SE542867C2

SE542867C2 - Motorized window cover device with solar cells arranged at a wand

Info

Publication number: SE542867C2
Application number: SE1851452A
Authority: SE
Inventors: Mauricio Affonso
Original assignee: Ikea Supply Ag
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2020-07-21
Also published as: DE212019000428U1; CN216617400U; SE1851452A1; WO2020106207A1

Abstract

Motorized solar powered window covering device comprising an electrical motor (40) arranged to actuate a window cover (4) at a window (24), power storage means (36), solar cells (22), driver electronic means (42) for controlling the charging of the power storage means (36) by the solar cells (22) and controlling the motor (40) actuating the window cover (4), and a wand (14) arranged to be hanging at the at the motorized solar powered window covering device (1) by means of mechanical wand connection means (16), wherein the solar cells (22) are arranged at the wand (14) and in electrical connection with the motorized solar powered window covering device (1) by means of electrical wand connection means (20). A wand (14) for powering a motorized solar powered window covering device (1), wherein the wand (14) comprises solar cells (22), electrical wand connection means (20) allowing electricity from the solar cells (22) to be used for powering the motorized solar powered window covering device (1), and mechanical wand connection means (16) allowing the wand (14) to hang at the motorized solar powered window covering device (1).

Description

Motorized window cover device with solar cells arranged at a wand Technical fieldThe present invention relates to a motorized solar powered window covering device, and to a wand for a motorized solar powered window covering device.

Background lt is well known to use solar cells for charging batteries for many differentapplications. For window covering devices it is known use solar cells for powering motorisedblinds, which is for instance shown in US2010/0154999, where solar cells are placed onvenetian blind blades. Another example of solar cells for powering motorized blinds isshown in US2011/0036511 where solar cells are attached to the fabric of a roman blind.

One problem with prior art window covering devices powered by solar cells is thatthe electrical connection between the solar cells and the motor can be a challenge and/ornot visually attractive, e.g. if electrical threads or cords needs to be included the fabric, or ifa loose cable is needed between the solar cells and the motor. Another problem with priorart window covering devices powered by solar cells is that the solar cells may affect andlimit the visual design of the blinds or of the window.

Therefore there is a need for a convenient motorized solar powered windowcovering device which is not negatively affecting the visual design and which is easy to install and run.

Summary An object of the present invention is therefore to provide a wand for and amotorised solar powered window covering device which solves the drawbacks of the priorart. ln accordance with a first aspect, the present invention relates to a motorized solarpowered window covering device comprising an electrical motor arranged to actuate awindow cover at a window, power storage means, solar cells, driver electronic means forcontrolling the charging of the power storage means by the solar cells and controlling themotor actuating the window cover, and a wand arranged to be hanging at the at the motorized solar powered window covering device by means of mechanical wand connection means, wherein the solar cells are arranged at the wand and in electrical connection withthe motorized solar powered window covering device by means of electrical wandconnection means.

A wand is known in the field of window covering devices as a stick or rod hanging atthe side ofthe window cover and being used for controlling e.g. the position of horizontalslats in venetian blinds but turning the wand. ln some window covering devices a wand is aplaced at curtains and being used for manually pulling the curtains without having to toughthe fabric of the curtain. Therefore a wand hanging at a window covering device will beperceived as a device for controlling the position ofthe blind and thus will not be seen asnegatively affecting the visual appearance or impression of the blind. However, for thepresent invention the wand is provided with solar cells are used for charging the powerstorage means, which could be e.g. a battery or a capacitor, for powering the electricalmotor of the motorized solar powered window covering device. The wand is elongated andcan have any suitable cross sectional shape such as circular, triangular, rectangular,octagonal, etc. The wand could be flat having two major sides where one or both sides arecovered with solar cells. The solar cells are including means for converting solar energy toelectrical energy. Several types of solar cells are possible to arrange on the wand accordingto the present invention. For example, the solar cells could be a rigid solar cell based onsilicon technology such as Sunpower silicon cells in a PET and ETFE enclosure, or a thin filmsolar cell technology such as amorphous silicon or copper indium gallium selenide, as forexample the custom flex module from mia2ole.

An advantage with providing solar cells on a wand is, as explain above, that the wandwill in normal use be arranged sufficiently close to a window and therefore be exposed toenough light to power the light motorized solar powered window covering device.I\/|oreover, since the wand is hung at the motorized solar powered window covering deviceit requires no or very little installation efforts. ln addition, and since the wand is hung at themotorized solar powered window covering device by means of mechanical wand connectionmeans, it may be possible to use the wand for mechanically regulating the position of thewindow cover provided that a suitable mechanism for mechanically regulating the windowcover included and connected to the mechanical wand connection means. Such mechanismcould be a mechanism for tilting the slats of a venetian blinds, or for starting and stopping the motor by pulling the wand, or winding and unwinding fabric in a roller blind, etc.

Window cover could be e.g. a roller blind, honeycomb blind, venetian blind, roman blind,curtain, or panels etc. Thus, actuate the window cover could be moving the roller blindfabric on a tube, or the moving honeycomb blind or venetian blinds up and down or movingthe position of horizontal slats of blinds, or for curtain an panel options actuate could be tomove in a horizontal direction. Preferably the solar cells are integrated in the wand. Thesolar cells could be integrated inside the wand or being integrated in the wand on theexternal side of the wand, or a combination.ln one embodiment the motorized solar powered window covering device whereinthe wand has a handle portion for a user to pull and/or turn the wand to control theposition or motion ofthe window cover. The handle portion can be the lower portion of thewand. The handle portion can be shaped to direct the user to grab the handle portion e.g.by being comprised of a material with some friction/tactile means. Alternatively the handleportion can be the entire wand thereby the used may grab the wand at any suitable positionof the wand. ln one preferred embodiment the mechanical wand connection means and theelectrical wand connection means are arranged at the upper end portion of the wand, whenthe wand is arranged hanging at the at the motorized solar powered window coveringdevice, and the handle portion is arranged at the lower end portion of the wand.ln one embodiment the motorized solar powered window covering device, whereinthe wand comprises a tube having at least one transparent portion and wherein the solarcells are arranged inside the tube at the transparent portion. The tube can provide properprotection for the solar cells. The tube could be transparent at one or several portions of thetube or the entire tube can be transparent. Portions that are not transparent may becovered by another surface material, such as a veneer or other material for a designpurpose.ln one embodiment the motorized solar powered window covering device, whereinthe solar cells comprises a solar cell film arranged inside the transparent tube. A solar cellfilm arrange inside a tube may be a cheap way or realizing the invention. The film can beflexible and inserted into the tube.ln one embodiment the motorized solar powered window covering device, wherein the electrical wand connection means and the mechanical wand connection means arearranged in a common connection structure. Thereby it may be easier for users since less assembly is need and in addition it may give may a nice look. ln one embodiment the motorized solar powered window covering device, whereinthe wand is elongated and having a total length of least 30 cm, preferably at least 40 cm. Acertain length may also be required in order to ensure large enough surface area to becovered by solar cells. I\/|oreover, for some embodiments, e.g. where the wand is pulled ofturned to affect the position of the window cover, the wand may be easily reachable for theuser which might require a certain length. The wand may have a width of between 0.3 cm -5 cm, preferably between 1 cm - 3 cm. Since the wand is an elongated stick the width isreferring to the diameter of the wand if the wand is a rod with a circular cross section, orthe corresponding cross sectional measure for a wand having another shape than a rod withcircular circumference. ln one embodiment the motorized solar powered window covering device, whereinthe mechanical wand connection means and the electrical wand connection means aredetachable from the window covering device allowing the wand to be detachable from thewindow covering device. A detachable wand could be used and/or sold as a separate article. ln one embodiment the motorized solar powered window covering device compriseswireless control means for controlling the motion of the window cover wirelessly. Thewand, or any other suitable portion of the motorized solar powered window coveringdevice, can include wireless control means such that the blind can be operated wirelessly.For instance zigbee or any other suitable protocol can be used for controlling the motorizedsolar powered window covering device. The wand may then be used for the sole purpose ofcharging the power source of the motorized solar powered window covering device, or itmay in addition be used for controlling the motion of the window cover.

The motorized solar powered window covering device may comprises solar celldriver electronics driver electronics for controlling transport of electricity from the solarcells to the power storage means. ln accordance with a second aspect, the present invention relates to wand forpowering a motorized solar powered window covering device, wherein the wand comprisessolar cells, electrical wand connection means allowing electricity from the solar cells to beused for powering the motorized solar powered window covering device, and mechanicalwand connection means allowing the wand to hang at the motorized solar powered window covering device.

Brief description of the drawings ln the following description reference will be made to the appended drawings, inwhich: Fig. 1 shows one embodiment ofthe motorized solar powered window coveringdevice according to the present invention; Figs 2a-d show the motorized solar powered window covering device of Fig. 1 whena user is activating the device; Fig. 3a schematically shows electrical components of one embodiment of themotorized solar powered window covering device according to the invention, Fig. 4 shows an alternative embodiment of a wand for a motorized solar poweredwindow covering device according to the present invention; Fig. 5 shows an alternative embodiment of a wand for a motorized solar poweredwindow covering device according to the present invention; Fig. 6 shows an alternative embodiment of a wand for a motorized solar poweredwindow covering device according to the present invention; Fig. 7a shows an alternative embodiment of a wand for a motorized solar poweredwindow covering device according to the present invention; Fig. 7b shows an alternative embodiment of a wand for a motorized solar poweredwindow covering device according to the present invention; Fig. 8 shows an alternative embodiment of a motorized solar powered windowcovering device according to the present invention; Fig. 9 shows an alternative embodiment of a motorized solar powered windowcovering device according to the present invention; Figs 10a-b show an alternative embodiment of a motorized solar powered windowcovering device according to the present invention when a user is activating the device; Fig. 11 shows an alternative embodiment of a motorized solar powered windowcovering device according to the present invention; and Fig. 12 shows an alternative embodiment of a motorized solar powered window covering device according to the present invention.

Detailed description Fig. 1 shows a motorized solar powered window covering device 1 in the shape of aroller blind 2. The roller blind 2 has a window cover 4, i.e. a fabric, rolled up on a tube 6. Anelectrical motor, rechargeable battery powering the motor, and electrical connectionmeans, are arranged inside the tube 6, and is therefore not visible in Fig. 1. The roller blind 2is intended to be arranged at a window by means of brackets 7. One end portion 8 oftheroller blind tube 6 has a string loop 10 sticking out from a small opening 12 ofthe endportion 8 of the roller blind tube 6. The string loop 10 is in communication with on/offfunctions ofthe motor inside the roller blind tube 6. Thus by pulling the string loop 10, theelectrical motor of the roller blind is started and stopped.

A wand 14, formed as an elongated rod or stick, having at its upper end portion 15 amechanical wand connection means 16 connectable to the string loop 10 of the roller blindby means of a detachable clip 18. Thereby the wand 14 can be hung at the roller blind 2 bymeans of the mechanical wand connection means 16. The wand 14 can thus be used forcontrolling the start and stop of the roller blind motor by pulling the wand 14 therebystarting and stopping the motor.

Further, the wand 14 is connectable to the roller blind 2 by electrical wandconnection means 20, which in the embodiment illustrated in Fig. 1 is an electrical cord 23and a USB contact 21. The end portion 8 ofthe roller blind tube 6 has an electrical contactadapted to be connected to the electrical wand connection means 20, i.e. in the illustratedembodiment in Fig. 1 the end portion 8 of the roller blind 2 has a USB port 25. The lowerpart of Fig. 1 is illustrating, using arrows, that the wand 14 is connectable to the roller blind2 by means of an electrical connection, arrow A, and mechanical connection, arrow B. Theupper part of Fig. 1 shows the wand 14 connected to the roller blind 2.

One side of the wand shown in Fig. 1 is covered with solar cells 22. The embodimentin Fig. 1 has solar cells 22 arranged on one side of the wand 14, and thus the wand 14 maypreferably be placed so that the side ofthe wand 14 having solar cells 22 is facing a window.However, solar cells available on the market today may also effectively charge energy fromindoor light without having to face direct sunlight, so any orientation ofthe wand 14 maywork. As will be shown in other embodiments below solar cells may also be arranged on all sides of the wand 14. Anyhow, the solar cells arranged on the want 14 will be used for charging energy from light and use of for charging the battery of the motorized solarpowered window covering device 1, i.e. in this example the motorized blind 2.

The connection between the wand 14 and the roller blind 2 is shown in a close upview in the lower part of Fig. 1. The mechanical wand connection means 16 is in thisembodiment a hook 18 and a plastic fixed loop at the upper end portion 15 of the wand 14.lt is also realized that since both the mechanical and the electrical wand connection means16, 20 are attachable and de-attachable, the wand 14 can be provided as an add-on to anexisting motorized window covering device provided that it is suited for that, e.g. having aUSB connection, however it can also be provided together with a motorized windowcovering device 1.

Figs 2a-d show the motorized solar powered window covering device 1 of Fig. 1 inoperation and arranged at a window (not shown). Fig. 2a shows a hand of a user pulling thewand 14 downwards, illustrated by an arrow C in Fig. 2a, to start the electric motor and thewindow cover 4, i.e. fabric, is thus moved downwards, which is illustrated with an arrow Din Fig. 2b. The movement of the window cover 4 downwards can be automatically stoppedwhen it has reached a predefined, pre- programmed, length or using sensors etc. which isnot shown here. Alternatively the user can pull the wand 14 once more to stop the motor.When the wand 14 is pulled again, which is illustrated with an arrow E in Fig. 2c, the motoris started, but the direction of movement is reversed compared to the movement describedin connection to Fig. 2a, which means that the window cover 4 is moving upwards, reversingthe movement shown in Fig. 2b, which is illustrated by an arrow F in Fig. 2d. Fig. 2d showsthe window cover 4 almost fully rolled up on the roller blind tube 6. The movement ispreferably stopped automatically, using suitable sensors not shown here, when the windowcover 4 is fully rolled up on the tube 8. Alternatively a user can once more pull the wand 14downwards to stop the motor. The details of the wand 14, such as solar cells, connectionmeans etc. are not shown in Figs 2a-d however the wand 14 in Figs 2a-d is the same as thewand described in connection with Fig. 1 above.

Fig. 3 shows schematically the electrical components of one embodiment of themotorized solar powered window covering device 1, such as the one described inconnection to Fig. 1 above. A power storage 36, here a rechargeable battery 44, an electricalmotor 40, and driver electronic means 42 to control the motor 40, and control the charging of the battery 44. The driver electronic means 42 also includes electrical connection means connecting the battery 44 to the motor 40. The motor 40, the battery 44, and the driverelectronic means 42 are arranged inside a headrail 46 of the roller blind 2. Electricalconnection between the driver electronic means 42 and the wand 14 is handled by a USBconnection 48 and electric cables 50, 52 inside the head rail 46 and at the wand 14. Solarcell driver electronics 38 for controlling transport of electricity from the solar cells 22 to thebattery 44 are arranged at the wand 14. The solar cell driver electronics 38 can be used forstabilizing the energy flow from the solar cells, including e.g. USB chip driver. Alternativelythe solar cell driver electronics can be integrated in the head rail, either as a separate unit oras a part of the driver electronic means 42. ln addition, in an alternative embodiment, notshown, the battery 44 may be replaced by a capacitor. lt may also be possible to have thebattery or capacitor integrated in the wand 14.

Fig. 4 shows one alternative embodiment of the wand 14 in Fig. 1. The lower part ofFig. 4 shows the wand 14 in a side view taken along the wand 14 and the middle part of Fig.4 shows the wand 14 in a perspective view. The two bigger circles in Fig. 14 illustrate thatthe upper end portion 15 ofthe wand 14 is zoomed in. The alternative embodiment of thewand 14 shown in Fig. 4 can be used together with the motorized solar powered windowcovering device 1 described in Fig. 1 above. One difference between the wand 14 shown inFig. 4 and the wand 14 shown in Fig. 1 is that the solar cells 22 shown at the wand 14 in Fig.4 is arranged on both sides of the wand 14. The wand 14 has two flat surfaces, where thesolar cells 22 are arranged. ln addition the wand 14 shown in Fig. 4 has a handle portion 54where no solar cells are arranged. The upper end portion 15 ofthe wand 14 has the sameconnection means, i.e. the mechanical connection means 16 and the electrical connectionmeans 20, as the wand described in connection to Fig. 1 above.

Figs 5-6, and Figs 7a-b show other alternative embodiments of the wand 14 in Fig. 1in perspective views, and in addition with the end portion 15 ofthe wand 14 zoomed in. Thealternative embodiments ofthe wand 14 shown in Figs 5-7 can be used together with themotorized solar powered window covering device 1 described in Fig. 1 above. The upperend portion 15 of the wand 14 has the same connection means, i.e. the mechanicalconnection means 16 and the electrical connection means 20, as the wand described inconnection to Fig. 1 above. ln Fig. 5 the solar cells 22 are attached at a circular wand 14. ln Fig. 6 the solar cells 22 are attached at a hexagonal wand 14. The solar cells 22 could either be attached on the external side of the wand 14 or they could be arranged inside the wand 14, e.g. a solar cellfilm 72, which is shown in Fig. 7B, could be arranged inside the wand 14 ifthe wand 14 forinstance is made by an acrylic transparent tube 70. ln Fig. 7A the solar cells 22 are arrangedon a strip inserted inside a transparent tube 70. ln Figs 7a-b, where the upper end portion15 of the wand 14 is disassembled, it is seen that the cable of the electrical wand connectionmeans 20 goes though the upper end portion 15 of the wand 14 and is attached to the solarcells 22.

Fig. 8 shows a motorized solar powered window covering device 1 according to analternative embodiment. The motorized solar powered window covering device 1 shown inFig. 8 is a roller blind 2 similar to the one described in connection to Fig. 1 above, and havinga wand 14 provided with solar cells 22. The difference between the roller blinds 2 shown inFig. 8 and Fig. 1 is that the wand 14 shown in Fig. 8 has the mechanical connection means 16and the electrical connection means 20 integrated in a common structure 74 fixedlyattached to the end portion 8 ofthe roller blind tube 6. The common structure 74 shown inFig. 8 is a flexible cord. As can be hinted in the zoomed in circle in Fig. 8, the end portion 8still is equipped with an electrical input port, such as a USB port 25. USB port 25 allows therechargeable battery inside the roller blind tube 6 to be charged using a regular chargingcable which may be used as a backup charging for cases with very poor light and/or thebattery need to be charged fast.

Fig. 9 shows a motorized solar powered window covering device 1 according to analternative embodiment. The motorized solar powered window covering device 1 shown inFig. 9 is a roller blind 2 similar to the one described in connection to Fig. 8 above having themechanical connection means 16 and the electrical connection means 20 integrated in acommon structure 74 fixedly attached to the end portion 8 of a headrail 46 or a roller blind2, and having a wand 14 provided with solar cells 22. The roller blind 2 shown in Fig. 9 isequipped with a rechargeable battery which can be removed from the roller blind 2 byopening a battery compartment door 56. Thus, the battery can be removed from the rollerblind 2 if additional charging of the battery is needed, or if the battery needs to be replaced.

Figs 10a-b show an alternative embodiment of a motorized solar powered windowcovering device 1 having a wand 14 provided with solar cells 22 for charging a batteryarranged at the headrail 46 similar to the embodiment shown in Fig. 9. The wand 14 shown in Figs. 10a-b is not arranged at the far end of the headrail 46 but instead arranged at about cm from the end of the headrail 46 which might allow the wand 14 to get optimalsunlight exposure. The optimal placement of the wand 14 from a solar exposure perspectivehowever might vary from 0-30 cm from the end of the headrail depending on e.g. windowsize. The wand 14 shown in Figs 10a-b can have any suitable mechanical connection means16 and electrical connection means 20, such as any ofthe embodiments described above.The control of the movement ofthe motorized solar powered window covering device 1, i.e.control of movement of the roller blind fabric 4, shown in Figs. 10a-b is handled wirelesslyusing e.g. ZigBee communication standard or any other suitable wireless communication. Apushbutton 66 is communicating wirelessly with communication means arranged at theroller blind motor to control start, stop, and movement direction of the motor. Fig. 10ashows a hand of a user pushing the pushbutton 66, or holding in the pushbutton 66, to startthe downwards movement of the roller blind fabric 4 which is illustrated by arrow G. Fig.10b shows a hand of a user pushing the pushbutton 66, or holding in the pushbutton 66, tostart the upward movement of the roller blind fabric 4 which is illustrated by arrow H. Thepushbutton 66 could alternative be a remote control which is not fixedly arranged at thewindow, or arranged in a holder at the window, or it could be integrated in a smartphoneapplication etc.

Fig. 11 shows a motorized solar powered window covering device 1 in the shape of avenetian blind 80. The window cover 4 is in this embodiment thus formed by horizontal slats82. An electrical motor, rechargeable battery powering the motor, and electrical connectionmeans, are arranged inside the head rail 84, and is not visible in Fig. 11. Two strings 86 arearranged at the side ofthe venetian blinds and can be used for lowering and rising the slats82 in the same manner as for non-motorized venetian blind. Alternatively the string may beremoved and the motor may be used for lowering and rising the slats 82. A wand 14provided with solar cells 22 is connected to the head rail 84 by means of any suitablemechanical connection means 16 and electrical connection means 20, such as any of theembodiments described above. Thus, the wand 14 is used for powering the motorized solarpowered window covering device 1 to tilt the slats 82 and/or to rise and lower the slats 82.

Fig. 12 shows a motorized solar powered window covering device 1 in the shape ofcurtain rail 90. The window cover 4 is in this embodiment formed by textile panels 92. Anelectrical motor, rechargeable battery powering the motor, and electrical connection means, are arranged inside a rail 94, and is not visible in Fig. 12. A wand 14 provided with 11 solar cells 22 is connected to the rail 94 by means of any suitable mechanical connectionmeans 16 and electrical connection means 20, such as any ofthe embodiments describedabove. Thus, the wand 14 shown in Fig. 12 is used for powering the motorized solarpowered window covering device 1 move the panels horizontally to cover and uncover thewindow 24.

The electric motor has not been described in detail however any suitable type ofelectrical motor for motorized blinds can be used. The motor may be arranged in a hollowtube or rail of the of the motorised solar powered window covering device, and the rotor ofthe motor can e.g. be connected to a shaft for rotating the tube holding the roller blind, inthe roller blind embodiments. For embodiments where the motor is actuating a horizontalmovement of a curtain, the motor can be arranged at the rail and connected wires movingthe curtain panels at the rail. The electrical motor is preferably a low voltage, direct currentmotor and is supplied with direct current of 24V produced by the rechargeable batterywhich is electrically connected to the electric motor. The battery is charged by the means ofthe solar cells arranged at the wand.

The electrical wand connection means is described as is can comprise a USB contact.lt I realised that any suitable electrical connection can be used.

The solar cells can be connected to the wand in different ways. Some examples areshown where, such as the solar cell film or solar arranged inside a transparent tube. Thesolar cells may in addition be attached to the external side of the wand my other means,such as glue etc.

Although the present invention has been described above with reference to specificembodiments, it is not intended to be limited to the specific form set forth herein. Rather,the invention is limited only by the accompanying claims. For instance the battery has beenexplained as located in the roller blind tube, however it is also possible that the battery isarranged in the wand and thereby the electrical wand connector transports electricity fromthe battery to the motor.

Some specific types of solar cells are mentioned inhere however several other typesof solar cells could also be considered for the wand of the motorised solar powered windowcovering device. The word solar cells has inhere been used to describe an electrical device that coverts energy of light into electricity. 12 As non-limiting examples of window covers are given roller blinds, honeycombblinds, venetian blinds, roman blinds, curtains, and panel curtains, however the motorized solar powered window covering device may be used for any type of suitable window cover.

Claims

1. Motorized solar powered window covering device comprising an electrical motor (40) arranged to actuate a window cover (4) at a window (24), power storage means (36),solar cells (22), driver electronic means (42) for controlling the charging of the powerstorage means (36) by the solar cells (22) and controlling the motor (40) actuating thewindow cover (4), and a wand (14) arranged to be hanging at the motorized solar poweredwindow covering device (1) by means of mechanical wand connection means (16), c h a r a c t e ri s e d in t h a t the solar cells (22) are arranged at the wand (14) and thewand (14) is arranged to be in electrical connection with the motorized solar powered window covering device (1) by means of electrical wand connection means (20).

2. Motorized solar powered window covering device (1) according to claim 1, wherein the solar cells (22) are integrated in the wand (14).

3. Motorized solar powered window covering device (1) according to anyone of theprevious claims, wherein the wand (14) has a handle portion (54) for a user to pull and/or turn the wand (14) to control the position or motion of the window cover (4).

4. Motorized solar powered window covering device (1) according to any of theprevious claims, wherein the wand (14) comprises a tube (70) having at least onetransparent portion and wherein the solar cells (22) are arranged inside the tube (70) at the transparent portion.

5. Motorized solar powered window covering device (1) according to claim 4,wherein the solar cells (22) comprises a solar cell film (72) arranged inside the transparent tube (70).

6. Motorized solar powered window covering device (1) according to any of theprevious claims, wherein the electrical wand connection means (20) and the mechanical wand connection means (16) are arranged in a common connection structure (74).

7. Motorized solar powered window covering device (1) according to any of theprevious claims, wherein the wand (14) has a total length of least 30 cm, preferably at least 40 cm.

8. Motorized solar powered window covering device (1) according to any of theprevious claims, wherein the wand (14) has a width of between 0.3 cm - 5 cm, preferably between 1 cm - 3 cm.

9. Motorized solar powered window covering device (1) according to anyone of theprevious claims, wherein the mechanical wand connection means (16) and the electricalwand connection means (20) are detachable from the window covering device (1) allowing the wand (14) to be detachable from the window covering device (1).

10. Motorized solar powered window covering device (1) according to anyone of theprevious claims, comprising wireless control means (68) for controlling the motion of the window cover (4) wirelessly.