Pipetting system with a pipetting device and at least one pipette tip releasably fastened thereto

A pipetting system, comprising:

• a pipetting device;
• at least one fastening element securable to the pipetting device;
• a pipetting tip releasably fastenable on the fastening element;
• an ejection means provided on the pipetting device and including
• an axially movable ejection element for releasing the pipette tip from the fastening element upon an axial movement of the ejection element, and drive means for axially displacing the ejection element, and
• a pull-means gear for transmitting an essentially axial drive movement of the drive means into an axial movement of the ejection element, with the ejection element at least on releasing the pipette tip from the fastening element, being axially movable over a smaller distance than a distance of the essentially axial movement of the drive means, and with ejection force acting on the pipette tip exceeding a force applied to the drive means for effecting the essential axial movement of the drive means,
• wherein the drive means and the ejection element have overlapping end sections, and
• wherein the pull-means gear includes a deflection roller rotably mounted on the end section of the ejection element, and a cable which at one end is stationary with regard to the fastening element and at another end is fixed to the end section of the drive means.