Damper

A damper, comprising:

• a cylinder in which a working fluid is sealed;
• a piston slidably fitted into the cylinder and configured to partition an inside of the cylinder into a first cylinder chamber and a second cylinder chamber;
• a piston rod in which one end side is connected to the piston and an other end side extends to an outside of the cylinder;
• a first passage in which the working fluid flows out from one of the cylinder chambers due to movement of the piston;
• a second passage provided in parallel to the first passage;
• a first damping force generation mechanism provided in the first passage to generate a damping force;
• an annular case member having a bottomed cylindrical shape which penetrates a shaft-shaped member and has at least a portion of the second passage formed inside;
• an annular disc which penetrates the shaft-shaped member and is disposed to face a bottom part of the case member in the case member to be able to be bent by the working fluid in the case member;
• a first chamber communicating with the first cylinder chamber and a second chamber communicating with the second cylinder chamber which are provided by the disc partitioning the inside of the case member;
• a first through hole provided in the bottom part of the case member and configured to communicate with the second chamber;
• a bypass passage provided in parallel to the first through hole and configured to allow communication between the first chamber and the second cylinder chamber;
• and
• a second damping force generation mechanism provided in the bypass passage and configured to open a valve thereof when a pressure inside the first chamber reaches a predetermined pressure to generate a damping force.