Plastic optical lens assembly, imaging lens module and electronic device

A plastic optical lens assembly, comprising:

• a first lens element comprising a first surface, wherein the first surface comprises:
• a first optical effective portion;
• and
• a first peripheral portion surrounding the first optical effective portion, wherein the first peripheral portion comprises a first spacing section and a first engaging structure, and the first spacing section is located between the first optical effective portion and the first engaging structure;
• a second lens element comprising a second surface, wherein the second surface comprises:
• a second optical effective portion disposed correspondingly to the first optical effective portion;
• and
• a second peripheral portion surrounding the second optical effective portion, wherein the second peripheral portion comprises a second spacing section and a second engaging structure, the second spacing section is located between the second optical effective portion and the second engaging structure, the first engaging structure is engaged with the second engaging structure for aligning the first optical effective portion with the second optical effective portion, and a reference space is formed between the first spacing section and the second spacing section;
• and
• a cementing glue coating being at least disposed between the first optical effective portion and the second optical effective portion, and the cementing glue coating cementing the first lens element and the second lens element;
• wherein the first engaging structure comprises a first conical surface and a first abutting area, wherein the first abutting area is perpendicular to an optical axis of the plastic optical lens assembly and is farther away from the first optical effective portion than the first conical surface is thereto;
• wherein the second engaging structure comprises a second conical surface and a second abutting area, wherein the second abutting area is perpendicular to the optical axis and is farther away from the second optical effective portion than the second conical surface is thereto, and the first conical surface is contacted with the second conical surface, the first abutting area is contacted with the second abutting area;
• wherein an angle between the first conical surface and the first abutting area is θ, and the following condition is satisfied:
• 90 degrees≤θ≤130 degrees.