Fluid product dispensing device

A fluid dispenser device including a body (10) that is provided with a dispenser orifice (1), said body (10) containing a plurality of reservoirs (21) formed on a common substrate formed by an elongate strip (20) that includes a leading end (25) and a trailing end (28), the device further including reservoir-opening means (30) that are adapted to open a respective reservoir each time the device is actuated, and drive means (40) for driving the elongate strip (20), so as to bring a full reservoir into register with said opening means before, during or after each actuation of the device, said device comprising at least one movable wall (500;

• 600, 601) that separates, at least in part, a storage housing (11) for storing the elongate strip (20) from a reception housing (15) for receiving the elongate strip (20), said elongate strip (20) being disposed mainly in said storage housing (11) before the device is used for the first time, and being displaced progressively in said reception housing (15) each time the device is actuated, said at least one movable wall (500) causing the volume of the storage housing (11) to decrease progressively, and the volume of the reception housing (15) to increase progressively, said at least one movable wall including two pivot walls (600, 601) one of which (600) is concave relative to the reception housing (15) and the other one of which (601) is concave relative to the storage housing (11);
• wherein the two pivot walls are displaced under the effect of a corresponding thrust exerted thereon by the elongate strip;
• and
• said two pivot walls slide one against the other while pivoting about a respective pivot, a free end of one of the two pivot walls extending generally toward the respective pivot of the other of the two pivot walls.