Inductance Element

• US 20080290975A1
• Filed: 05/23/2008
• Published: 11/27/2008
• Est. Priority Date: 05/25/2007
• Status: Active Grant

• Current Assignee: Sumida Corporation
• Original Assignee: Sumida Corporation
• Inventors: Watanabe, Tsutomu
• Granted Patent: US 7,940,153 B2
• Time in Patent Office: Days
• US Class Current: 336/90
• CPC Class Codes: H01F 17/043 with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
• 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 27/292 Surface mounted devices
• CPC Class Codes: H01F 3/10 Composite arrangements of magnetic circuits

Abstract

An inductance element has a first core portion having a winding frame portion; a coil provided on the winding frame portion; a ring-shaped member having an insertion hole to dispose the first core portion therein; and a terminal member having an bonding arm to be fixed to the ring-shaped member via an adhesive member, and a mounting portion.

Claims

1. An inductance element comprising:

a first core portion having a winding frame portion;

a coil provided on the winding frame portion;

a ring-shaped member having an insertion hole to dispose the first core portion therein; and

a terminal member having an bonding arm to be fixed to the ring-shaped member via an adhesive member, and a mounting portion.

2. The inductance element according to claim 1, wherein at least one end of the winding frame portion of the first core portion has a flange.

3. The inductance element according to claim 2, wherein the flange has a cutout portion.

4. The inductance element according to claim 1, wherein the ring-shaped member is made of resin.

5. The inductance element according to claim 1, wherein the ring-shaped member has a groove to dispose the bonding arm therein.

6. The inductance element according to claim 5, wherein the ring-shaped member and the bonding arm are fixed via the adhesive member after the bonding arm is placed in the groove.

7. The inductance element according to claim 6, wherein

the groove is a concave groove provided between an outer wall face and the insertion hole of the ring-shaped member;

and

the adhesive member is hardened as covering not only the groove but also a portion between the first core portion and the ring-shaped member so that the first core portion and the ring-shaped member are fixed to each other.

8. The inductance element according to claim 1, wherein

the terminal member comprising;

a side portion contacting to an outer wall face of the ring-shaped member, whose normal line direction is different from those of the mounting portion and the bonding arm, and

a terminal connecting portion provided on a surface opposite to a surface facing to a mounnting substrate of the first core portion, and electrically connected to a terminal of the coil.