Low-profile axisymmetric power connectors
Power connectors that are easy to connect, have a low profile, and can convey one or more data signals. One example can provide a power connector that is easy to connect by providing an axisymmetric connector receptacle and connector insert. Magnets can be used to help guide a connection between a connector insert and a connector receptacle. Canted springs can be used to provide a tactile response to the insertion of the connector insert into the connector receptacle and to help to secure the connector insert in place when mated with the connector insert. Keying or self-aligning features can be included on either or both the connector insert and the connector receptacle to help guide mating.
1. A power connector system comprising:
a connector receptacle comprising:
a protrusion supporting a connect-detect contact in the center of the protrusion;
a first power contact on the protrusion; and
a second power contact around the protrusion, the second power contact separate from the protrusion by a first recess; and
a connector insert comprising:
a connect-detect contact; and
a cylinder around the connect-detect contact, the cylinder separated from the connect-detect contact by a second recess, where an inside of the cylinder supports a first power supply contact and the cylinder further supports a second power supply contact around the connect detect contact,
wherein the connector receptacle comprises keying features formed as tabs on an inside surface of a third recess in the protrusion, and the connector insert comprises a cam around the connect-detect contact, the cam comprising keying features formed as side notches.
2. The power connector system of claim 1 wherein the connector receptacle and the connector insert mate in a connection direction, and the tabs of the connector receptacle fit in the side notches of the connector insert.
3. The power connector system of claim 2 wherein the protrusion of the connector receptacle fits in the second recess of the connector insert and the cylinder of the connector insert fits in the first recess of the connector receptacle.
4. The power connector system of claim 3 wherein the connector receptacle further comprises a magnet and the connector insert comprises a ferro-magnetic ring around the cylinder.
5. The power connector system of claim 4 wherein the first power contact of the connector receptacle is a power supply contact and the second power contact of the connector receptacle is a ground contact.
6. The power connector system of claim 5 wherein the connect-detect contact in the connector insert is a spring-biased contact, and the connect-detect contact and the cam of the connector insert fit in the third recess in the protrusion of the connector receptacle.
7. The power connector system of claim 6 wherein an inside surface of the first recess of the connector receptacle comprises a circumferential groove, the connector receptacle further comprising a canted coil spring in the circumferential groove.
8. The power connector system of claim 7 further comprising a C-clip located within the canted coil spring.
9. The power connector system of claim 1 wherein the cam has a curved front surface to guide the tabs of the connector receptacle into the side notches when the connector insert is connected to the connector receptacle.
10. A connector receptacle comprising:
an annular ground ring defining a first recess;
an annular housing in the first recess, the annular housing around a second recess;
a plurality of contacts radially positioned on an outside surface of the annular housing and in the first recess;
a connect-detect contact located in the second recess; and
a lead frame, wherein each of the plurality of contacts terminates in the lead frame.
11. The connector receptacle of claim 10 wherein a corresponding connector insert can be inserted into the connector receptacle in a connection direction and the lead frame is arranged to route signals from the plurality of contacts in directions orthogonal to the connection direction.
12. The connector receptacle of claim 11 further comprising a first magnet and a second magnet, each magnet on opposite sides of the first recess.
13. The connector receptacle of claim 12 wherein the annular housing further comprises keying features extending into the second recess.
14. The connector receptacle of claim 13 further comprising:
a trim ring; and
a canted coil spring,
wherein the trim ring is adjacent to the annular ground ring such that a dovetailed groove is formed between the trim ring and the annular ground ring, and wherein the canted coil spring is located in the dovetailed groove.
15. The connector receptacle of claim 14 further comprising a C-clip located within the canted coil spring.
16. A connector insert comprising:
an annular plug tip having an inside surface;
an annular housing adjacent to the inside surface of the annular plug tip and defining a recess, the annular housing comprising a plurality of openings;
a plurality of contacts radially positioned to have contacting surfaces on an inside surface of the annular housing and in the recess, each contacting surface at a corresponding one of the plurality of openings; and
a connect-detect contact in the recess,
a cam around the connect-detect contact, the cam comprising keying features formed as side notches.
17. The connector insert of claim 16 further comprising a lead frame, wherein each of the plurality of contacts terminates in the lead frame.
18. The connector insert of claim 17 further comprising an interposer supporting the lead frame.
19. The connector insert of claim 18 further comprising a ferro-magnetic ring to be attracted to a magnet in a corresponding connector receptacle.
20. The connector insert of claim 16 wherein the cam has a curved front surface to guide alignment features of a connector receptacle into the side notches of the cam when the connector insert is connected to the connector receptacle.