Seat belt retractor and seat belt apparatus employing seat belt retractor

A seat belt retractor including a spool that retracts a seat belt that restricts an occupant, the seat belt retractor comprising:

• a vehicle sensor that operates in an emergency in which a deceleration that is larger than a deceleration applied to a vehicle at normal times is applied, the vehicle sensor having a function of stopping rotation of the spool in a seat belt withdrawal direction;
• a webbing sensor that operates when the seat belt is rapidly withdrawn at a rate that is larger than a withdrawal rate at normal times, the webbing sensor having a function of stopping the rotation of the spool in the seat belt withdrawal direction;
• a vehicle sensor function/webbing sensor function cancellation control mechanism that controls cancellation of the function of the vehicle sensor and cancellation of the function of the webbing sensor;
• and
• a cancellation-cancelling prevention unit that, when a large load with respect to a load applied at normal times is applied to the vehicle sensor function/webbing sensor function cancellation control mechanism from the vehicle sensor while in a state in which the vehicle sensor function/webbing sensor function cancellation control mechanism has canceled the function of the vehicle sensor and the function of the webbing sensor, that controls the cancellation of the function of the vehicle sensor and of the webbing sensor due to the large load performed by the vehicle sensor function/webbing sensor function cancellation control mechanism,
• a control cam member that controls an operation of the vehicle sensor function/webbing sensor function cancellation control member by rotating together with the rotation of the spool, and,
• wherein the vehicle sensor function/webbing sensor function cancellation control member is a control lever that is operated and controlled by the control cam member, the control lever including a first lever that cancels the function of the vehicle sensor and a second lever that is coaxially connected to the first lever to be movable relative to the first lever and that cancels the function of the webbing sensor.