| 摘要 |
A circuit board support rack (10) for vibratory testing of printed circuit boards includes a frame (11), a board engagement platform (29) thereon, a board retention member (39) spaced from the engagement platform. The rack ha s a first adjustment mechanism (47), e.g., rows of vertically-spaced apertures (49, 51, 53, 55) to receive a shoulder screw (61) to thread to the retention member. Such mechanism coacts with the frame and retention member, thereby permitting selection of the spacing between the engagement platform and boar d retention member. The rack has a second adjustment mechanism (63), e.g., screws (65) threaded to the retention member, each having notched locating p in (67). The second adjustment mechanism is mounted for locating-pin movement with respect to the engagement platform. The first adjustment mechanism permits configuring the rack for the approximate vertical height of the boar ds and the second adjustment mechanism permits secure edge clamping of each boa rd as it is loaded for testing.
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