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There is a problem we usually encounter that mutual interference between electrical plugs make some socketaperture won't be able to use when we put a electrical plug which is irregular in shape or too large in size on power socket.This inspired me to design such a retractable combination socket-- the entire strip consists of four jack blocks with the two blocks in middle able to be freely telescopic along the track groove to the left and right. when the plug is too big, we can pull the jack blocks on both sides out to a certain distance so that large plugs can be put in as the space between the four socketaperture increases.
China Agricultural University
Beijing city, China