A contactless-smart-IC-card receive and read-write mechanism for an on-street parking meter. The mechanism includes a nested cartridge set consisting of a card read-write unit and a card receiver. The card read-write unit further includes an outer case having an induction coil and a circuit board attached to one outer side of the outer case. The card receiver is removably nested in the outer case for an IC card to insert thereinto. The circuit board has different circuits provided thereon for controlling power supply to correctly complete card reading and overwriting. A detecting switch is mounted on the outer case to detect the existence of the IC card in the card receiver. Only when a correct IC card in the receiver is detected will a high frequency power supply circuit be actuated for the card read-write unit to read and overwrite data or amount stored in the IC card. The card read-write unit is not affected by external dust or rainwater to cause error operation. Any clogged or damaged card receiver may be easily removed from the read-write unit for maintenance or replacement.
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