TRANSFORMER

• US 20070159283A1
• Filed: 01/06/2006
• Published: 07/12/2007
• Est. Priority Date: 01/06/2006
• Status: Active Grant

• Current Assignee: Lankom Electronics Co., Ltd.
• Original Assignee: Lankom Electronics Co., Ltd.
• Inventors: Liu, Lu-Ta
• Granted Patent: US 7,236,075 B1
• Time in Patent Office: Days
• US Class Current: 336/90
• CPC Class Codes: H01F 27/022 Encapsulation
• 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 27/29 Terminals; Tapping arrangements for signal inductances

Abstract

A transformer has a cover and a bobbin. The cover has a cavity and a bottom opening. The cavity is formed inside of the over. The bobbin is mounted inside the cavity in the cover and has two surfaces, multiple pins and multiple coils. The pins are mounted through the bobbin and protrude from the two surfaces of the bobbin. The coils are mounted between the pins and have wires connected to each other. After the coils are connected to pins and tested, the bobbin with the coils can be mounted in the cover so that the process of fabricating the transformer is easier.

Claims

1. A transformer comprising

a cover having

a bottom;

a bottom opening formed on the bottom of the cover; and

a cavity formed inside the cover, comminuting with the bottom opening of the cover and having

inside walls;

at least one corner protrusion formed on at least one of the inside walls of the cavity; and

at least one protruding edge formed on at least one of the inside walls of the cavity; and

a bobbin mounted inside the cavity of the cover and having

two surfaces;

engaging edges attaching respectively to the at least one corner protrusion of the cover and the at least one protruding edge of the cover;

multiple pins mounted through the bobbin and protruding from the two surfaces of the bobbin;

an opening formed through the bobbin between the pins; and

multiple coils mounted on the bobbin next to the opening and having wires connecting the coils to the pins.

2. The transformer as claimed in claim 1, wherein the bobbin has 16 pins.

3. The transformer as claimed in claim 1, wherein the bobbin has 20 pins.

4. The transformer as claimed in claim 1, wherein the bobbin has 24 pins.

5. The transformer as claimed in claim 1, wherein the bobbin has 48 pins.