A fluid dispenser comprising a fluid reservoir (R) in which the fluid is stored under pressure, and a fluid outlet valve that is actuatable from a closed position to an open position so as to define a dispenser orifice (62), the outlet valve including a movable member (51) that bears in sealed manner against a seat (63) in the closed position and that is not in contact with the seat (63) in the open position, the movable member (51) being axially movable and resiliently biased against the seat (63), the dispenser also comprising an actuator member (61) for moving the movable member (51) between the closed and open positions, the fluid dispenser being characterized in that the dispenser orifice (62) and the actuator member (61) are both formed by a rotary disk (6).

A glue gun, including: a main body with one end formed as an accommodation part for accommodating a glue cylinder; a fixed handle connected to another end of the main body; a movable handle pivotally connected to the fixed handle; a push rod with one end located in the accommodation part; a brake provided on the push rod; and a movable member provided on the main body, where the movable member is configured to lock the brake, so as to continuously apply a force on the glue cylinder, and release the brake to release the force applied by the brake on the glue cylinder.