US 11,693,205 B2
Plastic lens barrel, camera module and electronic device
Chun-Hua Tsai, Taichung (TW); Ming-Ta Chou, Taichung (TW); and Lin-An Chang, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Oct. 12, 2021, as Appl. No. 17/498,883.
Application 17/498,883 is a continuation of application No. 16/867,604, filed on May 6, 2020, granted, now 11,169,352.
Claims priority of provisional application 62/848,068, filed on May 15, 2019.
Claims priority of application No. 108140864 (TW), filed on Nov. 11, 2019.
Prior Publication US 2022/0026662 A1, Jan. 27, 2022
Int. Cl. G02B 7/02 (2021.01)
CPC G02B 7/02 (2013.01) 23 Claims
OG exemplary drawing
 
1. A plastic lens barrel, having an inner space for accommodating an imaging lens assembly, the imaging lens assembly having an optical axis, the plastic lens barrel comprising:
an object-side portion located close to an object side of the plastic lens barrel, wherein the object-side portion comprises an object-side opening and an object-side annular surface, and the object-side annular surface surrounds the object-side opening and faces toward the object side;
an image-side portion located close to an image side of the plastic lens barrel and comprising an image-side opening; and
a tube-shaped portion surrounding the optical axis, wherein the tube-shaped portion is connected between the object-side portion and the image-side portion, and configured to define the inner space;
wherein the object-side annular surface comprises a groove structure area, the groove structure area comprises a plurality of groove structures, and the groove structures are disposed in at least one of an arranging manner and an extending manner along a sagittal direction away from the optical axis;
wherein a maximum outer diameter of the groove structure area is φo, a maximum outer diameter of the plastic lens barrel is φmax, a minimum inner diameter of the groove structure area is φi, a diameter of the object-side opening of the plastic lens barrel is φmin, and the following conditions are satisfied:
0.2<φo/φmax<0.9; and
0.75<φmin/φi≤1.0.