JPH02230705A - Inductor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Use] This invention relates to an inductor used particularly as a device for EMC (noise) countermeasures.

[Conventional technology]

Conventionally, as this type of noise countermeasure inductor, for example, a bead 1 made of ferrite or the like as shown in FIG.
There is one in which a lead wire is inserted into a through hole 2 provided in the lead wire.

Fig. 11 shows the state in which the lead wires are passed through. Fig. 11 (a) is an axial type in which both sides of the lead wire 3 extend in a straight line, and Fig. 11 (b) shows the state in which one side of the lead wire 3 is extended in a straight line. Each figure shows a vertical type bent in the opposite direction. Further, FIG. 12 shows a composite type inductor using two beads 1.

Each inductor configured as described above is inserted in series in, for example, an electronic circuit on a printed circuit board, thereby absorbing noise superimposed on the circuit and protecting the circuit from the influence of the noise. 13 shows the equivalent circuit of the inductor shown in FIG. 11, and FIG. 14 shows the equivalent circuit of the inductor shown in FIG. 12. 3a and 3b are the lead wires 3
shows the end of the

(Problem to be solved by the invention) Since the conventional inductor is configured as described above,
For example, when it is necessary to mount a large number of elements, such as when inserting them into a signal bus line of an electronic circuit, there are problems in that the mounting space becomes large, the number of mounting steps increases, and the device becomes expensive.

The present invention has been made to solve the above-mentioned problems, and aims to provide an inexpensive inductor that requires less mounting space and fewer man-hours even when a large number of inductors are mounted.

(Means for Solving the Problems) An inductor according to the present invention is configured such that a plurality of grooves penetrating the magnetic plate are provided in a plate-like magnetic plate, and a lead wire is passed through these grooves. be·.

[Effect]

In the inductor of the present invention, a plurality of inductors can be integrated by passing lead wires through each groove provided in the magnetic plate.

〔Example〕

FIG. 1 is an exploded perspective view showing the structure of an inductor according to a first embodiment of the present invention. In the figure, 4a and 4b are two magnetic plates made of magnetic sintered body, magnetic compound, ferrite, etc., and one magnetic plate 4b is provided with a plurality of grooves 5 passing through the magnetic plate 4b. These grooves 5 become through holes when the two magnetic plates 4a and 4b are combined. Moreover, 3 is a lead wire passed through each groove 5.

The two magnetic plates 4a. 4b is one magnetic plate 4b
After the lead wires 3 are inserted into the respective grooves 5, they are integrally molded as shown in FIG. As a result, the integrated magnetic plate 4
A plurality of inductors are formed, each of which has a Riet wire 3 passed through it. Each of these inductors is interposed in an electronic circuit on a printed circuit board, and removes noise superimposed on the circuit. At this time, the equivalent circuit of each Riet wire 3 becomes as shown in FIG. 13, and the whole is used as an integrated circuit of a plurality of inductors. This is the conventional first
This is equivalent to the configuration in which a plurality of beads 1 are arranged in parallel as shown in FIG. Therefore, the mounting space on a printed circuit board or the like is reduced, and the number of man-hours required for mounting is also reduced.

Although the lead wire 3 has a straight shape in FIG. 2, it may have a U-shape as shown in FIG.

FIG. 4 is an exploded perspective view showing a second embodiment of the invention. This embodiment consists of three magnetic plates 4a, 4b, 4b and U.
It is a combination of lead wires 3 in the shape of a letter, and a plurality of holes into which the lead wires 3 are inserted in the direction of the arrow are provided inside the magnetic plates 4b, 4b on both sides. Figure 5 shows the state in which three magnetic plates 4a, 4b, 4b are integrally molded.
With this structure, the equivalent circuit of each lead wire 3 becomes as shown in FIG. 14, which is equivalent to the conventional structure using two beads 1 shown in FIG. 12.

6 and 7 are perspective views showing a third embodiment and a fourth embodiment of the present invention. The third embodiment shown in FIG. 6 shows a zigzag in-line (ZIL) method in which the ends 3a and 3b of each lead wire 3 are zigzag, and the fourth embodiment shown in FIG.
A parallel method is shown in which the ends 3a and 3b of each lead wire 3 are made parallel. All of these embodiments are similar to the above-mentioned first embodiment. The same effects as in the second embodiment are achieved.

Further, FIG. 8 shows a fifth embodiment of the present invention. This embodiment is a combination of a printed circuit board 6 on which lead wires 3 are printed and a magnetic plate 4b provided with 5's, and the pitch of 5's is provided in accordance with the pattern of the leads and lil3.

FIG. 9 is a sectional view showing the main part thereof, and even with such a configuration, the same effects as those of the above embodiments can be achieved.

In each of the above embodiments, the shape of the groove 5 is a square, but the shape of the groove 5 may be other shapes. Further, instead of a configuration in which a plurality of magnetic plates 4a and 4b are combined, a configuration in which an integrated magnetic plate 4 is provided with grooves 5 serving as n through holes may be used.

(Effects of the Invention) As described above, according to the present invention, a plurality of grooves are provided in the magnetic plate and the lead wires are passed through these grooves, so even when a large number of inductors are mounted, the mounting space is small. This has the effect of reducing the number of installation steps and making it cheaper.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the first embodiment of this invention, and the second
The figure is a perspective view showing the state after the inductor shown in Fig. 1 is assembled, Fig. 3 is a perspective view showing the case where the lead wire shown in Fig. 1 is formed into a U-shape, and Fig. 4 is a second embodiment of the present invention. FIG. 5 is an exploded perspective view showing the state of the inductor shown in FIG. 4 after combination. FIG. 6 is a perspective view showing the third embodiment of the present invention. FIG. 8 is an exploded perspective view showing a fifth embodiment of the present invention; FIG. 9 is a sectional view showing the main part of FIG. 8; FIG. 10 is a diagram used in a conventional inductor. Perspective view showing the shape of the bead, 1st
1(a) and (b) are perspective views showing a conventional inductor using the beads shown in FIG. 10, FIG. 12 is a perspective view showing a conventional inductor using two beads shown in FIG.
Figure 3 is an equivalent circuit diagram of the inductor shown in Figure 11, and Figure 14 is an equivalent circuit diagram of the inductor shown in Figure 12. In addition, 5... Groove 6 -------- Printed circuit board

Claims (1)

[Claims] An inductor characterized in that a plurality of grooves penetrating the magnetic plate are provided in a plate-like magnetic plate, and lead wires are passed through these grooves.