EP3862629A1 - Lamp - Google Patents

Abstract

The present invention relates to a lamp (100), preferably a spot lamp, comprising [i] a first lamp body (10) with a first rotary axis section (11), and [ii] a second lamp body (20) with a second rotary axis section (21 ), wherein the first axis of rotation section (11) and the second axis of rotation section (21) are rotatably connected to one another about an axis of rotation (A), and wherein the first axis of rotation section (11) and the second axis of rotation section (21) with respect to the axis of rotation (A) in one Axially overlap rotary section (S), [iii] a sealing means (50), the sealing means (50) being arranged in the rotary section (S) radially between and in sealing contact with the first rotary axis section (11) and the second rotary axis section (21), [iv] a holding means (70), the holding means (70) connecting the first lamp body (10) and the second lamp body (20) rotatably in such a way that the sealing system is independent of a rotational position of the lamp body rper (10, 20) to each other is maintained.

Description

The invention relates to a lamp, preferably a spot lamp, with lamp bodies rotatably connected to one another.

Luminaires of the type mentioned at the outset are known from the prior art, in which luminaire bodies are preferably rotatably connected to one another in series in order to set different light emission directions. A first axis of rotation can be provided for the rotatable connection of two adjacent lamp bodies; for example. To provide an axis of rotation for rotating the two lamp bodies relative to one another. Depending on requirements and the desired flexibility, a second or further axis of rotation can also be provided between one of the lamp bodies with another, which is preferably aligned transversely to the first axis of rotation, in order to give the lamp overall more degrees of freedom with regard to the direction of light emission. The rotatable connection of the luminaire body - whether with one or two or more axes of rotation - creates an articulation point for each axis of rotation, for which there may be a need for an external seal. It is often desirable to prevent foreign bodies from entering the luminaire. Such foreign bodies represent, for example, dust or water, for example due to rain or water vapor or creeping water.

It is therefore known to arrange a seal between the rotatably connected lamp bodies, which seal is subjected to a normal force by tightening a screw in the direction of the axis of rotation, so that it has a sealing effect due to this normal force. By tightening the screw, the rotational position of the luminous bodies is fixed to one another at the same time. To change the rotary position, the screw can be loosened, the lamp bodies can be rotated towards each other and the screw can be fixed again in the desired position so that the sealing effect of the seal loosened during the adjustment process is restored. This requires the screw to be properly tightened with a tool to ensure that the luminaire is sealed.

The object of the present invention is therefore to provide a lamp, preferably a spot lamp, of the type mentioned at the beginning, which can be changed or adjusted in its light emission direction easily and safely.

This problem is solved by the subject matter of the independent claim. The dependent claims develop the central concept of the invention in a particularly advantageous manner.

The present invention therefore relates to a lamp, preferably a spot lamp. The lamp has a first lamp body with a first axis of rotation section and a second lamp body with a second axis of rotation section. The first axis of rotation section and the second axis of rotation section are rotatably connected to one another about an axis of rotation. The first rotation axis section and the second rotation axis section overlap axially with respect to the rotation axis in a rotation section. The luminaire also has a sealing means, the sealing means being arranged in the rotary section radially between and in sealing contact with the first rotary axis section and the second rotary axis section. Furthermore, the luminaire has a holding means, the holding means connecting the first luminaire body and the second luminaire body in such a rotatable manner (hence a connection which further enables a relative rotation of the two luminaire bodies rotatably connected via the rotary axis sections) so that the sealing system is independent of a rotational position of the (so connected) lamp bodies to each other is maintained.

With the lamp according to the invention it is possible to provide a reliable sealing effect independently of a rotary actuation or the relative rotary position of the lamp bodies to one another. Since the sealing means is provided radially between the first and second lamp body in such a way that it is in sealing contact with both lamp bodies, a change in the rotational position of the lamp body about the axis of rotation does not affect the sealing effect. It can be preferred that the sealing means is provided concentrically with respect to the axis of rotation. For example, a degree of compression of the seal remains above a threshold value necessary for the sealing effect in each rotational position that can be achieved. The degree of compression of the seal preferably does not change during the rotation, so that the seal is in essentially constant contact with the rotational axis sections. Maintaining the sealing effect independently of the rotational position of the lamp bodies relative to one another around the axis of rotation also enables a holding function that can be adjusted as required in accordance with the sealing force and depending on the use of the sealant. A corresponding holding or inhibiting function can thus be achieved by means of the sealing means and / or the holding means. Since the holding means also connects the lamp bodies to one another in a rotatable manner, the holding means do not have to be released in order to adjust the rotational position of the lamp bodies relative to one another.

The sealing function is thus permanently maintained; this regardless of a rotational position of the lamp bodies relative to one another and an adjustment actuation by an operator.

The luminaire can furthermore have a third luminaire body with a third axis of rotation section, the second luminaire body further preferably having a fourth axis of rotation section and wherein the third axis of rotation section and the fourth axis of rotation section are preferably connected to one another so as to be rotatable about a further axis of rotation. The third rotation axis section and the fourth rotation axis section preferably overlap axially with respect to the rotation axis in a further rotation section. The luminaire then preferably also has a further sealing means, the further sealing means being arranged in the further rotary section radially between and in sealing contact with the third rotary axis section and the fourth rotary axis section. The luminaire preferably also has a further holding means, the further holding means then connecting the third luminaire body and the second luminaire body in such a rotatable manner (hence a connection which further enables a relative rotation of the two luminaire bodies rotatably connected via the rotary axis sections), so that the Sealing system is maintained regardless of a rotational position of the (connected) lamp bodies to each other. The lamp can also have further lamp bodies. The lamp bodies are then preferably arranged in series one behind the other, with lamp bodies that are adjacent to one another then preferably being connected to one another in the manner described above so as to be rotatable. The axes of rotation are preferably not oriented parallel to one another, particularly preferably oriented transversely or orthogonally to one another.

By providing a luminaire with three or more luminaire bodies, the flexibility of the luminaire can be increased. This is particularly advantageous if two different, non-parallel axes of rotation are provided. This increases the degrees of freedom of the rotational positions that can be realized with the lamp, which enables more flexible use of the lamp with extended light emission directions and improved illumination.

The first lamp body and the second lamp body and, if present, preferably also the second lamp body and the third lamp body, are preferably connected to one another at least in a non-positive manner and more preferably also releasably in a form-fitting manner.

By providing the described non-positive connection, on the one hand the connected lamp bodies can be held in the desired rotating or pivoting position. In addition, the sealing function on the one hand and the holding function on the other hand can be largely decoupled from one another. This is independent of the rotational position of the lamp bodies in relation to one another. The releasable interlocking connection enables a defined and secure positioning of the rotatably connected lamp bodies relative to one another. Due to their detachable design, the rotary function can be implemented optionally.

The holding means preferably connects the first lamp body and the second lamp body in such a way as to maintain the non-positive connection between them regardless of a rotational position of the lamp bodies relative to one another. If present, the further holding means preferably connects the third lamp body and the second lamp body in such a way as to maintain the non-positive connection between them, regardless of a rotational position of the lamp bodies relative to one another.

Since the non-positive connection is taken over by the holding element, the luminaire can be designed to be particularly simple overall. In addition, the holding means (s) can be implemented in a particularly simple manner by means of a force-fit connection of the lamp bodies. It is thus preferred that the holding means provide a frictional force between the lamp bodies in order to generate a holding frictional torque. Essentially any rotational positions can be set by means of a non-positive connection.

The holding means preferably also has corresponding locking means in order to provide the form-fitting connection between the first lamp body and the second lamp body, wherein preferably, if present, the further holding means also has corresponding further blocking means in order to establish the form-fitting connection between the third lamp body and the second lamp body provide. The locking means or the further locking means is preferably designed in such a way as to fix the connected lamp bodies in at least one or a defined number of rotational positions around the assigned axis of rotation, the locking means or the further locking means having a pair of teeth.

Since the releasable form-fitting connection is also provided by the holding means, the construction of the lamp is further simplified. By providing the holding means, different functions (connecting the lamp bodies to one another, Holding in a defined rotational position, locking with respect to the rotational position) implemented in one component. By providing the locking means, for example in the form of a pair of teeth, defined rotational positions can be set. This enables a reproducible setting of rotary positions.

The locking means or the further locking means is preferably designed in such a way as to fix the connected lamp bodies in at least one or a defined number of rotational positions around the assigned axis of rotation. The locking means or the further locking means can have a pair of teeth. Preferably, the holding means or the further holding means has biasing means, preferably a spring element (e.g. spiral spring, plate spring and the like), in order to bias the connected lamp bodies by means of spring force towards the non-positive and preferably also form-fitting connection.

By means of the pretensioning means described, the (non-positive or positive) connection can be implemented and maintained in a particularly simple and secure manner. The use of a spring element to achieve the preload is a particularly favorable and structurally simple means to be integrated into the luminaire.

The connected lamp bodies are preferably provided axially movable against the spring force in order to release the non-positive and, if present, preferably also the positive connection, for example to move the lamp body into a different rotational position.

In this way, the non-positive and preferably also the positive connection can be selectively reduced or dissolved in a simple manner, in order thus to rotate the rotatably connected lamp bodies relative to one another in a particularly simple manner.

The first lamp body and the second lamp body and, if present, preferably also the third lamp body can preferably each delimit an inner cavity.

The provision of an internal cavity can advantageously be used to accommodate elements therein. These elements can thus be accommodated safely and securely without affecting the external appearance of the luminaire. Any shapes and, if necessary, a particularly high stability of the luminaire with low weight can also be realized in this way.

The cavities of adjacent lamp bodies can preferably be connected to one another. The sealing means and, if present, the further sealing means can preferably seal the cavities connected in this way to the outside with respect to the respective rotary sections.

By connecting the inner cavities, the luminaire can be used more flexibly. In a preferred embodiment, the sealing means used are used at the same time to seal off the cavities from the outside, so that the number of parts is reduced with increased usability. Elements accommodated in these cavities can thus be easily protected against environmental influences.

Electrics and / or electronics can preferably be provided in the cavities, particularly preferably at least one cable or cable harness for the electrical supply of the lamp, which particularly preferably runs through all cavities.

The flexibility of the luminaire can thus be increased significantly since, in particular, hidden electrics and / or electronics that are safe against environmental influences can be provided in a simple manner and across luminaire bodies. Thus, for example, a normal cable that is not protected against water or dirt can also be used to supply the lamp electrically. This enables an inexpensive and optically better construction of the lamp.

The luminaire preferably additionally has a rotation-limiting device, by means of which a rotational angle range of the axis of rotation or of the further axis of rotation can be limited.

By means of the rotation-limiting device, excessive turning of lamp bodies that are rotatably connected to one another can be prevented in a safe and simple manner, which in extreme cases could result in damage to the lamp. A rotation limitation can, however, also be desired in order to be able to set only a certain angle of rotation range. Such a rotation limitation can, for example, limit rotation angle values of essentially +/- 180 ° or also essentially +/- 360 °.

One of the lamp bodies, preferably the first lamp body, can preferably have or form a lamp head for emitting light from the lamp. Additionally or alternatively, one of the lamp bodies, preferably the second lamp body or, if available, have or form the third luminaire body, a luminaire base for attaching the luminaire.

In this way, the lamp head itself can be adjusted in a simple manner in order to set a desired light emission direction. Since the lamp head itself is adjusted, a particularly precise setting can be achieved with little effort. Since one of the lamp bodies has a lamp base, the lamp can be attached in a particularly simple manner.

The lamp bodies are preferably arranged in a row one behind the other, the lamp body at one end of the row preferably forming the lamp head and the lamp body provided with respect to the lamp head at the opposite end of the row forming the lamp base, and preferably the one or more provided between the lamp head and the lamp base Luminaire body preferably have or form luminaire center body.

The luminaire can thus be designed to be particularly flexible with regard to its degrees of freedom, which enables the light emission directions to be set flexibly. This is a great advantage, especially with spot lights. The structure can also be provided in a particularly preferred manner in that the opposite lamp bodies form the lamp head for emitting light on the one hand and the lamp base for fastening the lamp on the other hand. For example, in the case of a lamp with two lamp bodies, that is to say the first and second lamp bodies, for example the first lamp body can form the lamp head and the second lamp body can form the lamp base. With three lamp bodies it is conceivable that the first lamp body forms the lamp head, the second lamp body the central lamp body and the third lamp body the lamp base.

The lamp can also have a light source, preferably an LED light source, which is provided in the first light body, preferably in the light head, and is preferably encapsulated in this.

The luminaire can be equipped directly with a light source to emit light. This is preferably provided interchangeably. In the form of an LED, a particularly simple, inexpensive and efficient lighting means can be provided. In order to ensure the tightness of the lamp and, if necessary, to protect the illuminant, the illuminant can preferably be provided encapsulated.

Fig. 1

zeigt eine Leuchte gemäß einem ersten Ausführungsbeispiel der Erfindung in einer ersten Seitenansicht,

Fig. 2

zeigt die Leuchte gemäß Figur 1 in einer zweiten Seitenansicht quer zu der ersten Seitenansicht,

Fig. 3

zeigt die Leuchte gemäß Figur 1 in einer seitlichen Schnittansicht entlang Linie III-III der Fig. 1.

Fig. 4

zeigt eine Leuchte gemäß einem weiteren Ausführungsbeispiel der Erfindung in einer seitlichen Schnittansicht vergleichbar der Schnittansicht nach Figur 3.

In the following, the invention is described and explained in more detail on the basis of the exemplary embodiments shown in the figures and further exemplary embodiments that are not shown.

Fig. 1

shows a lamp according to a first embodiment of the invention in a first side view,

Fig. 2

shows the luminaire according to Figure 1 in a second side view transversely to the first side view,

Fig. 3

shows the luminaire according to Figure 1 in a side sectional view along line III-III of Fig. 1 .

Fig. 4

shows a lamp according to a further embodiment of the invention in a side sectional view comparable to the sectional view according to FIG Figure 3 .

The figures show exemplary embodiments of the lamp 100 according to the invention. According to the exemplary embodiments, the lamp 100 has a first lamp body 10, arranged rotatably on a second lamp body 20, which in turn is arranged rotatably on a third lamp body 30. The luminaire bodies 10, 20, 30 are consequently arranged here in a row one behind the other and relatively rotatable or pivotable with respect to one another. According to the exemplary embodiments, the first luminaire body 10 is a luminaire head 10, so it is preferably used to emit light and preferably has a lighting means L, the third luminaire body 30 is a lamp base 30, so it is preferably used for fastening (e.g. flange) or stabilization (e.g. Base) of the lamp 100 in its operating position, and the second lamp body 20 is a central lamp body 20, so preferably serves to connect the lamp head 10 and lamp base 30. In principle, it is also conceivable that another or more of the lamp bodies 10, 20, 30 as the lamp head are formed or have such. The same applies to the design of the lamp bodies 10, 20, 30 as lamp bases or the presence of such a base. The luminaire 100 can thus be constructed in a particularly flexible manner. It is particularly preferred that the luminaire body (here the first luminaire body 10) at one end of the luminaire bodies 10, 20, 30, which are preferably arranged one behind the other in a row, the luminaire head (here the first luminaire body 10) and the luminaire head at the opposite end of the row provided lamp body (here the third lamp body 30) forms the lamp base.

The luminaire body (s) then possibly provided between the luminaire head and the luminaire base (here the luminaire body 20) then preferably have the luminaire central body or form it.

The luminaire 100 of the exemplary embodiments shown has an essentially cylindrical structure. The shape of the luminaire 100 or also its luminaire body 10, 20, 30 can, however, essentially be any. Furthermore, the number of lamp bodies 10, 20, 30 is not limited in number. The lamp can thus have two, three or even more lamp bodies 10, 20, 30.

In the exemplary embodiments, the lamp head 10 comprises a base body 14 which has or receives a lighting means L in a recess or depression 18 on the front here. The illuminant L can preferably be at least partially encapsulated in the first luminaire body 10. In the exemplary embodiments shown, the lamp head 10 preferably also has a cylindrical sleeve 13 here, which completely surrounds the recess 18 and the lamp L at the side and extends further than the lamp in the light emission direction (one upward direction in the figures); consequently as further than the lamp L protrudes in the light emission direction. On the one hand, the sleeve 13 can serve to protect the lighting means L and, if necessary, to optimize the light output. The latter, for example, as a side panel or, if the sleeve 13 is designed to be reflective at least on its inside 15, as a reflector. A seal 16 is preferably provided between the sleeve 13 and the base body 14 in order to seal off an inner cavity H1 delimited by the first lamp body 10 from the outside

In addition, the sleeve 13 can be used to carry further elements. In the exemplary embodiments shown, a cover 12 is placed on the end 17 opposite the lighting means L and serving as a light exit opening. This preferably carries - for example in the light exit opening 17 - a light-permeable (for example transparent) protective cover 120, which can furthermore have optical functions in that it can, for example, be designed as a lens and / or have scattering particles and / or other optical functions. The sleeve 13 and the cover 12 are preferably connected to one another in a detachable or non-detachable manner, for example screwed or glued. The connection is preferably tight, for example by inserting a seal between them or by sealing the connecting material (for example adhesive) between them.

The lighting means L of the lamp 100 can - generally and as also shown in the exemplary embodiments - be an LED lighting means. This can, for example, have an LED module with an LED board P and an LED M arranged thereon. The lighting means L can preferably have optical elements (light-influencing elements), such as here, for example, a lens in the form of a lens attachment placed on the circuit board P. As already mentioned, the lighting means L can be at least partially encapsulated in the first lamp body or lamp head 10. For this purpose, the cavity H1 can be at least partially filled in order to encapsulate the luminous means L to the outside, for example to prevent foreign bodies such as water or dust from penetrating into the luminous means L. In this way, the lamp 100 can be safely designed for outdoor use.

According to the exemplary embodiments, the luminaire center body 20 is formed, for example, from a base body 23 and a base part (here a base plate) 24, the latter being fixed to the base body 23 from below, for example by means of screws 26. According to the exemplary embodiments, the two-part configuration serves as a preferred option for the rotatable fastening of the lamp base 30 to the central lamp body 20, as will be described below. The second lamp body 20 can also delimit an inner cavity H2.

The lamp base 30 can, for example, be designed as a stand or, as shown, as a fastening element. In the embodiment of a fastening element, the lamp base 30 can, as shown, preferably have a threaded section 34 projecting downwards here with an external thread. Alternatively, the fastening element can also be designed as a fastening flange. The third lamp body 30 can also delimit an inner cavity H3.

The cavities H1, H2, H3 of adjacent lamp bodies 10, 20, 30 can preferably be connected to one another; therefore thus form a coherent cavity. Electrics and / or electronics can be provided in the cavities H1, H2, H3. For example, at least one cable or cable harness K can be provided for the electrical supply of the light 100. The cable K here preferably runs through the hollow spaces H1, H2, H3 that are continuously connected to one another.

As already mentioned, the first lamp body 10 and the second lamp body 20 are rotatably connected to one another. For this purpose, the first lamp body 10 has at least one first axis of rotation section 11 (present two first axis of rotation sections 11). In In the same way, the second lamp body section 20 has at least one second axis of rotation section 21 (in the present case two second axis of rotation sections 11). The first axis of rotation section 11 and the second axis of rotation section 21 are rotatably connected to one another about an axis of rotation A, so that the rotatable (here pivotable) connection between the first and second lamp bodies 10, 20 results. As shown, the first rotation axis section 11 and the second rotation axis section 21 overlap axially with respect to the rotation axis A in a rotation section S. In the exemplary embodiments shown, this is achieved in that the rotational axis sections 11, 21 here each have a cylindrical shape or surface and the cylinder sections thus formed are axially pushed into one another.

In a comparable manner, the second lamp body 20 and the third lamp body 30 can also be rotatably connected to one another. For this purpose, the third luminaire body 30 preferably also has at least one third axis of rotation section 31. In the same way, the second lamp body 20 also has at least one fourth axis of rotation section 22. The third axis of rotation section 31 and the fourth axis of rotation section 22 are rotatably connected to one another about a further axis of rotation B, so that the rotatable (here rotatable) connection between the second and third lamp bodies 20, 30 results. As shown, the third rotation axis section 31 and the fourth rotation axis section 22 also overlap axially with respect to the further rotation axis B in a further rotation section T. In the exemplary embodiments shown, this is achieved in that the rotational axis sections 31, 22 each have a cylindrical surface here and the cylinder sections thus formed are axially pushed into one another.

The axes of rotation A, B are preferably not arranged coaxially, more preferably not oriented in the same way. The axes of rotation A, B are preferably oriented transversely or orthogonally to one another in order to provide the light 100 as a whole with many degrees of freedom with regard to its mobility (rotatability; rotation; pivotability). However, depending on the requirement, an essentially arbitrary arrangement or orientation of the axes of rotation A, B with respect to one another is conceivable.

The luminaire 100 also has a sealing means 50, which is arranged in the rotary section S radially between and in sealing contact with the first rotary axis section 11 and the second rotary axis section 21. If the illustrated third and fourth rotary sections 31, 22 are also present, the luminaire 100 can also have a further sealing means 60 have, which is arranged in the further rotary section T radially between and in sealing contact with the third rotary axis section 31 and the fourth rotary axis section 22. Sufficient friction (non-positive connection) to stabilize a set relative orientation of the lamp bodies 10, 20, 30 to one another can already be achieved by the sealing means 50, 60 themselves. This is in particular because the seal 50, 60 exerts a permanently acting elastic force on the respective lamp bodies 10, 20, 30, between which the sealing means 50, 60 is arranged. As a result, the rotatability of the respective lamp bodies 10, 20, 30 with respect to one another is inhibited, whereby a sufficient holding force is preferably provided. Particularly preferably, however, the sealing means 50, 60 serve, in particular, to seal off the respective rotary section S, T from the outside. In this way, the cavities H1, H2, H3 can particularly preferably be sealed off from the outside with respect to the respective rotary sections S, T.

The luminaire 100 furthermore has a holding means 70 which connects the first luminaire body 10 and the second luminaire body 20 to one another in such a rotatable manner (hence a connection which further enables a relative rotation of the two luminaire bodies which are rotatably connected via the rotation axis sections), so that the sealing system is maintained regardless of a rotational position of the lamp body 10, 20 to one another. The first and second lamp bodies 10, 20 are preferably connected / held to one another axially by means of the holding means 70, while they can still be rotated relative to one another about the axis of rotation A.

In a comparable way, the luminaire 100 can also have a further holding means 80 which connects the third luminaire body 30 and the second luminaire body 20 to one another in such a rotatable manner (hence a connection which further enables a relative rotation of the two luminaire bodies which are rotatably connected via the rotation axis sections), so that the sealing system is maintained regardless of a rotational position of the lamp bodies 20, 30 with respect to one another. The third and second lamp bodies 30, 20 are preferably connected / held to one another axially by means of the further holding means 80, while they can still be rotated relative to one another about the further axis of rotation B.

The first lamp body 10 and the second lamp body 20, and if present, preferably also the second lamp body 20 and the third lamp body 30, are preferably at least positively and more preferably also detachably connected to one another in a form-fitting manner. In this way, the lamp bodies 10, 20, 30 can be stabilized in a set relative rotational position to one another.

For example, for this purpose the holding means 70 can connect the first lamp body 10 and the second lamp body 20 in such a way as to maintain the non-positive connection between them regardless of a rotational position of the lamp bodies 10, 20 to one another. This is achieved via a non-positive connection area V, which, according to the illustrated embodiments, is formed by an end face of one of the cylinder sections forming the axis of rotation sections 11, 21 of the respective luminaire body 10, 20 and a section of the respective other luminaire body 20, 10 opposite this end face. In the present case, for example, the first luminaire body (luminaire head) 10 and the second luminaire body (luminaire center body) 20 preferably contact one another in sliding contact in the axial direction in the connecting area V.

In a comparable manner, if present, the further holding means 80 can connect the third lamp body 30 and the second lamp body 20 in such a way as to maintain the non-positive connection between them regardless of a rotational position of the lamp bodies 20, 30 to one another. This is achieved via a connecting area W, which, according to the illustrated embodiments, is provided by an end face of one of the (cylinder) sections forming the axis of rotation sections 31, 22 of the respective luminaire body 30, 20 and a section of the respective other luminaire body 20, 30 opposite this end face of the bottom part 24 is formed. In the present case, for example, the third lamp body (lamp head) 30 and the second lamp body (lamp center body) 20 touch each other in the axial direction in the connecting area W.

According to the present exemplary embodiments, the holding means 70 is formed by a screw 71 which runs coaxially with respect to the rotational axis sections 11, 21. The screw 71 is screwed with a threaded section 72 into one of the lamp bodies connected by the holding means 70 (here the second lamp body 20) and is preferably glued therein so that the screw 71 cannot unintentionally loosen. A screw head 73, which is preferably opposite the threaded section 72, is then axially supported on the respective other lamp body (here the first lamp body 10) and thus exerts a clamping force here on the two lamp bodies 10, 20, so that the frictional connection thus generated continues to basically have a relative rotation of the two lamp bodies 10, 20 allows. In order to variably provide a corresponding clamping force, between the holding means 70, preferably here the screw head 73, and the lamp body supported thereon (here the first lamp body 10) a spring element F1, for example a plate spring, which acts axially on the connection area V when the lamp bodies 10, 20 are connected by the holding means 70. An axial force can thus be exerted on the connection of the lamp bodies 10, 20 via the spring element F1, which results in a friction torque corresponding to the level of the spring force of the spring element F1 on the contacting surfaces of the connection area V. This frictional torque counteracts a rotational movement of the lamp bodies 10, 20 connected in this way and thus serves for a particularly effective stabilization of the relative rotational position of the lamp bodies 10, 20 connected in this way.

As already mentioned and shown in the exemplary embodiments, the lamp center body (here the second lamp body) 20 can be designed in two parts and have the base body 23 and the base part 24. The base body 23 has a cavity H2 (recess, depression) formed or limited by the fourth axis of rotation section 22, into which - here via an opening 27 - the third luminaire body (here the lamp base) 30 with its third axis of rotation section 31 is correspondingly inserted . The sealing means 60 is provided between these two in the further rotary section T formed in this way. In order to hold the third luminaire body 30 securely and rotatably in the second luminaire body 20, after the rotation axis section has been inserted, the base part 24 is placed on the bottom and fixed by means of screws 26. The bottom part 24 preferably has the holding means 80, which are formed integrally therewith, which partially protrude as a ring-like projection from the outside in front of the opening 27 in order to limit the axial displaceability or a falling out of the third lamp body 30, while at the same time a rotation around the further axis of rotation B is maintained.

Between the second lamp body 20 and the third lamp body 30, a spring element F2A, F2B can also be provided, which is arranged here in the cavity H2 and extends in the axial direction with respect to the further axis of rotation B at opposite ends on the one hand on the second lamp body 20 (in Fig. 3 and 4th above) and on the other hand on the third lamp body 30 (in Fig. 3 and 4th below) in order to bias the two lamp bodies 20, 30 connected in this way to rest in the connecting area W. The spring element F2A, F2B can be a spiral spring (as in Fig. 3 ), a disc spring (as in Fig. 4 ) or any other spring, spring-like or elastic element.

The holding means 70 or the further holding means 80 can furthermore have corresponding (further) locking means Z in order to establish the above-described (releasable) form-fitting connection between the correspondingly connected lamp bodies 10, 20; 20, 30 to provide. This is in accordance with the illustrated embodiment Figure 3 realized for example in the connection between the second and third lamp body 20, 30 with corresponding further locking means Z, but can also or alternatively be realized in the connection between the first and second lamp body 10, 20. The corresponding locking means Z can then preferably be designed to fix the connected lamp bodies (here the second and third lamp bodies 20, 30) in at least one or a defined number of rotational positions around the assigned axis of rotation (here the further axis of rotation B). The locking means Z can, as shown, have a form-fitting tooth pairing which forms the further connection area W.

As already mentioned, the holding means 70 or the further holding means 80 can have biasing means, preferably the spring elements F1, F2A, F2B described above, in order to hold the connected lamp bodies 10, 20; 20, 30 to be prestressed by means of spring force towards the non-positive and preferably further positive connection. The connected lamp body 10, 20; 20 30 can preferably be provided axially movable against the spring force in order to optionally release the non-positive and, if present, preferably also the positive connection in order to connect the connected lamp bodies 10, 20; 20, 30 to move into a different rotational position.

To change the rotational position about the axis of rotation A, a corresponding force can be exerted on the lamp head 10, which generates a torque about the axis of rotation A. If this torque exceeds the frictional torque generated by the seal 50 or (further) the holding means 70 or its spring element F1, a relative movement about the axis of rotation A takes place, whereby in the exemplary embodiments the first lamp body (here the lamp head) 10 then with respect to the second Lamp body (here the lamp center body) 20 is rotated or pivoted about the screw 71. The seals 50 slide along the rotational axis sections 11, 21 without their degree of compression changing significantly. Once the desired rotational position has been reached, the exertion of force on the lamp head 10 is ended. The frictional torque generated by the seal 50 or the spring element F1 then has a holding effect, as a result of which the desired rotational position is maintained. By choosing a suitable seal 50 or a suitable spring element F1 or changing the tightening torque of the screw 71, the level of the friction torque and thus the level of the holding force can vary Requirements such as ease of movement or resistance to external loads can be varied.

In the embodiment according to Fig. 3 the rotary position of the second lamp body (here the central lamp body) 20 relative to the third lamp body (here the lamp base) 30 about the further axis of rotation B can be changed as follows. First, the form fit of the pair of teeth Z is released. For this purpose, the lamp center body 20 is displaced axially relative to the further axis of rotation B against the spring force of the spring element F2A relative to the lamp base 30 until the toothing is released. Thereupon the lamp center body 20 can be rotated relative to the lamp base 30 about the further axis of rotation B (rotated here). The resetting force of the spring element F2A causes the pair of teeth Z to engage, that is to say, the pair of teeth Z is engaged. The use of a spiral spring as the spring element F2A in conjunction with a locking means Z (for example tooth pairing or some other positive-locking element) is particularly advantageous, since a spiral spring allows particularly long spring travel.

It is also conceivable that, as in the exemplary embodiment of Fig. 4 shown, by another embodiment of the further holding means 80, the rotational position of the second lamp body 20 relative to the third lamp body 30 is held only by means of frictional force, and thus without locking means (such as the tooth pairing Z). The spring element F2B generates a force in the longitudinal direction of the two lamp bodies 20, 30, that is to say a force in the axial direction. By way of example, this spring element F2B can be designed as a plate spring which, viewed over the comparatively short spring travel, has a particularly progressive increase in the spring force. The adjustment of the rotational position of the two connected lamp bodies 20, 30 with respect to one another thus takes place without a form fit and therefore without latching. The rotational position can be changed, similar to the first exemplary embodiment, by axially displacing the lamp bodies 20, 30 relative to one another, in that the frictional engagement between the two lamp bodies 20, 30 is canceled and they can be rotated in this position relative to one another. In a rest position of the lamp bodies 20, 30, the spring element F2B has such a high spring force holding the lamp bodies 20, 30 in frictional engagement that unintentional rotation is reliably counteracted. Changing the rotational position therefore requires a relative movement of the lamp bodies 20, 30 relative to one another that is smaller in terms of stroke compared to the first exemplary embodiment. The luminaire 100 can thus be made more compact overall, in particular with Use of a disc spring. Furthermore, the structure can be simplified. Depending on the requirements placed on the luminaire 100, however, a plate spring can also be combined with a locking means (such as the tooth pairing) Z if, for example, particularly high holding forces are to be achieved in a rest position.

Furthermore, in the exemplary embodiment according to Fig. 4 an alternative sleeve construction is shown, the sleeve 13 being flush with the base body 14 on one side. Such a variant is conceivable regardless of the configuration of the further holding means 80. This variant simplifies the manufacture of the lamp and improves the appearance of the lamp 100.
It is advantageous to limit the achievable angle of rotation range of the lamp bodies 10, 20, 30 in order to prevent damage to correspondingly sensitive components. For example, the cable K or a light guide that runs in the cavities H1, H2, H3 could be impaired by excessive bending or twisting. For this purpose, the luminaire 100 can also have a rotation limiting device G, by means of which a rotational angle range of the axis of rotation A or of the further axis of rotation B can be limited. In the exemplary embodiments shown, the rotation limiting device G is implemented between the third lamp body (here the lamp base) 30 and the second lamp body (here the central lamp body) 20 in such a way that a nose 32 is laterally, i.e. radially with respect to the further axis of rotation B, from the third lamp body 30 protrudes outward, which comes into contact with a stop 25 (here a radial inwardly protruding projection of the base part 24 with respect to the further axis of rotation B) in the event of a rotary movement about the further axis of rotation B). The achievable angle of rotation range is therefore dependent on the width of the stop 25 and the nose 32 and can be varied accordingly depending on the requirements placed on the lamp 100. The angle of rotation range can therefore be set essentially as desired. In a comparable manner, the first and second lamp bodies 10, 20 can also be equipped with a rotation limiter about their axis of rotation A. According to the exemplary embodiments, this is generated in that the lamp bodies 10, 20 come into contact with one another even at a corresponding angle of rotation.

The rotational positions or relative rotational angle positions of the respective connected lamp bodies 10, 20; 20, 30 can thus be adjusted to one another in a simple manner without tools, without the tightness of the lamp 100 being impaired by a change in the rotational position. This is due in particular to the fact that the sealing means 50, 60 are acted upon radially and thus independent of a connection between the lamp bodies 10, 20, 30 are. In addition, if necessary and with a corresponding design of the holding means 70, 80, the fixing of the lamp bodies 10, 20, 30 relative to one another about the respective axis of rotation A, B can be largely decoupled from the seal.

It is preferred to produce the lamp bodies 10, 20, 30 from solid aluminum material. This can, for example, be powder coated to adapt the optical properties. But it is also conceivable to manufacture the lamp bodies 10, 20, 30 from steel or other suitable materials. It is also conceivable to use generative manufacturing processes, particularly in the context of individual manufacturing.

The present invention is not limited by the exemplary embodiments described above, provided that it is covered by the subject matter of the following claims.

For example, in addition to an essentially unlimited number of lamp bodies 10, 20, 30, any number of lighting means L can also be provided. These can include LEDs or generate light output by means of light guides or the like. The shape of the lamp bodies 10, 20, 30 can essentially be determined as desired and is not restricted to an essentially cylindrical shape. The spatial position of the axes of rotation A, B and the position of the axes of rotation A, B with respect to one another is essentially arbitrary and can be dependent on the intended lighting purpose. In the exemplary embodiments, for example, the lamp center body 20 and lamp base 30 could also be used by means of a, based on Fig. 3 and Fig. 4 , horizontally arranged axis of rotation B be connected. As an alternative to the casting material for sealing the illuminant to the outside, the cover 12 can also simply serve, which closes the lamp head 10 in a sealed manner towards the top.

Claims (15)

Light (100), preferably a spot light, having: - A first lamp body (10) with a first axis of rotation section (11), and - A second lamp body (20) with a second axis of rotation section (21), wherein the first axis of rotation section (11) and the second axis of rotation section (21) are rotatably connected to one another about an axis of rotation (A), and wherein the first rotation axis section (11) and the second rotation axis section (21) axially overlap with respect to the rotation axis (A) in a rotation section (S), - a sealant (50),
wherein the sealing means (50) in the rotary section (S) is arranged radially between and in sealing contact with the first rotary axis section (11) and the second rotary axis section (21), - a holding means (70),
wherein the holding means (70) connects the first lamp body (10) and the second lamp body (20) rotatably in such a way that the sealing contact is maintained regardless of a rotational position of the lamp body (10, 20) to one another. Light (100) according to claim 1,
furthermore having a third lamp body (30) with a third axis of rotation section (31), wherein the second lamp body (20) furthermore has a fourth axis of rotation section (22), wherein the third axis of rotation section (31) and the fourth axis of rotation section (22) are rotatably connected to one another about a further axis of rotation (B), and wherein the third rotation axis section (31) and the fourth rotation axis section (22) axially overlap with respect to the rotation axis (A) in a further rotation section (T), wherein the luminaire (100) further comprises: - another sealant (60),
wherein the further sealing means (60) is arranged in the further rotary section (T) radially between and in sealing contact with the third rotary axis section (31) and the fourth rotary axis section (22), and - another holding means (80),
wherein the further holding means (80) connects the third lamp body (30) and the second lamp body (20) rotatably in such a way that the sealing contact is maintained regardless of a rotational position of the lamp bodies (20, 30) with respect to one another. Light (100) according to claim 1 or 2,
wherein the first lamp body (10) and the second lamp body (20), and if available preferably also the second lamp body (20) and the third lamp body (30), are at least positively and preferably also releasably connected to one another. Light (100) according to claim 3,
wherein the holding means (70) connects the first lamp body (10) and the second lamp body (20) in such a way as to maintain the frictional connection between them regardless of a rotational position of the lamp bodies (10, 20) to one another, and
preferably, if present, the further holding means (80) connects the third lamp body (30) and the second lamp body (20) in such a way as to maintain the non-positive connection between them regardless of a rotational position of the lamp bodies (20, 30) to one another. Light (100) according to claim 3 or 4, wherein the holding means (70) furthermore has corresponding locking means in order to provide the form-fitting connection between the first lamp body (10) and the second lamp body (20), preferably, if present, the further holding means (80) furthermore having corresponding further locking means (Z) in order to provide the positive connection between the third lamp body (30) and the second lamp body (20). Light (100) according to claim 5,
wherein the locking means or the further locking means (Z) is designed to fix the connected lamp bodies (10, 20; 20, 30) in at least one or a defined number of rotational positions around the assigned axis of rotation (A, B), wherein the locking means or the further locking means (Z) has a pair of teeth (Z). Light (100) according to one of the preceding claims,
wherein the holding means (70) or the further holding means (80) biasing means, preferably a spring element (F1, F2A, F2B), to the connected lamp body (10, 20; 20, 30) by means of spring force to the frictional and preferably further pretensioning positive connection. Light (100) according to claim 7,
wherein the connected lamp bodies (10, 20; 20, 30) are provided axially movable against the spring force in order to release the non-positive and, if present, preferably also the positive connection, in order to put the lamp bodies (10, 20; 20, 30) in to move to another rotational position. Light (100) according to one of the preceding claims,
wherein the first lamp body (10) and the second lamp body (20) and, if present, preferably also the third lamp body (30) each delimit an inner cavity (H1, H2, H3). Light (100) according to claim 9, wherein the cavities (H1, H2, H3) of adjacent lamp bodies (10, 20; 20, 30) are connected to one another, wherein preferably the sealing means (50) and, if present, the further sealing means (60) seal the cavities (H1, H2, H3) connected in this way to the outside with respect to the respective rotary sections (S, T). Light (100) according to claim 9 or 10,
whereby in the cavities (H1, H2, H3) electrics and / or electronics (K) are provided, preferably at least one cable or cable harness (K) for the electrical supply of the lamp (100), which particularly preferably passes through all cavities (H1, H2 , H3). Light (100) according to one of the preceding claims,
additionally comprehensive: - A rotation limiting device (G), by means of which an angle of rotation range of the axis of rotation (A) or the further axis of rotation (B) is limited. Light (100) according to one of the preceding claims, wherein one of the lamp bodies (10, 20, 30), preferably the first lamp body (10), has or forms a lamp head (10) for emitting light from the lamp (100), and / or wherein one of the lamp bodies (10, 20, 30), preferably the second lamp body (20) or, if present, the third lamp body (30), has or forms a lamp base for fastening the lamp (100). Light (100) according to one of the preceding claims, wherein the lamp bodies (10, 20, 30) are arranged in series one behind the other, wherein preferably the lamp body (10) at one end of the row forms the lamp head (10) and the lamp body (30) provided with respect to the lamp head (10) at the opposite end of the row forms the lamp base (30), preferably the one between the The lamp head (10) and the lamp base (30) preferably have or form the lamp body (20) provided in the lamp center body (20). Light (100) according to one of the preceding claims,
further comprising a lighting means (L), preferably an LED lighting means (L), which is provided in the first lamp body (10), preferably in the lamp head (10), and is preferably encapsulated in this.

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