Magnetic Connector

• US 20130323941A1
• Filed: 05/29/2013
• Published: 12/05/2013
• Est. Priority Date: 06/04/2012
• Status: Active Grant

• Current Assignee: Adonit co. Ltd.
• Original Assignee: Adonit co. Ltd.
• Inventors: Zeliff, Zachary Joseph, Li, Yueh Hua, Perpich, Kristopher, Huang, Yu Tzu, Lu, Kai Yi
• Granted Patent: US 9,112,303 B2
• Time in Patent Office: Days
• US Class Current: 439/39
• CPC Class Codes: H01R 11/30 End pieces held in contact by a magnet
• CPC Class Codes: H01R 13/2478 spherical
• CPC Class Codes: H01R 13/6205 Two-part coupling devices held in engagement by a magnet

Abstract

Embodiments of magnetic connectors are disclosed. Embodiments show the use of magnetic connectors for power and/or signal bus coupling to electronic devices from support bases, stands, or cables. In some embodiments, spherical contacts, such as ball bearings, are pressed into firm contact with an electronic device by the use of conductive springs, which in turn electrically couple the spherical contacts to the bus lines. Contact arrangements are shown which allow rotation of the electronic device against an embodiment of magnetic connector. Arrangements of multiple magnets having differing polarities are shown when alignment of an electronic device in a particular orientation is required.

Claims

1. A power charger comprising:

a magnet;

a contact;

a housing; and

a plug, the plug comprising a first power trace and a second power trace;

wherein the plug is mounted in a fixed manner in the housing, the magnet is mounted in a fixed manner in the housing, the contact is mounted in the housing, the contact is electrically coupled to the first power trace, and the magnet is electrically coupled to the second power trace.

2. The power charger of claim 1, wherein the magnet is an annular magnet, the contact is disposed within the central hole of the annular magnet, and the contact is electrically insulated from the magnet.

3. The power charger of claim 2, wherein the contact is biased above a face of the annular magnet.

4. The power charger of claim 2, wherein the contact is a metal sphere.

5. The power charger of claim 4, further comprising a conductive spring, the conductive spring biasing the contact above a surface of the magnet, and the conductive spring electrically coupling the contact to the first power trace.

6. The power charger of claim 1, wherein the power coupler is a USB connector.

7. The power charger of claim 1, wherein the housing further comprises a lip, the lip defining a socket for orienting a charging coupler of a device such that the charging coupler positions a charging terminal against the magnet.

8. The power charger of claim 7 where the magnet holds the device firmly against the power charger at any orientation.

9. A magnetic coupler assembly comprising a first mating element and a second mating element, the first mating element comprising:

a housing having an alignment cavity, a plug assembly fixedly mounted to the housing, the plug assembly comprising a plurality of conductive contacts, a first magnet comprising a magnetic mating surface, a first electrical contact electrically coupled to the first magnet;

a contact member disposed within the first magnet and electrically insulated from the first magnet, a second electrical contact electrically coupled to the contact member; and

the first electrical contact coupled to a first conductive contact of the plurality of conductive contacts, the second electrical contact coupled to a second conductive contact of the plurality of conductive contacts; and

the second mating element comprising;

an outer surface, a ferromagnetic conducting element having a mating surface, and a second conducting element insulated from the ferromagnetic conducting element;

the outer surface fitting within the alignment cavity of the first mating element such that the mating surface of the ferromagnetic conducting element mates with the magnetic mating surface and the second conducting element electrically couples to the contact member.

10. The magnetic coupler assembly of claim 9 where the contact member is a sheet metal spring.

11. The magnetic coupler assembly of claim 9 where the contact member is a ball bearing, and the ball bearing is biased above the magnetic mating surface by a spring, said spring electrically coupling the ball bearing to the second conductive contact of the plug assembly.

12. The magnetic coupler assembly of claim 11 where the spring is a sheet metal spring integrally formed in the second electrical contact.

13. The magnetic coupler assembly of claim 11 where the spring is a coil spring.

14. The magnetic coupler assembly of claim 9 wherein:

the first mating element further comprises a second magnet disposed such that a magnetic polarity of the second magnet is opposite a magnetic polarity of the first magnet, the magnetic polarity of the first magnet being normal to the magnetic mating surface of the first magnet; and

the ferromagnetic conducting element of the second mating element is a third magnet, and the second mating element further comprises a fourth magnet, the third magnet and fourth magnet being fixedly mounted in the second mating element, the third magnet and fourth magnet being oriented to expose opposite magnetic polarities, the magnetic polarity of the third magnet being oriented normal to the mating surface.

15. A magnetic connector comprising:

a first mating element fixedly mounted in a housing, at least one contact member, a plug fixedly mounted in the housing;

the plug having a plurality of leads, the first mating element electrically coupled to a first lead of the plurality of leads; and

the contact member electrically coupled to a second lead of the plurality of leads, the first mating element being an annular permanent magnet having a center hole, the contact member being a ball bearing disposed within an electrically insulating column, the electrically insulated column disposed within the center hole of the annular permanent magnet.

16. The magnetic connector of claim 15 wherein the second mating element is a ball bearing, the electrically insulated column constricts at an end through which the second mating element protrudes, the second mating element is biased outwardly by a coil spring, and the coil spring electrically couples the second mating element to the second lead.

17. The magnetic connector of claim 15 further comprising a plurality of contact members, each contact member disposed within an electrically insulated column of a plurality of electrically insulated columns, each contact member electrically coupled to a lead of the plurality of leads.

18. The magnetic connector of claim 17 wherein each contact member of the plurality of contact members is a ball bearing, the each electrically insulated column of the plurality of electrically insulated columns constricts at an end through which its respective contact member protrudes, the each contact member of the plurality of contact members is biased outwardly by a coil spring of a plurality of coil springs, and each coil spring of the plurality of coil springs electrically couples the each contact member of the plurality of contact members to the lead of the plurality of leads.

19. The magnetic connector of claim 18 where each contact member of the plurality of contact members is in electrical contact with a different lead of the plurality of leads.

20. The magnetic connector of claim 15 further comprising a base, the base being mountable to a surface to provide a stable releasable attachment for an electronic device.