COIL COMPONENT, POWDER-COMPACTED INDUCTOR AND WINDING METHOD FOR COIL COMPONENT

• US 20120268232A1
• Filed: 04/18/2012
• Published: 10/25/2012
• Est. Priority Date: 04/25/2011
• Status: Active Grant

• Current Assignee: Sumida Corporation
• Original Assignee: Sumida Corporation
• Inventors: YAMADA, Satoru, HATAYAMA, Yoshiyuki
• Granted Patent: US 8,864,060 B2
• Time in Patent Office: Days
• US Class Current: 336/222
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 41/064 Winding non-flat conductive wires, e.g. rods, cables or cords
• CPC Class Codes: H01F 41/071 Winding coils of special form winding conductors onto closed formers or cores H01F41/08

Abstract

A coil component includes an air-core winding wire portion wound by a wire with a plurality of wound layers by alignment winding, a spiral shaped wound portion in which the wire wound in a spiral shape from an inner edge of an end surface toward an outer edge thereof along the end surface while in contact with the end surface on one side in the axis direction of the winding wire portion, a first lead portion extended and extracted outward from a winding first end point of the spiral shaped wound portion, and a second lead portion extended and extracted outward from a winding second end point at the outer circumference of the winding wire portion.

Claims

1. A coil component, comprising:

a winding wire portion in which a wire having electrical conductivity is wound into a plurality of wound layers;

a spiral shaped wound portion in which the wire extends from a winding start point at an inner circumference of the winding wire portion and in which the wire is wound in a spiral shape from an inner edge of an end surface toward an outer edge of the end surface along the end surface while the wire is in contact with the end surface, the end surface being located at one side of the winding wire portion in a longitudinal axis direction of the winding wire portion;

a first lead portion extending outwardly from a winding first end point of the spiral shaped wound portion; and

a second lead portion extending outwardly from a winding second end point at an outer circumference of the winding wire portion.

2. The coil component, according to claim 1, wherein

the winding start point at the inner circumference and the winding second end point at the outer circumference of the winding wire portion are both positioned at the one side of the winding wire portion, and

the first and second lead portions both extend outwardly at the one side of the winding wire portion.

3. The coil component, according to claim 2, further comprising a powder-compacted body including compression-molded metal magnetic powder,

the coil component being embedded in the powder-compacted body to yield a powder-compacted inductor.

4. The coil component, according to claim 1, further comprising a powder-compacted body including compression-molded metal magnetic powder,

the coil component being embedded in the powder-compacted body to yield a powder-compacted inductor.

5. A winding method for a coil component, comprising:

fastening a portion of a wire that is continuous to a storage wire to an inner wall portion of one side of a winding frame,

sequentially feeding another end of the wire, and

forming a plurality of wound layers by alignment winding in which adjacent wound wires closely contact each other;

providing a spiral shaped wound portion after the winding wire portion is provided by;

feeding the storage wire and closely attaching the fed storage wire to an end surface so that the wire extends from a winding start point at an inner circumference of the winding wire portion and in which the wire is wound in a spiral shape from an inner edge of the end surface toward an outer edge of the end surface along the end surface while the wire is in contact with the end surface, the end surface being located at one side of the winding wire portion in a longitudinal axis direction of the winding wire portion;

extending a first lead portion outwardly from a winding first end point of the spiral shaped wound portion; and

extending a second lead portion outwardly from a winding second end point at an outer circumference of the winding wire portion.

6. The winding method for a coil component, according to claim 5, wherein

the winding start point at the inner circumference and the winding second end point at the outer circumference of the winding wire portion are both positioned at the one side of the winding wire portion, and

the first and second lead portions both extend outwardly at the one side of the winding wire portion.

7. An electronic component including a coil component which comprises:

a winding wire portion in which a wire having electrical conductivity is wound to provide a plurality of wound layers;

a spiral shaped wound portion in which the wire extends from a winding start point at an inner circumference of the winding wire portion and in which the wire is wound in a spiral shape from an inner edge of an end surface toward an outer edge of the end surface along the end surface while the wire is in contact with the end surface, the end surface being located at one side of the winding wire portion in a longitudinal axis direction of the winding wire portion;

a first lead portion extending outwardly from a winding first end point of the spiral shaped wound portion; and

a second lead portion extending outwardly from a winding second end point at an outer circumference of the winding wire portion.