Seat belt warning device

A seatbelt warning apparatus comprising:

• a seatbelt configured to constrain a passenger seated on a vehicle seat when fastened and release the passenger when not fastened;
• a load detection unit configured to detect a load acting on a seat surface of the vehicle seat;
• a warning member configured to encourage fastening of the seatbelt according to the load detected by the load detection unit;
• and
• a control unit configured to bring the mode to one of a not-seated recognition mode which corresponds to a not-seated state, a passenger-seated recognition mode in which it is determined that the passenger is seated and the warning member is brought into an operation-permitted state, and a baggage recognition mode in which it is determined that a baggage is placed and the warning member is brought into an operation-not-permitted state, wherein
• the control unit performs a transition process configured to transfer the mode to the baggage recognition mode on the condition that the load detection unit detects a load larger than a first load and smaller than a second load continuously for a preset time in the not-seated recognition mode, and to the not-seated recognition mode on the condition that the load detection unit detects a load smaller than a predetermined load continuously for a preset time in the baggage recognition mode, and
• a transfer time t1 required for transferring to the baggage recognition mode in the transition process is set to be shorter than a time T required for increasing the load from the first load to the second load by the vehicle acceleration characteristics.