Reaserch On Key Technology Of Integrated Child Safety Seat

The safety of child passengers is an important problem to be solved in the field of impact safety. The injury and death rate of children could be decreased significantly by using child safety seat correctly. The traditional booster is an unattached device and should be fixed on the car seat via the adult safety belt or additional fix system. The process is troublesome and may result in the misuse if without correct instruction.The integrated child safety seat, also called built-in child safety seat, was designed integrated with the vehicle seat. The child can be seated on the raised part of the seat and restrained by adult safety belt, so the misuse of the child safety seat can be avoided effectively. Recently, some kinds of integrated child safety seat have developed. Some shortages are existed. For example, the handling is complex; the height of booster can not be adjusted continuesly; the length of booster cann't be adjusted; the integrated seat will influence the use of adults and the side impact safety is not be considered.A new integrated child safety seat for enhancing the overall safety of children aged approximately from 3 to 10 years old is presented and studied in this paper. The booster of the seat locates at the middle of the rear seat. Therefore, it has the best crash safety potential and will not influence the comfortableness of the adults when they sit on the two sides. The height of the booster can be adjusted continuously according to the height of the child passenger. In comparison with the ordinary child booster seats, it needs not be installed, so the misuse of the child seats can be avoided significantly. Some new designs have been presented and stuctural design has been conducted. Meanwile, a sample was manufactured and a rear seat was refitted to the integrated child safety seat. Sled test with the new integrated child safety seat was conducted to study the protect performance of the new device. The test results also provide a support for the simulation study.The multi-rigid body simulation models of the integrated child safety seat were developed using MADYMO software. The modle has been validated according to the test. Then, the key parameters of this integrated child safety seat were studied according to the responses of child dummy, such as the booster height, the upper anchorage point position of the belt, the belt guide loop position and the booster length. Besides, the 3 and 10 years old child dummy models were used to investigate the performance of the seat in frontal impact for children aged from 3 and 10. Side impact simulation modle was also established and the protect effect for children in lateral impact was discussed.The results indicated that this new type of integrated child safety seat could be adjusted continuestly and the fit of the adults'safety belts on children could be improved. To some extent, the new integrated child safety seat can provide effective protection for the children aged approximately from 3 to 10 years old in frontal and lateral impact.The research results had reference value on the study of children passenger safety and injury prevention technology in china.