A locking web retractor includes a frame including spaced-apart side walls, a spool rotatably mounted between the side walls, the spool rotatable in a web take-up pay out directions, locking components operatively coupled to the spool, a ferromagnetic component movable relative to the locking components between an unlocking position in which the ferromagnetic component does not cause the locking components to prevent the spool from rotating in the web pay out direction and a locking position in which the ferromagnetic component causes the locking components to prevent the spool from rotating in the web pay out direction, a magnet responsive to actuation to cause the ferromagnetic component to move from the unlocking position to the locking position to cause the locking components to prevent the spool from rotating in the web pay out direction, and means for actuating the magnet.

A locking web retractor includes a frame including spaced-apart side walls, a spool rotatably mounted between the side walls, the spool rotatable in a web take-up pay out directions, locking components operatively coupled to the spool, a ferromagnetic component movable relative to the locking components between an unlocking position in which the ferromagnetic component does not cause the locking components to prevent the spool from rotating in the web pay out direction and a locking position in which the ferromagnetic component causes the locking components to prevent the spool from rotating in the web pay out direction, a magnet responsive to actuation to cause the ferromagnetic component to move from the unlocking position to the locking position to cause the locking components to prevent the spool from rotating in the web pay out direction, and means for actuating the magnet.

A webbing take-up device that includes: a cut-off section that cuts off transmission of rotation load along a rotation force transmission route from a second rotation force transmission mechanism to a spool via a first rotation force transmission mechanism due to the rotation load in a pull-out direction becoming a predetermined value or greater; and a resistance section that resists the rotation load during transmission of the rotation load, and that suppresses transmission of the rotation load along the rotation force transmission route in a case in which the rotation load is less than the predetermined value.

A webbing take-up device that includes: a cut-off section that cuts off transmission of rotation load along a rotation force transmission route from a second rotation force transmission mechanism to a spool via a first rotation force transmission mechanism due to the rotation load in a pull-out direction becoming a predetermined value or greater; and a resistance section that resists the rotation load during transmission of the rotation load, and that suppresses transmission of the rotation load along the rotation force transmission route in a case in which the rotation load is less than the predetermined value.

A webbing take-up device includes a second clutch that transmits rotation of a motor to a spool. The second clutch includes a base including a first spring catch portion, a clutch gear, a clutch spring including a coil portion, having an end portion at one side caught to the first spring catch portion, and a lever that includes a second spring catch portion catching an end portion at another side of the clutch spring, and that enlarges diameter of the coil portion to abut the clutch gear by moving the end portion at the another side of the clutch spring toward one side in the circumferential direction of the base. A terminal end of the end portion at the one side of the clutch spring abuts the first spring catch portion when the lever is rotated toward the one side in the circumferential direction of the base.

In a belt retractor (10) for a seat belt comprising a belt reel (12) onto which webbing (14) can be wound while being spring-loaded and comprising a tensioning device (16) which is adapted to act on the belt reel (12) in a winding direction (A), a control (18) is provided which is adapted to activate the tensioning device (16) when the seat belt is unloaded and not fastened.