Sensor support structure for camshaft rotation sensor

A sensor support structure comprising:

• a connection portion being positioned in a cylinder head cover of an internal combustion engine from an outer surface of the cylinder head cover to a position where the connection portion comes in contact with a cylinder head of the internal combustion engine;
• an arm portion extending from an outer end side of the connection portion toward an outer side of the connection portion in a radial direction;
• a sensor support portion being provided at an extending end of the arm portion, the sensor support portion being formed to protrude in a direction away from a side where the cylinder head is positioned, the sensor support portion supporting a sensor that detects a rotation of a camshaft of the internal combustion engine;
• and
• a restriction portion restricting a movement of the arm portion relative to the cylinder head cover in a circumferential direction about the connection portion,
• wherein the connection portion is inserted into a connection portion insertion through hole provided in the cylinder head cover,
• a portion of the sensor is inserted into a sensor insertion through hole provided in the cylinder head cover, and
• the restriction portion includes
• a protrusion being formed at one of the extending end of the arm portion and the cylinder head cover;
• and
• a recess being provided at the other of the extending end of the arm portion and the cylinder head cover, the recess being provided at a position facing the protrusion, the recess being formed in a long-hole shape along an extending direction of the arm portion.