LIGHTING DEVICE WITH RELEASABLY CONNECTED SHADE

Abstract

The invention provides a lighting device (1) comprising a housing (2) including a solar-power unit and a lighting element, and a shade (3) connected to the housing (2), wherein the shade (3) is releasably connected to the housing (2) and loosely rests on an external surface of the housing (2) when connected thereto.

Claims

1. A lighting device comprising: a housing including a solar-power unit and a lighting element; and a shade connected to the housing; wherein the shade is releasably connected to the housing and loosely rests on an external surface of the housing when connected thereto.

2. The lighting device according to claim 1, wherein the shade rests loosely on a rim projecting from a side of the housing.

3. The lighting device according to claim 2, wherein the side of the housing tapers, in particular tapers conically, in a direction away from the rim.

4. The lighting device according to claim 1, wherein the shade rests loosely on a tapering side surface, in particular, a conical side surface, of the housing.

5. The lighting device according to claim 2, wherein the extension of the housing on a side of the rim facing the interior of the shade is larger than the extension on a side facing away from the interior of the shade.

6. The lighting device according to any one of the preceding claim 1, wherein the shade loosely rests on the external surface of the housing via a mounting element of the shade.

7. The lighting device according to claim 6, wherein said mounting element of the shade is a ring, in particular, a ring also serving as a support element supporting a fabric of the shade, in particular, the ring being a top support element of the shade.

8. The lighting device according to claim 6, wherein said mounting element of the shade is distinct and spaced from a support structure of the fabric of the shade, in particular, wherein the mounting element is connected to the support structure via one or more struts.

9. The lighting device according to claim 1, further comprising a suspension assembly for suspending the lighting device from a surface, wherein the suspension assembly is connected to the housing.

10. The lighting device according to claim 9, wherein the suspension assembly comprises a hook connected to the housing via at least one, in particular, via at least two or at least three, cords.

11. The lighting device according to claim 10, comprising two or more cords, in particular, three or more cords, wherein the two or more cords are connected to the housing in a surface area surrounding at least one solar cell of the solar-power unit.

12. The lighting device according to claim 9, wherein the suspension assembly comprises at least one directing structure adapted for directing a potentially dislocated shade towards the external surface of the housing, in particular, said directing structure comprising at least one cord of the suspension assembly, in particular, the at least one cord being arranged adjacent to the external surface.

13. The lighting device according to claim 1, wherein the shade has a top opening and a bottom opening wherein the housing is arranged at least partly within the top opening and wherein the size of the bottom opening is larger than the size of the top opening.

14. The lighting device according to claim 13, wherein the size of the bottom opening is larger than the size of the housing.

15. The lighting device according to claim 1, wherein the shade is a collapsible shade.

Description

[0043] Advantageous embodiments will now be described in combination with the enclosed figures.

[0044] FIGS. 1A and 1B show a perspective view and a cross-section, respectively, of a lighting device according to an embodiment of the invention;

[0045] FIGS. 1C and 1D show a housing of the lighting device in isolation, and a shade of the lighting device in collapsed state;

[0046] FIG. 1E shows the insertion of the housing into the shade, from below;

[0047] FIG. 2 shows a cross section of an exemplary housing of a lighting device according to an embodiment of the invention;

[0048] FIG. 3 shows a cross section of an exemplary housing of a lighting device according to an alternative embodiment of the invention;

[0049] FIG. 4 shows a cross section of an exemplary housing of a lighting device according to a further embodiment of the invention;

[0050] FIG. 5 shows a cross section of an exemplary housing of a lighting device according to yet another embodiment of the invention;

[0051] FIG. 6 show a perspective view of the exemplary housing illustrated in FIG. 4;

[0052] FIG. 7 shows a perspective view of an exemplary shade usable for a lighting device according to an embodiment of the invention; and

[0053] FIG. 8 shows a perspective view of a lighting device according to another embodiment of the invention.

[0054] FIG. 1A shows a perspective view of an exemplary lighting device 1 according to an embodiment of the invention in an assembled state, i.e. ready to be suspended from a ceiling or similar structure. FIG. 1A, thus, shows the lighting device 1 in its configuration when in use. The lighting device 1 comprises a housing 2 of which only the top surface is visible in FIG. 1A. At the top surface, solar cells of a solar-power unit received by the housing are arranged. The housing 2 further includes a lighting element that is not visible from FIG. 1A since it is arranged inside the shade 3. Connected to the housing 2 are three cords 4 being part of a suspension assembly 4 for suspending the lighting device 1, e.g., from a ceiling. The cords 4 are connected with a hook 5. Instead of the hook, a different hanging device may be provided as well, for instance, a hanging loop.

[0055] The shade 3 comprises a supporting structure including a plurality of ring-shaped support members 6. In the embodiment of FIG. 1A, a number of individual and circular ring shaped support members 6 are shown. As alternative a spiral shaped supporting structure may be used for the shade. Furthermore, the support members need not be circular but could have other shapes, such as square, rectangular, oval, triangular etc. depending on the desired shape of the shade. In case the support members have another shape than circular then preferably the design of the housing is adapted accordingly. Mounted to said ring-shaped support members 6 is the actual shade fabric, which may be made of silk, linen, cotton, plastic, paper, or the like. The shade fabric is flexible. Thus, the shade 3 is collapsible from the spherical shape shown in FIG. 1A to a disc-like shape. This disc-like shape is illustrated in FIG. 1D in which the shade 3 is shown in its collapsed, i.e. flat, state.

[0056] The shade fabric is at least partly transparent and may be colored and/or textured. Although FIG. 1A shows a spherical shape of the shade 3, other shapes are conceivable as well, such as, for instance, the shape of a box or of a hexagon.

[0057] FIG. 1B shows a cross section of the exemplary lighting device 1 of FIG. 1A. In this cross section, for instance, the part of the housing 2 lying in the interior of the shade 3 is visible. Particularly, a lighting element 7 projecting from a bottom surface of the housing 2 is visible. Alternatively, a transparent surface area may be provided at the lower side of the housing 2 so that light from the lighting element arranged within the housing may be output via said transparent surface section. Also a combination of these alternatives is possible, i.e. the projecting lighting element 7 may be enclosed by a transparent surface section of the housing 2, projecting from the otherwise planar lower side of the housing.

[0058] As visible from FIG. 1B, the housing 2 is arranged within a top opening 6 of the shade 3. The shade 3 itself only rests loosely, via one of the support elements on an external surface of the housing 2. In the illustrated embodiment, the support element is a top support element 6. The top support element 6, thus, forms a mounting element. It is also possible, however, that the mounting element is distinct from the support elements, as illustrated in FIG. 7.

[0059] Since the shade 3 only rests loosely on an external surface of the housing 2, the shade 3 can be lifted and, thereby detached from the housing 2. In this way, it is easily possible to replace the shade 3 by another shade, which may be, for instance, differently colored, differently shaped, differently sized, etc.

[0060] The shade 3 comprises a bottom opening 6, the size of which is larger than the size of the top opening 6. Particularly, the bottom opening 6 may have a diameter that is larger than the diameter of the top opening 6. Still more preferably, the bottom opening 6 has a size, e.g. a diameter, that is larger than the size, e.g. the diameter, of the housing 2. Thereby, the housing 2 may, as indicated by arrow AR in FIG. 1E, easily be introduced into the shade 3 via the bottom opening 6. In this way, it is possible to easily introduce the housing 2 via the bottom opening 6 into the shade 3 until the top support element 6 surrounding the top opening 6 loosely rests on an external surface of the housing 2. Thereby, the shade 3 can be suspended from a roof or similar, as the shade 3 rests loosely on the housing 2 being provided with the suspension assembly 4.

[0061] As can be seen from FIG. 10 the cords 4 of the suspension assembly 4 are attached to the housing 2 as well. To remove the shade 3, the shade 3 has to be lifted beyond the hook 5. Thus, even if the shade 3 only loosely rests on an external surface, having in FIG. 10 the form of a rim 9, of the housing 2, the shade 3 would not easily be completely removed from the housing 2 by accident, for instance, under the influence of wind. Preferably, the cords 4 are connected to the housing 2 adjacent to the external surface, i.e. the rim 9 in this embodiment, as shown in FIG. 10. Thereby, if the shade 3 is dislocated relative to the external surface, e.g. the rim 9, by action of wind, the cords 4, in particular their lower portions, will serve as directing structures 4 acting to return such temporarily dislocated shade 3 to its correct place, loosely resting on the external surface, e.g. the rim 9.

[0062] In addition to solar cells 11 and lighting element 7 (the latter is best shown in FIG. 1B) the housing 2 may additionally contain a rechargeable battery for storing solar power, an on/off button, a light sensor etc.

[0063] In the following, different embodiments of the housing 2 will be shown.

[0064] The housing may generally be cylindrically or conically shaped, wherein, additionally, a rim may project from a side surface of the cylinder or cone. As a consequence, the outer diameter of the housing may have at least two different sizes along an axis being perpendicular to the top opening of the shade or, in other words, perpendicular to the top surface of the housing. The top opening of the shade, again, may have a size or diameter that is smaller than the largest of the at least two different outer diameters of the housing. In this way, a connection between the shade and the housing can be achieved, wherein the shade only loosely rests on an outer surface of the housing.

[0065] As mentioned above, to loosely rest on an external surface of the housing according to the invention means that the shade is not fixed to the housing by means of any separate fixing elements such as hooks, snap-in connections, or clamping connections. It is, however, possible that in view of friction between the shade and the external surface of the housing, some additional force would be required to lift the shade from the external surface of the housing.

[0066] The shade 3 may particularly be removable from the housing 2 by moving the shade in a direction perpendicular to the top opening 6 of the shade 3. In said direction, particularly, no fixing elements or protruding parts of the housing 2 may be present that could impede the removal of the shade 3.

[0067] FIG. 2 illustrates an example of the housing 2 having an external surface in the form of a side surface 8 that tapers, particularly, in a direction away from the top opening 6 of the shade 3. In other words, the diameter of the housing 2 decreases with increasing distance from the top opening 6 of the shade 3. In this way, it is possible to easily mount the shade 3 to the housing 2 while at the same time achieving a good connection in the final mounting position of the shade 3. The housing 2 of this example, thus, has a conical shape.

[0068] The shade 3 itself is only schematically shown in this and the following figures. The uppermost, i.e. the top support element 6 of the shade 3 which acts as mounting element is shown. This mounting element 6, which is a circular ring in the embodiments shown, but which may have other shapes, such as oval, square, rectangular, triangular, etc. depending on the shape of the shade and/or the shape of the housing, rests loosely on the tapered side surface 8 of the housing 2.

[0069] FIG. 3 shows an alternative embodiment of the housing 2. In this case, the housing 2 is generally cylindrical. However, an external surface in the form of a rim 9 projects from a side surface 10 of the cylindrical housing 2. The shade 3, particularly the top support element 6 acting as a mounting element may loosely rest on said rim 9.

[0070] The rim 9 may be provided along the whole circumference of the housing 2. Alternatively, the rim 9 may be interrupted and only provided in certain circumferential areas of housing 2 (not shown). In the latter case, material for the rim may be saved. In this case, also the mounting element, particularly when being distinct from a support element of the shade, may be interrupted, particularly so as to match the form of the rim. In this case, the distance between neighboring parts of the rim may be smaller than a circumferential extension of each of the parts of the mounting element to allow for a reliable connection.

[0071] FIG. 4 shows another alternative embodiment of an exemplary housing 2 of a lighting device according to the invention. In this case, an external surface in the form of a rim 9 projects from a conical side surface 8 of the housing 2. This embodiment, thus, may be seen as a combination of the embodiments shown in FIGS. 2 and 3. In this embodiment, the conical side surface 8 makes it easier for the top support element 6 of the shade 3 to find its correct position loosely resting on the rim 9 when introducing the housing 2 into the shade 3 (compare FIG. 1E).

[0072] FIG. 5 shows a further example of a housing 2 for a lighting device according to an embodiment of the invention. The housing 2 of FIG. 5 is similar to the housing 2 of FIG. 3. However, the external surface in the form of the rim 9 is provided at an upper portion of the side wall 10 of the housing 2. Thus, the extension of the housing 2 on the side of the rim 9 facing the interior of the shade 3 is larger than the extension on the side facing away from the interior the shade 3. In this case, the cords 4, that are also schematically illustrated in FIGS. 2 to 4, are particularly useful in their function serving as directing structures 4 to avoid having the shade 3 unintentionally slip from the housing 2 and/or being dislocated from the rim 9, for instance, under the influence of wind.

[0073] FIG. 6 shows a perspective view of the housing 2 of the embodiment shown in FIG. 4. At a top surface 11 of the housing 2, the housing 2 comprises an opening in which at least one solar cell 11 of the solar-power unit is arranged. The cords 4 are connected to the housing 2 in a surface area surrounding the at least one solar cell 11 of the solar-power unit. To be efficient as part of the directing structure 4, directing a potentially dislocated shade back to the external surface, the cords 4 are connected to the housing 2 adjacent to the external surface, having in this embodiment the form of the rim 9.

[0074] FIG. 7 shows a perspective view of an exemplary shade 3 usable for a lighting device according to an embodiment of the invention. For instance, the shade 3 may be used in combination with a housing 2 as illustrated in FIG. 10, 2, 3, 4, or 5. In this example, the mounting element 12, which is to rest loosely on the housing 2, is distinct from the support structure of the shade fabric. In particular, the mounting element 12 is spaced from the top support element 6 and connected thereto via three horizontal struts 13. The invention is not limited to three struts. Alternatively one, two or more than three struts may be used.

[0075] The space between the mounting element 12 and the fabric of the shade, has the following advantages. The wear on the fabric may be decreased as it is no longer in contact with the housing. Moreover, a more well-defined position of the mounting element 12 with respect to the housing is possible as there is no involvement of the fabric there. Finally, the space between the mounting element 12 and the supporting structure of the shade fabric offers a possibility for rain water to drain between the mounting element 12 and the fabric of the shade.

[0076] As indicated above, the shape of the mounting element 12 does not need to be ring-shaped. Other shapes adapted, for instance, to the shape of the top support element 6 or of the housing, are possible as well. For instance, the mounting element may be oval or rectangular in shape.

[0077] FIG. 8 illustrates another embodiment of a lighting device 1 according to the invention. The embodiment generally corresponds to the embodiment of FIG. 1A, but with a different form of the shade 3. Instead of a globe shaped shade 3 as in FIG. 1A, the shade 3 of FIG. 8 has a vertically elongated or oval shape. The mounting element may be embodied as a separate element distinct from the supporting structure of the shade, as illustrated in FIG. 7. Alternatively, the mounting element may correspond to the top support element as illustrated, for instance, in FIG. 2. The shade 3 may be used in combination with a housing as illustrated in FIG. 10, 2, 3, 4, or 5, particularly since the mounting element may still be ring-shaped as the shade is only vertically elongated. The mounting element and the housing are not shown in FIG. 8, the suspension assembly 4 is only depicted schematically.

[0078] Not illustrated in the figures, the housing 2 of the exemplary lighting device may further include a switch and/or a light sensor to activate the lighting element dependent on the position of the switch and/or the ambient lighting conditions.

[0079] The housing 2 may further receive at least one rechargeable battery (not shown) electrically connected to the at least one solar cell 11 and the lighting element. The rechargeable battery may be chargeable via the at least one solar cell 11 and then usable to power the lighting element.

[0080] Although the previously discussed embodiments and examples of the present invention have been described separately, it is to be understood that some or all of the above-described features can also be combined in different ways. The above discussed embodiments are particularly not intended as limitations, but serve as examples, illustrating features and advantages of the invention.