US 11,955,266 B2
Inductor core, electronic pen, and input device
Hitomi Ochiai, Omihachiman (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/764,907
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Sep. 28, 2020, PCT No. PCT/JP2020/036605
§ 371(c)(1), (2) Date Mar. 29, 2022,
PCT Pub. No. WO2021/065791, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-179680 (JP), filed on Sep. 30, 2019.
Prior Publication US 2022/0375673 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 17/04 (2006.01); G06F 3/0354 (2013.01); H01F 1/34 (2006.01); H01F 27/255 (2006.01)
CPC H01F 17/045 (2013.01) [H01F 1/344 (2013.01); H01F 27/255 (2013.01); G06F 3/03545 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inductor core comprising:
a magnetic main body having a pillar shape and comprised of a magnetic material including pores, wherein
the magnetic main body includes:
an inclined portion including an inclined surface that constitutes an outer circumferential surface of a truncated cone having an outer diameter increasing from one end of the magnetic main body toward the other end; and
a straight body portion that is coaxial with the inclined portion and includes an outer peripheral surface that constitutes an outer circumferential surface of a cylindrical column body extending from the other end toward the one end, the straight body portion being connected to the inclined portion, and
a difference between an average value of inter-centroid distances between the pores at the straight body portion and an average diameter of the pores at the straight body portion is greater than a difference between an average value of inter-centroid distances between the pores at the inclined portion and an average diameter of the pores at the inclined portion.