A drive device for pivoting a leaf, in particular a door leaf or window leaf, about a leaf axis, the drive device having a motor-transmission module, the motor-transmission module including an electric machine having a machine axis as well as a transmission having an output shaft that is mounted to be rotatable about an output axis. The electric machine is at least partially, in particular entirely, arranged in a mounting space between the leaf axis and the output axis.

A concealed hinge with V-shaped rotating shafts includes an upper leaf (6) and an upper support arm (4) that are hinged to a secondary hinge (1), and a lower leaf (7) and a lower support arm (5) that are hinged to a primary hinge (8). The upper leaf (6) is hinged to the lower leaf (7). The upper support arm (4) is hinged to the lower support arm (5). A hinged joint at an end of the upper leaf (6) is connected, by means of a shaft (2), to a hinged seat secured to the secondary hinge (1). A hinged joint at one end of the lower leaf (7) is connected, by means of a shaft (2), to a hinged seat secured to the primary hinge (8), and a hinged joint at the other end of the lower leaf (7) is connected to the upper leaf (6) by means of a shared shaft (3). One end of the upper support arm (4) is connected, by means of a side shaft (10), to the hinged seat secured to the secondary hinge (1), and a hinged joint at the other end of the upper support arm (4) is connected to the lower support arm (5) by means of a longitudinal shared shaft (11). A hinged joint at an end of the lower support arm (5) is connected, by means of a side shaft (10), to the hinged seat secured to the primary hinge (8). The concealed hinge is reasonable in structure design, simple and convenient to mount, safe and capable of preventing burglary, extensive in application, small in space usage and convenient to mount and transport, and has good appearance.

A drive device for moving a leaf, in particular a door leaf or a window leaf, with an electric machine including an, in particular single, stator and an, in particular single, rotor, which can be rotated about a machine axis, and with a gear coupled to the electric machine. The gear has a first gear element, which can be rotated coaxially with the machine axis, with the first gear element being connected to the rotor in a rotationally-fixed manner.

A retention and guide assembly for a vehicle door includes a guide track connected to a door panel of the vehicle door. The guide track includes sidewalls that at least partially extend around and define an internal recessed volume. The sidewalls include a first sidewall coupled with the door panel and a second sidewall coupled with and oriented transverse to the first sidewall. The guide track includes a retaining flange that is coupled with and oriented transverse to the second sidewall. The sidewalls and the retaining flange are shaped to receive (within the internal recessed volume) a roller of a control arm extending from a vehicle body. The retaining flange engages the control arm and/or the roller and retain the roller within the internal recessed volume of the guide track between the second sidewall and the door panel of the vehicle door.

The invention relates to a flap drive system for a flap which is movably mounted on a furniture carcass. The flap drive system is arranged on a sidewall of the furniture carcass. The flap drive system includes a mechanical actuating unit having an actuating arm that can be connected to the flap and an accumulator acting upon the actuating arm, and an electric drive, fastened on the mechanical actuating unit for driving the flap. The electric drive has at least one electric motor, and a gear stage which allows the transmission of force from the electric drive onto the mechanical actuating unit. The gear stage is designed as a separate component, and has a housing that is independent from the mechanical actuating unit and the electric drive or an independent mounting plate.