Universal press-fit connection for printed circuit boards
View Patent ↗A universal press-fit connection allows a component having a connector pin to be connected to a compatible plated through hole of a circuit board regardless of circuit board thickness. The connector pin includes a proximate end adjacent the component, a distal end with a fork lock, and a compliant portion between the proximate and distal ends. A multi-width through hole includes a first portion partially extending through the circuit board and a second, wider portion extending beyond the first portion. The fork lock initially moves radially inward upon insertion into the first portion via flexing of the compliant portion, and re-expands when entering the second portion. The compliant portion engages the through hole and the fork lock secures the connector pin in the through hole.
1. A printed circuit board assembly, comprising:
an electronic component with a connector pin having a proximate end at a component body, a distal end with a fork lock, and a compliant portion between the proximate and distal ends;
a circuit board having a multi-width through-hole for receiving the connector pin of the electronic component, the multi-width through hole including a first portion that is narrower than the fork lock and partially extends from a first surface of the circuit board to a depth less than a distance of the fork lock from the connector body and a second portion that extends to a depth beyond the first portion and is wider than the first portion; and
an internal shoulder in the circuit board that tapers outwardly from the first portion to the second portion of the through hole; and
a tapered portion on the fork lock having a profile matching the tapered internal shoulder of the through hole, such that the tapered portion of the fork lock seats against the tapered shoulder of the through hole when the fork lock is moved beyond the narrower first portion and into the wider second portion of the through-hole.
2. The printed circuit board assembly of claim 1 , further comprising:
an electrically conductive plating covering the first and second portions of the through hole.
3. The printed circuit board assembly of claim 1 , wherein the compliant portion of the connector pin comprises opposing legs that are inwardly flexible.
4. The printed circuit board assembly of claim 3 , wherein the fork lock comprises outwardly-extending fork members coupled to the legs, such that the fork members move with the flexing of the legs.
5. The printed circuit board assembly of claim 1 , wherein the compliant portion of the connector pin comprises an eyelet defined by surrounding connector pin material that flexes inwardly.
6. The printed circuit board assembly of claim 1 , further comprising:
another circuit board having a thickness of less than a distance of the fork lock from the connector body, and having a uniform-width through hole wherein a width of the compliant portion of the connector pin is wider than the uniform-width through hole.