Magnetic latching mechanism for use in mating a mobile computing device to an accessory device

• US 8,688,037 B2
• Filed: 06/04/2009
• Issued: 04/01/2014
• Est. Priority Date: 09/26/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Chatterjee, Manjirnath, Liu, Eric, Corbridge, Mark, Kumar, Mukul, Crooijmans, Wim
• Primary Examiner(s): AKINYEMI, AJIBOLA A
• Application Number:
  US12/478,763
• Publication Number:
  US 20100081377A1
• Time in Patent Office: 1,762 Days
• Field of Search: 455/41.1
• US Class Current: 455/41.1
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations

Abstract

A mobile computing device and an accessory device are individually equipped with features and components that enable magnetic coupling of the two devices. Specific embodiments provide for the use of one or more horseshoe magnets for use in the magnetic coupling mechanisms. As an addition or alternative, electromagnetic coupling may be used to selectively maintain and/or orient the two devices in a mated position.

Claims

1. A system comprising:

a mobile computing device;

an accessory device having a receiving surface to magnetically couple to the mobile computing device; and

wherein at least one of the mobile computing device or the accessory device includes a plurality of magnetic components configured to retain the other of the mobile computing device or the accessory device, the plurality of magnetic components being arranged in a manner which reduces magnetic flux through a center of the mobile computing device;

wherein the plurality of magnetic components includes at least one horseshoe magnet assembly comprising;

a first bar magnet and a second bar magnet coupled in parallel;

a non-magnetic spacer element coupled between the first and second bar magnets; and

a base layer coupled to a first pole of each of the first and second bar magnets, wherein the first pole of the first bar magnet is opposite in polarity than the first pole of the second bar magnet.

2. The system of claim 1, wherein either the first or second bar magnets is longer than the other.

3. The system of claim 1, wherein the receiving surface is configured to magnetically couple to a housing element of the mobile computing device.

4. The system of claim 3, wherein the housing element at least partially forms a faç

ade of the mobile computing device, and is removably coupled to the mobile computing device.

5. The system of claim 4, wherein a surface of the housing element is substantially flush or uniform in appearance.

6. The system of claim 1, wherein only one of the mobile computing device or accessory device includes the plurality of magnetic components, and wherein the other of the mobile computing device or accessory device has material that is attracted to the plurality of magnetic components.

7. The system of claim 6, wherein the accessory device includes the plurality of magnetic components, and wherein the at least one horseshoe magnet assembly is provided a distance below the receiving surface of the accessory device.

8. The system of claim 6, wherein the plurality of magnetic components comprises a plurality of horseshoe magnet assemblies arranged in a circular configuration.

9. The system of claim 8, wherein the receiving surface includes a plurality of proud regions surrounding the plurality of horseshoe magnet assemblies, respectively.

10. A system comprising:

a mobile computing device comprising one or more electronic components;

an accessory device having (i) a receiving surface to magnetically couple to the mobile computing device and (ii) circuitry to communicate with the one or more electronic components of the mobile computing device when magnetically coupled; and

wherein the accessory device includes a plurality of magnetic components configured to retain the mobile computing device while reducing magnetic interference, from the magnetic component, during communications between the mobile computing device and the accessory device, the plurality of magnetic components being arranged in a manner which reduces magnetic flux through a center of the mobile computing device;

wherein the plurality of magnetic components includes at least one horseshoe magnet assembly comprising;

a first bar magnet and a second bar magnet coupled in parallel;

a non-magnetic spacer element coupled between the first and second bar magnets; and

a base layer coupled to a first pole of each of the first and second bar magnets, wherein the first pole of the first bar magnet is opposite in polarity than the first pole of the second bar magnet.

11. The system of claim 10, wherein the plurality of magnetic components are arranged to circumvent the circuitry.

12. The system of claim 10, wherein either the first or second bar magnets is longer than the other.

13. The system of claim 10, wherein each of the plurality of magnetic components is a horseshoe magnet assembly, and wherein the horseshoe magnet assemblies are arranged in a circular configuration.

14. The system of claim 10, wherein the receiving surface is configured to magnetically couple to a housing element of the mobile computing device.

15. The system of claim 14, wherein the housing element at least partially forms a faç

ade of the mobile computing device, and is removably coupled to the mobile computing device.

16. The system of claim 14, wherein the plurality of magnetic components comprises one or more electromagnets.

17. The system of claim 16, wherein the accessory device further comprises a proximity sensor coupled to the one or more electromagnets, the proximity sensor being configured to:

detect a proximity of the housing element of the mobile computing device to the receiving surface of the accessory device; and

control the one or more electromagnets based, at least in part, on the detected proximity.

18. The system of claim 17, wherein the proximity sensor is further configured to activate the one or more electromagnets upon determining that the housing element is within a first range of the receiving surface.

19. The system of claim 17, wherein the proximity sensor is further configured to deactivate the one or more electromagnets upon determining that the housing element is beyond a second range of the receiving surface.

20. The system of claim 10, wherein the mobile computing device is configured to inductively transmit or receive at least one of a power or data signal, and wherein the circuitry to communicate with the mobile computing device includes circuitry to inductively communicate with the mobile computing device in order to transmit or receive the at least one power or data signal.

21. A system comprising:

a mobile computing device;

an accessory device having a receiving surface; and

wherein at least one of the mobile computing device or accessory device includes one or more electromagnets to selectively retain the other of the mobile computing device or accessory device in one or more orientations, the plurality of electromagnets being arranged in a manner which reduces magnetic flux through a center of the mobile computing device;

wherein the plurality of electromagnets includes at least one horseshoe magnet assembly comprising;

a first bar magnet and a second bar magnet coupled in parallel;

a non-magnetic spacer element coupled between the first and second bar magnets; and

a base layer coupled to a first pole of each of the first and second bar magnets, wherein the first pole of the first bar magnet is opposite in polarity than the first pole of the second bar magnet.

22. The system of claim 21, wherein the at least one of the mobile computing device or the accessory device that includes the one or more electromagnets further comprises a proximity sensor coupled to the one or more electromagnets, the proximity sensor being configured to:

detect a proximity of the mobile computing device to the receiving surface of the accessory device; and

control the one or more electromagnets based, at least in part, on the detected proximity.

23. The system of claim 22, wherein the proximity sensor is further configured to activate the one or more electromagnets upon determining that the housing element is within a first range of the receiving surface.

24. The system of claim 22, wherein the proximity sensor is further configured to deactivate the one or more electromagnets upon determining that the housing element is beyond a second range of the receiving surface.