Double-threaded connector
A double-threaded connector or spacer according may be self-threading such that insertion into a mounting hole in a PCB will cause the interior of the mounting hole to become threaded to match the double-threaded connector or spacer. The double- threaded connector or spacer installed in a mounting hole of a carrier. A “half circle” portion of daughter card is held in place between the double-threaded connector or spacer and screw. The half circle portion of the daughter card is plated to make electrical contact with the double-threaded connector or spacer, for example, to allow for grounding of the daughter card via the carrier, e.g., PCB.
1. An electronic assembly, comprising:
a printed circuit board having an upper surface, the printed circuit board defining at least one mounting hole extending through the upper surface;
a cylindrical plate defining a central opening, the cylindrical plate located on the upper surface of the printed circuit board, wherein a diameter of the at least one mounting hole is less than a diameter of the central opening of the cylindrical plate;
a daughter board having a mounting recess along a side thereof;
a component extending through one of the at least one mounting holes; the component comprising:
an outer body;
a first cylindrical stage on the outer body and having a diameter less than a width of the outer body;
a second cylindrical stage extending from the outer body in a direction opposite the first cylindrical stage and having a diameter less than a width of the outer body;
a threaded bore extending through the first cylindrical stage and outer body and into the second cylindrical stage; and
an outer thread extending on an external surface of the second cylindrical stage; and
a screw extending through the threaded bore,
wherein a portion of the daughter board contacts the component.
2. The electronic assembly of claim 1 , further comprising an electrically conductive layer on at least a portion of an outer surface of the second cylindrical stage.
3. The electronic assembly of claim 1 , wherein the portion of the daughter board that contacts the component is the mounting recess.
4. The electronic assembly of claim 1 , wherein the first cylindrical stage of the component contacts the daughter board.
5. The electronic assembly of claim 1 , wherein the outer body of the component contacts the daughter board.
6. The electronic assembly of claim 1 , wherein the outer thread includes a plurality of distal threads and a plurality of proximal threads, wherein the distal threads have a profile different than a profile of the proximal threads to facilitate self-threading the component within the mounting hole.
7. The electronic assembly of claim 1 , wherein the central opening of the cylindrical plate is aligned with the at least one mounting hole.
8. A method of installing a daughter board on a printed circuit board, comprising:
threading a component into a mounting hole defined by the printed circuit board, the printed circuit board having an upper surface, the component comprising:
an outer body; a first cylindrical stage on the outer body and having a diameter less than a width of the outer body;
a second cylindrical stage extending from the outer body in a direction opposite the first cylindrical stage and having a diameter less than a width of the outer body;
a threaded bore extending through the first cylindrical stage and outer body and into the second cylindrical stage;
an outer thread extending on an external surface of the second cylindrical stage;
providing a daughter board adjacent the component; and
applying a screw in the threaded bore causing the component to removably clamp the daughter board to the component,
wherein a cylindrical plate is located on the upper surface of the printed circuit board, the cylindrical plate defining a central opening, wherein a diameter of the mounting hole is less than a diameter of the central opening of the cylindrical plate.
9. The method of claim 8 , further comprising an electrically conductive layer on at least a portion of an outer surface of the second cylindrical stage.
10. The method of claim 8 , wherein an outer surface of the second cylindrical stage includes an outer surface electrically conductive layer and the daughter board includes a daughter board electrically conductive region, the method further comprising electrically connecting the daughter board to the printed circuit board via the daughter board electrically conductive region, the outer surface electrically conductive layer and the cylindrical plate.
11. The method of claim 8 , wherein threading the component into the mounting hole further includes threading the mounting hole with the component, wherein the outer thread includes a plurality of distal threads and a plurality of proximal threads, wherein the distal threads have a profile different than a profile of the proximal threads.
12. An electronic assembly, comprising:
a printed circuit board having an upper surface, the printed circuit board defining a mounting hole having a first diameter and extending through the upper surface;
a cylindrical plate defining a central opening having a second diameter, the cylindrical plate located on the upper surface of the printed circuit board, wherein the first diameter is less than the second diameter; and
a component extending through the mounting hole, the component comprising:
an intermediate body having a first width;
a first stage extending from the intermediate body, the first stage having a second width less than the first width;
a second stage extending from the intermediate body in a direction opposite the first stage, the second stage having a third width less than the first width; and
an outer thread extending on an external surface of the second stage,
wherein the component defines a threaded bore extending through the first stage and intermediate body and into the second stage.
13. The electronic assembly of claim 12 , further comprising an electrically conductive layer on at least a portion of an outer surface of the second stage.
14. The electronic assembly of claim 12 , further comprising a daughter board having a mounting recess along a side thereof, wherein the mounting recess contacts the component.
15. The electronic assembly of claim 14 , wherein the mounting recess is semicircular.
16. The electronic assembly of claim 15 , wherein the first stage of the component contacts the daughter board.
17. The electronic assembly of claim 15 , wherein the intermediate body of the component contacts the daughter board.
18. The electronic assembly of claim 12 , wherein the central opening of the cylindrical plate is aligned with the mounting hole.
19. The electronic assembly of claim 12 , wherein the outer thread includes a plurality of distal threads and a plurality of proximal threads, wherein the distal threads have a profile different than a profile of the proximal threads to facilitate self-threading the component within the mounting hole.