Inductance element

• US 7,940,153 B2
• Filed: 05/23/2008
• Issued: 05/10/2011
• Est. Priority Date: 05/25/2007
• Status: Active Grant

• Current Assignee: Sumida Corporation
• Original Assignee: Sumida Corporation
• Inventors: Watanabe, Tsutomu
• Primary Examiner(s): Mai; Anh T
• Assistant Examiner(s): LIAN, MANG TIN BIK
• Application Number:
  US12/126,526
• Publication Number:
  US 20080290975A1
• Time in Patent Office: 1,082 Days
• Field of Search: None
• US Class Current: 336/192
• 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 a side portion, a bonding arm which is fixed to the ring-shaped member via an adhesive on top and is formed to bend vertically from said side portion, a mounting portion which is bent vertically from said side portion and terminal connecting part which is bent vertically from said side portion and is electrically connected to terminals of lead out portion of coil and wherein said bonding arm is buried in said adhesive member.

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

wherein said terminal connecting part is provided on a surface opposite to a surface facing to a mounting substrate of the first core portion.