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This bistable compliant mechanism was developed by the BYU Compliant Mechanisms Research group (compliantmechanisms.byu.edu). This model shows the bistable behavior that can be achieved by using a single print compliant mechanism.
The model can either be 3D printed or milled.
Mechanism milled out of steel
Bistable Micromechanical Devices
By Messenger, R.K., McLain, T.W., Anderson, J.K., Howell, L.L.
U.S. Patent No. 7,554,342