Patent ID: 6718627
Filing Date: 2004-04-13
Classification: H05K,Y10T

Abstract:
A back-up plate up/down apparatus for supporting a printed circuit board comprising:a base plate; a plurality of guide blocks installed on the base plate; at least one first driving means installed between the guide blocks; a plurality of fixing blocks installed on the base plate, wherein a rotating shaft is installed between each respective pair of the fixing blocks; a plurality of rotating links, wherein a first end of each rotating link is coupled to a respective rotating shaft; a plurality of connecting members and wherein a second end of each rotating link is coupled to a respective connecting member; a second driving means comprising an extendable rod, wherein the extendable rod is connected to one of the connecting members; a plurality of holders coupled to respective ones of the connecting members and configured to hold a back-up plate; and a plurality of sensors configured to sense movement of a backup plate held by the holders.