JPH11329859A - Winding component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive reduction in the thickness of a winding component. SOLUTION: A C core 7 formed into a rectangular shape is combined with an I core 5 arranged in such a way as to oppose to the core 7 between an open end part 7a of the core 7 and an opposing frame side 7b to the end part 7a with prescribed gaps g1 and g2 between the core 7 and the core 5 in the widthwise and lengthwise directions of the core 7 to constitute a closed magnetic circuit core. This closed magnetic circuit core is mounted to a coil part 4 to constitute a winding component. The combination of this closed magnetic circuit core is formed into a constitution, wherein the structural limitation of the core is not placed on the heightwise direction of the core. As a result, even if the thickness of the winding wire of the coil part 4 is formed thin, the winding component can be made thin in the state corresponding to this coil part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding component such as a transformer and a choke coil, and more particularly to a structure for reducing the size and thickness of a winding component.

[0002]

2. Description of the Related Art FIG. 3 is an exploded perspective view showing the structure of a conventionally used winding part.

[0003] As shown in the figure, this winding component is a synthetic resin hollow bobbin 1 provided with input / output terminals 3 at both left and right ends.
A coil portion 4 having a conductive wire 2 wound therearound, a ferrite frame core 6 having an elongated rectangular shape, and a ferrite I-shaped core 5 having substantially the same dimensions as the frame core 6. A winding component is assembled by inserting the I-shaped core 5 into the hollow portion of the portion 4 from the lateral direction and mounting the I-shaped core 5 so as to cover the frame-shaped core 6 from above the coil portion 4.

[0004] By this assembling, the I-shaped core 5 is fitted and fixed to the cutout portion 6a of the frame-shaped core 6, and the combination of the I-shaped core 5 and the frame-shaped core 6 causes a closed magnetic path core (FUI).
Mold closed magnetic circuit core), and a closed magnetic circuit is formed inside the frame-shaped core 6.

[0005]

In recent years, there has been a great demand for smaller and thinner electronic components mounted on an electronic circuit board in accordance with the trend of miniaturization of electronic equipment. In addition, thinning is an important issue.

By the way, in order to reduce the thickness of the winding component, the thickness of the coil portion 4 must be reduced (that is, the bobbin 1 is lengthened to reduce the winding thickness). Accordingly, the thickness of the closed magnetic path core needs to be reduced.

However, in the case of the above-mentioned FUI type closed magnetic circuit core, as shown in FIG. 4, the thickness a of the combined surface of the frame type core 6 and the I type core 5 and the gap length between the I type core 5 Since each of g has a structure related to the height direction of the core, the thickness a and the gap length g of the combined surface need to be formed as thin as possible in order to reduce the thickness. However, in view of the strength of the core itself, the ease of matching the inductance, and the like, it is difficult to reduce the thickness unnecessarily, so that the size in the height direction is limited to some extent. Therefore, the height dimension of the coil component does not depend on the thickness of the coil part 4 itself, but rather is determined by the combination dimension of the frame-shaped core 6 and the I-shaped core 5.

As described above, the winding parts using the conventional FUI type closed magnetic circuit core are subject to structural restrictions for thinning.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional disadvantages, and comprises a magnetic path core composed of a combination of a C-shaped core and an I-shaped core, thereby providing a structurally high height. It is an object of the present invention to provide a winding component which has no relation and can be made thin.

[0010]

That is, the winding component of the present invention comprises a rectangular C-shaped core (7) and an open frame (7b) from the open end (7a) of the C-shaped core (7). ), A closed magnetic path is formed by a combination with a predetermined gap (g1) in the width direction and an I-shaped core (5) arranged so as to face with a predetermined gap (g2) in the length direction. It is formed by applying a winding to the closed magnetic path.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded perspective view of a winding part according to the present invention, and FIG. 2 is a perspective view showing a combined state of a closed magnetic path core used in the winding part. To simplify the description, the same reference numerals are used in the following description for portions common to the related art.

As shown in FIG. 2, the magnetic path core used in the winding component is a CI type closed magnetic path core composed of a combination of an elongated rectangular C-shaped core 7 and an I-shaped core 5. is there. The FUI type closed magnetic circuit core shown in FIG. 4 is arranged and fixed so that the leading end portion thereof abuts on the opposite frame side 7b from the open end portion 7a of the C-shaped core 7. A closed magnetic path having the same positional relationship as that of the above can be formed.

As shown in the figure, in the CI type closed magnetic circuit core, a gap g1 in the width direction is formed between the open end 7a of the C-shaped core 7 and both side surfaces of the front end of the I-shaped core 5.
Further, a gap g2 in the length direction is formed between the opposing frame side 7b of the open end 7a and the front end of the I-shaped core 5 facing the open end 7a.

With such a configuration, there is no limit in the height direction when combining the closed magnetic circuit cores, and the adjustment of the gaps g1 and g2 is made in the length direction or the width direction. The thickness of the closed magnetic circuit core is
It can be thinner than the I-type. Therefore, it is possible to configure a thin closed magnetic path core corresponding to the thickness of the coil portion 4 (the winding thickness of the hollow bobbin 1) corresponding to the reduction in thickness.

By mounting the closed magnetic circuit core of the present embodiment on the coil portion 4, a thin-shaped winding component can be manufactured. The assembling can be performed in the same manner as in the related art. That is, as shown in FIG. 1, the I-shaped core 5 may be inserted into the hollow bobbin 1 of the coil part 4 from the lateral direction, and may be mounted so as to cover the C-shaped core 7 from above the coil part 4. At this time, the open portion 7 of the C-shaped core 7
a may be the insertion direction of the I-shaped core 5 or vice versa.

[0017]

As described above, according to the present invention,
A combination of a C-shaped core having a rectangular shape and an I-shaped core arranged so as to face a side of an opposing frame from an open end of the C-shaped core with a predetermined gap in a width direction and a length direction thereof. Since the closed magnetic path is formed, there is no restriction in the height direction when combining the closed magnetic path cores, and the gap between the C-shaped core and the I-shaped core is adjusted in the length direction or the width direction. The combined thickness of the closed magnetic circuit core can be made smaller than that of the FUI type.
Thus, the thickness of the winding component can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a winding component according to the present invention.

FIG. 2 is a perspective view of a closed magnetic circuit core used for the winding component of FIG. 1;

FIG. 3 is an exploded perspective view of a conventional winding component.

FIG. 4 is a perspective view of a closed magnetic circuit core used for the winding component of FIG. 3;

[Explanation of symbols]

 5 I-shaped core 7 C-shaped core 7a Open end 7b Opposite frame side g1 Gap in width direction g2 Gap in length direction

Claims (1)

[Claims] 1. A C-shaped core (7) having a rectangular shape,
Opposite frame side (7b) from open end (7a) of shaped core (7)
A closed magnetic path is formed by a combination with a predetermined gap (g1) in the width direction and an I-shaped core (5) arranged so as to face with a predetermined gap (g2) in the length direction. And a winding part formed by winding the closed magnetic path.