Imaging lens module and electronic device

An imaging lens module, which has an optical axis, comprising:

• a plastic lens barrel having an object-side hole facing towards an object side and an image-side hole facing towards an image side, and comprising:
• a protrusion portion extending towards the optical axis along a direction perpendicular to the optical axis;
• a first inner annular surface connected to an object side of the protrusion portion and the object-side hole, and forming a first receiving space;
• and
• a second inner annular surface connected to an image side of the protrusion portion and the image-side hole, and forming a second receiving space;
• a first optical element assembly disposed in the first receiving space, and comprising:
• a plurality of optical lens elements;
• and
• a second optical element assembly disposed in the second receiving space, and comprising:
• a first light blocking sheet;
• wherein the protrusion portion is an annular-shaped which surrounds the optical axis and forms a central hole, the central hole is located between the first receiving space and the second receiving space;
• wherein a maximum outer diameter of each of the optical lens elements is larger than a minimum inner diameter of the central hole, and all of the optical lens elements which are received in the plastic lens barrel are located on an object side of the central hole;
• wherein a minimum inner diameter of the first light blocking sheet is smaller than the minimum inner diameter of the central hole.