Toolless alignment, retention, connection, termination and testing on printed circuit boards

Abstract

Embodiments of the present invention provide a system for testing and mounting a PCB in a device. A PCB may be placed on one or more standoffs so that a head portion of the standoff protrudes from one or more apertures of the PCB. A push-pin type standoff cap may then be placed on the protruding heads to mechanically restrain the PCB to the standoffs. Furthermore, one or more cables may be coupled with the standoff caps to provide power or test signals to one or more connector pads on the PCB. Therefore, the standoff caps provide a system for aligning, retaining, connecting, terminating, and testing printed circuit boards.

1 . A mounting device for mounting a printed circuit board (PCB), comprising:
 a standoff comprising a body and a securing element disposed in and protruding from the body, wherein the body forms a PCB resting surface at an interface of the securing element and the body and wherein the securing element is configured to be registered with and disposed through an aperture formed in the PCB; and   a standoff cap comprising a hollow sleeve configured to axially receive the securing element and mechanically restrain the PCB against the PCB resting surface of the standoff, wherein an inner surface of the hollow sleeve and an outer surface of the securing element define a locking interface to resist relative axial movement.   
   
   
       2 . The mounting device of  claim 1 , wherein the standoff cap is press-fitted into the securing element. 
   
   
       3 . The mounting device of  claim 1 , wherein the securing element is a threaded member. 
   
   
       4 . The mounting device of  claim 1 , wherein the standoff cap is tethered to the standoff. 
   
   
       5 . The mounting device of  claim 1 , further comprising a gasket placed between the PCB and the standoff cap. 
   
   
       6 . The mounting device of  claim 1 , wherein the standoff cap comprises one or more electrically conductive elements configured to electrically connect to one or more connector pads formed on the PCB thereby defining one or more signal paths between the standoff cap and the PCB. 
   
   
       7 . The mounting device of  claim 1 , wherein the standoff cap comprises a plurality of electrically conductive elements configured to electrically connect to respective connector pads formed on the PCB thereby defining one or more discrete signal paths between the standoff cap and the PCB for different signals. 
   
   
       8 . The mounting device of  claim 7 , wherein the standoff cap comprises a slot configured to register with a protruding key formed on the PCB to lock the standoff cap in a predetermined position and prevent the standoff cap from rotating. 
   
   
       9 . A device, comprising:
 a plurality of standoffs connected to one of a device chassis and a device component, the standoffs each comprising a body and a securing element disposed in and protruding from the body, wherein the body forms a PCB resting surface at an interface of the securing element and the body;   a printed circuit board (PCB) disposed on the respective PCB resting surface of the standoffs and wherein the PCB defines a plurality of apertures each having a respective one of the securing elements of the standoffs disposed therethrough; and   a plurality of standoff caps, each comprising a hollow sleeve disposed on a portion of the securing element protruding from a respective aperture and mechanically restrain the PCB against the standoff, wherein the standoff caps are color coded, each color identifying a function of the standoff caps.   
   
   
       10 . The device of  claim 9 , wherein the standoff cap comprises a plurality of electrically conductive elements configured to electrically connect to respective connector pads formed on the PCB thereby defining one or more discrete signal paths between the standoff cap and the PCB for different signals. 
   
   
       11 . The device of  claim 9 , the functions comprise:
 supplying power to the PCB;   probing the PCB;   supplying one or more test signals to the PCB; and   securing the PCB.   
   
   
       12 . The device of  claim 9 , wherein the securing element is a threaded member. 
   
   
       13 . The device of  claim 9 , wherein the standoff caps are tethered to respective standoffs. 
   
   
       14 . The device of  claim 9 , wherein one or more standoffs comprise a slot configured to register with a protruding key formed on the PCB to lock the standoff cap in a predetermined position and prevent the standoff cap from rotating 
   
   
       15 . The device of  claim 9 , further comprising one or more gaskets placed between the PCB and a respective standoff.