The invention relates to a child safety seat (100) comprising an integral harness belt (102) for restraining a child in the child safety seat (100), a belt tension monitor (106) adapted for monitoring a belt tension acting on the harness belt (102), a motorized harness belt tensioner (104) comprising a tensioning element (114) driven by an electromechanical actuator (122) and adapted for adjusting the belt tension acting on the harness belt (102), and a controller adapted for controlling the motorized harness belt tensioner (104) to adjust the belt tension to match a first predefined belt tension and for monitoring the resulting belt tension using the belt tension monitor (106).

The invention relates to a child safety seat (100) comprising an integral harness belt (102) for restraining a child in the child safety seat (100), a belt tension monitor (106) adapted for monitoring a belt tension acting on the harness belt (102), a motorized harness belt tensioner (104) comprising a tensioning element (114) driven by an electromechanical actuator (122) and adapted for adjusting the belt tension acting on the harness belt (102), and a controller adapted for controlling the motorized harness belt tensioner (104) to adjust the belt tension to match a first predefined belt tension and for monitoring the resulting belt tension using the belt tension monitor (106).

An engagement and disengagement device used in a seat belt retractor includes a first rotating member and a second rotating member configured to be coaxial, and a transmission member disposed between the first and second rotating members. The first rotating member defines an engagement portion on a radial inner surface thereof, and the distance from the engagement portion to an axis of rotation gradually increases in a first direction of rotation. The transmission member can rotate between an engagement position and a non-engagement position relative to the first rotating member.

An engagement and disengagement device used in a seat belt retractor includes a first rotating member and a second rotating member configured to be coaxial, and a transmission member disposed between the first and second rotating members. The first rotating member defines an engagement portion on a radial inner surface thereof, and the distance from the engagement portion to an axis of rotation gradually increases in a first direction of rotation. The transmission member can rotate between an engagement position and a non-engagement position relative to the first rotating member.

A CPU of an ECU is configured to compute an estimated acceleration that is estimated to be applied to a vehicle and a remaining time that is taken from present time to acceleration occurrence time at which the estimated acceleration occurs from a road surface condition detected by a road surface condition detection unit and a vehicle status detected by a vehicle speed determination unit and a steering angle velocity determination unit. The CPU is configured to, when the remaining time becomes shorter than or equal to a predetermined value, drive a retractor motor. The webbing is retracted before an occupant moves with an acceleration that is applied to the vehicle, so the occupant is held in a normal seated position. The retractor motor is driven when the time that is taken from present time to acceleration occurrence time becomes shorter than or equal to the predetermined value.

A CPU of an ECU is configured to compute an estimated acceleration that is estimated to be applied to a vehicle and a remaining time that is taken from present time to acceleration occurrence time at which the estimated acceleration occurs from a road surface condition detected by a road surface condition detection unit and a vehicle status detected by a vehicle speed determination unit and a steering angle velocity determination unit. The CPU is configured to, when the remaining time becomes shorter than or equal to a predetermined value, drive a retractor motor. The webbing is retracted before an occupant moves with an acceleration that is applied to the vehicle, so the occupant is held in a normal seated position. The retractor motor is driven when the time that is taken from present time to acceleration occurrence time becomes shorter than or equal to the predetermined value.

A webbing take-up device is provided that includes a spool configured to take up a webbing of a seatbelt device, a rotating member configured to rotate the spool in the take-up direction, a tube-shaped cylinder, a moving member provided inside the cylinder that, when moved by a pressurized fluid, causes the rotating member to rotate by engaging with a side of the rotating member. At the end of its movement through the cylinder, the moving member abuts and moves a stopper inside a recess, suppressing movement of the moving member without an engaging member jabbing or biting into the moving member.

A restraining device control system includes: a restraining device that is provided at a vehicle seat and that restrains an occupant seated in the vehicle seat; a surrounding environment detection unit that detects an environment surrounding a vehicle; and a control unit that increases a restraining force on the occupant by the restraining device in a case in which it has been predicted, from the surrounding environment of the vehicle, that vacillation of the vehicle while in an autonomous driving mode will exceed a threshold amount and that decreases the restraining force on the occupant by the restraining device in a case in which it has been predicted, from the surrounding environment of the vehicle, that the vehicle will maintain a state in which vacillation of the vehicle while in the autonomous driving mode is less than the threshold amount.

An occupant protection device including a seat belt including a shoulder belt and a lap belt, a locking tongue that is detachably joined to a buckle, that allows the seat belt to pass therethrough, and that is capable of switching between an unlock state in which the seat belt is allowed to move with the locking tongue being between the shoulder belt and the lap belt and a lock state in which movement thereof is restricted, a shoulder-belt puller that is capable of pulling the shoulder belt to apply a tensile force thereto, a side-collision detector that detects a side collision or a precursor thereof, and a control unit that changes a state of the locking tongue into the lock state and causes the shoulder-belt puller to pull the shoulder belt when the side-collision detector detects the side collision that occurs opposite an occupant or the precursor thereof.

An occupant protection device including a seat belt including a shoulder belt and a lap belt, a locking tongue that is detachably joined to a buckle, that allows the seat belt to pass therethrough, and that is capable of switching between an unlock state in which the seat belt is allowed to move with the locking tongue being between the shoulder belt and the lap belt and a lock state in which movement thereof is restricted, a shoulder-belt puller that is capable of pulling the shoulder belt to apply a tensile force thereto, a side-collision detector that detects a side collision or a precursor thereof, and a control unit that changes a state of the locking tongue into the lock state and causes the shoulder-belt puller to pull the shoulder belt when the side-collision detector detects the side collision that occurs opposite an occupant or the precursor thereof.