Abstract: The trigger operated pumping mechanism for a fluid dispensing device comprises a body and the pumping mechanism comprises a cylinder in the body of the dispensing device, a piston received in the cylinder and having a piston rod extending outwardly therefrom to an outer end and a trigger movably mounted to the body and having a front side and a back side. A first coupling structure is provided on the outer end of the piston rod for coupling to the trigger. A second coupling structure is provided on the back side of the trigger for releasably coupling to the first coupling structure on the piston rod in a snap-fitting manner and a spring is provided outside of the cylinder for biasing the trigger away from the body.