Abstract: The disclosure relates to a ring structure with an adjustable size, which includes an outer ring, an inner ring, and a concave-convex structure. The outer ring has an inner wall. The inner ring is removably fitted inside the outer ring and has an outer wall abutting against the inner wall. The concave-convex structure includes a protrusion connected on either one of the inner wall of the outer ring and the outer wall of the inner ring and a slot disposed on another one of the inner wall of the outer ring and the outer wall of the inner ring. The protrusion is mortised in the slot. Therefore, the inner ring is removably fitted inside the outer ring to generate a ring with various sizes for different users. The ring structure of this disclosure may have the advantages of providing various sizes and saving costs.

Abstract: A wireless controlling system including a smart ring and an identification program installed in a mobile device is disclosed. The ring includes an MCU, a six-axis accelerometer, a transmitting unit and a storage. The storage stores multiple gesture models respectively corresponding to different moving trajectories. When a user moves with the ring, the six-axis accelerometer continuously detects a set of moving signals of the ring. The MCU continuously determines whether the set of moving signals matches any moving trajectory of the gesture models. When a gesture model is matched, the MCU sends a gesture command corresponding to the matched gesture model to the mobile device through the transmitting unit. The mobile device analyzes the gesture command to obtain a corresponding operation command through the identification program, and the mobile device is being controlled to execute a corresponding function in accordance with the operation command.