Linear actuator
AssigneeNippon Pulse Motor Co., Ltd.
InventorShuji Sato
Life of this patent
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Abstract
The present invention is directed to provide a linear actuator capable of propagating magnetic force of a stator magnet within a yoke in a smooth manner so as to form a superior magnetic path. A linear actuator is provided with a moveable part facing a stator magnet provided together with a coil within a yoke, with both magnetic pole pieces of the yoke being exited to an S pole and an N pole respectively by switching of energizing of the coil so as to subject the moveable part to thrust and bring about reciprocal driving. According to the present invention, the coil is divided into split coils so as to retain excitation function, and a magnetic path body for connecting the stator magnet and the yoke is provided between the split coils. Magnetic force of the stator magnet is transmitted to the yoke via the magnetic path body.
Claims16
A linear actuator provided with a moveable part facing a stator magnet provided together with a coil within a yoke, with both magnetic pole pieces of the yoke being exited to an S pole and an N pole respectively by switching of energizing of the coil so as to subject the moveable part to thrust and bring about reciprocal driving,
- wherein:
- said coil is divided into split coils so as to retain excitation function, and a magnetic path body for connecting the stator magnet and the yoke is provided between the split coils, such that magnetic force of the stator magnet is transmitted to the yoke via the magnetic path body.
A linear actuator comprising:
- a stator magnet;
- a moveable part facing the stator magnet, and said moveable part reciprocally moveable along an axis of movement;
- split coils aligned along the axis of movement;
- a yoke housing said stator magnet, said moveable part and the coils, and said yoke defining magnetic pole pieces;
- and
- a magnetic path body provided between said splits coils, said magnetic path body connecting the stator magnet and the yoke such that magnetic force of the stator magnet is transmitted to the yoke via the magnetic path body.
Dependencies are inferred from the claim text.