JP2586599Y2 - Impedance element - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impedance element, and more particularly to a structure thereof.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing a configuration example of a conventional chip type impedance element. In FIG. 1, reference numeral 1 denotes a substantially rectangular parallelepiped ferrite core having two through holes 3. Reference numeral 2 denotes an electrode, and 4 denotes a conductor. That is, the element shown in FIG.
Through the path of the conductor 4b, the through hole 3b, and the conductor 4c, there is electrical conduction from one electrode 2 to the other electrode 2, and functions as an impedance element having a predetermined inductance.

[0003]

However, the above technique has the following problems. (1) The impedance is determined by the shape, size, and material of the ferrite core 1, and the ferrite core 1 must be changed to obtain an element having a slightly different impedance. (2) Since the electrodes 2, the through holes 3 and the conductors 4 are formed by thick-film printing or vapor deposition, the manufacturing process is complicated, and it is difficult to increase the cross-sectional area of the conductors. Element cannot be realized.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide an impedance element having a large allowable current and a simple configuration capable of easily obtaining an arbitrary impedance.

[0005]

The present invention has the following configuration as one means for achieving the above-mentioned object. The impedance element according to the present invention includes a first magnetic core, a plate-shaped conductor bent into a predetermined shape to be inserted into an opening of the first magnetic core, the first magnetic core, and the first magnetic core. A plurality of second magnetic cores inserted into a plurality of recesses formed by the conductor inserted into the magnetic core, and a cross-sectional shape of each of the second magnetic cores along an insertion direction is substantially L or substantially T-shaped. It is characterized by the shape.

A first magnetic core having an opening and a concave portion on a side surface inside the opening, a plate-shaped member inserted into the opening of the first magnetic core and bent into a predetermined shape, and A conductor having a plurality of projections on its surface, a plurality of recesses formed by the first magnetic core and a plurality of recesses formed by a conductor inserted into the opening of the first magnetic core, and a plurality of recesses provided at the insertion site. Having a second magnetic core, the cross-sectional shape along the insertion direction of each of the second magnetic cores is substantially L or substantially T-shaped, and the concave portions of the first and second magnetic cores, The plurality of projections are fitted with each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An impedance element according to an embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration example of an impedance element according to an embodiment of the present invention, showing an example of a state before assembly.

In FIG. 1, reference numeral 11 denotes a substantially box-shaped magnetic core a, 1
Reference numeral 2 denotes a substantially wedge-shaped magnetic core b made of a magnetic material such as ferrite. The magnetic material forming the magnetic cores a and b depends on the specifications of the impedance element of the present embodiment, that is, the operating frequency band and the impedance.
Choose the right one. Reference numeral 13 denotes a conductor having a substantially W-shaped cross section, which is formed, for example, by processing a copper plate or the like having a predetermined thickness into a predetermined shape. The surface of the conductor 13 is subjected to soldering or the like in order to improve corrosion prevention and solderability.

FIG. 2 is a view showing an example of a completed state of the present embodiment. FIG. 2A is a perspective view of the present embodiment, and FIG.
It is arrow A sectional drawing. As shown in FIG.
For example, the conductor 13 and the two magnetic cores b12 are inserted into the opening of the magnetic core a11 in this order. The terminal portion 13a of the conductor 13 inserted into the magnetic core a11 functions as an electrode for connecting to an external circuit. In this embodiment, if necessary,
The magnetic core a11, the conductor 13, and the magnetic core b12 are fixed with an adhesive or the like.

As described above, the main configuration of the present embodiment is formed. Finally, the impedance element of the present embodiment is completed through steps such as marking and inspection. As described above, since the present embodiment is configured by a plurality of magnetic cores,
For example, elements having different impedances can be obtained by changing the magnetic material of the magnetic core b12 without changing the magnetic core a11.

FIG. 3 shows an example of the relationship between the relative permeability and the impedance of the magnetic core b12. FIG. 3A shows an example of a combination of magnetic cores, and FIG. It is a figure showing a measurement result. Note that the horizontal axis in FIG. 3B represents the measurement frequency f [MHz], and the vertical axis represents the measured impedance Z [Ω]. As shown in the figure,
When a magnetic core a11 having a relative magnetic permeability μ = 300 is combined with a magnetic core b12 having μ = 1,000, an impedance characteristic as indicated by 31 is obtained, and when a magnetic core b12 with μ = 300 is combined, an impedance characteristic as indicated by 32 is obtained. When the characteristics are combined with the magnetic core b12 of μ = 40, impedance characteristics as indicated by 33 can be obtained.

In this embodiment, the combinations of the magnetic cores are not limited to those shown in FIG. 3B, and any combination can be selected according to the required impedance characteristics. As described above, according to this embodiment, elements having different impedances can be easily obtained only by changing the magnetic core b12 to one having a different magnetic permeability.

Further, according to this embodiment, the conductor and the electrode can be formed by processing a copper plate or the like, so that the production is easy.
In addition, since a conductor having a sufficient cross-sectional area can be used, an element having a large allowable current can be easily realized. Further, in the above description and drawings, an example is shown in which the conductor 13 is substantially W-shaped. However, the present embodiment is not limited to this. For example, a substantially U-shaped conductor 13 shown in FIG. It can also be in the shape of a letter or in a substantially wave shape as shown in FIG. However, the magnetic core needs to have a shape as shown in FIGS. 4 and 5 according to the shape of the conductor 13. The shape shown in FIG. 4 is suitable for forming a device having a relatively low impedance, and the shape shown in FIG. 5 is suitable for forming a device having a relatively high impedance.

[0014]

Second Embodiment Hereinafter, an impedance element according to a second embodiment of the present invention will be described. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 6 is a diagram showing a configuration example of the second embodiment, showing an example of a state before assembly.

In FIG. 1, reference numeral 14 denotes a claw provided on the conductor 13, 15 denotes a substantially rectangular parallelepiped recess provided on the magnetic core b12, and 16 denotes a substantially rectangular parallelepiped recess provided on the magnetic core a11. Although not shown in FIG. 6, claws 14 are provided at, for example, four positions of the conductor 13, and the conductor 1
3 The claw 14b provided in the substantially inverted U-shaped portion substantially at the center is opened in a direction to insert the conductor 13 into the magnetic core a11, and the claw 14a provided in the substantially inverted J-shaped portion from both ends of the conductor 13.
Are opened in a direction to pull out the conductor 13 from the magnetic core a11.

That is, when the conductor 13 is inserted into the magnetic core a11, the claw 14a and the concave portion 16 are fitted, and the conductor 13 is fixed to the magnetic core a11. Furthermore, two substantially U of the conductor 13
When the magnetic core b12 is inserted into the V-shaped portion, the claw 14b
5, the magnetic core b12 is fixed to the conductor 13.
As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, since fixing between the members is performed only by combining the constituent members, for example, the members are bonded. And the production can be further facilitated.

[0017]

Third Embodiment An impedance element according to a third embodiment of the present invention will be described below. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 7 is a diagram showing a configuration example of the third embodiment, showing an example of a state before assembly.

In FIG. 1, reference numeral 17 denotes a conductive film formed on the surface of the magnetic core b12, and reference numeral 18 denotes a conductive film formed on the surface of the magnetic core a11. The conductive film is formed by, for example, thick film printing or vapor deposition. In the present embodiment, the magnetic core b is added to the magnetic core a11.
12 is inserted, the conductor film 17 and the conductor film 18 are inserted.
Are electrically connected. That is, the conductor film 17 and the conductor film 18 in the present embodiment correspond to the conductor 1 in the first embodiment.
Equivalent to 3.

Since the conductor films 18a and 18c serve as electrodes to be connected to an external circuit, soldering or the like is performed before or after assembly in this embodiment to improve solderability. As described above, according to this embodiment, elements having different impedances can be easily obtained only by changing the magnetic core b12 to one having a different magnetic permeability.

[0020]

[Effects of the Invention] As described above, according to the present invention,
For example, since a bent copper plate or the like can be used as the conductor, an impedance element having a large allowable current using a conductor having a sufficient cross-sectional area can be easily provided, and the first core and the conductor make up. Regarding the plurality of second magnetic cores to be inserted into the plurality of recesses, cross-sectional shapes along the insertion direction are prepared in a substantially L-shaped and a substantially T-shaped, and the substantially T-shaped according to a desired impedance. By simply increasing or decreasing the number of used second magnetic cores, it is possible to cope with an element having an arbitrary impedance.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of an impedance element according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a completed state of the embodiment.

FIG. 3 is a diagram illustrating an example of a relationship between relative magnetic permeability and impedance of a magnetic core b according to the present embodiment.

FIG. 4 is a diagram showing another configuration example of the present embodiment.

FIG. 5 is a diagram showing another configuration example of the present embodiment.

FIG. 6 is a diagram showing a configuration example of a second embodiment according to the present invention;

FIG. 7 is a diagram showing a configuration example of a third embodiment according to the present invention.

FIG. 8 is a diagram showing a configuration example of a conventional chip-type impedance element.

[Explanation of symbols]

 11 core a12 core b13 conductor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01F 17/00 H01F 17/04 H01F 27/28

Claims (2)

(57) [Scope of request for utility model registration] 1. A first magnetic core, a plate-shaped conductor bent into a predetermined shape inserted into an opening of the first magnetic core, inserted into the first magnetic core, and inserted into the first magnetic core have a plurality of second magnetic core to be inserted into the plurality of recesses formed between the fitting and the said conductor, the cross-sectional shape along said second core each insertion direction substantially
L or substantially T-shaped der Rukoto impedance element characterized. 2. A first magnetic core having an opening, a concave portion on a side surface in the opening, and a plate-like shape which is inserted into the opening of the first magnetic core and bent into a predetermined shape. a conductor comprising a plurality of projections on the surface, is inserted into the first magnetic core and a plurality of recesses formed by conductors inserted into the opening of the first magnetic core, a plurality of a recess in the inserted site The second magnetic core has a cross-sectional shape substantially along the insertion direction of each of the second magnetic cores.
An impedance element having an L or substantially T shape, wherein the concave portions of the first and second magnetic cores and the plurality of convex portions of the conductor are fitted respectively.