Device for shaking and sampling biological liquids

A shaking and sample-taking device for biological liquids that is configured to take samples of biological liquids in a tube, comprising

• a shaker that is configured to mix a rack holding one or more tubes by performing a succession of tilting movements between two shaking positions, wherein the shaker is also arranged to tilt beyond the shaking position furthest from an insertion position of a rack to discharge the rack by gravity, wherein the shaker comprises an open support, and
• a cover that is arranged to prevent the rack from coming out of the shaker during shaking thereof and that is mounted rotatingly on the shaker in order to release the rack through an opening in the support when the shaker is tilted beyond the shaking position furthest away from the insertion position of the rack, and wherein the cover has a portion that butts against the shaker when the shaker reaches the shaking position furthest away from the insertion position of a rack, and a spring arranged to be compressed when the shaker tilts beyond this position, such that the cover does not prevent the rack from coming out.