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The present invention is directed to a printed circuit board assembly having a circuit board with opposing side edges and an open frame housing with parallel mounting frames extending along the side edges of the circuit board. Each mounting frame has a body portion having a support shelf and an over

The present invention is directed to a printed circuit board assembly having a circuit board with opposing side edges and an open frame housing with parallel mounting frames extending along the side edges of the circuit board. Each mounting frame has a body portion having a support shelf and an overhang ledge forming a channel, the channel nesting an associated side edge of the circuit board. A mounting peg is supported to extend transversely to the entry of the channel, and temporary deforming of the ledge permits entry of the associated side edge into the channel, the circuit board having a complementary peg retention hole appropriately sized to receive the mounting peg.

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1. A printed circuit board assembly comprising: a circuit board having opposing side edges; and an open frame housing comprising parallel mounting frames extending along respective side edges, each mounting frame comprising:an elongated body member having a rigid support shelf and a flexible ledge f

1. A printed circuit board assembly comprising: a circuit board having opposing side edges; and an open frame housing comprising parallel mounting frames extending along respective side edges, each mounting frame comprising:an elongated body member having a rigid support shelf and a flexible ledge forming a channel, adapted to contactingly nest the associated side edge of the circuit board; anda mounting peg supported by the body member extending transversely to the entry of the channel wherein the ledge is adapted to be temporarily deformed during insertion of the side edge of the circuit board into the channel, the circuit board having a complementary peg retention hole appropriately sized to engage the mounting peg therein to retain the inserted side edge in the channel; andthe mounting peg has a cylindrical outer surface and an inclined end surface, the inclined end surface inclining toward a direction perpendicular to the entry of the channel. 2. The printed circuit board assembly of claim 1 wherein the mounting frame has retention holes and further comprising fastener means for mounting the open frame housing in a host system. 3. The printed circuit board assembly of claim 2 further comprising: a plurality of non-volatile memory chips mounted to at least one side of the circuit board; anda connector mounted to an end of the circuit board between the parallel mounting frames. 4. The printed circuit board assembly of claim 1 wherein the mounting pegs have a cross-sectional shape of a keyhole, and the peg retention holes in the circuit board have a complementary keyhole shape to receive the mounting pegs therein. 5. The printed circuit board assembly of claim 1 wherein the open frame housing is made of a polymeric material. 6. The printed circuit board assembly of claim 1 wherein the mounting pegs are integrally formed with the body member. 7. The printed circuit board assembly of claim 1 wherein the mounting pegs have a cylindrical outer surface, and the peg retention holes in the circuit board have a complementary circular shape to engage the mounting pegs therein. 8. The printed circuit board assembly of claim 1 wherein the mounting pegs have a dome shaped outer surface, and the peg retention holes in the circuit board have a complementary circular shape to engage the mounting pegs therein. 9. The printed circuit board assembly of claim 1 further comprising: a second mounting peg supported by the body member extending co-axially with the first mounting peg transversely to the entry of the channel wherein temporary deforming of the ledge permits entry of the associated side edge into the channel, the peg retention hole appropriately sized to engage the first and second mounting pegs therein. 10. The printed circuit board assembly of claim 1 wherein the mounting peg has a cylindrical outer surface and a curvilinearly shaped surface extending from the cylindrical outer surface. 11. A mounting apparatus for a printed circuit board having a side edge, comprising: a mounting frame having a body member having a rigid support shelf and a flexible ledge forming a channel contactingly nesting the side edge; and a mounting peg extending transversely to the entry of the channel wherein entry of the associated side edge into the channel temporarily deforms the ledge to facilitate passage of the associated side edge into the channel, the circuit board having a complementary peg retention hole appropriately sized to receive the mounting peg therein so that the associated side edge is retained in the channel; andthe mounting peg has a cylindrical outer surface and an inclined end surface, the inclined end surface inclining toward a direction perpendicular to the entry of the channel. 12. The mounting apparatus of claim 11 further comprising: fastener means for securing the mounting frame in a host system. 13. The mounting apparatus of claim 11 wherein the mounting peg has a cross-sectional shape of a keyhole, and the peg retention hole in the circuit board has a complementary keyhole shape to engage the mounting peg therein. 14. The mounting apparatus of claim 11 wherein the body member is made of a polymeric material. 15. The mounting apparatus of claim 11 wherein the mounting peg is integrally formed with the body member. 16. The mounting apparatus of claim 11 wherein the mounting peg has a cylindrical portion, and the peg retention hole in the printed circuit board has a complementary circular shape to engage the mounting peg therein. 17. The mounting apparatus of claim 11 wherein the mounting peg has an overlapping lip and extends from the support shelf, and wherein the ledge is rotatable toward the mounting peg to a peg engaged mode and away from the mounting peg to a peg disengaged mode, the ledge having a ledge hole axially aligned with the mounting peg in the peg engaged mode, and wherein the mounting peg is extendible through the peg retention hole, the lip configured to pass through the ledge hole as the ledge is moved to the peg engaged mode and the lip resisting retraction of the mounting peg from the ledge hole when the ledge is rotated to the peg disengaged mode. 18. An apparatus comprising: a planar circuit board having a component support surface supporting an electrical component, first and second side edges and a peg retention hole extending into the component support surface; and a mounting frame comprising an elongated body member having a rigid support shelf, a flexible ledge, and a stationary retention peg, the support shelf and ledge forming a channel along an overall length of the body member, the stationary retention peg disposed within the channel and extending from the support shelf in a direction toward the ledge, the ledge deflectable responsive to passage of the selected side edge into the channel to facilitate insertion of the stationary retention peg into the peg retention hole to affix the mounting frame to the circuit board; and the mounting peg has a cylindrical outer surface and an inclined end surface, the inclined end surface inclining toward a direction perpendicular to the entry of the channel. 19. The apparatus of claim 18, in which the mounting frame is a first mounting frame affixed to the first side edge of the circuit board, and the apparatus comprises a second mounting frame nominally identical to the first mounting frame affixed to the second side edge of the circuit board. 20. The apparatus of claim 18, in which the stationary mounting peg is a first mounting peg and the mounting frame further comprises a second mounting peg affixed to the ledge in facing relation to the first mounting peg, the second mounting peg deflected during deflection of the ledge to facilitate insertion of the second mounting peg into the peg retention hole. 21. The apparatus of claim 18, in which the mounting peg has a cylindrical outer surface and an inclined end surface, the inclined end surface in facing relation to the ledge.