A seat belt pull through device for a car seat used in a vehicle. It allows an occupant, a child, to remain comfortably in a semi-erect or upright position while placed in a toddler or infant car safety seat. The device facilitates fast and easy installation of the car seat and connection of the car seat to the existing seat and shoulder belts already with the vehicle. It greatly simplifies the insertion of the vehicle belts through the car seat and removes the cumbersome and tiresome fishing of a limp belt through the tight, small openings in the car seat structure. The device includes an extended sheath with a hook and protector flaps to enable the vehicle belt to be inserted into a seat belt slot of the car seat, pushed through and removably connected to the seat belt system of the entire vehicle.

A seat belt pull through device for a car seat used in a vehicle. It allows an occupant, a child, to remain comfortably in a semi-erect or upright position while placed in a toddler or infant car safety seat. The device facilitates fast and easy installation of the car seat and connection of the car seat to the existing seat and shoulder belts already with the vehicle. It greatly simplifies the insertion of the vehicle belts through the car seat and removes the cumbersome and tiresome fishing of a limp belt through the tight, small openings in the car seat structure. The device includes an extended sheath with a hook and protector flaps to enable the vehicle belt to be inserted into a seat belt slot of the car seat, pushed through and removably connected to the seat belt system of the entire vehicle.

A restraint system includes a first member including a first hole and fixable to a seat frame, a second member including a second hole and slidably coupled to the first member between a retracted position in which the first and second holes are aligned and an extended position in which the first and second holes are spaced from each other, a buckle housing fixed to the second member, and a tongue including a third hole and insertable into the buckle housing to an inserted position in which the second and third holes are aligned.

In a lift-up buckle device, a slider and a shoe move forward and a buckle is moved to a stowed position. The shoe impacts against a protruding portion at a lower portion of a damper and interferes with a housing via the lower portion of the damper. Thus, the forward movement of the slider and shoe is stopped, while the damper absorbs an impact against the slider and shoe. Therefore, an amount of the impact against the slider and shoe that is absorbed by the damper may be increased by the protruding portion, and the damper may absorb the impact against the slider and shoe effectively.

In a lift-up buckle device, a slider and a shoe move forward and a buckle is moved to a stowed position. The shoe impacts against a protruding portion at a lower portion of a damper and interferes with a housing via the lower portion of the damper. Thus, the forward movement of the slider and shoe is stopped, while the damper absorbs an impact against the slider and shoe. Therefore, an amount of the impact against the slider and shoe that is absorbed by the damper may be increased by the protruding portion, and the damper may absorb the impact against the slider and shoe effectively.

In a lift-up buckle device, a movement resistance adjustment portion is provided on an outer circumferential surface of a drive screw. The movement resistance adjustment portion is formed by a first screw segment, a second screw segment, and a third screw segment on which are formed male screw threads that each have mutually different thread precisions. Because of this, when, as a result of the drive screw being rotated, a slider is moved in the longitudinal direction of the drive screw, the ease with which the drive screw can be rotated changes in accordance with the respective thread precisions of the first screw segment, the second screw segment, and the third screw segment.

A seat belt for an occupant sitting on a seat in a vehicle includes a tongue part provided at a first side portion of the seat and a buckle part provided at a second side portion of the seat. The tongue part includes at least one first guide part that is operable between extended and contracted configurations, and at least one first webbing with a tongue wound therein. In addition, the tongue of the first webbing is connected with an end portion of the first guide part. The buckle part includes a second guide part that is operable between extended and contracted configurations, and the second webbing with a buckle wound therein. In addition, the buckle of the second webbing is connected with an end portion of the second guide part. The tongue of the tongue part is fastened to the buckle of the buckle part.

An advanced four-point seat belt may include: a three-point seat belt to diagonally hold a passenger with a webbing; and a motorized seat belt to allow a tongue of the webbing to maintain a state of being fixed to a side surface of a seat cushion to an initial position. In particular, when a vehicle collision situation is recognized, the motorized seat belt forms an X shape webbing confinement state by withdrawing the webbing and another webbing to locate the tongue at a central position of a body of the passenger.

Provided is a belt assist device having a compact configuration and being configured to move a seatbelt to an easily reachable position. A vehicle seat includes a belt assist device attached to a lateral portion of a seat back and configured to move a portion of a seatbelt placed on the lateral portion to the easily reachable position. The belt assist device includes a rotary member attached to a recessed housing portion of the lateral portion via a rotary shaft and configured to rotate up and down between a housing position at which the rotary member is housed in the seat back and a protruding position at which the rotary member rotates to protrude forward of the seat back to push out a portion of the seatbelt. The rotary member is disposed forward of a belt guide provided at the periphery of an upper end of the seat back.

Provided is a belt assist device having a compact configuration and being configured to move a seatbelt to an easily reachable position. A vehicle seat includes a belt assist device attached to a lateral portion of a seat back and configured to move a portion of a seatbelt placed on the lateral portion to the easily reachable position. The belt assist device includes a rotary member attached to a recessed housing portion of the lateral portion via a rotary shaft and configured to rotate up and down between a housing position at which the rotary member is housed in the seat back and a protruding position at which the rotary member rotates to protrude forward of the seat back to push out a portion of the seatbelt. The rotary member is disposed forward of a belt guide provided at the periphery of an upper end of the seat back.