Adjustable holding device on board computers in motor vehicles, especially for a laptop or a notebook computer

An adjustable holding device (HE1) for on-board computers in motor vehicles, comprising:

• a support construction (h1) with a table top plate (h2) at a top end of said support construction for demountably and remountably holding the on-board computer in an interior of the motor vehicle in a working position with respect to a vehicle occupant operating the on-board computer;
• a fastening system (h3) at a lower end of the support construction (h1) for scouring the support construction on support surfaces (A1, A2) in or near a floor region (A3) of the interior of the motor vehicle, said fastening system (h3) comprising a clamping system with at least one clamping strut adapted for clamping on the support surfaces (A1, A2) of the motor vehicle interior and extending at least approximately perpendicular to the floor of the vehicle when installed and opposing each other with a spacing;
• said clamping strut having two ends and having on each of its two ends a contact pressure element (B1, B2), said contact-pressure elements being provided with outer counter support surfaces (B10, B20) for pressingly abutting the support surfaces (A1, A2) when installed, wherein the clamping system (h3) is provided with means for increasing spacing between the contact-pressure elements (B1, B2) relative to one another during installation of said clamping system, such increase in spacing generating contact pressure force, or for reducing the spacing between the contact-pressure elements during removal of the clamping system (h3), such reduction in spacing reducing the force of contact pressure;
• wherein the clamping system is a spreading system and the clamping strut is a spreading strut (23) having at least two spreading levers (24, 25) connected by a lockable and releasable hinged joint (26), wherein at least one of said spreading levers (25) can be pre-adjusted with respect to length so that in a bent ready-position (I), the spreading strut (23) can be positioned with its contact-pressure elements (B1, B2) spaced from the support surfaces (A1, A2), and the spreading strut (23) can be stretched by means of depressing the hinged joint (26), to a length generating a contact pressure force (f3, f4), wherein a stretched and installed position (II) of the expanding strut (23) can be arrested by locking the hinged joint (26).