Pipette for use with a pipette tip

A pipette for use with a pipette tip comprising:

• a rod-shaped pipette housing,
• a pin on a bottom end of the pipette housing for holding a pipette tip, the pin having a first means for the form-fit connection to the pipette tip, the pipette tip having a second means for the form-fit connection to the first means for the form-fit connection, the pin being elastically contractible or the pipette tip being elastically expandable, wherein the pin elastically contracts to the pipette tip or the pipette tip elastically expands to the pin prior to the form fit connection of the pipette tip onto the pin,
• a drive apparatus for displacing a displacement element for aspirating a liquid specimen into the pipette tip held on the pin, and ejecting the specimen from the pipette tip,
• at least one locking sleeve arranged concentric to the pin, the at least one locking sleeve being displaceably guided in an axial direction of the pin in the pipette housing, wherein the locking sleeve is displaceable into a locked position and in an upward direction away from the locked position into an unlocked position,
• wherein the at least one locking sleeve borders the inside of the pin in the locked position or borders the outside of the pipette tip in the locked position, the locking sleeve preventing the removal of the pipette tip from the pin during the form fit connection of the pipette tip onto the pin, and wherein the locking sleeve in the unlocked position is distal relative to the inside of the pin or the outside of the pipette tip, wherein in the unlocked position the pipette tip is removable from the pin.