Lens barrel assembly and lens assembly including the same

A lens assembly, comprising:

• a first lens barrel including a peripheral wall defining a receiving space and having a first end portion, a second end portion opposite to said first end portion, and a plurality of cam slots extending between said first end portion and said second end portion, each of said cam slots being communicated with said receiving space, and defining two opposite guiding walls;
• a second lens barrel disposed slidably in said receiving space of said first lens barrel, and including an annular body, and a plurality of cam followers mounted on said annular body, each of said cam followers having a shank portion, a head portion, and a rolling member disposed around said shank portion and stopped by said head portion, said shank portion extending radially and outwardly from said annular body and through a corresponding one of said cam slots, said rolling member having a spherical outer surface for contacting said guiding walls of one of said cam slots;
• and
• a lens member including a lens mounted in said annular body of said second lens barrel.