Abstract: According to a solenoid air valve, a flange portion of a moving core and a flange portion area of a bobbin implement a stop area defining a distance of travel of the moving core in a direction away from a fixed core. An end portion of a shaft portion of the moving core can project outward through an opening of a frame cover, so that a gap between a surface of the frame cover facing the shaft portion and a side surface of the shaft portion (distance: L2) can be minimized. Consequently, a solenoid air valve having a structure allowing improvement in magnetic efficiency by making smaller the gap between the frame and the moving core is provided.

Abstract: A moving core of a solenoid air valve has a flange portion arranged on a side of a fixed core, provided in a radially projecting manner and having a first diameter, and a shaft portion having a second diameter smaller than the first diameter. Therefore, a sufficient area of magnetic pole is ensured around a rubber packing in the flange portion of the moving core. Consequently, the solenoid air valve structured such that an area of magnetic pole is sufficiently ensured even if the moving core is made thinner in order to ensure a volume of a coil body in reducing the solenoid air valve in size can be provided.

Abstract: A moving core of a solenoid air valve has a flange portion arranged on a side of a fixed core, provided in a radially projecting manner and having a first diameter, and a shaft portion having a second diameter smaller than the first diameter. Therefore, a sufficient area of magnetic pole is ensured around a rubber packing in the flange portion of the moving core. Consequently, the solenoid air valve structured such that an area of magnetic pole is sufficiently ensured even if the moving core is made thinner in order to ensure a volume of a coil body in reducing the solenoid air valve in size can be provided.

Abstract: According to a solenoid air valve, a flange portion of a moving core and a flange portion area of a bobbin implement a stop area defining a distance of travel of the moving core in a direction away from a fixed core. An end portion of a shaft portion of the moving core can project outward through an opening of a frame cover, so that a gap between a surface of the frame cover facing the shaft portion and a side surface of the shaft portion (distance: L2) can be minimized. Consequently, a solenoid air valve having a structure allowing improvement in magnetic efficiency by making smaller the gap between the frame and the moving core is provided.

Abstract: A flow control valve utilizing at least one permanent magnet and at least one magnetic coil, wherein one or more permanent magnets or magnetic coils are used to move a movable member in towards and/or away from an inflow port so as to control the flow through the port. When multiple permanent magnets are used, at least one yoke, which protrudes beyond the edges of the magnets, is place between each pair of magnets. A fixed shaft that passes through a hollow portion of the movable member is used to control the movement of the movable member, and an air vent is present near the end of the movable member that is closest to the inflow port such that the hollow space of the movable member does not form a vacuum.

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