To provide an inexpensive actuator device for forced air feed capable of effectively feeding the air without generating vibration or noise.
This device is provided with two diaphragms 8 and 9 facing to each other, voice coils 6 and 7 mounted on the surfaces of the respective diaphragms 8 and 9, a magnet 2 integrated with pole pieces 3 and 4, a yoke 5 facing to the pole pieces 3 and 4, and a housing 1 for keeping the facing space of the diaphragms 8 and 9 airtight. An air inlet port 16 and an air-jetting port 17 communicating with the facing space of the diaphragms 8 and 9 are formed, a closing valve 18 is installed inside, by adapting it to the introducing port 16 and a closing valve 19 is installed outside by adapting it to the jetting port 17, so that the device is composed as an air pump, by the use of the two diaphragms 8 and 9 vibrating repetitively and continuously.
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