基于平行四边形环链的旋转开合板式结构
俞锋(),许贤,罗尧治*()
Rotary retractable plate structures with parallelogram closed-loop chains
Feng YU(),Xian XU,Yao-zhi LUO*()

图 4. 旋转开合板式结构(RRPS)示意图

Fig.4. Schematic diagram of rotary retractable plate structures (RRPS)