Abstract:
An open roof construction for a vehicle comprises a stationary part for attachment to the roof. It has at least one stationary guide rail on a side of the roof opening. A closure element is supported by an operating mechanism and is adjustable between a closed position, in which it closes the roof opening, and an open position. The operating mechanism comprises a driving slide and a link plate attached to the closure element and having a first guide track with which a guide member is in engagement. A curve part on the stationary part includes a second guide track having a vertical component. The guide member is also in engagement with said second guide track, wherein the driving slide is adapted to drive the guide member at least along part of the path of movement of the closure element.  
     The driving slide has releasable first and second coupling members to couple and uncouple the driving slide with respect to the guide member and to the closure element, respectively, so as to either drive the guide member with respect to the first and second guide tracks and/or or to drive the closure element with respect to the guide member.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The present invention relates to an open roof construction for a vehicle, as well as to a method of moving a closure element in an open roof construction.  
           [0002]    Such an open roof construction and method are known from WO-A-00/06403 of applicant. The open roof construction disclosed therein is a so called tilt-sliding roof.  
         SUMMARY OF THE INVENTION  
         [0003]    The object of the present invention is to adapt the operating mechanism of the prior art in order to enable the closure element to perform other or additional movements.  
           [0004]    An open roof construction for a vehicle comprises a stationary part for attachment to the roof. It has at least one stationary guide rail on a side of the roof opening. A closure element is supported by an operating mechanism and is adjustable between a closed position, in which it closes the roof opening, and an open position. The operating mechanism comprises a driving slide and a link plate attached to the closure element and having a first guide track with which a guide member is in engagement. A curve part on the stationary part includes a second guide track having a vertical component. The guide member is also in engagement with said second guide track, wherein the driving slide is adapted to drive the guide member at least along part of the path of movement of the closure element.  
           [0005]    The driving slide has releasable first and second coupling members to couple and uncouple the driving slide with respect to the guide member and to the closure element, respectively, so as to either drive the guide member with respect to the first and second guide tracks and/or or to drive the closure element with respect to the guide member.  
           [0006]    By having the driving slide coupled to either the guide member and/or to the closure element, it is possible to obtain a different way of operating the closure element.  
           [0007]    This is particularly useful for open roof constructions of the spoiler type in which the closure element is moved from the closed position rearwardly above the fixed roof. In this embodiment, the curve part is substantially fixed to the stationary part, whereas the guide member has a locking element in order to lock it to the stationary part, substantially while the closure element is moved with respect to the guide member.  
           [0008]    In this manner, the support of the closure element can be positioned to the rear of the roof opening. Then, the curve part with the second guide track is substantially stationary and may thus be positioned near the rear edge of the roof opening since it is not or substantially not moved in the rearward direction. The guide member may take a rear position on the curve part when the closure element is moved with respect to the guide member and the second guide track, thus maximizing the rearward position. It is also very easy to make the curve part and the guide member strong and rigid and minimise the flexural forces in the guide member, since there is no need for a set-out lever.  
           [0009]    The mechanism for coupling and uncoupling the driving slide to and from the guide member and the closure element can be made reliable and robust so that a smooth operation can be obtained with a small number of parts. There is sufficient design freedom to obtain a controllable driving slide displacement for the different movements of the closure element. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    The invention will hereafter will be elucidated with reference to the drawings showing an embodiment of the open roof construction according to the invention.  
         [0011]    FIGS.  1 - 5  are longitudinal sectional views of the open roof construction in four different positions thereof.  
         [0012]    [0012]FIGS. 6 and 7 are perspective exploded views from two different angles showing the parts of the operating mechanism in the open roof construction of FIGS.  1 - 5  from two sides.  
         [0013]    [0013]FIGS. 8 a - d  are views corresponding to those of FIGS.  1 - 5 , but showing only two parts of the operating mechanism in an isolated manner and on an enlarged scale.  
         [0014]    [0014]FIGS. 9 a - e  are views corresponding to those of FIGS. 8 a - d , but showing different parts of the operating mechanism on a different scale.  
         [0015]    [0015]FIGS. 10 a - d  are views corresponding to that of FIGS. 8 a - d , but showing still other parts of the operating mechanism on a different scale. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0016]    The drawings show an embodiment of an open roof construction for a vehicle which, in the embodiment as shown, is an MPV (multi purpose vehicle) having a fixed roof  1  including a raised rear portion  1 ′. In front of the raised rear portion  1 ′, there is provided a roof opening  2  in the fixed roof  1 . The fixed roof  1  of the vehicle may form part of the vehicle, but may also form part of the open roof construction assembly which is built in the vehicle as a complete roof. The dashed lines in FIGS.  1 - 5  illustrate the contours of a different vehicle having a different fixed roof  1  and a different roof opening  2 , but using the same operating mechanism for the open roof construction.  
         [0017]    The open roof construction comprises a closure element, here in the form of a rigid, preferably a mainly transparent glass or plastic panel  3 . The closure element could also be constructed differently, or the open roof construction may include several closure elements.  
         [0018]    The open roof construction is of the so-called spoiler type which means that the panel  3  is movable from a closed position in the roof opening (FIG. 1), preferably flush with the fixed roof  1 , to a rearwardly displaced position above the roof portion  1 ′ behind the roof opening  2  (FIG. 5). In the embodiment shown, the panel  3  can first be moved to a venting position in which the rear edge of the panel  3  is mainly tilted and the panel  3  is kept substantially stationary in longitudinal direction of the vehicle (FIG. 2). After this tilting to the venting position according to FIG. 2, the panel is displaced rearwardly, first to the positions of FIGS. 3 and 4 and then to the end position of FIG. 5. From this position, the panel  3  may be moved in opposite direction to the closed position of FIG. 1 again.  
         [0019]    In order to enable the panel  3  to perform the movements as described above, it is supported by an operating mechanism  4 , preferably on each longitudinal side of the roof opening  2 . The drawings show one operating mechanism  4 , but in the embodiment shown there is another operating mechanism on the other side of the roof opening  2 , the parts of which will generally be a mirror image of the parts as shown.  
         [0020]    The operating mechanism  4  is mounted in a stationary guide rail  5  which forms part of, or is mounted to a stationary part of the open roof construction, generally a frame  6  which is mounted to the fixed roof  1  of the vehicle.  
         [0021]    The operating mechanism  4  includes a link plate  7  mounted to the panel  3  along the longitudinal side edge thereof. The link plate  7  has a front guide shoe  8  with which the front of the panel  3  is slidably guided in a groove of the stationary guide rail  5  and which front guide shoe, in the embodiment shown, also functions as a front pivot of the panel  3  about which the link plate  7  may be pivoted. It would also be possible to have the sliding and the pivoting functions separated.  
         [0022]    The operating mechanism  4  is driven and actuated by means of a driving slide  9  which is guided in the stationary guide rail  5  and which is controlled by a driving means such as an electric motor or a hand crank which is connected to the driving slide  9 , for example through a push and pull cable (not shown).  
         [0023]    The operating mechanism  4  also includes a rear support for the panel  3  positioned a (variable) distance behind the front guide shoe  8  and constructed as a guide member  10  which may be driven during at least a part of the movement of the panel  3  by the driving slide  9 . The guide member  10  is slidably in engagement which the link plate  7  of the panel  3  through a first guide track  11 , in this case formed by two laterally projecting ribs extending in opposite directions, i.e. away from each other. The guide member  10  is also slidably in engagement with a second guide track  12  formed on a curve plate  13  which is stationary with respect to the guide rail  5 . The second guide track  12  is also formed by two laterally extending ribs which, however, extend towards each other.  
         [0024]    As is shown in the drawings, both guide tracks  11 ,  12  extend in a curve, or at least have a component in a direction perpendicularly to the longitudinal guide rail  5 . The first guide track  11  on the link plate  7  is substantially longer than a second guide track  12  and the function thereof will be explained later on.  
         [0025]    As mentioned before, the guide member  10  is drivable by means of the driving slide  9 , in this case only during part of the movements of the panel  3 , so that the guide member  10  and the driving slide  9  are not permanently connected but are connected through a coupling member in order to couple and uncouple the driving slide  9  to and from the guide member  10 . For this purpose the guide member  10  has a guide member slide  14  which is slidably guided in the stationary guide rail  5  and to which the guide member  10  is pivotally connected through a pivot  15 . The guide member slide  14  includes a slot  16  in which a cam  17  on the driving slide  9  may engage. The slot  16  has a long lost motion portion  16 ′ allowing the cam  17  of the driving slide  9  to move and thereby allowing the driving slide  9  to move with respect to the guide member  10 . The slot  16  has also a locking portion  16 ″ extending at an angle to the direction of the guide rail  5 , so that, when the end of the guide member slide  14  including the locking portion  16 ″ of the slot  16  is locked against a movement in a lateral direction, the cam  17  of the driving slide  9  is locked in said locking portion  16 ″ and thus the driving slide  9  and the guide member slide  14  form a unit in order to displace the guide member  10 .  
         [0026]    The portion of the guide member slide  14  containing the locking portion  16 ″ is locked against movement in the lateral direction as long as a locking cam  18  in-line with the locking portion  16 ″ is not engaged in a recess  19  in the stationary guide rail  5 . As soon as the locking cam  18  is positioned laterally in-line with the locking recess  19 , it is allowed to move in the lateral direction allowing the cam  17  to leave the locking portion  16 ″ and enter the lost motion portion  16 ′ of the slot  16 . In this way, the guide member slide  14  and thereby the guide member  10  is locked with respect to the stationary guide rail  5  and the driving slide  9  is allowed to move with respect to the guide member  10  which is kept substantially stationary.  
         [0027]    When or just before the driving slide  9  is uncoupled from the guide member  10  it is allowed to be coupled to the panel  3  in order to slide the panel  3  and allow the first guide track  11  of the panel  3  to move with respect to the guide member  10 .  
         [0028]    To couple the driving slide  9  to the panel  3  there is provided a link plate slide  20  which is connected to the link plate  7  of the panel in a manner to be described and which is adapted to be coupled and uncoupled to and from the driving slide  9 . For this purpose, the link plate slide  20  comprises a slot  21  including a lost motion portion  21 ′ and a locking portion  21 ″. The driving slide  9  includes a cam  22  adapted to slide in the lost motion portion  21 ′ and adapted to be locked in the locking portion  21 ″ of slot  21  in the link plate slide  20 . The cam  22  of the driving slide  9  will be locked in the locking portion  21 ″ of the link plate slide  20  as long as a locking tab  23 , which is positioned in the vicinity of the locking portion  21 ″ of the slot  21 , is not in engagement with a locking recess  24  in the stationary guide rail  5 . If the locking tab  23  is allowed to enter the locking recess  24 , the locking portion  21 ″ is no longer locked against a height movement in the stationary guide rail  5  thereby allowing the cam  22  of the driving slide  9  to leave the locking portion  21 ″ of the slot  21  and to enter the lost motion portion  21 ′. Thus, the link plate slide  20  is locked with respect to the stationary guide rail  5  and is uncoupled from the driving slide  9 .  
         [0029]    As mentioned before, the link plate slide  20  is connected in a special manner to the link plate  7 , that is through a panel front connection mechanism including a laterally extending cam  25  and a short groove  26  in the link plate  7  which has an extent that deviates from a circle around the pivot axis of the link plate  6 . This means that during a pivoting movement of the link plate  7  and therefore the panel  3  during the tilting phase, the groove  26  is moved with respect to the stationary cam  25  (the link plate slide  20  is locked when the panel  3  is tilted). The panel  3  is then displaced slightly in a longitudinal direction of the stationary guide rail  5  in order to move the front edge of the panel  3  away from the front edge of the roof opening  2  to prevent damage to a seal which is present between the front side of the panel  3  and the edge of the roof opening  2 .  
         [0030]    The operation of the operating mechanism  4  will now be described with reference to FIGS.  1 - 5  and FIGS.  8 - 10 .  
         [0031]    In FIG. 1 the panel  3  is in the closed position. The driving slide  9  is in its front position. The cam  17  of the driving slide  9  is locked in the locking portion  16 ″ of the guide member slide  14 , whereas the other cam  22  is positioned at the end of the lost motion portion  21 ′ of the slot  25  remote from the locking portion  21 ″ (FIG. 8 a ). The cam  25  of the front correction mechanism is positioned at the upper end of the groove  26  in the link plate  7  (FIG. 10 a ). The guide member  10  is in engagement with both guide tracks  11  and  12 , that is at the forward end of the second guide track and in a position between the ends of the first guide track  11  (FIG. 9 a ).  
         [0032]    In the position of FIG. 2, the driving slide  9  is moved a distance rearwardly and the panel  3  is pivoted to the venting position in which the rear edge of the panel  3  is lifted. The guide member slide  14  is displaced as a unit together with the driving slide  9  thereby urging the guide member  10  to slide along the first and second guide tracks  11 ,  12  (FIG. 9 b ). Depending on the shape and direction of the guide tracks  11 ,  12  the rear side of the panel  3  will be lifted by the guide member  10 , especially when it is moved along a first portion of the first guide track  11  which extends under a larger angle with respect to the stationary guide rail  5  than a second portion. The guide member  10  is allowed to pivot with respect to the guide member slide  14  in order to allow the guide member  10  to move in a vertical direction.  
         [0033]    Since the cam  25  of the link plate slide  20  is stationary, the groove  26  is moved with respect to the cam  25  as a result of the pivoting movement of the link plate  7  (FIG. 10 b ). As the groove  26  inclines rearwardly and upwardly the link plate  7  has to be displaced slightly rearwardly in order to allow the groove  26  to follow the cam  25 . The front side of the panel  3  is hence moved away from the front edge of the roof opening  2 .  
         [0034]    The cam  22  of the driving slide  9  has been displaced through the lost motion portion  21 ′ of the link plate slide  20  and has come in the vicinity of the locking portion  21 ″ (FIG. 8 b ).  
         [0035]    In the position of FIG. 3, the cam  22  of the driving slide  9  has entered the locking portion  21 ″ and has moved the rear end of the link plate slide  20  upwardly in order to lift the locking tab  23  of the link plate slide  20  out of the locking recess  24  (FIG. 8 c ). During a part of the displacement of the driving slide  9  between the positions of FIGS. 2 and 3 the displacement of the driving slide  9  has caused the cam  22  to push the link plate slide  20  rearwardly and move as a unit with the driving slide  9 . The cam  22  cannot leave the locking portion  21 ″ because the locking tab  23  engages a flange of the stationary guide rail  5  (not shown) as long as it is moved away from the locking recess  24 .  
         [0036]    Between the positions of FIGS. 2 and 3, the driving slide  9  is coupled to both the link plate slide  20  and to the guide member slide  14 . In FIG. 3, the locking cam  18  in the guide member slide  14  has arrived at the locking recess  19  in the stationary guide rail  5  allowing the locking cam  18  to move laterally and allowing the cam  17  in the driving slide  9  to leave the locking portion  16 ″ of slot  16  in the guide member slide  14 . Then the guide member slide  14  and the guide member  10  are locked in position and the driving slide  9  is allowed to move with respect to the stationary guide member slide  14  due to the displacement of cam  17  through the lost motion portion  16 ′ in slot  16 . Since, during the movement of the driving slide from the position of FIG. 2 to the position of FIG. 3, the driving slide  9  is coupled to both the link plate slide  20  and to the guide member slide  14  there is in overlap in the coupling and uncoupling of the driving slide  9  to the other slides  14 ,  20  (cf. FIGS. 9 c  and  9   b ).  
         [0037]    In the position of FIG. 4, the driving slide  9  and the link plate slide  20  have moved as a unit and the guide member slide  14  has been locked with respect to the stationary guide rail  5 . As a result, the link plate  7  and the first guide track  11  slide with respect to the guide member  10  so that the panel  3  is slid rearwardly and is possibly also moved in a vertical direction depending on the curvature of the first guide track  11  (FIG. 9 d ). The curvature of the guide track  11  will be chosen so as to obtain the desired panel movement, in this case there is the raised portion  1 ′ of the fixed roof  1  necessitating a further upward movement of the rear edge of the panel  3 . In FIG. 4 the first guide track  11  and the guide member  10  are again in the same relative position as in the closed position of the panel  3  according to FIG. 1.  
         [0038]    From there the driving slide  9  and therefore the link plate  7  are moved further rearwardly to the fully opened position according to FIGS. 5 and 9 e . The guide member  10  then slides relatively along a forwardly extended part of the first guide track  11 , and in the open position, the guide member  10  has arrived at the front end thereof. The curvature of the first guide track has caused the panel to tilt in a required fashion during the rearward sliding movement thereof. Closing of the panel  3  is effected by displacing the driving slide  9  in the forward direction again. The different movements as described before are performed in opposite direction and in the reversed order.  
         [0039]    From the foregoing it will be clear that the invention provides a very stable support for panel  3  and allows a desired movement of the panel  3  through controllable driving slide displacements. The support of the panel  3  in the vertical direction is very strong due to the in-line support of the guide member. The rear support of the panel is spaced a large distance from the front support of the panel  3  to further enhance stability. With a small number of parts there is also obtained a panel front correction.  
         [0040]    The invention is not limited to the embodiment shown in the drawing and described during before which may be varied in different manners within the scope of the appended claims.