This bistable switch is an example of a compliant mechanism with a four-bar mechanism pseudo-rigid-body model. A contact force is created by causing the contacts to connect before the second stable equilibrium position is reached. Living hinges are used at the other joints. This mechanism could be used as a fully compliant electrical switch, or for other applications, such as on cabinet door hinges.
This can be 3D printed or milled. For ideal use, milling or cutting with polypropylene results in the best performance.
If 3D printing, depending on the filament material you use and its fatigue/flex properties, this will determine the number of cycles it can handle. See print settings
The BYU Compliant Mechanisms Research Group (CMR) involves students and faculty who strive to make an impact by creating compliant mechanism theories and applications that are novel, used by others, and make a difference for good.
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