US 11,899,269 B2
Imaging lens module and electronic device
Cheng-Feng Lin, Taichung (TW); Wei-Hung Weng, Taichung (TW); and Ming-Ta Chou, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Apr. 28, 2021, as Appl. No. 17/242,337.
Application 17/242,337 is a continuation of application No. 16/431,945, filed on Jun. 5, 2019, granted, now 11,022,774.
Application 16/431,945 is a continuation of application No. 16/360,159, filed on Mar. 21, 2019, granted, now 11,086,093.
Application 16/360,159 is a continuation of application No. 14/970,696, filed on Dec. 16, 2015, granted, now 10,281,676, issued on May 7, 2019.
Claims priority of application No. 104217937 (TW), filed on Nov. 9, 2015.
Prior Publication US 2021/0247585 A1, Aug. 12, 2021
Int. Cl. G02B 7/02 (2021.01); G02B 13/00 (2006.01)
CPC G02B 7/021 (2013.01) [G02B 7/022 (2013.01); G02B 13/001 (2013.01); G02B 13/0045 (2013.01)] 7 Claims
OG exemplary drawing
 
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.