JP3236521B2 - Thin transformer and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin transformer,
In particular, it relates to a terminal structure of a thin transformer.

[0002]

2. Description of the Related Art Conventionally, a terminal structure of a thin transformer of this type is as shown in FIG. That is, a thin coil a made of a strip-shaped copper foil wound around a thin ferrite core A
Was used as a terminal b. To this end, a hole E is provided directly in the thin base B, and the tip of the thin coil a is passed directly through the hole E to be shaped as a terminal b. The terminal b has a structure in which the terminal b is not soldered at the position of the hole E, but is drawn out and shaped to the rear surface of the thin base, and then the terminal b is directly soldered to a conductor pattern or the like of a substrate. In another method, a terminal such as a pin terminal is fixed to the thin base B in advance, and the thin coil a
Was fixed by soldering with a soldering iron or the like.

[0003]

Therefore, the processing and processing of the terminal requires a lot of man-hours, and the thin coil a
Insulation is inadequate due to the exposed end, or soldering of the end is performed with a soldering iron, etc. There was a drawback.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a thin transformer having a structure capable of eliminating solder defects, further reducing the number of processing steps for terminals, and further improving the safety by protecting the insulation. That is.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a thin coil is sandwiched between a thin base and an insulating cover and the periphery thereof is heated so that soldering can be performed. In addition, the number of processing steps for terminals can be reduced, and by using an insulating cover together, soldering work can be performed with solder embedded in the insulating cover. Eliminate and protect the insulation to provide a thin transformer with improved safety.

That is, the present invention provides a magnetic core made of a magnetic material,
A thin coil made of a strip-shaped copper foil, a thin base in which terminals made of a conductor are fitted in a plurality of grooves provided at both ends of a rectangular insulator, and both ends of the thin base A groove is formed at a position corresponding to the groove, and a locking piece for locking to the thin base is provided on both side surfaces orthogonal to the surface on which the groove is formed. , And mounted on the terminals of the thin base so that the tips of the thin coils coincide with each other, and the magnetic core is incorporated in the center of the thin base, The concave groove of the cover is arranged on the terminal at the tip of the thin coil and is engaged with the thin base with the locking piece, and the terminal of the thin base, the tip of the thin coil, and the groove of the insulating cover are soldered. A thin transformer characterized by being electrically connected.

According to the present invention, a strip-shaped terminal is formed by embedding solder in a plurality of grooves provided at both ends of a rectangular insulator and fitting a terminal made of a conductor into the groove. After placing the tip of the thin coil made of copper foil so that it matches,
A magnetic core made of a magnetic material is incorporated in the center of the thin base, and solder is buried in a groove provided at a position corresponding to a groove provided at an end of the thin base, and the groove is formed. The cross-section of the insulating coil is provided with locking pieces for locking to the thin base on both sides perpendicular to the surface on which the solder is embedded. After the insulating cover and the thin base are engaged and fixed by a locking piece provided on the insulating cover, the peripheral portion of the terminal is heated to A method of manufacturing a thin transformer, comprising: electrically connecting a terminal of a base, a tip of the thin coil, and a groove of the insulating cover in which solder is embedded.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of a thin transformer. FIG. 2 is an assembled perspective view of the thin transformer. FIG. 3 is a front view showing a state before the insulating cover is attached to the thin transformer. FIG. 4 is a side view of FIG. FIG. 5 is a right side view of the insulating cover. FIG. 6 is a front view of FIG.
FIG. 7 is a left side view of the insulating cover. FIG. 8 is an enlarged front view of the distal end portion of the thin base.

In FIG. 1, solder f is buried in a plurality of grooves d provided at both ends of a thin base B in order to connect and fix a tip end h of the thin coil a so as to surround the groove d. The terminal b bent into a U-shape is fitted, the embedded solder f is melted, and the terminal b and the tip h of the thin coil a are fitted to the terminal b fitted in the groove d at the end of the thin base. Fix by soldering. The terminal b and the end of the thin coil a are connected by arranging the terminal b so as to enclose the solder f as shown in FIGS. After applying heat to the solder f embedded and arranged in the groove d provided at the position of the tip of the base B to fix the terminal b to the tip h of the thin coil a shown in FIG. Then, the insulating cover C (see FIG. 5) is moved in the direction of the arrow e as shown in FIG. FIG.
As shown in FIG. 6, the solder f is embedded in the concave groove i of the insulating cover C. As shown in FIG. 6, the portion of the concave groove i in which the solder f is embedded is the tip h of the thin coil a shown in FIG. Due to the structure of pressing, soldering can be performed reliably at the time of soldering. As shown in FIGS. 6 and 7, the insulating cover C
Forms a cavity H, which not only protects the tip h of the thin coil a shown in FIG. 1 but also acts to insulate a plurality of laminated thin coils a themselves. The appearance of the assembled thin transformer has a box shape as shown in FIG. 2, eliminates solder defects, and furthermore, the insulating cover C insulates and protects the coil portion, thereby completing a thin transformer with an emphasis on safety.

[0011]

As described above, according to the present invention, the soldering work using a soldering iron can be made unnecessary, so that the number of steps of assembly and soldering work can be reduced, the conduction defect can be eliminated, and the thin type can be achieved. By eliminating the exposed portion of the coil and performing insulation protection, a thin transformer with improved electrical safety can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a thin transformer according to the present invention.

FIG. 2 is an assembled perspective view of the thin transformer of the present invention.

FIG. 3 is a front view showing a state before an insulating cover is attached to the thin transformer of the present invention.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a right side view of the insulating cover of the present invention.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a left side view of the insulating cover of the present invention (a view as seen from the opposite direction of FIG. 5).

FIG. 8 is an enlarged front view showing a terminal, a groove, and solder at the tip of the thin base of the present invention.

FIG. 9 is an assembled perspective view of a conventional thin transformer.

[Explanation of symbols]

 A magnetic core B thin base C insulating cover E hole H cavity a thin coil b terminal d groove e arrow f solder h tip of thin coil i concave groove j locking piece

Claims (2)

(57) [Claims] 1. A terminal made of a conductor is fitted into a magnetic core made of a magnetic material, a thin coil made of a strip-shaped copper foil, and a plurality of grooves provided at both ends of a rectangular insulator. The thin base and concave grooves are formed at positions corresponding to the grooves at both ends of the thin base, and the thin base is engaged with the thin base on both side surfaces orthogonal to the surface on which the concave grooves are formed. The cross-section provided with the locking pieces is composed of a substantially U-shaped insulating cover,
The tip of the thin coil is placed on the terminal of the thin base so as to match, the magnetic core is incorporated in the center of the thin base, and the concave groove of the insulating cover is inserted into the tip of the thin coil. Is arranged on the terminal of the terminal and is engaged with the thin base with a locking piece,
A thin transformer wherein the terminals of the thin base, the tip of the thin coil, and the groove of the insulating cover are electrically connected by solder. 2. A strip-shaped copper foil is provided on a terminal of a thin base in which solder is buried in a plurality of grooves provided at both ends of a rectangular insulator and terminals made of a conductor are fitted in the grooves. After being mounted so that the tips of the thin coils made of the same shape, a magnetic core made of a magnetic material is incorporated in the center of the thin base, and at a position corresponding to the groove provided at the end of the thin base. Solder is buried in the provided groove, and a locking piece for locking to the thin base is provided on both side surfaces orthogonal to the surface on which the groove is formed. A concave groove in which the solder of the insulating cover is embedded is arranged on a terminal portion at a tip of the thin coil, and then the insulating cover and the thin base are engaged with a locking piece provided on the insulating cover. After fixing by heating the peripheral portion of the terminal, the terminal of the thin base, the tip of the thin coil, And electrically connecting the insulating cover to the groove in which the solder is embedded.