Inertial Escapement Locking Device Based on MEMS

Addressing the performance limitation of traditional mechanical locking devices under low-acceleration overloads, this study proposes an inertial escapement locking device based on Micro-Electro-Mechanical Systems (MEMS) technology. The device integrates core components such as an electrothermal actuator, eccentric wheel, gears, and pallets. Through the synergistic action of the electrothermal actuator and the escapement mechanism, it achieves high-precision time control and reliable safety protection. Theoretical analysis, dynamic simulation, and multiphysics coupling simulation have confirmed that under a 20 V DC voltage excitation, the electrothermal actuator exhibits a deformation of 1.3 mm. Moreover, under a 20 g acceleration overload environment, the escapement mechanism demonstrates a delay characteristic of 1.2 s, while the locking device possesses a high-precision acceleration recognition capability.