ELECTROMAGNETIC ACTUATOR
First Claim
1. An electromagnetic actuator comprising a plurality of sets, each of the sets including:
- a plunger made of a magnetic material;
a spring biasing the plunger in one direction;
a core made of a magnetic material; and
a coil generating, in the core, a magnetic flux to move the plunger in an opposite direction to the one direction,wherein the electromagnetic actuator further comprises;
a plurality of sensor magnets disposed correspondingly to a plurality of plungers, respectively, each of the plurality of plungers being the plunger in each of the plurality of sets;
a sensor core made of a magnetic material and disposed in a position through which a magnetic flux from the plurality of sensor magnets can flow; and
a magnetic sensor that is disposed in a part of the sensor core through which respective magnetic fluxes of the plurality of sensor magnets can flow in common, and that detects a magnetic flux, which varies in accordance with respective movement positions of the plurality of plungers.
1 Assignment
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Accused Products
Abstract
An electromagnetic actuator (1) includes sensor magnets (21a, 21b) disposed correspondingly to plungers (11a, 11b), respectively. The electromagnetic actuator (1) further includes a sensor core (22) made of a magnetic material and disposed in a position through which magnetic fluxes from the plurality of sensor magnets (21a, 21b) can flow, and a magnetic sensor (23) that is disposed in a part of the sensor core (22) through which the magnetic fluxes of the plurality of sensor magnets (21a, 21b) can flow in common, and that detects the magnetic flux, which varies in accordance with respective positions of the plurality of plungers (11a, 11b).
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Citations
14 Claims
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1. An electromagnetic actuator comprising a plurality of sets, each of the sets including:
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a plunger made of a magnetic material; a spring biasing the plunger in one direction; a core made of a magnetic material; and a coil generating, in the core, a magnetic flux to move the plunger in an opposite direction to the one direction, wherein the electromagnetic actuator further comprises; a plurality of sensor magnets disposed correspondingly to a plurality of plungers, respectively, each of the plurality of plungers being the plunger in each of the plurality of sets; a sensor core made of a magnetic material and disposed in a position through which a magnetic flux from the plurality of sensor magnets can flow; and a magnetic sensor that is disposed in a part of the sensor core through which respective magnetic fluxes of the plurality of sensor magnets can flow in common, and that detects a magnetic flux, which varies in accordance with respective movement positions of the plurality of plungers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification