JP2019021691A - Inductor - Google Patents

Abstract

To provide an inductor that can improve the degree of freedom of routing of a pattern of a board and arrangement of parts and keeps the rise of the part temperature lower.SOLUTION: There is provided an inductor in which a coil portion 1 is incorporated in a magnetic core 2. In the coil portion, an H-shaped conductor is constituted by a first conductor 1d, a second conductor 1e arranged in parallel to the first conductor, and a connecting conductor 1a connecting the first conductor and the second conductor. Both ends of the connecting conductor in the longitudinal direction are bent at a substantially right angle vertically downward at a position of a first predetermined length from the center and both ends of the first conductor and both ends of the second conductor are bent at a position of a second predetermined length at a substantially right angle to the outer side or the inner side and the first conductor and the second conductor is cut out from the lower end by a predetermined width between the two bending positions of the first conductor and between the two bending positions of the second conductor to form the gaps 1j and 1k.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inductor suitable for smoothing in a circuit of a power supply device.

  Patent documents 1 to 3 are known as conventional inductors. In the inductor disclosed in Patent Document 1, a rectangular conductor or a conductor has a smaller vertical / horizontal length ratio in the vertical direction and a larger horizontal direction in the vertical direction, and both ends in the length direction are vertically downward at a certain length from the center. The middle leg is bent 90 ° to the outside and bent 90 ° outward at a certain length, and an EE-shaped or EI-shaped magnetic core gap is provided inside the convex portion at the center. In this way, a set of outer legs of the E-shaped magnetic core are assembled on the outer side of the convex part so that they come from the outer side in the width direction of the conductor, and from the last bending position of the flat conductor or conductor to the tip of the mounting terminal This is a surface mount type inductor.

  In Patent Document 2, a rectangular wire is edgewise wound, and two drawer portions respectively extending from two winding end positions of the edgewise winding are arranged on a straight line passing through the winding center of the edgewise winding. A reactor drawn in the opposite direction of 180 degrees is described.

  The drawer portions respectively extending from the two winding end positions of the edgewise winding are easily pulled out by edgewise bending. Then, by making the angle formed by the two winding end positions different from the angle formed by the two drawing portions, the inductance value of the coil can be arbitrarily set without being limited to the drawing direction of the drawing portion.

  Patent Document 3 describes a method in which a reactor is connected to a substrate with a stud to secure a space with the substrate, and components are mounted in this space.

JP 2004-241454 A JP 2000-260623 A Japanese Patent Laid-Open No. 2004-63676

  However, in Patent Document 1, as shown in FIG. 8, since the area of the portion where the terminal 103 of the inductor is in contact with the substrate is large, component placement and pattern design are limited to the substrate layout.

  Even if the terminal 103 is used without being bent, the terminal 103 of the inductor limits the arrangement of components on the substrate 100 and the routing of the pattern as shown in FIG. That is, there is a problem that the pattern is difficult to draw. Reference numeral 121 denotes a chip resistor, 122 denotes a chip capacitor, 123 denotes an FET, and 124 and 125 denote ICs.

  Further, when the inductor has a shape as shown in FIG. 10, the four terminals 103 of the inductor obstruct the air flow necessary for cooling the component under the inductor, so that the component temperature is likely to rise. As shown in FIG. 11, the wind is difficult to flow. This makes it difficult to mount components on the bottom surface of the inductor.

  Furthermore, in the case where an inductor as shown in FIG. 10 is used and the voltage across the inductor 132 is detected by the detection circuit 131 shown in FIG. 12, it is necessary to wire a pattern from the place where the current of the inductor 132 flows. For this reason, depending on the arrangement of the detection circuit 131, there may be a case where the pattern routing becomes long. When the pattern becomes long, noise is generated and may interfere with other patterns.

  An object of the present invention is to provide an inductor that can improve the degree of freedom of the patterning of the substrate and the arrangement of the components, and can further suppress the rise in the component temperature.

  The inductor according to the present invention is an inductor in which a coil portion is incorporated in a magnetic core. The coil portion forms an H-shaped conductor by the first conductor, the second conductor arranged in parallel to the first conductor, and the connecting conductor that connects the first conductor and the second conductor. . Both ends of the connecting conductor in the length direction are bent substantially perpendicularly downward at a first predetermined length position from the center, and both ends of the first conductor and both ends of the second conductor are bent at a second predetermined length position. Bending outside or inside at a substantially right angle, and cutting the first conductor and the second conductor from the lower end to a predetermined width between the two bending positions of the first conductor and between the two bending positions of the second conductor. A gap is formed.

  According to the present invention, both ends of the connecting conductor in the length direction are bent substantially perpendicularly downward at a first predetermined length from the center, and both ends of the first conductor and the second conductor are connected to each other. (2) The first conductor and the second conductor are bent at right angles outward or inward at a predetermined length, and between the two bending positions of the first conductor and between the two bending positions of the second conductor. A notch with a predetermined width was formed from the lower end.

  That is, a bending process is added to the terminal of the inductor and a gap in which a pattern or a part can be placed is added under the terminal, so that another part can be placed in the gap. Accordingly, it is possible to improve the degree of freedom of the patterning of the substrate and the component arrangement. Further, since the wind easily flows on the lower surface of the inductor, the rise in the component temperature can be further suppressed.

It is a block diagram of the inductor which concerns on Example 1 of this invention. It is a perspective view which shows the state which mounted the coil part which concerns on Example 1 on the core. It is the side view and bottom view of a coil part which concern on Example 1. FIG. FIG. 2 is a component layout diagram when the inductor shown in FIG. 1 is used. FIG. 6 is a component arrangement diagram when using a modification of the inductor according to the first embodiment of the present invention. It is a block diagram of the principal part of the inductor which concerns on Example 2 of this invention. It is a block diagram of the principal part of the inductor which concerns on Example 3 of this invention. It is a perspective view of an example of the conventional inductor. FIG. 10 is a component layout diagram when the inductor is used without bending the terminals of the inductor shown in FIG. 9. It is a perspective view of the other example of the conventional inductor. FIG. 11 is a component arrangement diagram when the inductor shown in FIG. 10 is used. It is a figure which shows the voltage detection circuit which detects the terminal voltage of an inductor.

  Hereinafter, an inductor according to an embodiment of the present invention will be described in detail with reference to the drawings.

Example 1
FIG. 1 is a configuration diagram of an inductor according to Example 1 of the present invention. 1A and 1B are perspective views of a coil portion. FIG.1 (c) is a figure which shows the state which incorporated the coil part in the magnetic body core.

  FIG. 2A is a perspective view showing a state in which the coil portion according to the first embodiment is incorporated in one magnetic core, and FIG. 2B shows a state in which the coil portion is incorporated in two magnetic cores. It is a perspective view. 3A and 3C are bottom views of the coil portion according to the first embodiment, and FIG. 3B is a side view of the coil portion according to the first embodiment.

  The inductor according to Example 1 shown in FIG. 1 is an inductor in which a coil portion 1 is incorporated in a magnetic core 2.

  The coil portion 1 is made of copper, phosphor bronze, or the like, and as shown in FIGS. 1 (a) and 1 (b), an elongated rectangular first conductor 1d and an elongated rectangular first conductor disposed parallel to the first conductor 1d. The two conductors 1e, the first conductor 1d, and the connecting conductor 1a that connects the second conductor 1e constitute an H-shaped conductor.

  Connection conductor bent portions 1b and 1c are formed by bending both ends in the length direction of the connection conductor 1a at a first predetermined length from the center vertically downward at a substantially right angle.

  A terminal 1f is formed by bending one end of the first conductor 1d to the inside at a second predetermined length position at a substantially right angle, and the other end of the first conductor 1d is bent to a substantially right angle at the second predetermined length position. Terminal 1h is formed.

  A terminal 1g is formed by bending one end of the second conductor 1e inward at a second predetermined length at a substantially right angle, and the other end of the second conductor 1e is bent at a substantially right angle at the second predetermined length. Terminal 1i is formed.

  Between the two bending positions of the first conductor 1d, that is, in the first conductor 1d, the first conductor 1d excluding the terminals 1f and 1h is notched from the lower end by a predetermined width, and the notch 1j Is formed. That is, a gap is formed.

  Between the two bending positions of the second conductor 1e, that is, in the second conductor 1e, the second conductor 1e excluding the terminal 1g and the terminal 1i is cut out by a predetermined width from the lower end, and the notch 1k. Is formed. That is, a gap is formed.

  As shown in FIG. 1C, the magnetic core 2 includes an E-shaped first core 2a and an E-shaped second core 2b. The 1st core 2a and the 2nd core 2b consist of cono-legs and a center leg.

  The cono-legs of the first core 2a are arranged on the terminals 1f, 1g of the coil part 1, the cono-legs of the second core 2b are arranged on the terminals 1h, 1i of the coil part 1, and the cono-legs of the first core 2a The character legs and the cono-legs of the second core 2b are arranged to face each other with a predetermined gap, and are arranged so as to surround the connection conductor 1a and the connection conductor bent portions 1b and 1c.

  The center leg of the first core 2a is inserted between the terminal 1f and the terminal 1g of the coil part 1, and the center leg of the second core 2b is arranged between the terminal 1h and the terminal 1i of the coil part 1. Then, the central leg of the first core 2a and the central leg of the second core 2b are arranged to face each other with a predetermined gap.

  As described above, according to the inductor of the first embodiment, both ends of the connecting conductor 1a in the length direction are bent substantially perpendicularly downward at a position of the first predetermined length from the center at a substantially right angle, thereby connecting conductor bending portions 1b and 1c. And bent one end of the first conductor 1d and one end of the second conductor 1e inward at a second predetermined length inward at a substantially right angle to form terminals 1f and 1g. The other end and the other end of the second conductor 1e are bent outward at a second predetermined length at a substantially right angle to form terminals 1h and 1i.

  A notch 1j in which the first conductor 1d and the second conductor 1e are cut out from the lower end by a predetermined width between the two bending positions of the first conductor 1d and between the two bending positions of the second conductor 1e; 1k, that is, a gap was formed.

  In other words, bending is added to the inductor terminals, and gaps (notches 1j, 1k) in which patterns and parts can be placed are added under the terminals, so other parts are placed in the gaps (notches 1j, 1k). it can. Accordingly, it is possible to improve the degree of freedom of the patterning of the substrate and the component arrangement. Further, since the wind easily flows on the lower surface of the inductor, the rise in the component temperature can be further suppressed.

  FIG. 4 shows the substrate layout when the inductor shown in FIG. 1 is used. As shown in FIG. 4, the terminals 1f to 1i of the inductor are disposed on the laterally elongated patterns 12a to 12d of the substrate 11, and the terminals 1f to 1i are soldered to the patterns 12a to 12d. As can be seen from FIG. 4, patterns and components can be arranged without being restricted by the terminals 1f to 1i of the inductor.

  Further, when detecting the terminal voltage of the inductor, the voltage can be detected by the terminal 1f and the terminal 1g, and the voltage can be detected by the terminal 1h and the terminal 1i. For this reason, the freedom degree of arrangement | positioning of a substrate pattern is improving.

  FIG. 5 is a component layout diagram when a modification of the inductor according to the first embodiment of the present invention is used. In the inductor according to the first embodiment shown in FIG. 1, the terminals 1f and 1g are bent inward, but the modification shown in FIG. 5 is a terminal 1m of the first conductor 1d and a terminal 1n of the second conductor 1e. And are bent outward.

  As shown in FIG. 5, since the terminal 1m of the first conductor 1d and the terminal 1n of the second conductor 1e are bent outward, the gap between the first conductor 1d and the second conductor 1e is wide. Become. For this reason, since the air flow under the inductor is improved, the component temperature can be further lowered.

(Example 2)
FIG. 6 is a configuration diagram of the main part of the inductor according to the second embodiment of the present invention. The inductor according to the second embodiment shown in FIG. 6 has a terminal 1o in which the other end of the first conductor 1d is bent at a second predetermined length inward at a substantially right angle with respect to the terminal of the coil portion 1 shown in FIG. Is forming.

  The effect similar to the effect of the inductor of the first embodiment can also be obtained by the inductor according to the second embodiment.

(Example 3)
FIG. 7 is a configuration diagram of the main part of the inductor according to the third embodiment of the present invention. In the inductor according to the third embodiment shown in FIG. 7, the terminal 1p is bent by bending one end of the first conductor 1d outward at a second predetermined length to the terminal of the coil portion 1 shown in FIG. Forming.

  The same effect as that of the inductor of the first embodiment can be obtained by the inductor according to the third embodiment.

  In addition, this invention is not limited to the coil part 1 of Example 1-3, The both ends of the 1st conductor 1d and the both ends of the 2nd conductor 1e are outside or inside in the position of 2nd predetermined length. The terminal may be formed by bending at a substantially right angle.

DESCRIPTION OF SYMBOLS 1 Coil part 1a Connection conductor 1b, 1c Connection conductor bending part 1d 1st conductor 1e 2nd conductor
1f to 1i, 1m, 1n Terminal 1j, 1k Notch (gap)
2a 1st core 2b 2nd core 11 Board | substrates 12a-12d Board | substrate pattern 103 Terminal

Claims (4)

An inductor having a coil portion incorporated in a magnetic core,
The coil portion forms an H-shaped conductor by a first conductor, a second conductor arranged in parallel with the first conductor, and a connecting conductor that connects the first conductor and the second conductor. Then, both ends of the connecting conductor in the length direction are bent substantially perpendicularly downward at a first predetermined length from the center so that both ends of the first conductor and both ends of the second conductor are second The first conductor and the second conductor are bent at right angles outward or inward at a predetermined length and between the two bending positions of the first conductor and between the two bending positions of the second conductor. An inductor having a gap formed by cutting a predetermined width from a lower end of a conductor.   One end of the first conductor and one end of the second conductor are bent substantially inward at a second predetermined length, and the other end of the first conductor and the other end of the second conductor are The inductor according to claim 1, wherein the inductor is bent outward at a substantially right angle at a position of the second predetermined length.   2. The inductor according to claim 1, wherein both ends of the first conductor and both ends of the second conductor are bent substantially at right angles to the outside at a position having a second predetermined length.   The magnetic body core includes an E-shaped first core and an E-shaped second core, and the first core and the second core are disposed so as to surround the connection conductor. The inductor according to any one of claims 1 to 3.

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