Zoom lens module
Disclosed herein is a zoom lens module that may include a first zoom lens group on an optical axis, a second zoom lens group on the optical axis, and a first driving unit configured to move at least one of the first zoom lens group and the second zoom lens group to vary a distance between the first zoom lens group and the second zoom lens group. In the disclosure, the first driving unit may include a first driving motor, a screw member on a rotary shaft of the first driving motor, and a first wire member connecting the screw member to one of the first zoom lens group and the second zoom lens group.
1. A zoom lens module comprising:
a first zoom lens group on an optical axis;
a second zoom lens group on the optical axis; and
a first driving unit configured to move at least one of the first zoom lens group and the second zoom lens group to vary a distance between the first zoom lens group and the second zoom lens group,
wherein the first driving unit includes a first driving motor, a screw member on a rotary shaft of the first driving motor, and a first wire member connecting the screw member to one of the first zoom lens group and the second zoom lens group.
2. The zoom lens module according to claim 1 , wherein the first wire member is wound on the screw member to move at least one of the first zoom lens group and the second zoom lens group when the rotary shaft is rotated.
3. The zoom lens module according to claim 2 , wherein
each of the first zoom lens group and the second zoom lens group includes a barrel receiving at least one lens, and
the first wire member is connected to one of the barrels of the first zoom lens group and the second zoom lens group.
4. The zoom lens module according to claim 3 , wherein the first driving unit further includes an elastic member elastically supporting the barrel connected to the first wire member.
5. The zoom lens module according to claim 1 , wherein the first driving unit is configured to move both of the first zoom lens group and the second zoom lens group.
6. The zoom lens module according to claim 5 , wherein
the first driving unit further includes a second wire member, and
the first wire member connects the first zoom lens group to the screw member and the second wire member connects the second zoom lens group to the screw member.
7. The zoom lens module according to claim 6 , wherein the first wire member and the second wire member are wound on the screw member to move the first zoom lens group and the second zoom lens group when the first rotary shaft is rotated.
8. The zoom lens module according to claim 7 , wherein the screw member includes
a first spiral groove on an outside surface of the screw member, the first spiral groove configured to engage the first wire member, and
a second spiral groove on the outside surface of the screw member, the second spiral groove configured to engage the second wire member.
9. The zoom lens module according to claim 8 , wherein the first spiral groove and the second spiral groove have different leads.
10. The zoom lens module according to claim 6 , wherein
each of the first zoom lens group and the second zoom lens group includes a barrel receiving at least one lens, and
the first wire member is connected to the barrel of the first zoom lens group and the second wire member is connected to the barrel of the second zoom lens group.
11. The zoom lens module according to claim 10 , further comprising:
elastic members connected to the barrels of the first zoom lens group and the second zoom lens group to elastically support the barrels.
12. The zoom lens module according to claim 1 , further comprising:
a second driving unit, wherein the first driving unit is configured to move only one of the first zoom lens group and the second zoom lens group and the second driving unit is configured to move the other of the first zoom lens group and the second zoom lens group.
13. The zoom lens module according to claim 12 , wherein
each of the first zoom lens group and the second zoom lens group includes a barrel receiving at least one lens and one of the barrels includes a rotating cam boss, and
the second driving unit includes a second driving motor and a rotating cam attached to a rotary shaft of the second driving motor, the rotating cam being configured to rotate as the rotary shaft of the second driving unit rotates and being further configured to engage the rotating cam boss.
14. The zoom lens module according to claim 13 , wherein the first wire member is wound on the screw member.
15. The zoom lens module according to claim 12 , wherein the first wire member is wound on the screw member.
16. The zoom lens module according to claim 12 , wherein
each of the first zoom lens group and the second zoom lens group includes a barrel receiving at least one lens and one of the barrels includes a rotating cam boss,
the second driving unit includes a second driving motor and a rotating cam attached to a rotary shaft of the second driving motor, the rotating cam being configured to rotate as the rotary shaft of the second driving unit rotates and being further configured to engage the rotating cam boss, and
the first wire member is attached to the barrel that does not include the rotating cam boss.
17. The zoom lens module according to claim 16 , wherein the first driving unit further includes an elastic member elastically supporting the barrel connected to the first wire.