Optical imaging lens

An optical imaging lens, from a first side to a second side along an optical axis, sequentially comprising:

• a fixing ring, a barrel, and a plurality of lens elements arranged in the barrel;
• wherein the barrel includes a front end close to the first side and a rear end close to the second side;
• the front end includes a barrel first-side opening, the rear end includes a barrel second-side opening, a maximum inner diameter of the barrel first-side opening is larger than a maximum inner diameter of the barrel second-side opening;
• the front end of the barrel includes four vertical wall parts and four circular arc wall parts, the circular arc wall parts and the vertical wall parts are spaced apart from each other and symmetrically arranged;
• each of the vertical wall parts includes a groove structure along an optical axis direction, the groove structure includes a bottom surface and two inclined planes, wherein the conditions of 100 degrees≤θ≤130 degrees, 0.3 mm≤Tsw≤0.6 mm, and 1.0≤Tsw/Dg≤2.0 are satisfied, wherein θ is an angle between the bottom surface and the inclined planes, Tsw is a minimum thickness of the vertical wall part in a radial direction, Dg is the depth of the groove structure in the optical axis direction;
• the fixing ring includes four protruding structures in the optical axis direction, the protruding structures of the fixing ring can complement the groove structures of the barrel to form an alignment structure.