【図面の簡単な説明】[Brief explanation of drawings] 第１図ａは本考案の一実施例の回路図、第１図
ｂは同上のエアーマツトの概略平面図、第１図ｃ
は同上の概略断面図、第２図、第３図、第４図及
び第５図は同上の制御形態を示す説明図、第６図
は同上の他の実施例の回路図、第７図は従来例の
回路図であり、１はエアー噴出孔、２は噴出空気
室、３は膨縮空気室、４は交互供給手段、５はエ
アーポンプである。 Fig. 1a is a circuit diagram of an embodiment of the present invention, Fig. 1b is a schematic plan view of the same air mat, Fig. 1c
is a schematic sectional view of the same as above, FIGS. 2, 3, 4 and 5 are explanatory diagrams showing the control form of the above, FIG. 6 is a circuit diagram of another embodiment of the above, and FIG. This is a circuit diagram of a conventional example, in which 1 is an air jet hole, 2 is a jet air chamber, 3 is an expansion/deflation air chamber, 4 is an alternate supply means, and 5 is an air pump.