fig18

Figure 18. (A) Bio-inspired magnetically driven folded diaphragm inspired by an earthworm; (B) Manufacturing mold; (C) Magnetization mold for the magnetically driven folded diaphragm; (D) Magnetization characteristics and working principle of the magnetically driven upward-magnetized folded diaphragm (Type+diaphragm); (E) Magnetization characteristics and working principle of the magnetically driven downward-magnetized folded diaphragm (Type+diaphragm). Reproduced under the Creative Commons Attribution (CC BY 4.0) license^[50].