Title:
INDUCTOR CORE, ELECTRONIC PEN CORE PORTION, ELECTRONIC PEN, AND INPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/189938
Kind Code:
A1
Abstract:
This inductor core comprises a tubular magnetic material body 10 made of magnetic material. The magnetic material body 10 includes: an inclined portion 11 having an inclined surface 11a forming a peripheral surface of a truncated cone having an outer diameter that increases from one end 10a toward the other end 10b of the magnetic material body 10; and a straight trunk portion 12 which is disposed coaxially with the inclined portion 11, extends from the other end 10b toward the one end 10a, includes outer peripheral surfaces 12a, 12b forming peripheral surfaces of a cylindrical body, and connects with the inclined portion 11. An arithmetic mean coarseness Ra in an outer peripheral surface 12c in the vicinity of the other end 10b of the straight trunk portion 12 is smaller than an arithmetic mean coarseness Ra in the outer peripheral surface 12b of the straight trunk portion 12 in the vicinity of the inclined portion 11.
Inventors:
OCHIAI HITOMI (JP)
Application Number:
PCT/JP2019/014541
Publication Date:
October 03, 2019
Filing Date:
April 01, 2019
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
H01F3/08; G06F3/03; G06F3/046
Domestic Patent References:
| WO2017183526A1 | 2017-10-26 | |||
| WO2018225719A1 | 2018-12-13 | |||
| WO2017183526A1 | 2017-10-26 |
Other References:
See also references of EP 3780026A4
Attorney, Agent or Firm:
SAIKYO, Keiichiro (JP)
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