Coil device
AssigneesTDK Corporation, TDK Korea Corporation
InventorsHiroshi Maeda, Terumasa Toyoda, Kiho Hwang, Sukho Shin
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Abstract
A coil device 10 comprises a first bobbin 40 having a first bobbin plate 42 provided with a first hollow cylinder 44 on which a primary coil 20 is wound at the outer periphery, and a second bobbin 50 mounted on the first bobbin 40 and having a second bobbin plate 52 provided with a second hollow cylinder 54 on which a secondary coil 30 is wound at the outer periphery. A winding center C1 of the primary coil 20 and a winding center C2 of the secondary coil 30 displace with a predetermined displacement (Lx) along a predetermined reference direction X.
Claims9
A coil device comprising;
- a first bobbin provided with a first hollow cylinder on which a primary coil is wound at the outer periphery, and
- a second bobbin mounted on said first bobbin and provided with a second hollow cylinder on which a secondary coil is wound at the outer periphery, wherein;
- a winding center of said primary coil and a winding center of said secondary coil displace with a predetermined displacement along a predetermined reference direction;
- said first bobbin and said second bobbin are assembled so that a first through hole of said first hollow cylinder is connected with a second through hole of said second hollow cylinder,
- a middle leg of a ferrite core is inserted into these first through hole and second through hole, and
- a proportion of said predetermined displacement with respect to a predetermined reference length of the middle leg of said ferrite core along said predetermined reference direction is 0.05 to 0.30.
Dependencies are inferred from the claim text.