Blocking device for a damper drive with a transmission element rotating when the damper drive is actuated, wherein the blocking device, when triggered, is irreversibly transferrable from an initial state into an alternative blocking state, and the blocking device comprises: - a first blocking element and a second blocking element, wherein the first blocking element is movably mounted and is movable from a release position of the first blocking element, adopted in the initial state, in the direction of a blocking position of the first blocking element, and wherein the second blocking element is movably mounted separately from the first blocking element and is movable and from a release position of the second blocking element, adopted in the initial state, in the direction of a blocking position of the second blocking element, wherein the first blocking element and the second blocking element are each designed, in their respective release position, to allow a rotating movement of the transmission element and, in their respective blocking position, to block a rotating movement of the transmission element by engagement; - a drive device (43a, 43b), wherein the drive device (43a, 43b) acts on the first blocking element and the second blocking element with a force in the direction of their respective blocking position; - a retaining device (44, 45), wherein the retaining device (44, 45), in the initial state, holds the first blocking element and the second blocking element, in their respective release position, counter to the force exerted by the drive device (43a, 43b) on the first blocking element and the second blocking element; - a trigger device, wherein the trigger device irreversibly deactivates the retaining device (44, 45) when a triggering temperature is exceeded and/or when a triggering heat is applied, and the blocking device is thereby triggered. - a first blocking element and a second blocking element, wherein the first blocking element is movably mounted and is movable from a release position of the first blocking element, adopted in the initial state, in the direction of a blocking position of the first blocking element, and wherein the second blocking element is movably mounted separately from the first blocking element and is movable and from a release position of the second blocking element, adopted in the initial state, in the direction of a blocking position of the second blocking element, wherein the first blocking element and the second blocking element are each designed, in their respective release position, to allow a rotating movement of the transmission element and, in their respective blocking position, to block a rotating movement of the transmission element by engagement; - a drive device (43a, 43b), wherein the drive device (43a, 43b) acts on the first blocking element and the second blocking element with a force in the direction of their respective blocking position; - a retaining device (44, 45), wherein the retaining device (44, 45), in the initial state, holds the first blocking element and the second blocking element, in their respective release position, counter to the force exerted by the drive device (43a, 43b) on the first blocking element and the second blocking element; - a trigger device, wherein the trigger device irreversibly deactivates the retaining device (44, 45) when a triggering temperature is exceeded and/or when a triggering heat is applied, and the blocking device is thereby triggered.