Shading device, guide rail, roof and motor vehicle for motor vehicles

Abstract

The invention relates to a screening device (25) for a vehicle (20), comprising: a rolling curtain web (1) and a winding shaft (30) for winding and unwinding the rolling curtain web (1) in an extension direction (26), and guide rails (24) which are arranged opposite to each other and each have a guide channel (10) extending in the extension direction (26), wherein when being rolled up and unrolled, the rolling curtain web (1) is displaceably moved in the guide channel on opposite sides (5) in the extension direction (26). The invention relates to a roller blind web (1) which is guided in a guide channel (10) of a rail (24) and extends between the guide rails (24) so ​​that a roller blind web (1) is guided out of each guide channel (10) along a deflection region (12) in the direction of a corresponding other guide channel (10), wherein the roller blind web (1) is supported on the associated guide rail (24) in the corresponding deflection region (12), characterized in that each guide rail (24) is designed in the deflection region (12) such that the roller blind web (1) is in at least partial linear contact. The invention also relates to a guide rail (24), a vehicle roof (21) and a vehicle (20).

Description

Technical Field

[0001] The invention relates to a shielding device for a vehicle, a guide rail for the shielding device, a vehicle roof and a vehicle. Background Art

[0002] Shielding devices with roller blind webs (also called roller blind web arrangements) for vehicles are known from the prior art. The purpose of such shielding devices is to protect against solar radiation below a transparent roof part of a vehicle. This can be, for example, a panoramic glass roof or a sunroof. Usually, the roller blind web is tensioned in the direction of extension, approximately in the longitudinal direction of the vehicle. In addition, in order to avoid any drooping of the roller blind web and its flapping or vibrations, the roller blind web is also tensioned transversely to the direction of extension. Such a roller blind arrangement is known, for example, from EP 2 004 430 B1. Summary of the invention

[0003] The invention is based on the object of providing a concept for a shielding device which facilitates precise and, in particular, low-noise operation.

[0004] According to one aspect, a shielding device for a vehicle is disclosed. The shielding device has a rolling curtain web and a winding shaft for winding and unwinding the rolling curtain web in an extension direction. The shielding device has guide rails, which are arranged opposite to each other and respectively have guide channels extending in the extension direction. The rolling curtain web is guided in the guide channels of the guide rails in a displaceable manner in the extension direction on opposite sides when being rolled up and unrolled, and extends between the guide rails, so that the rolling curtain web is guided out of each guide channel along a deflection region in the direction of a corresponding other guide channel, wherein the rolling curtain web is supported on the relevant guide rail in the corresponding deflection region. Each guide rail is configured in the deflection region so that the rolling curtain web forms at least partially linear contact.

[0005] Partial linear contact or linear support means that the roller blind web is at least partially supported on the guide rail along one or more lines in the extension direction in the deflection area. In other words, linear support means that the deflection area is configured in its shape so that the roller blind web is at least partially supported on an area of ​​the guide rail with a cylindrical or rounded shape, thereby avoiding surface contact, in particular complete surface contact or smooth surface contact. The expression "linear support" also includes examples of surface support that cannot be discerned by the naked eye. In other words, the term includes examples of extremely small, for example microscopic, surface support. Also included are embodiments in which the roller blind web is, for example, molded at least partially around a wavelet area. Broadly speaking, the roller blind web is not intended to be completely supported on the guide rail in the deflection area. The linear support is carried out along the guide rail, approximately (more or less) in the extension direction.

[0006] Due to the corresponding shaping of the deflection area, the surface support that is usually provided is at least partially, for example locally, converted into a linear support. As a result, the point pressure changes in the deflection area, for example the contact surface or contact area, between the guide rail and the roller blind web. This causes the friction forces to change and to be excited at different friction frequencies when the roller blind web is rolled up and unrolled. This contributes significantly to reducing or even avoiding the generation of noise. In particular, this helps to avoid squeaking when the roller blind web is rolled up and unrolled.

[0007] There are many conceivable options for the specific configuration of the deflection region.

[0008] For example, the deflection area of ​​each guide rail has a wavy profile or a grooved profile. Alternatively or additionally, the deflection area of ​​each guide rail has a profile formed at least in part by alternating grooves and waves. Alternatively or additionally, the deflection area of ​​each guide rail has a profile with wave crests (positive parts of conventional sine functions) arranged in rows. Alternatively or additionally, the deflection area of ​​each guide rail has a cauliflower-shaped profile. Other configurations and combinations of the above-described embodiments are also conceivable.

[0009] The above-mentioned embodiments can achieve the advantages and functions mentioned at the beginning.

[0010] According to one embodiment, the roller blind width is formed by a roller blind material, each of the opposite lateral edges of which is fixed with a fabric element. Each fabric element has a guide portion, which is guided in a guide channel of a corresponding guide rail. Each fabric element is supported on a corresponding deflection area and is guided out of a corresponding guide channel. The fabric element is usually formed of a different material than the roller blind material and is in the form of a side strip. The fabric element is fixedly connected to the roller blind material, for example in a material-bonded manner. The fabric element is, for example, a fabric strip made of a material and is appropriately formed in a multi-fold or multi-layer manner for guidance in a guide channel. Alternatively, the fabric element is a fabric module, which is a fabric strip with additional reinforcement elements. The reinforcement elements are used for safe and stable guidance in the guide channel.

[0011] The above-mentioned problems arise in particular when using the above-mentioned fabric elements, which problems are largely avoided by the described adjustment of the guide rails.

[0012] According to one embodiment, the roller blind web is tensioned transversely to the extension direction, at least when being rolled up and unrolled. In particular, in the case of roller blind webs that are under great tension, the problems mentioned at the outset can be avoided particularly effectively. In particular, considerable improvements are achieved in this way with respect to noise emissions during operation of the screening arrangement.

[0013] According to one embodiment, the deflection area of ​​each guide rail is configured such that between two deflection areas the distance between the roller blind web and the respective guide rail is large enough that the roller blind web cannot come into contact with the guide rail in the operating state of the screening device. Due to this distance adjustment or height adjustment, the well-known material knocking is avoided. In particular in the case of ultrasonic welding of the fabric element to the roller blind material, the material would otherwise be very close to the guide rail and would become hardened due to the welding operation and knock against the guide rail, for example due to excitation by a drive profile in the vehicle. Increasing this distance to a sufficiently large size contributes significantly to reducing noise emissions.

[0014] According to a further aspect, a guide rail for a screening arrangement according to one of the above embodiments is disclosed. The guide rail has a guide channel for displaceably guiding a roller blind web. The guide rail has an opening through which the roller blind can be guided out of the guide channel along a deflection region. The guide rail is configured in the deflection region such that in an operating state together with the roller blind web, the roller blind web can form at least partially linear contact.

[0015] According to a further aspect, a roof for a vehicle is disclosed, the roof having a shading device according to one of the above-described embodiments, the shading device being coupled to the roof.

[0016] According to a further aspect, a vehicle is disclosed having the above-mentioned roof fixedly coupled to a roof body.

[0017] The guide rail, the roof and the vehicle according to further aspects can achieve the above advantages and functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Further advantages and functions are described in the following description of specific exemplary embodiments with the aid of the drawings. In all figures, structurally or functionally identical elements are identified by the same reference numerals.

[0019] In the attached figure:

[0020] Figure 1 shows a schematic perspective view of a vehicle,

[0021] Figure 2 shows a schematic cross-sectional view of a guide rail,

[0022] Figure 3 shows a schematic cross-sectional view of a guide rail according to an exemplary embodiment of the present invention,

[0023] Figure 4 Shown according to Figure 2 and Figure 3 an overlay of the corresponding detail view of the rail, and

[0024] Figure 5is a schematic cross-sectional view of a shielding device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0025] Figure 1 A schematic view of a vehicle 20 is shown, which has a roof 21, on which a roof opening 22 is provided. The vehicle roof 21 is fixedly coupled to the rest of the roof body. The roof opening 22 can be selectively closed or at least partially opened by means of a displaceable sunroof cover. Alternatively, the roof opening 22 is permanently closed by means of a transparent roof element, for example a panoramic roof. In this case, a non-displaceable transparent roof element is provided. The roof opening 22 is delimited by a roof opening frame 23 formed on the roof 21. The roof opening frame 23 has guide rails 24 arranged on both sides, wherein a shielding device 25 is arranged below the displaceable sunroof cover. The shielding device 25 has a roller blind web 1, which can be displaced forwards and backwards in an extension direction 26, so that the roller blind web 1 can be rolled up and unrolled. The extension direction 26 extends essentially parallel to the longitudinal axis of the vehicle 20. The roller blind web 1 is used to allow sunlight and ambient light to enter the vehicle 20 through the roof opening 22 , or to prevent sunlight and ambient light from entering the vehicle 20 .

[0026] The roller blind web 1 is guided laterally in the guide rails 24 and extends between the guide rails 24 at least when it is rolled up and unrolled. The roller blind web 1 can be completely rolled up at the rear end relative to the extension direction 26. For this purpose, for example, a winding device 29 is provided, which has a winding shaft 30 (also called roller blind shaft). The last two elements are only Figure 1 Schematically shown in FIG. The blind web 1 is rolled up on a winding shaft 30 to form a blind roll, wherein the winding shaft 30 has a winding spring, which applies tension to the blind web 1 along the extension direction 26 to tighten the blind web 1 (not shown). In order to extend or displace the blind web 1, at least one pull bow 27 is optionally provided at the front end 28 of the blind web 1, and the pull bow 27 is provided for actuating the blind web 1.

[0027] Alternatively, the roller blind web 1 can also be actuated automatically, for example via an electrical device. It should also be mentioned that the winding device 29 can also be designed in another way. For example, no winding shaft is provided. The roller blind web 1 is thus rolled up to form a roller blind roll without a winding shaft. Furthermore, it is not absolutely necessary to provide a winding spring. The tension in the extension direction 26 can also be applied in another way, for example via a lateral guide element, such as a roller blind spring.

[0028] Figure 2A cross section through a guide rail 24 according to one embodiment is schematically shown. The guide rail 24 has a guide channel 10 in an extension direction 26 (perpendicular to the plane of the drawing), which is designed for displaceably guiding the roller blind web 1. The guide rail 24 has an opening 11, from which the roller blind web 1 extends to an opposite second guide rail. The guide rail 24 also has a deflection region 12, along which the roller blind web 1 is supported in the operatively mounted state. According to Figure 2 , the deflection region is designed in a circular manner and enables the roller blind web to be supported flat during operation.

[0029] Figure 3 A guide rail 24 according to an exemplary embodiment of the invention is schematically shown. Compared to the previous guide rails, this guide rail 24 has a wave-shaped profile 17 in the deflection region 12, whose surface features small waves and grooves. This profile can also be called a "cauliflower profile". Therefore, in the operating state, the roller blind web is not supported completely on the guide rail 24 in the deflection region 12, but at least partially in the form of a linear contact.

[0030] Figure 4 Shown on an enlarged scale Figure 3 Detail 13 of which the view is Figure 3 A similar detail of FIG. 1 is superimposed. Here the difference between the two profiles is shown.

[0031] Please also note that if Figure 3 and Figure 4 As shown, the upper part 14 of the guide rail 24 delimiting the guide channel 10 and the opening 11 can also have a wave-shaped contour 17 with waves and grooves, optionally on the bottom side 15. The bottom side 15 is accordingly facing the interior of the guide channel 10.

[0032] according to Figure 3 The guide rail 24 enables the above-mentioned advantages and functions.

[0033] Furthermore, the distance A1 between the upper edge 16 of the deflection region 12 and a portion of the guide rail 24 which is located between the deflection regions 12 of two guide rails 24 during operation is equal to the distance A2 of the upper edge 16 of the deflection region 12 according to Figure 2 The distance A2 of the guide rail 24 is larger than that of the guide rail 24. Therefore, the material knock mentioned at the beginning is avoided or at least reduced.

[0034] Figure 5A schematic cross-sectional view of a screening device 25 with a roller blind web 1 according to an exemplary embodiment of the invention is shown. The roller blind web 1 has a roller blind material 2 and, on opposite sides 5 facing the guide rails 24, respectively a textile element 3, which is respectively formed as a textile module with a reinforcement element 4, for example a metal strip, and is fixedly connected to the roller blind material 2, for example by means of ultrasonic welding. The textile elements 3 are attached to opposite lateral edges 6 of the roller blind material 2.

[0035] In the operating state, the roller blind web 1 is guided in the guide channel 10 of the two guide rails 24 by means of the guide section 7 of the fabric element 3 and extends between the two guide rails 24. In this case, the roller blind web 1 is tensioned transversely to the extension direction 26. The fabric element 3 is guided on the bottom side 15 in a form-fitting manner and is guided out of the guide channel 10 through the opening 11 around the deflection area 12 in a tightly supported manner. Taking into account the corresponding contour of the deflection area 12, at least partial linear contact of the fabric element 3 occurs.

[0036] Reference numerals list

[0037] 1 Roller blind width

[0038] 2 Roller blind material

[0039] 3 Fabric elements

[0040] 4 Reinforcement elements

[0041] 5 Side

[0042] 6 Lateral edges

[0043] 7 Boot section

[0044] 10. Guide Channel

[0045] 11 Opening

[0046] 12 Deflection area

[0047] 13 Details

[0048] 14 Upper part

[0049] 15 Bottom

[0050] 16 Top edge

[0051] 17 Wavy outline

[0052] 20 Vehicles

[0053] 21 Roof

[0054] 22 Roof opening

[0055] 23 Roof opening frame

[0056] 24 Rails

[0057] 25 Shielding device

[0058] 26 Extension direction

[0059] 27 Drawing the bow

[0060] 28 Frontend

[0061] 29 Winding device

[0062] 30 Winding shaft

[0063] A1 Distance

[0064] A2 Distance

Claims

1. A shielding device (25) for a vehicle (20), the shielding device (25) comprising: - a roller blind web (1) and a winding shaft (30) for winding and unwinding the roller blind web (1) in an extension direction (26), and - guide rails (24) which are arranged opposite one another and each have a guide channel (10) extending in an extension direction (26), in, The roller blind web (1) is displaceably guided in guide channels (10) of guide rails (24) on opposite sides (5) in an extension direction (26) when being rolled up and unrolled, and extends between the guide rails (24), so that the roller blind web (1) is guided out of each guide channel (10) along a deflection region (12) in the direction of the respective other guide channel (10), wherein the roller blind web (1) is supported on the associated guide rail (24) in the respective deflection region (12), The invention is characterized in that each guide rail (24) is configured in the deflection area (12) such that the roller blind web (1) forms at least partially linear contact, thereby avoiding surface contact in the extension direction (26), wherein the deflection area (12) of each guide rail (24) has a cauliflower-shaped profile formed at least partially by alternately arranged grooves and waves, The bottom side (15) of the upper part (14) of the guide rail facing the guide channel (10) has a wave-shaped profile (17) with waves and grooves.

2. The shielding device (25) according to claim 1, wherein: A roller blind web (1) is formed from a roller blind material (2), to each of which opposite lateral edges (6) a textile element (3) is fastened, wherein: - each fabric element (3) has a guide portion (7) which is guided in a guide channel (10) of a corresponding guide rail (24), and Each fabric element (3) is supported on a corresponding deflection region (12) and guided out of a corresponding guide channel (10).

3. The shielding device (25) according to claim 1 or 2, wherein: At least when being rolled up and unrolled, the roller blind web (1) is tensioned transversely to the direction of extension (26).

4. The shielding device (25) according to claim 1 or 2, wherein: The deflection area (12) of each guide rail (24) is configured so that between two deflection areas (12), the distance (A1) between the roller blind web (1) and the corresponding guide rail (24) is large enough to prevent the roller blind web (1) from contacting the guide rail (24) in the operating state of the screening device (25).

5. A guide rail (24) for a screening arrangement (25) according to any one of the preceding claims, wherein: - the guide rail (24) has a guide channel (10) for displaceably guiding the roller blind web (1), and the guide rail (24) has an opening (11) through which the roller blind web (1) can be guided out of the guide channel (10) along the deflection region (12), The invention is characterized in that the guide rail (24) is designed in the deflection area (12) such that in the operating state together with the roller blind web (1), the roller blind web (1) can form at least partially linear contact, wherein the deflection region (12) of each guide rail (24) has a cauliflower-shaped profile at least partially formed by alternately arranged grooves and waves, The bottom side (15) of the upper part (14) of the guide rail facing the guide channel (10) has a wave-shaped profile (17) with waves and grooves.

6. A roof (21) for a vehicle (20), the roof (21) include: The shielding device (25) according to any one of claims 1 to 4, wherein the shielding device (25) is coupled to a vehicle roof (21).

7. A vehicle (20), comprising: The vehicle roof (21) according to claim 6, wherein the vehicle roof (21) is fixedly coupled to a vehicle roof body.

Images