COIL DEVICE

• US 20170140858A1
• Filed: 09/30/2016
• Published: 05/18/2017
• Est. Priority Date: 11/13/2015
• Status: Active Application

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: OHI, Kouyu, MIKOGAMI, Tasuku, TAKAGI, Nobuo, TSUCHIDA, Setu
• Granted Patent: US 10,256,020 B2
• Time in Patent Office: Days
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 27/306 Fastening or mounting coils or windings on core, casing or other support
• CPC Class Codes: H01F 5/04 Arrangements of electric connections to coils, e.g. leads

Abstract

The coil device comprises the magnetic core comprising the axial part and the magnetic core end part connecting to the axial part, the coil part formed by winding the wire around the axial part, and the electrode part provided at the magnetic core end part and made of good conductor. Said electrode part comprises the fixing surface fixed with a wire end part of said wire, and the fixing surface is provided on a side surface which does not intersect with a center axis of said coil part at said magnetic core end part. Said fixing surface is inclined to a direction away from said center axis with respect to a direction towards said magnetic core end part from said axial part.

Claims

1. A coil device comprising

a magnetic core having an axial part and a magnetic core end part connecting to said axial part,

a coil part formed by winding a wire around said axial part, and

an electrode part provided to said magnetic core end part and made of a good conductor, wherein

said electrode part comprises a fixing surface fixed with a wire end part of said wire, and the fixing surface is provided on a side surface which does not intersect with a center axis of said coil part at said magnetic core end part, and

said fixing surface is inclined to a direction away from said center axis with respect to a direction towards said magnetic core end part from said axial part.

2. The coil device as set forth in claim 1, wherein said wire end part comprises an inclined tip surface of which a thickness of a perpendicular direction of said center axis becomes thinner towards a tip.

3. The coil device as set forth in claim 1, wherein said electrode part comprises a non-fixing surface,

said non-fixing surface is provided at said side surface of said magnetic core end part and at a position further away than said fixing surface with respect to said axial part, and the non-fixing surface is closer to said center axis than a fixed end to which the tip of said wire end part on said fixing surface is fixed.

4. The coil device as set forth in claim 2, wherein said electrode part is provided at said side surface of said magnetic core end part and a position further away from said fixing surface with respect to said axial part, and comprises a non-fixing surface closer to said center axis than a fixed end to which the tip of said wire end part of said fixing surface is fixed.

5. The coil device as set forth in claim 1 comprising at least two of said electrode parts including a first electrode part and a second electrode part,

said magnetic core comprises a pair of said magnetic core end part each connecting to both ends of said axial part,

at one of said magnetic core end part, said first electrode part is provided comprising a first fixing surface as said fixing surface where one of said wire end part of said wire is fixed,

at other one of said magnetic core end part, said second electrode part is provided comprising a second fixing surface as said fixing surface where other one of said wire end part of said wire is fixed, and

one of said side surface of said magnetic core end part provided with said first fixing surface and other one of said side surface of said magnetic core end part provided with said second fixing surface are positioned on a same plane.

6. The coil device as set forth in claim 2 comprising at least two of said electrode parts including a first electrode part and a second electrode part,

said magnetic core comprises a pair of said magnetic core end part each connecting to both ends of said axial part,

at one of said magnetic core end part, said first electrode part is provided comprising a first fixing surface as said fixing surface where one of said wire end part of said wire is fixed,

at other one of said magnetic core end part, said second electrode part is provided comprising a second fixing surface as said fixing surface where other one of said wire end part of said wire is fixed, and

one of said side surface of said magnetic core end part provided with said first fixing surface and other one of said side surface of said magnetic core end part provided with said second fixing surface are positioned on a same plane.

7. The coil device as set forth in claim 3 comprising at least two of said electrode parts including a first electrode part and a second electrode part,

said magnetic core comprises a pair of said magnetic core end part each connecting to both ends of said axial part,

at one of said magnetic core end part, said first electrode part is provided comprising a first fixing surface as said fixing surface where one of said wire end part of said wire is fixed,

at other one of said magnetic core end part, said second electrode part is provided comprising a second fixing surface as said fixing surface where other one of said wire end part of said wire is fixed, and

one of said side surface of said magnetic core end part provided with said first fixing surface and other one of said side surface of said magnetic core end part provided with said second fixing surface are positioned on a same plane.

8. The coil device as set forth in claim 4 comprising at least two of said electrode parts including a first electrode part and a second electrode part,

said magnetic core comprises a pair of said magnetic core end part each connecting to both ends of said axial part,

at one of said magnetic core end part, said first electrode part is provided comprising a first fixing surface as said fixing surface where one of said wire end part of said wire is fixed,

at other one of said magnetic core end part, said second electrode part is provided comprising a second fixing surface as said fixing surface where other one of said wire end part of said wire is fixed, and

one of said side surface of said magnetic core end part provided with said first fixing surface and other one of said side surface of said magnetic core end part provided with said second fixing surface are positioned on a same plane.

9. The coil device as set forth in claim 1, wherein said electrode part is a metal terminal fitting.

10. The coil device as set forth in claim 9, wherein said metal terminal fitting comprises an

inner side surface contacting with said side surface of said magnetic core end part, and said fixing surface is inclined with respect to said inner side surface.