Connector-free magnetic charger/winder

• US 9,450,446 B2
• Filed: 04/28/2014
• Issued: 09/20/2016
• Est. Priority Date: 04/28/2014
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Baker, John J., Rothkopf, Fletcher R.
• Primary Examiner(s): Rossoshek, Helen
• Application Number:
  US14/263,949
• Publication Number:
  US 20150311741A1
• Time in Patent Office: 876 Days
• Field of Search: 320/108, 320/107, 320/114, 320/116, 320/118
• US Class Current: 1/1
• CPC Class Codes: G04C 3/00 Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means synchronisation G04C11/00
• CPC Class Codes: G04C 3/08 wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork , e.g. electrostatically
• CPC Class Codes: G04C 5/005 Magnetic or electromagnetic means
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/32 for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
• CPC Class Codes: H02K 49/108 with an axial air gap
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A method and apparatus for charging an electronic device include rotating a magnetically attractable element, or element, within the electronic device. Rotating a magnet external to the electronic device simultaneously rotates the element. Rotating the element causes an electrically generating device, such as a generator, to create an electric charge in the electronic device. The electric charge may be used to power the electrically generating device, or the electric charge may be transmitted to an internal power supply in order to charge another component or components. In another embodiment, the external magnet may wind a spring inside a device.

Claims

1. A non-contact method for providing power to a component disposed in an electronic device having a housing, at least a portion of the housing is formed of a non-magnetic material, the non-contact method comprising:

magnetically coupling a rotating magnetic field with a charge generator positioned within the housing causing the charge generator to rotate in accordance with the rotating magnetic field, wherein at least some of the rotating magnetic field passes through the non-magnetic portion of the housing;

generating an amount of charge by the charge generator in accordance with the rotating magnetic field; and

passing at least some of the amount of charge from the charge generator to the component.

2. The non-contact method as recited in claim 1, wherein the charge generator is coupled to an internal drive mechanism.

3. The non-contact method as recited in claim 2, wherein the rotating magnetic field is provided by a rotating magnetic element.

4. The non-contact method as recited in claim 2, wherein the rotating magnetic field is associated with an external drive mechanism free of contact with the charge generator.

5. The non-contact method as recited in claim 4, wherein the internal drive mechanism remains magnetically coupled to the external drive mechanism during rotation of the external drive mechanism.

6. The non-contact method as recited in claim 4, wherein the internal drive mechanism comprises a ferrous material that is magnetically attracted to the external drive mechanism.

7. The non-contact method as recited in claim 6, wherein the internal drive mechanism is capable of an oscillatory rotation, the oscillatory rotation comprising a first rotation and a second rotation opposite the first rotation.

8. The non-contact method as recited in claim 7, wherein the charge generator creates a first charge based upon the first rotation and a second charge based upon the second rotation, the second charge opposite the first charge.

9. The non-contact method as recited in claim 1, wherein the component is a battery.

10. The non-contact method as recited in claim 1, wherein the housing is free of apertures.

11. A portable electronic device having an enclosure defining an internal cavity, the portable electronic device comprising:

a charge generator disposed within the internal cavity; and

a magnetically attractable member disposed within the internal cavity and rotatably coupled to the charge generator, the magnetically attractable member configured to rotate in response to an externally applied rotating magnetic field,

wherein the charge generator creates electrical energy based upon a rotation of the magnetically attractable member.

12. The portable electronic device as recited in claim 11, wherein the magnetically attractable member is a vibrational head of a vibrational motor within the portable electronic device.

13. The portable electronic device as recited in claim 11, wherein rotation of the magnetically attractable member mirrors rotation of the externally applied rotating magnetic field.

14. The portable electronic device as recited in claim 11, wherein the charge generator comprises a shaft and an element, and wherein the element is a magnet magnetically coupled with the magnetically attractable member.

15. The portable electronic device according to claim 11, wherein the electrical energy created within the charge generator is proportional to a rotational speed of the externally applied rotating magnetic field.

16. The portable electronic device as recited in claim 11, wherein the magnetically attractable member and the charge generator are both free of contact with a device that supplies the externally applied rotating magnetic field.

17. The portable electronic device as recited in claim 11, further comprising a battery disposed within the internal cavity, wherein the battery receives and stores the electrical energy.

18. The portable electronic device as recited in claim 11, wherein the enclosure comprises a non-magnetic portion allowing the externally applied magnet field to pass through the non-magnetic portion.