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A simplified circuit card package permits easier, faster assembly and reduces lost motion during contact wipe when the card package is subjected to actuation of a zero insertion force connector.
English (United States)
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Circuit Card Retention Device
A simplified circuit card package permits easier, faster assembly and reduces
lost motion during contact wipe when the card package is subjected to actuation
of a zero insertion force connector.
In Fig. 1, molded circuit card frame 1 has biasing leaf spring 2 with aperture 3
mounted on its top by sliding the apertured end of the spring left under bridge 4
across recess 5 over ramped post 6, allowing the aperture to settle over the post
for retention. Backstop 7 limits leftward motion of spring 2. Card frame 1 also
carries spring-biased latch 8 with thumb release 9 in housing 10.
Card frame 1 is inserted downward in guide frame 11, as seen in Fig. 2, until
latch 8 engages shoulder 12 of the frame. Leaf spring 2 is urged against stop 13
and tends to raise the card package, holding latch 8 at its upper limit against
shoulder 12. When a zero insertion force connector (not shown) is actuated to
wipe against the circuit tabs of the card, latch 8 prevents further upward card
motion to assure a full wiping motion and reliable contact.