IT202200027366A1 - RECESSED LIGHTING DEVICE AND ITS INSTALLATION METHOD. - Google Patents

Description

RECESSED LIGHTING DEVICE AND RELATED

INSTALLATION METHOD

The present invention relates to a recessed lighting device and to the relative installation method.

Nowadays, in particular, but not only, in the domestic building sector, it is common to fix to walls and ceilings, at a certain distance from them, a panel of plasterboard, wood, or other building material, in order, for example, to meet certain aesthetic needs, and/or to cover such walls or ceilings with a sound-absorbing and/or sound-insulating and/or fire-resistant and/or thermally insulating material and/or to house, in the space created between the panel and the ceiling or wall, one or more technical systems, such as electrical, hydraulic, air conditioning systems, etc.

In particular, nowadays it is common to embed lighting elements, generally called "spotlights", in such panels, in such a way that the technical components (power supply, electric cables, etc.) of the same are positioned in the space created between the panel and the ceiling or wall (and therefore hidden from view), and that the lighting element (for example a light bulb, an LED, an optical diffuser behind which an LED is placed) is visible from outside the space, so as to be able to illuminate the room in which the panel is installed.

In particular, there are both spotlights that, once installed in the panel, protrude from it with their perimeter edge, and spotlights that, once recessed, do not protrude from the panel (or in other words are flush with it); the second type of spotlight is preferable, as it has less of an impact on the overall aesthetics of the panel, and also reduces the risk of dust or dirt depositing on the protruding edge of the spotlight, or between this edge and the panel.

The well-known type of spotlights, which once recessed do not protrude from the panel, however, have the drawback that their assembly is rather complicated, and requires drilling in the panel, in addition to the hole for recessing the spotlight, additional holes for the spotlight retaining screws, which must then be covered with stucco and painted so as not to be visible from inside the room in which the panel is installed.

Furthermore, if you want to remove the spotlight, for example to replace it with another spotlight model, you need to remove the previously fixed screws, and then proceed to cover the holes for them again with stucco and paint.

The main task of this invention is to enable a lighting device to be installed in a ceiling or wall covering panel easily and quickly.

Within the scope of this task, an object of the present invention is to be able to install the lighting device in the panel without the need to make any other holes in the panel other than the one in which the lighting device itself is positioned.

Another purpose of the invention is to allow the lighting device to be removed and replaced easily and quickly, and without necessarily having to repaint the panel after removing the lighting device.

The task and purposes according to the present invention are achieved by a lighting device which comprises:

- a support plate, shaped like an open ring in plan, so that it can be inserted, starting from one of its free ends, into a hole made in a panel fixed at a predetermined distance from a ceiling or wall, so as to define a space between the panel and the ceiling or wall, such support plate comprising a first face which can be fixed, concentrically to the hole, to an internal surface of the panel facing towards the inside of the space;

- a support bridge having a base from which two or more arms protrude which are fixed or fixable, with their distal ends, to a second face of the support plate, facing away from the first face;

- a box-shaped body, shaped in such a way that it can be positioned, at least partially, between the arms of the support bridge, which has a first end, open, and comprises, at a second end thereof, facing the first end, a light source arranged in such a way as to be able to emit light outside the box-shaped body through the first end, such box-shaped body comprising first fixing means capable of being removably fixed to corresponding second fixing means associated with the base of the support bridge, thus removably fixing the box-shaped body to the base of the support bridge.

The task and purposes of the invention are also solved by a method of installing a lighting device according to the invention, which comprises the following steps:

(a) drilling a hole in a panel fixed at a predetermined distance from a ceiling or wall, so as to define a space between the panel and the ceiling or wall;

(b) insert the support plate of the lighting device into the hole, starting from one free end of this support plate;

(c) fix, by gluing, the first face of the support plate, concentrically to the hole, to an internal surface of the panel facing towards the inside of the compartment;

(d) insert the support bridge into the hole and fix the distal ends of the arms to the second face of the support plate;

(e) electrically connect the light source to the appropriate power cables located inside the compartment;

(f) insert the box body into the hole, so as to position it, at least partially, between the arms of the support bridge;

(g) secure the first fixing means of the box body to the second fixing means present in the base of the support bridge, thus removably fixing the box body to the base of the support bridge.

Other advantageous features of the invention are reported in the dependent claims.

The characteristics and advantages of this invention will become more evident from the following description, which is by way of example and not limiting, referring to the attached schematic drawings in which:

- Figure 1 is a perspective view of an advantageous embodiment of a lighting device according to the invention;

- Figure 2 is a perspective view of a support base of the lighting device of Figure 1;

- Figure 3 is a perspective view of a support bridge of the lighting device of Figure 1;

- figures 4 and 5 are two perspective views, from two different angles, of a box-shaped body of the lighting device of figure 1;

- figure 6 is a schematic sectional view of a panel fixed to a ceiling, and of the space defined between them;

- Figures 7 to 14 are perspective views of the various installation stages of the lighting device in Figure 1.

With reference to the attached figures, the number 1 indicates overall the lighting device according to the invention, which can be installed (or in jargon "recessed"), in a hole 2 obtained in a panel 3 fixed at a predetermined distance from a ceiling or wall 4, so as to define a space 5 between said panel 3 and said ceiling or wall 4.

Advantageously, the panel 3 can be fixed to the ceiling or wall 4 using special brackets or frames, not illustrated in the attached figures.

In the example illustrated in the attached figures, the panel 3 is fixed to a ceiling 4 but, according to the invention, the panel 3 can be fixed to any wall, for example a side wall, or even a back wall (for example the floor), of a room (for example the room of a house).

Advantageously, panel 3 is flat.

Advantageously, panel 3 is made of plasterboard, or wood, or a combination of these materials, or other construction materials.

In the example illustrated in the attached figures, hole 2 is circular, but according to the invention hole 3 can have any shape, for example it can be square, polygonal, etc.

The lighting device 1 comprises a support plate 6, shaped in plan like an open ring, for example, as in the advantageous embodiment illustrated in the attached figures, shaped in plan substantially like a "C"; other conformations are however contemplated in the invention, provided that the ring is open, and can therefore be inserted into a hole 2 with a diameter smaller than the internal diameter of the open ring, starting from one of the two free ends 7a, 7b of this open ring.

The support plate 6 comprises a first face 8, preferably flat or substantially flat, which can be fixed, advantageously by gluing, concentrically to the hole 2, to an internal surface 9 of the panel 3 facing towards the inside of the compartment 5.

The support plate 6 comprises a second face 10, facing oppositely to the first face 8.

Advantageously, the support plate 6 is made of plastic, or metal, or a combination of these materials; other materials are however possible.

The lighting device 1 further comprises a support bridge 11, made for example of metal, such as iron, steel, or other material.

The support bridge 11 has a base 12 from which two or more (preferably only two) arms 13a, 13b protrude, which are fixed or fixable, with their distal ends 14a, 14b, to the second face 10 of the support plate 6.

Advantageously the base 12 is flat, or substantially flat.

Advantageously, as in the example illustrated in the attached figures, the arms 13a, 13b diverge from each other as they move away from the base 12; in other advantageous embodiments, not illustrated, the arms 13a, 13b are parallel or substantially parallel to each other.

In an advantageous embodiment, the arms 13a, 13b can be elastically moved closer together.

Advantageously, the distal ends 14a, 14b of the arms 13a, 13b are bent, preferably approximately perpendicularly, with respect to the respective arms 13a, 13b so that, when the support bridge 11 is fixed to the support plate 6, they are parallel or substantially parallel to the second face 10 of the support plate 6.

Advantageously, the distal ends 14a, 14b of the arms 13a, 13b can be fixed to the second face 10 of the support plate 6 by means of hooking and centering means 15, preferably magnetic and/or interlocking.

In an advantageous embodiment, such coupling and centering means 15 comprise coupling and centering magnets 16a, 16b, preferably fixed to the support plate 6; preferably, in the case where there are two arms 13a, 13b, the coupling and centering magnets 16a, 16b are preferably two, and are preferably positioned in diametrically opposite positions with respect to the support plate 6.

These coupling and centering magnets 16a, 16b are arranged on the support plate 6 in such a way that the distal ends 14a, 14b of the support bridge 11, which in this advantageous example are advantageously made of magnetic or ferromagnetic material, or comprise inserts, not illustrated, in such material, interact magnetically respectively with one of these coupling and centering magnets 16a, 16b, remaining magnetically bound to them, so as to hook the support bridge 11 to the second face 10 of the support plate 6, in a predefined position (thus achieving, in addition to the fixing, also the centering of the support bridge 11 with respect to the support plate 6).

In a further advantageous embodiment, not illustrated, the coupling and centering magnets 16a, 16b are provided on the distal ends 14a, 14b of the arms 13a, 13b, and the inserts in magnetic or ferromagnetic material, not illustrated, are fixed to the second face 10 of the support plate 2 in such a way as to interact magnetically with one of the coupling and centering magnets 16a, 16b respectively, and to magnetically constrain the support bridge 11 to the second face 10 of the support plate 6, in a predefined position (thus achieving, in addition to the fixing, also the centering of the support bridge 11 with respect to the support plate 6).

In advantageous embodiments, the coupling and centering means 15 comprise, in addition to or as an alternative to the coupling and centering magnets 16a, 16b, seats 17a, 17b, provided on the second face 10 of the support plate 6, advantageously positioned and shaped in such a way as to accommodate inside them respectively one of the distal ends 14a, 14b of the arms 13a, 13b, thus preventing rotation, and preferably also separation, of the support bridge 11 with respect to the support plate 6.

In advantageous embodiments, such as the one illustrated in the attached figures, the coupling and centering magnets 16a, 16b are positioned at the bottom of the seats 17a, 17b respectively.

In the advantageous embodiment illustrated in the attached figures, the distal ends 14a, 14b are advantageously shaped in plan approximately like a "brace", and the seats 17a, 17b are shaped counter-to-these distal ends 14a, 14b respectively, so that the latter, once inserted into the respective seats 17a, 17b, cannot rotate with respect to the support plate 6; in this advantageous embodiment, the exit of the distal ends 14a, 14b in a direction perpendicular to the plane of the support plate 6 is prevented by the magnetic interaction between the coupling and centering magnets 16a, 16b, present respectively on the bottom of the seats 17a, 17b, and the respective distal ends 14a, 14b. distal 14a, 14b, which are made of magnetic material or have inserts, not illustrated, in magnetic material.

In other advantageous embodiments, not illustrated, the distal ends 14a, 14b of the arms 13a, 13b and the respective seats 17a, 17b are configured (for example positioned and shaped) in such a way that the distal ends 14a, 14b can be constrained, advantageously in a removable manner, by interlocking and/or snapping, within the respective seats 17a, 17b, for example, but not necessarily, after having previously elastically brought the arms 13a, 13b closer together (in the advantageous case in which this is possible) to allow the insertion of the distal ends 14a, 14b into the respective seats 17a, 17b.

The lighting device 1 further comprises a box-shaped body 18, shaped in such a way that it can be positioned, at least partially, between the arms 13a, 13b of the support bridge 11.

In advantageous embodiments, such as the one illustrated in the attached figures, the box-shaped body 18 has a truncated conical or substantially truncated conical shape; other shapes, for example cylindrical, parallelepiped, prismatic, cubic, are however contemplated in the invention.

Advantageously, the box-like body 18 may be made of plastic, metal, or another material or combination of materials.

The box-shaped body 18 has a first open end 19, and comprises, at a second end 20, facing the first end 19, a lighting source 21 arranged in such a way as to be able to emit light outside the box-shaped body 18 through the first end 19.

Advantageously, the light source 21 may be or comprise a light bulb, one or more LEDs (light emitting diodes), an optical diffuser 22 behind which one or more LEDs are arranged, etc., and may or may not be equipped with a special integrated electronic control device, not illustrated.

Advantageously, the power source is equipped with special electrical contacts, not illustrated, for its electrical connection to an electrical power source, for example the electrical system of the building where the lighting device 1 is installed.

The box-shaped body 18 comprises first fastening means 23 suitable for removably fixing to corresponding second fastening means 24 associated with the base 12 of the support bridge 11, thus removably fixing the box-shaped body 18 to the base 12 of the support bridge 11.

In an advantageous embodiment, such as that illustrated in the attached figures, the first fastening means 23 and the second fastening means 24 are of the magnetic type.

For example, the first fixing means 23 may advantageously comprise a first magnetic element 25 (for example a magnet, or a ferromagnetic element), fixed to the second end 20 of the box-shaped body 18, preferably on the external surface of such second end 20, facing in use, towards the base 12 of the support bridge 11.

In other advantageous embodiments, not illustrated, the first magnetic element 25 may be incorporated into the second end 20 of the box body 18; for example, in the advantageous case in which the box body 18 is made of injection-molded plastic, the box body 18 may be over-injected onto the first magnetic element 25 during the molding of the box body 18.

Advantageously, in the case where the first fastening means 23 are of the magnetic type, the second fastening means 24 are also of the magnetic type and are configured so that they can be magnetically fixed, in a removable manner, to the first fastening means 23; in this case, the second fastening means 24 can advantageously comprise a second magnetic element 26, configured so that they can be magnetically fixed to the first magnetic element 25 when such second magnetic element 26 is brought to a certain distance from the first magnetic element 25 (for example in contact with it).

The second magnetic element 26 may be, for example, a magnet (for example in the advantageous case in which the first magnetic element 25 is a ferromagnetic element, or a magnet oriented with its magnetic poles in such a way as to attract the second magnetic element 26 when the second end 20 of the box-shaped body 18 faces the base 12), or, in the advantageous case in which the first magnetic element 25 is a magnet, the second magnetic element 26 may be a magnet (oriented with its magnetic poles in such a way as to attract the first magnetic element 25 when the second end 20 of the box-shaped body 18 faces the base 12) or a ferromagnetic element.

In an advantageous embodiment, such as that illustrated in the attached figures, the first fastening means 23 may comprise means for centering the second magnetic element 26 with respect to the first magnetic element 25, such as for example a flange 23a, preferably made of non-magnetic material, advantageously arranged concentrically with respect to the first magnetic element 25 and shaped in such a way as to define a seat 230a, substantially counter-shaped, in plan, with respect to the second magnetic element 26 (so as to be able to accommodate the latter, centering it with respect to the first magnetic element 25), on the bottom of which the first magnetic element 25 is positioned.

In other advantageous embodiments, not illustrated, the first fastening means 23 and the second fastening means 24 can be interlocking and/or snap-fit.

Advantageously, the second fastening means 23, for example the second magnetic element 25, can be fixed to the base 12 at a predetermined distance from such base 12; in an advantageous embodiment, not illustrated, such predetermined distance is fixed, and cannot be modified, so that the distance between the box-like body 18 and the base 12 is fixed.

In another advantageous embodiment, such as that illustrated in the attached figures, the lighting device 1 comprises means 27 for adjusting the distance between the first end 19 of the box-shaped body 18 and the base 12 of the support bridge 11 when the box-shaped body 18 is fixed to the base 12.

In an advantageous embodiment, such as that illustrated in the attached figures, the adjustment means 27 comprise a spacer element 28, with adjustable length, which connects the base 12 of the support bridge 11 to the second fixing means 24.

Advantageously, such spacer element 28 comprises a hollow and internally threaded cylinder 29, fixed to the base 12, into which a threaded pin 30 is screwed, to the free end of which the fastening means are fixed, for example the second magnetic element 26.

By rotating the threaded pin 30 around its axis of rotation, it enters or exits, by screwing/unscrewing, into/from the cylinder 29, thus allowing the distance between the second fastening means 24 and the base 12 to be adjusted, and therefore the distance between the first end 19 of the box-shaped body 18 and the base 12 of the support bridge 11.

Advantageously, as for example in the advantageous embodiment illustrated in the attached figures, the box-shaped body 18 comprises, on its external lateral surface 31, a gasket 32 suitable for engaging with the internal edge 33 of the hole 2 obtained in the panel 3 in which the lighting device 1 is installed (or in jargon ?recessed?), so as to compensate for any play between the external lateral surface 31 and the internal edge 33.

Advantageously, the lighting device 1 comprises a heat sink 34, fixed to the box-shaped body 18, preferably at its second end 20, to dissipate the heat produced by the lighting source 21, and shaped in such a way that it can be arranged, at least partially, between the arms 13a, 13b of the support bridge 11 when the box-shaped body 18 is positioned between them.

Advantageously, the heatsink 34 is made of aluminum, or other metal capable of effectively dissipating heat.

The lighting device 1 can be installed (or in jargon ?recessed?) in a panel 3 fixed at a predetermined distance from a ceiling or wall 4 so as to define a space 5 between such panel 3 and such ceiling or wall 4, according to the installation method described below.

This method according to the invention provides for a first phase (illustrated schematically in figure 7) in which, for example by means of a saw 35 or other cutting device, a hole 2 of appropriate dimensions (advantageously with a diameter smaller than the internal diameter of the support plate 6) is obtained in the panel 3.

The method therefore involves (figure 8) the step of inserting the support plate 6 of the lighting device 1 into the hole 2, starting from one of the two free ends 7a or 7b of this support plate 6.

The method therefore involves (figure 9) the phase of fixing, by gluing, the first face 8 of the support plate 6, concentrically to the hole 2, to the internal surface 9 of the panel 3 facing towards the inside of the compartment 5.

Advantageously, the diameter of the hole 2 is smaller than the internal diameter of the support plate 6.

At this point the method involves inserting the support bridge 11 into the hole 2 (figure 10) and fixing the distal ends 14a, 14b of the arms 13a, 13b to the second face 10 of the support plate 6 (figure 11).

The method therefore involves the phase of electrically connecting the lighting source 21 with special electrical power cables 36 present inside the compartment 5, and connected, for example, to the electrical system of the building in which the lighting device 1 is to be installed, possibly with the interposition of an electrical or electronic device for transforming the energy (for example a transformer, possibly of the electronic type) and/or for controlling the power source, not illustrated.

The method according to the invention then provides for the phases of inserting the box-shaped body 18 into the hole 2, so as to position it, at least partially, between the arms 13a, 13b of the support bridge 11, and of fixing (figure 13) the first fixing means 23 of the box-shaped body 18 to the second fixing means 24 present in the base 12 of the support bridge 11, so as to removably fix the box-shaped body 18 to the base 12.

Preferably, the first fastening means 23 and the second fastening means 24 are configured in such a way as to automatically fasten to each other when they are below a predetermined mutual distance (and, preferably, to separate when they are brought above such predetermined mutual distance); in this preferred embodiment, the fastening of the first fastening means 23 to the second fastening means 24 can advantageously be carried out simply by bringing together the second end 20 of the box-shaped body 18 (with which the first fastening means 23 are associated) and the base 12 of the bridge 11 (with which the second fastening means 24 are associated), until the first fastening means 23 and the second fastening means 24 are brought below the predetermined mutual distance.

In the advantageous embodiment in which the lighting device 1 comprises the means 27 for adjusting the distance between the first end 19 of the box-shaped body 18 and the base 12 of the support bridge 11, the method according to the invention can advantageously comprise, before the step of electrically connecting the lighting source 21 to the appropriate electrical power cables 36 present inside the compartment 5, the further step of acting on the means 27 for adjusting the distance between the first end 19 of the box-shaped body 18 and the base 12 of the support bridge 11, to adjust the distance between the first end 19 and the base 12 when the box-shaped body 18 is fixed to the base 12.

In the advantageous embodiment in which the lighting device 1 comprises the means 27 for adjusting the distance between the first end 19 of the box-shaped body 18 and the base 12 of the support bridge 11, the method according to the invention can advantageously comprise, after the step of fixing the first fixing means 23 to the second fixing means 24, so as to removably fix the box-shaped body 18 to the base 12, the further steps of:

- separate the first fastening means 23 of the box-shaped body 18 from the second fastening means 24 present in the base 12 of the support bridge 11, so as to separate the box-shaped body 18 from the base 12 of the support bridge 11;

- extract the box body 18 from the hole 2; - act on the adjustment means 27 to adjust the distance between the first end 19 and the base 12 when the box body 18 is fixed to the base 12;

- reinsert the box body 18 into hole 2, so as to position it, at least partially, between the arms 13a, 13b of the support bridge 11;

- re-fix the first fastening means 23 of the box body 18 to the second fastening means 24 present in the base 12 of the support bridge 11, so as to removably fix the box body 18 to the base 12 of the support bridge 11.

In an advantageous embodiment, after having extracted the box-shaped body 18 from the hole 2 and before acting on the adjustment means 27 to adjust the distance between the first end 19 and the base 12 when the box-shaped body 18 is fixed to the base 12, it is advantageously possible to electrically disconnect the light source 21 from the electrical power cables 36 present inside the compartment 5, and then reconnect such light sources 21 to the electrical power cables 36 before reinserting the box-shaped body 18 into the hole 2.

Advantageously, when the box-shaped body 18 is fixed to the base 12 of the support bridge 11, the lighting device 1 does not protrude from the hole 2 on the opposite side to the compartment 5; in other words, in this condition the lighting device 1 is flush with the panel 3.

It has thus been observed that the invention solves the task and aims stated above, since, thanks to its particular structure, the lighting device according to the invention can be installed (or "recessed?") in a covering panel of a ceiling or a wall easily and quickly.

Furthermore, in order to be installed in a panel, the lighting device according to the invention does not require any other holes to be made in the panel other than the one in which the lighting device itself is positioned.

Furthermore, the lighting device according to the invention can be installed and removed easily and quickly, and without necessarily having to repaint the panel, as there is no need to cover additional holes for the screws fixing the lighting device to the wall, as instead happens in the known art cited above.

It is clear, finally, that the lighting device according to the invention, and the method of installing the same, described here, are susceptible to numerous modifications or variations, all of which fall within the scope of the invention; furthermore, all the details can be replaced by technically equivalent elements without departing from the scope of the attached claims.

Claims (10)

1) Lighting device (1) characterised by the fact that it comprises: - a support plate (6), shaped in plan like an open ring, so that it can be inserted, starting from one of its free ends (7a, 7b), into a hole (2) made in a panel (3) fixed at a predetermined distance from a ceiling or wall (4), so as to define a space (5) between said panel (3) and said ceiling or wall (4), said support plate (6) comprising a first face (8) which can be fixed, concentrically to said hole (2), to an internal surface (9) of said panel (3) facing towards the inside of said space (5); - a support bridge (11) which has a base (12) from which two or more arms (13a, 13b) protrude which are fixed or fixable, with their distal ends (14a, 14b), to a second face (10) of said support plate (6), facing the opposite side to said first face (8); - a box-shaped body (18), shaped in such a way that it can be positioned, at least partially, between said arms (13a, 13b) of said support bridge (11), which has a first end (19), open, and comprises, at a second end (20), facing said first end (19), a light source (21) arranged in such a way as to be able to emit light outside said box-shaped body (18) through said first end (19), said box-shaped body (18) comprising first fixing means (23) suitable for removably fixing to corresponding second fixing means (24) associated with said base (12) of said support bridge (11), thus removably fixing said box-shaped body (18) to said base (12) of said support bridge (11). 2) Lighting device (1), as in claim 1, wherein said first fixing means (23) and said second fixing means (24) are of the magnetic and/or snap-fit and/or snap-on type. 3) Lighting device (1), as in claim 1 or 2, wherein said distal ends (14a, 14b) of said arms (13a, 13b) are fixable to said second face (10) of said support plate (6) by means of hooking and centering means (16a, 16b). 4) Lighting device (1), as in one or more of the preceding claims, which comprises means for adjusting (27) the distance between said first end (19) of said box-shaped body (18) and said base (12) of said support bridge (11) when said box-shaped body (18) is fixed to said base (12). 5) Lighting device (1), as in one or more of the preceding claims, wherein said box-shaped body (18) comprises, on one of its external lateral surfaces (31), a gasket (32) suitable for engaging with the internal edge (33) of a hole (2) obtained in a panel (3) in which said lighting device (1) is installed, so as to compensate for any play between said external lateral surface (31) and said internal edge (33). 6) Lighting device (1), as claimed in one or more of the preceding claims, comprising a heat sink (34) fixed to said box-shaped body (18) to dissipate the heat produced by said lighting source (21) and shaped in such a way that it can be arranged, at least partially, between said arms (13a, 13b) of said support bridge (11) when said box-shaped body (18) is positioned between them. 7) Method of installing a lighting device (1) according to one or more of the preceding claims, which is characterised in that it comprises the following phases: (a) making a hole (2) in a panel (3) fixed at a predetermined distance from a ceiling or wall (4), so as to define a space (5) between said panel (3) and said ceiling or wall (4); (b) insert said support plate (6) of said lighting device (1) into said hole (2), starting from a free end (7a, 7b) of said support plate (6); (c) fixing, by gluing, said first face (8) of said support plate (6), concentrically to said hole (2), to an internal surface (9) of said panel (3) facing towards the inside of said compartment (5); (d) insert said support bridge (11) into said hole (2) and fix said distal ends (14a, 14b) of said arms (13a, 13b) to said second face (10) of said support plate (6); (e) electrically connect said light source (21) to specific electrical power cables (36) present inside said compartment (5); (f) insert said box-shaped body (18) into said hole (2), so as to position it, at least partially, between said arms (13a, 13b) of said support bridge (11); (g) fixing said first fixing means (23) of said box-shaped body (18) to said second fixing means (24) present in said base (12) of said support bridge (11), so as to removably fix said box-shaped body (18) to said base (12) of said support bridge (11). 8) Method, as in claim 7, wherein said lighting device (1) comprises means for adjusting (27) the distance between said first end (19) of said box-like body (18) and said base (12) of said support bridge (11), wherein said method comprises, before said step (e), the following step: (f0) act on said adjustment means (27) of the distance between said first end (19) of said box-shaped body (18) and said base (12) of said support bridge (11), to adjust the distance between said first end (19) and said base (12) when said box-shaped body (18) is fixed to said base (12). 9) Method as in claim 7 or 8, wherein said lighting device (1) comprises means for adjusting (27) the distance between said first end (19) of said box-like body (18) and said base (12) of said support bridge (11), wherein said method comprises, after said step (g), the following steps: (h) separating said first fixing means (23) of said box-shaped body (18) from said second fixing means (24) present in said base (12) of said support bridge (11), so as to separate said box-shaped body (18) from said base (12) of said support bridge (11); (i) extract said box-shaped body (18) from said hole (2); (l) act on said adjustment means (27) of the distance between said first end (19) of said box-shaped body (18) and said base (12) of said support bridge (11), to adjust the distance between said first end (19) and said base (12) when said box-shaped body (18) is fixed to said base (12); (m) reinsert said box-shaped body (18) into said hole (2), so as to position it, at least partially, between said arms (13a, 13b) of said support bridge (11); (n) re-fix said first fixing means (23) of said box-shaped body (18) to said second fixing means (24) present in said base (12) of said support bridge (11), so as to removably fix said box-shaped body (18) to said base (12) of said support bridge (11). 10) Method, as in claims 7 or 8 or 9, wherein, when said box-like body (18) is fixed to said base (12) of said support bridge (11), said lighting device (1) does not protrude from said hole (2) on the side opposite to said compartment (5).