Hitachi Metals, Ltd.

Hirohiko Miki

Masaki Nakamura

Shin Nakajima

Mutsuhito Sakaguchi

Sadami Kubota

Hiroshi Okamoto

Mitsuhiro Watanabe

Takayuki Morikawa

Masatoshi Akita

Masahiro Morita

Tadashi Kodani

Fumiko Akano

A core case unit () includes: an annular case () which houses a magnetic core (); and a bobbin () around which a wire is to be wound, wherein the bobbin () includes a cylindrical portion () around which the wire is to be wound, inner flanges () provided at opposite ends of the cylindrical portion, outer flanges () provided on an outer side of the inner flanges with a space being left which is capable of containing a wire end portion, and a gear portion () provided on an outer side of at least one of the outer flanges for receiving rotational force, the bobbin being rotatably supported on the case at the cylindrical portion, an outside diameter of the outer flanges () is greater than an outside diameter of the gear portion which is defined by an addendum circle, and the inner flanges () and the outer flanges () have a recessed portion () through which a wire end portion is to be passed.

Core case unit, coil component, and method for producing coil component

Provided is a magnetic sheet including a resin film and a thin sheet-shaped magnetic body adhered to the resin film by an adhesive layer sandwiched between the thin sheet-shaped magnetic body and the resin film. The thin sheet-shaped magnetic body is made from an Fe-based metal magnetic material, has a thickness of 15 &#x3bc;m to 35 &#x3bc;m, and has an AC relative magnetic permeability (&#x3bc;) in the range of 220 to 770 at a frequency of 500 kHz.

Magnetic sheet, electronic device using same, and method for manufacturing magnetic sheet

A near-field communication antenna comprising at least one annular coil, a planar, non-magnetic resin member holding the annular coil, a planar, soft-magnetic member overlapping the non-magnetic resin member via the annular coil, and terminals to which the conductor wire leads of the annular coil are connected, the annular coil being received in a circumferential recess along the periphery of the non-magnetic resin member lest that it projects from the periphery of the magnetic member, and the conductor wire leads of the annular coil being connected to the terminals through notches provided in the peripheral edge of the soft-magnetic member.

Near-field communication antenna, antenna module and wireless communications apparatus

An antenna comprising a coreless coil formed by winding a conductor wire, a relay member connected to the coil, and a magnetic plate member covering the coil and part of the relay member; the relay member comprising a substrate having a notch for lead wires of the coil, and a pair of terminal members formed on the substrate; each terminal member comprising an internal terminal portion connected to an end of each lead wire, an external terminal portion connected to an external circuit, and a line portion connecting the internal terminal portion to the external terminal portion; the coil and part of the relay member disposed on the magnetic member being fixed to a first adhesive layer on the non-transmission side of the coil; and the internal terminal portion being positioned in a region overlapping the magnetic member, or in a region surrounded by the notch of the magnetic member.

Antenna

A core assembly comprising first and second core members each having a rectangular body around which an X-axis coil and a Y-axis coil are wound, and flanges integrally and diagonally extending from the body; and a bobbin having an annular portion and projections diagonally extending therefrom; the projections of the bobbin being provided with terminal members connected to coil ends of the X-axis coil, the Y-axis coil and the Z-axis; the annular portion of the bobbin acting as a space for disposing the first core member from one side, and providing a space receiving at least partially the body of the second core member from the other side, such that the body of the first core member is at least partially adjacent to the body of the second core member; and a space for winding the Z-axis coil being provided between the projections of the bobbin and the flanges of the second core member.

Three-axis antenna and core assembly used therein

A magnetic core for use in a saturable reactor made of an Fe-based soft-magnetic alloy comprising as essential alloying elements Fe, Cu and M, wherein M is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and having an alloy structure at least 50% in area ratio of which being fine crystalline particles having an average particle size of 100 nm or less. The magnetic core has control magnetizing properties of a residual operating magnetic flux density &Dgr;Bb of 0.12 T or less, a total control operating magnetic flux density &Dgr;Br of 2.0 T or more, and a total control gain Gr of 0.10-0.20 T/(A/m) calculated by the equation: Gr&equals;0.8&times;(&Dgr;Br&minus;&Dgr;Bb)/Hr, wherein Hr is a total control magnetizing force defined as a control magnetizing force corresponding to 0.8&times;(&Dgr;Br&minus;&Dgr;Bb)&plus;&Dgr;Bb.

Magnetic core for saturable reactor, magnetic amplifier type multi-output switching regulator and computer having magnetic amplifier type multi-output switching regulator

Growing community of inventors

Tottori, Japan

Hirohiko Miki