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You are an expert at summarizing long articles. Proceed to summarize the following text: 
BACKGROUND OF THE INVENTION 
     The invention relates to a driving-in tool for the correct mounting of furniture fittings provided with a rotatable lever. 
     Driving-in tools for the insertion of furniture fittings can be used with mounting devices of drills which simultaneously serve to press in mounting plates or cup-shaped hinge parts into the cut mounting and dowel holes. Such a drill and mounting device is known from DE 35 08 521 A. On the other hand, driving-in tools are already known for the manual mounting of furniture fittings. For example, connection fittings made of plastic can be sunk through furniture fittings into pre-drilled mounting holes by press fit. Here, the driving-in tools are suitable to distribute the press force in the correct manner without any damage to the furniture fittings. 
     A fitting element for fittings is known, for example, from DE 295 11 216 which can only be locked in place in a pre-drilled borehole of an assembly part by throwing or pressing down a lever. Here, the fitting element consists of a conical, essentially cylindrical section which is provided with a radial breakthrough in which two spreaders are guided for travelling out in opposite directions over the cylindrical jacket contour and for being pulled back in its region and of a link or slide whose one end can have pressure applied to it by an actuating lever for its motion and whose other end is fitted to a bolt guided in axial slits of the cylindrical section, which bolt penetrates slots of the spreaders positioned in such a way that said spreaders are travelled in and out by a rotation of the link or lever. While such fitting elements allow the mounting of prefabricated furniture parts without any special tools such as screwdrivers or similar, they can, however, be actuated unintentionally by accident prior to the final pressing in of the fitting as the rotating lever is supported near the surface on the fitting and is generally rotatable in the same direction of pressing in. This has the consequence that the fittings can be unintentionally fitted in an incorrect position. 
     SUMMARY OF THE INVENTION 
     It is the object of the invention to provide a driving-in tool for furniture fittings provided with at least one rotating lever, which driving-in tool simplifies the easy and correct mounting of the furniture fittings in the pre-drilled boreholes of the furniture parts. 
     In accordance with the invention, this object is solved by a driving-in tool in accordance with the a driving-in tool for a furniture fitting part which can be fitted in place by at least one rotating lever, by combination with the the driving-in tool possessing a centering part shaped in accordance with the fitting part to be connected and serving as an insertion guide and a spring or spring-loaded holding part supporting the lever in its open position. Accordingly, the driving-in tool possesses a centering part shaped to correspond to the connecting fitting and serving as an insertion guide and a spring or spring-loaded part supporting the rotating lever in its open position. 
     The furniture fitting remains in a fixed, pre-mounted position on the driving-in tool during the mounting, with the actuating lever of the furniture fitting being turned in its open position and being supported in this by the holding part of the driving-in tool. The furniture fitting is not directly actuated during mounting so that any unintentional throwing of the actuating lever is excluded. Only when the fitting part has been put into its completely inserted mounting position and has been fixed in this position by the lever now having been intentionally thrown by overcoming the spring force of the holding part can the driving-in tool again be removed from the fitting part. The correct mounting position is thus ensured. 
     Preferred aspects of the invention can be seen from the further description herein. 
     The invention can advantageously be further developed by providing on the driving-in tool another actuating lever which acts on the actuating lever of the furniture fitting part and which enlarges the latter&#39;s lever arm and thus reduces the force to be exerted. When inserting the fitting parts provided with the actuating levers into the furniture parts, no pressing force is required so that manual mounting can generally be performed without any great force. When locking the fitting parts in position in the associated boreholes, however, force must be exerted to throw the at least one actuating lever which force can lead to finger fatigue, particularly in the event of extensive mounting work. Here, a remedy is created thanks to the aspect of the invention described above by which the force application to throw the actuating lever for the furniture fitting is reduced. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further details and advantages of the invention can be found in the embodiments of the present invention shown in the drawing, in which 
     FIGS. 1 to  3  show different representations of a first embodiment of the driving-in tool in accordance with the invention; and 
     FIGS. 4 to  6  show a second embodiment of the driving-in tool in accordance with the invention in different views. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 2 shows the first embodiment of a driving-in tool  10 , which possesses an actuating part or a handle  12  and a lower centering part  13 . The centering part  13  is shaped in accordance with the recess of the furniture fitting part  14  to be inserted (FIG.  1 ). From the bottom view of the driving-in tool  10  shown in FIG. 3, the form of the centering part  13  can be seen. The driving-in tool  10  has overall essentially a cuboid basic shape and consists preferably of plastic. In a recess  16  following on from the centering part  13  there protrudes a rounded end of a journal  18  which is pressed by means of a spring  20  against a flange-shaped stop  22  beneath the rounded end of the journal  18 . The spring  20  is supported in a slanted recess or borehole in the region of the centering part  13 , said recess or borehole being closed by a threaded pin  24 . 
     In FIG. 1, the driving-in tool  10  is inserted in a corresponding fitting part  14 . The fitting part  14  has a design as already described in DE 295 11 216 U. It possesses a hinge arm  26  which is hinged to a hinge cup  32  by means of two links  28  and  30 . The hinge arm  26  is of a known type and is therefore not described in detail. 
     The hinge cup  32  can be provided in a conventional way on a furniture door  34  with a flat, blind borehole  36  for the mounting of the hinge cup  32  and to the side of said borehole with two pre-drilled blind holes  38 . In these pre-drilled blind holes  38 , two dowel-like cylindrical sections  40  are inserted which are fitted to the flange-shaped edges  42  of the hinge cup  32 . The dowel-like cylindrical sections  40  are locked in place in the pre-drilled blind holes  38  only be pressing down an actuating lever  44 . By means of the actuating lever  44 , a bolt  48  guided in axial slots  46  is fixed in place which applies pressure to two spreaders  50  which can be moveed out over the cylindrical section  40  in such a way that they can be moved in and out by rotating the actuating lever. Specifically, with regard to this design of the fitting elements reference can be made to DE 295 11 216 U. In FIG. 1, the driving-in tool  10  is shown in a position inserted into the fitting part  14 . The connection of the driving-in tool  10  to the fitting part  14  is effected by the actuating lever  44  being rotated into its open position in which it is supported, as shown in FIG. 1, by the rounded end of the journal  18 . In this position, the cup  32  can be inserted into the furniture door  34  by means of the handle  12 . After inserting the hinge cup  32  into its end position, the actuating lever  44  can be rotated downwards in the direction of the arrow a against the resistance of the rounded end of the journal  18 , i.e. against the spring force  20 . In this way, it is ensured that the rotating lever  44  is only actuated after the complete pressing in of the fitting part  14 . After the mounting of the furniture fitting part  14  in the furniture door  34 , the driving-in tool  10  can again be separated from the fitting part  14 . 
     In FIGS. 4 to  6 , another embodiment of the invention is shown where the driving-in tool  10  possesses on the side opposite the recess  16  a protrusion  52  at whose free end an actuating lever  56  is pivoted around a bolt  54 . The actuating lever  56  is, as can be seen particularly in detail in FIG. 4, positioned in such a way that in the mounted state of the driving-in tool  10  it can interact with the actuating lever  44  of the fitting part  14 . Due to the comparatively longer lever arm of the actuating lever  56 , the actuating lever  44  can be rotated by means of a lower force in the direction of the arrow a against the force of the spring-biased rounded end of the journal  18 .

Summary:
A driving-in tool for a furniture part which can be fitted in place by at least one rotating lever, is provided in which the driving-in tool possesses a centering part shaped in accordance with the fitting part to be connected and serving as an insertion guide, and a spring or spring-loaded holding part supporting the rotating lever in its open position.