Magnetic actuators for haptic response

Patent metadata

Field	Value
Publication number	US-10651716-B2
Application number	US-201916352784-A
Country	US
Kind code	B2
Filing date	Mar 13, 2019
Priority date	Sep 30, 2013
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

In an embodiment, an actuator or circuit includes elements moveably coupled via bearings positioned between curved grooves. The bearings and the curves may exert a restorative force to return the elements to an original position after movement and may be spherical, cubic, cylindrical, and/or include gears that interact with groove gears. In some embodiments, an electrical coil may be coplanar with a surface of an element and a hard magnet may be positioned in the center and be polarized to stabilize or destabilize the element with respect to another element. In various embodiments, a magnetic circuit includes an element with an electrical coil wrapped in multiple directions around the element. In some embodiments, an actuator includes attraction elements and exertion of force causes an element to approach, contact, and/or magnetically attach to one of the attraction elements.

First claim

What is claimed is:

1. An actuator, comprising:
a fixed body element including a top structure, at least a first hard magnet and a second hard magnet having a fixed relationship with respect to the top structure, and at least a first side soft magnet and a second side soft magnet having a fixed relationship with respect to the top structure; and
a moveable body element that is moveably coupled to the fixed body element and includes at least one electrical coil disposed between and spaced apart from the first side soft magnet and the second side soft magnet;
wherein the moveable body element moves laterally, between the first side soft magnet and the second side soft magnet, in response to a lateral force exerted upon the moveable body element.

2. The actuator of claim 1 , wherein the moveable body element magnetically attaches to at least one of the first side soft magnet or the second side soft magnet upon contact.

3. The actuator of claim 1 , wherein applying the lateral force moves the moveable body element laterally to approach, contact, and magnetically attach to the first side soft magnet.

4. The actuator of claim 3 , wherein the contact of the moveable body element and the first side soft magnet is utilized to produce a tactile output for a user.

5. The actuator of claim 4 , wherein the tactile output is a tap.

6. The actuator of claim 3 , wherein the moveable body element remains magnetically attached to the first side soft magnet after application of the lateral force.

7. The actuator of claim 6 , wherein the moveable body element detaches from the first side soft magnet when at least one opposite lateral force is applied to the moveable body element.

8. The actuator of claim 1 , wherein the top structure comprises at least one soft magnet.

9. An electronic device, comprising:
a haptic output surface;
an array of hard magnets disposed below the haptic output surface and including a first hard magnet and a second hard magnet;
a soft magnet structure defining a first side soft magnet and a second side soft magnet, wherein,
the first hard magnet and the second hard magnet are disposed between the first side soft magnet and the second side soft magnet; and
the first side soft magnet and the second side soft magnet have fixed relationships with respect to the haptic output surface; and

a movable structure disposed below the array of hard magnets; wherein,
the movable structure includes an electrical coil; and
a first current induced in the electrical coil causes the movable structure to move toward the first side soft magnet.

10. The electronic device of claim 9 , wherein a second current induced in the electrical coil causes the movable structure to move toward the second side soft magnet.

11. The electronic device of claim 9 , wherein:
the soft magnet structure comprises a top structure parallel to the electrical coil; and
at least portions of the first side soft magnet and the second side soft magnet extend perpendicularly from the top structure.

12. The electronic device of claim 11 , wherein the top structure, the first side soft magnet and the second side soft magnet are portions of a single soft magnet.

13. The electronic device of claim 11 , wherein each of the top structure, the first side soft magnet, and the second side soft magnet is a separate soft magnet.

14. The electronic device of claim 9 , wherein the movable structure moves laterally between the first side soft magnet and the second side soft magnet.

15. The electronic device of claim 9 , wherein the movable structure magnetically attaches to the first side soft magnet upon contacting the first side soft magnet.

16. The electronic device of claim 9 , wherein the movable structure remains magnetically attached to the first side soft magnet after the first current is removed and until a second current is induced in the electrical coil.

17. The electronic device of claim 9 , further comprising:
a track pad or touch pad; wherein,
the track pad or touch pad defines the haptic output surface.

18. The electronic device of claim 9 , further comprising:
a housing for a smart phone or a tablet computing device; wherein,
the housing defines the haptic output surface.

19. The electronic device of claim 9 , wherein the haptic output surface is a surface of a wearable device.

20. The electronic device of claim 9 , wherein:
the movable structure comprises a base;
the base comprises at least one soft magnet; and
the electrical coil is attached to the base.

Assignees

• Apple Inc

Inventors

• Moussette Camille
• Morrell John S
• Kessler Patrick
• Weiss Samuel

Classifications

• H02K7/108

  with friction clutches · CPC title

• G06F3/01

  Input arrangements or combined input and output arrangements for interaction between user and computer (G06F3/16 takes precedence) · CPC title

• H02K7/08

  Structural association with bearings · CPC title

• H02K33/16 Primary

  with polarised armatures moving in alternate directions by reversal or energisation of a single coil system · CPC title

• G06F3/016 Primary

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title