Novel cooling fin device

The utility model discloses a novel radiating fin device which comprises a radiating bottom plate, a plurality of sliding rods are installed in the radiating bottom plate in a sliding mode, every ten sliding rods form a group, a first connecting rod and a second connecting rod which are crossed are installed on the sliding rods at the two ends of the same group in a rotating mode, and the first connecting rod and the second connecting rod on the sliding rods at the two ends of the same group are connected in a crossed rotating mode. A plurality of rhombic sliding blocks are rotationally installed on the first connecting rods and the second connecting rods in the same set, the rhombic sliding blocks are installed in the corresponding sliding rods in a sliding mode, cooling fins are installed on each sliding rod, and a telescopic mechanism is formed through arrangement of the sliding rods, the first connecting rods, the second connecting rods and the rhombic sliding blocks. The distance between the heat dissipa