Inductive spring system

• US 9,805,864 B2
• Filed: 04/04/2014
• Issued: 10/31/2017
• Est. Priority Date: 04/04/2014
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Kasar, Darshan R.
• Primary Examiner(s): Lee, Benny
• Assistant Examiner(s): Rahman, Hafizur
• Application Number:
  US14/245,617
• Publication Number:
  US 20150287527A1
• Time in Patent Office: 1,306 Days
• Field of Search: 333 12, 333 24 R, 333177, 333180
• CPC Class Codes: H01F 2038/146 in combination with capacitive coupling
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

An electrical connector system for communication or power transfer between a two connectors in which the first of the two connectors may be inserted into a receptacle of a second connector in order to align a coil within the first connector with a coil within the second connector to promote inductive communication between the first and second connector. In many embodiments, at least one of the two coils may also be used as a spring, providing a mechanical force. The mechanical force may assist in joining or separating the connectors. For example, the spring coil may be used in conjunction with a push-push mechanism to retain the first connector within the second connector and to eject the first connector when the connectors should be separated.

Claims

1. An electrical connector system comprising:

a first connector comprising;

an insert portion; and

a first electromagnetic coil positioned within the insert portion;

a second connector comprising;

a receptacle sized to receive the insert portion of the first connector; and

a second electromagnetic coil configured to compress to a first selected dimension in response to receiving the insert portion within the receptacle;

wherein the first selected dimension is based at least in part on a mutual inductance characteristic between the first electromagnetic coil and the second electromagnetic coil when the insert portion is received in the receptacle.

2. The connector system of claim 1, wherein the second connector further comprises a latch configured to retain the first connector within the receptacle of the second connector.

3. The connector system of claim 2, wherein the first connector further comprises a recess for receiving the latch of the second connector.

4. The connector system of claim 2, wherein the latch comprises a push-push mechanism.

5. The connector system of claim 1, wherein the electromagnetic coil of the first connector is configured to compress to a selected dimension in response to insertion into the receptacle;

and

wherein the selected dimension is based at least in part on a mutual inductance characteristic between the first electromagnetic coil and the second electromagnetic coil when the insert portion is received in the receptacle.

6. The connector system of claim 1, wherein the electromagnetic coil of the first connector and the electromagnetic coil of the second connector are adapted for inductive power transfer when the insert portion is received in the receptacle.

7. The connector system of claim 1, wherein the electromagnetic coil of the first connector and the electromagnetic coil of the second connector are adapted for electromagnetic signal transfer when the insert portion is received in the receptacle.

8. The connector system of claim 1, wherein each of the insert portion and the receptacle are cylindrical.

9. A method of electromagnetic transmission comprising:

positioning a first electromagnetic coil inductively proximate a second electromagnetic coil;

compressing the second electromagnetic coil to a selected dimension; and

varying a magnetic field in the first electromagnetic coil;

wherein the selected dimension is based at least in part on a mutual inductance characteristic between the first electromagnetic coil and the second electromagnetic coil when the second electromagnetic coil is compressed.

17. The method of claim 9, further comprising at least temporarily fixing the position of the first electromagnetic coil relative to the second electromagnetic coil.

19. The method of claim 9, wherein the first electromagnetic coil is disposed within a housing;

and

the second electromagnetic coil is disposed within a receptacle sized to receive the housing.

20. The method of claim 9, wherein the second electromagnetic coil comprises a copper alloy.

21. The method of claim 17, wherein fixing the position of the first electromagnetic coil relative to the second electromagnetic coil comprises latching the first electromagnetic coil with a latch mechanism.

22. The method of claim 21, wherein the latch mechanism comprises a push-push mechanism.

23. The method of claim 17, wherein fixing the position of the first electromagnetic coil relative to the second electromagnetic coil comprises rotatably tightening the second electromagnetic coil around the first electromagnetic coil.

10. An electrical connector system comprising:

a first connector comprising;

a housing; and

a first electromagnetic coil positioned within the housing and configured to compress to a first selected dimension in response to a compressive force applied to the housing;

a second connector comprising;

a receptacle sized to receive the housing of the first connector; and

a second electromagnetic coil positioned around the receptacle;

wherein the first selected dimension is based at least in part on a mutual inductance characteristic between the first electromagnetic coil and the second electromagnetic coil when the insert portion is received in the receptacle.

11. The connector system of claim 10, wherein the second connector further comprises a latch configured to retain the first connector within the receptacle of the second connector.

12. The connector system of claim 11, wherein the first connector further comprises a recess for receiving the latch of the second connector.

13. The connector system of claim 11, wherein the latch comprises a push-push mechanism.

14. The connector system of claim 10, wherein the electromagnetic coil of the first connector and the electromagnetic coil of the second connector are adapted for inductive power transfer when the housing is received in the receptacle.

15. The connector system of claim 10, wherein the electromagnetic coil of the first connector and the electromagnetic coil of the second connector are adapted for electromagnetic signal transfer when the housing is received in the receptacle.

16. The connector system of claim 10, wherein the housing and the receptacle are cylindrical.

18. A method of electromagnetic transmission comprising:

positioning a first electromagnetic coil within a second electromagnetic coil;

tightening the second electromagnetic coil to a selected diameter so as to at least partially restrain the first electromagnetic coil within the second electromagnetic coil;

varying a magnetic field in the first electromagnetic coil to induce a voltage within the second electromagnetic coil;

loosening the second electromagnetic coil;

removing the first electromagnetic coil from the second electromagnetic coil.