Roller blinds on the roof

Abstract

The present invention relates to a vehicle roller blind device (3), comprising: a roller blind web (4), which is wound on a winding shaft (8) which is rotatably supported and prestressed in a winding direction by means of a tensioning spring (25); and a tensioning bracket (5), which is connected to the extension end of the roller blind web (4) and is movably supported on both sides on guide rails (7), and in order to wind the roller blind web (4) onto or unwind it from the winding shaft, the tensioning bracket can be adjusted along the guide rails (7), in particular by means of a drive device, wherein the tensioning spring (25, 45) is tensioned between the winding shaft (8) and a spring support part (23) which is rotatably supported, in particular, coaxially with the winding shaft (8), and an adjusting device adjusts the spring support part (23) relative to the winding shaft (8) to set a spring prestressing force that matches the extension length of the roller blind web (4).

Description

Technical Field

[0001] The present invention relates to a vehicle roller blind device, comprising: a roller blind web, which is wound on a winding shaft that is rotatably supported and prestressed in a winding direction by means of a tensioning spring; and a tensioning bracket, which is connected to the extension end of the roller blind web and is movably supported on both sides on guide rails. In order to wind the roller blind web onto the winding shaft or unwind it from the winding shaft, the tensioning bracket can be adjusted along the guide rails, in particular by means of a drive device. Background Art

[0002] A vehicle roller blind device of this type is known from DE 10 2017 111 734 A1. A winding shaft is prestressed in the winding direction by means of a tensioning spring. The tensioning spring is fixed to the winding shaft on one hand and to a fixed bearing on the other. As the roller blind web is unwound, the rotating winding shaft tensions the tensioning spring with increasing extension lengths. Extended extension lengths are limited and cannot be adjusted due to the resulting excessive spring deflection and spring tension. Summary of the Invention

[0003] The object of the present invention is to provide a vehicle roller blind device of the type mentioned in the introduction which is improved with respect to a greater extension length of the roller blind web.

[0004] This object is achieved according to the invention in the vehicle roller blind device described at the outset in that a tensioning spring is tensioned between a winding shaft and a spring support part which is rotatably mounted, in particular coaxially with the winding shaft, and an adjusting device adjusts the spring support part relative to the winding shaft in order to set a spring prestressing force which is matched to the extended length of the roller blind web.

[0005] Advantageous embodiments of the invention are specified in the dependent claims.

[0006] The spring support component can be adjusted relative to the winding shaft via an adjustment device, so that the spring prestress can be matched to the respective extended length of the blind web. This allows the spring prestress to be set to a desired permissible value or permissible value range. This also prevents an undesirable or impermissible increase in the spring prestress at greater extended lengths of the blind web. Thus, when the blind web is unwound from the winding shaft by rotating the winding shaft during retraction, the spring prestress set in the wound blind web or in the opened blind can, for example, be kept as constant as possible or increase only slightly.

[0007] The winding shaft can, for example, be a straight, rigid tube. Alternatively, it can be a flexible tube that is rotatably supported on bearings on both sides with a slight curvature in the axial direction, the curvature being adapted, for example, to the curvature of the roof surface to be covered. Furthermore, in both cases, a rigid, rotationally rigid central shaft can be passed through the tubular winding shaft, the central shaft being designed to be straight or curved accordingly. Furthermore, the winding shaft can also be designed as a solid cylinder, particularly also made of foamed plastic, so that it can rotate with the curved rotation axis.

[0008] The tensioning spring is in particular a helical spring, a coil spring or a spring spring or a coil spring which can rotate under torsional load and is wound, for example, helically. The helical spring can preferably have a large axial length, while the helical spring or spring spring or coil spring can be designed as a spring unit which is very narrow in the axial direction and requires only a small axial installation space.

[0009] The following structural design, which describes the tensioning of the tensioning spring between the winding shaft and the spring support element, provides the tensioning function of the tensioning spring. Thus, the arrangement of the tensioning spring can be, for example, arranged inside the tubular winding shaft, or outside the winding shaft and axially adjacent to the winding shaft, and is generally not restricted.

[0010] In the case of a conventional vehicle roller blind device with a tensioning spring that is fixedly tensioned on both sides, a large extension length of the roller blind web, for example 2000 mm, requires, for example, approximately 20 rotations of the winding shaft, and this rotation of the winding shaft is directly converted into 20 tensioning rotations of the tensioning spring. In the case of the vehicle roller blind device according to the invention, by correspondingly adjusting the spring support part, the change in the prestress of the tensioning spring can be set to, for example, only 3 tensioning rotations.

[0011] It is therefore expedient for the adjustment device to rotate the spring support element in the direction of rotation of the winding shaft when unwinding the roller blind web so that the spring prestressing force set in the wound roller blind web is maintained or changed only to a relatively small extent. When winding the roller blind web, the corresponding rotation of the spring support element takes place in the winding direction of the winding shaft.

[0012] The adjustment device can be designed in various ways. It can include a drive motor, such as an electric motor. The drive motor or electric motor drives the spring support element, for example, by direct coupling or by indirect coupling via a coupling element, such as an intermediate shaft or a push-pull cable. Alternatively, the drive motor or electric motor can form the spring support element or a portion of the spring support element. The drive motor or electric motor is controlled, for example, based on the rotational position of the winding shaft, the position of the tensioning support, or the position of a drive element for adjusting the tensioning support.

[0013] Furthermore, the adjustment device can have a drive element, such as a drive wheel, a friction wheel, a pinion, a cable drum, a belt drum or a rotating wheel or the like. The drive element is particularly arranged coaxially with the spring support component and is constructed on the spring support component or is connected to the spring support component in a rotationally fixed manner. The drive element or the drive wheel or the pinion is adjusted to cooperate with an adjustment element, such as a corresponding drive cable or rope or the like, which is connected to the tension support and can be adjusted by the drive motor. As is known, for example, from sunroof drives, the drive cable is particularly a diagonal cable. The drive wheel or the pinion can also be formed by a toothed ring, which is mounted on or at the spring support component. The drive cable can also be a so-called output cable, which consists of a section of the drive cable output by the drive motor, which section is opposite the drive section of the drive motor connected to the tension support.

[0014] Furthermore, the roller blind can also be actuated by manually moving the tensioning arm, wherein the coupling between the tensioning arm and the drive element can be realized, for example, by means of a drive cable or also by means of a rope.

[0015] According to a preferred embodiment, the spring-supporting element, the pinion, or the drive wheel can be coupled to the drive cable via a transmission and can be rotationally adjusted by the drive cable. This transmission can be used to adjust an acceleration or deceleration between the movement of the drive cable, and thus the rotation of the winding shaft, on the one hand, and the rotation of the spring-supporting element, on the other. Furthermore, the transmission can be used to adjust the drive cable extending to the cable guide and designed accordingly. The transmission preferably comprises a drive pinion, to which the drive cable is drivingly engaged, and a driven pinion, arranged on a common shaft, which engages a pinion coupled to the spring-supporting element. However, other transmission assemblies having more than two pinions can also be used.

[0016] According to a preferred embodiment, the first bearing and the second bearing receive and rotatably support the winding shaft between them. The tensioning spring is arranged inside the winding shaft or inside a part that rotates with the winding shaft, such as a bearing sleeve or the like. Alternatively, the tensioning spring can be arranged outside the winding shaft, for example, axially alongside the winding shaft, on a bearing that supports the spring support element.

[0017] The two bearings advantageously each contain a tensioning spring with a spring support element adjustable by an adjustment device, wherein the tensioning spring is preferably arranged outside the winding shaft. This design is particularly useful if the winding shaft is not torsionally rigid or if the winding shaft between the two lateral bearing sleeves or bearing pins does not consist of a winding component, such as a tube or cylindrical rod, but rather consists solely of a plurality of turns of roller blind web or roller blind material and is therefore not sufficiently torsionally rigid. This design is also useful if the driving torque of only a single tensioning spring is not sufficient. Therefore, the installation space available for the respective tensioning springs, which has only small dimensions, requires two small tensioning springs, each with a relatively low driving torque.

[0018] In a preferred embodiment, a tensioning spring, such as a spring or coil spring, is accommodated in a housing, which can be a spring support component and is connected to the drive wheel or pinion in a rotationally fixed manner. The housing is arranged on the shaft or also on the spring support component via a central hole and is particularly rotatably mounted thereon.

[0019] According to a preferred embodiment, a first bearing and a second bearing receive and rotatably support the winding shaft between them. The first bearing has a first bearing pin that rotatably supports a first bearing sleeve of the winding shaft, and the central shaft of the winding shaft is mounted on the first bearing pin at its first end in a rotationally fixed manner. The second bearing rotatably supports the spring support component relative to the fixed central shaft and the winding shaft. In this configuration, the central shaft can be not only linear but also curved, wherein the tubular winding shaft is flexible enough to adapt to the curve during rotation.

[0020] According to a further preferred embodiment, the second bearing has a bearing sleeve in which the spring support component is rotatably supported, wherein the pinion of the spring support component is arranged axially outside the bearing sleeve of the second bearing and the spring support component is rotatably supported on the central shaft on the axial inside by means of a sliding bearing.

[0021] According to another preferred embodiment, the spring support element has a central bearing section, wherein the second plain bearing sleeve of the winding shaft is rotatably supported on the central bearing section. Alternatively, the central bearing section can also be slidably supported in the bearing sleeve of the second bearing. The second plain bearing sleeve of the winding shaft is then slidably supported on the bearing sleeve of the second bearing.

[0022] According to a further preferred embodiment, it is provided that the second bearing has a fixed bearing pin which extends to the central shaft and is fixedly connected thereto, wherein the spring support part is rotatably supported on the bearing pin and the second plain bearing sleeve of the winding shaft is rotatably supported on a central bearing section of the spring support part.

[0023] According to a further preferred embodiment, the pinion of the spring support element can be arranged on a bearing pin of the second bearing. Alternatively, the pinion of the spring support element can be arranged on the bearing pin and mesh with a driven pinion that is rotatably supported on a bearing wall of the second bearing by means of a shaft, wherein the shaft carries the drivable pinion outside the bearing wall.

[0024] In principle, the vehicle roller blind arrangement can be arranged under the vehicle roof, as well as behind the vehicle window, and the extension direction can be in different directions due to a corresponding arrangement of the winding shaft and the guide rail.

[0025] Roller blinds are flat covering or covering elements which consist, for example, of a fabric or a film.

[0026] The vehicle roller blind device according to the present invention thus allows, by selecting the diameter of the pinion connected to the spring support component and / or by the configuration of the transmission, to achieve a very smooth, slightly decreasing, or "bowl-shaped," or even nearly constant spring characteristic curve for the tensioning spring over the entire extension length of the roller blind web. This allows for very long extension lengths, for example, at least 2000 mm. The tensioning spring is preferably designed so that it is strongly or maximally prestressed in the open position. When the roller blind is closed, the tensioning spring is tensioned by unwinding the roller blind web from the winding shaft, with the drive cable moving along with the closing movement of the roller blind. The spring end of the tensioning spring, which is supported on the spring support component, is driven by the co-moving pinion and relieves the tensioning spring, thereby generating the desired spring characteristic curve through superposition. This makes it possible, for example, for the tensioning spring to undergo only approximately three tensioning rotations for a 2000 mm extension length, instead of the 20 tensioning rotations required in conventional vehicle roller blind devices.

[0027] Since the ratio of spring tension to relief force is not constant due to the varying winding diameter of the roller blind web on the winding shaft, different characteristic curve types can be generated by the diameter of the pinion coupled to the spring support element or by an adjustable transmission ratio:

[0028] - Increasing (closing direction) → winding diameter < pinion diameter

[0029] -Descending (closing direction) → Winding diameter > Pinion diameter

[0030] - "Bowl-shaped" → winding diameter (blind open) > pinion diameter > winding diameter (blind closed).

[0031] The transmission or its components can be integrated, for example, on the spring support element and the pinion, for example, by means of injection molding.

[0032] The adjustment drive can be provided by the drive cable with its drive section connected to the tensioning support or by the output cable, which then has to be longer on one side. When using an output cable, the arrangement of the drive cable, the positioning of the roller blind web and the connection to the pinion is more flexible, making the entire arrangement easier to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be described in detail below with reference to the accompanying drawings using an embodiment of the vehicle roller blind device according to the present invention.

[0034] Figure 1 A vehicle having a roof with a transparent roof section and a vehicle roller blind arrangement for covering the roof section is shown in a top view;

[0035] Figure 2 A first embodiment of a vehicle roller blind device is shown in a cross-sectional view, comprising a winding shaft carried by the roller blind web, a tensioning spring, and an adjustably mounted spring support element;

[0036] Figure 3 A second embodiment of a vehicle roller blind arrangement is shown in cross section;

[0037] Figure 4 A third embodiment of a vehicle roller blind device is shown in cross section;

[0038] Figure 5 A fourth embodiment of a vehicle roller blind device is shown in cross section;

[0039] Figure 6 Shown in a three-dimensional diagram Figure 4 a bearing for a winding shaft having a spring support component integrated in the winding shaft and an adjustment device including a transmission;

[0040] Figure 7 The winding shaft is shown in cross section. Figure 6 The bearing shown in , which has a spring support component integrated in the winding shaft and an adjustment device including a transmission device;

[0041] Figure 8 One embodiment is shown in cross-section, similar to Figure 3The second embodiment shown in ;

[0042] Figure 9 A further embodiment is shown in cross section, which has a tensioning spring or spring spring arranged in a winding shaft;

[0043] Figure 10 An example of a winding spring is shown in three dimensions;

[0044] Figure 11 A further embodiment is shown in cross section, which has a spring arranged outside the bearing of the winding shaft;

[0045] Figure 12 Shown in cross section as Figure 11 A further embodiment of a variation of the embodiment shown in ;

[0046] Figure 13 A further embodiment of a vehicle roller blind device is shown in a top view, which comprises a spring arranged on two bearings of a winding shaft;

[0047] Figure 14 A further embodiment of a vehicle roller blind device is shown in a top view, which has a spring spring arranged on only one bearing of the winding shaft;

[0048] Figure 15 A further embodiment of a spring arranged on a bearing of a winding shaft is shown in cross section;

[0049] Figure 16 Shown in cross section as Figure 11 A further embodiment of a variation of the embodiment shown in ; and

[0050] Figure 17 A further embodiment of a vehicle roller blind arrangement is shown in a top view, which comprises a spring arranged on two bearings of a winding shaft. DETAILED DESCRIPTION

[0051] A vehicle, for example a passenger car, has a roof 1 with a transparent roof section 2, which is formed, for example, by a glass cover of a sliding roof or a fixedly mounted roof part or roof section. Below the transparent roof section 2, a vehicle roller blind device 3 is arranged, which has a roller blind web 4 for covering the transparent roof section 2. The roller blind web 4, which is made, for example, of fabric, film or the like, has a tensioning support 5 at its free front edge or extended end, which is supported movably at its two lateral ends 6 on lateral guide rails 7 extending in the longitudinal direction of the roof. The vehicle roller blind device 3 has a winding shaft 8, which is arranged in a transverse orientation on the roof 1, for example, behind the roof section 2 to be covered, and is rotatably supported by means of two end-side bearings 9 and 10. The bearings 9 and 10 are arranged, for example, on a roller blind frame 11, which is arranged on the roof 1 and can, for example, include two guide rails 7 and a transverse frame part 12 connecting the two guide rails 7 (see Figure 6 ), the transverse frame part can also constitute a guide device for the roller blind web 4. The two bearings 9 and 10 are arranged in particular in the region of the ends of the two guide rails 7 rearwardly with respect to the top longitudinal direction.

[0052] The roller blind web 4 is fixed at its rear edge or rear end to a tubular winding shaft 8 and is wound around the winding shaft 8, which is prestressed in the winding direction by spring force. Each guide rail 7 has a cable guide 13 on which a drive cable 14 is movably supported. The drive cables 14 are connected to a support slide (not shown) arranged at the lateral end 6 of the tensioning support 5, which is movably supported on the guide rail 7, and can be adjusted by a drive motor 15, such as an electric variable-speed motor, which is arranged, for example, on the roller blind frame 11. The two drive cables 14 can be used to adjust the tensioning support 5 along the two guide rails 7 to wind the roller blind web 4 onto or unwind it from the winding shaft 8, thereby adjusting the desired covering position of the roller blind web 4.

[0053] The roller blind web 4 expediently has lateral guide strips 16 at its side edges, which are guided in corresponding roller blind guides 17 (see Figure 6 ) is guided and the roller blind web 4 is held tensioned in the transverse direction.

[0054] The central shaft 18 is arranged inside the winding shaft 8 (see FIG. Figure 2), which is fixedly mounted on both sides of bearing pins 19 and 20, which protrude from the first bearing 9 or the second bearing 10 relative to each other. The rigid central shaft 18 can, in principle, be linear or curved. The winding shaft 8 is mounted about the central shaft 18 and rotatably relative to the bearing pins 19 and 20 by means of two bearing sleeves 21 and 22. The first bearing sleeve 21 is rotatably mounted on the first bearing pin 19 and is connected to the ends of the winding shaft 8 in a rotationally fixed manner. The winding shaft 8 can be designed as a rigid tube or a flexible tube, for example made of plastic, so that, in the case of a curved central shaft 18, it can elastically deform accordingly when the central shaft rotates. Figure 2 The configuration shown in with a linear central axis 18 can therefore also be configured with a curved central axis 18 , wherein in this case the bearings 9 and 10 are configured with corresponding bearing pins 19 and 20 which are at a small angle to one another.

[0055] In the case of a rigid, linear winding shaft 8 , the central shaft 18 can be omitted.

[0056] The spring support component 23 is rotatably supported on the second bearing pin 20. The spring support component 23 has a central section 24, which is configured, for example, as a plain bearing sleeve with an outer bearing surface, on which the second bearing sleeve 22 is rotatably supported. A spring unit in the form of a tensioning spring 25 is arranged in a cylindrical chamber 26 between the central shaft 18 and the winding shaft 8, surrounding the central shaft 18 with radial play. The tensioning spring 25 can, in particular, be helical or coiled and deforms elastically under torsional load. The tensioning spring 25 is connected to the first bearing sleeve 21 in a rotationally fixed manner, for example, by being fixed to the inner end face of the first bearing sleeve 21, for example, by means of a spring wire end inserted into a hole. The tensioning spring 25 is connected to the spring support component 23 in a rotationally fixed manner, with its second tensioning spring end 28 facing the second bearing sleeve 22. The spring support part 23 has an inner section 29 extending inwardly from its central section 24 and expediently having a larger diameter than the central section 24. The tensioning spring 25 is fastened with its second tensioning spring end 28 to the inner section 29 of the spring support part 23, for example suspended at a fastening point of the spring support part 23.

[0057] The spring support part 23 has a pinion 31 on its axially outer outer end 30 adjacent to the second bearing 10, which is connected to the central section 24 of the spring support part 23 in a rotationally fixed manner or is formed integrally with the central section and can rotate together with the spring support part 23 about the second bearing pin 20 and is arranged in front of or within a bearing part, for example a bearing wall 32 of the second bearing 10.

[0058] In particular, one of the two drive cables 14 of the inclined cable is coupled to the pinion 31, thereby enabling the tensioning support 5 connected to the drive cable 14 to correspond to the rotational position of the spring support member 23 through the coupling of the drive cable 14 with the pinion 31. The drive cable is guided by the drive motor 15 as it extends to the guide rail 7, on which the second bearing 10 is arranged. The adjustment device for adjusting the spring support member 23 thus comprises at least the pinion 31 and the drive cable 14 that actuates the pinion 31.

[0059] The driving cable 14 is adjusted and matched with the pinion 31 at the upper edge position of the pinion. Figure 2 The guide rail 7 (not shown) extends from the upper side of the winding shaft 8 to the tensioning support 5. Longitudinal adjustment of the tensioning support 5 along the guide rail 7 causes the winding shaft 8 to rotate due to a corresponding movement of the blind web 4. Synchronously, the drive cable 14 rotates the pinion 31 and, thereby, the spring support element 23 in a corresponding direction of rotation. The winding radius of the blind web 4 on the winding shaft 8 changes with the extended length of the blind web 4 and, therefore, with the position at which the blind web 4 is wound onto the winding shaft 8. The pinion 31 preferably has a radius that corresponds approximately to the winding radius of the blind web 4 on the winding shaft 8 when the blind web 4 is extended to half its length.

[0060] The vehicle roller blind device 3 is assembled such that the spring support component 23 is rotated relative to the winding shaft 8 in the tensioning rotational direction of the tensioning spring 25 to such an extent that the prestress of the tensioning spring 25 thus set maintains a sufficient tensile stress on the roller blind web 4. When the winding shaft 8 and the spring support component 23 rotate synchronously, the winding shaft 8 maintains a substantially constant spring prestress relative to the spring support component 23. Slight increases and decreases in the spring prestress occur due to the changing winding radius of the roller blind web 4.

[0061] As a result, a relatively long roller blind web 4 can be unwound from the winding shaft 8 with a large extension length without an excessively high spring prestressing occurring or a compression of the tensioning spring 25 occurring due to an otherwise increased spring torsion.

[0062] In the region of the second bearing 10, a fabric guide (not shown) can be provided, which is arranged, for example, in the form of a disc, from the pinion 31 inwardly toward the second bearing sleeve 22 and rests, for example, on the second bearing sleeve 22 or the spring support element 23. The fabric guide prevents the roller blind web 4 from coming into contact with the pinion 31 with its side edge and, in particular, from becoming jammed between the pinion 31 and the drive cable 14.

[0063] The bearing 10 can be regarded as a component, in principle also as a fabric positioning device, which, in addition to supporting the winding shaft 8 , also provides a connection to the guide rail 7 and an input region for the roller blind web into the guide rail 7 .

[0064] A second embodiment of the vehicle roller blind device 3 (see Figure 3 ) is modified from the first embodiment described above in that the adjustment device for the spring support part 23 includes a transmission 33 having a drive pinion 34 and an output pinion 35, which are arranged in a rotationally fixed manner on a common shaft 36. The shaft 36 is rotatably mounted on a bearing wall 32. The output pinion 35 is arranged on the inside, next to the bearing wall 32, facing the winding shaft 8, and meshes with the pinion 31 of the spring support part 23. The drive pinion 34 is arranged on the outside next to the bearing wall 32 and, on its circumference, is in adjustment engagement with the drive cable 14, which, for example, is in adjustment engagement with the top side of the drive pinion 34.

[0065] The adjustment of the spring support member 23 relative to the winding shaft 8 can be adjusted by selecting and determining the corresponding diameters of the pinion 31 of the spring support member 23 and the drive pinion 34 and the driven pinion 35. Figure 3 ) and the drive pinion 34 has a first embodiment ( Figure 2 ), the same properties as in the first embodiment are achieved with respect to the spring prestressing. Since the transmission 33 causes a reversal of the direction of rotation of the adjustment movement initiated by the drive cable 14, the roller blind web 4 must rest on the underside of the winding shaft 8 and be unwound from it (at the top of the drive cable 14 on the drive pinion 34). Figure 3 ) or the drive cable 14 must be adjusted into engagement with the underside of the drive pinion 34 .

[0066] With the pinion diameters thus selected differently, for example, an increasing or decreasing spring characteristic curve of the tensioning spring 25 can be set.

[0067] In principle, the output section of the drive cable 14 can also be adjusted to the pinion 31 or to the gear mechanism 33 .

[0068] The arrangement of the drive pinion 34 on the outside of the bearing 10 or next to the bearing wall 32 can be advantageous in the case of narrow installation space ratios.

[0069] A third embodiment of the vehicle roller blind device 3 (see Figure 4) is modified from the previous embodiment as follows: the second bearing 10 has an extended bearing sleeve 37 instead of the bearing pin 20. The spring support component 23 extends through the bearing sleeve 37 with a central bearing section 38, which also rotatably supports the pinion shaft 31. The bearing sleeve rotatably supports the central bearing section 38. A sliding bearing pin 39 projects from the inner section 29 of the spring support component 23 to the central shaft 18 and is slidingly supported in a cylindrical bearing recess 40 of the central shaft 18. The central shaft 18 is thus arranged in a rotationally fixed manner only on the first bearing 9 by the first bearing pin 19, while the central shaft is held at its opposite end by the spring support component 23 without being fixed in a rotationally fixed manner. The second bearing sleeve 22 of the winding shaft 8 is rotatably supported on the fixed bearing sleeve 37.

[0070] The pinion 31 is arranged on the bearing section 38 or outside the pinion shaft next to the bearing wall 32 and is in adjustment engagement with the drive cable 14 on its circumference, which is, for example, in adjustment engagement with the upper side of the pinion 31 .

[0071] A fourth embodiment of the vehicle roller blind device 3 (see Figure 5 ) Compared to the aforementioned third embodiment, the second bearing 10 has a relatively short bearing sleeve 41 in the area of ​​the bearing wall 32. The spring support element 23 extends through the short bearing sleeve 41 with a correspondingly short bearing section 42, which is part of the pinion shaft, and is slidingly supported therein. The second bearing sleeve 22 of the winding shaft 8 is rotatably supported on the central bearing section 43 of the spring support element 23, which has a larger diameter than the short bearing section 42. The pinion 31 is mounted in a rotationally fixed manner on the pinion shaft, or on the pinion shaft, on the pinion-shaped protruding bearing section 42 of the spring support element 23.

[0072] exist Figure 4 and 5 In the embodiment shown in FIG, the bearing wall 32 forms in particular a lateral limit for the centered winding of the roller blind web 4 onto the winding shaft 8 .

[0073] The fifth embodiment of the vehicle roller blind device 3 (see Figure 6 and 7 ) In principle, Figure 4, but has a gear mechanism 33 on the second bearing 10, which is arranged outside the bearing wall 32 and comprises a drive pinion 34 and an output pinion 35, which are supported in a rotationally fixed manner on a common shaft 36. The drive cable 14 is in adjustment engagement with the drive pinion 34, and the output pinion 35 meshes with the pinion 31, which is connected in a rotationally fixed manner to a bearing section 38 of the spring support part 23.

[0074] The sixth embodiment of the vehicle roller blind device 3 (see Figure 8 ) In principle, Figure 3 , wherein, however, the bearing pin 20 is fixedly connected to the bearing 10 with a bearing pin extension 20', which extends coaxially with the bearing pin 20 and is fixedly connected to the fixed central shaft 18, which is designed as a tube, for example. A spring support element 23, which is designed to be essentially tubular or sleeve-shaped, is supported on the bearing pin 20 and the bearing pin extension 20' in a sliding and rotatable manner. The bearing sleeve 22, which is connected to the winding shaft 8, is supported in a rotatable manner on the spring support element 23. An annular pinion 31, which is connected to the spring support element 23 in a rotationally fixed manner, directly adjoins the bearing wall 32 on the inside and, as shown, can be partially arranged in an associated annular groove 44. A transmission 33 is provided, whose drive pinion 34 is arranged on a shaft 36 in a rotationally fixed manner outside the bearing wall 32, and whose output pinion 35 is arranged on a shaft 36 in a rotationally fixed manner inside the bearing wall 32 and meshes with the pinion 31, which is connected in a rotationally fixed manner to the spring support part 23.

[0075] The arrangement of the transmission 33 on the bearing 10 can thus be realized in various configurations and can be adapted in particular to the existing installation space.

[0076] The following Figures 9 to 17 The embodiment shown in FIG. 1 replaces the helical or coiled tensioning spring 25 (see FIG. Figures 2 to 5 ) A spring unit in the form of a spring or coil spring 45 is preferably contained within the hollow winding shaft 8, which is relatively narrow in the axial direction. The spring or coil spring 45 expediently has a coil consisting of a spring strip 46 (see Figure 10 ), the spring strip is configured, for example, at its inner end 47 as an inner suspension part for connecting to a first component and at its outer end 48 as an outer suspension part for connecting to a second component that can rotate relative to the first component. The winding spring or coil spring 45 can be received in a housing 49 (see Figure 11), the housing is, for example, a second component, the outer hanging portion of the spring strip 46 is fixed to the second component, and the housing has a central hole, for example, a shaft or pinion shaft as the first component passes through the central hole, and the inner end 47 of the spring strip 46 is fixed to the shaft or pinion shaft together with the inner hanging portion of the spring strip.

[0077] In the vehicle roller blind device 3 Figure 9 In the embodiment shown in , the bearing 10 has a bearing pin 50, on which a bearing sleeve 51 of a winding shaft (not shown) is rotatably supported. A rigid and, for example, tubular winding shaft realizes the connection between the two bearings 9 and 10. An internal rigid shaft is therefore not required and can be omitted. The pinion 31 is connected to the pinion shaft 52 in a rotationally fixed manner or is manufactured in one piece. The pinion shaft 52 is rotatably supported in a bearing hole in the center of the bearing 10 and coaxial with the bearing pin 50, and the pinion 31 is held outside the bearing 10 or next to the bearing wall 32 and in contact with the drive cable 14. The pinion shaft 52 extends from the bearing pin 50 into the inner space of the bearing sleeve 51. The spring or coil spring 45 is provided as a driven spring unit (see according to Figure 10 (as previously described), the spring or coil spring is received in a bearing sleeve 51 adjacent to the bearing pin 50. The inner end 47 of the preloaded spring or coil spring 45 is connected to the pinion shaft 52 in a rotationally fixed manner, for example, by means of a receptacle that is internally suspended on the pinion shaft 52. The outer end 48 of the spring or coil spring 45 is fixed to the inside of the bearing sleeve 51 in a rotationally fixed manner, for example, by means of a retaining element that is suspended on the bearing sleeve 51. The winding shaft is also rotatably supported on the bearing 9 at its opposite end (not shown) by means of the bearing sleeve. Alternatively, the spring or coil spring 45 can be arranged on the bearing 9 as a driven spring unit, which is actuated synchronously with the first spring unit or spring or coil spring 45 via a second drive cable. In this embodiment, the pinion shaft 52 thus forms the spring support element 23, and the pinion 31 is part of the adjustment mechanism for the spring support element 23.

[0078] In a further embodiment of the vehicle roller blind arrangement 3 (see Figure 11), the bearing 10 has a bearing bore as a sliding bearing for a winding support shaft 53 of the winding shaft 8. The winding support shaft 53 protrudes outward from the bearing 10 and forms a sliding bearing for the pinion 31, which is arranged adjacent to the bearing 10. A spring or coil spring 45 is arranged on the winding support shaft 53 next to the pinion 31 and surrounds the winding support shaft 53. The inner end 47 of the spring or coil spring 45 is fixed to the winding support shaft 53. The outer end 48 of the spring or coil spring 45 is fixed to a cylindrical housing 49, in which the spring or coil spring 45 is received and rotatably supported on the winding support shaft 53 via an axial bore. The housing 49 is coupled to the pinion 31 in a rotationally fixed manner, for example, via a housing side wall 54. The free end of the winding support shaft 53 has an axial limiter, such as a stop plate 55, which holds the housing 49 of the winding spring or coil spring 45 in a manner protected against axial displacement. The stop plate 55 is arranged upstream of a shaft end stop 56. The winding spring or coil spring 45 is preloaded between the pinion 31 and the winding shaft 8. When the roller blind web 4 is unwound from the winding shaft 8, the drive cable 14 synchronously pivots the pinion 31 relative to the winding shaft 8 and the winding support shaft 53. The housing 49 of the winding spring or coil spring 45 is thus at least a component of the spring support element 23.

[0079] A further embodiment of the vehicle roller blind device 3 (see Figure 12 ) Compared to the aforementioned embodiment ( Figure 11 ) is modified as follows: the bearing 10 includes a bearing sleeve 57 that extends axially outward and on which the pinion 31 is rotatably supported. The winding shaft 8 is rotatably supported in the bearing sleeve 57 with its winding support shaft 53. A housing 49 with a spring or coil spring 45 is arranged on the winding support shaft 53 extending from the bearing sleeve 57. The spring or coil spring 45 is connected to the pinion 31 in a rotationally fixed manner via the housing 49 on the one hand and to the winding support shaft 53 on the other hand. Here, the housing 49 is also coupled to the pinion 31 in a rotationally fixed manner, for example, via a housing side wall 54.

[0080] Figure 13 Shows the corresponding Figure 1 The roller blind device 3 has two bearings 9 and 10 for a winding shaft 8, each of which has a corresponding Figures 9 to 12 A tensioning spring in the form of a spring or coil spring 45 with the aforementioned spring support part 23 and an adjusting device, each containing a drive cable 14. The winding shaft 8 is straight and torsion-proof.

[0081] Figure 14 Shown relative to Figure 13A modified roller blind device in which only one bearing of the winding shaft 8, for example the second bearing 10, has a tensioning spring or a spring spring or a coil spring 45 with a spring adjustment mechanism, while the other bearing, the first bearing 9, is designed as a passive bearing without a spring and therefore also without a spring adjustment mechanism. The drive cable 14 assigned to the first bearing 9 has no adjustment engagement with this bearing 9.

[0082] Figure 15 The modified embodiment shown in FIG includes a bearing 10 in which a bearing pin 58 of the winding shaft 8 is rotatably supported. The pinion shaft 52 is rotatably supported in a bore 59 of the bearing pin 58 and in a further bearing portion 10' of the bearing 10. A spring or coil spring 45 is arranged coaxially with the pinion shaft 52 between the bearing portion 10' and the bearing 10. The housing 49 of the spring or coil spring is fixedly or non-rotatably connected to the bearing pin 58, and the spring or coil spring 45 is non-rotatably connected to the pinion shaft 52. The pinion 31, fixedly mounted on the pinion shaft 52, is arranged between the spring or coil spring 45 and the further bearing portion 10'. The function of the spring adjustment device is identical to that of the other exemplary embodiments.

[0083] Figure 16 A further embodiment is shown, in which the bearing 10 has a bearing pin 20 connected to a flexurally rigid shaft 18 . A bearing sleeve 22 of the winding shaft 8 is rotatably mounted on the bearing pin 20 . A spring or coil spring 45 is arranged adjacent to the bearing wall 32 on the bearing sleeve 22 , for example, on a projection 60 of the bearing sleeve 22 . The inner end 47 of the spring or coil spring 45 is fixed to the bearing sleeve 22 . The outer end 48 of the spring or coil spring 45 is fixed to a housing 49 of the spring or coil spring, on the circumference of which the pinion 31 is fixedly mounted. The housing 49 thus forms the spring support component 23 and is adjusted by the drive cable 14 via the pinion 31 . The tensioning spring in the form of a spring or coil spring 45 is thus tensioned between the bearing sleeve 22 of the winding shaft 8 and the spring support part 23 or housing 49 , which is rotatably mounted coaxially with the bearing sleeve 22 of the winding shaft 8 .

[0084] Figure 17 Show Figure 13, a variation of the vehicle roller blind device 3 is shown in FIG. In this variant, a tensioning spring or spring spring or coil spring 45 is also provided on each of the two bearings 9 and 10. However, the winding shaft 8 is not a fixed, torsionally fixed shaft, but is, for example, formed as a foam core or a cylindrical rod made of plastic foam, such as polystyrene. In this arrangement, the winding shaft can also be held in a flexed manner by the two bearings 9 and 10. The winding shaft can also have only two lateral bearing sleeves or bearing pins and can be formed with multiple windings of roller blind web or roller blind material between them. Since this winding shaft is not sufficiently torsionally fixed, a tensioning spring arranged on both sides in this embodiment is preferred.

[0085] Reference Signs List

[0086] 1 Roof

[0087] 2 Top section

[0088] 3 Vehicle roller shutter device

[0089] 4 Roller blinds

[0090] 5. Stretch bracket

[0091] 6 ends

[0092] 7 rails

[0093] 8 Winding shaft

[0094] 9 bearings

[0095] 10 bearings

[0096] 10' bearing section

[0097] 11 Roller shutter frame

[0098] 12 Horizontal frame part

[0099] 13 Cable guide

[0100] 14 Drive cable

[0101] 15 drive motor

[0102] 16 guide belt

[0103] 17 Roller blind guide

[0104] 18 axes

[0105] 19 bearing pin

[0106] 20 bearing pin

[0107] 20' bearing pin extension

[0108] 21 bearing sleeve

[0109] 22 bearing sleeve

[0110] 23 Spring support component

[0111] 24 Central section

[0112] 25 tension spring

[0113] 26 Cylindrical cavity

[0114] 27 End of the first tensioning spring

[0115] 28 Second tensioning spring end

[0116] 29 internal sections

[0117] 30 outer end

[0118] 31 small gear

[0119] 32 bearing wall

[0120] 33 Transmission

[0121] 34 drive pinion

[0122] 35 driven pinion

[0123] 36 axes

[0124] 37 bearing sleeve

[0125] 38 Support section

[0126] 39 Sliding bearing pin

[0127] 40 Support recess

[0128] 41 Short bearing sleeve

[0129] 42 Short support section

[0130] 43 Center support section

[0131] 44 slots

[0132] 45 Spring or coil spring

[0133] 46 Spring Slats

[0134] 47 inner end

[0135] 48 outer end

[0136] 49 shell

[0137] 50 bearing pin

[0138] 51 bearing sleeve

[0139] 52 pinion shaft

[0140] 53 Winding support shaft

[0141] 54 Shell side wall

[0142] 55 limit piece

[0143] 56 Shaft end stop

[0144] 57 bearing sleeve

[0145] 58 bearing pin

[0146] 59 holes

[0147] 60 bulge.

Claims

1. A vehicle roller blind device (3), comprising: a roller blind web (4), which is wound on a winding shaft (8) which is rotatably supported and prestressed in a winding direction by means of a tensioning spring (25); and a stretching bracket (5), which is connected to the extension end of the roller blind web (4) and is movably supported on both sides on guide rails (7), and in order to wind the roller blind web (4) onto the winding shaft (8) or unwind it from the winding shaft, the stretching bracket can be adjusted along the guide rails (7), wherein: The first bearing (9) and the second bearing (10) receive and rotatably support the winding shaft (8) therebetween, wherein the tensioning spring (25, 45) is tensioned between the winding shaft (8) and a spring support component (23) rotatably supported coaxially with the winding shaft (8), wherein an adjusting device adjusts the spring support component (23) relative to the winding shaft (8) to set a spring prestressing force that matches the extension length of the roller blind web (4), and the first bearing (9) has a first axis. The invention relates to a bearing pin (19), wherein the first bearing pin rotatably supports the first bearing sleeve (21) of the winding shaft (8), and the central axis (18) of the winding shaft (8) is non-rotatably arranged on the first bearing pin at its first end, characterized in that the second bearing (10) rotatably supports the spring support component (23) relative to the fixed central axis (18) and the winding shaft (8), and the winding shaft (8) is rotatably supported on the second bearing (10) via the spring support component (23).

2. The vehicle roller blind device (3) according to claim 1, characterized in that: In order to maintain the spring prestressing force set in the wound roller blind web (4), the adjusting device rotates the spring support component (23) along the rotation direction of the winding shaft (8) when unwinding the roller blind web (4).

3. The vehicle roller blind device (3) according to claim 1 or 2, characterized in that: The adjusting device comprises: an electric motor which drives the spring support part (23) or forms or contains the spring support part (23), or a drivable drive wheel or pinion (31) which is arranged coaxially with the spring support part (23) and is connected to the spring support part in a rotationally fixed manner.

4. The vehicle roller blind device (3) according to claim 3, characterized in that: The pinion (31) is in adjustable cooperation with a drive cable (14), and the drive cable is connected to the tensioning bracket (5) and is adjustable.

5. The vehicle roller blind device (3) according to claim 4, characterized in that: The spring support element (23) or the pinion (31) is coupled to the drive cable (14) via a gear mechanism (33) and can be rotationally adjusted by the drive cable.

6. The vehicle roller blind device according to claim 1 or 2, characterized in that: - the tensioning spring (25, 45) is arranged inside the winding shaft (8), or - the tensioning spring (45) is arranged outside the winding shaft (8) on a bearing (10) that supports the spring support part (23).

7. The vehicle roller blind device (3) according to claim 6, characterized in that: The two bearings (9, 10) each have a tensioning spring (45) with a spring support element (23) adjustable by the adjusting device, which is arranged inside or outside the winding shaft (8).

8. The vehicle roller blind device (3) according to claim 3, characterized in that: The second bearing (10) has a bearing sleeve (37), and the spring support component (23) is rotatably supported in the bearing sleeve, wherein the pinion (31) of the spring support component (23) is arranged axially outside the bearing sleeve (37) of the second bearing (10), and the spring support component (23) is rotatably supported on the central shaft (18) on the axial inside by means of a sliding bearing.

9. The vehicle roller blind device (3) according to claim 8, characterized in that: The spring support component (23) has a central bearing section (38), wherein: - the second sliding bearing sleeve (22) of the winding shaft (8) is rotatably supported on the central bearing section (38), or - the central bearing section (38) is slidingly supported in the bearing sleeve (37) of the second bearing (10), and the second sliding bearing sleeve (22) of the winding shaft (8) is slidingly supported on the bearing sleeve (37) of the second bearing (10).

10. The vehicle roller blind device (3) according to claim 3, characterized in that: The second bearing (10) has a fixed bearing pin (20) which extends to the central shaft (18) and is fixedly connected to the central shaft, wherein the spring support part (23) is rotatably supported on the bearing pin (20) and the second sliding bearing sleeve (22) of the winding shaft (8) is rotatably supported on a central section (24) of the spring support part (23).

11. The vehicle roller blind device (3) according to claim 10, characterized in that: The drive wheel or pinion (31) of the spring support member (23) is arranged on the bearing pin (20) of the second bearing (10).

12. The vehicle roller blind device (3) according to claim 10 or 11, characterized in that: The pinion (31) of the spring support part (23) is arranged on the bearing pin (20) and meshes with a driven pinion (35), which is rotatably supported on the bearing wall (32) of the second bearing (10) by means of a shaft (36), wherein the shaft (36) carries the drivable pinion outside the bearing wall (32).

13. The vehicle roller blind device (3) according to claim 3, characterized in that The tensioning spring is received in a housing (49), which is the spring support component (23) and is connected to the drive wheel or pinion (31) in a rotationally fixed manner.

14. The vehicle roller blind device (3) according to claim 1, characterized in that The stretching support can be adjusted along the guide rail (7) by means of a drive.

15. The vehicle roller blind device (3) according to claim 4, characterized in that The drive cable can be adjusted by a drive motor (15).

16. The vehicle roller blind device (3) according to claim 13, characterized in that The tensioning spring comprises a clockwork spring or a coil spring.

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