wires 6 and 7 drawn out from the high-voltage coil incorporated in the low-voltage bobbin 2 are wiring lead wires. When the spacing between the terminals 3 of the low voltage bobbin 2 is narrowed in FIG. When soldering is performed, the wiring lead wires 6 and 7 are also soldered, resulting in a short circuit between the wiring lead wires 6 and 7.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to maintain insulation between each wiring lead wire of a low-voltage coil in a small flyback transformer and to improve workability.

Structure of the Invention In order to achieve this object, the small flyback transformer of the present invention has a low-voltage bobbin with a flange in which a plurality of terminals are embedded, and a part of the low-voltage bobbin in which each terminal is embedded, protrudes outward perpendicularly to the terminals. A wiring groove with a depth exceeding the thickness of the wiring lead wire is formed between the wiring protrusion and the wiring lead wire of the low voltage coil is drawn out from the wiring groove to the outside of the collar. The high-voltage coil and magnetic core are built into the low-voltage bobbin, and the high-voltage coil and the magnetic core are hooked onto the terminal for wiring. With this configuration, the insulation between the respective drawer lead wires is ensured.

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

In Figures 3 and 4, 8 is EI type or EE type.
It is a type of magnetic core. 9 is a low-voltage bobbin made of synthetic resin, 10 is a terminal implanted in the flanges at both ends of this low-voltage bobbin 9, 11 is a low-voltage coil wound around this low-voltage bobbin 9, and 12 is a terminal 10 of the low-voltage bobbin 9 implanted therein. a wiring protrusion protruding outward perpendicular to the terminal 10 provided on the collar; 13 is a wiring groove;
5 is a wiring lead wire, and 16 is a high voltage lead wire drawn out from a high voltage coil housed in the low voltage bobbin 9. In FIG. 4, the wiring groove 13 has a depth exceeding at least the thickness of the wiring lead wires 14 and 15, and the wiring lead wires 14 and 15 pass through the wiring groove 13 from the low voltage coil 11 to the wiring protrusion. 12 and connected to the terminal 10. This allows wiring to be done while maintaining a sufficient distance between the wiring lead wires 14 and 15 and the unrelated terminals 10.

Effects of the Invention As described above, according to the small flyback transformer of the present invention, even when the wiring lead wires wired to each terminal are soldered to the terminals, each wiring lead wire is lower than the bottom of the terminal to be soldered. It is located at a low position, does not need to be soldered, and can ensure insulation between each wiring lead wire, and the distance between the terminal and wiring lead wire is maintained by the wiring protrusion, ensuring reliable insulation. Effects can be obtained.

In addition, by providing a wiring protrusion that protrudes outward perpendicular to the terminal in the part where the terminal is planted, it becomes easy to automate the series of processes for drawing out and wiring the winding, improving productivity. .

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional flyback transformer, FIG. 2 is an enlarged perspective view of the main parts of the same flyback transformer, FIG. 3 is a perspective view showing an embodiment of the flyback transformer of the present invention, and FIG. The figure shows an enlarged perspective view of the main parts of the flyback transformer. 8...Magnetic core, 9...Low voltage bobbin, 10...Terminal, 11...Low voltage coil, 12...Wiring protrusion,
13... Wiring groove, 14, 15... Wiring lead wire, 16... High voltage lead wire.

Claims (1)

[Claims] 1. A low-voltage bobbin with a flange in which multiple terminals are embedded, a wiring protrusion protruding outward perpendicular to the terminal in the part where each terminal is embedded, and the thickness of the wiring lead wire between the wiring protrusions. A wiring groove with a depth exceeding A small built-in flyback transformer.