A non-contact power supply circuit supplying power to an appliance, the non-contact power supply circuit comprising: a primary circuit adapted to be arranged on a first part of the appliance, and a secondary circuit adapted to be arranged on a second part of the appliance which is translationally movable relative to the first part, the primary circuit being configured to transfer energy to the secondary circuit via electromagnetic coupling, wherein the primary circuit has at least one transmitting coil (120; 310a-310c; 410a-410c) and the secondary circuit has at least one receiving coil (130; 320; 320a-320c; 420; 420-420b), and a normal direction of the at least one transmitting coil and a normal direction of the at least one receiving coil are the same or have a first angle, characterized in that the quantity of coils formed by the at least one transmitting coil (120; 310a-310c; 410a-410c) and the at least one receiving coil (130; 320; 320a-320c; 420; 420-420b) is greater than two, wherein the at least one transmitting coil (120; 310a-310c; 410a-410c) and the at least one receiving coil (130; 320; 320a-320c; 420; 420-420b) are adapted to be respectively arranged on the first and second parts of the appliance and disposed relative to each other along respective directions parallel to a direction of the translational movement between the first and second parts so that, when the first and the second parts translationally move with respect to each other, one or more of the at least one receiving coil (130; 320; 320a-320c; 420; 420-420b) is positioned relative to the at least one transmitting coil (120; 310a-310c; 410a-410c) to receive energy via electromagnetic coupling from one or more of the at least one transmitting coil (120; 310a-310c; 410a-410c), thereby maintaining a stable power supply during a translational movement between the first and the second parts. a primary circuit adapted to be arranged on a first part of the appliance, and a secondary circuit adapted to be arranged on a second part of the appliance which is translationally movable relative to the first part, the primary circuit being configured to transfer energy to the secondary circuit via electromagnetic coupling, wherein the primary circuit has at least one transmitting coil (120; 310a-310c; 410a-410c) and the secondary circuit has at least one receiving coil (130; 320; 320a-320c; 420; 420-420b), and a normal direction of the at least one transmitting coil and a normal direction of the at least one receiving coil are the same or have a first angle, characterized in that the quantity of coils formed by the at least one transmitting coil (120; 310a-310c; 410a-410c) and the at least one receiving coil (130; 320; 320a-320c; 420; 420-420b) is greater than two, wherein the at least one transmitting coil (120; 310a-310c; 410a-410c) and the at least one receiving coil (130; 320; 320a-320c; 420; 420-420b) are adapted to be respectively arranged on the first and second parts of the appliance and disposed relative to each other along respective directions parallel to a direction of the translational movement between the first and second parts so that, when the first and the second parts translationally move with respect to each other, one or more of the at least one receiving coil (130; 320; 320a-320c; 420; 420-420b) is positioned relative to the at least one transmitting coil (120; 310a-310c; 410a-410c) to receive energy via electromagnetic coupling from one or more of the at least one transmitting coil (120; 310a-310c; 410a-410c), thereby maintaining a stable power supply during a translational movement between the first and the second parts.