(1) Seat belt design elements Seat belts should be designed to meet the requirements of occupant protection performance, reminder to use seat belts, and comfort and convenience. The design means to achieve the above points are the selection of the position of the seat belt adjuster, the specifications of the seat belt and the auxiliary devices used.
(2) Occupant protection performance The occupant protection performance requirements of the car seat belt are as follows: restrain the occupants as soon as possible; minimize the pressure on the occupants during restraint; keep the restraint position unchanged, so that the restraining force avoids the weaker parts of the human body . As a means to achieve the above objectives, the use of the pretensioner and force limiter described above has significantly improved the performance in these aspects.
