A suspension for a vehicle includes a lower arm part, an elastically deformable elastic part mounted over the lower arm part, a vehicle body part mounted over the elastic part, a first pad part interposed between the lower arm part and the elastic part and including an elastically deformable material, and a second pad part interposed between the elastic part and the vehicle body part and including an elastically deformable material.

A flocked spring (30) comprises: a spring body (31); a coating layer (32) arranged on the surface of the spring body (31); an adhesive layer (33) arranged on the surface of the coating layer (32); and a flocking layer (34) consisting of flocking fillers affixed to the adhesive layer (33). The adhesive layer (33) is formed of an adhesive composition containing an adhesive and a thixotropy-imparting agent. In this flocked spring (30), the thickness of the adhesive layer (33) can be increased, and the number of flocking fillers that constitute the flocking layer (34) can be increased. Consequently, the flocked spring causes less damage to a counterpart member.

A spring structure with adjustable hardness, the spring structure with the adjustable hardness includes a spring, an adjustment member, and a wrapping member, the wrapping member is used for wrapping the spring, the adjustment member is used for adjusting a pre-compression force of the spring, the adjustment member is disposed on one end of the spring to squeeze the one end of the spring, the adjustment member includes a rotating member, a moving member, and a support member, the moving member is movably mounted on the support member, the rotating member is connected to the support member by a linkage, the rotating member rotates to drive the support member to rotate, and the moving member moves up and down along the support member to squeeze the spring by rotating the support member.

A coil spring comprises a continuous wire forming a lowermost convolution, an uppermost convolution, and a plurality of helical intermediate convolutions. The coil spring is divided into an upper portion and a lower portion. The intermediate convolutions of the lower portion have a diameter greater than or equal to a lower minimum diameter, and the pitch between each of the convolutions of the lower portion is greater than or equal to a lower minimum pitch. The intermediate convolutions of the upper portion have a diameter greater than or equal to an upper minimum diameter, and the pitch between each of the convolutions of the upper portion is less than or equal to an upper maximum pitch. The upper minimum diameter is greater than, less than, or equal to the lower minimum diameter, and the upper maximum pitch is less than the lower minimum pitch to provide a non-linear and variable response.