A damping device , comprising: a housing having an inner wall , a chamber being defined by the inner wall and having a damping medium filled therewith; a piston movable in the chamber of the housing , the piston comprising at least one passage for allowing the damping medium to pass through, wherein the piston is configured to be moved in the chamber of the housing in a substantially linear direction; and a controller disposed in the chamber of the housing , the controller comprising a control member and a separate resilient member , wherein a space is defined by the control member , the space is configured to accommodate the resilient member , wherein the resilient member is a disc spring; wherein when the piston is moved relative to the housing by a damping speed, the control member is moved toward the passage of the piston or closes a portion or all portions of the passage of the piston in response to the damping speed; wherein when the control member closes the portion or the all portions of the passage of the piston , the control member is capable of controlling an amount of the damping medium passing through the passage of the piston ; wherein the resilient member is configured to generate a resilient force (F3) to the control member in response to the damping speed, the damping device further comprises a base movable in the chamber , and the controller is disposed between the piston and the base , wherein the base is connected to the piston through an extending portion , and the controller is movably mounted on the extending portion , the control member and the resilient member are located between the piston and the base , the control member and the resilient member are movable between the base and the piston . a housing having an inner wall , a chamber being defined by the inner wall and having a damping medium filled therewith; a piston movable in the chamber of the housing , the piston comprising at least one passage for allowing the damping medium to pass through, wherein the piston is configured to be moved in the chamber of the housing in a substantially linear direction; and a controller disposed in the chamber of the housing , the controller comprising a control member and a separate resilient member , wherein a space is defined by the control member , the space is configured to accommodate the resilient member , wherein the resilient member is a disc spring; wherein when the piston is moved relative to the housing by a damping speed, the control member is moved toward the passage of the piston or closes a portion or all portions of the passage of the piston in response to the damping speed; wherein when the control member closes the portion or the all portions of the passage of the piston , the control member is capable of controlling an amount of the damping medium passing through the passage of the piston ; wherein the resilient member is configured to generate a resilient force (F3) to the control member in response to the damping speed, the damping device further comprises a base movable in the chamber , and the controller is disposed between the piston and the base , wherein the base is connected to the piston through an extending portion , and the controller is movably mounted on the extending portion , the control member and the resilient member are located between the piston and the base , the control member and the resilient member are movable between the base and the piston . <EOS>