JPH03191503A - Inductance element - Google Patents

Abstract

PURPOSE:To obtain a multifunction inductance element which can be used as an element of different sorts such as a transformer or a choke coil by forming a principal coil member consisting of a ferrite ring magnetic substance core and a plurality of coil formation leads, also serving as terminals, adhered thereto. CONSTITUTION:A principal coil member is made by adhering and fixing coil formation leads 2a also serving as terminals 2b to a ferrite ring 1. In this time, an inductance element comprises a coil and magnetic core, which is made by connecting the principal coil member to a print pattern formed beforehand on a substrate in series through the terminals 2b and forming a winding around the ferrite ring 1. The inductance element is connected to the printed circuit board of a real apparatus with coil terminal patterns 4a and 4b and functions as a choke coil or an inductor. Thereby the element can directly be packaged as inductance elements of different numbers of windings and sorts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inductance element, and particularly to an inductance element that is mounted on a printed circuit board to realize an inductor, transformer, choke coil, or the like.

[Prior Art] Conventionally, inductance elements of this type are related to the inductance element shown in FIGS.
No. 9 discloses a hybrid integrated circuit.

FIG. 6 is a perspective view showing the structure of a conventional inductance element disclosed in this document, and FIG. 7 is a side sectional view. In each figure, (1) is a ferrite ring that constitutes a magnetic core, (3) is an adhesive, (5) is a lead for forming a coil,
(6) is a through hole, () is a printed circuit board, (8) is solder, and (9) is a conductive land.

The conventional inductance element described above is made by winding the lead (5) around the ferrite ring (1) as many times as necessary to form the necessary element such as a transformer or choke coil, and then attaching it to the base printed circuit board ( 7) and glue (3)
) and connect the lead (5) with the conductor land (9).
They were connected to each other by solder (8) to form an inductance element.

In this way, the inductance element attached to the printed circuit board (7) can be formed as one component. When mounting, the printed circuit board (7) is placed on the printed circuit board of the target actual device (not shown) and connected via conductor lands (9).

[Problem to be solved by the invention] In the conventional inductance element as described above, a lead is wound around a ferrite ring to form a necessary element such as a transformer or a choke coil, which is then fixed to a printed circuit board and a terminal is attached. They formed one part. Therefore, when forming the element, it was necessary to wind each core, and furthermore, it was necessary to attach the element to a printed circuit board with terminals. Furthermore, since the winding method differs depending on the type of element required, there are problems such as the need to prepare different types of inductance elements for different purposes.

This invention was made to solve the above-mentioned problems, and there is no need to wind the wire, and there is no need to attach it to a printed circuit board with terminals. The object of the present invention is to obtain an inductance element that can be mounted on a substrate and has multifunctionality, allowing one type of element to be used as different types of elements such as transformers and choke coils.

[Means for Solving the Problem] The inductance element according to the present invention has a main coil member formed by bonding a plurality of leads for coil formation, which also serve as terminals, to a magnetic core of a ferrite ring, for example. The member is connected via the terminal to a substrate having a printed pattern for forming a coil, thereby forming at least one recoil containing a magnetic core.

[Function] In this invention, the inductance element is constructed by connecting the main coil member, which is formed by bonding a coil forming lead that also serves as a terminal to a ferrite ring, to the printed pattern on the board, so that the winding can be easily connected. There is no need to apply it, and there is no need to fix it to a printed circuit board with terminals for installation.
It can be directly mounted on the printed circuit board of the target actual device, and by changing the pattern of the printed circuit board, the lead wire formed on one type of element can be selected to connect to a different type of element such as a transformer or choke coil. A coil having the number of turns depending on the element can be formed and used as necessary.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
5 to 5 are schematic diagrams each showing the structure of an inductance element in this embodiment.

Fig. 1 is a perspective view showing the main coil members described above, Fig. 2 is a side sectional view of the main coil members, and Figs. 3 and 4 are obtained by connecting the main coil members to a substrate having a printed pattern. FIG. 5 is a top view showing one embodiment of the method of using the inductance element, and FIG. 5 is a top view showing another embodiment. In each figure, (1) is a ferrite ring used as a magnetic core, (2a) is a lead for forming a coil, (2b) is a terminal,
(3) is an adhesive, (4) is a printed pattern formed on the substrate side, and (4a).

(4b), (4c), and (4d) show coil terminal patterns.

In the embodiments shown in FIGS. 1, 2, and 3, an inductance element having a single core-containing coil is shown. First, as shown in Figures 1 and 2, the ferrite ring (1) is connected to a coil forming lead (2b) that also serves as a terminal (2b).
2a) is adhesively fixed to form the main coil member.

In this case, as shown in the figure, the coil forming portions of the plurality of coil forming leads (2a) are bonded with adhesive (3) so as to straddle the ferrite ring (1) in the same direction at approximately equal intervals. It is fixed. Therefore, the terminal (2b) protrudes below the ferrite ring (1).

As shown in Fig. 3, the inductance element is constructed by sequentially connecting the main coil components formed as described above to the printed pattern 4 previously formed on the board in series via each terminal (2b) to form a ferrite ring (+,). It consists of a recoil with a magnetic core in which a winding is formed. This inductance element has a coil terminal pattern (4
a) and (4b) are connected to a printed circuit board of an actual device (not shown), in this case functioning as a choke coil or an inductor.

The inductance element shown in the embodiment of FIG. 4 has a coil terminal pattern (4a) on one ferrite ring (1),
Two thick recoils having magnetic cores (4b), (4c), and (4d) are formed. In this configuration, for example, the coils of the coil terminal patterns (4a) and (4b) are used as the primary coils, and the coils of the coil terminal patterns (4c) and (4d
) as a secondary coil. Similarly, it is also easy to form three or more thick core coils in one magnetic core, if necessary.

Fig. 5 shows the main components of a coil according to another embodiment, in which coil forming leads (2a) are attached to each side of a square ferrite ring (1) so that one coil can be formed. This is what was installed. With such a structure, it is possible to configure an inductance element having a plurality of coils with magnetic cores in the same magnetic core depending on the purpose.

As described above, in the inductance element according to the present invention, a coil forming lead is bonded to a ferrite ring to form the main coil component, and this is connected to a printed pattern formed on a substrate, so there is no need for winding as in the conventional method. There is no. Furthermore, since the coil-forming leads also serve as terminals, there is no need for a printed circuit board as a base. Furthermore, Figure 3,
As shown in Figure 4, by changing the pattern of the printed circuit board on which this element is mounted, the choke coil,
Various inductance elements such as common mode chokes and transformers can be realized, and the number of turns of the coil can be varied by selecting the number of bins used.

Note that although circular or square ferrite rings are used in the embodiments described above, the ferrite rings may have any shape depending on the purpose.

[Effects of the Invention] As described above, according to the present invention, an inductance element is formed by bonding a coil forming lead that also serves as a terminal to a ferrite ring and connecting this to a substrate having a printed pattern, thereby eliminating the need for complicated operations. By changing the pattern of the printed circuit board on which it is mounted, one type of element can be directly mounted as an inductance element with a different number of turns and type, which simplifies the manufacturing process and reduces costs. This has the effect of reducing the amount of water and improving usability.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing the main coil components of an inductance element according to an embodiment of the present invention, Fig. 2 is a side sectional view thereof, and Fig. 3 is a schematic top view of an inductance element showing an embodiment of the invention. , FIG. 4 is a top view of an inductance element showing another embodiment of this invention, FIG. 5 is a top view of the main components of a coil showing another embodiment of this invention, and FIG. 6 is a configuration of a conventional inductance element. FIG. 7 is a side view thereof. In the figure, (1) is a ferrite ring, (2a) is a coil forming lead, (2b) is a terminal, (3) is an adhesive,
(4) is a printed pattern, (4a), (4b), (4c), (4d) is a coil terminal pattern, (5) is a lead, (6) is a through hole, (7) is a printed circuit board,
(8) is solder, and (9) is a conductor land. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] Consisting of a main coil member consisting of a substrate having a printed pattern, a magnetic core, and a coil-forming lead, the coil-forming portion of the coil-forming lead, whose both ends also serve as terminals, is connected to the magnetic core. An inductance element characterized in that the main coil member formed by adhesion is connected to the printed pattern of the substrate via the terminal to form at least one coil containing a magnetic core.