Core for inductor, core body for electronic pen, electronic pen and input device

摘要

A cylindrical magnet body 10 comprising a magnetic material is included.The magnetic bodyAn inclined portion 11 having an inclined surface 11a which is a peripheral surface of a truncated cone having an outer diameter extending from one end 10a to the other end 10b of the magnetic body 10, andCoaxial with slope 11;Extending from the other end 10B toward one endThe outer surface 12a of the cylindrical bodyHaving 12bIt has a cylindrical body 12 connected to the inclined partThe arithmetic mean roughness Ra at the outer peripheral surface 12C in the vicinity of the other end 10b of the straight body 12 isThe core of the inductor is smaller than the arithmetic mean roughness Ra in the outer peripheral surface 12b of the straight body 12 near the inclined portion 11.Diagram