Abstract: An electrical junction box comprising a case having a rib; a wiring board assembly provided in the case and comprised of an insulating board and a plurality of bus bars mounted on the insulating board, the bus bars being sandwiched between the insulating board and the rib of the case; and a drainage channel provided near the bus bars. The drainage channel comprises a cutout of the rib formed at a portion bridging the adjacent bus bars. With this structure, the water having entered the case is prevented from staying in this portion, so that it may smoothly flow through the cutout of the rib to the outside of the case. Accordingly, the generation of short circuits between the adjacent bus bars may be prevented. At least a through-hole may be formed through the insulating board at a position near the bus bars, and a gap may be defined between the bus bars and the insulating board by providing a plurality of projections on the insulating board.

Abstract: A wiring apparatus for automobiles includes option-circuit blocks having optional circuits which are specific to certain models and classes of automobiles. The option-circuit blocks have a first group of connectors adapted for mating with a second group of connectors on a basic block which also includes a third group of connectors. The basic-circuit block and the option-circuit blocks are accommodated in a housing in which terminal connectors are placed to be matingly connected with the third group of connectors. The basic-circuit block is secured to the housing and both mechanical and electrical connections between the option-circuit block and the basic-circuit block are simultaneously established as the basic-circuit block is secured to the housing.

Abstract: A wiring connection apparatus is disclosed in which an electric connection box connected to connectors of terminals of wire harnesses is housed and fixed in a protecting cover. A reception seat for fixing the electric connection box by means of a screw is fixed to the protecting cover. A lock unit is provided between the reception seat and the connectors of the terminals of the wire harnesses so that the electric connection box and the connectors may be simultaneously connected to each other when the electric connection box is fixed to the reception seat by the screw.

Abstract: In an electric connection box containing a wiring board such as a bus bar circuit board and a surface cover set on the top of the wiring board and assembled inside the box body, the inside bottom surface of the box body is inclined to an angle that allows the downward flow of water droplets, spacers are projectingly installed upwardly on the inclined surface, and a spacing provided between the bus bar circuit formed in the lower surface of the wiring board in contact with the spacers and the inside bottom surface of the box body is greater than the height of the water droplets.

Abstract: A wire harness coupling unit intended for use on a vehicular instrument panel to facilitate coupling of connectors of a wire harness on the instrument panel with corresponding connectors of a wire harness on the dashboard side. The wire harness coupling unit essentially includes: a male coupler member provided on one of the dashboard and instrument panel and carrying connectors of one of the wire harnesses in predetermined positions; a female coupler member provided on the other one of the dashboard and instrument panel in face-to-face relation with the male coupler member and carrying connectors of the other one of the first and second wire harnesses in predetermined positions; the male and female coupler members being engageable with each other upon assembling the instrument panel onto the dashboard to couple the connectors of the two wire harnesses with each other.

Abstract: An external connection structure of an electric connection box includes a male or a female multi-connector housing formed integral with electric connection box and connected to an internal wiring of this electric connection box, and is constituted of a through connector joined to an external wire bundle and provided with a space large enough to hold the connector housing. The other male or female multi-connector housing is joined to the above-mentioned multi-connector housing integrated with the through connector housings connected to the external wire bundle.

Abstract: A junction block is composed of an upper casing accommodating a bus bar distribution board and a lower casing forming an integral connector housing for accommodating a mating connector. The bus bar has integral tabs extending rectangularly to the bus bar and into the connector housing through respective holes formed in the bottom wall of the connector housing. There is provided a deflecting barrier member in the shape of an elongate rectangular bar adjacent an opening which has necessarily been formed in the bottom wall of the connector housing as finished by plastic moulding. In case any water or water drops should creep into the connector housing via the opening in its bottom wall, they are prevented from reaching the tab base zone by the deflecting barrier member which serves to conduct creeping water or water drops downwardly or in the discharge direction. Hence, it will be avoided to cause short circuits or leakage currents to occur between the adjoining bus bars or terminals of the connector.

Abstract: An electrical connecting box having improved water discharging properties. The connecting box includes a box body and a bus bar circuit board. The bus bar circuit board is sloped to defined a sloped surface having a predefined angle of inclination from a horizontal plane. This may be done either by mounting the box body at an inclined angle, or by inclining the bus bar circuit board with respect to the box body. A water discharge hole is formed in a bottom plate of the box body.

Abstract: A protection cover for a wiring distribution box in which rising walls are continuously or discontinuously formed around a label bonding position.

Abstract: A watertight and leak-proof junction box for use, for example, in vehicles such as automobiles, and a process of assembling such a junction box are provided. The wiring board assembly comprising a plurality of insulating plates, wiring conductors strips and electric contacts formed by raising the free ends of the strips so as to project from the outer surface of the wiring plate pile which is embedded in an insulating resin through molding to form a resin-embedded wiring board assembly prior to assembling the junction box, and then the resin-embedded wiring board assembly joined with a connector support board having connector bodies for receiving the terminals of electrical units and/or wire harnesses is contained in a watertight case.

Abstract: A sealing material receiving structure in a junction block for use on a vehicle or the like is provided. The junction block comprises a top cover provided with a connector or connectors, or a wiring board; a bottom cover provided with a connector or connectors, or a wiring board; an insulating plate or plates provided with bus bars having tab terminals, and placed between the top and bottom covers; and an elastic plate-shaped packing placed between the lowermost insulating plate and the bottom cover. Rectangular enclosures are formed integrally with the packing so as to surround holes for receiving the tab terminals formed in the packing. Holes for receiving the enclosures therein, respectively, are formed in the bottom cover.

Abstract: An ultra multi-pole connector includes a plurality of small size multi-pole connectors each having a connector housing which has a plurality of terminals connected to a plurality of wires therein and engagement shoulders projecting from the upper portion of the connector housing, and a casing having a plurality of hollow sections to which said small size multi-pole connectors are mounted, respectively, and each of said hollow section having an engagement members, thereby the small size multi-pole connectors can be displaceably mounted in the hollow sections by engagement of the engagement shoulders and the engagement members.

Abstract: Disclosed herein is a mating type electric connector box structure comprising a pair of first and second electric connector box members arranged in opposed relation with each other with a partition board having a through-hole interposed therebetween, a plurality of conductor members provided on an opposed surface of said first electric connector box member, said conductor members being adapted to be electrically connected to a desired internal circuit incorporated therein, and a plurality of conductor receiving members provided on an opposed surface of said second electric connector box member, said conductor receiving members being adapted to be electrically connected to a desired internal circuit incorporated therein and being adapted to mate said conductor members, wherein when said first and second electric connector box members are fixed to said partition board, said conductor members are electrically connected with said conductor receiving members.