Energy storage mechanism on skylight sunshade

The utility model discloses an energy storage mechanism on a skylight sunshade. The energy storage mechanism on the skylight sunshade comprises a spring (3), an iron core assembly, an aluminum pipe (4) and a fixing block (2) fixing one end of the spring (3) and one end of the aluminum pipe (4); the iron core assembly comprises an iron core (1) and an expansion ring (13), one end of the iron core (1) is provided with a flat head (11), a pair of lug portions (12) are arranged in the middle of the iron core (1), the expansion ring (13) is located between the lug portions (12) and the flat head (11) and arranged on the iron core (1) in a sleeving mode, one end of the iron core (1) penetrates through a central through hole of the fixing block (2), the expansion ring (13) is assembled in a step hole in the fixing block (2) in an interference fit mode, and the other end of the spring (3) is fixed to the iron core (1). The energy storage mechanism on the skylight sunshade is characterized in that the expansion ring (13) is of a split type and of an annular structure assembled through two parts. The expansion ring is not assembled firstly when surface treatment is carried out on the iron core, then the subsequent surface treatment will not be limited by the expansion ring, and machining is convenient.