Abstract: A laboratory instrument for fixing an object carrier, the instrument including a main component for receiving an object carrier, a positioning fixture for application to a first edge region of the object carrier, a second positioning fixture for application to a second edge region of the object carrier, a fixing mechanism for fixing the object carrier on the main component between the first positioning fixture and the second positioning fixture by moving at least the first positioning fixture, and an actuating device for actuating the fixing mechanism for transposing at least the first positioning fixture between an operational state and an operational state which releases the object carrier, wherein the fixing mechanism includes at least one guide body which can be guided in at least one guide recess.

Abstract: A laboratory instrument for mixing a medium in an object carrier, wherein the laboratory instrument includes a support body, a main component for receiving the object carrier which is disposed on the support body and is movable with respect to the support body for mixing, and a mixing drive mechanism disposed on the support body, with a drive device, a first eccentric and a second eccentric, which can be driven by means of the drive device and which are configured in order to transmit a driving force produced by the drive device to the main component in order to mix the medium in the object carrier, wherein the first eccentric and the second eccentric are disposed on a peripheral edge of the support body and outside a central region of the support body.