An acceleration latching switch with flexible contacts and barb latching mechanism

A micro-acceleration latching switch with barb latching mechanism is presented in this paper. The latching mechanism which likes a “barb” can make the switch latch reliably. What's more, the flexible contacts can prevent the switch from opening due to impact resulting from the rebound or vibration of proof mass when the switch is latched. The stops which limit displacement will also improve the reliability of the switch. The switch was fabricated by low-cost process and tested. The measured latching shock is 1700 g and the response time is less than 0.3 ms. The isolation resistance is more than 200 M ohms and the on-state resistance is no more than 15 ohms.