Surface mount coil with edgewise winding

• US 20030218527A1
• Filed: 04/15/2003
• Published: 11/27/2003
• Est. Priority Date: 05/24/2002
• Status: Active Grant

• Current Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Original Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Inventors: Okamoto, Toshinori
• Granted Patent: US 6,922,130 B2
• Time in Patent Office: Days
• US Class Current: 336/208
• CPC Class Codes: H01F 2017/046 helical coil made of flat wire, e.g. with smaller extension of wire cross section in the direction of the longitudinal axis
• CPC Class Codes: H01F 27/027 specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
• CPC Class Codes: H01F 27/292 Surface mounted devices

Abstract

A surface mount coil comprises: a flanged spool, which includes a spool section and a flange section integrally connected with one end of the spool section; a base flange, which is shaped substantially rectangular and fixedly connected to the other end of the spool section; and an edgewise wound coil, which is made of a rectangular insulated wire, and which is structured such that starting and finishing ends of the rectangular insulated wire lead out in parallel with each other around the base flange in such a manner as to extend along and on one side surface, a bottom surface, and another side surface opposite to the one side surface, and are fixed at an edge of a top surface of the base flange.

Claims

1. A surface mount coil comprising:

a flanged spool comprising a spool section and a flange section integrally connected with one end of said spool section;

a base flange shaped substantially rectangular and fixedly connected to the other end of said spool section; and

an edgewise wound coil made of a rectangular insulated wire, and structured such that starting and finishing ends of said rectangular insulated wire lead out in parallel with each other around said base flange in such a manner as to extend along and on one side surface, a bottom surface, and another side surface opposite to said one side surface, and are fixed at an edge of a top surface of said base flange.

2. A surface mount coil as claimed in claim 1, wherein said starting and finishing ends of said edgewise wound coil are fixed tightly on at least one notch formed on said another side surface opposite to said one side surface of said base flange.

3. A surface mount coil as claimed in claim 1 or 2, wherein said starting and finishing ends of said edgewise wound coil are provided with solder thereby constituting electrodes.

4. A surface mount coil as claimed in claim 3, wherein a bridge is provided between said electrodes on said bottom surface of said base flange.

5. A surface mount coil as claimed in claim 3 or 4, wherein said electrodes are fixed to said bottom surface of said base flange by means of adhesive.

6. A surface mount coil as claimed in claim 5, wherein said bottom surface of said base flange is provided with at least one adhesive pit and a plurality of adhesive guiding grooves for filling and guiding adhesive.

7. A surface mount coil as claimed in claim 6, wherein edges of said base flange are chamfered.

8. A surface mount coil as claimed in any one of claims 1 to 7, wherein a plastic covering case is provided, which covers said edgewise wound coil and said flanged spool, and which is fixedly attached to said base flange.

9. A surface mount coil as claimed in claim 8, wherein said plastic covering case is fixed to said base flange such that hooks provided on said plastic covering case are engaged with grooves provided on said base flange, and wherein an inner surface of a top of said plastic covering case presses against said flange section of said flanged spool.