Patent ID: 7572154

Claim:
A joint connector comprising: at least, first second and third sub-housings that can be built up in a plurality of levels along a build-up direction; and projecting pieces projecting from the sub-housings in a direction intersecting the build-up direction, each projecting piece having opposite first and second mating surfaces facing in the build-up direction, at least one identifying projection provided on each of the first mating surfaces and identifying recesses provided on each of the second mating surfaces, the identifying projection on the first sub-housing being configured differently from the identifying projection on the second sub-housing, the identifying recess on the second sub-housing being configured to receive the identifying projection on the first sub-housing, the identifying recess on the third sub-housing being configured differently from the identifying recess on the second sub-housing, the identifying recess on the third sub-housing further being configured so that the identifying projection of the second sub-housing can be inserted therein while the identifying projection of the first sub-housing interferes with opening edges of the identifying recess in the third sub-housing for preventing insertion, so that the identifying recesses receive the identifying projections only if the sub-housings are built up in a specified order.