A smart ring, comprising a ring body. A circuit board
assembly (3) and a storage battery (4) are packaged in the ring body; a control
chip (32) and an NFC
chip (33) are packaged on the circuit board
assembly (3); the ring body comprises a ring frame (1); a coil (2) is arranged on a circumferential wall surface of the ring frame (1), and the coil (2) surrounds the circumferential wall surface of the ring frame (1); and the coil (2) is electrically connected to the circuit board
assembly (3). According to the present application, a receiving coil is arranged in the circumferential direction of the ring frame, and a traditional NFC
signal communication antenna is replaced with the coil, so that the NFC electromagnetic charging receiving coil and the NFC
signal communication antenna are integrated into a single antenna, thereby facilitating structural optimization; in addition, the coil is circumferentially arranged around the ring frame, so that the detection range is expanded to the greatest extent. Compared with a traditional approach of arranging an NFC
signal communication antenna in a local area, the signal reception range and sensitivity can be effectively increased, thereby enabling a more responsive and stable
wireless connection.