FIG. 10 illustrates a prior art wiring harness retainer clip (Japanese Utility Model Preliminary Publication No. Hei-1 96723) with a living hinge 104. Living hinge 104 interconnects two semi-cylindrical clip pieces 100 and 102 and bends when the clip is opened and closed. After repeated openings and closings, living hinge 104 may fatigue and break, resulting in a loss of wire retention properties. However, this clip has the advantage of being a single piece. Thus, only one part is maintained in inventory and only a single mold is required. Moreover, use of the clip requires no assembly of separate clip pieces.
FIG. 11 discloses a two-piece hinge 201 for a junction box. The hinge pivots as two cover pieces 200 and 202 are opened and closed. This assembly is more fully described in U.S. Pat. No. 4,967,924 issued Nov. 6, 1990 to Murofushi et al. A rod 204 pivotally engages a rod holder 208 creating a hinge mechanism. This type of hinge is strong and maintains good retention properties after repeated openings and closings. However, this assembly requires two separate pieces 200 and 202 which, in turn, require two separate molds and an inventory of separate parts.