Image lens assembly, zoom image capturing unit and electronic device

An electronic device comprising a zoom image capturing unit and at least one fixed-focus image capturing unit;

• wherein the zoom image capturing unit and the at least one fixed-focus image capturing unit face a same side of the electronic device;
• the zoom image capturing unit comprises an image lens assembly, the zoom image capturing unit comprises an optical axis perpendicular to an optical axis of the at least one fixed-focus image capturing unit;
• wherein the image lens assembly comprises four lens groups, the four lens groups being, in order from an object side to an image side along an optical path, a first lens group, a second lens group, a third lens group and a fourth lens group;
• the four lens groups comprises nine lens elements, the nine lens elements being, in order from the object side to the image side along the optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element;
• the first lens group comprises the first lens element and the second lens element, the second lens group comprises at least one lens element, the third lens group comprises at least one lens element, and the fourth lens group comprises the eighth lens element and the ninth lens element;
• wherein the first lens element has positive refractive power, the second lens element has negative refractive power, at least one of an object-side surface and an image-side surface of at least one lens element of the image lens assembly has at least one inflection point in an off-axis region thereof, and at least five lens elements of the image lens assembly are made of plastic material;
• wherein when the image lens assembly is focusing or zooming, an axial distance between the first lens group and the fourth lens group remains a constant, an axial distance between the fourth lens group and an image surface remains a constant, while the second lens group and the third lens group move along the optical axis;
• wherein a maximum value among maximum fields of view of the image lens assembly within a zoom range is FOV_max, a minimum value among maximum fields of view of the image lens assembly within the zoom range is FOV_min, a maximum value among maximum fields of view of the at least one fixed-focus image capturing unit is DFOV, and the following conditions are satisfied:
• 1.25<FOV_max/FOV_min<5.0;
• and
• 40[deg.]<DFOV−FOV_max.