Camera driving module and electronic device

A camera driving module, comprising;

• a base comprising a central opening;
• a casing disposed on the base, and the casing comprising an opening hole corresponding to the central opening of the base;
• a lens unit movably disposed on the casing;
• and
• a focus driving part configured to drive the lens unit to move in a direction parallel to an optical axis of the lens unit, and the focus driving part comprising:
• a carrier disposed on the lens unit, and the carrier being movable in the direction parallel to the optical axis;
• an AF coil element fixed to the base, and the AF coil element facing toward the carrier;
• at least two permanent magnets fixed on one side of the carrier facing toward the base, wherein the at least two permanent magnets are disposed opposite to each other about the optical axis, and one of the at least two permanent magnets comprises a corresponding surface facing toward the AF coil element;
• and
• a Hall element facing toward one of the at least two permanent magnets;
• wherein the Hall element detects a displacement of the lens unit in parallel with the optical axis according to a position of one of the at least two permanent magnets, and the AF coil element and the corresponding surface are arranged in the direction parallel to the optical axis;
• wherein a distance parallel to the optical axis between the AF coil element and the at least two permanent magnets is Dc, a distance parallel to the optical axis between the Hall element and the at least two permanent magnets is Dh, and the following condition is satisfied:
• 0.0<Dc/Dh≤1.0.