| 摘要 |
<p>Disclosed is a cryogenic refrigerator having a cylinder to which refrigerant gas is supplied, a displacer which reciprocates within the cylinder, a drive device which reciprocates the displacer within the cylinder, and a coupling mechanism for coupling the drive device to the displacer. The coupling mechanism has an output shaft extending from the drive device toward the displacer, an engagement pin which penetrates the output shaft so as to extend in a direction intersecting with the reciprocating direction of the displacer, a rotation prevention mechanism which engages with the engagement pin when the displacer rotates, to prevent the displacer from rotating, and a closure which is secured to one end of the displacer and engaged with the output shaft.</p> |
