Imaging lens assembly, image capturing device and electronic device

An imaging lens assembly, having an optical axis, and comprising:

• an annular structure located on an object side of the imaging lens assembly and surrounding the optical axis, and comprising:
• a first through hole disposed on an object side of the annular structure and the optical axis passing therethrough;
• a second through hole disposed on an image side of the first through hole and the optical axis passing therethrough;
• a first object-side surface disposed on an object side of the first through hole and extending from the first through hole in a direction away from the optical axis;
• a first image-side surface disposed on the image side of the first through hole, extending from the first through hole in the direction away from the optical axis, and disposed relative to the first object-side surface;
• a second frustum surface disposed on an object side of the second through hole and extending from the second through hole to the first through hole in the direction away from the optical axis, and the second frustum surface facing to the first image-side surface in a direction parallel to the optical axis;
• and
• a third frustum surface disposed on an image side of the second through hole and extending from the second through hole in a direction away from the first through hole and the optical axis;
• wherein the first image-side surface of the annular structure and the second frustum surface of the annular structure gradually taper in the direction away from the optical axis;
• wherein the second frustum surface and the third frustum surface gradually taper towards the second through hole;
• wherein the second through hole of the annular structure is a tip-end opening;
• wherein an angle between the third frustum surface and the optical axis is θ3, and the following condition is satisfied:
• 35 degrees≤θ3≤80 degrees.