Lens driving apparatus

1. A lens driving apparatus comprising:

a base in which a guide member is disposed;

a lens support member comprising an installation unit disposed on one side thereof to slidingly move along the guide member, wherein at least one lens is mounted in the lens support member;

a driving structure configured to move the lens support member and comprising a lead screw;

a working member having one portion contacting the driving structure and another portion contacting one side of the installation unit; and

an elastic member for providing the installation unit with an elastic force;

wherein a predetermined space is disposed between the installation unit and the base, and wherein the installation unit is configured to be moved to the base by a means other than the driving structure.

2. The lens driving apparatus of claim 1 , wherein the working member comprises:

a clip member for contacting the lead screw; and

a contact member having one portion contacting the clip member and another portion contacting the installation unit.

3. The lens driving apparatus of claim 2 , wherein the clip member linearly moves in at least one direction on the lead screw according to the rotation of the lead screw.

4. The lens driving apparatus of claim 1 , wherein the other portion of the working member comprises a first contact surface and a second contact surface, wherein the first contact surface and the second contact surface slidingly move on the guide member, are spaced apart from each other, and face each other.

5. The lens driving apparatus of claim 4 , wherein the installation unit comprises a first installation unit surface and a second installation unit surface that are spaced apart from each other and face each other, and

wherein the first installation unit surface is disposed farther away from the base than the second installation unit surface and is disposed between the first contact surface and the second contact surface.

6. The lens driving apparatus of claim 1 , wherein the lens support member is configured to move independently from the working member when the lens support member is on the base.

7. The lens driving apparatus of claim 1 , wherein the elastic member is a compression spring.

8. The lens driving apparatus of claim 1 , wherein the elastic member is a tensile spring.

9. The lens driving apparatus of claim 1 , wherein the installation unit is configured to move upward from the base without moving the working member for a predetermined distance before contacting the working member.

10. A method of driving at least one lens, the method comprising:

if a lens support structure is above a base by a distance greater than a predetermined distance, moving a driving structure to move a working member to move an installation unit, wherein the installation unit moves the lens support structure which includes the at least one lens;

if the lens support structure is not above the base by a distance greater than a predetermined distance, moving the lens support structure to the base with another driving structure,

wherein the working member and the installation unit are slidingly attached to a guide member and wherein the working member moves the installation unit by coming into contact with and pushing the installation unit.

11. The method of claim 10 , wherein moving the driving structure comprises:

moving a lead screw that moves the driving structure to move the working member to move the installation unit, wherein the installation unit moves the lens support structure which includes the at least one lens, and wherein the driving structure moves linearly in at least one direction on the lead screw according to the rotation of the lead screw.