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|1. (WO2017155214) AUTOMATIC FOCUS ADJUSTMENT DEVICE HAVING THREE-POSITION SUPPORT STRUCTURE|
|Applicants:||JAHWA ELECTRONICS CO., LTD.
|Inventors:||KANG, Il Kyu
KIM, Hee Seung
KIM, In Soo
|Title:||AUTOMATIC FOCUS ADJUSTMENT DEVICE HAVING THREE-POSITION SUPPORT STRUCTURE|
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.