A rotating mechanism, comprising a base assembly (10; 40), a rotator assembly (11; 41), and a riveting gasket (12; 42), characterized in that: the base assembly (10; 40) is riveted to the riveting gasket (12; 42); the rotator assembly (11; 41) is sheathed to the base assembly (10; 40), the riveting gasket (12; 42) restricts the rotator assembly (11; 41) onto the base assembly (10; 40), and the rotator assembly (11; 41) is rotatable against the base assembly (10; 40) around an axial direction; and the rotator assembly (11; 41) includes at least one elastomer (17; 47), a concave-convex structure on the base assembly (10; 40) engages with a concave-convex structure on the elastomer (17; 47) to fix the rotator assembly (11; 41) and the base assembly (10; 40), wherein: the base assembly (10; 40) comprises a base (13; 43) and a sleeve (14; 44); and the sleeve (14; 44) is riveted or integrated onto the base (13; 43), the sleeve (14; 44) and the base (13; 43) are hollow, the hollow part of the sleeve (14; 44) is connected to the hollow part of the base (13; 43), and the rotator assembly (11; 41) is sheathed to the sleeve (14; 44), wherein: the rotator assembly further comprises a support and a rotator; and the support and the rotator are sheathed to the sleeve, the at least one elastomer is set on the support, and a concave-convex structure on the sleeve engages with a concave-convex structure on the elastomer, wherein: the rotator assembly further comprises a roller; and the roller reaches and contacts the support or the rotator, the roller also reaches and contacts the base, and the roller props up between the support and the base, or between the rotator and the base. the base assembly (10; 40) is riveted to the riveting gasket (12; 42); the rotator assembly (11; 41) is sheathed to the base assembly (10; 40), the riveting gasket (12; 42) restricts the rotator assembly (11; 41) onto the base assembly (10; 40), and the rotator assembly (11; 41) is rotatable against the base assembly (10; 40) around an axial direction; and the rotator assembly (11; 41) includes at least one elastomer (17; 47), a concave-convex structure on the base assembly (10; 40) engages with a concave-convex structure on the elastomer (17; 47) to fix the rotator assembly (11; 41) and the base assembly (10; 40), wherein: the base assembly (10; 40) comprises a base (13; 43) and a sleeve (14; 44); and the sleeve (14; 44) is riveted or integrated onto the base (13; 43), the sleeve (14; 44) and the base (13; 43) are hollow, the hollow part of the sleeve (14; 44) is connected to the hollow part of the base (13; 43), and the rotator assembly (11; 41) is sheathed to the sleeve (14; 44), wherein: the rotator assembly further comprises a support and a rotator; and the support and the rotator are sheathed to the sleeve, the at least one elastomer is set on the support, and a concave-convex structure on the sleeve engages with a concave-convex structure on the elastomer, wherein: the rotator assembly further comprises a roller; and the roller reaches and contacts the support or the rotator, the roller also reaches and contacts the base, and the roller props up between the support and the base, or between the rotator and the base.