JP2015115448A - Inductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductor capable of easily achieving winding of a lead wire that forms an annular coil to a core and fall-off prevention of the coil from the core.SOLUTION: An inductor 10 is so configured that a longitudinal member 11, including a plurality of end faces 11a and 11b and having flexibility, a lead wire 12 bitten into and wound around the longitudinal member 11, and the end faces 11a and 11b of the longitudinal member 11 around which the lead wire 12 is wound are disposed to become closer with each other and the longitudinal member 11 is formed in an annular shape.

Description

  The present invention relates to an inductor, often called a coil, that can store energy in a magnetic field formed by a flowing current.

  For example, as an annular inductor constituting a closed magnetic circuit or a semi-closed magnetic circuit, a linear air core coil in which a conductive wire is wound in advance is passed from an end surface of a core that is folded and brought close to both ends of a rod shape. Furthermore, it slides on the core and is attached to the core, that is, it is formed by inserting a pre-wound air core coil into the annular core, and it is formed in the core that the air core coil comes out of the core What is performed by the protruding portion is known (see, for example, Patent Document 1).

  In addition, in the case of forming a linear air-core coil pre-wound with a wire coated with a heat-adhesive varnish from the end face of the core, which is also formed annularly, the heat-adhesive varnish is heated. It is known that the coil is prevented from coming out of the core by being softened and then cooled and bonded to the core by cooling (for example, see Patent Document 2).

JP 2003-189899 A JP-A-8-37123

  However, in the technique described in Patent Document 1, in order to prevent the coil from coming off from the core, it is necessary to provide a protrusion on the core, so that the core has a complicated shape.

  Moreover, in the technique described in Patent Document 2, a heat-adhesive varnish is used to prevent the coil from coming off from the core. Therefore, heating and cooling of the coil are required for the adhesion.

  The present invention has been devised in view of such circumstances, and an object of the present invention is to provide an inductor that can easily realize winding of a conducting wire forming an annular coil around a core and prevention of removal of the coil from the core.

  In order to solve the above-mentioned problem, an inductor according to claim 1 is provided with a flexible longitudinal member having a plurality of end faces, a conductive wire wound around the longitudinal member, and The gist is that the end faces of the longitudinal member around which the conducting wire is wound are arranged so as to approach each other, and the longitudinal member is formed in an annular shape.

  According to this, since the conducting wire can be directly wound around the longitudinal member, the winding of the conducting wire is facilitated, and the conducting wire is encroached into the longitudinal member and wound. By itself, it is possible to prevent the lead wire from coming off from the longitudinal member, that is, it is not necessary to provide a special prevention for the coil from coming off from the core.

  The gist of an inductor according to a second aspect is that, in the first aspect, the end faces of the elongate member are arranged so as to approach each other by a predetermined amount including a spring back portion of the conducting wire.

  According to this, a predetermined annular inductor can be formed by arranging the end faces of the longitudinal members so as to approach each other by a predetermined amount including the spring back portion of the conducting wire.

  The gist of an inductor according to claim 3 is that, in claim 1 or 2, an elastic modulus of the conducting wire is larger than that of the longitudinal member.

  According to this, the arrangement | positioning which made the said end surfaces of the said longitudinal member approach may be hold | maintained with the said conducting wire, and a special member is not required for the arrangement | positioning holding | maintenance.

  The gist of an inductor according to claim 4 is that, in any one of claims 1 to 3, the end faces are integrally connected.

  According to this, an annular inductor having a closed magnetic circuit can be formed.

  The inductor according to claim 5 is the inductor according to any one of claims 1 to 4, wherein the elongated member is H-NBR (hydrogenated acrylonitrile butadiene rubber), NBR (acrylonitrile butadiene rubber), ACM (acrylic rubber), The gist is that it is formed of a rubber material containing a kind of FKM (fluoro rubber).

  According to this, the flexible longitudinal member can be formed of the rubber material.

  The inductor according to claim 6 is the synthetic resin according to any one of claims 1 to 4, wherein the elongated member includes one of polyimide, polyethersulfone, epoxy resin, polyethylene terephthalate, and polytetrafluoroethylene. The gist is that it was formed.

  According to this, the flexible longitudinal member can be formed of synthetic resin.

  An inductor according to a seventh aspect is the inductor according to any one of the first to sixth aspects, wherein the longitudinal member is formed by dispersing soft magnetic powder containing one of Fe, Fe-Si, sendust, ferrite, and amorphous. This is the gist.

  According to this, the magnetic field can be strengthened.

  The inductor according to claim 8 is the inductor according to any one of claims 1 to 7, wherein the conductive wire is made of a good electric body containing one of copper, aluminum, gold, and silver, and has an insulating film on a surface thereof. The gist.

  According to this, since conducting wires can be stacked by insulating the conducting wire itself as compared to forming an insulating film on the longitudinal member, the conducting wire can be wound in multiple layers.

It is a figure which shows the elongate member in embodiment of this invention. It is a figure which shows the state which wound the conducting wire around the longitudinal member in embodiment of this invention. It is a figure which shows the state which bent the elongate member in embodiment of this invention. It is a figure which shows the inductor in embodiment of this invention.

An inductor 10 according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the elongated member 11 has a similar shape such as a bar, a plate, a tube, etc., which is continuous in one direction, and the cross-sectional shape is any of a circle, an ellipse, a polygon, etc. It can be used in any shape. The longitudinal member 11 is a rubber material containing one of H-NBR (hydrogenated acrylonitrile butadiene rubber), NBR (acrylonitrile butadiene rubber), ACM (acrylic rubber), and FKM (fluoro rubber) in order to impart flexibility. Alternatively, it is molded by compression molding, injection molding, or extrusion molding using a synthetic resin including one of polyimide, polyether sulfone, epoxy resin, polyethylene terephthalate, and polytetrafluoroethylene. The longitudinal member 11 is preferably formed by dispersing soft magnetic powder containing one of Fe, Fe-Si, Sendust, ferrite, and amorphous in order to strengthen the magnetic field.

  The conducting wire 12 is made of a good electrical conductor containing one of copper, aluminum, gold, and silver, and its surface is insulated with enamel or the like, and is biased while being bitten into the longitudinal member 11 as shown in FIG. Without being wound evenly in the axial direction. FIG. 2 shows an example in which the conducting wire 12 is wound on the longitudinal member 11 by one layer. Since the conducting wire 12 can be directly wound around the longitudinal member 11 in a substantially straight state, the winding of the conducting wire 12 is easier than winding around an annular member that is difficult to insert into the annular hole portion. Become. Moreover, it can prevent that the conducting wire 12 pulls out from a longitudinal member by making the conducting wire 12 bite into the longitudinal member 11, and winding.

  The longitudinal member 11 wound with the conductive wire 12 is disposed so that the end surfaces 11a and 11b at both ends thereof are brought close to each other by bending, for example, and the longitudinal member 11 is formed in an annular shape. The longitudinal member 11 can be formed in a predetermined annular shape by arranging the end surfaces 11a and 11b so as to approach each other by a predetermined amount including the spring back portion of the conducting wire 12. The longitudinal member 11 wound with the conducting wire 12 is arranged so that the end surfaces 11a and 11b are close to each other, so that the end surface 11a and the end surface 11b face each other or either the end surface 11a or the end surface 11b. One of them includes a side surface 11c adjacent to the other end surface, and the like includes both a gap and no gap. Therefore, the annular member 11 formed by arranging the elongated member 11 around which the conducting wire 12 is wound so that the end faces 11a and 11b are close to each other includes a circle, an ellipse, a polygon, and a D-shape. Or a shape such as a J-shape. In addition, in order for the longitudinal member 11 wound with the conducting wire 12 to be disposed with the end surfaces 11a and 11b approaching each other, it is easier to reduce the thickness of the annularly formed longitudinal member 11. it is obvious. When the elastic modulus of the conducting wire 12 is made larger than that of the longitudinal member 11, the arrangement of the longitudinal member 11 in which the end surfaces 11 a and 11 b are brought close to each other can be held by the conducting wire 12.

  FIG. 4 shows an annular inductor 10 in which the end face 11a and the end face 11b at both ends of the approaching longitudinal member 11 are integrally coupled with an adhesive 13 or the like to form a closed magnetic circuit. 11 functions as a so-called magnetic core, and the conductive wire 12 functions as a so-called coil. In addition, since the elastic modulus of the conducting wire 12 is smaller than that of the longitudinal member 11, the so-called longitudinal member 11 in which the end surface 11 a and the end surface 11 b at both ends of the longitudinal member 11 are close to each other has an annular shape. In this way, the end face 11a and the end face 11b of the both ends of the longitudinal member 11 are integrally connected with the adhesive 13 or the like so that the end faces 11a and 11b are close to each other. The arrangement of the member 11 can be maintained, and the longitudinal member 11 can be held in an annular shape.

  In addition, when the end surfaces 11a and 11b at both ends of the approaching longitudinal member 11 are arranged so as to form a gap (not shown) having a predetermined distance and the longitudinal member 11 is formed in an annular shape, A closed magnetic circuit can be constructed.

  Since the conducting wire 12 is bitten into the longitudinal member 11, the conducting wire 12 is not biased to a specific portion in the axial direction of the longitudinal member 11 even when the end faces 11 a and 11 b of the longitudinal member 11 are brought close to each other. Since the magnetic flux density is maintained, the distribution of the magnetic flux density becomes uniform, and the deterioration of the DC superimposition characteristic can be prevented.

  As described above, according to the inductor 10 of the embodiment of the present invention, the longitudinal member 11 having a plurality of end faces 11a and 11b and having flexibility, and the longitudinal member 11 is bitten and wound. Since the conducting wire 12 and the end faces 11a and 11b of the longitudinal member 11 around which the conducting wire 12 is wound are arranged so as to approach each other and the longitudinal member 11 is formed in an annular shape, the conducting wire 12 is elongated. Since the lead wire 12 can be wound directly, the winding of the conducting wire 12 is facilitated, and the conducting wire 12 is bitten into the longitudinal member 11 and is wound. Therefore, it is not necessary to provide a special prevention for preventing the coil from coming off from the core.

  As described above, according to the inductor 10 of the embodiment of the present invention, the end faces 11a and 11b of the longitudinal member 11 are arranged close to each other by a predetermined amount including the spring back portion of the conducting wire 12, and therefore, a predetermined annular shape is provided. Inductor 10 can be formed.

  As described above, according to the inductor 10 of the embodiment of the present invention, since the elastic modulus of the conducting wire 12 is larger than that of the longitudinal member 11, the arrangement in which the end faces 11a and 11b of the longitudinal member 11 are brought close to each other is conducted. 12, no special member is required to maintain the arrangement.

  As described above, according to the inductor 10 of the embodiment of the present invention, since the end faces 11a and 11b of the longitudinal member 11 are integrally connected, the annular inductor 10 having a closed magnetic circuit can be formed.

  As described above, according to the inductor 10 of the embodiment of the present invention, the elongated member 11 includes the H-NBR (hydrogenated acrylonitrile butadiene rubber), NBR (acrylonitrile butadiene rubber), ACM (acrylic rubber), and FKM (fluorine). The rubber-like long member 11 can be formed of a rubber material.

  As described above, according to the inductor 10 of the embodiment of the present invention, the longitudinal member 11 is formed of a synthetic resin including one of polyimide, polyethersulfone, epoxy resin, polyethylene terephthalate, and polytetrafluoroethylene. Therefore, the flexible longitudinal member 11 can be formed of a synthetic resin.

  As described above, according to the inductor 10 of the embodiment of the present invention, the elongated member 11 is formed by dispersing soft magnetic powder containing one of Fe, Fe-Si, sendust, ferrite, and amorphous, so that the magnetic field Can be strengthened.

  As described above, according to the inductor 10 of the embodiment of the present invention, the conductive wire 12 is made of a good electric body containing one of copper, aluminum, gold, and silver, and has an insulating film on the surface thereof. Compared to forming an insulating film on the conductor 11, the conductor 12 can be stacked by being insulated, so that the conductor 12 can be wound in multiple layers.

  In addition, when there are a plurality of embodiments, it is obvious that the characteristic portions of each embodiment can be appropriately combined unless otherwise specified.

DESCRIPTION OF SYMBOLS 10 ... Inductor 11 ... Longitudinal member 11a, 11b ... End surface 12 of longitudinal member ... Conductive wire 13 ... Adhesive

Claims (8)

A longitudinal member having a plurality of end faces and having flexibility;
A conducting wire wound into the longitudinal member and wound;
An inductor in which end faces of a longitudinal member around which the conducting wire is wound are arranged so as to approach each other, and the longitudinal member is formed in an annular shape.   2. The inductor according to claim 1, wherein the end surfaces of the longitudinal members are arranged so as to approach each other by a predetermined amount including a spring back portion of the conducting wire.   The inductor according to claim 1, wherein an elastic modulus of the conducting wire is larger than that of the longitudinal member.   The inductor according to any one of claims 1 to 3, wherein the end faces are integrally connected.   The longitudinal member is formed of a rubber material containing one of H-NBR (hydrogenated acrylonitrile butadiene rubber), NBR (acrylonitrile butadiene rubber), ACM (acrylic rubber), and FKM (fluoro rubber). The inductor according to any one of the above.   5. The inductor according to claim 1, wherein the longitudinal member is formed of a synthetic resin including one of polyimide, polyethersulfone, epoxy resin, polyethylene terephthalate, and polytetrafluoroethylene.   The inductor according to any one of claims 1 to 6, wherein the longitudinal member is formed by dispersing soft magnetic powder containing one of Fe, Fe-Si, Sendust, ferrite, and amorphous.   The inductor according to any one of claims 1 to 7, wherein the conductive wire is made of a good electric conductor including one of copper, aluminum, gold, and silver, and has an insulating film on a surface thereof.

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