JPS582016Y2 - flyback transformer - Google Patents

Description

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

In the conventional example shown in FIG. 1, a cylindrical first bobbin 1 (most of the right side is omitted) is wound with a secondary coil 2, and one end of this first bobbin 1 has a plurality of metal terminal 3
Terminal holding parts 4, which are embedded at predetermined intervals, not only connect the lead wire of the secondary coil 2 to the metal terminal 3, but also partially wind the coil 2 of the first bobbin 1. The lead wire of the secondary coil 7, which is wound around the second bobbin 5 with a plurality of cylindrical flanges 6, which is fitted into the attached portion and which is integrally fixed with the first bobbin 1, is also connected to the metal terminal 3. It is connected to a predetermined terminal 3a.

FIG. 1 shows the lead wire 7a of the secondary coil 7 wound around the terminal 3a.

This lead wire 7a is then fixed to the terminal 3a by soldering, but it is in a state where it straddles a relatively long distance between the second bobbin 5 and the terminal 3a.

FIG. 2 shows a collar 6a at the end of the second bobbin 5, to which a terminal 8 is attached by suitable means and wound in a recess formed between the collars. It serves as a relay when leading out the winding start portion (that is, the lead wire) of the secondary coil 7 to the terminal 3a.

By the way, the first and second bobbins 1 and 5 combined as shown in FIG. 1 are usually molded with a magnetic core inserted into the hollow part of the first bobbin 1. At that time, when injection molding the mold resin with the whole fixed in the mold, the lead wire 7. There is a risk that a may be severed.

Furthermore, even when resin is applied by a method other than injection molding, there is no risk of wire breakage.

In order to eliminate these drawbacks of conventional flyback transformers, the present invention proposes a flyback transformer having a structure in which the wire from the relay terminal of the second bobbin to the terminal of the first bobbin can be deleted. .

In the present invention shown in FIG. 3 and below, the shape of the relay terminal fixed to the hole 9 is T-shaped as shown in FIG. 5 or 6. , the insertion part 10a of this T-shaped terminal 10 is attached to the hole 9 for attaching the collar 6a.
Press fit into the secondary coil lead wire 7 and wrap it around the part 10b.
a (the winding start part of the secondary coil) is soldered several times with a few fists, so that the protruding part 10C comes into contact with the terminal 3a for the lead wire of the secondary coil 7 among the metal terminals of the first bobbin 1. It has become.

Therefore, unlike other similar terminals 3, the terminal 3a is provided so that both ends thereof are exposed from the terminal holding portion 4.

In the T-shaped terminal 10 for relay, in FIG.
In the illustrated embodiment, the protrusion 10C is formed by cutting and bending.

The winding part 10b has a narrow part as shown in the figure, and the lead wire 7a of the secondary coil is connected to this narrow part.
is wrapped around.

The protrusion 10C of the relay T-shaped terminal 10 and the terminal 3a provided on the first bobbin 1 are automatically brought into contact with the first bobbin 1 as the second bobbin 5 is combined and fixed. shall be taken as a thing.

The terminal 3a and the protruding portion 1 of the relay terminal 10 are in contact with each other in this way.
0C is further soldered 11 as shown in FIGS. 8 and 9.

As described above, according to the present invention, the T-shaped terminal provided on the flange at the end of the second bobbin is in contact with the terminal of the first bobbin, and the lead wire is not inserted at least in the area between the two. Since there is no lead wire, it is possible to eliminate the possibility that the lead wire will be disconnected due to resin molding or the like.

Moreover, workability is also advantageous compared to the conventional example, and the present invention is extremely useful.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the main parts of a conventional flyback transformer, and FIG. 2 is a side view showing its constituent parts. Fig. 3 is a cross-sectional view of the main parts of a flyback transformer embodying the present invention, Fig. 4 is a side view showing its constituent parts, and Figs. 5 and 6 are perspective views of parts used in the present invention. , FIG. 7 is an enlarged view of the main part of FIG. 4, FIG. 8 is an enlarged view of the main part of FIG. 3, and FIG. 9 is an explanatory diagram of the flyback transformer of the present invention. 1...First bobbin, 2...Next coil, 3, 3a...Metal terminal, 4...Terminal holding part, 5...・・2nd bobbin, 6, 6a・・・・
...Brim, 7...Secondary coil, 7a...
Secondary coil lead wire, 10...T-type terminal.

Claims (1)

[Scope of utility model registration request] A part of the coil is wound around a cylindrical first bobbin that has a terminal holding part with a metal terminal embedded in parallel to the bobbin axis at one end, and a secondary coil is wound around a cylindrical second bobbin that has a plurality of flanges. death,
The second bobbin is assembled such that the second bobbin is located on the first bobbin, and the lead wire of the secondary coil is connected to the metal terminal. A terminal is attached, and the lead wire of the secondary coil is connected to this terminal, and when the first and second bobbins are combined, a part of the T-shaped terminal comes into contact with the terminal of the first bobbin. Features a flyback transformer.