Vehicle seatbelt apparatus, vehicle having the vehicle seatbelt apparatus and method for controlling vehicle seatbelt

A vehicle seatbelt apparatus comprising:

• a belt;
• a belt reel around which the belt is wound;
• position detecting means for detecting a rotational position of the belt reel;
• motor means for rotating the belt reel;
• clutch means for connecting or disconnecting the motor means and the belt reel;
• and
• control means for controlling the clutch means and a current supplied to the motor means and comprising:
• return amount detecting means for detecting a return amount of the belt reel in a drawing direction of the belt based on the rotational position of the belt reel detected by the position detecting means after the belt is wound around the belt reel and then the clutch means disconnects the motor means and the belt reel.

A vehicle comprising:

• a seatbelt apparatus comprising:
• a belt;
• a belt reel around which the belt is wound;
• a position detector configured to detect a rotational position of the belt reel;
• a motor configured to rotate the belt reel;
• a clutch configured to connect or disconnect the motor and the belt reel;
• and
• a control device configured to control the clutch and a current supplied to the motor and comprising:
• a return amount detector configured to detect a return amount of the belt reel in a drawing direction of the belt based on the rotational position of the belt reel detected by the position detector after the belt is wound around the belt reel and then the clutch disconnects the motor and the belt reel.

A method for controlling a vehicle seatbelt, comprising:

• detecting a rotational position of a belt reel around which a belt is wound;
• providing a motor to rotate the belt reel;
• providing a clutch to connect or disconnect the motor and the belt reel;
• controlling the clutch and a current supplied to the motor;
• and
• detecting a return amount of the belt reel in a drawing direction of the belt based on the rotational position of the belt reel after the belt is wound around the belt reel and then the clutch disconnects the motor and the belt reel.