JP2017152548A - Inductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductor using an I type coil which can reduce the number of parts and can be easily manufactured.SOLUTION: The inductor includes: an I type coil 1 made of a metal plate; a rectangular cylindrical resin part 2 into which the coil 1 is inserted; and a core 9 arranged on the outer periphery of the resin part 2. The resin part 2 is formed with a groove 5a in a U-shape so that an engaging piece 5 deformable by elasticity in an out-of-plane direction is formed, a convex part 6 is formed on the inner surface of the engaging piece 5, and, in the coil 1, a concave portion 8 with which the convex portion 6 is engaged is formed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an inductor in which a core is disposed on the outer periphery of a rectangular tube-shaped resin component into which an I-type coil is inserted.

  Conventionally, as a kind of inductor, an outer periphery of a coil 20 made of an I-shaped copper plate, as shown in FIGS. In addition, a resin component 21 whose outer periphery is surrounded by a pair of U-shaped cores 22 is known.

  In the inductor having the above-described configuration, an adhesive is usually applied to the outer peripheral portion of the coil 20 inserted into the resin component 21, and the portion is inserted into the U-shaped portion of the resin component 21 and fixed. The core 22 is fixed by applying an adhesive to the outer peripheral surface 21 b of the component 21, and the tape 23 is wound around the outer periphery of the core 22 to be integrated.

  Thus, in the conventional inductor, since two resin parts 21 are required, the number of parts increases, and between the coil 20 and the resin part 21 and between the resin part 21 and the core 22. It took a lot of work to bond, and there was a problem that the manufacturing cost increased.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inductor using an I-type coil that reduces the number of parts and is easy to manufacture.

  In order to solve the above problems, an inductor according to the present invention described in claim 1 includes an I-type coil made of a metal plate, a rectangular tubular resin part into which the coil is inserted, and an outer periphery of the resin part. The resin component is formed with a U-shaped groove portion to form a locking piece that is elastically deformable in an out-of-plane direction, and a convex portion is formed on the inner surface of the locking piece. In addition to being formed, the coil has a concave portion with which the convex portion is engaged.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the convex portion is formed to have a height dimension larger than a gap between the resin component and the core. It is what.

  In the inductor according to claim 1 or 2, when the I-type coil is inserted into the rectangular cylindrical resin part at the time of assembling, the locking piece of the resin part is caused by the convex part that contacts the outer surface of the I-type coil. The I-shaped coil is inserted in a state of being deformed outward, and the convex portion engages with a concave portion formed in the I-shaped coil at a predetermined location.

  As described above, according to the inductor, the number of resin parts can be reduced as compared with the conventional case, and the I-type coil can be fixed in the resin part by the snap-fit structure. Assembling work of the I-type coil is easy with one touch, and since it is not necessary to bond the I-type coil and the resin component, it is possible to reduce labor and manufacturing cost.

  In addition, according to the second aspect of the present invention, since the convex portion of the locking piece is formed to have a height dimension larger than the gap between the resin component and the core, the outer periphery of the resin component is formed. After extrapolating the core, it is possible to reliably prevent the locking piece from coming out of the recess even if it is deformed in the out-of-plane direction.

The resin component in one Embodiment of this invention is shown, (a) is a top view, (b) is a front view, (c) is the sectional view on the AA line of (b). It is a perspective view which shows the state which inserts an I-type coil in the resin component of FIG. It is a top view which shows the state which mounted | wore with the I-type coil of FIG. It is a perspective view which shows the state which mounted | wore with one U-shaped core to the resin component of FIG. FIG. 5 is a plan view showing a state where the other U-shaped core is mounted on the resin component of FIG. 4 and a tape is wound thereon. The resin component in other embodiment of this invention is shown, (a) is a top view, (b) is the BB sectional view taken on the line of (a). It is a top view which shows the state which mounted | wore the resin component of FIG. 6 with the I-type coil. It is the partially exploded perspective view which shows the I type coil and resin component in the conventional inductor. It is a perspective view which shows the conventional inductor.

1 to 5 show an embodiment of an inductor according to the present invention. In the figure, reference numeral 1 is an I-type coil obtained by punching a copper plate into a strip shape, and reference numeral 2 is an exterior of the I-type coil 1. Insulating resin parts.
As shown in FIG. 1, the resin component 2 is formed in a rectangular cylindrical shape, and flanges 3a and 3b are integrally formed at both ends thereof.

  Further, the through hole 4 formed in the central portion of the resin component 2 is formed by a wide outer peripheral surface 2a facing the plate surface 1a of the coil 1 and a narrow outer peripheral surface 2b facing the side surface 1b of the coil 1. The coil 1 is formed in a rectangular section that can be inserted loosely.

  The narrow outer peripheral surface 2b adjacent to one flange 3a is formed with a U-shaped groove 5a with the tip directed toward the flange 3a, so that the portion surrounded by the groove 5a is formed. A locking piece 5 that is deformable in the out-of-plane direction by elasticity is formed.

  On the inner surface of the locking piece 5, a convex portion 6 that protrudes into the through hole 4 is formed. Here, the tip of the convex portion 6 is formed by an inclined surface 6a that gradually protrudes into the through hole 4 from the other flange 3b side toward the one flange 3a side.

Further, the wide outer peripheral surfaces 2a of the resin component 2 are formed with rectangular openings 7 through which the convex portions 6 of the locking pieces 5 formed on both outer peripheral surfaces 2b are exposed.
On the other hand, the side surface 1b of the I-type coil 1 is formed with a groove portion (concave portion) 8 with which the convex portion 6 engages.

  A pair of U-shaped cores 9 are packaged on the outer periphery of the resin component 2 in which the I-type coil 1 is inserted into the through hole 4. Here, each of the pair of U-shaped cores 9 is inserted between the flanges 3a and 3b from the outer peripheral surface 2a side of the resin component 2 and abuts the tip portions thereof to surround the outer periphery of the resin component 2 as a whole. And is integrated by the tape 10 wound around the outer periphery. Incidentally, the convex part 6 is formed in the height dimension larger than the clearance gap between the outer peripheral surface 2b of the resin component 2, and the U-shaped core 9. FIG.

  To assemble the inductor having the above configuration, first, the I-type coil 1 is inserted into the through hole 4 of the resin component 2 as shown in FIG. At this time, the I-type coil 1 is inserted in a state where the locking piece 5 of the resin component 2 is deformed outward by the inclined surface 6a of the convex portion 6 that contacts the side surface 1b of the I-type coil 1, and the convex As shown in FIG. 3, the I-type coil 1 is fixed in the resin component 2 by a snap-fit structure in which the portion 6 is engaged in the groove 8 formed in the side surface 1 b of the I-type coil 1.

  Next, as shown in FIG. 4, an adhesive is applied to the outer peripheral surfaces 2 a and 2 b of the resin component 2, and a pair of U-shaped cores (only the lower U-shaped core is shown in the figure) 9 is resin. As shown in FIG. 5, it is completed by winding and integrating the tape 10 on the outer periphery in a state where the tip 2 is inserted between the flanges 3a and 3b from the outer peripheral surface 2a side of the component 2 and the tips are in contact with each other. .

  Therefore, according to the inductor, since the integral resin component 2 is used, the number of components can be reduced as compared with the conventional case, and the work of assembling the I-type coil 1 into the resin component 2 is snap-fit. Since it can be performed with a single touch depending on the structure, it is easy, and since it is not necessary to bond the I-type coil 1 and the resin component 2, labor and manufacturing cost can be reduced.

  Moreover, since the height dimension of the convex portion 6 of the locking piece 5 is formed larger than the gap between the side surface 2b of the resin component 2 on which the locking piece 5 is formed and the U-shaped core 9. In addition, after the U-shaped core 9 is disposed on the outer periphery of the resin component 2 and integrated with the tape 10, the locking piece 5 is deformed in the out-of-plane direction beyond the height of the convex portion 6 and the convex portion 6. Can be reliably prevented from coming off from the groove 8.

  Furthermore, because the wide outer peripheral surfaces 2a of the resin component 2 are formed with rectangular openings 7 through which the convex portions 6 of the locking pieces 5 formed on both adjacent narrow outer peripheral surfaces 2b are exposed. In addition, the engagement state of the convex portion 6 and the groove portion 8 can be visually observed from the opening portion 7, and when a problem occurs, the convex portion 6 is operated from the opening portion 7 to contact the groove portion 8. The I-type coil 1 can be removed by releasing the engagement.

  6 and 7 show another embodiment of the inductor according to the present invention. The configuration of the U-shaped core 9 and the like is the same as that shown in FIGS. The description will be simplified using.

  In this inductor, a U-shaped groove 13a is formed on one wide outer peripheral surface 12a of a rectangular tube-shaped resin component 12 having flanges 11a and 11b formed at both ends, with the tip portion directed toward the flange 11a. As a result, a locking piece 13 that is deformable in an out-of-plane direction by elasticity is formed in a portion surrounded by the groove 13a.

  A convex portion 15 that protrudes into the through hole 14 is formed on the inner surface of the locking piece 13. Here, the tip of the convex portion 15 is also formed by an inclined surface 15a that gradually protrudes into the through hole 14 from the other flange 11b side toward the one flange 11a side.

Further, a square-shaped opening in which the locking piece 13 and the convex portion 15 are exposed is formed on the other wide outer peripheral surface 12a opposite to the wide outer peripheral surface 12a on which the locking piece 13 of the resin component 12 is formed. 16 is formed.
On the other hand, the I-shaped coil 17 is formed with a square hole (concave portion) 18 with which the convex portion 15 is engaged.

  Even in the inductor having the above configuration, when the I-type coil 17 is inserted into the through-hole 14 of the resin component 12, the resin component 12 is locked by the inclined surface 15a of the convex portion 15 that abuts the plate surface 17a of the I-type coil 17. With the snap-fit structure in which the I-type coil 1 is inserted while the piece 13 is deformed outward, and the convex portion 15 engages in the hole 18 formed in the plate surface 17a of the I-type coil 17. As shown in FIG. 7, the I-type coil 17 is fixed in the resin component 12.

  As a result, the same effects as those shown in FIGS. 1 to 5 can be obtained also by the inductor of this embodiment.

1, 17 I-type coil 2, 12 Resin part 5, 13 Locking piece 5a, 13a Groove 6, 15 Protrusion 8 Groove (recess)
9 U-shaped core 18 hole (recess)

Claims (2)

An I-shaped coil made of a metal plate, a rectangular tube-shaped resin component into which the coil is inserted, and a core disposed on the outer periphery of the resin component;
The resin part has a U-shaped groove portion to form a locking piece that can be deformed in the out-of-plane direction by elasticity, and a convex portion is formed on the inner surface of the locking piece. The inductor is characterized in that a recess is formed in which the protrusion is engaged.   The inductor according to claim 1, wherein the convex portion is formed to have a height dimension larger than a gap between the resin component and the core.

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