JP3101641B2 - Magnetic element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic element such as an inductor or a transformer used in various electronic devices and communication devices.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. 61-219114 discloses the structure of a conventional woven magnetic element. In a conventional woven magnetic element of this type, as shown in FIG. 7, a magnetic core 1 is bundled by a conductor 2, and the conductor 2 keeps a constant interval between the magnetic cores 1, and both ends of the conductor 2 are plated with solder. And so on.

[0003]

However, when the conductors 2 wound around the magnetic core 1 are used to connect the plurality of magnetic cores 1 so as to maintain a constant magnetic core interval, the magnetic core interval is reduced when an external force is applied. There is a drawback that the electromagnetic characteristics such as inductance change. Also, since the magnetic core has a structure in which fine wires are bundled, and the magnetic path is an open magnetic path,
Electromagnetic characteristics such as inductance change due to the dispersion of the fine wires at both ends of the core, and variations in core diameter, core length, and winding length.
Furthermore, since the terminals for connecting the magnetic element and the printed circuit board or the like are formed by treating both ends of the conductor 2 with solder plating 10 or the like, there is a disadvantage that workability during mounting is poor.

[0004] An object of the present invention is to stabilize the characteristics of a magnetic element and to improve workability when mounting it on various electronic devices, communication devices, and the like, excluding the above-mentioned drawbacks of the prior art.

[0005]

In order to achieve this object, the present invention uses a holder having a concave portion for fixing and inserting a magnetic core made of amorphous fine wire or the like, and inserting and fixing the magnetic core in the concave portion. Prevents the spread of fine wires at both ends and prevents the magnetic core spacing from changing due to external force, stabilizes magnetic coupling by using a soft magnetic material for the holder, and uses the holder for various electronic devices, communication devices, etc. An electrode terminal for mounting is provided.

[0006]

The above technical means operates as follows. By using a holder having a concave portion into which a magnetic core made of a bundle of amorphous fine wires is fixedly inserted, the spread of the fine wires at both ends of the magnetic core can be prevented, and the positioning accuracy of the magnetic core interval can be improved. In addition, the use of a soft magnetic material for the holder stabilizes magnetic coupling.
By providing an electrode for mounting on a communication device or the like, it can be easily mounted on various electronic devices or communication devices.

[0007]

【Example】

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. Numeral 1 is a rod-shaped magnetic core made of a bundle of amorphous fine wires and the like, and has a woven structure with the magnetic core 1 and the conductor 2.

Reference numeral 3 denotes a holder made of an insulating material such as ceramics. The holder 3 is composed of terminals 4 for connecting the conductor 2 and connecting to other elements. The holder recess 5 for inserting and fixing the magnetic core 1 is dug. . In the holder 3, the magnetic core 1 is inserted into the holder recess 5, fixed with an adhesive or the like, and the conductor 2 is connected to the terminal 4.

In the woven fabric magnetic element constructed as described above, since the magnetic core 1 is inserted and fixed in the concave portion 5 of the holder 3, the front end of the magnetic core 1 composed of a bundle of amorphous fine wires or the like does not spread, and an external part is not formed. Since the magnetic core interval does not change due to the force and the accuracy of the magnetic core interval increases, stable electromagnetic characteristics can be obtained. Further, since the terminal 4 to which the conductor 2 is connected is provided, it can be easily mounted on various electronic devices, communication devices and the like.

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described. Example 2
In this embodiment, a soft magnetic material such as ferrite is used as the material of the holder 3 in the first embodiment, and the other configuration is the same as that of the first embodiment.

In the magnetic element configured as described above,
Since the magnetic path has a closed magnetic path structure, the influence of the demagnetizing field is reduced as compared with the first embodiment, and stable electromagnetic characteristics can be obtained. Embodiment 3 Hereinafter, a third embodiment of the present invention will be described with reference to FIGS.

Reference numeral 1 denotes a rod-shaped magnetic core made of a bundle of amorphous thin wires or the like.
Is wrapped around. Reference numeral 3 denotes a holder made of an insulating material such as ceramics, which is a lead connection terminal 6 for connecting the conductor 2 wound around the magnetic core 1, a terminal 4 for connection to another element,
It is composed of a lead connecting terminal 6 and a terminal 4, a wiring 7 connecting between the lead connecting terminals 6, and a holder recess 5 for inserting and fixing the magnetic core 1.

In the magnetic element thus configured, the tip of the magnetic core 1 composed of a bundle of amorphous fine wires and the like does not spread, and the interval between the magnetic cores 1 can be determined with high precision and freedom. Since the magnetic core interval does not change due to external force, stable electromagnetic characteristics can be obtained. Furthermore, since the lead connection terminal 6 to which the conductor 2 is connected and the terminal 4 to be connected to another element are provided, it can be easily mounted on various electronic devices, communication devices and the like.

Embodiment 4 Hereinafter, a fourth embodiment of the present invention will be described. Example 4
The third embodiment uses a soft magnetic material such as ferrite for the material of the holder 3 in the third embodiment, and the other configuration is the same as that of the third embodiment.

In the magnetic element configured as described above,
Since the magnetic path has a closed magnetic path structure, the influence of the demagnetizing field is reduced as compared with the third embodiment, and stable electromagnetic characteristics can be obtained. Embodiment 5 Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS.

Reference numeral 1 denotes a rod-shaped magnetic core made of a bundle of amorphous fine wires or the like, and has a woven structure composed of the magnetic core 1 and the conductor 2. Reference numeral 8 denotes a split-type holder, which comprises a terminal 4 for connecting the conductor 2 and connecting to another element, and a split-type holder recess 9 for inserting and fixing the magnetic core 1.

In the magnetic element configured as described above,
There is no spread of the tip of the magnetic core 1 made of a bundle of amorphous thin wires, etc., and the distance between the magnetic cores 1 can be determined with high precision and freedom. Obtainable. Also,
The terminal 4 for connection with the conductor 2 and other elements is provided, and furthermore, the split type holder 8 is used to be inserted and fixed at both ends of the magnetic core 1. Easy.

Embodiment 6 Hereinafter, a sixth embodiment of the present invention will be described. Example 6
In the fifth embodiment, a soft magnetic material such as ferrite is used as the material of the split holder 8 in the fifth embodiment, and the other configuration is the same as that of the fifth embodiment.

In the magnetic element constructed as described above, the tip of the magnetic core 1 made of a bundle of amorphous thin wires and the like does not spread, and the magnetic path has a closed magnetic path structure. The influence is reduced, and stable electromagnetic characteristics can be obtained. Further, since the holder is divided, the magnetic element can be easily assembled.

[0020]

As described above, according to the present invention,
In a magnetic element having a magnetic core composed of a bundle of amorphous thin wires, by using a holder having a concave portion for fixingly inserting the magnetic core, the tip of the magnetic core is prevented from spreading, and a highly accurate magnetic core interval is obtained. Further, since the magnetic core interval does not change even when a force is applied from the outside, stable electromagnetic characteristics can be obtained. Further, by providing a lead connection terminal for connecting the conductor to the holder and providing a terminal for mounting on various electronic devices, communication devices, and the like, mounting on various electronic devices, communication devices, and the like is facilitated.

Furthermore, by using a soft magnetic material such as ferrite for the material of the holder, compared to a non-magnetic holder,
The effect of the demagnetizing field is reduced, and stable electromagnetic characteristics can be obtained. In addition, by assembling the holder and separating the holder into which the substrate and the magnetic core are fixedly inserted, assembly of the magnetic element is facilitated.

[Brief description of the drawings]

FIG. 1 is a top view of a magnetic element showing first and second embodiments of the present invention.

FIG. 2 is a front view of a magnetic element showing first and second embodiments of the present invention.

FIG. 3 is a top view of a magnetic element showing third and fourth embodiments of the present invention.

FIG. 4 is a front view of a magnetic element showing a third and a fourth embodiment of the present invention.

FIG. 5 is a top view of a magnetic element showing a fifth and a sixth embodiment of the present invention.

FIG. 6 is a front view of a magnetic element showing a fifth and a sixth embodiment of the present invention.

FIG. 7 is a top view of a conventional woven magnetic element.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magnetic core, 2 ... Conductor, 3 ... Holder, 4 ... Terminal, 5 ... Holder recess, 6 ... Lead connection terminal, 7 ... Wiring, 8 ... Split type holder, 9 ... Split type holder recess, 10 ... Solder plating.

Continuation of the front page (72) Inventor Hiroaki Kurata 6-6-6 Minamiyoshinari, Aoba-ku, Sendai City, Miyagi Prefecture Inside Amorphous and Electronic Devices Research Laboratories Co., Ltd. (56) References JP-A-55-107212 (JP, A) 61-49419 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 17/04

Claims (2)

(57) [Claims] 1. A plurality of rod-shaped magnetic cores made of a bundle of fine wires, a conductor wound around the plurality of magnetic cores, a terminal for connecting the conductor to another component or device, and both ends of each of the magnetic cores are inserted. A magnetic element comprising: a holder having a recess for fixing. 2. The magnetic element according to claim 1, wherein a magnetic material is used as a material of the holder.