Coil device

• US 10,002,705 B2
• Filed: 11/06/2017
• Issued: 06/19/2018
• Est. Priority Date: 11/09/2016
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Komaya, Yuma, Suzuki, Hiroshi
• Primary Examiner(s): Ng, Sherman
• Application Number:
  US15/804,387
• Publication Number:
  US 20180130597A1
• Time in Patent Office: 225 Days
• Field of Search: 174260
• CPC Class Codes: H01F 1/36 in the form of particles H01F1/346, H01F1/348 and H01F1/38 take precedence
• CPC Class Codes: H01F 17/045 with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 2201/1003 Non-printed inductor

Abstract

Provided is coil device 1 including: core 10 including winding core part 12 and flange parts 14a, 14a provided on both edges of winding core part 12, and coil part 30 including wires 31, 32 wound on winding core part 12. Electrode film 40, having wire connecting part 41 where wire edges 31a, 31b, 32a, 32b are connected, and formed on a surface of the flange parts 14a, 14a. Metal terminal 50 is connected to a terminal fitting part 42 formed on a surface of electrode film 40 at a place different from the wire connecting part. According to the invention, a coil device having a high reliability for bonding at mounting part can be provided.

Claims

1. A coil device comprising:

a core including a winding core part and a flange part provided on an edge of the winding core part,

a coil part comprised of a wire wound on the winding core part,

an electrode film having a wire connecting part where a wire edge of the wire is connected, and the electrode film is formed on a surface of the flange part, and

a metal terminal is connected to a terminal fitting part and is formed on a surface of the electrode film at a place different from the wire connecting part, wherein

the metal terminal is fixed to the flange part by an adhesion member, at a place where the electrode film is not formed.

2. The coil device according to claim 1, further comprising a plate member having a flat external face.

3. The coil device according to claim 1, wherein the metal terminal comprises:

a mounting part faced and connected to a surface of a circuit board, and

a mounting assistance part formed continuously from the mounting part.

4. The coil device according to claim 3, wherein the mounting part is disposed opposite to the wire connecting part respectively on the opposite sides of the flange part.

5. The coil device according to claim 3, wherein the wire connecting part is disposed adjacent to the mounting part on the same side of the flange part.

6. The coil device according to claim 5, wherein

a pair of the metal terminals are provided on the flange part, and

the wire connecting part is disposed between a pair of the mounting parts respectively formed on the pair of the metal terminals.