Driving assembly with reduced size and noise, camera module and electronic devices having the same

A camera module comprising:

• a lens assembly,
• a sensor,
• a flexible printed circuit board, and
• a driving assembly, wherein the driving assembly comprising:
• a bottom box,
• an elastic member,
• a movable plate,
• a rigid printed circuit board;
• and
• a plurality of shape memory alloy wires;
• wherein the bottom box comprises a bottom plate and a plurality of side plates connected to the bottom plate, the plurality of side plates and the bottom plate cooperatively define a receiving groove, the plurality of side plates defines a position groove connecting to the receiving groove;
• each of the elastic member, the movable plate, the plurality of shape memory alloy wires, and a portion of the rigid printed circuit board is disposed in the receiving groove, another portion of the rigid printed circuit board is disposed in the position groove, wherein
• the elastic member connects between the bottom plate and the movable plate, the plurality of shape memory alloy wires connects between the movable plate and the rigid printed circuit board,
• the flexible printed circuit board comprises a connecting end portion and a free end portion, the connecting portion connects the movable plate, the sensor is disposed on the connecting portion, an image side of the lens assembly faces the sensor, the flexible printed circuit board connects the rigid printed circuit board electronically.

An electronic device comprising:

• a camera module, wherein the camera module comprises:
• a lens assembly,
• a sensor,
• a flexible printed circuit board, and
• a driving assembly, wherein the driving assembly comprising:
• a bottom box,
• an elastic member,
• a movable plate,
• a rigid printed circuit board;
• and
• a plurality of shape memory alloy wires;
• wherein the bottom box comprises a bottom plate and a plurality of side plates connected to the bottom plate, the plurality of side plates and the bottom plate cooperatively define a receiving groove, the plurality of side plates defines a position groove connecting to the receiving groove;
• the elastic member, the movable plate, the plurality of shape memory alloy wires, and a portion of the rigid printed circuit board are disposed in the receiving groove, another portion of the rigid printed circuit board is disposed in the position groove;
• the elastic member connects between the bottom plate and the movable plate, the plurality of shape memory alloy wires connects between the movable plate and the rigid printed circuit board,
• the flexible printed circuit board comprises a connecting end portion and a free end portion, the connecting portion connects the movable plate, the sensor is disposed on the connecting portion, the lens assembly faces the sensor, the flexible printed circuit board connects the rigid printed circuit board electronically.