Waterproof board-to-board connectors
Board-to-board connectors that may provide durable and reliable connections, may save board space, and may be easy to manufacture. One example may provide board-to-board connectors that provide durable connections by providing a seal between board-to-board plugs and receptacles. The seal may be an O-ring, gasket, or other seal. The seal may protect contacts on the board-to-board connectors from exposure to fluids, such as water or other corrosive fluids. This seal may provide a level of redundancy with one or more seals protecting a device from external fluids, such as a seal at or in the device enclosure.
1. A board-to-board connector comprising:
a board-to-board connector insert comprising a first plurality of contacts and a frame, wherein the frame has an upper surface, a surface perpendicular to the upper surface, and a notch in the surface perpendicular to the upper surface;
a board-to-board connector receptacle comprising a corresponding second plurality of contacts, wherein the board-to-board connector receptacle is configured to be inserted into the frame of the board-to-board connector insert; and
a seal between the board-to-board connector insert and the board-to-board connector receptacle, wherein the seal is an O-ring and the O-ring is located in the notch of the board-to-board connector insert.
2. The board-to-board connector of claim 1 wherein the O-ring is attached to the board-to-board connector insert and completely surrounds the first plurality of contacts to form a continuous seal.
3. The board-to-board connector of claim 2 wherein the O-ring has a circular cross section.
4. The board-to-board connector of claim 2 wherein the O-ring is a multi-lobed O-ring.
5. The board-to-board connector of claim 2 wherein the seal is coated with a lubricant.
6. The board-to-board connector of claim 1 wherein the seal is formed using silicone.
7. An electronic device comprising:
a first board comprising a first plurality of traces;
a board-to-board receptacle attached to the first board, the board-to-board receptacle comprising a first plurality of contacts electrically connected to the first plurality of traces;
a board-to-board insert inserted in the board-to-board receptacle, the board-to-board insert comprising a second plurality of contacts electrically connected to the first plurality of contacts;
a seal between the board-to-board receptacle and the board-to-board insert, wherein the seal is a pressure-sensitive adhesive; and
a second board attached to the board-to-board insert, the second board comprising a second plurality of traces electrically connected to the second plurality of contacts.
8. A method of manufacturing a board-to-board connector, the method comprising:
molding a housing for a board-to-board connector at least partially around a plurality of contacts to form a board-to-board connector plug;
forming a silicone ring on a shell;
attaching the shell to the board-to-board connector plug; and
piercing the silicone ring with contacts on a board-to-board connector receptacle to connect the board-to-board connector plug to the board-to-board connector receptacle.
9. The method of claim 8 wherein the housing is plastic.
10. The method of claim 8 wherein forming the silicone ring on the shell comprises insert molding the silicone ring along an inside edge of the shell.
11. The method of claim 8 wherein molding the housing for the board-to-board connector comprises injection molding the housing around portions of the plurality of contacts.
12. The board-to-board connector of claim 1 wherein the board-to-board connector receptacle comprises a frame to receive the board-to-board connector insert, the frame includes a notch, and the O-ring is located in the notch.
13. The board-to-board connector of claim 12 wherein the board-to-board connector insert has an upper surface, the board-to-board connector receptacle has a surface parallel to the upper surface, and the notch is in the surface parallel to the upper surface.
14. The board-to-board connector of claim 1 wherein the board-to-board connector insert comprises a clip, the board-to-board connector receptacle comprises a notch, and the clip is seated within the notch when the board-to-board connector insert is inserted into the board-to-board connector receptacle.
15. The board-to-board connector of claim 1 wherein the first plurality of contacts pierces the seal and forms an electrical connection with the second plurality of contacts when the board-to-board connector insert is inserted into the board-to-board connector receptacle.
16. The board-to-board connector of claim 2 wherein the O-ring is a ring with a circular cross section and the O-ring is formed from a material selected from the group consisting of: silicon, silicone, rubber, plastic, nylon, elastomers, liquid-crystal polymers, and ceramics.
17. The electronic device of claim 7 wherein the pressure-sensitive adhesive is double-sided.
18. The electronic device of claim 7 further comprising potting material that seals the first board to the board-to-board receptacle.