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US 9,928,950 B2Granted
Polarized magnetic actuators for haptic response
AssigneeApple Inc.
InventorsNicholaus Ian Lubinski, James E. Wright, Jonah A. Harley, John M. Brock, Keith J. Hendren, Storrs T. Hoen
Life of this patent
Estimating the term…
Abstract
A polarized electromagnetic actuator includes a movable armature, a stator, and at least one coil wrapped around the stator. At least one permanent magnet is disposed over the stator. When a current is applied to the at least one coil, the at least one coil is configured to reduce a magnetic flux of at least one permanent magnet in one direction and increase a magnetic flux of at least one permanent magnet in another direction. The movable armature moves in the direction of the increased magnetic flux.
Claims24
A polarized electromagnetic actuator, comprising:
- a stator including two tines extending out from the stator;
- a movable armature disposed over the two tines of the stator;
- a first stabilizing element connecting the movable armature and the stator;
- a second stabilizing element connecting the movable armature and the stator;
- a first coil positioned around one tine;
- a second coil positioned around the other tine;
- a first permanent magnet disposed over the stator between the two tines, wherein a magnetic flux of the first and the second coils increases a magnetic flux of the first permanent magnet in one direction to produce motion in the movable armature;
- and
- a second permanent magnet disposed over the stator between the two tines;
- wherein
- the first stabilizing element is disposed around a first end of the stator and a first end of the moveable armature;
- and
- the second stabilizing element is disposed around a second end of the stator and a second end of the moveable armature.
10 more elements
A polarized electromagnetic actuator, comprising:
- a stator including two tines extending out from the stator;
- a movable armature positioned between the two tines of the stator;
- a first coil positioned around one tine;
- a second coil positioned around the other tine;
- and
- a permanent magnet disposed under the movable armature and over the stator between the two tines, wherein a magnetic flux of the first and second coils increases a magnetic flux of the permanent magnet in one direction to produce motion in the movable armature.
3 more elements
A polarized electromagnetic actuator, comprising:
- a movable armature including two tines extending out from the armature;
- a stator disposed over the two tines of the movable armature;
- a permanent magnet disposed under the stator and over the movable armature between the two tines;
- a first coil positioned around the stator between one tine of the armature and the permanent magnet;
- and
- a second coil positioned around the stator between the other tine and the permanent magnet.
3 more elements
A polarized electromagnetic actuator, comprising:
- a stator including two tines extending out from the stator;
- a coil positioned around the stator between the two tines;
- a first permanent magnet disposed over one tine of the stator;
- a second permanent magnet disposed over the other tine of the stator;
- and
- a movable armature including a first arm disposed over the first permanent magnet and a second arm disposed over the second permanent magnet and a body disposed between the two tines, wherein a magnetic flux of the coil increases a magnetic flux of one permanent magnet to produce motion in the movable armature in a direction of the increased magnetic flux.
3 more elements
A polarized electromagnetic actuator, comprising:
- a stator including two tines extending out from the stator;
- a coil positioned around the stator between the two tines;
- a movable armature including:
- a first arm disposed over one tine of the stator;
- a second arm disposed over the other tine of the stator;
- and
- a body disposed between the two tines;
- a first permanent magnet attached to the first arm of the movable armature and disposed over one tine of the stator;
- and
- a second permanent magnet attached to the second arm of the movable armature and disposed over the other tine of the stator,
- wherein a magnetic flux of the coil increases a magnetic flux of one permanent magnet to produce motion in the movable armature in a direction of the increased magnetic flux.
8 more elements
A method for providing a polarized electromagnetic actuator comprising:
- providing a stator that includes two tines extending out from the stator;
- providing a movable armature between the two tines of the stator;
- providing a first coil positioned around a first tine of the stator and a second coil positioned around a second tine of the stator;
- providing at least one permanent magnet under the movable armature and over the stator between the two tines;
- and
- configuring the at least one coil to increase a magnetic flux of the at least one permanent magnet in one direction when a current is applied to the at least one coil, wherein the movable armature moves in the direction of the increased magnetic flux.
3 more elements
A polarized electromagnetic actuator, comprising:
- a stator including two tines extending out from the stator;
- a coil positioned around the stator between the two tines;
- a movable armature including a first arm disposed over one tine of the stator, a second arm disposed under the other tine of the stator, and a body disposed between the two tines;
- a first permanent magnet attached to one tine of the stator;
- and
- a second permanent magnet attached to the other tine of the stator, wherein the coil produces a first magnetic flux when a current is applied to the coil and the magnetic flux of the coil increases a magnetic flux of one permanent magnet to produce motion in the movable armature in a direction of the increased magnetic flux.
3 more elements
A method for providing a polarized electromagnetic actuator comprising:
- providing a stator that includes two tines extending out from the stator;
- providing a movable armature spaced having an arm disposed over each tine of the stator and body disposed between the two tines of the stator;
- providing at least one coil positioned around the stator between the two tines;
- providing a first permanent magnet between a first arm of the movable armature and a first tine of the stator that the arm is disposed over;
- providing a second permanent magnet between a second arm of the movable armature and a second tine of the stator that the arm is disposed over;
- and
- configuring the at least one coil to increase a magnetic flux of at least one permanent magnet in one direction when a current is applied to the at least one coil, wherein the movable armature moves in the direction of the increased magnetic flux.
4 more elements
Dependencies are inferred from the claim text.