Window blind for a motor vehicle

Abstract

Window blind (1) for a motor vehicle, in particular rear window blind, with a rotatable and stationary winding shaft (2) extending in a width direction (BR) of the window blind, with a roller blind web (3) that can be wound onto and unwound from the winding shaft (2), with an extension profile (4) having two ends (6) and extending in the width direction (BR) of the window blind (1) for extending and retracting the blind (3), with a drive (16) with an electric drive motor (5) and with two flexible drive members (7) which are displaceably guided on both sides of the roller blind (3) and which connect the drive (16) to the two ends (6) of the pull-out profile (4) to drive the pull-out profile (4), characterized by that the window blind (1) comprises at least one drive shaft (8) which is rotatably and stationary and extends parallel to the winding shaft (2) and connects the drive (16) to at least one of the drive members (7).

Description

The present invention relates to a window roller blind for a motor vehicle, in particular a rear window roller blind, having a winding shaft which is mounted rotatably and in a fixed manner and extends in a width direction of the window roller blind, having a roller blind web which can be wound onto the winding shaft and can be unwound therefrom, having a pull-out profile which has two ends and extends in the width direction of the window roller blind for pulling out and retracting the roller blind web, having a drive having an electric drive motor and having two flexible drive members which are guided displaceably on both sides of the roller blind web and which, for driving the pull-out profile, connect the drive to the two ends of the pull-out profile.Window roller blinds for motor vehicles have become known in various embodiments in the prior art. Frequently, such window roller blinds are used in the area of rear windows. These usually have a winding shaft which is arranged in a fixed and rotatable manner and on which a roller blind web can be wound, and a pull-out profile by means of which the roller blind web can be unwound from the winding shaft. The roller blind web is extended or retracted again by means of a pull-out profile guided in guide rails. For driving the pull-out profile, such window roller blinds have a drive with an electric drive motor.DE 10 2006 017 883 A1 discloses such a window roller blind for a window of a motor vehicle. The rotational movement of the electric drive motor is transmitted via a gearwheel to flexible drive members such as pitch cables, which in turn are connected to the pull-out profile at their ends facing away from the electric drive motor. The electric drive motor is arranged in the middle of the window roller blind in this configuration in order to ensure a symmetrical arrangement of the drive members and a uniform actuation of the pull-out profile. The flexible drive members accordingly extend from their fastening point on the pull-out profile in the guide rails as far as beyond the electric drive.It is an object of the present invention to propose a window roller blind for a motor vehicle which enables comfortable actuation.The object is achieved by a window roller blind having the features of claim 1.A window roller blind for a motor vehicle, in particular a rear window roller blind, has a winding shaft which is mounted rotatably and in a fixed position and extends in a width direction of the window roller blind, a roller blind web which can be wound onto the winding shaft and can be unwound from the latter, a pull-out profile which has two ends and extends in the width direction of the window roller blind for pulling out and retracting the roller blind web, and a drive having an electric drive motor and two flexible drive members which are guided displaceably on both sides of the roller blind web. The drive members connect the drive to the two ends of the pull-out profile for driving the pull-out profile.It is proposed that the window roller blind comprises at least one drive shaft which is mounted rotatably and in a fixed position and extends parallel to the winding shaft and connects the drive to at least one of the drive members. Unlike in the prior art, the electric drive motor thus does not drive the drive elements directly, but only indirectly via the at least one drive shaft. This offers several advantages. On the one hand, the arrangement of the components of the window roller blind is substantially more flexible. Due to the at least one drive shaft, it is no longer necessary to arrange the electric drive motor necessarily centrally of the window roller blind. In addition, it is also possible to contact the drive members, for example close to the guide rails, by means of the drive shaft, so that they can be made substantially shorter and must have shorter overlengths. For the same reason, guide tubes for guiding the free overlengths of the drive members can therefore also be made shorter. As a result, the drive members can be moved more easily in the shorter guide tubes and the guide rails, which increases the operating comfort.Furthermore, it is advantageous if the at least one drive shaft is connected to the at least one of the drive members via a drive pinion. The drive pinion can thereby be matched exactly to the drive member, for example to the pitch of a pitch cable, and the rotation of the drive shaft can be transmitted directly to the drive member. This ensures reliable and play-free transmission of force and thus precise control of the roller blind web movement.It is likewise advantageous if the window roller blind further comprises a lateral guide rail and the drive pinion is arranged directly below the guide rail with respect to a pull-out direction of the window blind. This optimizes the transmission of force to the drive members, since the force can be introduced exactly where it is required. At the same time, the overlengths of the drive members can thereby be reduced, since the length of the drive members must substantially only correspond to the distance which the pull-out profile must cover when the roller blind web is being moved in and out. The length of the guide tubes for the drive members can likewise be further reduced as a result.It is particularly advantageous here that the drive members do not have to be pushed or pulled through long guide tubes when the roller blind web is extended with great force exertion. In contrast, in the prior art, the drive members had to be guided up to the drive motor, which is usually placed centrally, and conveyed through long guide tubes. Likewise, the excess lengths produced when the roller blind web was inserted had to be accommodated. In addition, the arrangement below the guide rail reduces the installation height and simplifies the assembly.Furthermore, it is advantageous if a damping device is arranged between the at least one drive shaft and the drive. The damper device reduces vibrations and operating noises. This results in smoother and more comfortable operation and reduces wear.It is likewise advantageous if the drive motor is designed as a geared motor and / or if the drive includes a gear. A geared motor enables a precise adaptation of the torque and the speed. This increases the control over the movement of the roller blind. In particular, however, a gear or a drive motor designed as a geared motor also enables a flexible arrangement of the drive motor with respect to the drive shaft. Alternatively, however, it is possible, in particular if the drive shaft is designed as a toothed shaft, for the drive motor to drive the drive shaft directly.It is also advantageous if a further damping device is arranged between the at least one drive shaft and the drive pinion. The further damping device in the region of the drive pinion also contributes to reducing vibrations and noises and thus to achieving a comfortable operation of the window roller blind. In addition, the damping device protects the drive shaft and the drive pinion from wear, which increases the service life of the window roller blind.Advantages are obtained if the damping device and / or the further damping device includes a damping sleeve in which the at least one drive shaft is mounted. The damping sleeve ensures a reduction of oscillations and vibrations during operation and can be arranged in a compact installation space.It is accordingly advantageous if the damping sleeve of the damping device is arranged in an output gearwheel of the drive. The arrangement in the output gearwheel enables direct damping of torque peaks, and the damping device which directly surrounds the drive shaft can be designed to be particularly compact.It is likewise advantageous if the damping sleeve of the further damping device is arranged in the drive pinion. This likewise enables a compact arrangement of the damping device and a targeted damping of the forces which are transmitted to the drive members by the drive pinion.If a damping device is also provided both between the drive pinion and the drive shaft and between the driven gear and the drive shaft, this also allows oblique positions of the drive shaft to be compensated for at the same time, for example on account of assembly tolerances.Advantages also entail if the at least one drive shaft is designed as a spline shaft or as a toothed shaft. This ensures a positive force transmission without slipping. This improves the efficiency of the drive system and the load capacity of the shaft. In addition, higher torques can also be transmitted in this way.Furthermore, it is advantageous if the window roller blind comprises two, in particular coaxial, drive shafts, which each extend from the drive to the drive members. The use of two coaxial drive shafts instead of a continuous drive shaft likewise ensures a symmetrical introduction of force onto the pull-out profile, but allows a substantially more flexible arrangement of the drive shafts and of the drive motor and, if appropriate, of the transmission. In this way, it is also possible in particular to design the drive shafts to be of different lengths and to arrange the drive motor eccentrically.Accordingly, it is advantageous if the drive, in particular a drive motor of the drive, is arranged eccentrically with respect to the width direction of the window roller blind. The flexible placement of the drive motor also eccentrically facilitates the integration of the window roller blind into different vehicle types.It is likewise advantageous if an axis of rotation of the drive motor is arranged offset by 90° with respect to the drive shaft. This also allows a flexible placement of the drive motor taking into account the space conditions in the respective vehicle.It is also advantageous if the drive is mounted on a roller blind cassette of the window roller blind. The bearing on the roller blind cassette ensures a stable attachment and reduces the transmission of vibrations between the vehicle structure and the window roller blind. This contributes to smooth operation and a longer drive life.It also entails advantages if the drive is rubber-mounted. A rubber mount of the drive absorbs vibrations and oscillations during operation. This reduces the noise generation and ensures a more comfortable operation of the window roller blind.Further advantages of the invention are described in the following exemplary embodiments. The following are shown: FIG. 1 shows a schematic view of a window roller blind according to the prior art as a overview, FIG. 2 shows a schematic view of a window roller blind according to the invention as an overview illustration according to a first embodiment, FIG. 3 shows a schematic view of a window roller blind according to the invention as an overview illustration according to a second embodiment, FIG. 4 shows a schematic detailed view of a transmission and of a damping device between a drive motor and a drive shaft, FIG. 5 shows a schematic detailed view of a drive pinion with a damping device FIG. 6 is a schematic view of a continuous drive shaft for a window roller blind, FIG. 7 is a schematic view of two coaxially extending drive shafts for a window roller blind according to a first embodiment, FIG. 8 is a schematic view of two coaxially extending drive shafts for a window roller blind according to a second embodiment, FIG. 9 shows a schematic detailed view of a damping device in a drive pinion or a driven gearwheel according to a further embodiment, and FIG. 10 shows a schematic view of a roller blind cassette of a window roller blind with a drive mounted thereon.In the following description of the exemplary embodiments, features which are identical and / or at least comparable in terms of their configuration and / or mode of action in the different figures are each provided with the same reference symbols. Furthermore, features are usually explained in detail only when mentioned for the first time, while in the following exemplary embodiments only the differences from the already described exemplary embodiments are discussed. If features are not explained in detail again, their configuration and / or mode of action corresponds to the configuration and mode of action of the features already described with reference to one or more of the preceding figures. In addition, for reasons of clarity of a plurality of identical components or features, often only one or only a few are labeled.FIG. 1 shows a schematic view of a window roller blind 1 according to the prior art, which is provided in particular for arrangement in front of a rear window of a motor vehicle, as an overview illustration. The window roller blind 1 comprises a roller blind web 3 which is connected at its first end to a winding shaft 2 which is mounted rotatably and in a fixed manner and at its second end to a pull-out profile 4 which has two ends. The pull-out profile serves for pulling out and retracting the roller blind web. The winding shaft 2 and the pull-out profile 4 each extend with their length in a width direction BR of the window roller blind 1. The winding shaft 2 with the wound-up roller blind web 3 can be arranged in a roller blind cassette 15 which, as shown here, can be configured merely as a carrier or can completely surround the winding shaft. The winding shaft 2 is mounted in the present case in bearing pieces 18, which in turn are connected to the roller blind cassette 15. For pulling out the roller blind web 3, the pull-out profile 4 is movable in a pull-out direction AR. On the lateral regions of the window roller blind 1, guide rails 10 are arranged in the motor vehicle. The guide rails 10 define the pull-out direction AR and guide the pull-out profile 4 during the movement in the pull-out direction AR. For guiding the pull-out profile 4, drivers 22 are displaceably mounted in the guide rails 10, which in turn are connected to the pull-out profile 4.The window roller blind 1 has a drive 16 for winding and unwinding the roller blind web 3 onto the winding shaft 2. The drive 16 has an electric drive motor 5 in a manner known per se. The window roller blind 1 further comprises two flexible drive members 7, which are displaceably guided on both sides of the roller blind web and which connect the drive 16 for driving the pull-out profile 4 to the two ends 6 of the pull-out profile 4.According to the embodiment of the prior art, the electric drive motor 5 is arranged in the middle of the window roller blind 1. The drive members 7 extend from the ends 6 of the pull-out profile in the guide rails 10 through guide tubes 17 as far as the electric drive motor 5 and a certain distance beyond it. The flexible drive members 7 are guided in a known manner in the guide tubes 17 and in the guide rails 10 so as to be secure against buckling. A motor pinion 20 of the drive motor 5 or, if appropriate, if the drive 16 comprises a transmission 19 (not shown here), also a driven gearwheel 13 of the drive 16, is directly in engagement with the drive members 7 for driving the latter. At their ends facing away from the drive 16, the drive members 7 are connected to the drivers 22.In contrast to the embodiment shown as a rear window roller blind, the window roller blind 1 could also be arranged in front of another window, such as a side window, for example, or else on a vehicle roof.The arrangement according to the prior art has proved to be widely successful, but has several disadvantages. Thus, it often requires a great exertion of force to transport the drive members 7 through the guide tubes 17. When the roller blind web 3 is retracted, large excess lengths of the drive members 7 are also produced, which must be securely accommodated so that they do not become caught on one another or on other components of the vehicle. The arrangement also offers little flexibility, since it is generally necessary to place the electric drive motor 5 centrally of the window roller blind 1 with respect to the width direction BR.FIG. 2 shows a schematic view of a window roller blind 1 according to the invention according to a first embodiment as an overview. In contrast to FIG. 1, the drive 16 is not directly connected to the drive members 7 but rather much more by means of a drive shaft 8, the drive shaft 8 likewise extends with its length in the width direction BR of the window roller blind 1 and is driven by the drive 16. The drive shaft 8 is likewise mounted rotatably and in a fixed position and extends parallel to the winding shaft 2 of the window roller blind 1, the drive shaft 8 being additionally provided at its two ends in each case with a drive pinion 9, which in turn is in engagement with one of the drive members 7 and thereby drives the latter. According to the present illustration, the drive shaft 8 is likewise mounted in the bearing pieces 18, which also mount the winding shaft 2 and which can also be designed, for example, as end pieces of a roller blind cassette 15, not illustrated here. The drive 16 comprises a drive motor 5, the axis of rotation 14 of which extends in the present case offset by 90° with respect to the drive shaft 8. Between the drive shaft 8 and the electric drive motor 5, a transmission 19 is furthermore provided, which is formed in the present case by the motor pinion 20 and an output gearwheel 13 connected to the drive shaft 8. In contrast to the illustration shown, the gear 19 can also be integrated into the drive motor 5, which in this case is designed as a geared motor.According to the present illustration, the two drive pinions 9 are furthermore arranged directly below the guide rails 10 with respect to the pull-out direction AR of the window roller blind 1, or the drive shaft 8 is placed in such a way that the drive pinions 9 are positioned directly below the guide rails 10. This makes it possible to introduce the force for moving the driving members 7 directly where it is required.Thus, when the roller blind web 3 is pulled out in particular, it is not necessary to push the drive members 7 through long guide tubes 17.By the intermediate connection of the drive shaft 8, which drives the drive members 7, the drive members 7 and thus also the guide tubes 17 can additionally be configured to be substantially shorter, as a result of which material is saved and the transport of the drive members 7 in the guide tubes 17 is further facilitated.Through the intermediate connection of the transmission 19, it is also possible to arrange the electric drive motor 5 comparatively freely and thereby also to align the rotation axis 14 as desired and spatial conditions. As can be seen from the present illustration, the drive motor 5 is arranged, for example, eccentrically. The gear 19 is in the present case designed as a bevel gear, which enables the arrangement of the drive motor 5 with a rotational direction offset by 90°.FIG. 3 shows a schematic view of a window roller blind 1 according to the invention according to a further embodiment as an overview. In contrast to the embodiment of FIG. 2, the axis of rotation 14 of the electric drive motor 5 extends here parallel to the winding shaft 2 and also to the drive shaft 8, and the transmission 19 is in the present case correspondingly designed as a spur gear transmission and is likewise formed by the motor pinion 20 and an output gear 13 which is connected to the drive shaft 8. In the present case, the drive motor 5 is arranged centrally of the window roller blind 1 with respect to the width direction BR. In contrast to the illustration shown, however, an off-center arrangement would likewise be possible.FIGS. 2 and 3 show, merely by way of example, different arrangement possibilities of the individual components of the window roller blind 1, for example, it is also conceivable to arrange the drive shaft 8 somewhat further away from the winding shaft 2. Accordingly, the drive pinions 9 also do not necessarily have to be positioned directly below the guide rails 10. It would also be conceivable for the drive pinions 9 to be in engagement with the drive members 7 through an opening of the guide tubes 17. The drive motor 5 can also be positioned both centrally and eccentrically, regardless of the orientation of its rotational axis 14 and the design of the transmission 19. Furthermore, it is also conceivable that the electric drive motor 5 is directly connected to the drive shaft 8 without the intermediate connection of a transmission 19, which in this case can be designed as a toothed shaft. Finally, it is also not absolutely necessary for the drive shaft 8 to extend over the entire width of the window roller blind 1. The drive shaft 8 could also be interrupted or two coaxially running drive shafts 8 could be provided, as will be shown below with reference to FIGS. 6 to 8.FIG. 4 shows a schematic detailed view of a transmission 19 and a damping device 11 between a drive motor 5 (not shown here) and a drive shaft 8, only the motor pinion 20 and the rotational axis 14 of the drive motor being visible here. The transmission 19 is also designed as a spur gear transmission in the present case, which is not decisive here, however. The motor pinion 20 is in mesh with an output gear 13 which in turn drives the drive shaft 8. The rotational movement of the motor pinion 20 is thus transmitted to the output gear 13, whereby the drive shaft 8 is set in rotation.According to FIG. 4, a damping device 11 is arranged between the drive shaft 8 and the drive 16, here the transmission 19. The damper 11 is configured to reduce vibration and torque fluctuation during the rotation of the input shaft 8. According to the present exemplary embodiment, the damping device 11 comprises a damping sleeve 12 which surrounds the drive shaft 8 and ensures elastic mounting of the drive shaft 8 within the output gearwheel 13. This achieves a compact and vibration-damping arrangement which enables a smooth and quiet rotational movement of the drive shaft 8.FIG. 5 shows a schematic detailed view of a drive pinion 9 with a damping device 11. the drive pinion 9 serves to transmit the rotational movement of the drive shaft 8 to the drive members 7, not shown here. A damping device 11 is likewise arranged between the drive shaft 8 and the drive pinion 9. The damping device 11 shown here also comprises a damping sleeve 12 which is arranged between the drive shaft 8 and the drive pinion 9 in the present case or in which the drive shaft 8 is mounted. The damping sleeve 12 ensures an elastic mounting of the drive shaft 8 within the drive pinion 9, as a result of which a uniform transmission of force between the drive shaft 8 and the drive pinion 9 is made possible.FIGS. 4 and 5 show, merely by way of example, an advantageous embodiment of a damping device 11 as a damping sleeve 12. Thus, for example, the drive shaft 8 could also be mounted within the bearing pieces 18 in a damping device 11.FIG. 6 shows a schematic view of a continuous drive shaft 8 for a window roller blind 1. The drive shaft 8 is rotatably mounted at both ends in a bearing piece 18. Also shown at the two ends of the drive shaft 8 are two drive pinions 9, which are each coupled to the drive shaft 8 by a damping device 11 (not designated here). As described in FIG. 5, the damping device 11 comprises in each case a damping sleeve 12 which is arranged between the drive shaft 8 and the drive pinion 9. Furthermore, in the present case, an output gearwheel 13 is arranged centrally on the drive shaft 8, which transmits the rotational movement from the motor pinion 20 (not illustrated) to the drive shaft 8 and which is likewise coupled to the drive shaft 8 via a damping device 11 (not denoted here) which likewise contains a damping sleeve 12. Because the drive shaft 8 is mounted in a damping sleeve 11 both in the driven gearwheel 13 and in the two drive pinions 9, it is also possible to compensate for oblique positions of the drive shaft 8, which can result from assembly tolerances or else production tolerances.FIG. 7 shows a schematic view of two coaxially running drive shafts 8 for a window roller blind 1 according to a first embodiment. In contrast to the embodiment of FIG. 6, the drive shaft 8 is therefore not configured continuously over the width of the window roller blind 1. Each of the two coaxial drive shafts 8 is mounted at its end facing away from the drive 16 (not shown here) in a bearing piece 18. Likewise, each drive shaft 8 has a drive pinion 9 with a damping sleeve 12, in which the drive shaft 8 is elastically mounted. Between the two drive shafts 8 there is again arranged centrally an output gearwheel 13 which transmits the rotational movement of the drive motor 5 (not shown here) to the drive shafts 8. According to the present illustration, each of the drive shafts 8 is mounted in its own damping sleeve 12 within the output gearwheel 8. This arrangement also makes it possible to compensate for oblique positions of the drive shafts 8 or to compensate for assembly tolerances of the components which are in engagement with one another.FIG. 8 also shows a schematic view of two coaxially running drive shafts 8 for a window roller blind 1 according to a second embodiment. In contrast to the embodiment of FIG. 7, the two drive shafts 8 have different lengths, so that the driven gearwheel 13 is arranged eccentrically accordingly. Here, too, each of the drive shafts 8 is in turn mounted within the output gearwheel 13 by means of a damping sleeve 12 in each case.FIGS. 6 to 8 are also to be understood merely as examples and illustrate the manifold arrangement possibilities with respect to the drive shaft(s) 8 and the driven gearwheel 13 and thus the drive 16 or the drive motor 5.FIG. 9 shows a schematic detailed view of a damping device 11 in a drive pinion 9 or an output gearwheel 13 according to a further embodiment. The damping device 11 also comprises a damping sleeve 12. This enables a particularly good and slip-free transmission of the torque from the output gearwheel 13 to the drive shaft 8 or from the drive shaft 8 to the drive pinion 9. As in FIGS. 4 and 5, the drive shaft 8 is mounted in the damping sleeve 12, whereby an elastic mounting of the drive shaft 8 is achieved within the drive pinion 9 or the driven gear 13. In this case, the damping sleeve 12 has a shape adapted to the spline shaft, which permits a transmission of the torque.FIG. 10 finally shows a schematic view of a roller blind cassette 15 of a window roller blind 1 with a drive 16 mounted thereon. The roller blind cassette 15 serves for receiving the winding shaft 2 (not visible here) and for guiding the roller blind web 3 (not shown) during the pulling-out and pulling-in process. The drive 16 with the drive motor 5 is mounted on the roller blind cassette elastically by means of one or more rubber bearings 21. In the present case, only one rubber bearing 21 can be seen, by means of which the drive motor 5 is fastened to the roller blind cassette 15. The elastic mounting of the drive motor also contributes to the reduction of oscillations and operating noises, whereby the operating comfort of the window roller blind is increased.The present invention is not limited to the illustrated and described embodiments. Modifications within the scope of the patent claims are also possible.List of reference characters1 Window roller blind 2 Winding shaft 3 Roller blind web 4 Pull-out profile 5 Drive motor 6 End 7 Drive member 8 Drive shaft 9 Drive pinion 10 Guide rail 11 Damping device 12 Damping sleeve 13 Driven gearwheel 14 Axis of rotation 15 Roller blind cassette 16 Drive 17 Guide tube 18 Bearing piece 19 Transmission 20 Motor pinion 21 Rubber bearing 22 Driver BR Width direction AR Pull-out directionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2006 017 883 A1

[0003]

Claims

Window roller blind (1) for a motor vehicle, in particular a rear window roller blind, having a winding shaft (2) which is mounted rotatably and in a fixed position and extends in a width direction (BR) of the window roller blind, having a roller blind web (3) which can be wound onto the winding shaft (2) and can be unwound from the latter, having a pull-out profile (4) which has two ends (6) and extends in the width direction (BR) of the window roller blind (1) for pulling out and retracting the roller blind web (3), having a drive (16) having an electric drive motor (5) and having two flexible drive members (7) which are guided displaceably on both sides laterally of the roller blind web (3) and which connect the drive (16) to the two ends (6) of the pull-out profile (4) in order to drive the pull-out profile (4), characterized in that, the window roller blind (1) comprises at least one drive shaft (8) which is rotatably and fixedly mounted and extends parallel to the winding shaft (2) and connects the drive (16) to at least one of the drive members (7).Window roller blind (1) according to the preceding claim, characterized in that the at least one drive shaft (8) is connected to the at least one of the drive members (7) via a drive pinion (9).Window roller blind (1) according to one of the preceding claims, characterized in that the window roller blind (1) further comprises a lateral guide rail (10), and in that the drive pinion (9) is arranged directly below the guide rail (10) with respect to a pull-out direction (AR) of the window roller blind (1).Window roller blind (1) according to one of the preceding claims, characterized in that a damping device (11) is arranged between the at least one drive shaft (8) and the drive (16).Window roller blind (1) according to one of the preceding claims, characterized in that the drive motor (5) is designed as a geared motor and / or in that the drive motor (5) contains a gear mechanism.Window roller blind (1) according to one of the preceding claims, characterized in that a further damping device (11) is arranged between the at least one drive shaft (8) and the drive pinion (9).Window roller blind (1) according to one of the preceding claims, characterized in that the damping device (11) and / or the further damping device (11) contains a damping sleeve (12), in which the at least one drive shaft (8) is mounted.Window roller blind (1) according to one of the preceding claims, characterized in that the damping sleeve (12) of the damping device (11) is arranged in an output gearwheel (13) of the drive (16).Window roller blind (1) according to one of the preceding claims, characterized in that the damping sleeve (12) of the further damping device (11) is arranged in the drive pinion (9).Window roller blind (1) according to one of the preceding claims, characterized in that the at least one drive shaft (8) is designed as a splined shaft or as a toothed shaft.Window roller blind (1) according to one of the preceding claims, characterized in that the window roller blind (1) comprises two, in particular coaxially running, drive shafts (8), which each extend from the drive (16) as far as the drive members (7).Window roller blind (1) according to one of the preceding claims, characterized in that the drive (16), in particular a drive motor (5) of the drive (16), is arranged eccentrically with respect to the width direction (BR) of the window roller blind (1).Window roller blind (1) according to one of the preceding claims, characterized in that an axis of rotation (14) of the drive motor (5) is arranged offset by 90° with respect to the drive shaft (8).Window roller blind (1) according to one of the preceding claims, characterized in that the drive (16) is mounted on a roller blind cassette (15) of the window roller blind (1).Window roller blind (1) according to one of the preceding claims, characterized in that the drive (16) is rubber-mounted.

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