JPS5934974Y2 - flyback transformer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a flyback transformer in which the high voltage winding has a split winding structure.

In recent years, split winding methods have been used for FBT high voltage windings in order to reduce the distributed capacitance of the coil portion and reduce leakage inductance between the coil and the primary winding.

The structure of an FBT using this split winding method is as shown in Figure 1, in which the primary winding 2 is wound on the primary bobbin 1, and each groove of the high voltage side bobbin 3, which has many ribs, is wound. A high-voltage winding 4 is wound, combined with a primary winding, and an insulating material 5 is filled between the primary and high-voltage sides and around the high-voltage winding.

Further, 6 is an outer cover of the coil portion, 7 is a high-voltage lead wire, 8 is a magnetic core, 9 is a terminal plate, and 10 is a tightening screw.

By the way, in the split winding FBT, the primary bobbin 1
, since the terminal board 9 is used, there is a drawback that the material cost of the FBT increases.

The present invention has been made to solve the above-mentioned conventional drawbacks.

The present invention is characterized in that a cylindrical part for storing the primary winding is provided inside the high-voltage side bobbin, the primary side bobbin is removed, and a pin terminal is buried in the end of the bobbin, thereby eliminating the terminal plate. be.

The present invention will be explained in detail below according to embodiments shown in the drawings.

FIG. 2 shows an embodiment of the bobbin according to the present invention.
FIG. 3 shows an example of an FBT using the bobbin.

In FIG. 3, it is a 111d bobbin, 12 is a cylindrical portion for storing the primary winding, and 13 is a pin terminal for connecting the FBT lead wire.

Also.

Reference numeral 14 indicates a fastening fitting, and the same reference numerals are used for other parts that are the same as in FIG.

By the way, among the coil parts of the FBT shown in FIG. 3, the primary winding 2 is formed in advance as a single coil and is attached to the primary winding storage cylinder part 12.

Further, the high voltage winding 4 is wound on the outside of the bobbin 11 in a manner similar to the conventional method.

As described above, according to the present invention, it is possible to eliminate the primary bobbin 1 and the terminal board 9 while maintaining the same workability and reliability as before, which reduces the cost of FBT (measurable and saves resources). However, it is very effective.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an example of a flyback transformer in which a conventional high-voltage winding is wound in segments, Fig. 2 is a perspective view showing an embodiment of a bobbin used in the flyback transformer according to the present invention, and Fig. 3 2 is a sectional view showing a flyback transformer according to an embodiment of the present invention using the bobbin shown in FIG. 2. FIG. 11... Bobbin, 12... Cylindrical portion for storing primary winding, 13... Pin terminal.

Claims (1)

[Scope of utility model registration request] In a flyback transformer in which a divided bobbin is used to divide the high voltage winding, there is a
A flyback transformer characterized in that a cylindrical part for storing the next winding is provided, and a pin terminal for a low voltage electrode is embedded in the end of the bobbin.