Printer device for printing a strip medium

A printer device for printing on a strip medium, the device comprising a body (1), a carriage (5) movable in translation along a guide (2) secured to the body (1) and carrying a pivoting print head (7), and resilient means (9) disposed between the carriage (5) and the print head (7), a cover (11) carrying a platen (13) and pivotally connected to the body (1) to pivot between an open position and a closed position in which the print head (7) is held pressed against the platen (13) by the resilient means (9), a locking member (17) carried by the body (1) in retractable manner between a first position in which it co-operates with an abutment (14) secured to the cover (11) and a second position in which it escapes from said abutment, the printer device being characterized in that the locking member (17) is secured to a lever (19) hinged to the body (1), said lever (19) having an end that co-operates with the print head (7) in such a manner that during the movement of the locking member (17) between its first and second positions, the end of the lever (19) causes the print head (7) to pivot against the effect of the resilient means (9).