DE102006049065A1 - Manually actuatable roll-up window shade for motor vehicle, has two drive gears arranged at ends of wind-up shaft, where each drive gear is allocated to respective one of push elements - Google Patents

Abstract

The shade has a rotatably supported wind-up shaft (36) with two ends, and a shade element (22) with an edge fixed to the wind-up shaft. A pull rod (23) is connected to one of ends of the shade element remote from the wind-up shaft. Two guide rails (26, 27) guide the pull rod extended on opposite sides of the shade element when the shade element is in an extended position. Two drive gears (47, 48) are arranged at the ends of the wind-up shaft, where each drive gear is allocated to a respective one of push elements (38, 39). A tensioning mechanism maintains tension in the shade element.

Description

Out The prior art, for example, rear window blinds are known which are electrically driven. These window blinds according to the state of Technique have a below the hat rack rotatably mounted winding shaft on, with which the roller blind is attached with an edge. The other Edge is connected to a tie rod, the end in guide rails guided is. The guide rails run next to the side edges of the rear window, starting from the parcel shelf or below, until in the vicinity the upper edge of the window. To bias the roller blind, sitting in the Usually in the winding shaft or next to a spring motor through which the Winding shaft is biased in the winding direction of the roller blind.

The Unwinding or clamping of the roller blind is done with the help of band-shaped Actuators, in the groove chamber of the guide rails are guided ausknicksicher. To drive the actuators is a common geared motor provided, in addition to the winding shaft approximately at the level of the Middle lies. To the geared motor with the lower ends of the guide rails to connect are guide tubes provided, which terminate at the transmission housing of the geared motor. With the help of these guide tubes become the actuators between the drive motor and the guide rails ausknicksicher led with it they can perform the push function.

There for reasons of space the engine is relatively tight sitting next to the winding shaft, the guide tubes are approximately in the vicinity of the geared motor parallel to the winding shaft and need at the guide rails be deflected in a direction perpendicular to the winding shaft. Again for space reasons is the radius of curvature the guide tubes next to the junction in the guide rails comparatively very tight. Force these installation conditions an actuator, which is equally flexible in all directions. The guide grooves this is why be undercut to ensure a kink-proof leadership.

The undercut guide grooves complicate the installation of the tension rod. The guide links of the tension rod can only from the ends of the guide rails introduced become.

Further the production of undercut guide rails is difficult and / or consuming, especially if these with side trim parts or the headliner one piece should be and sprayed or injected with these together should be.

The Difficulty of the known arrangement has been previously in connection described with a rear window blind. Basically similar difficulties arise in roof window roller blinds which are driven in a comparable manner become.

outgoing It is an object of the invention, a window blind for motor vehicles to create, in which the assembly is simplified.

These Task is window blind according to the invention for motor vehicles solved, having the features of claim 1.

The new window blind for Motor vehicles has a rotatably mounted winding shaft with two ends on. At the winding shaft, the roller blind is attached with an edge. Another edge of the roller blind, which lies off the winding shaft, is connected to the tie rod. To guide the tension rod are two guide rails provided, which run on both sides of the clamped roller blind. Each of the two guide rails contains a guide groove that unlike the acquaintance is free of undercuts. In the guide rails run band-shaped Actuators, which have the purpose to move the pull rod or movements of the To transfer tension rod. The actuators have a rectangular cross-section, whose thickness to the width of the guide groove is adjusted. The actuators carry on a flat side a toothing, on which they can be driven positively are.

There the actuators have a rectangular cross-section, they are parallel in direction sufficient to the plane of the unfolded roller blind from home kink-resistant to transmit compressive forces to be able to without them laterally from the undercut-free guide grooves can buckle. On the other hand, they are flexible in the direction perpendicular to to be able to easily cling to the two drive gears, with which they are drivingly positively coupled. Or to be stowed in places that are off the line have a different course. With the actuators can so at least a pushing power transmission between the drive wheels and the tie rod.

The operation of the window blinds can be done manually, wherein an arrangement can be used, as shown in the DE 10 2006 046 065 and the DE 10 2006 046 064 is described in detail.

at an electrically operated Window roller blind is provided an electric drive device which For example, it can be connected to the winding shaft. Another possibility consists of the drive gears to couple with the electric drive device.

Electric drive devices for such a roller blind are in the DE 10 2006 046 069 explained in detail.

The new arrangement leaves also for use such window blinds, in which the side edges of the blind not parallel to each other. For this purpose, a tie rod is needed variable length is.

Cheap management conditions can are achieved when the guide rails one evening nearby start the winding shaft.

The guide rails can, depending on the shape of the window, parallel or converging to each other be arranged.

Conveniently, is the band-shaped actuator flat rectangular in such a way that the dimensions in thickness directions may be smaller by a factor of 2 or more than in width directions of the cross-sectional profile.

The Drive gear may be a spur gear when the Guide rails in right angle to the axis of rotation of the drive gear. If the guide rails are at an angle to the axis of rotation, the drive gear is with a helical teeth provided such that the tooth line of the tooth is perpendicular to the longitudinal axis the guide rail lies.

The Drive gears can be arranged coaxially with the winding shaft and the drive motor can be coupled with the winding shaft.

Between the drive gears and the winding shaft can be inserted spring elastic compensating means. The balancing means are in the simplest case helical or spiral springs.

The conditions are very space-saving, if the spiral spring in a recess the drive gear is seated.

Around the slack side of each actuator is polluted and damage-proof to stow in the vehicle is for each actuator a storage tube available. The storage tube may expediently made of a flexible material. It can be round.

Incidentally, are Further developments of the invention Subject of dependent claims.

The The following description of the figures is limited to the explanation the for the understanding essential aspects of the invention. It is clear that a number of modifications are possible. Smaller, not described details, the expert in the usual Refer to the drawings, the extent that the description of the figures complete.

The Subsequent drawings are not necessarily to scale. to An illustration of the essential details may be that certain areas are exaggerated shown big are. Furthermore The drawings are simplified and do not include each one in the practical execution possibly existing detail.

In the drawing are embodiments of the Subject of the invention shown.

1 shows a broken fund section of a car in a perspective view;

2 shows the basic structure of the rear window roller blind of the vehicle 1 ;

3 shows a cross section through one of the guide rails together with a portion of the guide members, in a perspective view; and

4 illustrates the connection between one of the drive gears and the winding shaft on the basis of a simplified perspective Eplosionsdarstellung.

1 FIG. 12 illustrates the broken-off, cut-off rear region of a car. The figure illustrates a view of the right inner side, which is a mirror image of the broken-away left inner side. Unless otherwise stated, the explanations on the right-hand side of the body apply mutatis mutandis to the left-hand body side. The illustration is simplified, for example, body inner structures, such as stiffeners and fasteners are not shown, since the representation for the understanding of the invention is not required.

The illustrated body section 1 has a roof 2 on, from the side a C-pillar 3 down to a floor group, not shown leads. A corresponding C-pillar would be conceivable on the broken-off side of the vehicle. The C-pillar 3 is on the inside with a panel 4 Mistake.

The roof 2 goes at its trailing edge into a rear window 5 over at the top of a window top 6 is limited. From the side edges, which are mirror images of each other, is only a section 7 to recognize that at a corner area 8th in the upper edge of the window 6 passes.

The width of the rear window 5 is on the Height of the waistline of the body is greater than in the area of the upper edge of the window 6 , At a distance in front of the C-pillar 3 there is a B-pillar 9 , in a known manner, a rear right side door 11 hinged. The right rear side door 11 contains a pane 12 by a vertical strut 13 in a substantially quadrangular section 14 and an approximately triangular section 15 is divided.

To the interior also includes a rear seat 15 with a back seat 16 and a rear seat back 17 , The rear seat surface 17 lies on a floor group 18 on.

Between the rear upper edge of the rear seat backrest 17 and the rear window 5 extends a hat rack 19 ,

The rear window 5 is with a rear window roller blind 21 provided, of which only in 1 a roller blind 22 can be seen. Further blinds are located at the side window 12 , in the quadrangular window section 14 a roller blind 23 and in the triangular section 15 a runway 24 ,

The drive type of roller blinds 23 and 24 corresponds to the drive type of the rear window roller blind 21 , which is why it is sufficient to explain only its structure in detail.

According to 2 belong to the rear window blind 21 two side of the rear window 5 running guide rails 25 and 26 ,

The guide rails 25 and 26 are arranged in mirror image to each other and follow the course of the side edge of the rear window 5 , Deviating from the illustration in 2 They may be more or less strong towards the roof 2 converge.

Because the two guide rails 25 and 26 are equal to each other, the explanation of the inner structure of the guide rail is sufficient 26 , The explanation applies mutatis mutandis to the guide rail 25 ,

According to 3 is located in the guide rail 26 there is an undercut-free guide groove 27 whose profile is simply flat rectangular. The guide groove 27 is made up of two parallel side walls 28 . 29 as well as a groove bottom 30 limited and opens through a slot 31 outward.

The two guide rails 25 and 26 serve to a pull rod 32 to lead, at the edge of the blind 22 is attached. The tension rod 32 is composed of a center piece, in which two end pieces 33 and 34 are guided telescopically. The middle piece sits, for example, in one of the roller blind 22 trained tubular loop. The two tails 33 . 34 are by springs 35 elastically outward towards the guide rail 25 . 26 biased.

Each of the two end pieces 33 . 34 carries at its free end a slider 36 sitting. The tails 33 . 34 are sized in cross section so they play with in the guide groove 27 fit. The cross section of the slider 36 is at the cross section of the guide groove 27 adapted, for example, is flat rectangular.

That of the tie rod 32 remote end of the roller blind 22 is on a winding shaft 37 attached.

A drive device 38 serves to the roller blind 22 between the extended position, in front of the rear window 5 is spread out to transfer to a retracted position in which the pull rod 32 either on the hat rack 19 rests or withdrawn through the existing slot there.

To the drive device 38 include two band-shaped flexurally elastic actuators 39 and 40 , which are also the same. Each of the actuators 39 . 40 has a flat rectangular cross-section, with the two flat sides 41 and 42 , The flat side 42 carries a gearing 43 , This results in one-sided toothed flexible-elastic toothed rack. The thickness of the racks 39 . 40 corresponds to the clear width of the guide groove 27 , As a result, the two actuators 39 . 40 in their associated guide rails 25 and 26 in the direction perpendicular to the plane of their flat sides 41 . 42 guided ausknicksicher. Since they have a better moment of inertia in the direction perpendicular thereto, they can actuation forces on the tension rod 32 transfer. Due to their shape, they can not be sideways through the slot even under pressure 31 buckle. For better guidance, the actuators 39 . 40 end with the associated slider 36 be connected.

To the drive device 38 also includes a geared motor 43 , whose output shaft 44 rigid with the axle journal 45 the winding shaft 36 connected is.

On the two stub axles 45 and 46 each sits a spur gear 47 respectively. 48 on the outer peripheral surface with a toothing 49 is provided, which is a positive engagement with the respective associated actuator 39 . 40 allowed. By not further illustrated means, the two actuators 39 . 40 in radi aler direction against the associated drive gear 47 . 48 pressed, so that the intervention always remains. The actuators 39 . 40 lie on the same side relative to the axis of rotation on the associated drive gear 47 . 48 on, on the roller blind 22 from the winding shaft 37 expires.

The gear 47 is on the axle journal 45 rotatably mounted. The same applies analogously to the gear 48 on the axle journal 46 , The kinematic connection via which a drive torque is transmitted is in 3 illustrated in detail. The description given there applies mutatis mutandis to both drive gears 47 and 48 ,

The drive gear 47 has a disk-like shape with the straight spur toothing 49 , the form-fitting with the teeth 43 of the respective actuator 39 . 40 interacts.

Coaxial to the toothing 49 contains the gear 47 a cup-shaped turnout 52 , in concentric a bearing bore 53 is included with the gear 47 on the axle journal 45 is rotatably mounted. The turns 52 forms a spring housing for a coil spring 54 which provides a torsionally flexible connection between the journal 45 and the gear 47 manufactures. For this purpose, the axle journal 45 in the appropriate place with an upturned nose 56 provided as a repository for an opening provided at the inner end of the spring 57 serves. The outer spring end also includes an opening 58 that is form-fitting with a nose 59 connectable to the outer peripheral surface of the recess 52 pointing radially inwards.

As can be seen from the later functional description, performs with appropriate dimensioning of the effective diameter of the gear 47 , related to the bale, the wound up roller blind 22 on the winding shaft 37 forms, a relative rotation with respect to the winding shaft 37 , The degree of this relative rotation is about a maximum of one revolution. This can be a spiral spring 54 be used, which has a relatively short effective path.

The representation in the figures is not to scale. Rather, this is about explaining the essence of the drive concept. The relevant values for the design of the guide rails 25 and 26 and the resulting outer diameter of the two flexible flexible actuators 39 . 40 are known from practice.

For completeness, it should be mentioned that from the point of view of the respective guide rail 25 . 26 on the opposite side of the gear in question 47 . 48 a flexurally elastic storage tube 61 respectively. 62 located, which is largely laid free according to the spatial conditions in the vehicle.

The measures that are taken to the storage pipes 61 and 62 Since they are not important to the understanding of the invention, not shown. Likewise, for example, missing any existing housing, the gear 47 respectively. 48 surrounds and that for the passage of the associated flexurally elastic actuator 38 . 39 contains a corresponding tangential bore.

The operation of the arrangement shown is as follows:
It is assumed here that initially the blind 22 completely, ie as far as possible, on the winding shaft 37 is wound up. In the wound state are the in the two gears 47 . 48 contained coil springs 54 slightly biased. Due to the bias are the thus engaged and thus positively coupled actuators 39 and 40 elastic in the direction of the two sliders 35 of the tension rod 32 biased and are there on. The preload force of the coil springs 54 holds the roller blind 22 between the winding shaft 36 and the tie rod 32 streamlined. The feathers 35 push the sliders 36 and the ends of the band-shaped actuators coupled thereto 39 . 40 against the groove bottom 30 ,

If the user, starting from this position, the rear window blind 21 he wants to extend, he sets the geared motor via an electrical switch 43 in progress. The running geared motor 43 turns the winding shaft 37 together with the two rotatably coupled axle journals 45 and 46 in the direction of unwinding the roller blind 22 from the winding shaft 37 ,

The two drive gears move in the same direction of rotation 47 and 48 , Since their effective diameter with the outer diameter of the bale on the winding shaft 37 coincides when the shade 22 is completely wound according to the open roller blind, move first, the two actuators 39 and 40 at exactly the same speed as the tension bar 32 , ie the movable leading edge of the roller blind 22 ,

With unwinding of the roller blind 22 decreases the bale present on the winding shaft. Per revolution of the winding shaft 37 Consequently, less roller blind is released, as with rigid coupling with the same angular rotation, the two flexurally elastic but thrust-resistant actuators 39 . 40 would go back.

Because of the rigid coupling with the roller blind 22 they are forced to run at the same speed as the roller blind 22 which, in consequence, causes the rotational movement of the two drive gears 47 and 48 relative to the rotational movement of the winding shaft 37 is retarded. This will cause the coil spring 54 , similar to a clockspring, raised more.

Depending on the dimensioning length and length of the extension stroke, however, the degree of relative rotation is limited to approximately one revolution between the winding shaft 37 and the drive gear 47 respectively. 48 ,

At the conclusion of the extension movement, when the tension rod 21 arrived at the upper edge of the window, thus the fabric tension in the blind 22 be a bit bigger than at the beginning.

The retraction of the roller blind is done analogously in the reverse direction, with the two coil springs 54 relax again by the appropriate amount. At the end of the retraction movement is the tension rod 31 again on the hat rack 19 on, with the remaining residual stress in the two coil springs 54 for the required cloth tension in the roller blind 22 provides. Because the coil springs 54 Equally dimensioned on both sides, act on both ends of the same forces on the tension rod 31 ,

Since the drive effect directly at the foot of the two guide rails 25 and 26 is initiated, no complicated deflections are required to the two actuators 39 . 40 to bring to a common drive source. Each actuator 39 . 40 has its own power source, which is placed so that a minimum deflection of the actuator 39 . 40 starting from the perfectly straight straight course, is required. As a result, the friction decreases enormously compared to the solutions of the prior art. Also the storage pipes 61 and 62 Run largely straight and, since they are flexible, they can be installed anywhere in the vehicle.

As the arrangement shown can also be seen, the two actuators 39 and 40 in the area of the working strand, ie between the tension rod 32 and the respective drive gear 47 . 48 subjected to pressure, which also applies to manual operation via the tie rod. Although this pressure load may possibly lead to the full length of the workstring that the respective actuator 39 . 40 endeavors, perpendicular to the side walls 28 . 29 the guide groove 27 buckling. At a buckling, the respective actuator 39 . 40 however, through these two rigid sidewalls 28 . 29 prevented.

The special shape of the flat, band-shaped actuator 38 . 40 However, it is sufficient to independently on the entire length of Arbeitstrums a lateral buckling, without the aid of the guide rails 25 . 26 , to prevent.

In order to become undercut guide grooves, dispensable as known from the prior art. undercut Have guide grooves the big one Advantage that it is possible without any particular difficulty such guide grooves, for example also to be injected in side trim parts of the motor vehicle. Under side trim parts here are also sections of the headliner be understood.

The Simplification arises because undercut-free parts without easy to demould further on an otherwise not straight course are.

A further improvement in buckling strength in the direction parallel to the plane of the clamped roller blind 22 arises when the respective actuator 38 . 40 is sandwiched. For example, it is like 3 shows, from one the gearing 43 carrying elastomeric layer and a forming the back of spring steel strip 64 , The spring steel strip can be very thin, so that, for example, it is also readily possible to realize a slightly screwed course. It is flat in the transverse direction, d. h the generator is a straight line.

If the two guide rails 25 and 26 not like in 2 shown parallel but at an angle to each other, it is sufficient if the teeth on the two gears 47 . 48 something obliquely runs such that the axis of the guide rail 25 . 26 perpendicular to the tooth-line is that tooth, with the respective actuator 39 . 40 engaged.

The of the gears 47 . 48 distal ends of the working strut of each actuator 39 . 40 are inevitably by the spring-loaded end pieces 33 . 34 in the guide groove 27 held.

The The invention has been explained by way of example with reference to a rear window roller blind. It However, it is readily apparent that the invention is in the form of the flat actuators in conjunction with undercut-free guide grooves also on side window roller blinds and roof window blinds is applicable.

A window blind for motor vehicles has laterally of the clamped roller blind guide rails. These guide rails contain undercut-free guide grooves. To over Wear the forces between the tension rod and the drive device band-shaped actuators are used. These are prevented by the guide rails at a buckling perpendicular to the roller blind plane. At buckling in the direction parallel to the roller blind plane, they are inherently, ie prevented from coming from the outside help by their shape.

Claims (21)

Window blind ( 21 ) for motor vehicles, with a rotatably mounted winding shaft ( 36 ), which has two front ends, with a roller blind ( 22 ), with one edge on the winding shaft ( 36 ) is attached, with a tension rod ( 32 ), which at one of the winding shaft ( 37 ) edge lying with the roller blind ( 22 ) connected is. with two guide rails ( 25 . 26 ), which are located on both sides of the opened roller blind ( 22 ) and each of which is used to guide the tension rod ( 32 ) an undercut-free guide groove ( 27 ), with two band-shaped actuators ( 39 . 40 ), of which one of the one guide rail ( 25 . 26 ) and the other of the other guide rail ( 25 . 26 ) assigned by the guide rails ( 25 . 26 ) are guided, both of which have a rectangular cross section, the thickness of the width of the guide groove ( 27 ), of which both have a toothing ( 42 ) and both with the tie rod ( 32 ), with two drive gears ( 47 . 48 ), one of which is the one actuators ( 39 . 40 ) and the other the other actuator ( 39 . 40 ) is assigned and at the front ends of the winding shaft ( 37 ) are arranged, wherein the actuators ( 39 . 40 ) kinematically between the drive wheels ( 47 . 48 ) and the tension rod ( 32 ) lie. Window roller blind according to claim 1, characterized in that a drive device ( 38 ) is present at least for the winding shaft. Window roller blind according to claim 2, characterized in that a drive device ( 38 ) at least for the drive gears ( 47 . 48 ) is available. Window roller blind according to claim 1, characterized in that the tension rod ( 32 ) is variable in length. Window roller blind according to claim 1, characterized in that the guide rails ( 25 . 26 ) at one end near the winding shaft ( 37 ) kick off, Window roller blind according to claim 1, characterized in that the guide rails ( 25 . 26 ) parallel or converging to each other. Window roller blind according to claim 6, characterized in that in the guide groove ( 27 ) the respective actuator ( 39 . 40 ) is guided ausknicksicher in the direction perpendicular to the clamped roller blind. Window roller blind according to claim 1, characterized in that the actuating member ( 39 . 40 ) is flat-rectangular in cross-section, with a flat side of the toothing ( 42 ) wearing. Window roller blind according to claim 1, characterized in that the actuating member ( 39 . 40 ) has a sandwich construction with a back made of spring steel strip ( 41 ). Window roller blind according to claim 1, characterized in that the drive gear ( 47 . 48 ) is a spur gear. Window roller blind according to claim 1, characterized in that the drive gear ( 47 . 48 ) has a helical toothing such that the longitudinal direction of a tooth connected to the actuator ( 39 . 40 ) is engaged, perpendicular to the longitudinal axis of the guide rail ( 25 . 26 ) runs. Window roller blind according to claim 1, characterized in that the two drive gears ( 47 . 48 ) with the winding shaft ( 37 ) are connected. Window roller blind according to claim 1, characterized in that the two drive gears ( 47 . 48 ) coaxial with the winding shaft ( 37 ) are arranged. Window roller blind according to claim 1, characterized in that the drive motor ( 43 ) with the winding shaft ( 37 ) is coupled. Window roller blind according to claim 1, characterized in that compensating means ( 54 ) between the drive gears and the winding shaft ( 37 ) are arranged. Window roller blind according to claim 15, characterized in that the compensating means of a spiral spring ( 54 ) are formed. Window roller blind according to claim 16, characterized in that the spiral spring ( 54 ) in a recess of the drive gear ( 47 . 48 ) sits. Window roller blind according to claim 1, characterized in that means are provided which are adapted to the respective actuator ( 39 . 40 ) with its associated drive gear ( 47 . 48 ) engage. Window roller blind according to claim 1, characterized in that for each drive gear ( 47 . 48 ) a separate gear housing is provided. Window roller blind according to claim 1, characterized in that for each actuator ( 39 . 40 ) own storage tube ( 61 . 62 ) is present, which, when the window blind is retracted, the slack side of the actuator ( 39 . 40 ). Window roller blind according to claim 20, characterized in that the storage tube ( 61 . 62 ) consists of a flexible material.