Head suspension assembly, rotation detecting mechanism, and conveying mechanism

A rotation detecting mechanism for detecting rotation of a rotator which is rotatably supported by a bearing bracket, comprising:

• a magnetic recording medium which is constructed so as to rotate coaxially and integrally with the rotator and has a magnetic recording surface orthogonal to a rotation axis of the rotator;
• and
• a head suspension assembly for detecting a rotation amount of the magnetic recording medium by using magnetic informations recorded on the magnetic recording surface,
• wherein the head suspension assembly comprises:
• a suspension having a pair of attachment parts fixed to the bearing bracket, and an arm which extends in a U shape or V shape so as to connect the pair of attachment parts to each other and shows elasticity in a direction orthogonal to a plane including the pair of attachment parts;
• and
• a magnetic sensor provided on the arm and energized so as to be in contact with the magnetic recording surface of the magnetic recording medium by using the elasticity of the arm.

A conveying mechanism comprising:

• a first rotator rotatably supported by a bearing bracket, and conveying an object to be conveyed in a rotation direction by rotating around a first rotation axis;
• a magnetic recording medium which is constructed so as to rotate coaxially and integrally with the first rotator and has a magnetic recording surface orthogonal to the first rotation axis;
• and
• a head suspension assembly for detecting a rotation amount of the magnetic recording medium by using magnetic information recorded on the magnetic recording surface,
• wherein the head suspension assembly comprises:
• a suspension having a pair of attachment parts fixed to the bearing bracket and an arm which extends in a U shape or V shape so as to connect the pair of attachment parts each other while surrounding at least a part of the periphery of the first rotator and shows elasticity in a direction orthogonal to a plane including the pair of attachment parts;
• and
• a magnetic sensor provided on the arm and energized so as to be in contact with the magnetic recording surface of the magnetic recording medium by using elasticity of the arm.