Interlock arrangement for a luminaire

1. A luminaire comprising a swivel assembly and a lamp support for connection to the swivel assembly,

the swivel assembly comprising a swivel member having an interlock element,

the lamp support comprising:

a locking arrangement comprising a deformable portion mounted on a surface of the lamp support, the locking arrangement being adapted to engage with the interlock element of the swivel assembly,

wherein the deformable portion is adapted to be movable relative to the surface of the lamp support so as to move from a first position, in which the swivel assembly is connectable to the locking arrangement so as to permit connection of the swivel member from the lamp support, to a second position, in which the locking arrangement cooperates with the interlock element to prevent removal of the swivel member from the lamp support,

wherein when the swivel assembly and the lamp support are connected, the deformable portion resiliently grips the swivel member,

wherein the lamp support further comprises an aperture adapted to at least partially permit passage of the swivel member therethrough, and

wherein unidirectional passage of the swivel member through the aperture causes the deformable portion to move from the first position to the second position.

2. The luminaire of claim 1 , wherein:

initial unidirectional passage of the swivel member through the aperture of the lamp support deforms the deformable portion to the first position; and

further unidirectional passage of the swivel member through the aperture causes the deformable portion to move to the second position.

3. The luminaire of claim 1 , wherein the aperture of the lamp support forms a passage from an exterior surface of a side of the lamp support to an interior surface of the same side of the lamp support, and the locking arrangement is positioned in contact with the interior surface of the same side of the lamp support.

4. The luminaire of claim 1 , wherein the deformable portion comprises a flexible member.

5. The luminaire of claim 1 , wherein the locking arrangement further comprises a limiting member arranged to prevent movement of the swivel member relative to the locking arrangement beyond a predetermined position.

6. The luminaire of claim 5 , wherein the limiting member comprises a rotation-restricting element adapted to cooperate with a portion of the swivel member, such that the rotation-restricting element is adapted to restrict rotation of the swivel member relative to the locking arrangement.

7. The luminaire of claim 1 , wherein the locking arrangement comprises a plurality of deformable portions, each adapted to be able to cooperate with a different, respective, interlock element of the swivel member.

8. The luminaire of claim 1 , wherein the lamp support is injection moulded.

9. A luminaire according to claim 1 , wherein the deformable portion is arranged to grip the swivel member across substantially the entire surface of the swivel member.

10. The luminaire of claim 1 , wherein the interlock element comprises an indentation.

11. The luminaire of claim 1 , wherein the swivel member is elongated.

12. The luminaire of claim 1 , wherein the swivel comprises a ball-and-socket joint.

13. The luminaire of claim 1 , wherein each of the swivel member, body member and swivel are at least partially hollow.