| 摘要 |
It is an object of the present invention, in an electromagnetic reciprocating fluid device in which a movable member is equipped with permanent magnets, to resist a torque rotating the movable member about an axis thereof in the reciprocating direction. The electromagnetic reciprocating fluid device has a pair of electromagnets 28, 28' facing each other, and permanent magnets 26, 26' disposed in a space between the opposed electromagnets and held by a movable member 27. When an alternating current is applied to coils 34 formed in the electromagnets, a magnetic force is generated between the electromagnets and the permanent magnets, whereby a driving force for reciprocation is applied to the movable member. One end of the movable member is connected to a piston 18 of a first piston-cylinder assembly 12, while the other end is connected to a piston 18' of a second piston-cylinder assembly 12'. The first and second piston-cylinder assemblies are arranged such that an axis line 58 of the first piston-cylinder assembly and an axis line 59 of the second piston-cylinder assembly are non-coaxial and vertically offset from an axis 60 of the movable member.
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