Lens module with auto-focusing mechanism and electronic device

1. A lens module with auto-focusing mechanism, comprising:

a plastic lens barrel comprising:

a front end portion comprising a front end surface, a front end hole and a circular wall portion, wherein the circular wall portion surrounds the front end hole and the front end hole is an aperture stop, the circular wall portion with two inclined portions, the two inclined portions are for forming a tip portion, and an acute angle between each of the inclined portions and an optical axis is greater than 0 degrees and smaller than 90 degrees;

a rear end portion comprising a rear end opening; and

an outer side portion connecting the front end portion and the rear end portion;

at least four protruding structures located on the outer side portion of the plastic lens barrel; and

a coil regulating structure located on the outer side portion of the plastic lens barrel;

a lens assembly disposed in the plastic lens barrel, and comprising a plurality of lens elements, wherein the lens elements are directly contained in the plastic lens barrel, and each of the lens elements is contacted with an inner side of the plastic lens barrel;

at least one elastic member connected to the protruding structures of the plastic lens barrel;

an auto-focusing mechanism connected to the plastic lens barrel, and comprising:

a coil being polygon; and

wherein the coil regulating structure is integrally formed with the plastic lens barrel, the coil is connected and positioned to the coil regulating structure, each of the protruding structures extending along a direction parallel to the optical axis of the lens assembly, and the plastic lens barrel is made of injection molding method;

wherein the plastic lens barrel is a non-threaded structure;

wherein the coil regulating structure is located on two sides of the coil along the direction parallel to the optical axis of the lens assembly, and the coil regulating structure is overlapped with the coil along the direction parallel to the optical axis from both of the two sides of the coil.

2. The lens module with auto-focusing mechanism of claim 1 , wherein the auto-focusing mechanism is a voice-coil motor.

3. The lens module with auto-focusing mechanism of claim 2 , wherein the coil regulating structure comprises:

at least four plane surfaces parallel to an optical axis of the lens assembly.

4. The lens module with auto-focusing mechanism of claim 3 , wherein the coil is positioned on the plane surfaces.

5. The lens module with auto-focusing mechanism of claim 3 , wherein the auto-focusing mechanism further comprises:

a field magnet assembly surrounded and adjacent to the coil.

6. The lens module with auto-focusing mechanism of claim 5 , wherein the field magnet assembly comprises:

at least four field magnet units symmetrically surrounded the coil, each of the field magnet units having an inner surface, wherein the inner surface of each of the field magnet units is parallel and corresponds to each of the plane surfaces of the coil regulating structure.

7. The lens module with auto-focusing mechanism of claim 2 , wherein the coil is octagon.

8. An electronic device, comprising:

the lens module with auto-focusing mechanism of claim 1 .

9. A lens module with auto-focusing mechanism, comprising:

a plastic lens barrel comprising:

a front end portion comprising a front end surface, a front end hole and a circular wall portion, wherein the circular wall portion surrounds the front end hole and the front end hole is an aperture stop, the circular wall portion with two inclined portions, the two inclined portions are for forming a tip portion, and an acute angle between each of the inclined portions and an optical axis is greater than 0 degrees and smaller than 90 degrees;

a rear end portion comprising a rear end opening;

an outer side portion connecting the front end portion and the rear end portion;

at least four plane surfaces located on the outer side portion of the plastic lens barrel; and

at least four protruding structures located on the outer side portion of the plastic lens barrel;

a lens assembly disposed in the plastic lens barrel, and comprising a plurality of lens elements, wherein the lens elements are directly contained in the plastic lens barrel, and each of the lens elements is contacted with an inner side of the plastic lens barrel;

at least one elastic member connected to the protruding structures of the plastic lens barrel; and

an auto-focusing mechanism connected to the plane surfaces of the plastic lens barrel;

wherein the plane surfaces are integrally formed with the plastic lens barrel, and parallel to an optical axis of the lens assembly;

wherein the protruding structures are integrally formed with the plastic lens barrel, each of the protruding structures extending along a direction parallel to the optical axis of the lens assembly, and the plastic lens barrel is made of injection molding method;

wherein the plastic lens barrel is a non-threaded structure;

wherein the plastic lens barrel further comprises a coil and a coil regulating structure, the coil regulating structure is located on two sides of the coil along the direction parallel to the optical axis of the lens assembly, and the coil regulating structure is overlapped with the coil along the direction parallel to the optical axis from both of the two sides of the coil, and the coil regulating structure comprises the four plane surfaces.

10. The lens module with auto-focusing mechanism of claim 9 , wherein the plane surfaces are equidistantly surrounded the optical axis.

11. The lens module with auto-focusing mechanism of claim 9 , wherein:

the coil connected and positioned to the plane surfaces.

12. The lens module with auto-focusing mechanism of claim 11 , wherein the coil is polygon.

13. The lens module with auto-focusing mechanism of claim 12 , wherein the coil is octagon.

14. The lens module with auto-focusing mechanism of claim 13 , wherein the auto-focusing mechanism further comprises:

a field magnet assembly surrounded and adjacent to the coil, wherein the field magnet assembly comprises at least four field magnet units symmetrically surrounded the coil.

15. The lens module with auto-focusing mechanism of claim 9 , wherein the lens module with auto-focusing mechanism comprises at least six protruding structures.

16. An electronic device, comprising:

the lens module with auto-focusing mechanism of claim 9 .