Jewelry micromotors typically refer to miniature motors used in wearable jewelry devices, such as smart rings and moving jewelry. Their core characteristics are ultra-small size, low noise, precise control, and low power consumption.
These motors are not traditional drive motors, but rather designed to provide haptic feedback, micro-motion execution, or dynamic decorative functions. Depending on the application, they are mainly divided into two categories:
Miniature Linear Vibration Motors (LRAs)
Used for notifications and interactive feedback in smart jewelry. For example:
Size can be as small as Φ4×1.5mm, suitable for embedding in extremely small spaces such as rings.
Resonant frequency is approximately 240Hz, providing high-frequency, short vibrations to simulate a "click" sensation.
Start-up time ≤ 40ms, rapid vibration stopping, supporting complex rhythm encoding such as double-clicks and pulses.
Operating voltage as low as 0.6Vrms AC, suitable for micro-battery-powered devices.
Mechanical noise ≤ 45dB(A), ensuring privacy and quiet during wear.
Miniature movable structure drive motors (such as piezoelectric or magnetically driven microrobots) are used in cutting-edge designs such as "moving jewelry," for example, the microrobot jewelry developed by MIT that can climb on clothing. Essentially, these are programmable, mobile microrobot units with the following capabilities:
Magnetically controlled movement, enabling autonomous movement or reconfiguration on fabric surfaces.
Automatic adjustment of wearing status in response to environmental changes (such as temperature) (e.g., putting on a hood).
Support for personalized customization, such as dynamically displayed patterns and shape transformations.
