Actuation device for a lifting system and lifting system for door leaves of furniture

An actuation device for a lifting system for door leaves of furniture, said actuation device comprising:

• a fixing plate that can be connected to the body of the piece of furniture,
• a supporting lever for the door leaf, which is connected, so that it can oscillate, to the fixing plate at a fulcrum and comprises, at the fulcrum, a connecting portion that extends eccentrically with respect to the fulcrum,
• elastic means that comprise a body for accommodating at least one elastic element,
• wherein
• the actuation device comprises an intermediate connecting lever that comprises two opposite ends, a first end of the intermediate connecting lever being coupled, so that it can oscillate, to the connecting portion of the supporting lever, at a first pivot,
• the body of said elastic means having at least one first end which is coupled, so that it can oscillate, to the fixing plate and a second, opposite end that has a second pivot, said body of said elastic means configured to rotate about an axis,
• a second end of the intermediate connecting lever being coupled, so that it can oscillate to the body of said elastic means, at the second pivot,
• said intermediate connecting lever comprising an actuation surface or cam which is arranged substantially at the second pivot,
• said elastic means further comprising a pusher that is supported so that it can move longitudinally by said accommodation body and is pressed by the at least one elastic element,
• said cam cooperating with said pusher.