Camera module and electronic device

An electronic device, comprising:

• a computing controller;
• and
• a camera module electrically connected to the computing controller and comprising:
• an optical camera lens;
• a variable aperture, comprising a case, a second carrier, and a plurality of blades, wherein each blade of the plurality of blades is rotatably connected to the case by a respective rotation shaft that is fastened to the case, and the case covers a sidewall of the second carrier between a surface of the second carrier that is closest to the plurality of blades and a surface of the second carrier that faces away from the plurality of blades;
• and
• a shape memory alloy (SMA) motor,
• wherein:
• relative positions of the variable aperture and the optical camera lens are fixed,
• the variable aperture has an aperture hole whose size is adjustable,
• the aperture hole is located on a light inlet side of the optical camera lens, and
• the aperture hole is opposite to a light inlet surface of the optical camera lens, and
• wherein:
• the SMA motor comprises a first carrier, a base, and an SMA drive assembly,
• the optical camera lens is fastened to the first carrier,
• the SMA drive assembly is connected between the first carrier and the base,
• the SMA drive assembly is configured to drive the first carrier, the optical camera lens, and the variable aperture to move together relative to the base to implement automatic focusing or optical image stabilization, and
• the case of the variable aperture is mounted on a step surface of the optical camera lens.