Abstract:
A hatchback lid for a motor vehicle with a top and a bottom hatchback lid part ( 5, 6 ) displaceably mounted in relation to each other. The top hatchback lid part ( 5 ) is jointed with the bottom hatchback lid part ( 6 ) in such a way that the two hatchback lid parts ( 5, 6 ) can be folded together into a completely open position.

Description:
FIELD OF THE INVENTION 
     The invention concerns a hatchback lid for a motor vehicle with a top and a bottom hatchback lid part displaceably mounted in relation to each other. 
     DESCRIPTION OF THE RELATED ART 
     Besides the common one-piece roof-mounted hatchback lids whose disadvantages are no doubt widely known, especially the necessary stepping-back for opening, the restricted standing height due to the limited opening angle, the problematic opening in tight parking spaces or in garages, there are also already known to be hatchback lid constructions with two parts, some of which have also been produced. One of these constructions provides a top and a bottom hatchback lid part which are mounted on the top and bottom of the hatchback opening and can be swivelled. With such a solution, the top and bottom hatchback lid parts can only be opened one after another, and usually two hands are necessary for opening. 
     Two-part hatchback lid parts are also known where the two hatch lid parts are laterally mounted on the hatchback opening and can be swivelled open and closed. In this case, both lid parts can also only be opened one after another and usage of the loading space in tight parking spaces is still uncomfortable. With an opening angle over 90° there is the further possibility of endangering other road-users. Also, the opening and closing can be problematic with wind load. 
     A hatchback lid for a motor vehicle is known from EP-A 0 774 370 which consists of a hatchback lid frame that can be swivelled from a closed to an open position. With this hatchback lid frame, at least one bottom sliding element is held in a sliding track which makes it possible to open a bottom lid area while the hatchback lid frame is closed. This construction can also contain a top sliding element for opening a top lid area which is attached to the hatchback lid frame and can be moved downwards. This is supposed to create a simply constructed hatchback lid which enables a comfortable and easy access to the bottom loading sill of the hatchback opening. However, with larger objects it is still necessary to swivel the total hatchback lid upwards in the usual manner in order to be able to use the complete hatchback opening for loading. 
     SUMMARY OF THE INVENTION 
     The purpose of this invention consists of producing a simply constructed two-part hatchback lid which does not contain the disadvantages of the known solutions and which particularly requires very little space backwards and upwards at opening. Furthermore, it should be constructible in a very simple way and also permit an ergonomically advantageous operation. 
     The invention solves this task by having the top hatchback lid part jointed with the bottom part in such a way that the two hatchback lid parts can be folded together into the open position. 
     Thus, a hatchback lid constructed according to the invention requires considerably less space for opening than the other known solutions. Concerning their mass and lever ratios, the two hatchback lid parts can be designed in such a way as to be constructed very simply and to be operated comfortably. The joint connection of the two foldable hatchback lid parts creates very good ergonomic conditions, e.g. the possibility of single-handed operation and, depending on the design, also the possibility of fully automated opening and closing. 
     In a preferred construction design of the invention, the top hatchback lid part as well as the bottom hatchback lid part are jointed and displaceably mounted in the lateral edge areas of the hatchback opening. This arrangement allows for a variable opening operation of the hatchback lid. 
     This construction form can now provide for a top resting position at the top edge of the hatchback opening area for the foldable hatchback lid parts. 
     Alternatively or additionally, a bottom resting position can be provided at the bottom edge of the hatchback opening for the foldable hatchback lid parts. 
     Both resting positions have advantages: for instance, in the top resting position, an unobstructed access to the hatchback opening for opening and closing is possible. In the bottom resting position, an additional shelf space can thus be provided. The latter is the case especially when, in the bottom resting position, the two folded-up hatchback lid parts have at least an approximate horizontal position and the top hatchback lid part can at least partially be covered by a protective carpet (or similar) which could be pulled out from the trunk. 
     In another simpler construction variation according to the invention, the top hatchback lid part is mounted onto the top edge area of the hatchback opening and can be swivelled. 
     In this case, the bottom hatchback lid part can be jointed and displaceably mounted on the lateral edge areas of the hatchback opening. This offers the advantage of a track for the bottom hatchback lid part. 
     Alternatively or additionally (in both construction variations), the bottom hatchback lid part can be connected to the top hatchback lid part via spring/damping elements or similar. This measure allows for a comfortable operation of the hatchback. 
     In order to have the hatchback opening completely available for loading and unloading and without any protruding hatchback part, it can additionally be provided to swivel the folded-up hatchback lid part in the direction of or onto the car roof. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further characteristics, advantages and details of the invention will now be described in the drawing which contains several representations of oblique views of a car hatch area. The following items are shown in the figures: 
     FIG. 1 is a perspective view of the hatch area of the car with the hatchback lid being closed, 
     FIG. 2 is a perspective view of the first construction form of the hatchback lid in an intermediate position during the opening process, 
     FIG. 3 is a perspective view of the hatchback lid according to FIG. 2 in its top resting position, 
     FIG. 4 is a perspective view of the hatchback lid according to FIG. 2 in its bottom resting position, and 
     FIG. 5 is a perspective view of the second construction form of the hatchback lid in an almost completely opened position. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the individual drawing figures,  1  designates the hatchback door opening of the car body,  2  the car roof,  3  the bottom of the rear trunk space and  4  the rear bumper. 
     A hatchback lid constructed according to the invention is composed of a top hatchback lid part  5  and a bottom hatchback lid part  6  which are basically designed to the same size. The top hatchback lid part  5  is designed as a transparent panel, made of plastic or glass, or is provided with such a panel. The bottom hatchback lid part  6  can be constructed in the common fashion, thus consisting of automotive body sheets and/or plastic. 
     The two hatchback lid parts  5 ,  6  are joined together in the central area of the hatchback opening  1 . In the slightly curved or bowed design of the hatchback lid parts  5 ,  6  represented in the drawing figures, two joint connections  7  (FIG. 2) are found between the adjoining edge areas of the hatchback lid parts  5 ,  6 . As particularly shown in FIG. 2, guide elements  8  are respectively provided on the two further edge areas of the hatchback lid parts  5 ,  6 , the guide elements&#39; construction not being represented any further than this. The guide elements  8  are mounted on the coulisses  10  which are only indicated in the drawing figures and are positioned at the two lateral edge areas of the car hatchback opening  1 . Thus, the hatchback lid parts  5 ,  6  are arranged in such a way that they can be moved from top to bottom and vice versa. 
     In FIG. 1, where the closed position of the hatchback lid parts  5 ,  6  is represented, a handle recess  11  can also be seen which is attached to the bottom hatchback lid part  6  there could also be a lock (not represented) at the same spot, as well as a handle  12  for manual operation of the two hatchback parts  5 ,  6 . In the represented design, the handle is situated on the top edge of the bottom hatchback lid part  6 . 
     For opening the hatchback lid, the two hatchback lid parts  5 ,  6  are brought into the position shown in FIG. 2 by pulling the handle  12  after having unlatched the lock (not represented). Thus the top and bottom hatchback lid parts  5 ,  6  are folded together from a mutual movement around the joint connections  7  and also from the sliding movement in the coulisses  10  sufficiently enough so that a certain acute angle remains between the top and bottom hatchback lid parts  5 ,  6 . In this position, using appropriate mechanisms (not represented) will ensure that the hatchback parts  5 ,  6  cannot fold together completely. Afterwards, the hatchback lid can either be slid upwards (see arrow  22  in FIG. 2) or downwards (see arrow  23  in FIG.  2 ). When slid upwards, the position shown in FIG. 3 is achieved where both hatchback lid parts  5 ,  6  take on an almost completely folded-up position. 
     The two hatchback parts  5 ,  6  are folded up completely at reaching the bottom resting position also when slid downwards, shown in FIG.  4 . There are appropriate devices (not represented) provided which can include spring elements, dampers or electric motors. These support a mutual folding-up of the two hatchback parts  5 ,  6  in closing the hatchback opening from the top or bottom resting position. It is also ensured that the two hatchback lid parts  5 ,  6  remain in their respective positions when being released by using an appropriate mechanism. 
     Starting from the top resting position in FIG. 3, a swivelling of the folded-up hatchback lid parts  5 ,  6  can additionally be swivelled towards or onto the car roof  2  by using swivel bearings. This additional function is indicated in FIG.  3  through the arrows  20  and  21 . 
     As can bee seen in FIG. 4, the completely folded-up hatchback lid can be additionally used as a trunk sill, shelf, seat area or similar when in the bottom resting position For this, a protective carpet (or similar) can be provided which could be pulled out from the floor bottom  3  (see arrow  24  in FIG. 4) which would protect the top hatchback lid part  5  (made of transparent material, glass or plastic) from being damaged. 
     FIG. 5 shows another construction form of the arrangement of the two jointed hatchback lid parts  5 ,  6  on the hatchback opening  1 . However, the top hatchback lid part  5  is mounted on the top edge area of the hatchback opening  1  in such a way that it can be rotated through joint connections  7 ′ but cannot be slid. The second bottom hatchback lid part  6  can now either be displaceably mounted via joint connections in lateral coulisses, as in the model type already described, or it can be jointed with the hatchback lid part  6  without any separate lateral guide. In this case, for instance, it is intended that the top and the bottom hatchback lid parts  5 ,  6  be connected via an appropriate spring/damper arrangement which can be constructed in a common way. 
     In this construction variation, there is only a top resting position provided while it is also ensured in this instance that the position adapted by both hatchback lid parts  5 ,  6  cannot change unintentionally or on their own. 
     The invention is not restricted to the represented and described models. For instance, it is possible to construct the hatchback lid part only slightly curved or not at all, and to also provide a joint connection in the middle between the hatchback lid parts.