Drawer assembly for a laboratory instrument

A drawer assembly for a laboratory instrument, the drawer assembly comprising:

• a drawer configured to be loaded with a magazine for receiving vessels for liquids of the laboratory instrument, wherein the drawer comprises a front end and a rear end;
• a frame comprising at least one portion arranged adjacent the drawer, wherein the portion extends in a longitudinal direction from a first end to a second end, wherein the drawer is moveable relative to the frame between a retracted position, in which the drawer is retracted in the frame and the front end is adjacent the first end, and an extended position, in which the drawer is extended from the frame and the front end is adjacent the second end, wherein the frame comprises a path having a first portion and a second portion below the first portion, wherein the first portion and the second portion extend in a direction parallel to the longitudinal direction, and wherein the first portion is tapered towards the first end and facing the drawer;
• a rolling element moveable in the path;
• a lifting mechanism configured to lift the rolling element from the second portion to the first portion when the drawer is in the retracted position, wherein the path is configured such that the rolling element is located in the first portion and contacts the drawer when the drawer is moved from the retracted position to the extended position and that the rolling element is allowed to enter the second portion exclusively when the drawer is in the extended position;
• and
• a stopper element configured to prevent movement of the drawer from the extended position to the retracted position when the magazine loaded with at least one vessel is in the drawer, wherein the stopper element is arranged at a position so as to extend across a top surface of the magazine.