Wind deflector and open roof construction provided therewith

A wind deflector is described for use at the leading end of a roof opening in the roof of a vehicle, which wind deflector is movable between a retracted position in which it substantially is positioned in a recess below the level of the upper surface of the roof and an extended position in which it at least partially extends above said level, and which wind deflector comprises a movable upper frame part, a lower frame part and a mesh material having an upper edge region attached to the upper frame part and a lower edge region attached to the lower frame part. The lower frame part together with the lower edge region of the mesh material is movable between a retracted position below said level and an extended position above said level.

BACKGROUND OF THE INVENTION

The invention firstly relates to a wind deflector for use at the leading end of a roof opening in the roof of a vehicle, which wind deflector is movable between a retracted position in which it substantially is positioned in a recess below the level of the upper surface of the roof and an extended position in which it at least partially extends above said level, and which wind deflector comprises a movable upper frame part, a lower frame part and a mesh material having an upper edge region attached to the upper frame part and a lower edge region attached to the lower frame part.

In a known wind deflector of this type (see, for example, DE-C-10137363, EP-A-1342600 or DE-A-19518696) the lower frame part is attached to a stationary roof part of the vehicle or is defined by such a stationary roof part of the vehicle, such as a front beam of an open roof construction provided with a wind deflector. The position of such a lower frame part makes assembling the wind deflector difficult. Especially, it is very difficult to attach the lower edge region of the mesh material to such a lower frame part. When the mesh material is flexible, it often appears that after assembling folds are present in the mesh material which are difficult to remove.

Further it appears, that the state of the art wind deflectors of the type referred to above provide a flow pattern of the air flowing around the Further it appears, that the state of the art wind deflectors of the type referred to above provide a flow pattern of the air flowing around the wind deflector which is not versatile, and which cannot cope with differing circumstances in which the wind deflector has to perform.

SUMMARY OF THE INVENTION

Thus, it is an object of the present invention to provide an improved wind deflector.

Thus, in accordance with the present invention there is provided a wind deflector for use at the leading end of a roof opening in the roof of a vehicle, which wind deflector is movable between a retracted position in which it substantially is positioned in a recess below the level of the upper surface of the roof and an extended position in which it at least partially extends above said level, and which wind deflector comprises a movable upper frame part, a lower frame part and a mesh material having an upper edge region attached to the upper frame part and a lower edge region attached to the lower frame part, wherein the lower frame part together with the lower edge region of the mesh material is movable between a retracted position below said level and an extended position above said level.

When the wind deflector in accordance with the present invention has to be assembled, the lower frame part is moved towards its extended position above the level of the upper surface of the roof. As a result the lower frame part becomes very accessible such that the lower edge region of the mesh material can be attached thereto without any problem. Further, the position of the lower frame part, and thus the position of the upper frame part and mesh material extending therebetween, can be adapted to cope with different circumstances in which the wind deflector has to perform. Basically, any position of the wind deflector between the fully retracted position, a partly extended position in which the lower frame part still is positioned below said level, and a fully extended position in which both the upper frame part, mesh material and lower frame part are positioned above said level, can be chosen freely. In the first mentioned position (fully retracted) the wind deflector is not operative. In the second mentioned position (partly extended) the wind deflector basically functions as a state of the art wind deflector of the type referred to above, in which the main air flow is directed above the upper frame part with a smaller, secondary air flow through the mesh material, whereas in the third position (fully extended) also an additional air flow below the lower frame part can be generated, promoting the characteristics of the wind deflector (especially its noise-preventing characteristics).

It is noted, that DE-C-10137363 already shows a wind deflector having a movable upper frame part and a movable lower frame part. However, the lower frame part of this known wind deflector cannot be compared with the lower frame part of the present wind deflector, because in this state of the art wind deflector the lower edge region of the mesh material is not attached to said lower frame part, but still to a stationary roof part of the vehicle.

In a preferred embodiment of the wind deflector according to the present invention the upper frame part is pivotable around a first axis extending transversally with respect to the vehicle, whereas the lower frame part likewise is pivotable around a second axis extending transversally with respect to the vehicle. In such an embodiment, the wind deflector is of the pivoting type. However, this does not preclude the possibility that the wind deflector is provided with a mechanism for realising a pure translational motion between its fully extended and fully retracted positions or translational motion with pivoting.

When the wind deflector is of the pivoting type as mentioned above, preferably the first and second pivot axes coincide. That means, that only one pivot axis extending transversally is provided. This makes the mechanism of the wind deflector less complicated, cheaper and more reliable.

The upper and lower frame parts may have a very simple construction. For example, in a top plan view of the vehicle the upper and lower frame parts are shaped as U-shaped bars having their outer ends positioned at the first and second pivot axes, respectively.

Preferably, the upper frame part is spring-loaded towards its extended position. Only when being released (for example by a movable closure means of an open roof construction provided with such a wind deflector) it will move from the retracted position towards the extended position. Generally, firstly the upper frame part will move towards an extended position, and after a short while also the lower frame part will move towards an extended position, during which the upper frame part continues its movement towards its fully extended position.

The spring-load on the upper frame part can be generated by a first spring member acting between the upper frame part and a stationary roof part of the vehicle. For example, such a spring member comprises a torsion spring or a compression spring.

The spring-load on the lower frame part can be generated by a second spring member acting between said lower frame part and the upper frame part. Again, such a spring member may comprise a torsion spring or a compression spring.

Although in the above a wind deflector has been mentioned, in which a relative movement between the upper frame part and lower frame part will occur, this is not strictly necessary. Thus, it is also possible that the relative position between the upper and lower frame parts is fixed, in which situation the mesh material can be rigid. However, a disadvantage of such a construction is, that the recess for housing the wind deflector in its fully retracted position should be deeper then in the case of a wind deflector, in which the upper frame part and lower frame part can move relative to each other, such that in the fully retracted position of the wind deflector the upper and lower frame parts are positioned at a short distance from each other.

For increasing the effect of the wind deflector, preferably the mesh material has a main portion extending transversally with respect to the vehicle, and two sub portions at the opposite outer ends of the main portion extending substantially longitudinally with respect to the vehicle. The two sub portions contribute to the creation of a favourable flow pattern around the wind deflector and above the roof opening in the stationary roof of the vehicle.

The invention secondly relates to an open roof construction or roof assembly for a vehicle, comprising a roof opening defined in the roof of the vehicle, which roof opening can be opened and closed by a movable closure means, wherein in front of said roof opening a wind deflector according to the present invention is positioned.

DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS

Firstly, reference is made toFIG. 1. In a stationary roof1of a vehicle2a roof opening3is provided which can be closed and opened by a roof assembly having a movable closure means4that can include, but not be limited to a panel/folding roof4A operably connected to a drive motor or hand crank4B via cables4C. The panel/folding roof4A and/or lift mechanism connected thereto can slide on stationery guide1A. The foregoing elements are schematically illustrated since they are well known to those skilled in the art.

At the leading end of the roof opening3a wind deflector5is provided. The wind deflector5is of the type which is movable between a retracted position in which it substantially is positioned in a recess6(seeFIGS. 3 and 4) below the level of the upper surface of the roof1and an extended position in which it at least partially extends above said level.

Referring toFIG. 2, the wind deflector5comprises a movable upper frame part7, a lower frame part8and a mesh material9having an upper edge region attached to the upper frame part7and a lower edge region attached to the lower frame part8.

The upper and lower frame parts7,8are shaped as U-shaped bars having their respective outer ends30and31pivotally positioned at respective pivot axes10and10′ extending transversally with respect to the vehicle, and wherein the upper and lower frame parts7and8being pivotally secured to portions of the roof1forming the recess directly or indirectly through an intermediate member (schematically illustrated inFIG. 2at10a)

A first spring member11is acting between the upper frame part7and a stationary part of the roof1, and tries to urge the upper frame part7towards its fully extended position. Such a first spring member11can be positioned at both lateral sides of the wind deflector5.

A second spring member12is positioned and acts between the upper frame part7and lower frame part8, such as to urge the upper and lower frame parts7and8apart.

As is clearly visible inFIG. 2, the mesh material has a main, central, portion extending transversally with respect to the vehicle, and two sub portions at the opposite outer ends of the main portion extending substantially longitudinally with respect to the vehicle.

The wind deflector functions as follows.FIG. 3ashows the closure means4in a fully closed position, in which it urges the upper frame part7against the spring-load of the first spring member11towards the lower frame part8into the recess6. The mesh material9has assumed a collapsed position. Now, the wind deflector5is in its fully retracted position.

In one embodiment, movement of the wind deflector5is co-ordinated with movement of the closure means4. Pusher28is illustrated as an exemplary mechanism for controlling movement of the wind deflector5or parts thereof (herein by selectively engaging the wind deflector5by riding upon the upper frame member7). Pusher28can be operably coupled with linking members to elements of the closure means4such as the lift mechanism or the panel4A. Alternatively, a separate drive motor can be operatively coupled to the wind deflector5or pusher28. As appreciated by those skilled in the art, other types of mechanisms could be used. It should also be noted that it is not necessary that there is a 1:1 relation between the movements of panel4A and pusher28(for example activating the motor4B could lead firstly to a movement of the panel4A and only a short while later a movement of the pusher28. Again, such mechanisms are known and need no further explanation.

When the closure means4starts to move towards its open position the upper frame part7will have started to move away from the lower frame part8(FIG. 3b). This movement is caused by the spring-load of the first spring member11, but also by the spring-load of the second spring member12.

InFIG. 3cthe closure means4still is in the process of being moved away further, and the upper frame part7has moved apart from the lower frame part8. The mesh material9almost has reached its fully tensioned position.

Finally,FIGS. 3dand3eshow the final movement of the wind deflector5under influence of spring member11towards its final position (FIG. 3e) in which the lower edge region of the mesh material9is positioned at a level above the upper surface of the roof1of the vehicle.

It is clear, that in the position illustrated inFIG. 3ethe first spring member11maintains the upper frame part7in the illustrated position, whereas the second spring member12maintains the lower frame part8in its spaced position relative to the upper frame part7.

It is noted, that the pusher28or other suitable means may be provided for positioning the wind deflector5in any desired position between its fully retracted position according toFIG. 3aand its fully extended position according toFIG. 3e. Basically, any position of the wind deflector5between the fully retracted position, a partly extended position in which the lower frame part8still is positioned below said level, and a fully extended position in which both the upper frame part7, mesh material9and lower frame part8are positioned above said level, can be chosen freely. In the first mentioned position (fully retracted) the wind deflector5is not operative. In the second mentioned position (partly extended) the wind deflector5basically functions as a state of the art wind deflector of the type referred to above, in which the main air flow is directed above the upper frame part with a smaller, secondary air flow through the mesh material, whereas in the third position (fully extended) also an additional air flow below the lower frame part8can be generated, promoting the characteristics of the wind deflector (especially its noise-preventing characteristics).

In the illustrated embodiment, the upper frame part7and lower frame part8both pivot around the same axis10. However, it is also conceivable that different pivot axes are provided which do not coincide.

Finally,FIG. 4aand4bshow an alternative embodiment of a wind deflector, in which the upper frame part7′ and lower frame part8′ form integrally connected parts, such that the relative position between the upper and lower frame parts7′ and8′ is fixed. In such an embodiment, the mesh material29may be rigid (for example a perforated metal sheet). Further, in the embodiment shown inFIG. 4only spring member11is needed. Spring member12may be omitted. In this illustration, pusher28has been omitted; however, it or another suitable drive mechanism can be used to control movement of the wind deflector as appreciated by those skilled in the art.

In the foregoing embodiments, the wind deflector5is of the pivoting type. However, this does not preclude the possibility that the wind deflector5is provided with a mechanism for realising a pure translational motion between its fully extended and fully retracted positions or translational motion with pivoting.

Such a mechanism is schematically illustrated by guides20and/or22with dashed lines inFIGS. 3E and 4B. The guides20and22coupled movably or in a fixed position to roof1receive guide element24,26on frame parts7,7′,8,8′, respectively.