An image capturing device , comprising: an imaging unit comprising: a housing that comprises an inner surface , wherein the inner surface of the housing defines a lens channel , wherein the inner surface of the lens channel defines: a helical step that protrudes outwardly from the inner surface into the lens channel, wherein the helical step is angled at a first predetermined pitch, and a glue pocket , in the lens channel, which extends from the inner surface of the lens channel to an outer surface of the housing such that a first edge surface , defining a portion of a periphery of the glue pocket, is parallel with a portion of the helical step; and a lens barrel received in the lens channel, the lens barrel comprising an outer surface that defines: a cam that protrudes from the outer surface of the lens barrel, wherein the cam abuts the helical step, and a helical rib that protrudes from the outer surface of the lens barrel, wherein the cam has a first end and a second end , wherein the first end of the cam abuts the helical step, and wherein the helical rib intersects with the cam at the second end of the cam, wherein the helical rib is angled at a second predetermined pitch, and wherein the first predetermined pitch of the helical step is the same as the second predetermined pitch of the helical rib. a housing that comprises an inner surface , wherein the inner surface of the housing defines a lens channel , wherein the inner surface of the lens channel defines: a helical step that protrudes outwardly from the inner surface into the lens channel, wherein the helical step is angled at a first predetermined pitch, and a glue pocket , in the lens channel, which extends from the inner surface of the lens channel to an outer surface of the housing such that a first edge surface , defining a portion of a periphery of the glue pocket, is parallel with a portion of the helical step; and a helical step that protrudes outwardly from the inner surface into the lens channel, wherein the helical step is angled at a first predetermined pitch, and a glue pocket , in the lens channel, which extends from the inner surface of the lens channel to an outer surface of the housing such that a first edge surface , defining a portion of a periphery of the glue pocket, is parallel with a portion of the helical step; and a lens barrel received in the lens channel, the lens barrel comprising an outer surface that defines: a cam that protrudes from the outer surface of the lens barrel, wherein the cam abuts the helical step, and a helical rib that protrudes from the outer surface of the lens barrel, wherein the cam has a first end and a second end , wherein the first end of the cam abuts the helical step, and wherein the helical rib intersects with the cam at the second end of the cam, wherein the helical rib is angled at a second predetermined pitch, and wherein the first predetermined pitch of the helical step is the same as the second predetermined pitch of the helical rib. a cam that protrudes from the outer surface of the lens barrel, wherein the cam abuts the helical step, and a helical rib that protrudes from the outer surface of the lens barrel, wherein the cam has a first end and a second end , wherein the first end of the cam abuts the helical step, and wherein the helical rib intersects with the cam at the second end of the cam, wherein the helical rib is angled at a second predetermined pitch, and wherein the first predetermined pitch of the helical step is the same as the second predetermined pitch of the helical rib. <EOS>