| 摘要 |
PURPOSE: A structure of a relay controlled by an air pressure is provided to supply electric power to an electric circuit without additional electric power by using an air cylinder. CONSTITUTION: An operating shaft(3) of an air cylinder(2) is connected with a compressor(1). A movable contact(4) is formed at an end portion of the operating shaft(3). The movable contact(4) corresponds to a fixing contact(5) of an electric circuit(6). In a normal state, the movable contact(4) is separated from the fixing contact(5) of the electric circuit(6). The movable contact(4) is connected with the fixing contact(5) of the electric circuit(6) and electric power(10) is provided to the electric circuit(6) when the operating shaft(3) of the air cylinder(2) is extended by an air pressure control valve(9).
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