DE102020108874A1 - Darkening device for a motor vehicle, vehicle roof and motor vehicle - Google Patents

Abstract

A darkening device (10) for a motor vehicle has a roll-up and unwinding roller blind (11) and two guide rails (12) which are arranged on opposite sides in relation to a pull-out direction (L) and each one extending along the pull-out direction (L) Have guide channel (13). The darkening device (10) also has two connecting elements (14) which, in relation to the extension direction (L), are connected on opposite sides to a respective side edge (23) of the roller blind (11). The roller blind (11) is guided by means of the connecting elements (14) on opposite sides during winding and unwinding in the guide channels (13) of the guide rails (12) so that it can be displaced along the extension direction (L) and extends between the guide rails (12) in this way that the connecting elements (14) rest on the associated guide rail (12) and are guided out of the respective guide channel (13) along two deflection areas (21, 22) in the direction of the respective other guide channel (13). The deflection areas (21, 22) are set up in such a way that the connecting elements (14) are S-shaped when the roller blind sheet (11) is wound up or unwound relative to a cross section transverse to the pull-out direction (L).

Description

The invention relates to a darkening device for a motor vehicle. The invention also relates to a vehicle roof for a motor vehicle and a motor vehicle.

Darkening devices (also called roller blind arrangements) with roller blinds for use in a vehicle are known from the prior art. Such darkening devices serve to protect against solar radiation under a transparent roof section of the vehicle. For example, it can be a glass panoramic roof or a sliding roof. Typically, the roller blind is tensioned in a pull-out direction, for example the longitudinal direction of the vehicle. In addition, the roller blind is also stretched transversely to the pull-out direction in order to prevent the roller blind from sagging and from fluttering or swinging. Such a roller blind arrangement is, for example, from EP 2 004 430 B1 known.

It is an object on which the present invention is based to specify a darkening device which is particularly flat and inexpensive to manufacture and also enables precise and low-noise operation.

According to one aspect, a blackout device for a motor vehicle is disclosed. The darkening device has a roller blind and a winding shaft for winding and unwinding the roller blind along a pull-out direction. The darkening device has guide rails which are arranged opposite one another in relation to the direction of extension and each have a guide channel extending along the direction of extension. The darkening device also has connecting elements which, in relation to the pull-out direction, are connected on opposite sides to a respective side edge of the roller blind. The connecting elements are preferably designed as a lateral guide band, in particular as a textile belt or textile module. In the following description, the darkening device is described mainly in connection with textile tapes. The described properties and features of the darkening device can, however, analogously also be transferred to connecting elements configured in other ways.

The roller blind is guided along the extension direction by means of the connecting elements or the textile strips on opposite sides during winding or unwinding in the guide channels of the guide rails and extends between the guide rails in such a way that the textile strips rest against the associated guide rail and out of the respective guide channel are guided out along two deflection areas in the direction of the other guide channel. The deflection areas are set up in such a way that, when the roller blind is wound or unwound, the textile strips are oriented or designed in an S-shape with reference to a cross section transverse to the pull-out direction.

A precise and low-noise darkening of a vehicle interior is possible by means of the described darkening device. In addition, due to the structure described, the darkening device can be manufactured particularly flat and inexpensive.

It is a finding in connection with the present invention that, in the case of thin shading or roller blind fabrics, a total thickness of components that can be wound and unwound in a lateral guide is greater than a thickness in a central region of the roller blind. This can cause the roller blind to sag, as there is insufficient tension in the pull-out direction. This often leads to a so-called “bow wave effect” when opening the blind or when pulling out the blind because of the insufficient tension in the blind fabric. Such sagging can be counteracted by means of the described darkening device and the formation of a blind belly can be reduced.

Furthermore, a particularly flat design of the darkening device can be realized through the specifically predetermined S-shaped design of the textile strips when the roller blind is wound and unwound. Conventional concepts generally have three or four layers of components that can be rolled up and which, when rolled up, form a correspondingly large overall thickness. The total thickness in such a lap is also referred to as the pitch. In the case of a metal band, which is sewn into a textile element, for example, the pitch is composed of the thickness of the metal band and four layers of the textile element and the associated sewing thread and can therefore be 1.2 mm.

Alternatively, a conventional textile element can be T-shaped and sewn or glued with a metal band, so that a pitch is given by the thickness of the metal band and two or three layers of the textile element. The pitch or the total thickness can thus be reduced and have a value below 1 mm. However, such a design can have a disadvantageous effect on the transmission of force when the roller blind web is wound and unwound and, for example, because of a design that is not suitable for adhesive, it cannot implement a robust darkening system with regard to the forces acting.

By means of the darkening device described, a particularly flat structure can be realized in which only one layer of the respective textile tape is rolled up in the roll and thus an overall thickness is kept small. If the textile bands are connected, for example, to a guide band in the form of a metal band that can be wound and unwound, a pitch with a value of well below 1 mm, for example approximately 0.4 mm, can be formed. In addition, reliable and robust operation of the darkening device can be established.

According to a preferred development, the darkening device has metal strips which are connected, in particular glued, to the respective textile strip on opposite sides in relation to the pull-out direction of the roller blind. The metal strips are slidably mounted in the respective guide channel of the associated guide rail for guiding the roller blind during winding or unwinding.

In particular, the textile strips can be arranged in such a way that they each cover both an upper side and an underside of the associated metal strip at least in sections when winding or unwinding the roller blind, so that the first deflection area above the respective metal strip and the second deflection area on an inner edge of the respective metal band is formed. In this way, a planar connection can be established between the respective metal band and the textile band, which connection reliably withstands the shear forces that act when the darkening device is operated. The respective metal band is preferably glued to the associated textile band, so that the glued connection is subjected to shear stress when the roller blind is wound or unwound. Accordingly, an adhesive-compatible design can be realized which enables a robust and trouble-free operation of the darkening device.

According to a preferred development, the darkening device has sliding inserts which, with respect to the direction of extension, are arranged on opposite sides within the respective guide channel between the associated guide rail and the associated metal strip. In this way, a support of a respective outer metal strip edge can be set up on the sliding insert and a contribution to a low-resistance and low-noise winding and unwinding of the roller blind can be contributed.

According to a further development of the darkening device, the textile strips each have a guide section which is guided in the guide channel of the associated guide rail, and a connection section which is each coupled to the roller blind web by means of a respective roller blind connection. The respective guide sections and connection sections extend essentially in mutually offset parallel planes when the roller blind web is wound or unwound.

According to a further development, the roller blind is stretched transversely to the pull-out direction, at least during winding and unwinding. Undesired sagging can be avoided particularly effectively in the case of roller blinds that are under great tension. In particular, a considerable improvement in terms of noise emissions during operation of the darkening device is achieved in this way.

Furthermore, according to a further development, the roller blind and the textile strips are preferably coupled to one another in such a way that a predetermined distance is formed between the roller blind and the respective guide rail, so that the roller blind does not come into contact with the guide rails in an operational state of the darkening device. Such a distance adjustment or also height adjustment can, for example, avoid undesired fabric beating. In particular in the case of textile modules that are ultrasonically welded to the roller blind fabric of the roller blind web, the roller blind fabric could otherwise lie very close to the guide rail, harden through the welding process and, for example, hit the guide rail when stimulated by driving profiles in the motor vehicle. Increasing the distance to a sufficient extent contributes significantly to a reduction in noise emissions.

The described embodiments of the darkening device enable, in particular due to the design and arrangement of the textile strips, a reduced-thickness and robust lateral guidance of the roller blind in the guide rails. In addition, bow wave problems in connection with thin blind fabrics can be avoided or at least counteracted. In addition, sewing processes can be saved in that the textile tapes are flatly connected to a respective guide tape, in particular glued or welded. In addition, the darkening device can be manufactured inexpensively in a continuous process with existing systems.

According to a further aspect, a vehicle roof for a motor vehicle is disclosed which has a darkening device according to one of the previously described embodiments, which is coupled to a roof skin of the vehicle roof.

According to a further aspect, a motor vehicle is disclosed which has an embodiment of the vehicle roof described above, which is fixedly coupled to a roof body of the motor vehicle.

Because the vehicle roof and the motor vehicle comprise an embodiment of the previously described darkening device, properties and features of the darkening device are also disclosed for the vehicle roof and the motor vehicle, and vice versa.

• 1 eine schematische, perspektivische Ansicht eines Fahrzeugdachs,
• 2-3 ein Ausführungsbeispiel einer Verdunkelungsvorrichtung für das Fahrzeugdach in einer schematischen Querschnittsansicht, und
• 4 ein weiteres Ausführungsbeispiel einer Verdunkelungsvorrichtung für das Fahrzeugdach in einer schematischen Querschnittsansicht.

In the following, exemplary embodiments of the darkening device are explained with reference to schematic drawings. Show it:

• 1 a schematic, perspective view of a vehicle roof,
• 2-3 an embodiment of a darkening device for the vehicle roof in a schematic cross-sectional view, and
• 4th a further exemplary embodiment of a darkening device for the vehicle roof in a schematic cross-sectional view.

Elements of the same construction and function are identified with the same reference symbols in all the figures. For the sake of clarity, it may be that not all of the elements shown are identified with associated reference symbols in all of the figures.

1 shows a schematic view of a vehicle roof 1 for a motor vehicle that has a lid system 3 having. The vehicle roof 1 is firmly coupled to the rest of the roof body. The lid system 3 is in the vehicle roof 1 integrated and with a roof skin 2 of the vehicle roof 1 coupled. The lid system 3 comprises, for example, a slidable sliding roof cover in order to selectively close or at least partially open a roof opening in the vehicle roof. Alternatively or additionally, the cover system comprises 3 a tightly closed transparent roof element. In this case, an immovable transparent roof element is provided.

The vehicle roof 1 is a blackout device 10 associated with the vehicle roof 1 is coupled and which is set up to allow incidence of light through the cover system 3 if necessary by means of a roller blind 11 to reduce. As below using the 2 until 4th is explained, enables the darkening device 10 a precise and low-noise darkening of a vehicle interior of the motor vehicle and is also particularly flat and inexpensive to manufacture.

The blackout device 10 has a roller blind 11 on, which by means of a winding shaft along a pull-out direction L. can be wound up and unwound. An alternative is the roller blind 11 Can also be wound and unwound without a winding shaft, for example by means of roller springs. The direction of extension L. corresponds in the arrangement according to 1 also a vehicle longitudinal direction of the motor vehicle. The blackout device 10 also includes two guide rails 12th related to the pull-out direction L. are arranged on opposite sides of the roof opening and each one along the extension direction L. extending guide channel 13th have (s. 2 and 4th ).

The blackout device 10 also has two connecting elements in the form of textile straps 14th based on the direction of extension L. on opposite sides of the roof opening on a respective side edge 23 the roller blind 11 are connected. The roller blind 11 is by means of the textile straps 14th on opposite sides when winding or unwinding in the guide channels 13th the guide rails 12th movable along the pull-out direction L. guided and extends between the guide rails 12th such that the textile ribbons 14th on the associated guide rail 12th and out of the respective guide channel 13th out along two deflection areas 21 and 22nd in the direction of the other guide channel 13th are led. The deflection areas 21 and 22nd are set up so that the textile ribbons 14th when winding or unwinding the roller blind 11 based on a cross section transverse to the pull-out direction L. like him in the 2 and 4th is illustrated, are S-shaped.

In this way, the blackout device 10 with a particularly small overall thickness D. be formed in the area of the coil. The total thickness can also be referred to as the pitch and have a value of only 0.4 mm. The state of the blackout device 10 in the wrap is in 3 shown. the 2 and 4th show the blackout device 10 when winding or unwinding the roller blind 11 . Such a total thickness is determined when it is wound up D. by only one layer of the respective textile tape 14th as well as a thickness of one with the textile tape 14th connected metal band 15th .

The blackout device 10 preferably has two metal bands 15th based on the direction of extension L. the roller blind 11 on opposite sides with the respective textile tape 14th are adhesively connected. The metal bands 15th are for guiding the roller blind 11 when winding or unwinding in the respective guide channel 13th the associated guide rail 12th movably mounted. By means of a respective adhesive layer 18th is the respective textile tape 14th at a bottom 27 of the metal band 15th coupled with this. To this Way is a two-dimensional connection between the metal strip 15th and the associated textile tape 14th formed, which is particularly useful for an operation of the darkening device 10 is. The planar connection represents a load on the adhesive coupling on shear, so that a sturdy design of the darkening device that is suitable for adhesive 10 is achievable. Alternatively or additionally, the textile bands 14th by means of sewing and / or welding flat to the metal strip 14th get connected. Alternatively, the metal band 14th can also be designed as a guide band made of plastic.

The textile ribbons 14th are arranged in such a way that they can be used when winding or unwinding the roller blind 11 both a top side 26th as well as the bottom 27 of the associated metal band 15th Cover at least in sections. This is the first turning area 21 above the respective metal band 15th and the second turning area 22nd on an inner edge of the respective metal band 15th educated. In this way, the S-shaped alignment of the textile bands 14th can be achieved, which enables a particularly flat and robust blind guide.

The textile ribbons 14th each have a guide section 24 that is in the guide channel 13th the associated guide rail 12th is performed, and a connection section 25th each by means of a respective roller blind connection 16 with the roller blind 11 is coupled. The respective guide sections 24 and connection sections 25th extend when winding or unwinding the roller blind 11 essentially in mutually offset parallel planes. The blind connection 16 can be done by sewing, welding and / or gluing.

4th shows a further embodiment of the darkening device 10 , which also slide inserts 19th has, based on the pull-out direction L. on opposite sides within the respective guide channel 13th between the associated guide rail 12th and the associated metal band 15th are arranged. In this way, a respective outer metal strip edge can be supported on the sliding insert 19th set up and for a low-resistance and low-noise winding and unwinding of the roller blind 11 be contributed.

The roller blind 11 is on the side in the guide rails 12th guided and extends between these at least when winding and unwinding. The guide rails 12th are preferably with regard to their shape on a reliable and low-resistance guiding of the roller blind 11 and the textile straps attached to it 14th coordinated trained. So show the guide rails 12th in particular a rounded edge in the area of the first deflection area 21 in which the respective textile band 14th in contact with the guide rail 12th comes. Also is the guide channel 13th preferably narrow, so that a controlled and directed guiding of the metal strip 15th and the textile tape attached to it 14th is enabled and also a slipping of the components in the guide channel 13th is counteracted.

The textile ribbons 14th can in particular a predetermined system or support for the respective guide rail 12th form. For example, a partial line system or line support is designed so that the roller blind 11 at least partially in the direction of extension L. along one or more lines on the guide rails 12th in the first deflection area 21 rests. This can be beneficial in terms of friction effects and noise emissions.

The roller blind 11 can be based on the direction of extension L. completely wound up at the rear end. For this purpose, a winding device is provided, for example, which has a winding shaft (also called a roller shaft). The roller blind 11 is rolled up on the winding shaft to form a roller blind, the winding shaft in particular having a winding spring that exerts a tension in the pull-out direction L. on the roller blind 11 to tighten this applies. For pulling out or moving the roller blind 11 is optionally at least one drawbar 17th at a front end of the roller blind 11 provided for operating the roller blind 11 is set up. Alternatively or additionally, the roller blind can 11 can also be operated automatically, for example via an electrical device.

In the context of this description, terms such as “top”, “bottom”, “top”, “bottom” as well as “outside” and “inside” relate to an alignment and orientation of an operational motor vehicle, as it is in 1 is indicated.

The blackout device described 10 enables in particular due to the design and arrangement of the textile bands 14th a reduced-thickness and robust side guide for the roller blind 11 in the guide rails 12th . In addition, bow wave problems in connection with thin blind fabrics can be avoided or at least counteracted. In addition, sewing processes can be saved by using the textile tapes 14th flat with the metal band 15th be glued.

List of reference symbols

1

Vehicle roof

2

Roof skin

3rd

Lid system

10

Blackout device

11

Roller blind

12th

Guide rail

13th

Guide channel

14th

Connection element / textile tape

15th

Metal band

16

Roller blind connection

17th

Draw bow

18th

Adhesive layer

19th

Sliding insert

21

first deflection area

22nd

second deflection area

23

Edge of the roller blind

24

Guide section of the textile tape

25th

Attachment section of the textile tape

26th

Top of the metal band

27

Underside of the metal band

A.

Distance between roller blind and guide rail

D.

Total thickness

L.

Extension direction / longitudinal axis

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 2004430 B1 [0002]

Claims (10)

Darkening device (10) for a motor vehicle, comprising: - a roller blind (11) which can be wound up and unwound along a pull-out direction (L) by means of a winding shaft, - two guide rails (12) which are arranged on opposite sides in relation to the extension direction (L) and each have a guide channel (13) extending along the extension direction (L), and - Two connecting elements (14) which are connected to a respective side edge (23) of the roller blind (11) on opposite sides in relation to the extension direction (L), the roller blind (11) being opened by means of the connecting elements (14) on opposite sides - or unwinding in the guide channels (13) of the guide rails (12) is guided displaceably along the pull-out direction (L) and extends between the guide rails (12) in such a way that the connecting elements (14) rest against the associated guide rail (12) and are guided out of the respective guide channel (13) along two deflection areas (21, 22) in the direction of the other guide channel (13), the deflection areas (21, 22) being set up in such a way that the connecting elements (14) when opening or Unwinding the roller blind (11) are S-shaped in relation to a cross section transverse to the pull-out direction (L). Darkening device (10) according to Claim 1 , in which the connecting elements (14) are each designed as a lateral guide band. Darkening device (10) according to Claim 1 or 2 , comprising: two metal strips (15), which are connected to the respective connecting elements (14) on opposite sides in relation to the extension direction (L) of the darkening device (10) and for guiding the roller blind (11) during winding or unwinding in the respective guide channel (13) of the associated guide rail (12) are slidably mounted. Darkening device (10) according to Claim 3 , in which the connecting elements (14) each cover both an upper side (24) and an underside (25) of the associated metal strip (15) at least in sections when the roller blind web (11) is wound or unwound, so that the first deflection area (21) is formed above the respective metal strip (15) and the second deflection region (22) is formed on an inner edge of the respective metal strip (15). Darkening device (10) according to Claim 3 or 4th , comprising: two sliding inserts (19) which, based on the extension direction (L) of the darkening device (10), are arranged on opposite sides within the respective guide channel (13) between the associated guide rail (12) and the associated metal strip (15). Darkening device (10) according to one of the preceding claims, in which the connecting elements (14) each have a guide section (24) which is guided in the guide channel (13) of the associated guide rail (12), and a connection section (25) which is coupled to the roller blind web (11) by means of a roller blind connection (16), the respective guide sections (24) and connection sections (25) essentially extending in mutually offset parallel planes when the roller blind (11) is wound or unwound. Darkening device (10) according to one of the preceding claims, wherein the roller blind (11) is stretched transversely to the pull-out direction (L) at least during winding and unwinding. Darkening device (10) according to one of the preceding claims, wherein the connecting elements (14) and the roller blind (11) are coupled to one another in such a way that a predetermined distance (A) is formed between the roller blind (11) and the respective guide rail (12), so that in an operational state of the darkening device (10) the roller blind (11) does not come into contact with the guide rails (12). Vehicle roof (1) for a motor vehicle, comprising: a darkening device (10) according to one of the Claims 1 until 8th which is coupled to a roof skin (2) of the vehicle roof (1). Motor vehicle, comprising: a vehicle roof (1) according to Claim 9 , which is fixedly coupled to a roof body of the motor vehicle.

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