Patent ID: 7896321

Claim:
A spring force adjusting device for a hydraulic shock absorber, comprising: a cylinder; a rod protruding from the cylinder so that the rod is free to extend and retract; a tube-shaped cover provided on an outside of the rod and having an inner diameter larger than an outer diameter of the cylinder; a suspension spring arranged on outer peripheries of the cylinder and the cover; a cam mechanism arranged on the outer periphery of the cover to adjust a spring force, the cam mechanism supporting one end of the suspension spring, being rotatable with respect to the cover, being engaged with the cover in an axial direction, and moving the one end of the suspension spring vertically according to a rotating position of the cam mechanism; a top cap mounted on a tip of the rod and having a diameter smaller than a diameter of the cover; and a junction member sandwiched between the top cap and the cover and arranged so that the junction member can be attached and detached in a direction orthogonal to the rod, an inner peripheral side of the junction member having a first notch portion, an outer peripheral side of the junction member having a second notch portion, such that the top cap engages with the first notch portion and the cover engages with the second notch portion, so as to prevent relative rotations of the top cap, the cover, and the junction member.