Patent ID: 7243498

Claim:
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.