A　3R1H　Pseudo-Rigid-Body　Model　(PRBM)　is　proposed　to　simulate　the　flexible　beam　with　an　inflection　point　in　compliant　mechanisms.　The　characteristic　radius　factors　of　the　PRBM　are　determined　via　optimization.　The　spring　stiffness　coefficients　are　obtained　using　a　linear　regression　technique.　The　numerical　simulation　shows　that　both　the　tip　locus　and　inflection　point　of　the　flexural　beam　with　single　inflection　point　can　be　simulated　using　the　model　proposed　in　this　paper.　©　Springer　International　Publishing　AG　2018.