Patent ID: 8898956

Claim:
A sliding door device for a vehicle, comprising: a sliding door configured to slidingly move; a door weather strip attached to the sliding door; a pressure switch configured to sense an internal pressure of the door weather strip; a pneumatic line connecting the door weather strip and the pressure switch to communicate with each other; an electronic control unit (ECU) configured to receive a switching signal from the pressure switch to control opening and closing of the sliding door; and an opening and closing valve configured to cause the pneumatic line to communicate with atmospheric pressure or cause the pneumatic line to be blocked from the atmospheric pressure, wherein: a holder is disposed on the sliding door, the door weather strip comprises: a base disposed into the holder; a pressure sensing unit integrated with the base, extending from the base and having a hollow closed section; and an elastic sealing unit integrated with the base, extending from the base and protruding above the pressure sensing unit, and the elastic sealing unit comprises: a circular sealing unit having a circular hollow closed section; and an elastically curved lever connecting the circular sealing unit and the base, the base is connected between the circular sealing unit and the pressure sensing unit such that the circular sealing unit is free of contact with the pressure sensing unit when no external force is applied to the circular sealing unit, and when an external force is applied to the circular sealing unit, the circular sealing unit is bent toward an outside of a vehicle compartment to be in contact with the pressure sensing unit by the lever.