Yazaki Corporation

Masahiro Kanamaru

Makoto Nakayama

Tarou Inoue

Katsuya Hashimoto

Taro Inoue

A lock mechanism includes: a lock arm provided in a cantilever manner on an inner wall of a part compartment of a box body of an electric connection box; and a lock projection provided to the lock arm on its surface facing a part housed in the part compartment. The lock arm can be divided in a longitudinal direction into: a base end region fixed to the inner wall; upper end region located in the free end which interferes with the part and receives a pressing force for unlocking operation; and a middle region located within a predetermined distance range between the base and upper end region. The flexural rigidity of the base and upper end region is set larger than that of the middle region by providing ribs on the base and upper end region and providing no ribs on the middle region.

Lock mechanism of electric connection box

In an upper surface of a bottom wall of a box body having a part accommodation room formed inside, a recess is provided. In the bottom of the recess, a bolt hole to fix an electrical junction box to a vehicle body is penetrated. In the upper surface of the bottom wall of the body hole, a flat sealing surface is formed to surround an opening of the recess. When an electronic unit is accommodated in the part accommodation room, the bottom surface of the electronic unit is brought into close contact with the sealing surface to close the recess, thus providing a seal between the part accommodation room and recess.

Sealing structure of electrical junction box

An electrical junction box includes a box body provided with a first groove; an attachment bracket provided with a second groove; and a lower cover provided attached to the bottom surface of the box body. When the attachment bracket is properly mounted on the box body, the first and second grooves are arranged to form a single continuous third groove. A protrusion is provided on the lower cover and fits to the third groove.

Electrical junction box

In a sidewall of a connector frame, a cantilevered lock arm is provided. A lower end of the lock arm is connected to the sidewall with a curved supporting unit interposed therebetween. The lock arm extends upward from the supporting unit with a space. The supporting unit has a slit to increase the flexibility of the lock arm. An engagement protrusion is provided on the lock arm. Moreover, a fitting sidewall is provided in a box body, and a lock wall having a lock protrusion is provided outside the fitting sidewall. The lock protrusion includes a downward-facing engagement surface. A mold hole used in molding the engagement surface is formed between the fitting sidewall and lock wall. An abutment surface is provided at an upper end of the fitting sidewall and contacted with the supporting unit to close communication between the mold hole and the slit.

Lock mechanism

A wire harness leading-out opening is provided at a junction between an electric connection box and a bottom surface cover which constitute an electric connection box. A cylindrical wire harness leading-out guide is provided on the periphery of the wire harness leading-out opening, and is formed in a way that the both circumferential ends of a half-cylindrical body formed on the electric connection box and a half-cylindrical body formed on the bottom surface cover are coupled to each other. In the inner circumference of a circumferential junction between the peripheral walls of the two half-cylindrical bodies, a concave portion is provided to accommodate a loose portion of an armoring member wrapped around the outer circumference of the wire harness.

Wire harness leading-out port structure of electric connection box

An electrical junction box is provided to reduce looseness of a cover. The electrical junction box includes a box body and the cover to be slidably mounted on a lateral side of the box body from above. The cover has a front wall and a pair of left and right sidewalls connected to both left and right ends of the front wall to overlap with left and right connecting walls of the box body, providing a U-shaped cross section. The electrical junction box further includes first slide guides provided on both of the cover and the box body and second slide guides provided on both of the cover and the box body. The second slide guides are positioned in areas where the left and right sidewalls of the cover overlapping with the left and right connecting walls of the box body. Further, the second slide guides are closer to the front wall of the cover being mounted to the box body than the first slide guides.

Electrical junction box and assembling method thereof

An electrical junction box includes an accommodation box having an accommodation box body having an accommodation space penetrating trough the accommodation box body up and down and an electrical component mounting block inserted into the accommodation space from either upside thereof or the underside and fixed in the accommodation space. The electrical junction box fiber includes a first locking mechanism arranged between an inner wall of the accommodation box body and an outer wall of a block body to lock up the electrical component mounting block inserted into the accommodation space from its upside and a second locking mechanism arranged between the inner wall of the accommodation box body and the outer wall of the block body to lock up the electrical component mounting block inserted into the accommodation space from the underside.

Electrical component mounting block and electrical junction box

An electrical junction box facilitates a worker's wiring of a wire harness without using a superfluous component and allows the workability in assembling the electrical junction box as well as that in disassembling to be improved. The electrical junction box includes a box body and a cover to be mounted to the box body after wiring wire harnesses about the box body. The box body has wiring grooves shaped to have U-shaped cross sections and arranged on its exterior surface to accommodate the wire harnesses, which have been drawn out of the box body through its one side and further led from an upper part of the one side downwardly. Left and right sidewalls defining each groove are provided, at their leading ends, with temporary locking parts restricting slipping of the wire harness out of the wiring groove. The cover is provided with restricting walls (sidewalls, rib) restricting outward deflection of the left and right sidewalls. In mounting the cover to the box body, the restricting walls are inserted to the outside of the sidewalls and between the adjoining sidewalls. The restricting walls have withstanding parts formed to prevent the temporary locking parts from being deflected outside.

Provided is a structure for housing an electrical junction box in a housing box by inserting the electrical junction box into the housing box from above and also for fixing the electrical junction box to the housing box so as to prevent slipping-off thereof by engagement between engagement parts provided on external side surfaces of the electrical junction box and engagement parts provided on internal side surfaces of the housing box, both of which face each other in parallel with an insertion direction in insertion of the electrical junction box. Moreover, groove-like depressions extended along the insertion direction into the housing box are provided in the external side surfaces of the electrical junction box, and engagement convex parts are provided in the depressions. Furthermore, engagement projections engaged with the engagement convex parts are provided on the internal side surfaces of the housing box. As depressions behind the engagement convex parts in the insertion direction, die-releasing holes for injection molding for forming locking parts of the electrical junction box are used.

Structure for housing electrical junction box in housing box

A lock structure for a box includes a first box member having a retaining projection, and a second box member having an elastic retaining arm. The retaining arm has at its distal end a retaining portion for engagement with the retaining projection. The first box member has an arm restraint rib which restricts a releasing movement of the retaining arm in a condition in which the retaining arm and the retaining projection are engaged with each other. When the arm restraint rib is pressed by the elastic retaining arm, the arm restraint rib is deformed by a pressing force of the elastic retaining arm. A retaining distance of the retaining projection relative to the retaining portion of the elastic retaining arm is larger than a gap between the elastic retaining arm and the arm restraint rib in the engaged condition.

Lock structure for box

In a wire harness leading-out structure in which a harness notch groove is formed in a case body, and a water stop cover is slidingly inserted into the harness notch groove, and a wire harness outlet port for the passage of a wire harness therethrough is formed by that portion of the harness notch groove which is not closed by the water stop cover, a plurality of the harness outlet ports are formed by that portion of the harness notch groove which is not closed by the water stop cover, and the plurality of harness outlet ports are arranged at two different heights, respectively.

Wire harness leading-out structure

The interior of a case body is partitioned into two chambers by a partition wall, and the two chambers communicate with each other via a communication passage defined by a notch formed in the partition wall. First and second covers are attached to the case body, and cover open sides of the two chambers, respectively. The first and second covers have lap portions, respectively, which cover an open end of the communication passage in overlapping relation to each other.

Electric connection box

In an electric connection box, first connectors of wire harnesses and second connectors of wire harnesses are received within a case body, and the first connectors are coupled respectively with the second connectors, and the pairs of coupled connectors are fixed to the case body. Slide rail portions are formed on an inner surface of a wall of the case body, and a connector holding plate is slidably mounted on the slide rail portions, and has a plurality of connector fixing portions spaced from each other in a direction of sliding of the connector holding plate. The plurality of pairs of coupled connectors are fixed to the plurality of connector fixing portions, respectively, and the connector holding plate is slid along the slide rail portions, and is inserted into the case body, thereby fixing the plurality of pairs of coupled connectors to the case body.

Growing community of inventors

Shizuoka-ken, Japan

Masahiro Kanamaru