Means for generating a haptic feedback input unit of a keyless

The invention relates to an apparatus for generating haptic feedback buttons loose input units such as "touch screens" or "Keypads" in mobile IT devices such as mobile phones, PDAs, music or multimedia players, cameras, navigation devices, etc. The market demands a device which can generate a haptic signal for a touch screen such that the display is moved as a whole is substantially perpendicular to the housing surface is at least in one direction. In order to achieve this object, the invention provides a device for generating a haptic feedback to a keyless entry unit ready, the device comprising an elastic, substantially plate-shaped substrate at least a first bearing point for fixing the substrate to a structure of the input device and at least one second bearing point for fixing the substrate to the input unit includes, and is adapted to support the input unit movable relative to the structure of the input device, wherein a piezoelectric element between the first and second bearing locations of the substrate is arranged such that an electrical control of the piezoelectric element one of the bearing points is moved transversely to the plane of the plate-shaped substrate.