Seatbelt device

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• and
• a controller for rotating the motor in order to at least retract the webbing and for generating an alarm;
• wherein the controller executes a control program for setting a threshold value of alarm generation, and executes a protraction frequency program for determining a webbing protraction frequency while the seatbelt device is fastened;
• wherein the controller controls an ease of alarm generation by altering the threshold value on a basis of the protraction frequency determined by the frequency program.

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• a first controller for rotating the motor in order to at least retract the webbing;
• and
• a second controller for either generating a collision danger alarm when a distance between a vehicle of the passenger and an object ahead becomes less than a specified value or a dozing alarm by determining an indication of dozing by the passenger of the vehicle;
• wherein the first controller alters an amount of slack of the webbing while the webbing is fastened, on a basis of a number of alarm generation times with regard to at least either the collision danger alarm or the dozing alarm.

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• a first controller for rotating the motor in order to at least retract the webbing;
• and
• a second controller for either generating a collision danger alarm when a distance between a vehicle of the passenger and an object ahead becomes less than a specified value or a dozing alarm by determining an indication of dozing by the passenger of the vehicle;
• wherein the first controller alters a tension of the webbing while the webbing is fastened, on a basis of a number of times of alarm generation with regard to at least either the collision danger alarm or the dozing alarm.

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• a first controller for rotating the motor in order to at least retract the webbing;
• and
• a second controller for either generating a collision danger alarm when a distance between a vehicle of the passenger and an object ahead becomes less than a specified value or a dozing alarm by determining an indication of dozing by the passenger of the vehicle;
• wherein the first controller alters a retraction power of the webbing while the webbing is fastened, on a basis of a number of alarm generation times with regard to at least either the collision danger alarm or the dozing alarm.

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• a first controller for rotating the motor in order to at least retract the webbing;
• and
• a second controller for either generating a collision danger alarm when a distance between a vehicle of the passenger and an object ahead becomes less than a specified value or a dozing alarm by determining an indication of dozing by the passenger of the vehicle;
• wherein the first controller generates an alarm by rotating the motor to alternately and repeatedly protract and retract the webbing;
• and wherein the first controller alters a vibration cycle of the alarm on a basis of a number of times of alarm generation with regard to at least either the collision danger alarm or the dozing alarm.

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• and
• a controller for rotating the motor in order to at least retract the webbing and for generating an alarm;
• wherein the controller executes a control program for setting a threshold value of alarm generation, and executes a seatbelt-fastened-state duration program;
• wherein the controller controls an ease of alarm generation by altering the threshold value on a basis of a seatbelt-fastened-state duration determined by the seatbelt-fastened-state duration program.

A seatbelt device comprising:

• a retractor using a motor for retracting and protracting a webbing that secures a passenger to a seat;
• and
• a controller for rotating the motor in order to at least retract the webbing,
• wherein the controller executes a program for determining a number of times that the seatbelt device in an unfastened state turns into a fastened state;
• and
• wherein the controller alters a retraction power of the webbing on a basis of the number of times a change of state is determined by the program.