Patent ID: 7521953

Claim:
A test apparatus of a printed circuit board, comprising: a bottom seat; a lower plate coupled operably onto said bottom seat, and having an upper surface formed with a plurality of first probes; a lower spacer disc coupled operably to said lower plate, and having a plurality of first openings respectively aligned with said first probes of said lower plate; an upper plate disposed above said lower space lower disc, coupled operably onto said bottom seat, and having a lower surface formed with a plurality of second probes; an upper spacer disc disposed below said upper plate, and having a plurality of second openings respectively aligned with said second probes of said upper plate; and a two-step driving mechanism for moving said lower plate, said lower spacer disc, said upper plate and said upper spacer disc relative to one another in two-step manner; wherein, once the printed circuit board under test is disposed on said lower space disc, activation of said driving mechanism in a first step results in relative movement between said lower and upper spacer discs, thereby sandwiching and retaining the printed circuit board between said lower and upper spacer discs, and activation of said driving mechanism in a second step results in relative movement between said lower and upper plates so as to sandwich said lower and upper spacer discs between said lower and upper plates such that said probes of said lower and upper plates extend respectively through said openings in said lower and upper spacer discs to engage two opposite side surfaces of the printed circuit board.