Abstract: A door opening detection device and a door opening recognition system are disclosed. The door opening recognition system comprises the door opening detection device and a robot. The door opening detection device is mounted to an inside door handle, and the robot comprises a communication module and performs a predetermined operation in an internal space located inside a door in a state where the door is closed. The door opening detection device is operated in a state where, when the door is closed, a door sensing unit connected to one end of a string is located inside the door and a tag connected to the other end of the string and connected to the door sensing unit is fixed to be located outside the door.

Abstract: A mobile terminal includes a terminal main body, a circuit board, an antenna device and a connecting portion. The terminal main body has a plurality of members. The circuit board and an antenna device are built in the terminal main body so as to be spaced apart from each other. The connecting portion electrically connects the circuit board and the antenna device to each other. In the mobile terminal, the connecting portion is a conductive pattern formed on one surface of at least one of the members defining an internal space of the terminal main body.