JP2531575Y2 - Thin transformer - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to the structure of a transformer.
In particular, the present invention relates to a coil structure of a thin transformer.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, the structure of a coil of this type of transformer is as follows: an insulating substrate 6 for electrically insulating each layer and a primary coil 8 made of a spiral conductor.
And a secondary coil made of a U-shaped conductor are made separately and stacked alternately to incorporate a ferrite core. The connection between the primary coil and the secondary coil is connected outside the transformer. As a result, there may be a problem in safety with respect to electrical insulation characteristics due to man-hours for stacking and misalignment generated during stacking.

[0003]

SUMMARY OF THE INVENTION In order to solve these problems, the present invention solves these problems by providing a spiral coil-shaped primary coil between insulating layers for electrically insulating the respective layers, and a U.S. Pat. A secondary coil made of a U-shaped conductor is laminated, and the insulating substrate, the primary coil, and the secondary coil are positioned using a mold with reference to the outer dimensions of the insulating substrate, the primary coil, and the secondary coil. The through-hole is provided at the same position as above, the layers are stacked on a mold, and each layer is connected by solder using the through-hole, so that the coil winding process and the stacking process are omitted, greatly reducing the number of manufacturing steps. It is another object of the present invention to provide a thin transformer which is free from a risk of electrical insulation failure due to positional displacement since each layer is connected using through holes.

[0004]

According to the present invention, an insulating substrate constituting a thin transformer, a primary coil composed of a spiral conductor, and a secondary coil composed of a U-shaped conductor are integrated. The laminated substrate has a structure in which the insulating substrate and one end of the spiral conductor of the primary coil are not connected to the conductor of the secondary coil by through holes provided at the same position. It is characterized in that a thin transformer having a primary coil and a secondary coil, which are electrically insulated by being positioned by a mold and soldered, is formed.

That is, the present invention provides: A thin transformer in which an insulating substrate is arranged between layers, and a spiral conductor of a primary coil and a U-shaped conductor of a secondary coil are alternately laminated between the insulating substrates, and a ferrite core is incorporated in a central through hole and formed. At
Primary coil whose insulating substrate and spiral direction are opposite to each other
A thin transformer characterized in that through-holes are provided at predetermined positions for each layer in any one of the conductors of the next coil, soldered, and fixed by lamination. 2. 3. The method according to claim 1, wherein a spiral coil whose winding directions are opposite to each other, a primary coil formed at the other end inside the laminated body is fixed by soldering integrally with the insulating substrate by a through hole. It is a thin transformer corresponding to the contents described above.

[0006]

The insulating substrate constituting the thin transformer and the winding ends of the primary coil are fixedly connected by solder through through holes attached to the common positions of the layers, and the secondary is connected when the primary coil is connected by solder through the through hole. The coil is made to deviate from the position of the through hole. Each layer is positioned using a mold that determines the outer position, and each layer is soldered and fixed by the through hole.
The connection of the secondary coil and the positioning of the secondary coil can be performed simultaneously by solder connection of the through holes.

[0007]

FIG. 1 is a perspective view showing the structure of a thin transformer according to the present invention, in which an insulating substrate 1, a left-handed spiral primary coil A, 2a, a right-handed spiral primary coil B, 2b, a wide width are shown. 1 shows the internal structure of a thin transformer in which U-shaped secondary coils A and 3a made of the following conductors and secondary coils B and 3b of the same shape are integrated. The primary coil made of a spiral conductor is wound in this embodiment. It is composed of two layers of primary coils A and 2a and primary coils B and 2b having different directions, and is connected in series at the other end of the internal winding when connected by solder through the through hole 4. When the primary coil is integrally soldered through the through-hole, the conductor of the secondary coil is located at a position deviated from the position of the through-hole and is respectively positioned by the insulating substrate 1. However, the secondary coil has a U-shape. It is made of a conductor, and in this embodiment, the position of the external connection terminal is the secondary coil A, 3a.
And the secondary coils B and 3b have different structures, and the winding ratio of the primary coil and the secondary coil is set by the winding ratio of the primary coil and the number ratio of the primary coil and the secondary coil.

FIG. 2 shows a state in which a primary coil and a secondary coil are laminated on the insulating substrate 1. The insulating substrate 1, the primary coil, and the secondary coil are integrally formed in the insulating substrate 1 having the through holes 4. 1 shows a coil molded body of a thin transformer in which a primary coil terminal 2 and a secondary coil terminal 3 are outside the coil molded body.

FIG. 3 shows one embodiment of a completed thin transformer in which the ferrite core 5 is incorporated in the coil molded body of the thin transformer according to the present invention, and 2 shows a primary coil terminal, a secondary coil terminal 31 and a secondary coil. When the terminal 32 is connected, the secondary coil is connected in series between the secondary coil terminal 3 and the secondary coil terminal 33, and when the secondary coil terminals 3, 32 and the secondary coil terminals 31, 33 are connected, they are connected in parallel. Connection.

The thin transformer according to the present invention has a structure in which a primary coil and a secondary coil are formed on the basis of an insulating substrate, and furthermore, each layer and the exterior are electrically insulated by the insulating substrate. It is not necessary to consider
When manufacturing a transformer, there is no need for a conventional coil winding step or a step of alternately stacking primary and secondary coils, which greatly reduces the number of manufacturing steps and increases or decreases the number of turns required for the spiral conductor of the primary coil. And the end of the winding can be pulled out by connecting in reverse, and the primary coil and the secondary coil can be repeated as in the embodiment. The improved connectivity is improved.

In the thin transformer according to the present invention, the primary coil has been described as a spiral-shaped conductor having a large number of turns in opposite directions, and the secondary coil has been described as a U-shaped conductor, but the primary coil is a U-shaped conductor. It goes without saying that the secondary coil may be a thin transformer in which the number of turns is made of spiral-shaped conductors in opposite directions.

[0012]

[Effect of the Invention] By using the thin transformer according to the present invention, the primary coil can be soldered at one end of the coil conductor end inside the laminated body by a through hole, and external connection is not required. Since the primary coil and the secondary coil are integrally connected and fixed by solder through a through hole, the winding connection step and the stacking step can be eliminated, the number of manufacturing steps can be greatly reduced, and the position is fixed by the solder at the position of the through hole. It is possible to provide a thin transformer having an advantage of improving electrical safety without deviation and improving electromagnetic coupling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the internal structure of a thin transformer according to the present invention.

FIG. 2 is a perspective view of a coil laminate in which an insulating substrate, a primary coil, and a secondary coil of the thin transformer according to FIG. 1 are laminated and connected by soldering through holes;

FIG. 3 is a perspective view of a thin transformer showing an embodiment of the present invention in which a ferrite core is incorporated in the coil laminate shown in FIG. 2;

FIG. 4 is a perspective view showing the internal structure of a conventional thin transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating board 2 Primary coil terminal 2a Primary coil A 2b Primary coil B 3 Secondary coil terminal 3a Secondary coil A 3b Secondary coil B 4 Through hole 5 Ferrite core 6 Insulating substrate 7 Secondary coil 8 Primary coil 9 Through-hole 31 Secondary coil terminal 32 Secondary coil terminal 33 Secondary coil terminal

Claims (2)

(57) [Scope of request for utility model registration] An insulating substrate is disposed between layers, and a spiral conductor of a primary coil and a U-shaped conductor of a secondary coil are alternately laminated between the insulating substrates, and a ferrite core is provided in a central through hole. In the built-in thin transformer, through-holes are provided at fixed positions for each layer on the insulating substrate and the conductor of either the primary coil or the secondary coil whose spiral directions are opposite to each other, and they are connected by soldering and fixed by lamination A thin transformer characterized by the following. 2. A spiral coil whose winding directions are opposite to each other, and a primary coil formed at the other end of the inside of the laminated body is fixed by soldering integrally with an insulating substrate by a through hole. The thin transformer according to claim 1.