Coil device

A coil apparatus comprising:

• a core;
• a coil provided around the core, the coil including at least a first coil portion and a second coil portion;
• and
• terminals, wherein
• a boundary end surface of the first coil portion on a second coil portion side is inclined in such a manner that an inner peripheral side of the boundary end surface of the first coil portion is closer to the second coil portion than an outer peripheral side of the boundary end surface of the first coil portion,
• the core has terminal attachment portions at opposing both ends thereof and has a winding portion in an intermediate portion thereof,
• the coil is formed of a winding wound around the winding portion,
• the terminal is a part to which an end of the winding is connected, formed of one metal sheet, and includes an attachment portion, an intermediate portion, and a bottom portion,
• one end of the attachment portion is fixed to the terminal attachment portion of the core,
• one end of the intermediate portion is continuous with the other end of the attachment portion at a bent portion,
• the bottom portion has one end which is continuous with the other end of the intermediate portion at a bent portion, faces the attachment portion, and has the other end as a free end, and
• the intermediate portion has a hole in a plane thereof, and both inner edges of the hole which face each other in at least one direction have an arc shape.