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1. (WO2017155214) AUTOMATIC FOCUS ADJUSTMENT DEVICE HAVING THREE-POSITION SUPPORT STRUCTURE

Pub. No.:    WO/2017/155214    International Application No.:    PCT/KR2017/001369
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Feb 09 00:59:59 CET 2017
IPC: G03B 13/34
G03B 5/06
G03B 3/10
H04N 5/232
Applicants: JAHWA ELECTRONICS CO., LTD.
자화전자 주식회사
Inventors: KANG, Il Kyu
강일규
KIM, Hee Seung
김희승
KIM, In Soo
김인수
Title: AUTOMATIC FOCUS ADJUSTMENT DEVICE HAVING THREE-POSITION SUPPORT STRUCTURE
Abstract:
An automatic focus adjustment device having a three-position support structure of the present invention comprises: a first frame having a magnet; a second frame having AF coils for moving the first frame in the direction of an optical axis; and a plurality of balls positioned between the first frame and the second frame so as to maintain the state in which the first frame and the second frame are spaced from each other, wherein three balls among the plurality of balls have sizes relatively larger than those of the remaining balls.