FIELD OF INVENTION

The present invention relates to luminaire systems and methods. Particular embodiments relate to an angle adjustment and rotation system and method for adjusting the orientation of a luminaire. Other particular embodiments relate to a luminaire comprising a luminaire head and a fixation system, and to a method for attaching a luminaire head of a luminaire to a luminaire 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.

In addition, commonly used outdoor luminaires enable the connection of a pole having fixed dimensions to the luminaire head, or the connection between the luminaire head and the pole is inconvenient to adjust. Therefore, the installation of the luminaire head is not adequately adjustable according to the characteristics of the pole to be connected, such as the diameter of the pole. Hence, it is necessary to manufacture outdoor luminaires of different configurations corresponding to different pole characteristics, according e.g. to the diameter of different poles, thereby also 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 vertical direction, referred to as “post-top” configuration in the following. The second configuration corresponds to a pole end oriented in a substantially horizontal direction, referred to as “side-entry” configuration in the following. The current problem occurring in the industry of outdoor luminaires is that luminaire heads are designed either to be fixed according to the post-top configuration, or according to the side-entry configuration, thereby also increasing the manufacturing costs. WO2019229045A1 in the name of the applicant discloses an angle adjustment and rotation system which allows for a luminaire head to be adjusted with ease to a variety of different orientations while still allowing for a high degree of precision, and which is not unnecessarily complex. The angle adjustment and rotation system comprises a first element, a second element, and an attaching element. The attaching element, which attaches the first element to the second element, is configured to have at least a first state in which it tightly attaches the first element to the second element and a second state in which it movably attaches the first element to the second element.

Another existing system for tilting a luminaire head is described in international patent application W02020144191 in the name of the Applicant.

Although both systems provide a good and robust solution for adjustably attaching a luminaire head to a support such as a pole, for some applications it is advantageous to look for alternative systems, and in particular systems that can be easily built with standard components.

SUMMARY

An object of embodiments of the invention is to provide an angle adjustment and rotation system for a luminaire. More in particular, embodiments of the invention aim to provide a luminaire for which the rotation angle of a luminaire head thereof can be adjusted on site, depending on the site to be illuminated and/or the specific application.

Embodiments of the invention also provide a method for controlling an orientation of a luminaire head connected to a luminaire pole with such an angle adjustment and rotation system.

According to a first aspect of the invention, there is provided an angle adjustment and rotation system for a luminaire. The angle adjustment and rotation system comprises a first element, a second element, a pivot element, and a locking element. The first element is configured to be attachable to a luminaire pole, and comprises a tubular portion extending along a first axis. The second element is configured to be attachable to a luminaire head, and is coupled to an end of the tubular portion. One of the second element and the first element is provided with an edge portion. The first and second element and the pivot element are configured and arranged to enable a rotation movement of the second element relative to the first element around a pivot axis perpendicular to the first axis. The locking element is configured to be in a first state wherein it enables the rotation movement of the second element, and in a plurality of second states along the edge portion, wherein it blocks said rotation movement. The locking element comprises an engagement portion configured not to be in contact with the edge portion in said first state, and to cooperate with the edge portion in said plurality of second states in order to lock the second element with respect to the first element.

Embodiments of the invention are based inter alia on the insight that the light distribution of common outdoor luminaires is not adequately adjustable according to the characteristics of the environment to be lighted, such as the width of a road.

In the angle adjustment and rotation system of embodiments of the invention, the locking element is configured to be in a first state wherein it enables the rotation movement of the second element, and in a plurality of second states wherein it blocks said rotation movement. Moreover, the engagement portion of the locking element is configured to cooperate with the edge portion in said plurality of second states in order to lock the second element with respect to the first element. Hence, the cooperation of the engagement portion and the edge portion of the angle adjustment and rotation system enables an easy adjustment of the rotation angle of the luminaire head on site, depending on the site to be illuminated and/or the specific application. Also, the control of the orientation of the luminaire head is facilitated with such an angle adjustment and rotation system. Further the pivot element and the locking element can be standard components available on the market, and the first and second element can be easily manufactured based on standard profiles available on the market. In other words, in preferred embodiments, the first and the second element are manufactured without requiring expensive die casting tools. Also, the amount of components of the angle adjustment and rotation system is limited, further reducing the manufacturing costs.

Moreover, exemplary embodiments of the angle adjustment and rotation system according to the invention also present the advantage of facilitating and simplifying the fixation of the luminaire head to the luminaire pole with a reduced amount of components to be manufactured, whilst enabling a robust and adjustable fixation of the luminaire head in a plurality of second states corresponding to different inclination of the luminaire head.

Preferred embodiments relate to an angle adjustment and rotation system for an outdoor luminaire. By outdoor luminaire, it is meant luminaires which are installed on roads, tunnels, industrial plants, stadiums, airports, harbors, 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, a shape of the engagement portion and a shape of the edge portion are complementary in said plurality of second states.

In this way, the complementary shapes of the engagement portion and the edge portion enable an easy fixation of the luminaire head in said plurality of second states.

According to a preferred embodiment, the edge portion comprises a plurality of teeth, and the locking element is configured in its plurality of second states along the edge portion to enable the engagement of the engagement portion with the plurality of teeth, and in its first state to enable the release of the engagement portion such that said rotation movement of the second element is enabled around said pivot axis.

In this way, the cooperation of the plurality of teeth with the engagement portion enables an easy adjustment of the rotation angle of the luminaire head in said first state, and an easy fixation of the luminaire head in said plurality of second states, whilst simplifying and reducing the amount of components. The contact of the engagement portion with different teeth of the plurality of teeth enables a fixation of the luminaire head in different positions corresponding to different inclinations of the luminaire head. It is noted that the plurality of teeth may be implemented as a continuous sequence of teeth provided along the edge portion or as multiple teeth sequences provided at a distance of each other along the edge portion, each teeth sequence having a plurality of teeth. The skilled person will understand that various implementations are possible depending on the desired number of possible locking states.

According to a preferred embodiment, the tubular portion is received in an open side of the second element, wherein the edge portion delimits the open side of the second element, and wherein the locking element passes through the first element. In an alternative embodiment, an end portion of the second element is received in an open side of the first element, wherein the edge portion delimits the open side of the first element, and wherein the locking element passes through the second element.

Preferably, the engagement portion is provided with at least two flat surfaces configured to cooperate with the edge portion.

In this way, the at least two flat surfaces provided to the engagement portion cooperate with the edge portion, in particular with the plurality of teeth, in order to fix the luminaire head. According to a preferred embodiment, the locking element comprises a bolt with a head and an associated nut. The bolt passes through the first element if the edge portion is provided to the second element or through the second element if the edge portion is provided to the first element.

In this way, a simple and easy attachment of the first element to the second element is provided, using standard components such as the above bolt and associated nut.

Preferably, the engagement portion is adjacent to the head.

In this way, a standard component e.g. in the form of a DIN 603 mushroom head square neck bolt may be used for the locking element.

According to a preferred embodiment, the engagement portion has a substantially polygonal shape, preferably a substantially square shape.

Polygonal shapes of the engagement portion offer the advantage to use edges thereof in order to cooperate with the edge portion, in particular with the plurality of teeth, in order to fix the luminaire head more efficiently.

Preferably, the edge portion extends substantially along a circle segment around the pivot axis, preferably a circle segment of at least 90°.

It is noted that in an embodiment with teeth, the teeth may be arranged along the entire circle segment or along multiple portions thereof depending on the desired number of possible locking positions. By using a circle segment of at least 90°, both post -top and side-entry configurations as defined in the background of the invention are possible.

According to a preferred embodiment, the edge portion is provided to the second element, and the first element comprises a hole through which the locking element passes and a shape of the locking element is such that the engagement portion is locked in the hole in said plurality of second states. In an alternative embodiment, the edge portion is provided to the first element, and the second element comprises a hole through which the locking element passes and a shape of the locking element is such that the engagement portion is locked in the hole in said plurality of second states.

According to an exemplary embodiment, said hole has a non-rotational-symmetric shape configured to match a non-rotational-symmetric shape of the engagement portion. In this way, the matching shape of said hole enables the engagement portion to be locked in a fixed position with respect to the first or second element, thereby preventing any potential rotation movement of the locking element with respect to the first or second element when arranged in the hole. Indeed, such a rotation movement could cause the release of the engagement portion with respect to the edge portion, in particular with respect to the plurality of teeth, thereby releasing the fixation of the luminaire head and allowing undesirable rotation movements of the luminaire head.

According to a preferred embodiment, the edge portion comprises a substantially circular section provided with a plurality of protrusions configured to form complementary surfaces for the locking element.

In an embodiment, the plurality of protrusions may correspond to the above-mentioned plurality of teeth. In another embodiment, said plurality of protrusions may have shapes different from those of the above-mentioned plurality of teeth. For example, the plurality of protrusions may have rounded shapes instead of sharp shapes. Also, the substantially circular section of the edge portion enables a rotation movement of the plurality of protrusions with respect to the pivot axis with a constant distance, i.e., a constant radius, between each of the plurality of protrusions and the pivot axis. In this way, the plurality of protrusions may all have the same shape and dimensions.

According to a preferred embodiment, the second element extends along a second axis and the second element and the first element are configured to allow an adjustment of an angle between the first axis and the second axis within a range of at least 90°.

According to a preferred embodiment, the plurality of second states comprises a first locked position wherein the second element is substantially perpendicular to the first element, and a second locked position wherein the second element is substantially parallel to the first element.

In this way, the angle adjustment and rotation system enables an adjustment of the angle of the luminaire head which is compatible with both post-top and side -entry configurations as defined in the background of the invention. Indeed, by definition said post-top and side -entry configurations are separated by an angle of 90°. The above first locked position corresponds to the post-top configuration, and the above second locked position corresponds to the side -entry configuration. Hence, enabling a rotation angle of the second element with respect to the first element within a range of at least 90° corresponds to enabling the use of a single angle adjustment and rotation system for both post-top and side -entry configurations. According to an exemplary embodiment, the locking element and the edge portion are configured to adjust a position of the second element relative to the first element in a plurality of first positions near said first locked position and in a plurality of second positions near said second locked position.

According to an embodiment, the size, shape, and position of the plurality of teeth enable the fixation of the second element to the first element in the plurality of second states of the locking element in a plurality of positions, wherein two adjacent positions are rotated along the pivot axis over an angle of less than 10°, preferably over an angle of between 2° and 6°.

Hence, a refined adjustment of the angle of the luminaire head is enabled for each of said post-top and side -entry configurations.

According to a preferred embodiment, the tubular portion is a hollow tube having a substantially polygonal cross section, preferably a substantially rectangular cross section, preferably a substantially square cross section.

Hence, a simple and robust angle adjustment and rotation system may be manufactured by using simple shapes for the first element, in particular by using said substantially square cross section. For example, the tubular portion may correspond to a common “off the shelf’ tubular portion having e.g. a rectangular or square cross section, thereby reducing the manufacturing costs. Preferably the shape of the tubular portion matches with the shape of the second element, such that a side of the tubular portion contacts a side of the second element.

In other embodiments, the tubular portion may have a cylindrical shape.

According to a preferred embodiment, the first element or the second element comprises a receiving portion with an open top and/or bottom for receiving an insert portion of the second or first element, respectively, said receiving portion having two opposite side walls through which the pivot element passes. When the edge portion is provided to the second element, typically the second element with be provided with the receiving end portion. When the edge portion is provided to the first element, typically the second element with be provided with the receiving end portion In this way, the angle adjustment of the luminaire head is enabled in an easy manner whilst using simple shapes, in particular using said receiving portion comprising said two side walls. The open top and/or bottom will allow the first element to be pivoted relative to the second element.

According to an exemplary embodiment, the edge portion is provided to an edge of one of the two side walls.

According to a preferred embodiment, an outer side of the tubular portion is provided with visual indications of the possible angular orientations of the second element relative to the first element.

According to an exemplary embodiment, the visual indications are configured to cooperate with at least one visual indication provided to an edge of one of the two side walls opposite the edge provided with the edge portion.

In this way, the operator may easily and precisely adjust the inclination of the luminaire head.

According to a preferred embodiment, wherein the pivot element comprises a bolt extending through the first and second element and an associated nut.

In this way, a simple and easy pivoting of the first element relative to the second element is provided, using standard components such as the above bolt and associated nut.

According to a preferred embodiment, an outer side of one of the first element and the second element is provided with visual indications of possible angular orientations of the second element relative to the first element. Preferably, the other one of the first element and the second element is provided with at least one reference indication intended to be aligned with one of the visual indications of the possible angular positions. For example, the at least one reference indication may be provided to an edge of one of the two side walls of the receiving portion opposite the edge provided with the edge portion.

According to a second aspect of the invention, there is provided a luminaire comprising a luminaire head, a luminaire pole, and an angle adjustment and rotation system of any one of the previous embodiments. The luminaire head is attached to the luminaire pole via the angle adjustment and rotation system. According to a preferred embodiment, the luminaire head comprises a light source. Preferably, the light source comprises a support, such as a PCB, on which a plurality of light emitting diodes (LEDs) is mounted. The LEDs may be arranged in an array of multiple columns and rows.

According to a preferred embodiment, the luminaire head is provided with a heat sink including a plurality of cooling fins. A heat sink enables dissipation of heat generated by the light source towards the outside of the luminaire head.

According to a preferred embodiment, one or more optical elements are associated with the light source. The one or more optical elements may comprise a plurality of lens elements associated with the plurality of LEDs, e.g. grouped in a lens plate. However, also other types of optical elements may be additionally or alternatively present, such as reflectors, backlights, prisms, collimators, diffusors, and the like. In the context of the invention, a lens element may include any transmissive optical element that focuses or disperses light by means of refraction. It may also include any one of the following: a reflective portion, a backlight portion, a prismatic portion, a collimator portion, a diffusor portion. For example, a lens element may have a lens portion with a concave or convex surface facing a LED, or more generally a lens portion with a flat or curved surface facing the LED, and optionally a collimator portion integrally formed with said lens portion, said collimator portion being configured for collimating light transmitted through said lens portion. Also, a lens element may be provided with a reflective portion or surface or with a diffusive portion.

According to an exemplary embodiment, the light source may comprise a plurality of first light elements such as LEDs and one or more associated first optical elements configured to output a first light beam having a first color temperature according to a first intensity distribution within a first solid angle, and a plurality of second light elements such as LEDs and one or more associated second optical elements configured to output a second light beam having a second color temperature according to a second intensity distribution within a second solid angle. The second intensity distribution may be different from the first intensity distribution. Also, the second color temperature may be different from the first color temperature. Exemplary embodiments of such light sources are disclosed in Dutch patent application with application number NL2024571 in the name of the applicant which in included herein by reference.

According to an exemplary embodiment, the light source may comprise RGB and/or RGBW and/or RGBA LEDs and associated control circuitry for controlling the color emitted by the light source. According to an exemplary embodiment, the luminaire head further comprises a transparent or translucent portion facing the light source. Optionally, a color filter arranged between the light source and the transparent or translucent portion. For example, the color filter may be a sheet arranged above the transparent or translucent portion. The color filter is configured to absorb a portion of the light emitted by the light source in specific wavelength ranges so as to change the color of the light emitted by the luminaire head. Preferably, the color filter is accessible by opening the luminaire head. In that way, the color filter can be easily changed, e.g. when it is desirable to change the color of the emitted light for a special occasion or festivity.

According to a preferred embodiment, the luminaire head comprises an electronic assembly. Preferably, the electronic assembly comprises any one or more of the following: a light source dimming means, surge protection circuitry, electrostatic discharge (ESD) protection circuitry, connecting means, a fuse, a driving and/or control circuitry for any electrical components of the luminaire head. Surge protection circuitry is provided to absorb energy and protect the driver, typically including a LED driver circuit, and optionally a light source dimming means. The role of an ESD protection circuitry is to reduce the risk of accumulating electrostatic charge to a critical level so as to avoid that ESD happen through an insulation layer and damage semiconductor components such as LEDs. Optionally, a flux exhauster may be arranged at a side of the luminaire head, around the light source. In addition or alternatively, an inner surface of said side may be painted or coated to fulfill the function of flux exhauster itself. A flux exhauster in the context of the present invention is typically plate -like and has a surface with good reflective properties.

According to embodiments of the invention, the luminaire head comprises a housing wherein the light source, the electronic assembly, and optionally the heat sink and the flux exhauster are arranged. The above-mentioned transparent or translucent portion facing the light source may be part of the housing. Also, the housing may comprise an upper cover configured to cover and protect the components of the luminaire head inside the housing. Preferably, the transparent or translucent portion and the upper cover form a sealed housing. In some embodiments, the luminaire head can have an overall round shape, i.e., any one or more of the components of the luminaire head may have a round shape. In other embodiments, the luminaire head may have an overall polygonal shape, such as a square or rectangular shape. Thus, any one or more of the components of the luminaire head may have a polygonal shape. Also mixed shapes are possible.

According to a third aspect of the invention, there is provided a method for controlling an orientation of a luminaire head connected to a luminaire pole with an angle adjustment and rotation system of any one of the previous embodiments, comprising rotating the second element relative to the first element around the pivot axis in order to control the orientation of the luminaire head.

The skilled person will understand that the hereinabove described technical considerations and advantages for the system embodiments also apply to the below described corresponding method embodiments, mutatis mutandis.

According to a preferred embodiment, the method further comprises, before the rotation movement, moving the engagement portion in a direction away from the first or second element such that the rotation movement of the second element relative to the first element is enabled in the first state of the locking element. More in particular, when the locking element is implemented as a nut with a head and an engagement portion next to the head, the engagement portion may be pulled out of a corresponding hole in the first or second element, depending on whether the edge portion is provided to the second or first element, respectively.

According to a preferred embodiment, the method further comprises, after the rotation movement, moving the engagement portion towards the first or second element such that the rotation movement of the second element relative to the first element is blocked in a second state of the plurality of second states of the locking element. More in particular, when the locking element is implemented as a nut with a head and an engagement portion next to the head, the engagement portion may be pushed in a corresponding hole in the first or second element, depending on whether the edge portion is provided to the second or first element, respectively.

According to an embodiment, the second element extends along a second axis, and the method further comprises adjusting an angle between the first axis and the second axis within a range of at least 90°.

According to a preferred embodiment, the method further comprises arranging the second element in a first locked position relative to the first element wherein the second element is substantially perpendicular to the first element, or in a second locked position relative to the first element wherein the second element is substantially parallel to the first element.

According to an exemplary embodiment, the method further comprises adjusting a position of the second element relative to the first element in a first position of the plurality of first positions near said first locked position or in a second position of the plurality of second positions near said second locked position. According to an embodiment, the edge portion is provided with a plurality of teeth, and the engagement portion is provided with at least two flat surfaces, and the method further comprises enabling the engagement of the at least two flat surfaces with two teeth of the plurality of teeth, and enabling the release of said engagement such that said rotation movement of the second element is enabled.

According to an embodiment, the method further comprises placing the engagement portion in contact with a tooth of the plurality of teeth.

According to a preferred embodiment, the method further comprises providing an outer side of the first and/or second element with visual indications of the possible angular orientations of the second element relative to the first element.

According to an embodiment, the method further comprises moving the locking element towards the first or second element such that a hole in the first or second element surrounds at least a part of the engagement portion and locks the engagement portion.

An object of other embodiments of the invention is to provide a luminaire comprising a luminaire head and a fixation system. More in particular, other embodiments of the invention aim to provide a luminaire for which the luminaire head can be attached on site to different types of luminaire poles.

Embodiments of the invention also provide a method for attaching a luminaire head of a luminaire to a luminaire pole with such a fixation system.

According to a fourth aspect of the invention, there is provided a luminaire comprising a luminaire head and a fixation system configured to attach the luminaire head to a luminaire pole. The fixation system comprises a tubular portion configured to receive a pole end of the luminaire pole, two threaded rods extending through the tubular portion, and a support configured to be arranged inside the tubular portion and provided with two threaded bores for receiving the two threaded rods. An inner surface of the tubular portion is configured to contact the pole end in at least two support points located on opposite sides of a plane extending through the two threaded rods. The support and the tubular portion are configured such that the threaded rods can fix a first diameter of the luminaire pole and a second diameter of the luminaire pole different from the first diameter. Embodiments of the invention are based inter alia on the insight that the installation of a common luminaire head is not adequately adjustable according to the characteristics of the pole to be connected, such as the diameter of the pole.

In the luminaire of embodiments of the invention, the support and the tubular portion are configured such that the threaded rods can fix a first diameter of the luminaire pole and a second diameter of the luminaire pole different from the first diameter. Hence, the fixation system of embodiments of the invention enables the connection of a luminaire head to different luminaire poles having different diameters, thereby improving the modularity of the luminaire. Accordingly, the installation of the luminaire head is adequately adjustable according to the diameter of the pole. In order to fix a luminaire pole of the first diameter, the two threaded rods may be moved over a first distance inside the tubular portion. In order to fix a luminaire pole of the second diameter, the two threaded rods may be moved over a second distance inside the tubular portion, said second distance being different from the first distance.

It is noted that the at least two support points located on opposite sides of a plane extending through the two threaded rods will comprise a first support point on a first side of said plane and a second support point on a second opposite side of the plane. Further, it will be understood that the support points may be part of a larger support area, e.g. a support surface or a line.

In addition, the support is configured to be arranged inside the tubular portion and is provided with the two threaded bores for receiving the two threaded rods. Hence, the arrangement of the support inside the tubular portion enables a reduction of the free length of the two threaded rods, thereby reducing a bending of the two threaded rods. Such a bending may cause the fixation system to release the fixation of the luminaire pole, thereby releasing the fixation of the luminaire head from the luminaire pole. By “free length” of the two threaded rods, it is meant a length of the two threaded rods inside the tubular portion, measured from the support to an outer surface of the luminaire pole.

Further, an inner surface of the tubular portion is configured to contact the pole end and to prevent a movement thereof inside the tubular portion. Hence, a simple and secure fixation of the luminaire pole to the tubular portion may be enabled, with reduced risks of instabilities due to movements of the luminaire pole inside the tubular portion.

Moreover, exemplary embodiments of the luminaire according to the invention also present the advantage to manufacture a simple and robust fixation system by using simple shapes for the tubular portion. For example, the tubular portion may correspond to an “off the shelf’ tubular portion having a rectangular or square cross section, thereby reducing the manufacturing costs. In the case such a common tubular portion is used for manufacturing the fixation system, a thickness of the tubular portion may not be sufficient for providing two threaded bores. Therefore, it may be advantageous to provide the support with the two threaded bores for receiving the two threaded rods instead of the tubular portion. In other cases, the tubular portion used for manufacturing the fixation system may have a sufficient thickness for providing two threaded bores.

Preferred embodiments relate to an outdoor luminaire. By outdoor luminaire, it is meant luminaires which are installed on roads, tunnels, industrial plants, campuses, stadiums, airports, harbors, rail stations, 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 an exemplary embodiment, the support and the tubular portion are configured such that the support can be in a first position corresponding to the first diameter of the luminaire pole, and in a second position corresponding to the second diameter of the luminaire pole. The first diameter is larger than the second diameter and the first position is different from the second position.

In this way, the fixation system enables the connection of a luminaire head to different luminaire poles having different diameters, thereby improving the modularity of the luminaire. In order to fix a luminaire pole of the first diameter, the support may be arranged in the first position inside the tubular portion. In order to fix a luminaire pole of the second diameter, the support may be arranged in a second position inside the tubular portion, said second position being different from the first position. Further, as the first diameter is larger than the second diameter, in order to fix a luminaire pole of a diameter between the first and second diameters the support may be moved from the second, lower, position to the first, higher, position, and the two threaded rods may be moved according to a given distance between the above-mentioned first and second distances. By “lower” and “higher” positions, it is meant positions between an inner surface of the tubular portion and an outer surface of the luminaire pole. A lower position may correspond to a position where the support is nearer to an axis of the tubular portion, compared to a higher position where the support is further away from the axis of the tubular portion. According to a preferred embodiment, the support is a separate piece configured to be supported on the inner surface of the tubular portion.

Hence, a simple and robust fixation system can be manufactured by using simple shapes for the tubular portion. For example, the tubular portion may correspond to the above-mentioned off-the- shelf tubular portion, thereby reducing the manufacturing costs.

According to a preferred embodiment, the tubular portion is a hollow tube having a substantially polygonal cross section, preferably a substantially rectangular cross section, more preferably a substantially square cross section.

According to a preferred embodiment, the tubular portion is provided with two holes configured to receive the two threaded rods.

In the case the above-mentioned off-the-self tubular portion is used for manufacturing the fixation system, the two holes provided to the tubular portion may not be threaded bores. In other cases, the tubular portion used for manufacturing the fixation system may have a sufficient thickness for providing two threaded bores configured to receive the two threaded rods.

According to an exemplary embodiment, at least two adjacent faces of the inner surface of the tubular portion are configured to contact the pole end.

According to an embodiment, the at least two adjacent faces of the inner surface of the tubular portion are oriented at an angle between 60° and 120° with respect to each other, preferably at an angle of substantially 90° with respect to each other.

In this way, the pole end may be contacted by the two adjacent faces, and a movement of the luminaire pole may be prevented thanks to the edge between the two adjacent faces.

According to an embodiment, said two holes are provided at an edge of the tubular portion facing said at least two adjacent faces.

According to another exemplary embodiment, at least one face of the inner surface of the tubular portion comprises a blocking means configured to support the pole end (E) in at least the two support points located on opposite sides of a plane extending through the two threaded rods. In this alternative embodiment, the blocking means may be provided to only one face of the inner surface of the tubular portion, in comparison with the embodiment wherein at least two adjacent faces of the inner surface of the tubular portion are used for blocking said rotation movement.

According to an embodiment, the blocking means comprises two blocking elements configured to be arranged at either side of the pole end, i.e. on either side of the plane extending through the two threaded rods. Typically each blocking element will support the pole end in more than a single point, and will form a support surface.

According to an embodiment, said two holes are provided at a face of the tubular portion opposite said at least one face.

According to a preferred embodiment, the two threaded rods are received in the corresponding two threaded bores at a distance from each other and extend substantially parallel to each other. In that manner, the threaded rods will contact the pole end at said distance.

In other words, the two contact points between the threaded rods and the pole end are spaced apart by said distance, thereby improving the stability of the fixation of the luminaire pole. Indeed, a further undesirable movement of the luminaire pole inside the tubular portion is prevented thanks to the use of two spaced apart contact points between the threaded rods and the pole end.

According to a preferred embodiment, the two threaded bores are aligned along a line parallel to an axis of the tubular portion.

According to a preferred embodiment, at least in the second position, a distance between the support and the pole end is less than half of a length of the two threaded rods inside the tubular portion.

In this way, it is ensured that the free length of the two threaded rods is reduced at least in the second position, which corresponds to a lower position of the support inside the tubular portion, thereby reducing a bending of the two threaded rods.

According to a preferred embodiment, a height of the tubular portion is equally divided in an upper portion, a middle portion, and a lower portion. The first position of the support is in said upper portion and the second position of the support is in said middle portion. According to a preferred embodiment, the inner surface of the tubular portion comprises two first guiding elements configured to guide the support in said first position, and/or two second guiding elements configured to guide the support in said second position.

According to a preferred embodiment, the support is a plate provided with the two threaded bores.

According to a preferred embodiment, seen in a cross section of the tubular portion, the largest dimension of the tubular portion is at least 30% larger, preferably at least 50% larger than the second diameter.

In this way, the second diameter being smaller than the first diameter, it is ensured that luminaire poles having diameters ranging from the second diameter up to at least 30% larger than the second diameter may be fixed to the luminaire head using the fixation system of the invention.

According to a fifth aspect of the invention, there is provided a method for attaching a luminaire head of a luminaire, preferably an outdoor luminaire, to a luminaire pole with a fixation system of any one of the previous embodiments. The method comprises positioning the support in the first position corresponding to the first diameter of the luminaire pole or in the second position corresponding to the second diameter of the luminaire pole, contacting the pole end to the inner surface of the tubular portion in order to support the pole end (E) in at least two support points located on opposite sides of a plane extending through the two threaded rods, and fastening the luminaire pole to the tubular portion by receiving and moving the two threaded rods in the two threaded bores in order to contact the pole end.

The skilled person will understand that the hereinabove described technical considerations and advantages for the luminaire embodiments also apply to the below described corresponding method embodiments, mutatis mutandis.

According to a preferred embodiment, the method further comprises receiving the two threaded rods in two holes of the tubular portion.

According to an exemplary embodiment, the contacting of the pole end comprises contacting the pole end to at least two adjacent faces of the inner surface of the tubular portion. According to another exemplary embodiment, at least one face of the inner surface of the tubular portion comprises a blocking means, and the contacting of the pole end comprises contacting the pole end to the blocking means.

According to a preferred embodiment, the receiving of the two threaded rods in the two threaded bores is performed at a distance from each other, and the contacting of the two threaded rods to the pole end is performed at said distance.

According to a preferred embodiment, the positioning of the support in at least the second position comprises positioning the support at a distance from the pole end that is less than half of a length of the two threaded rods inside the tubular portion.

According to a preferred embodiment wherein the inner surface of the tubular portion is provided with two first guiding elements and/or two second guiding elements, the method further comprises guiding the support in said first position using the two first guiding elements, and/or guiding the support in said second position using the two second guiding elements.

The skilled person understand that in some embodiments the aspects described above may be combined and that the various preferred features may be combined in many different ways in further developed embodiments.

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 a currently preferred embodiment of the invention. Like numbers refer to like features throughout the drawings.

Figures 1A-1D are side views illustrating schematically an exemplary embodiment of an angle adjustment and rotation system for a luminaire;

Figures 2 A and 2B show enlarged side views of the exemplary embodiment of Figures 1A-1D;

Figures 3A-3C show a front view and two enlarged side views of the exemplary embodiment of Figures 1A-1D with the locking element in its first state;

Figures 3D-3F show a front view and two enlarged side views of the exemplary embodiment of Figures 1A-1D with the locking element in one of its plurality of second states;

Figures 4A and 4B are perspective views of an exemplary embodiment of a locking element of an angle adjustment and rotation system for a luminaire; Figure 5 shows a side view of an exemplary embodiment of a luminaire;

Figure 6A-6D illustrate different perspective views of an exemplary embodiment of a fixation system for a luminaire; and

Figures 7A-7C illustrate different views of another exemplary embodiment of a fixation system for a luminaire; and

Figures 8A-8B show schematically a first and a second side view of another exemplary embodiment of an angle adjustment and rotation system for a luminaire in a first and a second position, respectively.

DESCRIPTION OF THE EMBODIMENTS

Figures 1A-1D illustrate schematically an exemplary embodiment of an angle adjustment and rotation system for a luminaire, preferably an outdoor luminaire.

The angle adjustment and rotation system 1 illustrated in Figures 1A-1D comprises a first element 100, a second element 200, a pivot element 300, and a locking element 400. The first element 100 is configured to be attachable to a luminaire pole 11, and comprises a tubular portion 110 extending along a first axis Al (see Figures 1C and ID). The second element 200 is configured to be attachable to a luminaire head 12, and comprises a receiving portion 210 delimited by an edge portion 211 and cooperating with an end of the tubular portion 110. The pivot element 300 may be configured to pass through the first element 100 and the second element 200. The receiving portion 210 and the pivot element 300 are configured and arranged to enable a rotation movement of the second element 200 relative to the first element 100 around a pivot axis A3 perpendicular to the first axis Al (see Figures 1C and ID). The locking element 400 is configured to be in a first state wherein it enables the rotation movement of the second element 200, and in a plurality of second states wherein it blocks said rotation movement. The locking element 400 comprises an engagement portion 411 configured not to be in contact with the edge portion 211 in said first state, and to cooperate with the edge portion 211 in said plurality of second states in order to lock the second element 200 with respect to the first element 100. A shape of the engagement portion 411 and a shape of the edge portion 211 may be complementary in said plurality of second states.

As illustrated in Figures 1A-1D, the tubular portion 110 may be a hollow tube having a substantially polygonal cross section, preferably a substantially rectangular cross section, preferably a substantially square cross section. The end of the tubular portion 110 may be received in the receiving portion 210. The receiving portion 210 may be delimited by at least two side walls through which the pivot element 300 passes. Preferably, the receiving portion 210 is a U-shaped portion comprising a base wall, here a top wall 214 and said two side walls 215, 216. The edge portion 211 may be provided to an edge of one of the two side walls. The edge portion 211 may comprise a substantially circular section provided with a plurality of protrusions configured to form complementary surfaces for the locking element 400.

As illustrated in Figures 1C and ID, the second element 200 may extend along a second axis A2 and may be configured to adjust an angle between the first axis Al and the second axis A2 within a range of at least 90°. The plurality of second states may comprise a first locked position wherein the second element 200 is substantially perpendicular to the first element 100 (see Figures 1A and 1C), and a second locked position wherein the second element 200 is substantially parallel to the first element 100 (see Figures IB and ID). The first locked position may be referred to as “post-top position”, whereas the second locked position may be referred to as “side-entry position”. The locking element 400 and the edge portion 211 may be configured to adjust a position of the second element 200 relative to the first element 100 in a plurality of first positions near said first locked position and in a plurality of second positions near said second locked position.

Figures 2A and 2B are enlarged side views of the exemplary embodiment of Figures 1A-1D.

As illustrated in Figures 2A and 2B, the plurality of second states may comprise a first locked position wherein the second element 200 is substantially perpendicular to the first element 100 (see Figure 2A), and a second locked position wherein the second element 200 is substantially parallel to the first element 100 (see Figure 2B). The first locked position corresponds to the post-top position of Figures 1A and 1C, whereas the second locked position corresponds to the side-entry position of Figures IB and ID. The locking element 400 and the edge portion 211 may be configured to adjust a position of the second element 200 relative to the first element 100 in a plurality of first positions near said first locked position and in a plurality of second positions near said second locked position.

As illustrated in Figures 2 A and 2B, the receiving portion 210 may be delimited by at least two side walls through which the pivot element 300 passes. Preferably, the receiving portion 210 is a U-shaped portion comprising a base wall and said two side walls. The edge portion 211 may be provided to an edge of one of the two side walls. An outer side of the tubular portion 110 may be provided with visual indications 111 of the possible angular orientations of the second element 200 relative to the first element 100. The visual indications 111 may be configured to cooperate with at least one visual indication 213 provided to an edge of one of the two side walls opposite the edge provided with the edge portion 211. Figures 3A-3C show enlarged views of the exemplary embodiment of Figures 1A-1D with the locking element in its first state. Figure 3C is a cross-sectional view of Figure 3B along the tubular portion 110 of the first element 100.

Figures 3D-3F show enlarged views of the exemplary embodiment of Figures 1A-1D with the locking element in one of its plurality of second states. Figure 3F is a cross-sectional view of Figure 3E along the tubular portion 110 of the first element 100.

As illustrated in Figures 3A-3F, the edge portion 211 may comprise a plurality of teeth 212. The locking element 400 may be configured in its plurality of second states (see Figures 3D-3F) to enable the engagement of the engagement portion 411 with the plurality of teeth 212, and in its first state (see Figures 3A-3C) to enable the release of the engagement portion 411 such that said rotation movement of the second element 200 is enabled around said pivot axis A3 (see Figures 1C and ID). The size, shape, and position of the plurality of teeth 212 may enable the fixation of the second element 200 to the first element 100 in the plurality of second states of the locking element 400 in a plurality of positions. Figure 3F illustrates one of said plurality of positions. Two adjacent positions may be rotated along the pivot axis A3 over an angle of 10°, preferably over an angle of 5°. Figures 2A and 2B illustrate an angle of 5° between two adjacent positions near the first and second locked positions, respectively. The locking element 400 and the edge portion 211 are configured to adjust a position of the second element 200 relative to the first element 100 in five first positions near said first locked position and in five second positions near said second locked position. Accordingly, the outer side of the tubular portion 110 is provided with five visual indications 111 of the possible angular orientations of the second element 200 relative to the first element 100, from -15° to +5° by steps of 5°. The visual indications 111 are configured to cooperate with two visual indications 213, one for each of the first and second locked positions, provided to the edge of one of the two side walls opposite the edge provided with the edge portion 211. The visual indication 213 of Figure 2 A indicates an angle of -5° in the first locked position, and the visual indication 213 of Figure 2B indicates an angle of 0° in the second locked position.

As illustrated in Figures 3A-3F, the locking element 400 may pass through the first element 100 and the engagement portion 411 may be provided with at least two flat surfaces 412 (see Figure 3F) configured to cooperate with the edge portion 211. The locking element 400 may comprise a bolt 410 passing through the first element 100 and an associated nut 420. The engagement portion 411 may be adjacent to the head 413 of the locking element 400 and may be in contact with a tooth of the plurality of teeth 212 in each of the plurality of second states of the locking element 400. The engagement portion 411 may have a substantially polygonal shape, preferably a substantially square shape as illustrated in Figure 3F. The tubular portion 110 may comprise a hole H (see Figure 3C) through which the locking element 400 may pass, and a shape of the locking element 400 may be such that the engagement portion 411 is locked in the hole H in said plurality of second states. The hole H may have a non-rotational-symmetric shape configured to match a non- rotational-symmetric shape of the engagement portion 411. As seen in Figures 3A and 3D, the attaching element 300 may comprise a bolt 310 extending through the tubular portion 110 and the receiving portion 210 and an associated nut 320.

Figures 3A-3F illustrate a method for controlling an orientation of a luminaire head (not shown; see element 12 of Figure 5) connected to a luminaire pole (not shown; see element 11 of Figures 1A, IB, and 5) with the angle adjustment and rotation system 1 of Figures 1A-2B. The method comprises rotating the second element 200 relative to the first element 100 around the pivot axis A3 in order to control the orientation of the luminaire head. The method may further comprise, before the rotation movement, moving the engagement portion 411 in a direction away from the tubular portion 110 (see Figure 3 A) such that the rotation movement of the second element 200 relative to the first element 100 is enabled in the first state of the locking element 400. The method may further comprise, after the rotation movement, moving the engagement portion 411 towards the tubular portion 110 (see Figure 3D) such that the rotation movement of the second element 200 relative to the first element 100 is blocked in one the plurality of second states of the locking element 400. The method may further comprise moving the locking element 400 towards the tubular portion 110 such that the hole H surrounds at least a part of the engagement portion 411 and locks the engagement portion 411.

Figures 4A and 4B illustrate an exemplary embodiment of a locking element of an angle adjustment and rotation system for a luminaire.

As illustrated in Figures 4A and 4B, the engagement portion 411 may be provided with at least two flat surfaces 412 configured to cooperate with the edge portion (see element 211 of Figure 3F). A shape of the engagement portion 411 and a shape of the edge portion may be complementary in the above-mentioned plurality of second states of the locking element 400. The locking element 400 may comprise a bolt 410 and an associated nut 420. The engagement portion 411 may be adjacent to the head 413 of the locking element 400. The engagement portion 411 may have a substantially polygonal shape, preferably a substantially square shape as illustrated in Figures 4A and 4B where four flat surfaces 412 are represented. The locking element 400 may pass through a hole (see element H of Figure 3C) of the tubular portion 110, and a shape of the locking element 400 may be such that the engagement portion 411 is locked in the hole in said plurality of second states. Said hole may have a non-rotational-symmetric shape configured to match a non-rotational-symmetric shape of the engagement portion 411. The locking element 400 may be e.g. a DIN 603 mushroom head square neck bolt.

Figure 5 shows a side view of an exemplary embodiment of a luminaire.

The luminaire 10 comprises a luminaire head 12 and a fixation system 1’ configured to attach the luminaire head 12 to a luminaire pole 11. The fixation system 1’ may correspond to the angle adjustment and rotation system 1 of the embodiments of Figures 1A-3F. In other embodiments, the fixation system 1’ may be different from the angle adjustment and rotation system 1 of the embodiments of Figures 1A-3F, as illustrated in Figure 5. The fixation system 1’ of Figure 5 may comprise a first element 100’ and a second element 200’ cooperating with the first element 100’. The first element 100’ of Figure 5 may be similar or different from the first element 100 of Figures 1A-3F. The second element 200’ of Figure 5 may be similar or different from the second element 200 of Figures 1 A-3F. Also, the cooperation between the first element 100’ and the second element 200’ of Figure 5 may be different from the cooperation between the first element 100 and the second element 200 of Figures 1A-3F. As illustrated in Figure 5, the first element 100’ may be attached to the luminaire pole 11, and the second element 200’ may be attached to the luminaire head 12 and may cooperate with the first element 100’. The first element 100’ may comprise a tubular portion 110 configured to receive a pole end E of the luminaire pole 11. The second element 200’ may cooperate with an end of the tubular portion 110. The tubular portion 110 may correspond to the tubular portion 110 of Figures 1 A-3F, or may correspond to a tubular portion 110 of a different configuration.

In general, the fixation system 1 ’ may correspond to any system capable of attaching the luminaire head 12 of a luminaire 10 to a luminaire pole 11. The fixation system 1’ may further correspond to any system capable of controlling an orientation of the luminaire head 12, such as the angle adjustment and rotation system 1 of Figures 1A-3F. The controlling of the orientation of the luminaire head 12 may comprise rotating the second element 200 of Figures 1A-3F relative to the first element 100 of Figures 1A-3F around the pivot axis A3 of Figures 1C and ID in order to control the orientation of the luminaire head 12. However, the controlling of the orientation of the luminaire head 12 is not limited thereto, and may comprise other operations in order to control the orientation of the luminaire head 12. As illustrated in Figure 5, the second element 200’ may be configured to be rotated relative to the first element 100’ in order to control the orientation of the luminaire head 12. In another embodiment, the second element 200’ may be configured to be atached to the first element 100’ in a fixed position. In yet another embodiment, the first element 100’ and the second element 200’ may be integrally formed, and the fixation system 1’ may comprise a single element, e.g. the first element 100’, provided with a tubular portion 110.

The luminaire head 12 may comprise a light source 121. Preferably, the light source 121 may comprise a support 122, such as a PCB, on which a plurality of light emitting diodes (LEDs) is mounted. The LEDs may be arranged in an array of multiple columns and rows. The luminaire head 12 may be provided with a heat sink (not shown) including a plurality of cooling fins. One or more optical elements may be associated with the light source 121. The one or more optical elements may comprise a plurality of lens elements associated with the plurality of LEDs, e.g. grouped in a lens plate (not shown). The luminaire head 12 may further comprise a transparent or translucent portion 123 facing the light source 121. Optionally, a color filter may be arranged between the light source 121 and the transparent or translucent portion 123. For example, the color filter may be a sheet arranged above the transparent or translucent portion 123. Preferably, the color filter may be accessible by opening the luminaire head 12.

In addition, the luminaire head 12 may comprise an electronic assembly (not shown). Preferably, the electronic assembly may comprise any one or more of the following: a light source dimming means, surge protection circuitry, electrostatic discharge (ESD) protection circuitry, connecting means, a fuse, a driving and/or control circuitry for any electrical components of the luminaire head 12. Optionally, a flux exhauster may be arranged at a side of the luminaire head 12, around the light source 121.

As illustrated in Figure 5, the luminaire head 12 may comprise a housing wherein the light source 121, the electronic assembly, and optionally the heat sink and the flux exhauster may be arranged. The transparent or translucent portion 123 facing the light source 121 may be part of the housing. Also, the housing may comprise an upper cover 124 configured to cover and protect the components of the luminaire head 12 inside the housing. Preferably, the transparent or translucent portion 123 and the upper cover 124 form a sealed housing, as illustrated in Figure 5. In some embodiments, the luminaire head 12 can have an overall round shape, i.e., any one or more of the components of the luminaire head 12 may have a round shape. In other embodiments, such as in the embodiment of Figure 5, the luminaire head 12 may have an overall polygonal shape, such as a square or rectangular shape. Thus, any one or more of the components of the luminaire head 12 may have a polygonal shape. Also mixed shapes are possible. Figure 6A-6D illustrate different views of an exemplary embodiment of a fixation system for a luminaire.

As illustrated in Figures 6A-6D, the fixation system 1’ comprises a tubular portion 110, two threaded rods 510, 520 extending through the tubular portion 110, and a support 600. The tubular portion 110 is configured to receive a pole end E of a luminaire pole 11. The support 600 is configured to be arranged inside the tubular portion 110 and is provided with two threaded bores 610, 620 for receiving the two threaded rods 510, 520. An inner surface of the tubular portion 110 is configured to contact the pole end E to support the pole end (E) in at least two support points located on opposite sides of a plane extending through the two threaded rods 510, 520, and to prevent a movement thereof inside the tubular portion 110. It is noted that the at least two support points located on opposite sides of a plane extending through the two threaded rods 510, 520 comprise in the embodiment of figure 6C two first support points 125a on a first side of said plane and two second support points 125b on a second opposite side of the plane. Further, it will be understood that the support points 125a, 125b may be part of a larger support area, e.g. a support surface or a line.

The support 600 and the tubular portion 110 are configured such that the threaded rods 510, 520 can fix a first diameter DI (see Figure 6 A) of the luminaire pole 11 and a second diameter D2 (see Figure 6B) of the luminaire pole 11 different from the first diameter DI. The support 600 and the tubular portion 110 may be configured such that the support 600 can be in a first position (see Figure 6 A) corresponding to the first diameter DI, and in a second position (see Figure 6B) corresponding to the second diameter D2. The first diameter DI may be larger than the second diameter D2, and the first position may be different from the second position, as illustrated in Figures 6 A and 6B. For example, the first diameter DI may correspond to 76 mm, and the second diameter D2 may correspond to 32 mm. As another example, the first diameter DI may correspond to 60 mm, and the second diameter D2 may correspond to 42 mm, as illustrated in Figures 7A and 7B. It should be clear for the skilled person that the number of positions is not limited to two different positions. For example, the support 600 and the tubular portion 110 may be configured such that the support 600 can be in a plurality of positions corresponding to a plurality of diameters of the luminaire pole 11. The plurality of positions may correspond to a plurality of intermediate positions between the first position and the second position. Also, it should be clear for the skilled person that the number of diameters is not limited to two different diameters. For example, the support 600 and the tubular portion 110 may be configured such that the support 600 can fix a plurality of diameters of the luminaire pole. The plurality of diameters may correspond to a plurality of intermediate diameters between the first diameter DI and the second diameter D2. As illustrated in Figures 6 A and 6B, the support 600 may be a plate provided with the two threaded bores 610, 620 (see Figure 6B). The support 600 may be a separate piece configured to be supported on the inner surface of the tubular portion 110. The inner surface of the tubular portion 110 may comprise two first guiding elements 131, 132 configured to guide the support 600 in said first position (see Figure 6A), and two second guiding elements 141, 142 configured to guide the support 600 in said second position (see Figure 6B). The tubular portion 110 may be a hollow tube having a substantially polygonal cross section, preferably a substantially rectangular cross section, more preferably a substantially square cross section. The tubular portion 110 may correspond to or be different from the tubular portion 110 of the embodiments of Figures 1 A-3F.

As illustrated in Figures 6A-6D, the tubular portion 110 may be provided with two holes Hl, H2 (see Figure 6D) configured to receive the two threaded rods 510, 520. In the embodiment of Figures 6A-6D, at least one face 111 of the inner surface of the tubular portion 110 comprises a blocking means 120 (see Figure 6C) configured to prevent the movement of the luminaire pole 11. The blocking means 120 may comprise two blocking elements 121, 122 configured to be arranged at either side of the pole end E. The blocking elements 121, 122 provide the above described support points 125a, 125b. Said two holes Hl, H2 may be provided at a face 113 of the tubular portion 110 opposite said at least one face 111. Although Figures 6A-6D illustrate two holes Hl, H2, it should be clear for the skilled person that the number of holes is not limited thereto. For example, three holes may be provided to the tubular portion 110. Accordingly, three threaded rods may extend through the tubular portion 110, and the support 600 may be provided with three threaded bores for receiving the three threaded rods.

As illustrated in Figures 6A-6D, the two threaded rods 510, 520 may be received in the corresponding two threaded bores 610, 620 at a distance D from each other (see Figure 6D), and said threaded rods 510, 520 contact the pole end E at said distance D. The two threaded bores 610, 620 may be aligned along a line parallel to an axis of the tubular portion 110 (see Figure 6D). At least in the second position, a distance between the support 600 and the pole end E may be less than half of a length L2 of the two threaded rods 510, 520 inside the tubular portion 110 (see Figure 6B). A height of the tubular portion 110 may be equally divided in an upper portion, a middle portion, and a lower portion. The first position of the support 600 may be in said upper portion (see Figure 6A) and the second position of the support 600 may be in said middle portion (see Figure 6B). Seen in a cross section of the tubular portion 110, the largest dimension of the tubular portion 110 may be at least 30% larger than the second diameter D2 (see Figure 6B). For example, the tubular portion 110 may be a hollow tube having a square cross section with dimensions 70 x 70 mm.

Figures 7A-7C illustrate different views of another exemplary embodiment of a fixation system for a luminaire.

As illustrated in Figures 7A-7C, the fixation system 1’ comprises a tubular portion 110, two threaded rods 510, 520 extending through the tubular portion 110, and a support 600. The tubular portion 110 is configured to receive a pole end E of a luminaire pole 11. The support 600 is configured to be arranged inside the tubular portion 110 and is provided with two threaded bores 610, 620 (see Figure 7C) for receiving the two threaded rods 510, 520. An inner surface of the tubular portion 110 is configured to contact the pole end E and to prevent a movement thereof inside the tubular portion 110. The support 600 and the tubular portion 110 are configured such that the threaded rods 510, 520 can fix a first diameter DI (see Figure 7A) of the luminaire pole 11 and a second diameter D2 (see Figure 7B) of the luminaire pole 11 different from the first diameter DI. The support 600 and the tubular portion 110 may be configured such that the support 600 can be in a first position (see Figure 7 A) corresponding to the first diameter DI, and in a second position (see Figure 7B) corresponding to the second diameter D2. The first diameter DI may be larger than the second diameter D2, and the first position may be the same as the second position, as illustrated in Figures 7A and 7B. For example, the first diameter DI may correspond to 60 mm, and the second diameter D2 may correspond to 42 mm. As another example, the first diameter DI may correspond to 76 mm, and the second diameter D2 may correspond to 32 mm, as illustrated in Figures 6 A and 6B.

As illustrated in Figures 7A-7C, the support 600 may be a plate provided with the two threaded bores 610, 620 (see Figure 7C). The support 600 may be a separate piece configured to be supported on the inner surface of the tubular portion 110. The tubular portion 110 may be a hollow tube having a substantially polygonal cross section, preferably a substantially rectangular cross section, more preferably a substantially square cross section. The tubular portion 110 may correspond to or be different from the tubular portion 110 of the embodiments of Figures 1 A-3F.

The tubular portion 110 may be provided with two holes (not visible on Figures 7A and 7B) configured to receive the two threaded rods 510, 520. In the embodiment of Figures 7A-7C, at least two adjacent faces 111, 112 of the inner surface of the tubular portion 110 are configured to contact the pole end E in support points 125a, 125b (on either side of a plane extending through the rods 510, 520), and to prevent the movement of the luminaire pole 11. The at least two adjacent faces 111, 112 of the inner surface of the tubular portion 110 may be oriented at an angle between 60° and 120° with respect to each other, preferably at an angle of substantially 90° with respect to each other as illustrated in Figures 7A and 7B. Said two holes may be provided at an edge of the tubular portion 110 facing said at least two adjacent faces 111, 112.

As illustrated in Figures 7A-7C, the two threaded rods 510, 520 may be received in the corresponding two threaded bores 610, 620 at a distance D from each other (see Figure 7C), and said threaded rods 510, 520 contact the pole end E at said distance D. The two threaded bores 610, 620 may be aligned along a line parallel to an axis of the tubular portion 110 (see Figures 7A and 7B). A height of the tubular portion 110 may be equally divided in an upper portion, a middle portion, and a lower portion. The first position of the support 600 may be in said upper portion (see Figure 6A) and the second position of the support 600 may also be in said upper portion (see Figure 6B). Seen in a cross section of the tubular portion 110, the largest dimension of the tubular portion 110 may be at least 30% larger than the second diameter D2 (see Figure 7B). For example, the tubular portion 110 may be a hollow tube having a square cross section with dimensions 70 x 70 mm.

Figures 6A-6D and Figures 7A-7C illustrate a method for attaching a luminaire head of a luminaire (not shown; see elements 12 and 10 of Figure 5) to a luminaire pole (not shown; see element 11 of Figures 1A, IB, and 5) with the fixation system 1’ of Figures 6A-6D or Figures 7A-7C. The method comprises positioning the support 600 in the first position corresponding to the first diameter DI of the luminaire pole 11 or in the second position corresponding to the second diameter D2 of the luminaire pole 11 , contacting the pole end E to the inner surface of the tubular portion 110 in order to prevent a movement thereof inside the tubular portion 110, and fastening the luminaire pole 11 to the tubular portion 110 by receiving and moving the two threaded rods 510, 520 in the two threaded bores 610, 620 in order to contact the pole end E. The method may further comprise contacting the pole end E to a blocking means 120 of the inner surface of the tubular portion 110, and preventing the movement of the luminaire pole 11 (see Figures 6A-6D). Alternatively, the method may further comprise contacting the pole end E to at least two adjacent faces 111, 112 of the inner surface of the tubular portion 110 and preventing the movement of the luminaire pole 11 (see Figures 7A-7C). In relation with the embodiment of Figures 6A-6D, the positioning of the support 600 in at least the second position may comprise positioning the support 600 at a distance from the pole end E that is less than half of a length L2 of the two threaded rods 510, 520 inside the tubular portion 110 (see Figure 6B). The method may further comprise guiding the support 600 in said first position using the two first guiding elements 131, 132 of the inner surface of the tubular portion 110, and guiding the support 600 in said second position using the two second guiding elements 141, 142 of the inner surface of the tubular portion 110.

Figures 8A and 8B illustrate another embodiment of an angle adjustment and rotation system 1 for a luminaire. The angle adjustment and rotation system 1 comprises a first element 100 configured to be attachable to a luminaire pole, a second element 200 configured to be attachable to a luminaire head, a pivot element 300, and a locking element 400.

The first element comprises a tubular portion 110 extending along a first axis Al. The second element 200 is coupled to an end of the tubular portion 110. The first element is provided with an edge portion 211. The first and second element 100, 200 and the pivot element 300 are configured and arranged to enable a rotation movement of the second element 200 relative to the first element 100 around a pivot axis A3 perpendicular to the first axis Al. The locking element 400 is configured to be in a first state wherein it enables the rotation movement of the second element 200, and in a plurality of second states along the edge portion, wherein it blocks said rotation movement, in a similar way as has been described above for Figures 3A-3C, with this difference that the locking element extends through a hole in the second element 200. The locking element 400 comprises an engagement portion configured not to be in contact with the edge portion 211 in said first state, and to cooperate with the edge portion 211 in said plurality of second states in order to lock the second element 200 with respect to the first element 100. The engagement portion is not visible in Figures 8A and 8B but the locking element 400 may be identical or similar to the locking element 400 described above in connection with Figures 4A and 4B.

In the embodiment of figures 8 A and 8B the first element 100 is provided with an open side shaped as a receiving portion for receiving an insert portion of the second element 200. In a similar way as described above for the embodiment of figures 1A-1D, the receiving portion may have two sidewalls. Here the receiving portion is part of the first element 100 and may have an open top.

As illustrated in Figures 8 A and 8B, the second element 200 may extend along a second axis A2 and may be configured to adjust an angle between the first axis Al and the second axis A2 within a range of at least 90°. The plurality of second states may comprise a first locked position wherein the second element 200 is substantially perpendicular to the first element 100 (see Figure 8B), and a second locked position wherein the second element 200 is substantially parallel to the first element 100 (see Figure 8A). The first locked position may be referred to as “post-top position”, whereas the second locked position may be referred to as “side -entry position”. Whilst the principles of the invention have been set out above in connection with specific embodiments, it is to be 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.