Coupling device between an elevator car door and a landing door and elevator system

A linkage device used between an elevator car door and a hall door, comprising:

• a link mechanism;
• a first door vane and a second door vane that are connected to the link mechanism;
• and
• an actuating mechanism for actuating the link mechanism so that the first door vane and the second door vane are switched between a contracted position and an expanded position;
• characterized in that the link mechanism comprises:
• a first link and a second link, wherein the first link and the second link are arranged in parallel, and each of the first link and the second link comprises a link body and a slider;
• the link body of the first link and the link body of the second link are pivotally connected to the car door, and the slider of the first link and the slider of the second link are each configured to slide along a passage defined by the corresponding link body;
• and the slider of the first link and the slider of the second link each comprise a first end pivotally connected to the first door vane and a second end pivotally connected to the second door vane.