Imaging lens system having retaining element and electronic device

An imaging lens system, comprising:

• an imaging lens assembly, comprising a first lens element and a second lens element;
• a spacer element, configured to maintain a distance between the first lens element and the second lens element, and the spacer element comprising:
• a connecting part, wherein the connecting part and the second lens element are connected to each other;
• and
• a supporting part, connected to the connecting part and extending from the connecting part towards an optical axis of the imaging lens assembly, wherein the first lens element is disposed on the supporting part;
• and
• a retaining element, comprising a retaining surface, wherein the retaining surface and the first lens element are abutted against each other so as to fix the first lens element to the supporting part of the spacer element;
• wherein the retaining element is disposed between the first lens element and the second lens element, and the retaining element is not in physical contact with the second lens element;
• and
• wherein an outer diameter of the first lens element is D1, an outer diameter of the second lens element is D2, and the following condition is satisfied:
• D1/D2<1.

An imaging lens system, comprising:

• an imaging lens assembly, comprising a first lens element, a second lens element and a third lens element;
• a spacer element, configured for positioning the first lens element between the second lens element and the third lens element and configured to maintain a distance between the first lens element and the second lens element and maintain another distance between the first lens element and the third lens element, and the spacer element comprising:
• a connecting part, wherein the connecting part and the second lens element are connected to each other, and the connecting part and the third lens element are connected to each other;
• and
• a supporting part, connected to the connecting part extending from the connecting part towards an optical axis of the imaging lens assembly, wherein the first lens element is disposed on the supporting part;
• and
• a retaining element, comprising a retaining surface, wherein the retaining surface and the first lens element are abutted against each other so as to fix the first lens element to the supporting part of the spacer element;
• wherein an outer diameter of the first lens element is D1, an outer diameter of the second lens element is D2, an outer diameter of the third lens element is D3, and the following conditions are satisfied:
• D1/D2<1;
• and
• D1/D3<1.