The invention relates to a method for triggering protective means, in particular an airbag and/or a belt tensioner, in a child restraint device, in particular according to one of claims 18 to 20, comprising the steps of: a) determining at least one measurement direction and/or a measurement direction corridor; b) receiving acceleration sensor signals from at least two acceleration sensors (74x, 74y, 74z), which are preferably orientated differently; c) calculating at least one first acceleration value (aX) along the measurement direction and/or within the measurement direction corridor; d) determining a triggering signal based at least on the at least one first acceleration value (aX); e) triggering at least one protective means based on the triggering signal.