Shock absorber

A shock absorber having a tube divided into a compression chamber and a rebound chamber by a piston valve movable in first and second directions, the shock absorber comprising:

• an elastic module disposed in the compression chamber, the elastic module comprising first and second elastics, a central guide disposed the first elastic and the second elastic and configured to be movable in the first and second directions, and a lower guide disposed to support an end of the second elastic disposed between the central guide and the lower guide;
• a first disc module disposed in the compression chamber, the first disc module comprising one or more first lower discs, an upper retainer having one or more first flow paths formed in the upper retainer and disposed between the central guide of the elastic module and one or more first upper discs, and the one or more first upper discs disposed between the upper retainer and the one or more first lower discs, each of the one or more first upper discs having one or more flow paths formed in an outer peripheral surface of each of the one or more first upper discs;
• and
• a second disc module disposed in the compression chamber, the second disc module comprising one or more second lower discs, and one or more second upper discs disposed between the first lower discs and the one or more second lower discs, each of the one or more second upper discs having one or more flow paths formed in an outer peripheral surface of each of the one or more second upper discs,
• wherein the first upper discs and the first lower discs are configured to be deformable to be curved in the second direction opposite to the first direction to form a first bypass flow path in response to hydraulic pressure equal to or higher than a preset first hydraulic pressure, and
• wherein the second upper discs and the second lower discs are configured to be deformable to be curved downward in the second direction to form a second bypass flow path in response to hydraulic pressure equal to or higher than a preset second hydraulic pressure.