COIL DEVICE

• US 20180012699A1
• Filed: 06/09/2017
• Published: 01/11/2018
• Est. Priority Date: 07/07/2016
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: ARIMITSU, Kazunori, KIKUCHI, Shunpei, OBA, Akiumi
• Granted Patent: US 10,249,429 B2
• Time in Patent Office: Days
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/022 Encapsulation
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 27/30 Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support

Abstract

At the position where the lead art of the wire is projecting out from the outer face of the core part and spaced apart from the side face, the bonding part between the lead part and the terminal electrode is formed. The terminal electrode comprises the terminal body installed along the side face of the core body, and the lead supporting part bended from the terminal body towards the bonding part at the near position where the lead part projects out from the side face of the core part. The crossing angle of the lead supporting part with respect to the side face of the core body is less than 90 degrees.

Claims

1. A coil device comprising a coil part having a wire wound around in a coil form,

a core part having a magnetic material and a resin and covering entire said coil part including an inside of said coil part, and

a terminal electrode installed at an outer face of said core part, wherein

a lead part of said wire projects out from the outer face of said core part and a bonding part between said lead part and said terminal electrode is formed at a position spaced apart from said outer face,

said terminal electrode comprises a terminal body installed along the outer face of said core body, and a lead supporting part bent from said terminal body towards said bonding part at the position near where said lead part projects out from the outer face of said core part, and

a crossing angle θ

1 of said lead supporting part with respect to an inner face of said terminal electrode is less than 90 degrees.

3. The coil device as set forth in claim 1, wherein an inclined face guiding said lead part on said lead supporting part is formed at a corner part of one side in a width direction of said lead support part from a middle of said lead supporting part to said bonding part.

4. The coil device as set forth in claim 1, wherein a contact flat face substantially parallel to said lead part is formed at a tip part of said lead supporting part.

6. The coil device as set forth in claim 1, wherein said terminal body comprises a main terminal body and a sub terminal body, and

said lead support part is formed as one body to said sub terminal body.

8. The coil device as set forth in claim 6, wherein an installation grove is formed at the outer face of said core part positioned at both sides of a coil axis direction of said coil part, and

a resilience peace positioned at both sides of said coil axis direction of said main terminal body is engaged with said installation groove.

10. The coil device as set forth in claim 6, wherein at one side of said coil axis direction of said main terminal body, an installation piece installed to one side face of said coil axis direction of said core part is formed integrally to said main terminal body.

2. A coil device comprising a coil part having a wire wound around in a coil form,

a core part having a magnetic material and a resin and covering entire said coil part including an inside of said coil part, and

a terminal electrode installed at an outer face of said core part, wherein

a lead part of said wire projects out from the outer face of said core part and a bonding part between said lead part and said terminal electrode is formed at a position spaced apart from said outer face,

said terminal electrode comprises a terminal body installed along the outer face of said core body, and a lead supporting part bent from said terminal body towards said bonding part at the position near where said lead part projects out from the outer face of said core part, and

a crossing angle θ

2 of said lead supporting part with respect to said lead part is less than 90 degrees.

5. The coil device as set forth in claim 2, wherein a contact flat face substantially parallel to said lead part is formed at a tip part of said lead supporting part.

7. The coil device as set forth in claim 2, wherein said terminal body comprises a main terminal body and a sub terminal body, and

said lead support part is formed integrally to said sub terminal body.

9. The coil device as set forth in claim 7, wherein an installation grove is formed at the outer face of said core part positioned at both sides of a coil axis direction of said coil part, and

a resilience peace positioned at both sides of said coil axis direction of said main terminal body is engaged with said installation groove.

11. The coil device as set forth in claim 7, wherein at one side of said coil axis direction of said main terminal body, an installation piece installed to one side face of said coil axis direction of said core part is formed integrally to said main terminal body.

12. The coil device as set forth in claim 2, wherein an inclined face guiding said lead part on said lead supporting part is formed at a corner part of one side in a width direction of said lead support part from a middle of said lead supporting part to said bonding part.