LENS MODULE
The present disclosure relates to the field of optical lenses and discloses a lens module. The lens module includes a lens barrel, a first lens disposed on an object side of the lens barrel, a fixing part for pressing and holding the first lens on the lens barrel from an object side of the first lens, and a seal ring disposed between the lens barrel and the first lens. The seal ring includes a top surface abutting against the first lens and a bottom surface abutting against the lens barrel. The top surface is a smooth surface. The lens module provided by the present disclosure has a relatively higher reliability and an excellent sealing property.
1 . A lens module, comprising:
a lens barrel;
a first lens disposed on an object side of the lens barrel;
a fixing part for pressing and holding the first lens on the lens barrel from an object side of the first lens; and
a seal ring disposed between the lens barrel and the first lens,
wherein the seal ring comprises a top surface abutting against the first lens and a bottom surface abutting against the lens barrel, the top surface being a smooth surface.
2 . The lens module as described in claim 1 , wherein the bottom surface is a smooth surface.
3 . The lens module as described in claim 2 , wherein the lens barrel comprises an object side surface close to the object side and defining a light through hole, and a lens barrel inner wall around an optical axis and defining a receiving space,
the object side surface is provided with a receiving portion, and the seal ring is received in the receiving portion.
4 . The lens module as described in claim 3 , wherein the receiving portion is annular around the optical axis of the lens module.
5 . The lens module as described in claim 4 , wherein the receiving portion is a groove spaced apart from the lens barrel inner wall and isolated from the receiving space, the groove comprises an inner wall surface close to the optical axis of the lens module, an outer wall surface facing away from the optical axis, and a groove bottom surface connecting the inner wall surface with the outer wall surface.
6 . The lens module as described in claim 5 , wherein the seal ring is spaced apart from the inner wall surface and the outer wall surface, and abuts against the groove bottom surface.
7 . The lens module as described in claim 5 , wherein the seal ring abuts against the inner wall surface, the outer wall surface and the groove bottom surface.
8 . The lens module as described in claim 4 , wherein the receiving portion is a recess reaching the lens barrel inner wall and communicating with the receiving space, the recess comprises a side wall surface extending from an edge, close to the optical axis, of the object side surface towards an image side, and a recess bottom surface extending from an edge, close to the image side, of the side wall surface in a direction facing towards the optical axis until reaching the lens barrel inner wall.
9 . The lens module as described in claim 8 , further comprising a second lens disposed in the receiving space and located on an image side of the first lens, wherein a periphery of the second lens directly faces the recess, and the seal ring is spaced apart from the side wall surface and the periphery of the second lens and abuts against the recess bottom surface.
10 . The lens module as described in claim 8 , further comprising a second lens disposed in the receiving space and located on an image side of the first lens, wherein a periphery of the second lens directly faces the recess, and the seal ring abuts against the side wall surface, the periphery of the second lens and the recess bottom surface.