Wire-wound common-mode choke coil
AssigneeMurata Manufacturing Co., Ltd.
InventorYoshio Hanato
Life of this patent
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Abstract
A wire-wound common-mode choke coil includes a core member provided with a winding core, flanges disposed at both ends of the winding core, and legs for supporting the core member having grooves defined therein, the grooves being provided in each of the flanges. Bottom edges of the grooves are elevated from the periphery of the winding core by about 1.0 to about 1.5 times the diameter of a wire used to define windings provided on the winding core and protrusions are provided at both ends of the winding core. The flank of the protrusions gradually increase in height as they extend toward the flanges.
Claims24
A wire-wound common-mode choke coil, comprising:
- a core member having a winding core and a plurality of windings disposed thereon;
- flanges disposed at both ends of said winding core and including grooves defined therein;
- a plurality of legs located at both ends of the grooves in the flanges;
- and
- a plurality of terminal electrodes, one of the plurality of terminal electrodes being located at an end of each of the legs and connected with an end of the plurality of windings provided on said winding core;
- wherein bottom edges of said grooves are arranged to increase in height from a periphery of said winding core, and protrusions are provided at both ends of said winding core, and a flank of said protrusions being arranged to gradually increase in height toward said flanges.
A wire-wound common-mode choke coil, comprising:
- a core member having a winding core and a plurality of windings disposed thereon;
- flanges disposed at both ends of said winding core and including grooves defined therein;
- a plurality of legs located at both ends of the grooves in the flanges;
- and
- a plurality of terminal electrodes, one of the at least four terminal electrodes being located at an end of the legs and connected with an end of the plurality of windings provided on said winding core;
- wherein the grooves are arranged such that when the windings are not properly arranged, the windings are visible through at least one of the grooves when viewed in a longitudinal direction of the core member and when the windings are properly arranged, the windings are not visible through one of the grooves when viewed in a longitudinal direction of the core member, wherein the windings are properly arranged when no portion of the windings overlaps any other portion of the windings, and the windings are not properly arranged when at least one portion of the windings overlaps another portion of the windings;
- and
- bottom edges of said grooves are elevated from the periphery of said winding core by about 1.0 to about 1.5 times the diameter of the plurality of windings.
A wire-wound common-mode choke coil according to 15, wherein said protrusions extend from the periphery of said winding core toward said legs and are higher than bottom edges of said grooves.
A wire-wound common-mode choke coil, comprising:
- a core member having a winding core and a plurality of windings disposed thereon;
- flanges disposed at both ends of said winding core and including grooves defined therein;
- a plurality of legs located at both ends of the grooves in the flanges, the plurality of legs including beveled corner surfaces provided thereon;
- and
- a plurality of terminal electrodes, one of the plurality of terminal electrodes being located at an end of each of the legs and connected with an end of the plurality of windings provided on said winding core;
- wherein bottom edges of said grooves are arranged to increase in height from a periphery of said winding core, and protrusions are provided at both ends of said winding core, and a flank of said protrusions being arranged to gradually increase in height toward said flanges.
Dependencies are inferred from the claim text.