Lens driving device, camera module, and optical instrument

1 . A lens driving device comprising:

a housing;

a bobbin disposed in the housing;

a base spaced apart from the housing;

a first coil disposed on the bobbin;

a magnet disposed on the housing and facing the first coil;

a first substrate disposed on the base and comprising a second coil facing the magnet;

a first elastic member connecting the bobbin and the housing; and

a support member connecting the first elastic member and the first substrate,

wherein the support member comprises a wire and a buffer part formed of a material different from the wire and surrounding at least a portion of the wire,

wherein the buffer part is formed of a different material than the first elastic member,

wherein the buffer part comprises a groove recessed from an outer circumferential surface of the buffer part, and

wherein the groove of the buffer part is spaced apart from an upper end and a lower end of the buffer part.

2 . The lens driving device of claim 1 , wherein the wire is formed of a conductive material, and

wherein the buffer part is formed of a non-conductive material.

3 . The lens driving device of claim 1 , wherein the wire is formed of a metal, and

wherein the buffer part is formed of an elastomer.

4 . The lens driving device of claim 1 , wherein the buffer part comprises a first fixing part connected with the first elastic member, a second fixing part connected with the first substrate, an extension part disposed between the first fixing part and the second fixing part, and a first deformable part connecting the first fixing part and the extension part, and

wherein a diameter of the first deformable part in a direction perpendicular to an optical axis is smaller than a diameter of the first fixing part in the direction perpendicular to the optical axis by the groove of the buffer part.

5 . The lens driving device of claim 4 , wherein the buffer part comprises a second deformable part connecting the second fixing part and the extension part, and

wherein a diameter of the second deformable part in the direction perpendicular to the optical axis is smaller than a diameter of the second fixing part in the direction perpendicular to the optical axis by the groove of the buffer part.

6 . The lens driving device of claim 5 , wherein the diameter of the first fixing part, the diameter of the second fixing part, and a diameter of the extension part in the direction perpendicular to the optical axis are same as each other, and

wherein the diameter of the first deformable part is same as the diameter of the second deformable part.

7 . The lens driving device of claim 5 , wherein the first substrate comprises a hole,

wherein the second fixing part of the support member is disposed on the hole of the first substrate, and

wherein a diameter of the hole in the first substrate in the direction perpendicular to the optical axis is same as the diameter of the second fixing part of the support member.

8 . The lens driving device of claim 5 , wherein the diameter of the first deformable part is 20% to 80% of the diameter of the first fixing part.

9 . The lens driving device of claim 4 , wherein the first elastic member comprises an inner side portion coupled to the bobbin, an outer side portion coupled to the housing, a connection part connecting the inner side portion and the outer side portion, and an extension part extending from the outer side portion and coupled to the support member,

wherein the extension part of the first elastic member comprises a hole,

wherein the first fixing part of the support member is disposed on the hole of the extension part of the first elastic member, and

wherein a diameter of the hole of the extension part of the first elastic member in the direction perpendicular to the optical axis is same as the diameter of the first fixing part of the support member.

10 . The lens driving device of claim 1 , wherein the groove of the buffer part comprises a first groove adjacent to the upper end of the buffer part and a second groove adjacent to the lower end of the buffer part, and

wherein a length of each of the first groove and the second groove of the buffer part in an optical axis direction is 3% to 40% of a length of the buffer part in the optical axis direction.

11 . The lens driving device of claim 10 , wherein the length of the second groove of the buffer part in the optical axis direction is greater than the length of the first groove in the optical axis direction.

12 . The lens driving device of claim 1 , wherein the buffer part has a circular cross-section in a direction perpendicular to an optical axis.

13 . A camera device comprising:

a printed circuit board;

an image sensor disposed on the printed circuit board;

the lens driving device of claim 1 disposed on the printed circuit board; and

a lens coupled with the bobbin of the lens driving device.

14 . An optical instrument comprising:

a main body;

the camera device of claim 13 disposed on the main body; and

a display module disposed on the main body and configured to output an image photographed by the camera device.

15 . A lens driving device comprising:

a fixing member comprising a first substrate;

a housing disposed on the fixing member;

a bobbin disposed in the housing;

an elastic member connecting the bobbin and the housing; and

a support member connecting the elastic member and the fixing member,

wherein the support member comprises a wire and a buffer part comprising a columnar shape disposed to completely surround at least a portion of the wire,

wherein the wire protrudes from one end of the buffer part to be coupled to the elastic member, and protrudes from an other end of the buffer part to be coupled to the fixing member,

wherein the buffer part comprises a first fixing part connected with the elastic member, a second fixing part connected with the first substrate, an extension part disposed between the first fixing part and the second fixing part, a first deformable part connecting the first fixing part and the extension part, and a second deformable part connecting the second fixing part and the extension part,

wherein a diameter of the second deformable part in a direction perpendicular to an optical axis is smaller than a diameter of the second fixing part in the direction perpendicular to the optical axis,

wherein the first substrate comprises a hole,

wherein the second fixing part of the support member is disposed on the hole of the first substrate, and

wherein a diameter of the hole in the first substrate in the direction perpendicular to the optical axis is same as the diameter of the second fixing part of the support member.

16 . The lens driving device of claim 15 , wherein the elastic member comprises an upper elastic member and a lower elastic member disposed below the upper elastic member, and

wherein a length of the buffer part is greater than or same as a distance between the upper elastic member and the lower elastic member.

17 . The lens driving device of claim 15 , wherein the buffer part surrounds 50% or more of the wire.

18 . The lens driving device of claim 15 , wherein the wire is formed of a conductive material, and

wherein the buffer part is formed of a non-conductive material.

19 . A lens driving device comprising:

a fixing member comprising a first substrate;

a housing disposed on the fixing member;

a bobbin disposed in the housing;

an elastic member connecting the bobbin and the housing; and

a support member disposed between the elastic member and the fixing member,

wherein the support member comprises a wire and a buffer part disposed to completely surround at least a portion of the wire,

wherein, based on an optical axis direction, the buffer part has a length greater than a half of a length of the bobbin,

wherein the wire protrudes from one end of the buffer part to be coupled to the elastic member, and protrudes from the other end of the buffer part to be coupled to the fixing member,

wherein the buffer part comprises a first fixing part connected with the elastic member, a second fixing part connected with the first substrate, an extension part disposed between the first fixing part and the second fixing part, and a first deformable part connecting the first fixing part and the extension part, and

wherein a diameter of the first deformable part is 20% to 80% of a diameter of the first fixing part.

20 . The lens driving device of claim 19 , wherein the wire is formed of a conductive material, and

wherein the buffer part is formed of a non-conductive material.