A power feeding mechanism for feeding output power of a power source into a rotating component, comprising: a conductive stationary member, which is electrically connectable with the power source; a conductive rotating member which is electrically connectable with the rotating component and is arranged to synchronously rotate with the rotating component; and a conductive connecting structure, which is in electrical contact with the conductive stationary member and the conductive rotating member, respectively, without affecting rotation of the conductive rotating member, wherein the conductive rotating member is disposed opposite to and spaced apart from the conductive stationary member; and the conductive connecting structure is disposed in a gap between the conductive rotating member and the conductive stationary member; and the conductive connecting structure comprises: a second elastic conductive member, a third elastic conductive member and a spring, wherein, two ends of the spring are connected to the conductive stationary member and the second elastic conductive member thereabove, respectively; the third elastic conductive member is provided on the second elastic conductive member and is kept in electrical contact with the conductive rotating member under action of elastic force of the spring; and a hardness of the second elastic conductive member is lower than that of the third elastic conductive member; or the conductive connecting structure comprises: a second elastic conductive member, which is connected with the conductive stationary member and is a ring body disposed around the conductive rotating member; a third elastic conductive member, which is connected with the conductive rotating member, is located between an inner wall surface of the ring body and an outer wall surface of the conductive rotating member, and is in electrical contact with the ring body and the conductive rotating member respectively; and wherein a hardness of the second elastic conductive member is lower than that of the third elastic conductive member. a conductive stationary member, which is electrically connectable with the power source; a conductive rotating member which is electrically connectable with the rotating component and is arranged to synchronously rotate with the rotating component; and a conductive connecting structure, which is in electrical contact with the conductive stationary member and the conductive rotating member, respectively, without affecting rotation of the conductive rotating member, wherein the conductive rotating member is disposed opposite to and spaced apart from the conductive stationary member; and the conductive connecting structure is disposed in a gap between the conductive rotating member and the conductive stationary member; and the conductive connecting structure comprises: a second elastic conductive member, a third elastic conductive member and a spring, wherein, two ends of the spring are connected to the conductive stationary member and the second elastic conductive member thereabove, respectively; the third elastic conductive member is provided on the second elastic conductive member and is kept in electrical contact with the conductive rotating member under action of elastic force of the spring; and a hardness of the second elastic conductive member is lower than that of the third elastic conductive member; or a second elastic conductive member, a third elastic conductive member and a spring, wherein, two ends of the spring are connected to the conductive stationary member and the second elastic conductive member thereabove, respectively; the third elastic conductive member is provided on the second elastic conductive member and is kept in electrical contact with the conductive rotating member under action of elastic force of the spring; and a hardness of the second elastic conductive member is lower than that of the third elastic conductive member; or the conductive connecting structure comprises: a second elastic conductive member, which is connected with the conductive stationary member and is a ring body disposed around the conductive rotating member; a third elastic conductive member, which is connected with the conductive rotating member, is located between an inner wall surface of the ring body and an outer wall surface of the conductive rotating member, and is in electrical contact with the ring body and the conductive rotating member respectively; and wherein a hardness of the second elastic conductive member is lower than that of the third elastic conductive member. a second elastic conductive member, which is connected with the conductive stationary member and is a ring body disposed around the conductive rotating member; a third elastic conductive member, which is connected with the conductive rotating member, is located between an inner wall surface of the ring body and an outer wall surface of the conductive rotating member, and is in electrical contact with the ring body and the conductive rotating member respectively; and wherein a hardness of the second elastic conductive member is lower than that of the third elastic conductive member.