Hitachi Astemo Ltd.

Reiji Nakagawa

Mikio Yamashita

This shock absorber includes: a friction member including an annular elastic rubber portion and an annular base portion (to which the elastic rubber portion is fixed; and a communication path that decreases a pressure difference between both sides of the friction member. The base portion includes an annular disk portion. The elastic rubber portion includes a minimum inner diameter portion on an inner peripheral side and includes an inner peripheral connection portion connected to an inner peripheral portion of the annular disk portion. A protrusion suppression structure portion that suppresses protruding of an inner peripheral surface formed from the minimum inner diameter portion toward the inner peripheral connection portion is provided at least partially in a circumferential direction between the inner peripheral connection portion and the minimum inner diameter portion of the elastic rubber portion.

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Zama, Japan

Reiji Nakagawa