Self-locking type shutter device

A self-locking gate device, installed in a financial self-service instrument and configured to open or close a cash inlet/outlet of the financial self-service instrument, wherein the self-locking gate device comprises:

• an integral welded frame;
• a door installed on the frame through a first rotation shaft and being rotatable around the first rotation shaft;
• and
• a power transmission mechanism fixed on the frame and providing a power for a rotation of the door;
• wherein the power transmission mechanism comprises an electric motor and a pair of one-way foldable connecting rod mechanisms, each of the one-way foldable connecting rod mechanisms comprises a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are hinged together through a second shaft, the other end of the first connecting rod is connected to the door through a third shaft, the third shaft and the first rotation shaft are disposed in parallel and are respectively located at two opposite ends of the door, the other end of the second connecting rod is connected to the electric motor through a fourth shaft, the electric motor drives and rotates the fourth shaft, the second connecting rod and the fourth shaft are fixedly connected together via a rod embracing structure, and the second connecting rod is configured to clamp the fourth shaft through a screw, and the pair of one-way foldable connecting rod mechanisms are connected between the door and the fourth shaft, and the pair of one-way foldable connecting rod mechanisms are symmetrically located at two ends of the fourth shaft;
• and
• an end of the first connecting rod adjacent to the second shaft has a first end surface, and an end of the second connecting rod adjacent to the second shaft has a second end surface, when the cash inlet/outlet of the financial self-service instrument is closed by the door, the first end surface and the second end surface abut against each other, so as to stop a folding operation formed by rotating the first connecting rod in a clockwise direction and rotating the second connecting rod in a counterclockwise direction;
• when the cash inlet/outlet is closed by the door, the second shaft is located below a connecting line A between axes of the third shaft and the fourth shaft, a connecting line between axes of the second shaft and the fourth shaft is indicated as B, and a separation angle formed between connecting lines A and B is larger than 0 degree and smaller than or equal to 10 degrees;
• and
• a torsion spring is provided on the third shaft, an end of the torsion spring is fixedly connected to the door, the other end of the torsion spring is fixed in a location groove formed in an upper side surface of the first connecting rod, the torsion spring is configured to exert a force to the first connecting rod so as to urge the first connecting rod to rotate around the third shaft in the clockwise direction.