Patent ID: 11899269
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An imaging lens module, comprising:
a plastic barrel and an optical lens assembly, wherein the optical lens assembly is disposed in the plastic barrel and comprises a plurality of lens elements, and the plastic barrel is for holding at least one lens element and comprises:
an object-end portion, comprising:
an object-end hole;
an image-end portion;
an inner tube portion connecting the object-end portion and the image-end portion, and comprising:
a plurality of inclined surfaces, wherein each of the inclined surfaces has an angle with a central axis of the plastic barrel; and
a plurality of protrusions disposed on the object-end portion, wherein the protrusions are regularly arranged around the object-end hole of the plastic barrel, each of the protrusions is strip-shaped and extends away from the object-end hole, and each of the protrusions does not have contact with the at least one lens element;

wherein the protrusions and the plastic barrel are formed integrally, and a number of the protrusions is greater than or equal to 80, and smaller than or equal to 800,
wherein a width of each of the protrusions in a circumferential direction of the plastic barrel is w, and the following condition is satisfied:

0.1 mm<w<0.05 mm.