JP2552047Y2 - Thin transformer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a thin transformer having improved electromagnetic coupling characteristics mounted on an electronic device.

[0002]

2. Description of the Related Art Conventionally, this type of thin transformer has a U-shaped thin conductor 5 as shown in FIGS. 4 (a) and 4 (b) centered on a magnetic core, and a spiral conductor. 3 are alternately stacked. However, in the U-shaped thin plate-shaped conductor 5, the drawer side is largely open, and there is a portion where current does not flow. The electromagnetic coupling through the magnetic core of the current flowing through the conductors in the form of a conductor is loosened, the joint area between the conductors forming the coil is small, and the electromagnetic coupling characteristics between the conductors are poor.

[0003]

SUMMARY OF THE INVENTION In order to eliminate the drawbacks described above, the present invention provides a U-shaped conductor such that the terminal lead-out side of a U-shaped thin plate conductor encloses the center leg of the magnetic core of the magnetic core. By providing a protruding portion on the inside and a groove from the outside of the U-shaped conductor to the front of the inside of the protruding portion, the junction area between the U-shaped thin plate conductor and the spiral conductor is increased, It is another object of the present invention to provide a thin transformer having improved electromagnetic coupling characteristics between a spiral conductor and a U-shaped thin conductor between a magnetic core.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a thin transformer having a structure in which a U-shaped thin plate conductor and a spiral conductor are alternately stacked, and a terminal lead-out side of the U-shaped thin plate conductor. A U-shaped structure in which a projection is provided inside one or both conductors in a portion of the conventional open shape, and a cut groove is provided from the outside of the conductor provided with the projection to the front of the inside of the projection. A thin-plate conductor that expands the junction area between two conductors, a U-shaped thin-plate conductor and a spiral conductor, and between the two conductors via the magnetic core in the center of the transformer. Characterized by improving the electromagnetic coupling characteristics of the device.

That is, according to the present invention, in a thin transformer in which a U-shaped thin body and a spiral conductor or a U-shaped thin plate conductor are stacked together, the terminal lead-out side of the U-shaped thin plate conductor is provided. A thin transformer characterized in that a projection is provided on the inside of the terminal lead-out side so as to enclose the center leg of the magnetic core, and a cut groove is provided from the outside of the projection to the front of the inside of the projection.

[0006]

According to the present invention, the conventional U-shaped conductor has a shape in which the conductor is open at the terminal lead-out side of the conductor.
The conductor in the shape of a thin plate is projected inside the terminal lead-out side so that the current flowing through the conductor inside one or both of the conductors inside the conductor is more annularly flowing to the magnetic core in the center of the transformer. A portion is provided, and a kerf is provided from the outside of the conductor provided with the protrusion to the front of the inside of the protrusion, so that the current flowing through the U-shaped thin plate conductor flows more annularly with respect to the magnetic core, The junction area with the spiral conductor is increased, and the electromagnetic coupling between the U-shaped thin plate conductor and the spiral conductor is increased to improve the characteristics of the thin transformer. The width of the kerf provided on the outside of the conductor of the U-shaped thin plate is increased so that the current density of the conductor of the U-shaped thin plate does not become excessive, thereby allowing the conductor of the U-shaped thin plate to spiral. The effect of the electromagnetic coupling with the conductor in the shape of a circle becomes greater.

[0007]

FIG. 1A shows a U-shaped thin plate conductor having projections attached to both sides of a terminal lead-out side of the present invention. The cut groove 10 is provided up to the inner side. FIG. 2 is an exploded perspective view of the thin transformer according to the present invention.
The insulating sheet 7, the U-shaped thin plate conductor 1, the insulating sheet 7, the spiral conductor 3, the base 8, and the ferrite core 6 are laminated in this order to constitute the thin transformer of the present invention. FIG. 3 shows a completed body assembled by stacking a U-shaped thin plate conductor 1, a spiral conductor 3, and an insulating sheet 7 and fixing them with a magnetic core fixing tape 9. FIG. 4B shows a comparison of the degree of overlap with the spiral conductor and the degree of overlap with the conventional conductor. The thin transformer according to the present invention has the conventional U-shaped terminal lead-out side open. FIG.
The overlap between the center leg 4 of the magnetic core and the spiral conductor 3 shown in FIG. 1B and the electromagnetic coupling are achieved by the spiral conductor and the U-shaped conductor according to the present invention shown in FIG. And the coupling characteristics between the two conductors are improved, and the electromagnetic conversion characteristics between the primary side and the secondary side of the transformer are improved as compared with the related art.

The projections provided on the U-shaped thin plate conductor according to the embodiment of the present invention are shown as examples provided on both of the lead-out conductors inside the terminal lead-out side. A thin transformer with a U-shaped thin conductor of the structure of the present invention laminated in place of the spiral conductor may be used as a thin transformer superior to conventional transformers of this type. Can be a transformer.

[0009]

As described above, according to the present invention, there is provided a thin transformer in which a projection is provided on the terminal lead-out side of a U-shaped thin plate conductor, and a groove is provided from the outside of the projection to the inside of the projection. By doing so, it has become possible to provide a thinner transformer than before.

[Brief description of the drawings]

FIG. 1 shows the shape of a U-shaped thin conductor of a thin transformer of the present invention, and FIG. 1 (a) shows a groove on a terminal lead-out side from a protrusion and an outer side of the protrusion to an inner side of the protrusion. FIG.
FIG. 1B is a plan view showing a joint state between a U-shaped thin plate conductor with a protruding cut groove and a spiral conductor according to the present invention.

FIG. 2 is an exploded perspective view of the thin transformer according to the present invention.

FIG. 3 is an external perspective view showing the completed thin transformer according to the present invention.

4A and 4B are diagrams showing the shape of a conventional U-shaped thin plate conductor. FIG. 4A is a plan view of a U-shaped thin plate conductor, and FIG.
(B) is a plan view showing a joint state between a conventional U-shaped thin plate conductor and a spiral conductor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 U-shaped thin-plate conductor 2 Projection 3 Spiral-shaped conductor 4 Core of magnetic core 5 U-shaped thin-plate conductor 6 Ferrite core 7 Insulating sheet 8 Base 9 Core fixing tape 10 Cut groove

Claims (1)

(57) [Scope of request for utility model registration] 1. A thin transformer in which a U-shaped thin plate conductor and a spiral conductor, or a U-shaped thin plate conductor are stacked on each other, the terminal lead-out side of the U-shaped thin plate conductor is set to be one. It is made of a U-shaped thin plate conductor with a projection provided on the inside of the terminal lead-out side so as to enclose the center leg of the magnetic core, and a cut groove provided from the outside of the projection to the front of the inside of the projection. Thin transformer.