Abstract: A seatbelt retractor and method of incorporating a spindle into a retractor frame. The seatbelt retractor includes a spindle having a recessed portion in a cylindrical surface for retracting a webbing, and a retractor frame including two flat plate-shaped side walls that are provided in parallel via an interval (A) in order to support the spindle, each of the two side walls being provided with a circular through hole having a diameter (C). An element on a first end of the spindle is contained within a range of a distance (D) from a deepest portion of the recessed portion, and an element on a second end of the spindle is contained within a range of a distance (B) from the deepest portion of the recessed portion. The distance (D) is smaller than the height (C), and the distance (B) is smaller than the interval (A).

Abstract: A clutch includes a clutch housing that rotates with a spindle and has inner teeth; a pair of pawls that can engage with the inner teeth; a gear wheel that is joined to a motor and has a pair of sliding grooves that hold the pawls such that the pawls can move in the sliding grooves between a first position when the motor is not operating, a second position at which the pawls engage with the inner teeth of the clutch housing through operation of the motor, and a third position at which the pawls become positioned on the opposite side to that of the second position across the first position upon operation of the pretensioner; and a return prevention mechanism that prevents the pawls from returning to the first position and the second position after having moved to the third position.

Abstract: A clutch includes a clutch housing that rotates with a spindle and has inner teeth; a pair of pawls that can engage with the inner teeth; a gear wheel that is joined to a motor and has a pair of sliding grooves that hold the pawls such that the pawls can move in the sliding grooves between a first position when the motor is not operating, a second position at which the pawls engage with the inner teeth of the clutch housing through operation of the motor, and a third position at which the pawls become positioned on the opposite side to that of the second position across the first position upon operation of the pretensioner; and a return prevention mechanism that prevents the pawls from returning to the first position and the second position after having moved to the third position.

Abstract: A seatbelt retractor and method of incorporating a spindle into a retractor frame, even when an additional component having a larger diameter than a spindle, such as a load limiter mechanism, is attached to the spindle. The seatbelt retractor includes a spindle having a recessed portion in a cylindrical surface for retracting a webbing, and a retractor frame including two flat plate-shaped side walls that are provided in parallel via an interval A in order to support the spindle, each of the two side walls being provided with a circular through hole having a diameter C. An element on a first end of the spindle is contained within a range of a distance D from a deepest portion of the recessed portion, and an element on a second end of the spindle is contained within a range of a distance B from the deepest portion of the recessed portion. The distance D is smaller than the height C, and the distance B is smaller than the interval A.