Sunshade roller blind for one vehicle window

Abstract

Sunshade roller blind (1) for a vehicle window, comprising - a curtain (2) designed to at least partially cover the vehicle window when rolled up, - a winding shaft (3) to which a first section (21) of the curtain (2) is attached in such a way that the curtain (2) can be rolled up and down on the winding shaft (3), - an extension element (4) to which a second section (22) of the curtain (2) is attached and the extension element (4) is designed to hold the curtain (2) in a state that is at least partially rolled out, - a winding element (5) which is arranged on the winding shaft (3), wherein the winding element (5) has a first winding track (51) and a second winding track (52) which are spaced apart from each other by means of a separating element (53), and - a pull element (6), ◯ which can be rolled up onto the winding element (5), ◯ which is attached with a first end (61) to a first side (41) of the extension element (4), ◯ which is attached with a second end (62) to a second side (42) of the extension element (4), ◯ which is guided from the first side (41) of the pull-out element (4) via the first and second winding track (51, 52) to the second side (42) of the pull-out element (4), ◯ wherein the pulling element (6) is arranged in a state unwound from the winding element (5) in such a way that a compensating movement (A) between the first and second winding track (51, 52) is possible for the parallel alignment of the pulling element (4) and the winding shaft (3).

Description

Technical field

[0001] The present invention relates to a sunshade roller blind for a vehicle window. State of the art

[0002] Modern vehicle body designs are characterized by relatively large window areas. These large window areas can lead to significant heating of the vehicle interior when exposed to sunlight. Therefore, motor vehicles are increasingly being equipped with shading systems. Various concepts for shading vehicle windows are known from the current state of the art; in particular, roller blinds are widespread.

[0003] These types of sunshade roller blinds have a fabric that can be rolled up and down a winding shaft. The fabric is preferably rectangular and attached to the winding shaft with one section and to a pull-out element with a second, preferably opposite, section. In a state that is at least partially unrolled, where the fabric at least partially covers the vehicle window, the winding shaft and pull-out element are ideally arranged parallel to each other. The fabric is usually rolled up and down by a cable system with one cable on each side. However, if the cables are of different lengths, the pull-out element can become misaligned when the fabric is unrolled. The main challenge, therefore, is configuring the two cables so that the sunshade roller blind assumes the desired position when unrolled and does not stand at an angle.

[0004] DE 10 2015 106 527 A1 describes a roller blind for shading a vehicle window, comprising a fabric roller and a bracket to which the fabric roller is rotatably connected. Furthermore, a guide rail, which is connected at one end to the bracket, a drop bar guided in the guide rail, and a fabric which is fixed on one side to the fabric roller and on the other side to the drop bar and can be wound up onto the fabric roller are provided. The guide rail is foldable relative to the bracket in the direction of the fabric roller. Description of the invention

[0005] One object of the invention is therefore to provide a sunshade roller blind for a vehicle window using the simplest possible means of construction, which has a simple and cost-effective design and assumes the desired position when rolled up, in which, in particular, the winding shaft and the extension element are arranged parallel to each other.

[0006] The problem is solved by the subject matter of the independent claims. Advantageous embodiments of the invention are specified in the dependent claims, the description, and the accompanying figures.

[0007] A sunshade roller blind according to the invention for a vehicle window comprises a fabric designed to at least partially cover the vehicle window when unrolled. The sunshade roller blind further comprises a winding shaft to which a first section of the fabric is attached such that the fabric can be rolled up and down on the winding shaft. The sunshade roller blind includes a pull-out element to which a second section of the fabric is attached. The pull-out element is designed to hold the fabric in a partially unrolled state. The sunshade roller blind also includes a winding element arranged on the winding shaft. The winding element has a first winding track and a second winding track, which are spaced apart from each other by means of a separating element.The sunshade roller blind comprises a pull element that can be wound onto the winding element. One end of the pull element is attached to the first side of the extension element, and the other end is attached to the second side of the extension element. From the first side of the extension element, the pull element extends over the first and second winding tracks to the second side of the extension element. When unwound from the winding element, the pull element is movably arranged to allow for compensatory movement between the first and second winding tracks, ensuring parallel alignment of the extension element and the winding shaft.

[0008] The sunshade roller blind is designed for installation in a vehicle, particularly a car or truck. When installed, the sunshade roller blind is not visible when the fabric is completely rolled up onto the roller tube. It is typically located behind the vehicle's door panel. When unrolled, i.e., when the fabric is unwound from the roller tube, it partially or completely covers a window of the vehicle.

[0009] The sunshade roller blind, in particular the fabric, is preferably rectangular and flat. The fabric is flexible, i.e., not rigid, so that it can be rolled up and down. The fabric can, for example, be made of a textile. Typically, the winding shaft is attached to one side of the fabric, and the extension mechanism is attached to the opposite side, preferably parallel to it. This parallel arrangement facilitates rolling up and down the fabric. Along the other two sides, a guide rail is usually arranged between the winding shaft and the extension mechanism when the fabric is unrolled.

[0010] The first section of the curtain, i.e., one side or edge of the curtain, is fixedly mounted on a winding device, in particular on the winding shaft. The winding shaft is rotatably mounted and has an axis of rotation. The winding shaft rotates about this axis in the direction of rotation. The first section of the curtain is arranged along this axis of rotation. The winding shaft can be rotationally symmetrical, in particular tubular. The winding shaft can be driven by a motor. This design allows for easy winding and unwinding of the curtain.

[0011] The second section of the blind, which is also a side or edge, is fixed to the extension mechanism. The first and second sections of the blind are positioned opposite each other. This arrangement facilitates raising and lowering the blind.

[0012] The winding element is designed such that the tension element can be wound onto or unwound from the winding element. Preferably, the winding element is rotationally symmetrical. The winding element is rotatably mounted. The separating element is arranged on the winding element such that a gap is formed between the first winding track and the second winding track. This gap is typically between 0.8 and 1.2 mm, particularly 1 mm. This gap separates the first and second winding tracks, allowing the tension element to be wound onto the first or second winding track without accidentally moving between them.

[0013] The tension element can be wound onto the winding element, in particular onto the first and second winding tracks. The winding tracks have a width between 0.8 and 1.2 mm, particularly 1 mm. During winding, the tension element can be arranged side by side in the respective winding track. However, it is preferred that the tension element be arranged one above the other during winding. This allows the winding tracks to be narrower and thus more space-saving. The tension element is preferably designed as a single, continuous, elongated, and flexible element. The first end of the tension element is fixedly attached to the first side of the extension element, and the second end of the tension element is fixedly attached to the second side of the extension element. The tension element is only fixedly attached at these two points.

[0014] The pulling element is guided or directed from the first side of the extension element, in particular along one of the guide rails and especially via at least one deflection element, to the first winding track. From the first winding track, the pulling element is guided, in particular via the separating element, to the second winding track. The pulling element is arranged such that its direction changes by approximately 180° at the separating element, i.e., at the transition from the first to the second winding track. This means that the pulling element runs in one direction in the first winding track and in the opposite direction in the second winding track. From the second winding track, the pulling element is guided, in particular along the other of the guide rails and especially via at least one further deflection element, to the second side of the extension element.

[0015] When the pull element is completely unwound from the winding element, the curtain is completely wound onto the winding shaft, and vice versa. In the fully unwound state, the pull element is movable relative to the first and second winding tracks and, in particular, to the separating element. The pull element can move a small distance, approximately up to 8 mm, between the first and second winding tracks. Thus, movement of the pull element can occur in the area of ​​the separating element. This movement of the pull element is transmitted to the first and second ends of the pull element and therefore to the first and second sides of the extension element. The first and second sides are located at opposite ends of the extension element, preferably near the guide rails. This allows for a compensating movement that aligns or positions the extension element parallel to the winding shaft.

[0016] The advantage of this solution is that two separate pull rods are not required. Instead, a single pull rod, when fully extended, aligns the extension arm and thus the top of the blind into the desired position parallel to the winding shaft. This adjustment occurs every time the blind is fully retracted and rolled up. The blind is therefore always extended and unrolled in the correct position, preventing any misalignment of the extension rod. Deviations in the extended position are avoided, resulting in a longer lifespan for the blind. Even after many years, this design ensures flawless operation. Because only one pull rod is needed, the complex adjustment of length tolerances required for two separate pull rods is eliminated. Furthermore, only a single winding mechanism is required.This is a relatively inexpensive solution.

[0017] One possible embodiment of the invention provides that the separating element is designed as a wall that rotates around the perimeter. This wall forms the gap between the first and second winding tracks. This wall extends up to 10 mm from the base surface of the winding tracks. Furthermore, in a preferred embodiment, the separating element has a recess into which the tensioning element is movably suspended. The recess is preferably designed as a groove and extends from the outer surface of the wall towards the base surface, in particular to the base surface. The recess is designed such that the tensioning element can be movably arranged within it. Therefore, the thickness of the recess must be greater than the thickness of the tensioning element. This mobility is important because it enables compensatory movement. The tensioning element is suspended in the recess.This means that the pulling element cannot easily detach itself from the recess.

[0018] The advantage of this design is that the pulling element is guided simply and safely.

[0019] It is also possible that the separating element is simply designed as a hook into which the tensioning element is movably suspended. This is a particularly simple design of a separating element.

[0020] A further embodiment of the invention provides that the tension element is fixed by being wound onto the winding element. The compensating movement for aligning the pull-out element should only be possible when the tension element has been completely or almost completely unwound from the winding element. As soon as the tension element is wound onto the winding element, it is tensioned by the separating element, in particular by the arrangement of the tension element in the recess. As soon as the winding element has completed one revolution in the direction of rotation, the tension element is fixed in such a way that it can no longer move between the first and second winding tracks.

[0021] The advantage of this design is that the pull element is fixed in a simple way, thus ensuring that the correct position of the pull bar is maintained when the sunshade roller blind is unrolled.

[0022] According to a preferred embodiment, the first and second winding tracks are each designed as a circumferential groove and are arranged essentially parallel to each other in the direction of rotation of the winding shaft.

[0023] An advantage of this design is that the pulling element can be guided well in the grooves, thus ensuring trouble-free rolling of the pulling element onto and off the winding element.

[0024] One possible design of the sunshade roller blind provides that the first and second winding tracks are each dimensioned such that they can accommodate several turns of the pull element when it is rolled up. The turns can be arranged side by side in the respective winding track. However, it is preferred that the turns are arranged one above the other.

[0025] The advantage of this design is that the size ratio between the tensioning element and the winding channels is dimensioned so that the tensioning element has ample space during winding. However, the winding channels should not be too large, as this would prevent smooth winding. During winding, the tensioning element is secured by the multiple turns.

[0026] In another embodiment, the winding element is fixedly attached to one end of the winding shaft. The winding element can be attached entirely to one end of the winding shaft or very close to one end. The winding element is permanently connected to the winding shaft. The winding element is attached to the winding shaft in such a way that when the curtain is unwound from the winding shaft, the pull element is simultaneously wound onto the winding element, and vice versa.

[0027] The advantage of this design is that the winding element rotates with the winding shaft during winding and unwinding, thus ensuring smooth operation. The placement at one end is a structurally simple solution.

[0028] According to one embodiment, the tension element is designed as a rope. The tension element is elongated, thin, and flexible. Furthermore, the tension element is preferably formed in one piece, or at least continuous or through-the-loop. A rope made of, for example, ultra-high-molecular-weight polyethylene (UHMWPE, known, for example, as Dyneema) is particularly suitable.

[0029] A rope is inexpensive and well suited for the functionality of the sunshade roller blind.

[0030] In another embodiment, the winding shaft and the pull-out element are arranged on opposite sides of the curtain.

[0031] This ensures easy positioning of the pull-out element relative to the winding shaft through the compensating movement.

[0032] According to one embodiment, the extension element extends essentially over the entire length of the second section of the curtain and is, at least essentially, rigid. Rigid means stiff, i.e., not flexible. The extension element has an elongated shape and can be designed as a bracket.

[0033] The advantage of this design is that it ensures easy raising and lowering of the sunshade roller blind.

[0034] In a preferred embodiment, a first and a second guide rail are provided for guiding the pull element. When the curtain is unrolled, these guide rails are arranged essentially parallel to each other on the sides of the curtain between the winding shaft and the extension element. The guide rails and the curtain are not rigidly connected. For a rectangular curtain, the guide rails are preferably arranged parallel to each other on two opposite sides, guiding the pull element. A deflection element, such as a pulley, can be provided at the top and bottom of each guide rail to guide the pull element. The extension element or the winding shaft is attached to the two sides of the curtain where there are no guide rails.

[0035] This ensures that the pull element is guided securely and that the sunshade roller blind functions smoothly. Brief character description

[0036] An advantageous embodiment of the invention is explained below with reference to the accompanying figures. These show: Fig. 1. Schematic view of a state-of-the-art sunshade roller blind, Fig. 2a in schematic view a sunshade roller blind with rolled-up fabric, Fig. 2b in schematic view a winding element with unwound pulling element, Fig. 3a in schematic view a sunshade roller blind with unrolled fabric, Fig. 3b in schematic view a winding element with a rolled-up tension element.

[0037] The figures are merely schematic representations and serve only to illustrate the invention. Identical or equivalent elements are consistently identified by the same reference numerals.

[0038] Fig. Figure 1 shows a state-of-the-art sun protection roller blind with two pull elements and two winding elements, each arranged on the side of the blind.

[0039] Fig. Figure 2a shows a sunshade roller blind 1 according to the invention. The illustrated embodiment shows the sunshade roller blind 1 in a rolled-up state, in which it does not cover a vehicle window. The dashed line G schematically represents the transition from the door trim of a vehicle to the window pane. This means that in the figure, the door trim is located below line G and the window pane is located above line G.

[0040] The sunshade roller blind 1 comprises a curtain 2, a winding shaft 3 and an extension element 4. A first section 21 (not in Fig. 2 visible) of the blind 2 is attached to the winding shaft 3, a second section 22 of the blind is attached to the extension element 4. Furthermore, the sunshade roller blind 1 includes a winding element 5, which is attached to one end of the winding shaft 3. The winding element 5 is shown in detail view D1 in Fig. 2b is shown in more detail. The sunshade roller blind 1 also has a first guide rail 71 and a second guide rail 72.

[0041] The sunshade roller blind 1, or in particular its fabric 2, is rectangular in shape. The winding shaft 3 and the extension element 4 are attached, in particular parallel to each other, to opposite sides of the fabric 2. The first and second guide rails 71, 72 are arranged, in particular parallel to each other, on the two other opposite sides of the fabric 2 when it is unrolled.

[0042] The sunshade roller blind 1 also includes a pull element 6, which can be wound onto the winding element 5. The pull element 6, in this embodiment a continuous rope, is attached at a first end 61 to a first side 41 of the extension element 4 and at a second end 62 to a second side 42 of the extension element 4. The extension element 4 is elongated, and the first and second sides 41 and 42, respectively, form the ends of the extension element. The pull element 6 is guided from the first side 41 of the extension element 4 via the first guide rail 71 to the winding element 5 and then via the second guide rail 72 to the second side 42 of the extension element 4. To ensure the correct guidance of the pull element 6, deflection elements are required, which are not shown in the figure.

[0043] The sunshade roller blind 1 or its covering 2 is in accordance with Fig. 2a is completely wound onto the winding shaft 3, i.e., as far as possible or intended. This means that the tension element 6 is simultaneously completely unwound from the winding element 5. The reverse is also true. In the state of being completely unwound from the winding element 5, the tension element 6 is movably arranged on the winding shaft 5. The movement of the tension element 6 relative to the winding shaft 5 is transmitted via the first and second ends 61, 62 of the tension element 6 to the first and second sides 41, 42 of the extension element 4. The first and second sides 41, 42 are arranged at opposite ends of the elongated extension element 4. If the extension element 4 is misaligned relative to the winding shaft 3, a compensating movement of the tension element 6 can occur, which realigns or positions the extension element 4 parallel to the winding shaft 3 as desired.

[0044] In Fig. 2a indicates the direction of rotation R. In a view according to Fig. 2a from the left onto the winding shaft 3 or its axis of rotation, the direction of rotation R is clockwise. If the winding shaft 3 were to be wound according to the exemplary embodiment according to Fig. If 2a were rotated in the direction of rotation R, the curtain 2 would simultaneously unwind from the winding shaft 3 and the pulling element 6 would wind onto the winding element 5.

[0045] Fig. 2b shows the detailed view D1 from Fig. 2a. The winding element 5 is fixedly connected to the winding shaft 3 and rotates with it in the direction of rotation R. The winding element 5 has a first winding track 51 and a second winding track 52. The first and second winding tracks 51, 52 are each designed as a circumferential groove and are arranged parallel to each other in the direction of rotation R of the winding shaft 3.

[0046] A separating element 53 is arranged between the two winding tracks 51, 52. The separating element 53 is designed as a wall extending around the winding track in the direction of rotation R. This wall forms the gap between the first and second winding tracks 51, 52. The separating element 53 extends from a base surface 55 of the winding tracks 51, 52. The separating element 53 also has a recess 54. The recess 54 is designed as a groove and extends from an outer surface 56 of the separating element 53 to the base surface 55 of the winding tracks 51, 52, i.e., in the direction of the axis of rotation.

[0047] The tension element 6 is movably arranged in the recess 54, i.e., movable relative to the separating element 53 and the winding tracks 51, 52. The tension element 6 is suspended in the recess 54. Sufficient tension is maintained on the tension element 6 to keep it in the recess 54 and prevent it from coming loose. The tension element 6 is guided from the first guide rail 71 into the first winding track 51. From there, the tension element 6 is guided into the recess 54 of the separating element 53 and then into the second winding track 52. In doing so, the tension element 6 is deflected by 180°. This means that the tension element 6 runs in one direction in the first winding track 51 and in the opposite direction in the second winding track 52. From the second winding track 52, the tension element 6 is guided to the second guide rail 72.

[0048] Since the pulling element 6 is movably arranged in the state described above when the winding element 5 has completely unwound, a compensating movement A of the pulling element 6 is enabled between the first and second winding tracks 51, 52, by which the pulling element 4 is arranged parallel to the winding shaft 3. The compensating movement A takes place according to the Fig. 2b arrows marked A parallel or perpendicular to the winding tracks 51, 52.

[0049] Fig. Figure 3a shows a sunshade roller blind 1 in which the fabric 2 is completely unwound from the winding shaft 3 and the pull element 6 is completely wound onto the winding element 5. The construction of the sunshade roller blind 1 is identical to that shown in Figure 3a. Fig. 2a.

[0050] Fig. Figure 3b shows the winding element 5 according to detail view D2. Fig.3a. The pulling element 6 is completely wound onto the first and second winding tracks 51, 52 of the winding element 5. A compensating movement A is not possible. Thus, the position of the pulling element 6 relative to the separating element 53 is fixed. Therefore, the parallel alignment of the pulling element 4 to the winding shaft 3 is also no longer changeable as long as the pulling element 6 is not completely unwound.

[0051] The tension element 6 is fixed by being wound onto the winding element 5. As soon as the tension element 6 is wound onto the winding element 5, it is tensioned by its position in the recess 54. At the latest when the winding element 5 has completed one revolution in the direction of rotation R, the tension element 6 is fixed in such a way that it can no longer move relative to the separating element 53 or between the first and second winding tracks 51, 52. REFERENCE MARK LIST 1 sunshade roller blind 2 curtain 21 First Section 22 Second Section 3 winding shaft 4 pull-out element 41 First page 42 Second page 5 winding element 51 First winding lane 52 Second winding track 53 Separating element 54 recess 55 m² floor area 56 outdoor area 6 pull element 61 First End 62 Second Ending 71 First guide rail 72 Second guide rail A compensatory movement D1 Detail view 1 D2 Detail View 2 G Straight R direction of rotation

Claims

[1] Sunshade (1) for a vehicle window, comprising - a curtain (2) designed to at least partially cover the vehicle window when rolled up, - a winding shaft (3) to which a first section (21) of the curtain (2) is attached in such a way that the curtain (2) can be rolled up and down on the winding shaft (3), - an extension element (4) to which a second section (22) of the curtain (2) is attached and the extension element (4) is designed to hold the curtain (2) in a state that is at least partially rolled out, - a winding element (5) which is arranged on the winding shaft (3), wherein the winding element (5) has a first winding track (51) and a second winding track (52) which are spaced apart from each other by means of a separating element (53), and - a pull element (6), ◯ which can be rolled up onto the winding element (5), ◯ which is attached with a first end (61) to a first side (41) of the extension element (4), ◯ which is attached with a second end (62) to a second side (42) of the extension element (4), ◯ which is guided from the first side (41) of the pull-out element (4) via the first and second winding track (51, 52) to the second side (42) of the pull-out element (4), ◯ wherein the pulling element (6) is arranged in a state unwound from the winding element (5) in such a way that a compensating movement (A) between the first and second winding track (51, 52) is possible for the parallel alignment of the pulling element (4) and the winding shaft (3). [2] Sunshade roller blind (1) according to claim 1, characterized by , that the separating element (53) is designed as a wall circumferential in the direction of rotation (R) and the separating element (53) has a recess (54) into which the tension element (6) is movably suspended. [3] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that the pulling element (6) is fixed by rolling it onto the winding element (5). [4] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that the first and second winding track (51, 52) are each designed as a circumferential groove and are arranged essentially parallel to each other in the direction of rotation (R) of the winding shaft (3). [5] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that the first and second winding track (51, 52) are each dimensioned such that they can accommodate several turns of the pulling element (6) when the pulling element (6) is wound up. [6] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that the winding element (5) is fixed immovably to one end of the winding shaft (3). [7] Sunshade roller blind (1) according to one of the preceding claims, characterized by, that the tension element (6) is designed as a rope. [8] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that the winding shaft (3) and the extension element (4) are arranged on opposite sides of the curtain (2). [9] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that the extension element (4) extends essentially over the entire length of the second section (22) of the curtain (2) and is rigidly designed. [10] Sunshade roller blind (1) according to one of the preceding claims, characterized by , that a first and a second guide rail (71, 72) are provided for guiding the pull element (6), which in a rolled-up state of the curtain (2) are arranged essentially parallel to each other laterally on the curtain (2) between winding shaft (3) and pull-out element (4).

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