Fin structure

A fin structure for heat-exchanging, said fin structure being mounted on a portion of a Stirling cycle cooler, wherein said fin structure is configured by coupling a plurality of unit structures, said plurality of unit structures being split by a plurality of surfaces extending from an inner circumference of said fin structure toward an outer circumference thereof,

• wherein each unit structure is formed with an opposed portion,
• wherein said unit structures are mounted on a Stirling cycle cooler by coupling members, each coupling member being inserted in two of said unit structures adjoining with each other so as to pinch said opposed portions,
• wherein each unit structure comprises:
• an inner rim formed in a shape matching a contour of the outer circumference of the Stirling cycle cooler, said inner rim contacting the outer circumference thereof;
• an outer rim provided outwardly relative to said inner rim;
• an intermediate rim provided between said inner rim and said outer rim, said intermediate rim being connected with said inner rim via said opposed portions;
• a plurality of fins provided between said inner rim and said intermediate rim;
• and
• a plurality of fins provided between said intermediate rim and said outer rim.