The plane four-bar linkage, the plate cam and follow, and the slider-crank mechanism are familiar examples of planar mechanism. The vast majority of mechanism in use today are planar.

• 平面四杆联动机构、平面盘形凸轮及从动件、以及曲柄滑块机构等都是平面机构的常见例子。目前机械原理应用的绝大部分都是平面机构。