JPS61133609A - Inductor - Google Patents

Abstract

PURPOSE:To facilitate coil terminal processing work by composing through winding a coil in succession on plural coil winding portions where a core is sectioned in the coil winding axis direction. CONSTITUTION:In plural coil winding portions 91 sectioned in a coil winding axis direction 0, a terminal 11 is formed to connected the above-mentioned core 9 with a coil terminal 101 of a coil 10 formed with the core 9. When delay lines and various kinds of filters are composed, the coil terminal processing work of inductors being very easy, they are easy to assemble and manufacture, rich in mass productivity, and they will be small in size, small in waveform distortion, and good in frequency characteristics when realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an inductor having a plurality of coils and used, for example, to construct various filters or delay lines.

2. Description of the Related Art A delay line as shown in FIG. 5 or 6 has been known for use in timing adjustment of computers, various control equipment, demodulation circuits, oscillation circuits, radar position detection, and color televisions. First, the delay line shown in FIG. 5 has a circuit configuration in which inductors L1 to Ln are connected in series and capacitors 01 to Cn are connected to their respective connection points. Next, the delay line shown in FIG. 6 is called an induction M type, and an intermediate tap is provided for each of the inductors L1 to Ln, and capacitors 01 to 01 to Ln are provided to each of the inductors L1 to Ln.
This is a circuit in which Cn is connected.

In order to obtain the above-mentioned delay line, conventionally, as shown in FIG. 7, a plurality of wire-wound inductors 4 are used, which are constructed by winding a coil 2 around a drum-shaped core l made of ferrite or the like. , these inductors 4 are connected to the circuit board 3
The capacitors 5 are arranged at intervals on one surface of the circuit board 3, and a plurality of capacitors 5 constituting a delay circuit together with the inductor 4 are arranged on the other surface of the circuit board 3.

Note that the winding structure shown in Japanese Utility Model Publication No. 1557/1983 is applied to the winding coupling of the inductor when obtaining the above-mentioned delay line.

Problems to be Solved by the Invention As mentioned above, in the past, individually wound type inductors 4 were used, so the coil terminals of each inductor 4 were routed on the printed circuit board 3 and the capacitor 5 For example, when configuring an induction M-type delay line, as shown in FIG. As shown in FIGS. 9 and 10, the inductor 4 is mounted on one side of the circuit board 3, and the coil terminal 203, which becomes the capacitor connection tap, is connected from the side where the inductor 4 is placed. It is necessary to pass through the lower edge of the circuit board 3 and draw it out to the other side where the capacitor 5 is arranged, and to tie it around the lead terminal 6 attached to the edge of the printed circuit board 3 and fix it by soldering. In addition, a coil terminal 201 serves as a connection terminal between the inductors.
, 202 also need to be tied together and soldered. Note that 7 in FIG. 9 is a conductor pattern.

Therefore, when creating a delay line etc. using a conventional wire-wound inductor, the coil terminal 2 of each inductor 4
01 to 203 lead soldering is very troublesome work, lacks mass productivity, and has the problem of high cost.

Moreover, since the wire diameter of the coil 2 constituting the inductor 4 is very small, there are problems such as wire breakage occurring during the routing and soldering of the coil terminals 201 to 203.

Furthermore, it is necessary to use a plurality of inductors 4 each having a coil 2 attached to an independent drum-shaped core l, and to arrange these on the printed circuit board 3, etc., which increases the overall size and allows for high-density packaging. This will be disadvantageous when trying to

In place of the wire-wound inductor, a chip inductor has been proposed, but it has the disadvantage that it is inferior to the wire-wound inductor in terms of frequency characteristics, waveform distortion adjustment, and the like.

The above-mentioned drawbacks occur not only when configuring a delay line but also when configuring something that requires a plurality of inductors, for example, when configuring various filters.

Therefore, the present invention solves the above-mentioned problems, and provides a coil with very easy terminal processing, excellent assembly and manufacturing workability, mass productivity, small size, low waveform distortion, and excellent frequency characteristics. The technical challenge is to provide an inductor that can realize various applications.

Means for Solving the Problems - In order to solve the problems described in F, the present invention provides a core in which a coil is continuously wound around a plurality of coil winding portions partitioned in the direction of the coil winding axis; It is characterized by having a terminal formed in the core and connecting the coil terminals of the coil.

As described above, in the present invention, a core in which a coil is continuously wound in a plurality of coil winding parts divided in the direction of the coil winding axis is used, so unlike the conventional case, individual drum-shaped cores are used. There is no need to wind the wire, making the winding work much easier.

Furthermore, since the terminals for connecting the coil terminals of the coils are formed in the core, the coil terminals can be processed on the inductor itself, making it unnecessary to route the coil terminals. Therefore, coil terminal processing becomes extremely simple, and accidents such as disconnection of coil terminals are prevented, improving reliability.
View.

Moreover, even with the above-described structure, it is possible to obtain characteristics comparable to those using conventional wire-wound drum cores in terms of frequency characteristics and waveform distortion.

Furthermore, since cores that were conventionally independent from each other are integrated, high-density packaging is possible, and delay lines and filters can be miniaturized.

Embodiments FIGS. 1 to 3 are perspective views of each embodiment of an inductor according to the present invention.

First, in the embodiment shown in FIG. 1, 9 is the direction O of the coil winding axis.
This is a core in which a coil IO is continuously wound around a plurality of coil winding portions 91 partitioned along. The core 9 may be formed of ferrite, but is preferably formed of a composite resin ferrite that is a mixture of ferrite powder and synthetic resin.When the core 9 is formed of a composite resin ferrite, it is compared to the case of using ferrite. This is because the frequency characteristics and waveform distortion do not become so bad, and the advantage is that it has excellent moldability and is convenient for forming terminals as described below.

When winding the coil 10 around the core 9, a wooden wire is used and the wire is continuously wound from one coil winding part 91 to the next coil winding part 91.

Therefore, since a plurality of inductors can be formed on one core 9, the coil winding work is much simpler than the conventional case where winding is performed on each individual drum-shaped core. Furthermore, since the cores that were independent of each other are integrated, it is possible to reduce the size and high-density packaging, and the delay line and filter can be made smaller.

The coil winding portions 91 of the core 10 are separated from each other by a collar portion 92 provided therebetween. In this embodiment, the coil winding part 91 is formed to have a circular cross section, and the flange part 92
is formed to have a rectangular cross-section larger than the outer shape of the coil winding portion 91.

11 is formed directly on the core 9 and is the coil terminal 1 of the coil IO.
This is the terminal to which 01 is connected. In this embodiment, a metal bottle-shaped terminal 11 is used and is directly implanted in the flange 92 of the core 9. Since the core 9 made of ferrite or composite resin ferrite has high electrical insulation, such a terminal mounting structure can be adopted. When the core 9 is made of composite resin ferrite, the terminals 11 can be implanted at the same time as the core 9 is molded by means such as injection molding, or after the core 9 is molded, the terminals 11 The terminal 11 can be attached by driving the terminal 11 into the terminal 11, making it easier to attach the terminal 11, and increasing the strength of the terminal 11 that will be attached later.

With the terminal 11 as described above, one wire is used to wind the coil 10 around the core 9, and the coil 10 is wound continuously from one coil winding part 91 to the next coil winding part 91. To tap out the coil terminal 101, it is sufficient to simply connect the coil terminal 101 to the terminal 11. Therefore, it becomes possible to process the coil terminal 101 on the inductor itself, and there is no need to route the coil terminal 101. Therefore, the coil terminal processing becomes very simple, and the coil terminal 10
The disconnection accidents mentioned in 1 are also prevented and reliability is improved.

Furthermore, when configuring a delay line, filter, etc., the terminal 11 is connected to the printed circuit board 3 as shown in FIG.
It is possible to solder the conductive pattern 7 to the conductive pattern 7 and make it conductive to other circuit components such as a capacitor through the conductive pattern 7. Therefore, when connecting to other parts such as a capacitor, there is no need to route the coil terminal 101, and disconnection accidents are prevented.

Next, the embodiment of FIG. 2 shows an inductor suitable for constructing the inductive M-type delay line of FIG. The coil lO in each coil winding part 91 is first wound around the terminal 11 by the intermediate tap 102, then wound again around its own coil winding part 91, and then guided to the adjacent coil winding part 91. and wind it. Furthermore, in this embodiment, a groove 93 is formed approximately in the middle of the surface of the flange 92 on which the terminal 11 is formed. With such a groove 93, it is possible to guide the coil terminal 101 of the coil 10 wound around one coil winding part 91 to the adjacent coil winding part 91 through this groove 93. Therefore, even when the coil terminal 101 is mounted on the printed circuit board 3 as shown in FIG. 4, the coil terminal 101 does not get in the way.

Also, the flange 93 can be used as a standoff, and the terminal ll
There is also an advantage that solder wicking phenomenon can be prevented when soldering to the conductor pattern 7 of the printed circuit board 3.

Next, in the embodiment shown in FIG. 3, the terminal 11, which was shaped like a bottle in the embodiments shown in FIGS. 1 and 2, is bent outward. Although not shown in the drawings, the structure of the terminal 11 can take various forms in addition to the above embodiments. For example, there is a structure in which the terminal 11 is fitted to the core 9, or a protrusion is provided on the core 9 and a conductor pattern is formed on the surface thereof, and this is used as the terminal 11.

Effects of the Invention As described above, the present invention provides a core in which a coil is continuously wound around a plurality of coil winding portions partitioned in the direction of the coil winding axis, and a coil formed on the core. Because it has a terminal for connecting terminals, it is very easy to process the coil terminals of the inductor when configuring delay lines and various filters, and it is easy to assemble and manufacture, and is suitable for mass production. Therefore, it is possible to provide an inductor that is small, has low waveform distortion, and has excellent frequency characteristics.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an inductor according to the present invention, FIG. 2 is a perspective view of another embodiment, FIG. 3 is a perspective view of still another embodiment, and FIG. 4 is a perspective view of an inductor according to the present invention. Figure 5 is an electrical equivalent circuit diagram of the delay line, Figure 6 is an electrical equivalent circuit diagram of an inductive M-type delay line, and Figure 7 is an electrical equivalent circuit diagram of a conventional delay line. 8 is a perspective view of a conventional inductor, FIG. 9 is an enlarged sectional view of the main part of a delay line using a conventional inductor, and FIG. 10 is an enlarged plan view thereof. . 9... Core lO... Coil 11... Terminal Figure 7 Figure 8 Figure 9

Claims (6)

[Claims] (1) It is characterized by having a core in which a coil is continuously wound around a plurality of coil winding portions partitioned in the direction of the coil winding axis, and a terminal formed on this core to connect the coil ends of the coil. inductor. (2) The inductor according to claim 1, wherein the core is made of composite resin ferrite. (3) The inductor according to claim 1, wherein the core is made of ferrite. (4) The inductor according to claim 2 or 3, wherein the terminal is implanted in the core. (5) The inductor according to claim 1, 2, 3, or 4, wherein the terminal is formed on the same side of the core. (6) The coil-wound portion of the core is divided by a flange, and the terminal is formed in the flange. The inductor according to item 4 or 5.