Printed circuit board thumbscrew locking reinforcement structure

1 . A reinforcement structure for reinforcing a thumbscrew that fastens a printed circuit board (PCB) assembly to a metal carrier, the reinforcement structure comprising:

a cap configured to engage with the thumbscrew, the cap comprising:

a hollow cylindrical body having an outer sidewall; and

outer gears disposed on the outer sidewall; and

a base configured to attach to the PCB assembly, the base comprising:

a planar plate having two or more outer edges and an inner hole;

an inner sidewall extending from the inner hole downward perpendicularly from the planar plate;

first and second retaining tabs on a lower portion of the inner sidewall, wherein the first and second retaining tabs are opposite each other; and

internal gears on an upper portion of the inner sidewall,

wherein the outer gears of the cap are coupled to the internal gears of the base to transfer torque from the thumbscrew to the cap and to the base and then to structures mounted on the PCB assembly.

2 . The reinforcement structure of claim 1 , wherein the cap further comprises:

a plurality of inner teeth extending downward from the bottom of the sidewall, the plurality of inner teeth configured to align with outer teeth of the thumbscrew to engage with the thumbscrew; and

a tab engaged with the hollow cylindrical body to slightly rotate the cap to engage the cap with the thumbscrew,

wherein the outer gears of the cap are aligned to engage with the internal gears of the base.

3 . The reinforcement structure of claim 2 , wherein the cap comprises a retaining ledge surrounding the bottom of the outer sidewall and extending perpendicularly from the bottom of the outer sidewall to protrude outward from the bottom of the outer sidewall, the retaining ledge configured to prevent the cap from being removed from the base.

4 . The reinforcement structure of claim 1 , wherein each of the first retaining tab and the second retaining tab comprises a flexible side portion and a lip extending from the flexible side portion toward the center of the inner hole of the base.

5 . The reinforcement structure of claim 4 , wherein the lips of the first retaining tab and the second retaining tab are configured to prevent the cap from falling through the inner hole of the base.

6 . The reinforcement structure of claim 4 , wherein each of the first retaining tab and the second retaining tab is configured to flex the respective flexible side portion outward to allow a user to remove the cap.

7 . The reinforcement structure of claim 1 , wherein the base comprises a first side flange extending from a first outer edge and a second side flange extending from a second outer edge.

8 . The reinforcement structure of claim 1 , wherein the base comprises supports near the two or more outer edges.

9 . The reinforcement structure of claim 1 , wherein the base comprises features disposed along the two or more outer edges configured to attach to structures mounted on the PCB assembly.

10 . A reinforcement structure for reinforcing a thumbscrew that fastens a PCB assembly to a metal carrier, the reinforcement structure comprising:

a base comprising:

a planar plate having two or more outer edges and an inner hole;

an inner sidewall extending from the inner hole downward perpendicularly from the planar plate;

internal gears on an upper portion of the inner sidewall;

features along the two or more outer edges configured to abut against structures of the PCB assembly;

a first side flange extending from a first outer edge of the two or more outer edges and a second side flange extending from a second outer edge of the two or more outer edges; and

a cap comprising:

a hollow cylindrical body having an outer sidewall;

a plurality of inner teeth extending downward from the bottom of the outer sidewall, the plurality of inner teeth configured to align with outer teeth of the thumbscrew to tighten the thumbscrew;

outer gears on the outer sidewall, wherein the outer gears of the cap are aligned to engage with the internal gears of the base to transfer a torque from the thumbscrew to the base through the cap and then to the structures mounted on the PCB assembly; and

a tab engaged with the hollow cylindrical body to slightly rotate the cap to engage the cap with the thumbscrew.

11 . The reinforcement structure of claim 10 , wherein the base comprises first and second retaining tabs on a lower portion of the inner sidewall, wherein the first retaining tab is placed opposite to the second retaining tab.

12 . The reinforcement structure of claim 11 , wherein each of the first retaining tab and the second retaining tab comprises a flexible side portion and a lip extending from the flexible side portion toward the center of the inner hole of the base.

13 . The reinforcement structure of claim 12 , wherein the lips of the first retaining tab and the second retaining tab are configured to prevent the cap from falling through the inner hole of the base.

14 . The reinforcement structure of claim 12 , wherein each of the first retaining tab and the second retaining tab is configured to flex the respective flexible side portion outward to allow a user to remove the cap.

15 . The reinforcement structure of claim 10 , wherein the base comprises supports near the two or more outer edges.

16 . The reinforcement structure of claim 10 , wherein the cap comprises a retaining ledge surrounding the bottom of the outer sidewall and extending perpendicularly from the bottom of the outer sidewall to protrude outward from the bottom of the outer sidewall, the retaining ledge configured to prevent the cap from being removed from the base.

17 . The reinforcement structure of claim 10 , wherein the cap comprises aluminum.

18 . The reinforcement structure of claim 10 , wherein the base comprises a plastic material.