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(1) Seat assembly static strength standard
Europe began to develop passive safety regulations (ECE) from the 20th century to the late 1960s. o ECE regulations are revised according to US regulations and according to the characteristics of Europeans. It is also a relatively complete passive safety regulation system in the world. In the ECE regulations, in addition to ECER17 (car seat, headrest and fixture regulations), there are some regulations related to car seat systems such as the car seat system ECER80.
The United States was the first country to study the passive safety of cars. So far, in the Federal Motor Vehicle Safety Regulations (FMVSS), there are 26 regulations on passive safety, of which there are two regulations related to the seat, namely the FMVSS207 seat system standard and the FMVSS202 head restraint standard. For the static strength of the seat assembly, the FMVSS 207 specifies that the seat should be able to withstand the above loads when the load is applied horizontally forward and backward by 20 times the total mass of the seat at the center of mass of the seat assembly. For the seat assembly, GB15083-1994 stipulates that, by the center of mass of the seat, a force equivalent to 20 times the weight of the seat assembly is applied horizontally forward and backward, respectively, and the seat assembly and the body of the vehicle are not separated. For the adjustable seat, the adjustment device keeps the seat in the original adjustment position during the test and allows the adjustment ability to be lost after the test.
(2) Seat back static strength standard
For the seat back, it is specified in FMVSS 207 that when a load of 372 Nm is applied to the seat back, the seat should be able to withstand the above load. ECER17 stipulates that a load of 530 Nm shall be applied to the seat back; the seat shall be capable of withstanding the above loads; the seat frame, the seat fixing point and the displacement system, the adjustment system or the locking system shall not be ineffective after the test and during the test.
In our standard GB15083-1994, when the seat assembly is subjected to a force of 373 Nm with respect to the seat R point, the seat frame should not be damaged and the seat assembly and the body body should not be separated. For adjustable seats, the adjustment device should be able to maintain the original adjustment position during the test and allow for loss of adjustment after the test.
(3) Seat headrest static strength standard
The seat headrest is an important safety component of the car seat. Therefore, countries have made relevant regulations on the strength of the seat assembly, and separately specified the amount of backrest and static strength of the seat headrest. For the amount of backrest movement of the seat headrest, FMVSS202 stipulates that the headrest should not exceed 102 mm when the headrest is subjected to a torque of 372 N.m with respect to the point R of the seat reference point.
ECER25 stipulates that the seat headrest should be applied with respect to the seat reference point R point and the torque of 373N.m. At the same time, the backrest of the seat should also bear the R point relative to the seat reference point, and the size is 373N. The torque of m, at this time, the back shift of the seat headrest should not exceed 102 mm. The GB 11550-1995 stipulates that the seat is loaded with a false back, so that the rollover torque around the H point is 373 N.m. On this basis, when the headrest is subjected to a torque of 372 N.m with respect to the point R of the seat reference point, the maximum back shift of the headrest should not exceed 102 mm.
For the static strength of the headrest, the FMVS 5202 stipulates that the seat headrest should be able to withstand a load of 890 N, allowing the seat or seat back to be damaged.
China's GB 11550-1995 stipulates that the seat headrest should be able to withstand a load of 890 N, allowing the seat or seat back to be damaged.
