Lighting device

1. A lighting device comprising:

a housing;

a coupling member coupled to the housing;

a reflector disposed between the housing and the coupling member;

a light source unit connected to the coupling member; and

an optical member connected to the light source unit,

wherein the optical member transmits a part of light emitted from the light source unit and reflects the other part of the light to the reflector,

wherein the light source unit comprises a body unit and a light emitting module disposed on the bottom surface of the body unit,

wherein the body unit comprises a first body and a second body disposed on one side of the first body,

wherein the light emitting module comprises a first light emitting module disposed on the first body and a second light emitting module disposed on the second body, and

wherein the light source unit further comprises a coupling cap coupling the first body to the second body.

2. The lighting device of claim 1 , wherein the optical member comprises a first surface disposed under the light source unit and a second surface connecting the light source unit with the first surface, wherein the first surface transmits and reflects the light emitted from the light source unit, and wherein the second surface transmits the light reflected from the first surface.

3. The lighting device of claim 2 , wherein the second surface of the optical member comprises at least one projection.

4. The lighting device of claim 3 , wherein the first surface comprises an extension part extending from both ends thereof, and wherein the extension part extends longer than the projection.

5. The lighting device of claim 1 , further comprising a protective cover between the light source unit and the optical member, wherein the optical member and the protective cover comprise at least one of a lens, a diffusion sheet and a phosphor luminescent film (PLF).

6. The lighting device of claim 1 , wherein the first body is symmetrical, wherein the first body comprises a first projection, a second projection and a lower projection, wherein the first projection projects outwardly from both upper sides of the first body, wherein the second projection projects outwardly from both lower sides of the first body, and wherein the lower projection projects downwardly from both ends of the bottom surface of the first body.

7. The lighting device of claim 6 , wherein the second projection becomes closer to the top surface of the first body the farther it is from the first body.

8. The lighting device of claim 7 , wherein the first projection is formed shorter in the side direction of the light source unit than the second projection.

9. The lighting device of claim 8 , wherein a wire connected to the light emitting module is disposed in a wire path formed by the first projection and the second projection between the plural bodies.

10. The lighting device of claim 1 , wherein the coupling member comprises an insertion groove, and wherein the light source unit further comprises a connection member coupled to the insertion groove of the coupling member.

11. The lighting device of claim 10 , wherein the coupling member further comprises a first connection terminal in the insertion groove, wherein the light source unit further comprises a second connection terminal, and wherein the connection member of the light source unit is coupled to the insertion groove of the coupling member, so that the first connection terminal is electrically connected to the second connection terminal.

12. The lighting device of claim 10 , wherein the light source unit comprises a body unit and a light emitting module, wherein the body unit comprises a first body and a second body, wherein the connection member comprises a first connection member disposed on the first body and a second connection member disposed on the second body, and wherein the lighting device further comprises a spring between the first connection member and the second connection member.

13. A lighting device comprising:

a housing which includes a coupler; and

a light source unit which extends in one direction of the housing and is coupled to the housing by a coupler corresponding to the coupler of the housing,

wherein the light source unit comprises at least one body unit and a light emitting module disposed on the bottom surface of the body unit,

wherein the body unit comprises a first body and a second body disposed on one side of the first body,

wherein the light emitting module comprises a first light emitting module disposed on the first body and a second light emitting module disposed on the second body, and

wherein the light source unit further comprises a coupling cap coupling the first body to the second body.

14. The lighting device of claim 13 , further comprising at least one reflector which is disposed between the housing and the light source unit, and further comprising an optical member which is coupled to the light source unit and transmits a part of light emitted from the light emitting module and reflects the other part of the light to the housing.

15. The lighting device of claim 13 , wherein, when the coupler is a clip, the clip is disposed on the inner upper surface of the housing and has an opening, and wherein the light source unit is inserted into the opening of the clip and is coupled to the housing.

16. The lighting device of claim 13 , wherein, when the coupler is a screw, at least one hole is formed on the top surface of the housing in one direction and at least one groove is formed on the top surface of the body unit, and wherein the screw passes through the hole of the housing and is coupled to the groove of the body unit, so that the light source unit is coupled to the housing.

17. The lighting device of claim 13 , wherein the body unit comprises at least one body, and wherein the body is symmetrical, and wherein the lighting device further comprises a coupling cap coupling both sides of the bodies.

18. A lighting device comprising:

a housing;

a light source unit comprising a body unit disposed under the housing and a light emitting module disposed under the body unit; and

a reflector disposed between the housing and the body unit,

wherein the body unit comprises a first body including a first bottom surface and a second body including a second bottom surface,

wherein the light emitting module comprises a first light emitting module disposed on the first bottom surface and a second light emitting module disposed on the second bottom surface.

19. The lighting device of claim 18 , further comprising a coupling cap coupling both ends of the first body and the second body.

20. The lighting device of claim 18 , further comprising a connection member disposed between the housing and the light source unit, wherein the first body includes a first top surface and the second body includes a second top surface, wherein the connection member comprises a first connection member disposed on the first top surface and a second connection member disposed on the second top surface, and wherein the lighting device further comprises a spring between the first connection member and the second connection member.