FIELD OF INVENTION

The present invention relates to improved luminaire heads for mounting on a pole, in particular to improved outdoor luminaires heads with a plastic housing for mounting on a pole.

BACKGROUND

In the commonly used outdoor luminaires, the luminaire head angle, defined as the angle between the luminaire head and the end of a pole connecting said luminaire head, is fixed, or is inconvenient to adjust. Therefore, the light distribution of the outdoor luminaire is not adequately adjustable according to the characteristics of the environment to be lighted, such as the width of a road. Hence, it is necessary to manufacture outdoor luminaires of different inclinations corresponding to different luminaire head angles, according e.g. to the width of different road surfaces, thereby increasing the manufacturing costs.

Generally, a luminaire head can be fixed to a pole end following two main configurations. The first configuration corresponds to a pole end oriented in a substantially horizontal direction, referred to as side-entry configuration in the following. The second configuration corresponds to a pole end oriented in a substantially vertical direction, referred to as post-top configuration in the following.

Further, when mounting a luminaire head on a pole, the luminaire housing of the luminaire head must be clamped to the pole. The fixation system used in the luminaire head must thus be strong enough to hold the luminaire and tolerate the tightening torque when clamping or the abrasions due to vibrations. A known solution to this problem is to use metallic fixation systems. These metallic fixation systems may be integral with the housing or separate elements added in the housing. These metallic fixation systems are often die cast. A metallic fixation system for adjusting a luminaire head angle is for example known from NL Bl 2021906 of the same applicant. Die cast metal parts yet increase the production costs.

There is therefore the need for improved luminaire heads for mounting on a pole.

SUMMARY

The object of the invention is to provide a cheap and robust luminaire head for mounting on a pole.

According to an aspect of the invention, there is provided a luminaire head comprising a luminaire housing and a clamping mechanism for clamping the luminaire housing onto a pole. The clamping mechanism comprises two sheet metal parts configured to enter in mechanical contact with the pole. The luminaire housing is configured to receive the two sheet metal parts.

In this way, two sheet metal parts are provided to robustly clamp the luminaire housing onto the pole for a reduced cost. No costly die cast metal parts are necessary such that the production costs may be lowered without impacting the robustness. In other words, the luminaire housing is configured to engage with the two sheet metal parts. Receiving may also be understood as holding in the sense of providing mechanical support.

Preferred embodiments relate to luminaire heads for outdoor luminaires. By outdoor luminaires, it is meant luminaires which are installed on roads, tunnels, industrial plants, stadiums, airports, harbours, rail stations, campuses, parks, cycle paths, pedestrian paths or in pedestrian zones, for example, and which can be used notably for the lighting of an outdoor area, such as roads and residential areas in the public domain, private parking areas, access roads to private building infrastructures, warehouses, industry halls, etc.

According to a preferred embodiment, the luminaire housing is made of a plastic material. By plastic material is meant a synthetic material made from a wide range of polymers. In this way, the costs of production may be kept low. Alternatively, a composite comprising some plastic material or any cheap moldable material may be used. Alternatively, the luminaire housing may be made of metal, and for example may be obtained from thin sheet metal or by a die casting process.

According to a preferred embodiment, the luminaire housing comprises a support wall, and the luminaire housing is configured to receive the two sheet metal parts perpendicular to the support wall. In this way, the two sheet metal parts may reinforce the housing to tolerate the tightening torque when fixing the head onto the pole as well as abrasions due to vibrations. In other words, the luminaire housing is configured to engage with the two sheet metal parts to hold them perpendicular to the support wall.

According to a preferred embodiment, the sheet metal parts when fitted in the luminaire housing extend parallel to each other. In this way, the pole may be fitted in between the two sheet metal parts. The distance between the sheet metal parts may be related to the diameter of the pole.

According to a preferred embodiment, the luminaire housing further comprises a fixing mechanism for fixing the two sheet metal parts to the luminaire housing. In this way, the sheet metal parts, and the luminaire housing may be combined to increase the rigidity of the luminaire head. More in particular, the fixing mechanism may be arranged to fix the two sheet metal parts perpendicular to the support wall of the luminaire housing.

According to a preferred embodiment, the fixing mechanism is integral with the luminaire housing. In other words, the luminaire housing may be arranged to engage fixedly with the two sheet metal parts, i.e. to hold them in place. This means each sheet metal part may be directly fixed to the luminaire housing. Preferably the fixing mechanism is made of plastic. In this way, a simple system with few parts may be realized. In other embodiments, the fixing mechanism may be made in metal or in composite material. Alternatively the fixing mechanism may be a separate mechanism added to the luminaire housing.

According to a preferred embodiment, the fixing mechanism comprises one or more longitudinal rib portions preferably integral with the luminaire housing, wherein the one or more longitudinal rib portions are configured to extend perpendicular from the support wall of the luminaire housing towards the inside of the luminaire housing and parallel to a longitudinal direction of the luminaire housing. In this way, the rigidity against deformation around an axis along the lateral direction may be increased. Preferably the one or more longitudinal rib portions are made of plastic. Alternatively, the one or more longitudinal rib portions may be made in metal or in composite material. If the longitudinal rib portions are alternatively not integral with the luminaire housing, a separate flat element comprising said rib portions could be present on the internal face of the support wall.

According to a preferred embodiment, at least two longitudinal rib portions are spaced to receive in between them a sheet metal part such that each respective side surface of a sheet metal part is in mechanical contact with a surface of a respective longitudinal rib portion of the at least two longitudinal rib portions. In this way, the sheet metal part may be maintained in place to avoid movements along the lateral direction. Alternatively at least one longitudinal rib portion may be provided such that at least one side surface of a sheet metal part is in mechanical contact with a surface of the at least one longitudinal rib portion.

According to a preferred embodiment, the fixing mechanism comprises one or more lateral rib portions, preferably integral with the luminaire housing, wherein the one or more lateral rib portions are configured to extend perpendicular from the support wall of the luminaire housing towards the inside of the luminaire housing and parallel to a lateral direction of the luminaire housing. In this way, the rigidity against deformation around an axis along the longitudinal direction may be increased. Preferably the one or more lateral rib portions are made of plastic. Alternatively, the one or more lateral rib portions may be made in metal or in composite material. If the lateral rib portions are alternatively not integral with the luminaire housing, a separate flat element comprising said rib portions could be present on the internal face of the support wall.

According to a preferred embodiment, at least one or more longitudinal rib portions intersect with at least one or more lateral rib portions. In this way a honeycomb structure may be formed to even further increase the rigidity of the luminaire housing and thus the robustness of the clamping mechanism.

According to a preferred embodiment, the fixing mechanism comprises one or more snap-fit elements with the housing. In this way, an easy fixation may be realized. An operator may insert and fix the sheet metal parts in a toolless manner into the housing. Alternatively, the luminaire housing may comprise two longitudinal openings, preferably shaped as slits, for receiving the two metal sheets when inserted from the outside of the luminaire housing. The two metal sheets may in that case be folded at one extremity, such that the folded extremities may respectively abut onto the outside of the luminaire housing for further fixation, using for example known fixing means like screws. Preferably, the two metal sheets, when inserted from the outside of the luminaire housing, may be inserted from an upper side of the luminaire housing.

According to an exemplary embodiment, the two metal sheets can be inserted from a lower side of the luminaire head. According to another exemplary embodiment, the two metal sheets can be inserted from an upper side of the luminaire head.

According to a preferred embodiment, the one or more one snap-fit elements are arranged on a longitudinal rib portion. In this way, efficient use is made of the ribs, a movement in a direction away from the support wall may be avoided. The sheet metal parts may be maintained in contact with the support wall.

According to a preferred embodiment, the fixing mechanism comprises any one or more than the following elements: rivets, bolts, nuts, bolts or a combination thereof. Such fixing means may improve the robustness of the fixing mechanism.

According to a preferred embodiment, the sheet metal parts have a housing-side profile for coupling with the luminaire housing, wherein the housing-side profile comprises one or more notches to engage with the one or more lateral rib portions. In this way, the sheet metal parts are maintained in place in grip-notch manner, and movements along the lateral direction are restricted upon insertion of the metal sheet parts in the housing by engaging the notches.

According to a preferred embodiment, the sheet metal parts are cut metal parts, preferably cut from a sheet with a thickness in the range of 1mm to 5mm, more preferably cut from a sheet with a thickness in the range of 1mm to 3mm. In this way, the sheet metal parts may be easily obtained at low production costs, especially compared to die casting production.

According to a preferred embodiment, the clamping mechanism is configured for side entry and post-top entry. In this way, the luminaire head may be used in different lighting applications and locations.

According to a preferred embodiment, the sheet metal parts have a pole-side profile, for entering in contact with the pole, comprising a stepped profile part for mounting the luminaire head according to a plurality of mounting positions. In this way, the luminaire head may be used in a wide range of applications requiring a plurality of mounting positions. In particular, the stepped pole profile part is configured for accommodating at least two, preferably at least three, more preferably at least four, even preferably at least five mounting positions in the range of -5 degrees to +15 degrees. More in particular, the edges of the stepped pole profile part comprise any one or more than the following: a flat edge, a curved edge, or a combination thereof.

According to a preferred embodiment, the pole-side profile comprises a flat middle portion for entering in contact with the one or more snap-fit elements. In this way, the sheet metal parts may be securely fixed.

According to a preferred embodiment, the pole profile further comprises a facet profile part comprising facets corresponding with the respective steps of the stepped profile part for each mounting position. In this way, two contact points with the pole for each mounting position may be provided.

According to a preferred embodiment, the clamping mechanism further comprises a fastening part configured to secure the pole against the two sheet metal parts. In particular, the fastening part comprises a U-shaped element configured for extending around the end of the pole, and for being fixed to the luminaire housing. According to a preferred embodiment, the luminaire housing comprises at least two holes for inserting the fastening part into the luminaire housing.

According to a preferred embodiment, the luminaire housing comprises a mounting portion and an electrical compartment for housing at least one electrical component. Preferably the housing further comprises a compartment wall separating the mounting portion and the electrical compartment, wherein a cable gland is preferably provided in the compartment wall.

BRIEF DESCRIPTION OF THE FIGURES

This and other aspects of the present invention will now be described in more detail, with reference to the appended drawings showing preferred embodiments of the invention. Like numbers refer to like features throughout the drawings

Figure 1 illustrates a perspective view of an exemplary embodiment of a luminaire head.

Figure 2 illustrates an exploded perspective view of the exemplary embodiment of Figure 1.

Figure 3 illustrates a see-through perspective view of the exemplary embodiment of Figure 1.

Figure 4 illustrates an enlarged perspective view of the arrangement of the sheet metal parts in the housing according to an exemplary embodiment.

Figure 5 illustrates a perspective view of a sheet metal part according to an exemplary embodiment.

Figure 6 illustrates an enlarged view from above of the arrangement of the sheet metal parts in the housing shown in Figure 5.

Figure 7 illustrates an enlarged perspective view of the housing shown in Figure 6.

Figure 8 illustrates a section of the exemplary embodiment of Figure 4.

Figures 9 and 10 illustrate a view from the mounting side of an exemplary embodiment of the luminaire head with and without the pole.

Figures Ila- 11c illustrate schematic views of different side entry configurations of the luminaire head onto the pole and Figures 12a, 12b illustrate schematic views of two post-top mounting configurations of the luminaire head onto the pole.

Figure 13 illustrates a section view of an embodiment of the luminaire showing details of the clamping mechanism.

DESCRIPTION OF EMBODIMENTS

Figure 1 illustrates a perspective view of an exemplary embodiment of a luminaire head 1 while Figure 2 illustrates an exploded perspective view of the exemplary embodiment of Figure 1. A luminaire head 1 may have an upper side la, a lower side lb, a fixation side 1c, a head side Id, and two lateral sides le and If. The upper side la and lower side lb may be substantially parallel with each other. The fixation side 1c may be substantially perpendicular to the lower side lb. The luminaire head 1 comprises a luminaire housing 100 and a clamping mechanism 200 for clamping the luminaire housing 100 onto a pole 2. As illustrated in Figure 1, the luminaire head 1 may be mounted in a side entry configuration, meaning that the pole 2 may be oriented in a substantially horizontal direction. The clamping mechanism 200 is configured to clamp the luminaire 100 onto the pole 2 presenting an axis A, such that the luminaire head is hold in place and may not move around the axis A nor along the axis A.

As shown in Figure 2, the clamping mechanism 200 comprises two sheet metal parts 210 configured to enter in mechanical contact with the pole 2. The two sheet metal parts 210 are configured to be received into the luminaire housing 100, while the luminaire housing 100 is configured to receive the two sheet metal parts 210. In other words, the two sheet metal parts 210 and the housing 100 are configured to engage with each other. The two sheet metal parts 210 may for example be non-bended, (in other words substantially flat), sheet metal parts. For example the two sheet metal parts 210 may be cut metal parts, preferably cut from a sheet with a thickness in the range of 1mm to 5mm, more preferably cut from a sheet with a thickness in the range of 1mm to 3mm.

The clamping mechanism 200 may further comprise a fastening part 220 configured to secure the pole 2 against the two sheet metal parts 210. The fastening part 220 may comprise a U-shaped element configured for extending around the end of the pole 2, and for being fixed to the luminaire housing 100. The fastening part 220 may comprise a clamping jaw 240 and two bolts 230 engaging with the clamping jaw 240. The bolts 230 may interact with nuts (not represented) in a known manner to screw the fastening part 220 in place. The clamping jaw 240 may be a bended metal sheet part with two holes 250 in which the two bolts 230 may engage. The clamping jaw 240 may have side profiles matching the shape of the pole 2.

According to an exemplary embodiment, the luminaire housing 100 is made of plastic. For example the luminaire housing 100 may be molded as one piece. Alternatively, the luminaire housing 100 may be made of metal, and for example may be obtained from thin sheet metal or by a die casting process. The luminaire housing 100 may comprise a mounting portion 100a for receiving the clamping mechanism 200. The mounting portion 100a may comprise the fixation side 1c. The luminaire housing 100 may further comprises an electrical compartment 100b for housing electrical components of the luminaire head, for instance the driver D and an optical module 300 comprising optical elements and the lighting elements of the luminaire head. The optical module 300 may be arranged on the lower side lb of the housing 100 to emit light away from the lower side lb. The lower side lb may be regarded as the front side of the head 1 while the upper side la may be regarded as the back side of the luminaire head 1.

Figure 3 illustrates a see-through perspective view of the exemplary embodiment of Figures 1 and 2. The mounting portion 100a of the luminaire housing 100 may comprise a support wall 110. It is noted that in some embodiments a cover may be added on top of the support wall 110. The support wall may for instance be a wall at the back side la of the luminaire housing 100, looking away from the front side lb of the luminaire, the front side lb being defined by the presence of the lighting elements emitting light towards the outside of the luminaire housing 100. The luminaire housing 100 may be configured to receive the two sheet metal parts 210 perpendicular to the support wall 110. The two sheet metal parts 210 may be arranged in parallel from each other. They further may be arranged at a distance from each other related to the diameter of the pole 2. The electrical compartment 100b may be a closed compartment housing electrical components like the driver of the optical module 300 and optionally a controller and/or a sensor device. The electrical compartment 100b may have a front wall 160 on the front side lb, a side wall 170 on the fixation side 1c through which electrical connections towards the driver and the optical module 300 may enter the compartment 100b. A cable gland 180 may be provided on the side wall 170. The cable gland 180 may be located on the side wall 170 such that when the luminaire head 1 is fixed to the pole 2, the pole 2 is arranged in contact with the side wall 170 and the cable gland 180 can be connected to wires inside the pole 2.

Figure 4 illustrates an enlarged perspective view of the arrangement of the sheet metal parts 210 in the housing 100 according to an exemplary embodiment. The luminaire housing 100 may further comprise a fixing mechanism for fixing the two sheet metal parts 210 to the luminaire housing 100. In an example, the fixing mechanism may be integral with the luminaire housing 100. In particular, the fixing mechanism may comprise one or more longitudinal rib portions 120, 121 preferably integral with the luminaire housing 100. The one or more longitudinal rib portions 120, 121 may be configured to extend perpendicular from the support wall 110 of the luminaire housing 100 towards the inside of the luminaire housing 100. The longitudinal rib portions 120, 121 may extend parallel to a longitudinal direction DI of the housing 100. For a side entry configuration, the longitudinal direction DI of the housing 100 may form an angle lower than 45 degrees in a vertical plane with the axis of horizontal pole. Preferably the longitudinal direction DI of the housing 100 may be substantially parallel with the axis of horizontal pole. There may be a set of longitudinal rib portion 120 or 121 for each sheet metal part 210. The longitudinal rib portions 120 and 121 may be arranged to enter in contact with the sheet metal parts 210. The longitudinal rib portions 120 and 212 may be used to guide the sheet metal parts 210 perpendicular to the support wall 110 and to fix the sheet metal parts 210 to block a movement of the sheet metal parts 210 in a lateral direction D2 perpendicular to the surface of the longitudinal rib portions 120, 121. The lateral direction D2 may then be perpendicular the longitudinal direction DI . There may be additional longitudinal rib portions 122 and 123 not entering in contact with the sheet metal parts 210. The additional longitudinal rib portions 122 and 123 may increase the rigidity of the mounting portion 110a of the housing 100.

In an alternative embodiment, the luminaire housing 100 may comprise two longitudinal openings, preferably shaped as slits, for receiving the two sheet metal parts 210 when inserted from the outside of the luminaire housing 100. The sheet metal parts 210 may in that case be folded at one extremity, such that the folded extremities may respectively abut onto the outside of the luminaire housing 100 for further fixation, using for example known fixing means like screws. Preferably, the two sheet metal parts 210, when inserted from the outside of the luminaire housing, may be inserted from a top side of the luminaire housing 100. More generally, the two metal sheets can be inserted either from a lower side or from an upper side of the luminaire head.

As shown further in Figure 4, the fixing mechanism may further comprise one or more lateral rib portions 130, 131, 132, 133, 134 preferably integral with the luminaire housing 100, wherein the one or more lateral rib portions 130, 131, 132, 133, 134 are configured to extend perpendicular from the support wall 110 of the luminaire housing 100 towards the inside of the luminaire housing (100). The lateral rib portions 130, 131, 132, 133, 134 may extend parallel to the lateral direction D2 of the housing 100. In an embodiment, at least one or more longitudinal rib portions 120 may intersect with at least one or more lateral rib portions 130 to form a honeycomb structure. The lateral and/or longitudinal ribs portions may increase the rigidity of the mounting portion 100a.

The mounting portion 100a may further comprise holes 150 for inserting the fastening part 220 through the luminaire housing 100. The sheet metal parts 210 may be received in the luminaire housing 100 in between the holes 150. One or more longitudinal and lateral rib portions 120, 121 132 may be provided in between the holes 150 to increase the rigidity of the part in between said holes 150 in which the sheet metal parts 210 are received.

In an embodiment, the fixing mechanism may further comprise one snap-fit element 140, 141 for each sheet metal part 210. In particular, the snap-fit elements 140, 141 may be arranged on a longitudinal rib portion 120, 121. The snap-fit elements 140, 141 may for instance be clips engaging with the sheet metal parts 210. A snap-fit element 140, 141 may maintain the connection between the support wall 110 and the sheet metal part 210, once a sheet metal part 210 has been inserted into place into the luminaire housing 100 to come in contact with the support wall 110. It is noted that the fixing mechanism may additionally or alternatively comprise any one or more than the following elements: rivets, bolts, nuts or a combination thereof. When using such alternative fixing mechanisms, the fixing elements could be arranged in at least two or more places of a sheet metal part 210 to fix the sheet metal part 210 to e.g. one or more longitudinal rib portions 120, 121.

Figure 5 illustrates a perspective view of a sheet metal part 210 according to an exemplary embodiment. The sheet metal parts 210 may have a housing-side profile 210a for coupling with the luminaire housing 100. The housing-side profile 210a may be defined as a side profile of the metal sheet 210 that is meant to engage with the luminaire housing 100. The housing-side profile 210a may be substantially straight to engage with the support wall 110. Alternatively the housing-side profile 210a may have a shape corresponding substantially to the shape of the support wall to engage with the support wall 110. The housing-side profile 210a may comprise one or more notches 40 to engage with the one or more lateral rib portions 130 to form a grip notch system. Additionally the notches 40 may have different shapes, and/or position to avoid misplacement of the sheet metal part 210. The height of the notches 40 may be arranged to match the height of the lateral rib portions 130 at the place where the sheet metal part 210 is to be inserted into the luminaire housing 100. The sheet metal parts 210 may be cut metal parts, preferably cut from a sheet with a thickness in the range of 1mm to 5mm, more preferably cut from a sheet with a thickness in the range of 1mm to 3mm. The sheet metal parts 210 may thus be substantially flat. In other words, a sheet metal parts 210 may be formed as a straight sheet of metal.

In an alternative embodiment, the sheet metal parts 210 may be folded at one extremity, such that the folded extremities may respectively abut onto the outside of the luminaire housing 100 for further fixation, using for example known fixing means like screws.

The sheet metal parts 210 may have a pole-side profile 210b for entering in contact with the pole 2. The pole-side profile 210b may be defined as a side profile of the metal sheet 210 that is meant to engage with the pole 2. The pole-side profile 210b may comprise a stepped profile part 10 and a facet profile part 30 for mounting the luminaire head according to a plurality of mounting positions. The stepped pole profile part 10 and the facet profile part 30 may be configured for accommodating at least two, preferably at least three, more preferably at least four, even preferably at least five mounting positions in the range of -5 degrees to +15 degrees. The stepped pole profile part 10 may comprise a plurality of stepped edges with a plurality of shapes and opening angles. The edges of the stepped pole profile part 10 may be flat, curved or a combination thereof. The facet profile part 30 may comprise facets corresponding with the respective steps of the stepped profile part 10 for each mounting position. For example the angle of a facet 31 of the facet profile part 30 may correlate with the orientation and opening of a corresponding edge 11 of the stepped profile part 10 as will be further illustrated in Figures 10a- lOe. Inbetween the stepped pole profile part 10 and the facet profile part 30, the pole-side profile 210b may further comprise a flat portion 20 for entering in contact with a snap-fit element 140 of Figure 4. The sheet metal 210 may further have two parallel straight side portions 50, representing lateral sides substantially perpendicular to the housing side profile 210. A portion 60 in between the flat portion 20 and the facet portion 30 may further be substantially straight and substantially parallel with the side portions 50.

Figures 6 and 7 illustrate enlarged view from above and in perspective of the arrangement of the sheet metal parts in the housing shown in Figure 4. As previously presented, the two sheet metal parts 210 may be inserted into the luminaire housing 100 comprising the rib portions 120 and 130. In particular the sheet metal parts 210 may be slit in between parallel rib portions 120a-120e while aligning the notches 40 with the lateral rib portions 130 until the sheet metal parts engage with the support wall and the snap fit elements 140. Then the sheet metal parts 210 may no longer move and the luminaire head 1 may be ready for clamping with the pole 2.

Each set of longitudinal rib portions, 120, respectively 121, may be associated with one sheet metal part 210. Each set of longitudinal rib portions, 120, respectively 121, may comprise longitudinal support rib portions 120a-120e, respectively 121a-121e, which are arranged to receive in between them their respective sheet metal part 210 such that each respective side surface of a sheet metal part 210 is in mechanical contact with a surface of a respective longitudinal support rib portion, 120a-120e, 121a-121e. In an example, the longitudinal support rib portions 120a, 120c and 120e may arranged to be coplanar with each other and in contact with one side surface of a sheet metal part 210, while the longitudinal support rib portions 120b and 120d are arranged to be coplanar with each other and in contact with the opposite side surface of the same sheet metal part 210. The sheet metal part 210 is in other words taken in sandwich between longitudinal support rib portions. Alternatively at least one longitudinal rib portion may be provided such that at least one side surface of a sheet metal part is in mechanical contact with a surface of the at least one longitudinal rib portion.

Figure 8 illustrates a section of the arrangement of the sheet metal parts in the housing shown in Figure 4 along a plane perpendicular to the support wall 110 and parallel to the compartment 170 housing the cable gland 180. This figure shows how the snap fit elements 140, 141 may be located on the longitudinal rib portions 120b and 121b to engage with the flat portion 20 of the sheet metal parts 210. Alternatively snap fit elements may be located on the longitudinal rib portions 120a, 121a to engage with the portions 60 of the sheet metal parts 210 or to engage with the side portions 50 of the sheet metal parts 210. The support 110 may be provided with slits 111 adjacent to the longitudinal rib portions 120b, 121b to allow the plastic deformation of the longitudinal rib portions 120b, 121b necessary for the snap-fit elements 140, 141. The support wall 110 may further be connected to projecting cone walls 155 terminated with the holes 150 for inserting the fastening part 220 through the luminaire housing 100.

Figures 9 and 10 illustrate a view from the mounting side 1c of an exemplary embodiment of the luminaire head 1 with and without the pole 2. Figure 9 shows the fixation side 1c of the luminaire head 1 in which the sheet metal parts 210, the side wall 170 and the cable gland 180 may be seen. The sheet metal parts 210 may extend parallel to each other and parallel to a direction D3. The direction D3 may be perpendicular with the support wall 110 and parallel with the lateral surfaces 190 and 191 of the lateral sides le and If. The sheet metal parts 210 and the cable gland 180 may be centered on the side wall 170 with respect to the lateral sides le and If. The cable gland 180 may be arranged on the side wall 170 in between the sheet metal parts 210. In other words the sheet metal parts 210 may be spaced apart to accommodate the cable gland 180 in-between them. The cable gland 180 may be arranged on the side wall 170 in close proximity with the sheet metal parts 210, more in particular in-between the metal sheet parts 210 and an edge between the side wall 170 and the front wall 160 of Figure 3. Figure 10 shows a view similar to the view of Figure 9 in which the pole 2 and the fastening part 220 comprising the clamping jaw 240 and the bolts 230 have been further illustrated. In particular Figure 10 shows how the cable gland 180 may be located on the side wall 170 such that the cable gland 180 may fit inside the hollow pole 2. The clamping jaw 240 may be bended metal sheet part with side profiles having a shape substantially matching the shape of the pole 2. The bolts 230 may extend substantially parallel with the sheet metal parts 210, and substantially perpendicular to the support wall 110 at the back side of the luminaire housing 100. The bolts 230 may thus extend parallel with the direction D3, defined with respect to the support wall 110. The directions DI, D2 and D3 may form a 3D coordinated axis system, where DI would define the longitudinal axis, D2 the lateral axis and D3 the vertical axis. Depending on the mounting position selected by an operator, there may be a different angle between the axis A of the pole 2 and a plane defined by the directions DI and D2..

Figures Ila- 11c illustrate schematics views of different side entry mounting configurations of the luminaire head onto the pole, wherein the head 1 and the sheet metal parts 210 comprised therein are fixed on a horizontal pole 2, while Figures 12a- 12b show two different post-top mounting configurations on a vertical pole 2. The sheet metal parts 210 allow for multiple mounting orientations of the head 1 with respect the pole 2 using the pole-side profile 210b with multiple edges. In a side entry configuration, the longitudinal direction of the housing 100 may be substantially parallel with the axis of the pole, and in a post-top entry configuration the longitudinal direction of the electrical compartment 100b may be substantially perpendicular to the axis of the pole 2, in other words in both cases substantially horizontal. The housing-side profile (not represented) of the sheet metal parts 210 for a post-top mounting configuration may be configured to be fixed in a suitable manner to a luminaire housing 100 while keeping the same principle as the embodiments for side-entry configuration. The mounting portion 100a may in such cases be arranged at angle with the electrical compartment 100b. The luminaire housing 100 may have for instance a substantially L-shape.

According to another embodiment (not illustrated), the two sheet metal parts 210 may be part of a U-shaped element, where the parallel branches of the U element would be formed by the two sheet metal parts 210. In such an embodiment, the one or more longitudinal rib portions 120 and 121 may be dispensed with and the clips 140 and 141 may be provided rather on lateral rib portions. Additional fixing elements may further be provided to fix the U-shaped element to the support wall 110. The U-shaped element may be formed from a sheet metal part bend in a U form, such that the benefit in terms of costs of manufacturing would still be achieved.

It is further noted that the fixing elements mentioned in the present application may be releasable fixing elements suitable for maintenance or replacement of the luminaire head.

Figure 13 illustrates a section view showing in particulier how the bolts 230, the clamping jaw 240, the metal sheets 210 and the support wall 110 interact to clamp the luminaire housing 100 to the pole 2. As explained previously, the support wall 110 may further be connected to projecting cone walls 155 terminated with the holes 150 for inserting the fastening part 220 through the luminaire housing 100, and more in particular the bolts 230. The bolts 230 may comprise a head 231 engaging with a flange 261. The flange 261 may further be arranged in between the head 231 and a bushing 262 having a flange portion abutting on the flange 261 and a rim projecting into the hole 150 around the bolt 230. The bushing 262 may extend till the interior of the housing 100 over at least the hole depth of the hole 150, such that the bolt 230 may not touch directly the sides of the hole 150. The hole 150 may have a conical shape being wider towards the inside of the luminaire housing 100. In this way the bolt 230 may be tilted inside the hole 150 with respect to the wall 110 to adapt to different mounting configurations. The cone wall 155 may end with an end portion in which the hole 150 is located. That end portion may have a substantially flat internal (with respect to the housing) surface and an external surface (with respect to the housing) with a given curvature (represented by dotted lines) to allow the head 231 of the bolt 230 to tilt easily inside the conical hole 150.

Whilst the principles of the invention have been set out above in connection with specific embodiments, it is understood that this description is merely made by way of example and not as a limitation of the scope of protection which is determined by the appended claims.