Shock absorbing device and vehicle

1 . A shock absorbing device, comprising:

an elastic member which is configured to be contracted by a force transferred from a vehicle outside through a vehicle exterior member and to return the vehicle exterior member to the vehicle outside by a restoration force against a contraction of the elastic member, and

an attenuation device for attenuating a speed when the vehicle exterior member returns by the restoration force, wherein

the attenuation device includes an air damper forming a first air chamber at one end side of a cylinder with a piston therebetween and a second air chamber at the other end side of the cylinder with the piston therebetween,

the attenuation device is configured to generate:

a first attenuation force by limiting an amount of air flowing from the first air chamber to the second air chamber in response to a movement of the piston when the elastic material is contracted by a force from the outside the vehicle, and

a second attenuation force through a resistance generated by limiting an amount of air flowing from the second air chamber to the first air chamber in response to a movement of the piston when the vehicle exterior member is returned by a restoration force of the elastic member which has been contracted by the force from the outside the vehicle, and

the first attenuation force is different from the second attenuation force.

2 . The shock absorbing device according to claim 1 , wherein the elastic member is housed in the cylinder.

3 . The shock absorbing device according to claim 1 , further comprising

an operation regulation device configured to operate such that

when a force transferred from the vehicle exterior through the vehicle exterior member is less than a predetermined value, a contraction operation of the elastic member is limited, and

when the force is more than the predetermined value, a contraction operation of the elastic member is permitted.

4 . The shock absorbing device according to claim 1 , wherein the shock absorbing device is configured to be installed between the vehicle exterior member to which a radar device and/or sensor is provided and a vehicle body.

5 . A vehicle provided with a shock absorbing device, comprising:

an elastic member which is configured to be contracted by a force transferred from a vehicle outside through a vehicle exterior member and to return the vehicle exterior member to the vehicle outside by a restoration force against a contraction of the elastic member, and

an attenuation device for attenuating a speed when the vehicle exterior member returns by the restoration force, wherein

the attenuation device includes an air damper forming a first air chamber at one end side of a cylinder with a piston therebetween and a second air chamber at the other end side of the cylinder with the piston therebetween,

the attenuation device is configured to generate:

a first attenuation force by limiting an amount of air flowing from the first air chamber to the second air chamber in response to a movement of the piston when the elastic material is contracted by a force from the outside the vehicle, and

a second attenuation force through a resistance generated by limiting an amount of air flowing from the second air chamber to the first air chamber in response to a movement of the piston when the vehicle exterior member is returned by a restoration force of the elastic member which has been contracted by the force from the outside the vehicle, and

the first attenuation force is different from the second attenuation force.

6 . The vehicle according to claim 5 , comprising a plurality of the shock absorbing devices, wherein

attenuation forces generated by the plurality of the shock absorbing devices are changed according to a kind of a vehicle exterior member corresponding thereto and a position relative to the vehicle exterior member.

7 . The shock absorbing device according to claim 1 , wherein the second attenuation force is larger than the first attenuation force.