Sumitomo Wiring Systems, Limited

Tooru Nakagawa

Yukinori Saka

Yoshito Oka

Tatsuo Suzuki

Kazuhiro Yamamoto

An electric junction box for a vehicle is assembled by fitting and locking a connector through an aperture provided in a main case; the aperture being used for fitting the connector that holds a retainer at a temporary latch location, the retainer providing a double latch for a terminal; inserting and latching the terminal of an electric wire into the connector; and pushing the retainer into a full latch position. A recess for retainer operation is provided at a location facing the retainer and on a surrounding wall of the main case that surrounds the aperture.

Electric junction box for a vehicle

An obliquely bent spring tab is projected from a circumference of a bolt hole in a power connector of a bus bar. When the bus bar is housed in and fixed to a case, the spring tab is in stable surface contact with a bolt. Thereby, conductivity inspection can be performed by connecting a conductivity inspection apparatus to the bolt.

Spring tab of an electric junction box

Upper and lower casings () are coupled together and are fixed to a holder () by a bolt (B). The upper casing () has an upper wall () with a bolt hole () and the lower casing () has a bottom wall () with a bolt hole (). A cylindrical collar () is molded with the bottom wall () of the lower casing () and projects from the edge of the bolt hole (). The collar () has a length to penetrate through the bolt hole () in the upper wall () of the upper casing (). The collar () has a step () for supporting a lower surface of a bolt head (Bb) of the bolt (B) and inward projection () for engaging an upper surface of the bolt head (Bb). Thus, the bolt head (Bb) is held rotatably between the step () and the inward projection ().

Automotive electrical connection box

In a structure for attaching a circuit board terminal to a circuit board, stress is minimized in a soldered portion on a circuit section upon inserting and drawing an electrical element into and from the circuit board. The attaching structure including a holding member mounted on and secured to a circuit board, a bus bar that has a base portion supported on the holding member and a leg portion that passes one or more through-holes and to be soldered on a circuit section, and a circuit board terminal that has a base portion to be connected to the bus bar and a connection portion adapted to be coupled to a terminal of an electrical element. The bus bar is provided on the base portion with elastic tongue pieces that can contact elastically with a circuit board terminal. The circuit board terminal is connected through the bus bar to the circuit section.

Structure for attaching a terminal to a circuit board

An automotive electrical connection box () has a casing main body () fastened to a holder () by a bolt (B). A mating connector () is mounted in the casing main body () and is connected with a waiting-side connector () in the holder () simultaneously with the fastening by the bolt (B). A dummy housing () projects from the casing main body () at a side of the bolt (B) opposite the mating connector (), and an opening () is provided at a portion of the holder () corresponding to the dummy housing (). The dummy housing () and the opening () engage and create a stress to balance a stress created upon connecting the waiting-side connector () and the mating connector ().

Automotive electrical connection box and method of assembling thereof

An electrical connection box has upper and lower casings () for accommodating circuitry. A surrounding wall () of the upper casing () fits inside a surrounding wall () of the lower casing (). Engaging locking claws () project from the outer surface of the surrounding wall () of the upper casing () and from the inner surface of the surrounding wall () of the lower casing (). An upper wall of the upper casing () is inclined down from a center portion to three peripheral edges. A drainage path () is defined by a clearance between the surrounding walls () of the upper and lower casings (). A bottom wall of the lower casing () has drainage holes () at the bottom end of the drainage path ().

Automotive electrical connection box and a method of mounting it

Upper and lower casings () have the surrounding walls coupled together. A bolt (B) is mounted beforehand in the casings (), and projects through a bolt hole () in the lower casing () to fix the casings () to a holder (). A first bush () is fixed in the lower casing () and a second bush () is interlocked with an outer circumferential surface of the first bush (). The bolt (B) passes through the bushes () so that a lower surface of the bolt head (Ba) engages the upper end surface of the first bush (). On the other hand, an inward-projection is formed on an upper part of the second bush (), and contacts the upper surface of the bolt head (Ba). Thus, the bolt head (Ba) is held rotatably between the upper end surface of the first bush () and the inward-projection.

Growing community of inventors

Yokkaichi, Japan

Tooru Nakagawa