Transformer and method of assembling same
AssigneeKoito Manufacturing Co., Ltd.
InventorHisayoshi Murai
Life of this patent
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Abstract
A transformer is accommodated in a case body having reduced size. The transformer includes a primary bobbin, a primary coil wound around the primary bobbin, a secondary bobbin combined with the primary bobbin such that the primary coil surrounds the secondary bobbin, and a secondary coil wound around the secondary bobbin. Primary and secondary terminals are respectively connected to the primary and secondary coils such that the primary terminal projects in the same direction as the secondary terminal.
Claims18
A transformer to be accommodated in a case body of reduced size, comprising:
- a primary bobbin;
- a primary coil wound around the primary bobbin;
- a primary terminal connected to the primary coil;
- a secondary bobbin combined with the primary bobbin such that the primary coil surrounds the secondary bobbin;
- a secondary coil wound around the secondary bobbin;
- and
- a secondary terminal connected to the secondary coil, wherein the primary terminal projects in the same direction as the secondary terminal, wherein the primary bobbin has a grip portion for gripping the secondary bobbin, and an elastic force urges against the grip portion toward the direction where the secondary bobbin is gripped.
A method of assembling a transformer, comprising the steps of:
- winding a secondary coil around a secondary bobbin;
- connecting at least one secondary terminal to the secondary coil;
- inserting the secondary bobbin with the secondary coil into a primary bobbin through an opening defined on a side of a primary bobbin, the opening being defined on a side perpendicular to an axis of the secondary bobbin;
- winding a primary coil around a primary bobbin such that the primary coil surrounds the secondary bobbin;
- and
- connecting at least one primary terminal to the primary coil, wherein the primary terminal projects in the same direction as the secondary terminal, wherein the primary bobbin has a grip portion for gripping the secondary bobbin, and an elastic force urges against the grip portion toward the direction where the secondary bobbin is gripped.
Dependencies are inferred from the claim text.