SHOCK ABSORBING DEVICE FOR VEHICLE WITH MULTIPLE SHOCK ABSORBING STAGES

There is provided a collision energy absorbing apparatus, in paraticular, a collision energy absorbing apparatus for use in a vehicle, having a plurality of absorption phases, including: a first deformation part undergoing a first plastic deformation due to expansion so as to absorb collision energy generated in the event of a vehicle accident; a second transformation part disposed in line with an end of the first deformation part, the second transformation part undergoing a second plastic deformation after the first plastic deformation of the first deforamtion part so as to sequentially absorb collision energy in the event of a vehicle accident; and an expansion inducing part combined with an end of the second deformation part and disposed between the first deformation part and the second deformation part to guide the first plastic deformation of the first deformation part. Collision energy absorption performance per unit length may thereby be increased. Since absorption energy per unit length is high, the apparatus may be applied to vehicles having a short crash collapse distance such as in next-generation vehicles or the like, and passenger injuries can be reduced by significantly decreasing collision acceleration.