Abstract: A control button (12) for a manually actuated sampling pipette, the button including lower and upper parts (24a, 24b), one of which is equipped with a force sensor (31) and the other with an actuating member (30). In the vertical position of the button, in a state not subjected to a force, not only does the member (30) ensure that the upper part is retained axially on the lower part (24a), but these parts also define a circular axially retaining connection (42) therebetween, the circular connection exhibiting an axial clearance (47) configured such that, when a pressure is exerted on an off-centre action zone (102a) by the thumb of an operator, the axial clearance (47) is taken up in this zone (102a), while the connection (42) retains a reaction zone (102b), arranged diametrically opposite the action zone (102a), axially and locally relative to the lower part (24a).

Abstract: An assembly (3) for an ergonomic sampling pipette including a control rod (10) at the end of which is arranged a control button (12) for controlling the movement of the control rod (10) along a longitudinal axis (18) thereof, the button (12) having a pressure surface (11) for receiving the thumb of an operator. The pressure surface (11) of the control button (12) is movable such as to be able, during operation, to assume multiple angles relative to the longitudinal axis (28) of the control rod (10).

Abstract: An assembly (3) for an ergonomic sampling pipette including a control rod (10) at the end of which is arranged a control button (12) for controlling the movement of the control rod (10) along a longitudinal axis (18) thereof, the button (12) having a pressure surface (11) for receiving the thumb of an operator. The pressure surface (11) of the control button (12) is movable such as to be able, during operation, to assume multiple angles relative to the longitudinal axis (28) of the control rod (10).