Method for passing an electrical cable through a hole and device for same

1. A method for passing an electrical cable through a hole in a housing of a lighting source device, the method comprising:

inserting a cable into the hole; wherein the cable has a tubular mushroom-shaped male member fitted thereon; wherein the male member comprises a stem with a threaded portion and a portion with an enlarged head; and wherein the male member is configured to extend through said hole with said portion with enlarged head abutting against the periphery of the hole externally to the housing and said threaded portion protruding inside the housing; and

retaining said male member in the hole by coupling with said threaded portion that protrudes inside the housing an annular female member in the form of a nut co-operating with the periphery of the hole inside said housing to counter the movement of the female member with respect to the housing; wherein at least one O-ring is disposed around the perimeter of the hole; wherein the housing comprises L-shaped engagement formations to slidably engage the annular female member; and wherein the L-shaped elements protrude from the housing in a parallel direction of travel of the tubular male member into the female member.

2. The method as claimed in claim 1 , further comprising:

coupling said female member with said threaded portion of said male member by screwing.

3. The method as claimed in claim 1 , further comprising:

providing retainer formations co-operating with the female member at the periphery of said hole inside said housing to prevent rotation thereof.

4. The method as claimed in claim 1 , further comprising:

the formation of said female member with a square shape.

5. The method as claimed in claim 1 , further comprising:

providing the periphery of said portion with enlarged head with a toothed profile in order to allow said male member to be driven in rotation.

6. The method as claimed in claim 1 , further comprising:

providing an annular sealing member in at least one position chosen from:

the side of said portion with enlarged head of the male member facing toward the periphery of said hole outside of said housing;

the side of said female member facing toward the periphery of said hole inside said housing.

7. The method as claimed in claim 1 , wherein the male member and the female member are made of a plastic material.

8. The method as claimed in claim 1 , wherein the L-shaped elements substantially extend along one or more sides of the female member in a direction perpendicular to the direction of travel of the male member into the female member.

9. A lighting source device comprising:

a tubular male member configured to be fitted onto a cable, the male member being mushroom-shaped and comprising a stem with a threaded portion and a portion with an enlarged head; wherein the male member comprises the cable; and wherein the male member is configured to be inserted into a hole;

an annular female member in the form of a nut able to be coupled with said threaded portion of the male member in order to retain the male member in the hole, the female member being configured for co-operating with the periphery of the hole inside said housing to counter the movement of the female member with respect to the housing;

at least one O-ring is disposed around the perimeter of the hole;

a housing comprising L-shaped engagement formations configured to slidably engage the annular female member; and wherein the L-shaped elements protrude from the housing in a parallel direction of travel of the tubular male member into the female member.