Throttle mechanism for centrifugal compressor and turbocharger

A centrifugal compressor comprising:

• a compressor housing in which an intake passage is formed;
• a compressor impeller provided in the intake passage;
• an actuator that causes a rod to linearly move in a direction orthogonal with a rotation axis direction of the compressor impeller;
• a connection member connected to the rod, the connection member presenting an arcuate shape;
• a throttle member including a protruding portion;
• a connection shaft extending in the rotation axis direction and connecting the connection member and the throttle member;
• and
• a rotation shaft extending in a direction parallel to the connection shaft and serving as a rotation center of the throttle member,
• wherein the throttle member comprises a first throttle member and a second throttle member,
• wherein the connection shaft and the rotation shaft are provided to each of the first throttle member and the second throttle member, and
• wherein both ends of the protruding portions of both the first throttle member and the second throttle member are in contact with each other and form an annular hole having an inner diameter smaller than that of the intake passage.