DE112007002679B4 - Roller blind arrangement for a motor vehicle - Google Patents

Abstract

Roller blind arrangement for a motor vehicle, comprising a roller blind web (20) which is mounted on a winding shaft (22) which is pretensioned by means of a winding spring (26) in the opening direction of the blind web (20), and on its side facing away from the winding shaft (22) a tension bow (28) is provided, which is guided laterally over a sliding element (30A, 30B) in a guide rail (32A, 32B), wherein the sliding elements (30A, 30B) by means of a drive motor (31) in the guide rails (32A, 32B), with a coupling element (42) being formed on each of the sliding elements (30A, 30B) which interacts with a driver (36A, 36B) which can be moved by means of the drive motor (31) and which is operated by means of a release ramp (62A, 62B) can be switched from a blocking position to a release position in which an operative connection between the sliding element (30A, 30B) and the driver (36A, 36B) is canceled, characterized in that the coupling element (42) is a bistable El ement, which is biased into its two switching positions by means of a spring element (46), which has two directions of action which are dependent on the position of the coupling element (42) with respect to a dead center position.

Description

The invention relates to a roller blind arrangement for a motor vehicle having the features of the preamble of patent claim 1.

A roller blind arrangement known from practice serves, for example, as a shading device for a transparent cutout or area of a vehicle roof and for this purpose comprises a roller blind which is mounted on a tubular winding shaft, which is biased in the opening direction of the roller blind by means of a winding spring. On its side facing away from the winding shaft, the roller blind on a pull bar, which is guided laterally in each case via a sliding element in a guide rail. The sliding elements are movable by means of a drive motor in the respective associated guide rail. In such a roller blind arrangement, the roller blind can be brought only electrically in the closed or open position.

Furthermore, roller blind arrangements for vehicle roofs are known in which a roller blind can be closed and opened in a manual manner. To secure the closed position, a rigid hook is formed on a pull bar, which is arranged on a side facing away from a winding shaft of the roller blind, a rigid hook can be hung on a roof-mounted area of a roof frame. To unhook the hook, an auxiliary mechanism is provided on a handle for opening and closing the blind assembly, which causes a release of the hook from the roof frame. It is also known to arrange corresponding hooks in the region of lateral sliding elements guided in guide rails, to which the drawbar is fastened.

A roller blind arrangement according to the preamble of claim 1 is known from the document DE 10 2004 020 335 A1 known.

The invention has for its object to provide an executed according to the aforementioned type blinds arrangement in which the roller blind remains reversible in an arrangement after the release of an operative connection between the coupling element and the driver, which allows a manual operation of the blind.

This object is achieved by the blind assembly with the features of claim 1.

The essence of the invention consists in the fact that on the sliding elements of Zugspriegels, each guided in a guide rail, a clutch mechanism is formed which couples with an electrical actuation of the roller blind arrangement by means of the drive motor, the sliding elements with the drivers and a manual operation the Sliding elements releases against the drivers. The release position is specified via a corresponding, arranged in the region of the guide rails ramps, which switch the coupling elements in a release position in which an operative connection between the sliding elements and the respective associated driver is repealed. The mechanism for switching the coupling elements is thus integrated into the respective guide rail. A complex operating mechanism in the region of the Zugspriegels is not required.

The roller blind assembly according to the invention is particularly suitable for use in the area of a motor vehicle roof and there for shading a closable by at least partially transparent cover element or at least partially releasable roof opening. Preferably, in this case, the roller blind in the direction of travel, d. H. extendable in the direction of the vehicle front, and the winding shaft is arranged behind the corresponding roof opening. In particular, the roller blind arrangement can also be integrated into a multi-part convertible roof designed as a so-called retractable hardtop (RHT), which is provided with a sunroof in its region arranged above the vehicle front seats.

The roller blind arrangement according to the invention is, as usual, of mirror-symmetrical design with respect to a vehicle longitudinal center plane and therefore comprises mirror-symmetrically mutually formed coupling elements on both sides of the tension bow, which interact with likewise mirror-symmetrical drivers. The drivers can each be connected to a pressure-resistant drive cable, which is driven by the drive motor. As a rule, the drive motor also serves to drive a sunroof cover element, it being possible to provide a coupling mechanism for driving the cover element or the roller blind arrangement.

In the roller blind arrangement according to the invention, the respective coupling element of the sliding elements is a bistable element, which is biased by means of a spring element in its two switching positions, which has two directions of action, which are dependent on the position of the coupling element relative to a dead center. So if the coupling element is pressed by means of one of the ramps over the dead center, it snaps into its release or blocking position due to the spring force of the spring element. The spring element is designed for example as a leaf spring or as a spiral spring.

In a structurally simple to implement and preferred embodiment of the roller blind assembly according to the invention are the Coupling elements, which are provided on the two sliding elements, each formed as a gripping hook, which has a substantially parallel to the pull lever aligned pivot axis. If the gripping hooks are in each case in engagement with one of the drivers, unintentional winding of the roller blind caused by the action of the clock spring is prevented on the winding shaft. The opening and closing is then carried out by driving the drive motor. The release of the gripping hooks from the drivers can be done by simple manual intervention, namely the fact that the Zugspriegel is pushed forward in a manual manner and the gripping hooks arranged on both sides each accrue to the associated guide rail fixed release ramp and are switched from the blocking position to the release position. In the release position, the sliding elements, to which the tension mirror is attached, can then glide backwards through the tension force exerted by the coil spring in the respectively assigned guide rails, without catching on the drivers via the gripping hooks. Thus, a manual opening of the roller blind can be realized in a simple manner.

Conveniently, the coupling elements drive on the respectively associated, vehicle-fixed release ramp for releasing the sliding element relative to the driver in a closed position of the roller blind. The release ramps are thus arranged on the side facing away from the winding shaft of the shadowed by means of the roller blind area. This means that the Zugspriegel still has a slight play in the closing direction in a closed position of the roller blind produced in electrical manner by means of the driving motor acting on the driver, whereby the coupling elements driven by applying a manual force to the Zugspriegel on the respective Freigaberampe and switched to release position can be.

In order to make the switching state of the coupling elements reversible, comprises a purposeful embodiment of the blind assembly according to the invention further guide rails fixed locking ramps, which are each driven over by one of the coupling elements in an open position of the blind to switch from the release position to the respective blocking position.

To couple the sliding elements after a manual opening of the roller blind with the drivers again, the pull can be pulled either manually in the closing direction until the switched by the locking ramp in the blocking position coupling elements engage the arranged at any point of the guide rails drivers. Alternatively, however, the driver can be brought into engagement with the coupling elements by operating the drive motor by moving back into an open position of the roller blind associated position. In a special embodiment of the roller blind according to the invention, the drivers in each case undercut one of the coupling elements which are switched into locking position by means of the locking ramps. These are pressed upwards, without triggering a switchover in the release position.

To rule out that one of the drivers hooked when driving under the respective associated coupling element to this, the drivers preferably each have a ramp on which the relevant coupling element slides along.

In order to exclude faulty circuits, a counter-pressure element acting from above on the coupling element is preferably provided, which prevents the coupling element from switching into the release position when it is driven under the driver. The counter-pressure element thus acts as a dead center.

Furthermore, in the region of each guide rail, a safety locking ramp can be provided, which switches the relevant coupling element in an intermediate position of the tension bow between the closed position and the open position of the roller blind in the blocking position. So that it is not necessary that the towing bar must be moved again in the position associated with the complete opening of the roller blind position, if it was overprinted so far in the closing direction during manual closing, that a switching operation for switching the coupling elements was accidentally triggered by their approach to the release ramps, whereby a coupling of the sliding elements was made impossible with the drivers.

In order to preclude incorrect operation of the roller blind arrangement, the coupling elements can furthermore each be provided with a switching mechanism which reversibly displaces them transversely to the withdrawal direction so that the coupling element does not strike the associated release ramp when the roller blind is pulled out manually from the open position to the closed position , Consequently, no switching is triggered in case of accidental overpressure of Zugspriegels in the closing direction. The switching mechanism preferably displaces the coupling elements in the area of the rear locking ramps, ie when the respective coupling elements are switched into the locked position, in the vehicle transverse direction, so that they no longer align with the front release ramp. A second switching point for displacing the coupling elements in the opposite direction, ie for resetting the coupling elements, can in the area of the front release ramps be arranged, in such a way that the coupling elements, if they were moved forward in the vehicle transverse direction relative to the release ramps in height of the release ramps are set back on their way back before or upon reaching the driver and thus aligned with the front release ramps and through Cooperation with these can be brought into release position.

The switching mechanism is formed for example by two acting in opposite directions transverse ramps, which offset the respective coupling element or the respective gripping hook transversely to the withdrawal direction of the blind. The switching mechanism thus operates in such a way that in a manual retraction of the Zugspriegels in the open position of the roller blind associated position such an offset of the coupling elements takes place that they are no longer aligned with the associated release ramps. If now the roller blind is brought by manual pull on the towing bar in the closed position and this up to the release ramps, the coupling elements do not come into contact with the release ramps. But they get caught while driving back to the respective driver. When re-pulling the Zugspriegels in the closing direction, the coupling elements are offset by the switching mechanism but already in the opposite direction, so that they can ascend on the release ramps and the sliding elements can be moved into one of the open position of the roller blind assigned position, without getting over the coupling elements to get caught on the carriers. Such a switching mechanism can also be formed by so-called switching hearts or a "push-push" mechanism.

Preferably, the sliding element is a plastic injection molded part on which a double stop for the coupling element is integrally formed, which defines the blocking position and the release position of the coupling element designed in particular as a gripping hook. Alternatively, separate stops for the release position and the blocking position of the coupling element may be formed on the plastic injection molded part. It is also conceivable to fix separately produced pins on the sliding element, which form stops for the relevant coupling element.

In order to show a user of the roller blind assembly according to the invention, a switching point at which switch the coupling elements from the blocking position to the release position, elastic buffer elements are provided in an advantageous embodiment of the blind assembly according to the invention, against the respective one of the sliding elements when driving the coupling elements the respective release ramp is pressed. It can also be provided an elastic buffer element against which the towing bar is pressed. The elastic buffer element or the elastic buffer elements is or are each formed, for example, each from a rubber block or the like.

The type of operation of the roller blind assembly according to the invention can be a user by appropriate shaping of an operating handle or a recessed grip, which is arranged in the region of the Zugspriegels.

Further advantages and advantageous embodiments of the roller blind arrangement according to the invention are the description, the drawings and the claims removed.

An embodiment of a roller blind arrangement according to the invention is shown schematically simplified in the drawing and will be explained in more detail in the following description. It shows

1 a top perspective view of a vehicle roof, which is provided with a roller blind assembly according to the invention;

2 a highly schematic view of the roller blind assembly;

3 a perspective view of a sliding member and a driver;

4 a schematic side view of the driver and the sliding member in the coupled state;

5 an interaction of a coupling element with a front ramp;

6 the driver and the slider in the uncoupled state;

7 an interaction of the coupling element with a rear ramp; and

8th an interaction of the coupling element with a dead center.

In 1 is a motor vehicle 10 with a vehicle roof 12 shown with a roof opening 14 is provided by means of a transparent cover element 16 is closable.

For shading the roof opening 14 includes the vehicle roof 12 a roller blind arrangement 18 , in the 2 is shown in isolation. The roller blind arrangement 18 includes a roller blind 20 , which is formed of a flexible, rollable fabric and on a winding shaft 22 aufwickelbar or unwindable from this. The winding shaft includes a winding tube 24 , at which one end of the roller blind 20 is fixed and the means of a trained conventional coil spring 26 biased in the circumferential direction, so that the roller blind 20 automatically on the winding tube 24 can wind up.

At her the winding shaft 22 facing away from the roller blind 20 a extending in the vehicle transverse direction Zugspriegel 28 on, at its lateral end regions each with a sliding element 30A respectively. 30B is provided in a guideway of a roof-fixed guide rail 32A respectively. 32B displaceable in the vehicle longitudinal direction and guided in the vehicle transverse direction without play.

To drive the roller blind arrangement 18 a drive motor 31 on, on two oppositely driven pressure-resistant drive cable 34A and 34B acts, each with a driver 36A respectively. 36B are connected, which also in a guideway of the guide rail 32A respectively. 32B is displaceable in the vehicle longitudinal direction and with the respectively associated sliding element 30A respectively. 30B is detachable.

The sliding element 30B that is mirror-symmetrical to the sliding element 30A is trained in is 3 shown in detail and represents a plastic injection molded part, which has a rear, both sides laterally sliding section 38 and a front one-sided sliding section 40 having. At the guide side of the front sliding portion 40 opposite side is designed as a gripping hook coupling element 42 pivotally mounted, the pivot axis 44 in the vehicle transverse direction, ie substantially parallel to the pull bar 28 Aligned with the the sliding element 30B connected is. The sliding element 30B has a corresponding coupling element 42 on.

The coupling element 42 represents a bistable element, which by means of a spring 46 , which is designed here as a spiral spring, but may also be designed as a leaf spring, can be biased in a blocking position and in a release position, wherein in 3 the blocking position of the coupling element 42 is shown, in which the coupling element 42 for engagement with the driver 36B is positioned with the drive cable 34B connected is. The driver 36B includes for coupling with the sliding element 30B a driver block 48 , on the front end face of an active surface 50 of the coupling element 42 can attack.

The two positions of the coupling element 42 , ie the release position and the blocking position, are each by means of a stop 52 respectively. 54 defined, which at a common, in cross-section triangular serving as a double stop stop pin 56 are formed, which is integral with the injection-molded sliding member 30B is trained.

The coupling element 42 serves to make the blind assembly 18 if necessary, can also be operated manually. For manual operation of the roller blind arrangement 18 is in the area of the Zugspriegels 28 a grip tab 58 educated. For switching the coupling element 42 in its two positions, ie in the release position or in the blocking position, the roller blind has ramps. For switching in the release position are in the range of a front edge 60 of the roof opening 14 in alignment with the respective sliding element 30A respectively. 30B associated coupling element 42 front release ramps 62A and 62B provided, which act such that the respective coupling element 42 when it's on the clearance ramp 62A respectively. 62B ascends, is pivoted from the blocking position to the release position, such as 5 can be seen. The respective coupling element 42 is here by the respective ramp 62A respectively. 62B pressed over a dead center, leaving the spring 46 the coupling element 42 snap into his release position. In this release position of the coupling elements 42 can each assigned sliding elements 30A and 30B not with the respective associated driver 36A respectively. 36B be engaged because the coupling elements 42 when releasing the Zugspriegels 28 or from its grip tab 58 about the respective driver 36A respectively. 36B drive away. By the force of the coil spring 26 So then the sliding elements in the guide rails 32A and 32B move towards the rear of the vehicle and the blind is automatically on the winding shaft 22 wound.

In the area of a rear edge 64 of the roof opening 14 are in the area of the guide rails 32A and 32B from above on the coupling element 42 acting rear ramps 66A and 66B formed, which act as locking ramps and a method of sliding elements 30A and 30B towards the rear, ie towards the rear of the vehicle, the respective coupling element 42 push beyond its dead center so that this due to the force of the spring 46 snaps into its locked position, like 7 can be seen.

The front release ramps 62A and 62B and the rear locking ramps 66A and 66B are each roofproof or guideway trained.

In the area of the rear end position of the driver 30A respectively. 30B is also on each guide rail 32A and 32B one in 8th illustrated dead center fuse 68 formed, which is a pin-like, from above on the coupling element 42 acting projection on the relevant guide rail 32A respectively. 32B is trained. The a counter-pressure element representing dead center 68 serves to make the coupling element 42 if it's from the driver 36A respectively. 36B is driven under, due to the driver 36A respectively. 36B applied pressure not up to the in 8th dashed shown dead center is pressed and accidentally snaps into its release position.

The roller blind arrangement 18 works in the manner described below.

Starting from the in 4 illustrated coupling state between the sliding elements 30A and 30B and the carriers 36A and 36B in which the coupling element 42 with the driver 36A respectively. 36B is engaged and an electromotive actuation of the roller blind assembly 18 by moving the driver 36A and 36B possible, a user can by grasping the grip tab 58 the drawbar 28 Pull in the direction of the front of the vehicle until the coupling elements 42 the sliding elements 30A and 30B on the respectively associated front release ramp 62A respectively. 62B mount up. When driving up the coupling elements 42 on the front release ramps 62A and 62B they are pushed beyond their dead center position, causing them due to the action of the coil spring 46 in through the stop 52 snap defined release position. Now the roller blind can 20 by the action of the coil spring 26 automatically on the winding shaft 22 wind up, with the coupling elements 42 in each case via the respectively associated driver initially remaining in the forward position 36A respectively. 36B drive backwards.

On the way back the coupling elements meet 42 each on one of the rear locking ramps 66A and 66B , which the respective coupling element 42 pushes down beyond the dead center position, so this by the action of the spring 46 snaps into its locked position, like 7 can be seen.

To now the drivers 36A and 36B again to be engaged with the respective associated coupling element 42 , the drivers can 36A and 36B by actuating the drive motor 32 electromotive in the guideways of the guide rails 32A and 32B to the rear under the coupling elements 42 to be moved backwards. Here, the drivers pivot 36A and 36B the respective associated coupling element 42 slightly upward, with the respective dead center 68 prevents the coupling elements 42 snap into their respective release position. When driving under the driver 36A respectively. 36B The coupling elements slide along a rear approach ramp 70 of the respective driver 36A . 36B , After driving under the clutch elements snap back into their through the stop 54 defined locking position back, leaving the driver 36A and 36B in an electromotive method in the direction of the vehicle front on the active surfaces 50 the coupling elements 42 attack and the roller blind 20 take off, leaving the roof opening 14 is shadowed.

LIST OF REFERENCE NUMBERS

10

motor vehicle

12

vehicle roof

14

roof opening

16

cover element

18

The blind assembly

20

blind web

22

winding shaft

24

winding tube

26

Clock spring

28

tension bow

30A, B

Slide

31

drive motor

32A, B

guide rail

34A, B

drive cable

36A, B

takeaway

38

sliding

40

sliding

42

coupling member

44

swivel axis

46

feather

48

pusher

50

effective area

52

attack

54

attack

56

stop pin

58

grip tab

60

front edge

62A, B

front ramp

64

rear edge

66A, B

rear ramp

68

Totpunktsicherung

70

start ramps

Claims (12)

Roller blind arrangement for a motor vehicle, comprising a roller blind ( 20 ), which are connected to a winding shaft ( 22 ) is mounted, which by means of a coil spring ( 26 ) in the opening direction of the roller blind ( 20 ) is biased, and at its the winding shaft ( 22 ) facing away with a pull ( 28 ), which laterally in each case via a sliding element ( 30A . 30B ) in a guide rail ( 32A . 32B ) is guided, wherein the sliding elements ( 30A . 30B ) by means of a drive motor ( 31 ) in the guide rails ( 32A . 32B ) are movable, wherein on the sliding elements ( 30A . 30B ) each have a coupling element ( 42 ) is formed, which with a by means of the drive motor ( 31 ) movable carrier ( 36A . 36B ) and that by means of a release ramp ( 62A . 62B ) is switchable from a blocking position into a release position, in which an operative connection between the sliding element ( 30A . 30B ) and the driver ( 36A . 36B ) is canceled, characterized in that the coupling element ( 42 ) is a bistable element, which by means of a spring element ( 46 ) is biased in its two switching positions, which has two directions of action, which are dependent on the position of the coupling element ( 42 ) against a dead center position. Roller blind arrangement according to claim 1, characterized in that the coupling element ( 42 ) is a gripping hook which is parallel to the Zugspriegel ( 28 ) aligned pivot axis has. Roller blind arrangement according to one of claims 1 to 2, characterized in that the coupling element ( 42 ) in a closed position of the roller blind ( 20 ) for releasing the sliding element ( 30A . 30B ) opposite the driver ( 36A . 36B ) at the release ramp ( 62A . 62B ) ascends. Roller blind arrangement according to one of claims 1 to 3, characterized by a locking ramp ( 66A . 66B ), which the coupling element ( 42 ) for switching to a blocking position in an open position of the roller blind ( 20 ) passes over. Roller blind arrangement according to one of claims 1 to 4, characterized in that the driver ( 36A . 36B ) by returning to an opening position of the roller blind ( 20 ) associated position in engagement with the coupling element ( 42 ) can be brought, wherein the switched in blocking position coupling element ( 42 ) is run over and this by the driver ( 36A . 36B ) is pressed up without triggering a switching operation. Roller blind arrangement according to claim 5, characterized in that the driver ( 36A . 36B ) a starting ramp ( 70 ), on which the coupling element ( 42 ) slides in the underride. Rolloanordnung according to claim 5 or 6, characterized by a from above the coupling element ( 42 ) acting counter-pressure element ( 68 ), which prevents the coupling element ( 42 ) in the release position, when it is in the locked position and by the driver ( 36A . 36B ) is driven under. Roller blind arrangement according to one of Claims 1 to 7, characterized by a safety locking ramp which holds the coupling element ( 42 ) in an intermediate position of the Zugspriegels ( 28 ) between the closed position and the open position of the roller blind ( 20 ) in locked position switches. Roller blind arrangement according to one of claims 1 to 8, characterized in that the coupling element ( 42 ) is reversibly displaceable transversely to the withdrawal direction by means of a switching mechanism, so that the coupling element ( 42 ) when manually pulling out the roller blind ( 20 ) from the open position to the closed position in a projection parallel to the guide rails next to the release ramp ( 62A . 62B ) lies. Roller blind arrangement according to claim 9, characterized in that the switching mechanism is formed by two acting in opposite directions transverse ramps. Roller blind arrangement according to one of claims 1 to 10, characterized in that the sliding element ( 30A . 30B ) is a plastic injection molded part, on which a double stop ( 56 ) for the coupling element ( 42 ) is formed, which the blocking position and the release position of the coupling element ( 42 ) Are defined. Roller blind arrangement according to one of claims 1 to 11, characterized by an elastic buffer element against which the sliding element when driving the coupling element ( 42 ) is pressed on the release ramp.

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