Flow control valve and sphygmomanometer

摘要: A flow control valve, comprising a frame case (2) having gas inlet (1a) and outlet (1b), an operating shaft (4) disposed so as to be allowed move close away from the (1a), orifice packing (3) installed at tip of opening closing wherein two permanent magnets (5a, 5b) are on through yoke (22a) in state where same electrodes thereof opposed each other three electromagnetic coils (6a, 6b, 6c) outside winding directions positioned adjacent reverse and, when current flows 6c), forces generated by combined with other, is moved leftward combination thrust shown figure that closes whereby valve small size less power consumption mal-function can provided effectively utilizing force while structure simple.