Lens assembly, camera module and electronic device

A lens assembly, having a paraxial path, and comprising:

• a carrier comprising a first end, a second end and an inner annular surface, wherein the first end surrounds the paraxial path, the second end is disposed oppositely to the first end, and an inside space is defined by the inner annular surface, which is connected between the first end and the second end;
• a plurality of optical elements arranged in the inside space along the paraxial path;
• a retaining element disposed at or adjacent to the first end and being in physical contact with the optical elements for retaining the optical elements in the inside space;
• and
• a first bonding material bonding the carrier and the retaining element;
• wherein a closed structure is located adjacent to the second end, the closed structure is formed by at least one optical element of the optical elements and the inner annular surface, the at least one optical element is in physical contact with the inner annular surface, and the inside space is closed from an outside air by the closed structure;
• wherein a first ventilation structure is located adjacent to the first end and connected between the closed structure and the outside air, the first ventilation structure is disposed on a side surface facing the optical elements of the retaining element and comprises a contact surface and a first shrunk surface, the contact surface is in physical contact with the optical elements, and the first shrunk surface is shrunk from the contact surface along a direction away from the optical elements so as to form a first air gap, which is connected between the closed structure and the outside air.