Lens Driving Device

A lens driving device, comprising:

• a fixation holder;
• an optical image stabilization holder;
• a first elastic support, connecting the fixation holder and the optical image stabilization holder and supporting the optical image stabilization holder to move relative to the fixation holder;
• a focusing unit, comprising a lens with an optical axis and a barrel for holding the lens;
• a second elastic support, connecting the optical image stabilization holder and the barrel and supporting the barrel to move relative to the optical image stabilization holder;
• a first driving unit, driving the barrel to move relative to the optical image stabilization holder along a direction of the optical axis;
• a second driving unit, driving the optical image stabilization holder to move relative to the fixation holder along a first direction perpendicular to the optical axis;
• and
• a third driving unit, driving the optical image stabilization holder to move relative to the fixation holder along a second direction perpendicular to the optical axis and the first direction,
• wherein the first elastic support comprises a metal support and a flexible circuit board at least partially fixed to the metal support;
• the metal support comprises two first fixing parts respectively arranged on two opposite sides of the optical image stabilization holder and fixed to the fixation holder, two second fixing parts respectively arranged on another two opposite sides of the optical image stabilization holder and fixed to the optical image stabilization holder, and four first elastic arms respectively connected between every adjacent first fixing part and second fixing part;
• four first gaps respectively separate every two adjacent first elastic arms;
• the flexible circuit board comprises a third fixing part arranged on one of the two opposite sides of the optical image stabilization holder and fixed to the fixation holder, two fourth fixing parts respectively arranged on the another two opposite sides of the optical image stabilization holder and fixed to the optical image stabilization holder, and two second elastic arms respectively connected between every adjacent third fixing part and fourth fixing part;
• a second gap separates the two second elastic arms;
• each second elastic arm is at least partially fixed to the corresponding first elastic arm;
• each first elastic arm comprises a first portion extending along the direction of the optical axis from the corresponding first fixing part, a second portion extending along the first direction from the first portion, a third portion extending along the second direction from the second portion, and a fourth portion extending along the direction of the optical axis from the third portion and connected to the corresponding second fixing part;
• each second elastic arm comprises a fifth portion extending along the direction of the optical axis from the third fixing part and facing the first portion of the corresponding first elastic arm, a sixth portion extending along the first direction from the fifth portion and facing the second portion of the corresponding first elastic arm, a seventh portion extending along the second direction from the sixth portion and facing the third portion of the corresponding first elastic arm, and an eighth portion extending along the direction of the optical axis from the seventh portion and facing the fourth portion of the corresponding first elastic arm, the eighth portion connected to the corresponding fourth fixing part.