Sunshade roller blind for vehicle window glass

Abstract

A sunshade roller blind for a window glass according to the present invention comprises: a curtain which at least partially covers the window glass in an unfolded state; the first part of the curtain is fixed on the reel, so that the curtain can be wound and unwound on the reel; a pull-out element to which the second portion of the curtain is fixed, the pull-out element holding the curtain in an at least partially expanded state; and a winding element arranged on the spool and having first and second winding tracks spaced apart from each other by a partition element. The winding element has a traction element that can be wound onto the winding element, the traction element being fixed with a first end and a second end on a first side and a second side of the pull-out element, respectively, and being guided from the first side of the pull-out element to the second side of the pull-out element via a first and a second winding track. The traction element is arranged to be movable in an unwound state from the winding element such that a compensation movement between the first and second winding tracks can be carried out in order to orient the pull-out element and the reel in parallel.

Description

Technical Field

[0001] The invention relates to a sunshade roller blind for vehicle window glass. Background Art

[0002] Modern vehicle body designs are characterized by relatively large window glass areas. This large window glass area leads to significant heating of the vehicle interior when exposed to sunlight. Consequently, more and more vehicles are equipped with window blinds. Various concepts for window blinds are known in the prior art, particularly roller blinds.

[0003] Such a roller blind has a curtain that can be wound up and unwound on a winding shaft. The curtain is preferably rectangular and has a first part fixed to the winding shaft and a second part fixed to a pull-out element, in particular an opposite one. In the at least partially unwound state in which the curtain at least partially covers the vehicle window pane, the winding shaft and the pull-out element are ideally arranged parallel to each other. The curtain is usually wound up and unwound by a cable system, which has a cable on each side. If the cables are of different lengths, this can lead to the pull-out element being tilted in the unwound state. In particular, it is difficult to construct the two cables so that the roller blind is in the desired position in the unwound state and does not tilt. Summary of the Invention

[0004] The technical problem to be solved by the present invention is therefore to provide a sun roller blind for a vehicle window using a structurally simple manner that is as simple as possible, which has a simple and cost-effective structure and is in a desired position in the unfolded state, in which the winding shaft and the extension element are arranged in particular parallel to each other.

[0005] The sunshade roller blind for a vehicle window glass according to the present invention comprises a curtain, which is designed to at least partially cover the vehicle window glass in an unfolded state. In addition, the sunshade roller blind also comprises a roller shaft, on which the first part of the curtain is fixed so that the curtain can be wound and unfolded on the roller shaft. The sunshade roller blind comprises a pulling element, on which the second part of the curtain is fixed. The pulling element is designed so that the curtain is at least in a partially unfolded state. In addition, the sunshade roller blind also comprises a winding element arranged on the roller shaft. The winding element has a first winding track and a second winding track, which are spaced apart from each other by a partition element, i.e., have a certain distance from each other. The sunshade roller blind comprises a traction element that can be wound onto the winding element, the traction element being fixed to a first side of the traction element with a first end, the traction element being fixed to a second side of the traction element with a second end, and the traction element being guided from the first side of the traction element to the second side of the traction element via the first and second winding tracks. The pulling element is arranged so as to be movable in the state unwound from the winding element, so that a compensating movement between the first winding rail and the second winding rail is possible for a parallel alignment of the pull-out element and the winding shaft.

[0006] Roller sunblinds are intended for installation in vehicles, particularly cars and trucks. In the installed state, when the blind is fully wound onto the roller, the blind is not visible. The blind is typically located behind a vehicle's door panel. In the extended state, i.e., when the blind is unrolled or unwound from the roller, the blind partially or completely covers the vehicle's window pane.

[0007] The sunshade roller blind, in particular the curtain, is preferably designed to be rectangular and have a planar structure. The curtain is designed to be flexible rather than rigid so that it can be wound and unwound. For example, the curtain can be or include a fabric. Typically, the reel is mounted on one side of the curtain and the pull-out element is mounted on the other side opposite the pull-out element, in particular arranged parallel thereto. The parallel arrangement facilitates the winding and unwinding of the curtain. Along the other two sides, guide rails are typically arranged between the reel and the pull-out element when the curtain is unwound.

[0008] The first section of the curtain, i.e., one side or edge of the curtain, is immovably arranged on a winding device, in particular a reel. The reel is rotatably supported and has an axis of rotation. The reel rotates about the axis of rotation in a direction of rotation. The first section of the curtain is arranged along the axis of rotation. The reel can be rotationally symmetrical, in particular tubular. The reel can be driven by a motor. This design allows for simple winding and unwinding of the curtain.

[0009] The second part of the curtain - also one side or edge - is fixed to the pull-out element in an immovable manner. The first part and the second part of the curtain are arranged opposite each other. This arrangement facilitates the winding and unwinding of the curtain.

[0010] The winding element is designed so that the traction element can be wound onto or unwound from it. Preferably, the winding element is rotationally symmetrical. The winding element is rotatably supported. The separation element is arranged on the winding element so that a certain distance is formed between the first and second winding tracks. This distance is typically between 0.8 mm and 1.2 mm, and in particular, 1 mm. This distance creates a separation between the first and second winding tracks, allowing the traction element to be wound onto either the first or second winding track without the traction element accidentally moving between the winding tracks.

[0011] The traction element can be wound onto a winding element, in particular onto a first and a second winding track. The width of the winding track is between 0.8 mm and 1.2 mm, in particular 1 mm. When winding, the traction elements can be arranged side by side in the corresponding winding tracks. However, it is preferred that when winding, the traction elements are arranged one above the other. Thus, the winding tracks can be designed to be narrower and thus save space. The traction element is preferably designed as a separate, continuous, elongated and flexible element. The first end of the traction element is arranged in a non-movable manner on the first side of the pull element, and the second end of the traction element is arranged in a non-movable manner on the second side of the pull element. The traction element is fixed in a non-movable manner only in these two positions.

[0012] The traction element is guided or directed from a first side of the pull-out element, in particular along one of the guide rails, and in particular via at least one deflecting element, to the first winding track. From the first winding track, the traction element is guided to the second winding track, in particular via a separator element. The traction element is arranged in such a way that its direction follows the direction of the separator element, i.e., changes by approximately 180° during the transition from the first winding track to the second winding track. This means that the traction 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, in particular, along another guide rail, in particular via at least one further deflecting element, the traction element is guided to the second side of the pull-out element.

[0013] When the traction element is fully unwound from the winding element, the curtain is fully wound onto the reel, and vice versa. In the state fully unwound from the winding element, the traction element is arranged to be movable relative to the first winding track and the second winding track, and in particular also relative to the partition element. The traction element can move a small distance, approximately up to 8 mm, between the first and second winding tracks. Therefore, the traction element can move in the area of ​​the partition element. This movement of the traction element is transmitted to the first and second ends of the traction element and therefore to the first and second sides of the drawer element. The first and second sides are arranged at opposite ends of the drawer element, preferably close to the guide rails. Therefore, a compensating movement can occur, which orients or arranges the drawer element parallel to the reel.

[0014] The advantage of this solution is that two separate pulling elements are not required. Instead, a single pulling element is used to orient the extension frame in the fully extended state of the pulling element and thus bring the upper end of the curtain into the desired position parallel to the winding axis. This compensating movement is performed every time the roller blind is fully retracted and thus wound up. As a result, the roller blind is always extended and extended in the correct position without the pulling element being in an inclined position. Deflection in the extended position is avoided. This makes the roller blind more durable. This design ensures smooth operation even after many years. Since only one pulling element is required, there is no need to time-consumingly coordinate the length tolerances of the two pulling elements. In addition, only one winding element is required. This is a relatively cost-effective solution.

[0015] One possible embodiment of the present invention provides that the separating element is designed as a wall extending in the direction of rotation. This wall forms the spacing between the first and second winding rails. This wall extends up to 10 mm from the bottom surface of the winding rails. Furthermore, in a preferred embodiment, the separating element has a recess into which the traction element is movably suspended. The recess is preferably designed as a groove and extends from the outside of the wall toward the bottom surface, in particular to the bottom surface. The recess is designed so that the traction element can be movably arranged therein. Therefore, the thickness of the recess must be greater than the thickness of the traction element. Mobility is important because it allows for compensating movements. The traction element is suspended in the recess. This means that the traction element cannot easily escape from the recess.

[0016] This configuration has the advantage that the guiding of the traction element is simple and reliable.

[0017] Alternatively, the separating element can be simply designed as a hook, into which the pulling element is movably suspended. This is a particularly simple separating element construction.

[0018] Another embodiment of the invention provides for securing the traction element by winding it onto a winding element. A compensating movement for orienting the traction element is only possible when the traction element is completely or almost completely unwound from the winding element. Once the traction element is wound onto the winding element, it is tensioned by the separating element, in particular by positioning the traction element within the gap. Once the winding element has been rotated one revolution in the direction of rotation, the traction element is secured and can no longer move between the first and second winding rails.

[0019] This configuration has the advantage that the pulling element is fixed in a simple manner and thus maintains the correct position of the extension frame when the roller blind is unfolded.

[0020] According to a preferred solution, the first and second winding tracks are respectively designed as circumferential grooves and are arranged substantially parallel to each other along the rotation direction of the winding shaft.

[0021] This configuration has the advantage that the traction element can be guided well in the groove and thus ensures that the traction element can be wound onto the winding element or unwound from the winding element without interference.

[0022] One possible design of the roller blind provides that the first and second winding rails are each dimensioned such that, when the traction element is wound up, they can accommodate multiple turns of the traction element. These turns can be arranged side by side in the respective winding rails. However, they are preferably arranged one above the other.

[0023] The advantage of this design is that the size ratio between the traction element and the winding rail can be determined so that the traction element has sufficient space when winding. However, the winding rail should not be designed too large, because then friction-free winding would no longer be guaranteed. During winding, the traction element is fixed by multiple turns.

[0024] In another embodiment, the winding element is immovably fixed to the end of the winding shaft. The winding element can be fixed completely to the end of the winding shaft or fixed close to the end of the winding shaft. The winding element is firmly connected to the winding shaft. The winding element is fixed to the winding shaft in such a way that when the curtain is unwound from the winding shaft, the pulling element is simultaneously wound onto the winding element, and vice versa.

[0025] The advantage of this configuration is that the winding element rotates together with the reel during winding and unwinding, thereby ensuring frictionless operation. The arrangement on the end is a structurally simple option.

[0026] According to one embodiment, the traction element is designed as a cable. The traction element is designed to be long, thin, and flexible. Furthermore, the traction element is preferably designed as a single piece, at least continuous or coherent. A particularly suitable cable can be made of, or comprise, ultra-high molecular weight polyethylene (PE-UHMW, such as Dyneema).

[0027] The cable is inexpensive and very suitable for the function of sunshade roller blinds.

[0028] In a further embodiment, the winding shaft and the pulling element are arranged on opposite sides of the curtain.

[0029] This ensures simple positioning of the pull-out element relative to the winding shaft by means of a compensating movement.

[0030] According to one embodiment, the pull-out element extends substantially over the entire length of the second portion of the curtain and is at least substantially rigid. Rigidity means stiff, ie non-flexible. The pull-out element has an elongated shape and can be configured as a frame.

[0031] The advantage of this construction is that it ensures simple winding and unfolding of the sunshade roller blind.

[0032] According to a preferred embodiment, a first guide rail and a second guide rail are provided for guiding the pulling element. When the curtain is unrolled, the first and second guide rails are arranged substantially parallel to each other on the sides of the curtain between the winding shaft and the pull-out element. The guide rails are not fixedly connected to the curtain. In the case of a rectangular curtain, the guide rails for guiding the pulling element are preferably arranged parallel to each other on two opposite sides. Deflection elements, such as deflection rollers, may be provided on the guide rails, respectively, at the top and bottom, for guiding the pulling element. The pull-out element or winding shaft is mounted on the sides of the curtain that do not have guide rails.

[0033] Reliable guidance of the traction element and friction-free functionality of the roller blind are thus ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following describes a preferred embodiment of the present invention with reference to the accompanying drawings. Figure 1 The schematic diagram shows a sunshade roller blind according to the prior art. Figure 2a The schematic diagram shows a sunshade roller blind with a rolled-up curtain. Figure 2b The schematic diagram shows a winding element with an unwound traction element. Figure 3a The schematic diagram shows a roller sunblind with the curtain extended. Figure 3b The schematic diagram shows a winding element with a wound-up traction element.

[0035] The drawings are merely schematic and serve only to explain the invention. Identical or functionally identical elements are always provided with the same reference numerals. DETAILED DESCRIPTION

[0036] Figure 1 A roller sunblind according to the prior art is shown, which has two pulling elements and two winding elements, each arranged at the side edges of the blind.

[0037] Figure 2a A roller sunblind 1 according to the present invention is shown. The illustrated embodiment shows the roller sunblind 1 in a rolled-up state, where it does not cover the vehicle window pane. The dashed line G schematically represents the transition from the vehicle's door panel to the window pane. This means that in the figure, the door panel is below line G, while the window pane is above it.

[0038] The sunshade roller blind 1 comprises a curtain 2, a winding shaft 3 and a pull-out element 4. A first portion 21 of the curtain 2 (not visible in FIG. 2 ) is fixed to the winding shaft 3, and a second portion 22 of the curtain is fixed to the pull-out element 4. The sunshade roller blind 1 also comprises a winding element 5 fixed to the end of the winding shaft 3. The winding element 5 is shown in the detail view D1. Figure 2b The roller blind 1 further comprises a first guide rail 71 and a second guide rail 72 .

[0039] The sunshade roller blind 1, and in particular its curtain 2, is designed to be rectangular. The winding shaft 3 and the pulling element 4 are fixed in parallel to each other on two opposite sides of the curtain 2. When the curtain 2 is unfolded, the first and second guide rails 71, 72 are arranged in parallel to each other on the other two opposite sides of the curtain 2.

[0040] The roller blind 1 also includes a traction element 6 that can be wound onto the winding element 5. In the present embodiment, the traction element 6 is a continuous cable, which is fixed at a first end 61 to the first side 41 of the pull element 4 and at a second end 62 to the second side 42 of the pull element 4. The pull element 4 is designed to be elongated, with the first side 41 and the second side 42 forming the ends of the pull element. The traction element 6 is guided from the first side 41 of the pull element 4 via a first guide rail 71 to the winding element 5 and then via a second guide rail 72 to the second side 42 of the pull element 4. Deflection elements (not shown) are required to ensure the correct guidance of the traction element 6.

[0041] Sunshade roller blind 1 or its curtain 2 according to Figure 2a Completely wound onto the reel 3, i.e. wound as far as possible or intentionally. This means that the traction element 6 is simultaneously completely unwound from the winding element 5. And vice versa. In the state in which the traction element 6 is completely unwound from the winding element 5, the traction element 6 is arranged on the reel 5 in a movable manner. The movement of the traction element 6 relative to the reel 5 is transmitted to the first side 41 and the second side 42 of the pulling element 4 via the first end 61 and the second end 62 of the traction element 6. The first side 41 and the second side 42 are arranged on opposite ends of the pulling element 4, which is designed to be elongated. If the pulling element 4 tilts relative to the reel 3, a compensating movement of the pulling element 6 can occur, which causes the pulling element 4 to be oriented or arranged parallel to the reel 3 as desired.

[0042] The direction of rotation R is Figure 2a As shown in Figure 2a When the reel 3 or its axis of rotation is viewed from the left, the direction of rotation R is clockwise. Figure 2a In the embodiment of the invention, the curtain 2 is rotated in the direction of rotation R, the curtain 2 is simultaneously unwound from the winding shaft 3 and the traction element 6 is wound onto the winding element 5 .

[0043] Figure 2b Shows Figure 2a Detail D1. The winding element 5 is fixedly connected to the reel 3 and rotates with the reel 3 in the rotation direction R. The winding element 5 has a first winding track 51 and a second winding track 52. The first winding track 51 and the second winding track 52 are each designed as a surrounding groove and are arranged parallel to each other in the rotation direction R of the reel 3.

[0044] A partition element 53 is arranged between the two winding rails 51, 52. The partition element 53 is designed as a wall extending in the direction of rotation R. This wall forms the spacing between the first and second winding rails 51, 52. The partition element 53 extends away from the bottom surface 55 of the winding rails 51, 52. The partition element 53 also has a recess 54. The recess 54 is designed as a groove and extends from the outer surface 56 of the partition element 53 to the bottom surface 55 of the winding rails 51, 52, that is, in the direction of the rotation axis.

[0045] The traction element 6 is arranged in a movable manner in the gap 54, that is, it can move relative to the partition element 53 and the winding rails 51, 52. The traction element 6 is suspended in the gap 54. The traction element 6 is kept under a high tension so that the traction element 6 remains arranged in the gap 54 and does not fall out.

[0046] The traction element 6 is guided from the first guide rail 71 into the first winding track 51. From there, the traction element 6 is guided into the gap 54 of the partition element 53 and further into the second winding track 52. Here, the traction element 6 is deflected 180°. This means that the traction 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 traction element 6 is guided to the second guide rail 72.

[0047] Since the pulling element 6 is arranged as described above so as to be movable in the state completely unwound from the winding element 5, a compensating movement A of the pulling element 6 between the first and second winding rails 51, 52 is achieved, by which the pull-out element 4 is arranged parallel to the winding shaft 3. According to the arrow marked A in FIG. 2 , the compensating movement A takes place parallel to, that is, transversely to, the winding rails 51, 52.

[0048] Figure 3a The sunshade roller blind 1 is shown, wherein the curtain 2 is completely unwound from the winding shaft 3 and the traction element 6 is completely wound onto the winding element 5. Figure 2a Same as shown.

[0049] Figure 3b Shown Figure 3aDetail D2 of the winding element 5. The traction element 6 is completely wound onto the first and second winding tracks 51, 52 of the winding element 5. Compensation movement A is not possible. Therefore, the position of the traction element 6 relative to the separation element 53 is fixed. Consequently, the parallel alignment of the traction element 4 to the winding shaft 3 does not change until the traction element 6 is completely unwound.

[0050] The traction element 6 is fixed by being wound onto the winding element 5. Once the traction element 6 has been wound onto the winding element 5, it is tensioned by being arranged in the recess 54. At the latest after one rotation of the winding element 5 in the direction of rotation R, the traction element 6 is fixed in such a way that the traction element 6 can no longer move relative to the partition element 53 or between the first winding rail 51 and the second winding rail 52.

[0051] Reference Signs List 1 sunshade roller blind 2 Curtain 21 Part 1 22 Part 2 3 scrolls 4 Pull-out elements 41 First side 42 Second side 5 Winding elements 51 First winding track 52 Second winding track 53 Separator 54 Gap 55 Bottom 56 outside 6 traction elements 61 First End 62 Second End 71 First Rail 72 Second rail A. Compensatory movement D1 details D2 details G Straight Line R Rotation direction

Claims

1. A sunshade roller blind (1) for a vehicle window glass, comprising: a curtain (2) designed to at least partially cover the vehicle window pane in the unfolded state a winding shaft (3) on which the first part (21) of the curtain (2) is fastened in such a way that the curtain (2) can be wound up and unwound on the winding shaft (3), a pull-out element (4), to which the second part of the curtain (2) is fixed, and which is designed to bring the curtain (2) into an at least partially extended state, a winding element (5) arranged on the winding shaft (3), wherein the winding element (5) has a first winding track (51) and a second winding track (52), the first winding track (51) and the second winding track (52) being spaced apart from each other by a separating element (53), and - a traction element (6), which can be wound onto the winding element (5), the traction element (6) being fixed with a first end (61) to a first side (41) of the drawer element (4), the traction element (6) being fixed with a second end (62) to a second side (42) of the drawer element (4), the traction element (6) being guided from the first side (41) of the drawer element (4) to the second side (42) of the drawer element (4) via a first winding track (51) and a second winding track (52), wherein the traction element (6) is arranged to be movable in a state unwound from the winding element (5) such that a compensating movement (A) between the first winding track (51) and the second winding track (52) can be carried out in order to orient the drawer element (4) and the reel (3) in parallel.

2. The sunshade roller blind (1) according to claim 1, characterized in that: The partition element (53) is designed as a wall extending circumferentially in the direction of rotation (R) and has a recess (54) into which the traction element (6) is movably suspended.

3. The sunshade roller blind (1) according to claim 1 or 2, characterized in that: The pulling element (6) is fixed by being wound onto the winding element (5).

4. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that The first winding track (51) and the second winding track (52) are respectively designed as surrounding grooves and are arranged substantially parallel to each other along the rotation direction (R) of the winding shaft (3).

5. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that The dimensions of the first winding track (51) and the second winding track (52) are respectively determined so that the first winding track (51) and the second winding track (52) can receive multiple turns of the traction element (6) when the traction element (6) is wound.

6. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that The winding element (5) is fixed in an immovable manner on the end of the winding shaft (3).

7. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that The traction element (6) is designed as a cable.

8. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that The winding shaft (3) and the pulling element (4) are respectively arranged on two opposite sides of the curtain (2).

9. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that The pulling element (4) extends substantially over the entire length of the second part (22) of the curtain (2) and is designed to be rigid.

10. The sunshade roller blind (1) according to any one of the preceding claims, characterized in that A first guide rail (71) and a second guide rail (72) for guiding the traction element (6) are provided. When the curtain (2) is unfolded, the first guide rail (71) and the second guide rail (72) are arranged substantially parallel to each other on the side of the curtain (2) between the winding shaft (3) and the pulling element (4).

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