Yazaki Corporation

Noriyoshi Yamazaki

Tomohiro Sugiura

Akinori Nakashima

Minoru Umezaki

Hideki Kawamura

Hiroki Shiraiwa

Yasuhito Suzuki

Kazuomi Kiyosue

To achieve efficient heat spreading and heat releasing by using a metal core of a circuit board, a terminal block includes an insulating block body and terminals. At least one of the terminals is provided with terminal portions for a connection with a circuit board. The terminal portions are inserted into respective through holes of the circuit board, the circuit board having a pattern circuit at a surface layer thereof and a conductive metal core at an intermediate portion in a thickness direction, so that heat of the metal core or of both the metal core and the pattern circuit is absorbed and transferred to the terminals. A bus-bar block includes an insulating block body and several parallel bus-bars with different lengths. Terminal portions at a tip end of the bus-bars are inserted, near heat-generating component on the circuit board, into the through holes of the circuit board.

Circuit board structure having measures against heat

The present invention provides a junction block adapted adaptable for a variety of vehicles without increase of cost. The junction block includes a circuit board, a terminal blockfor low-grade use to be connected to the circuit board, a bus bar blocksuperimposed on the terminal block and connected to the circuit board, a coverfor covering the circuit board from side of the bus bar block, and a plurality of fuses' to be connected to terminalsof the terminal block and the bus bar block, wherein the junction block is adaptable for a variety of vehicles with or without use of the bus bar block.

Junction block

Bus bars each having on one side a terminal portion for connection of an electrical component and on the other side a terminal portion for connection of circuit board are provided in an insulating block body parallel to each other to constitute a busbar block. The bus bars are prevented from uplifting by virtue of a rib integral with the block body. Recessed portions for positioning are provided in an insulating cover corresponding to the ribs, and at the same time as the busbar block is attached to the cover, the ribs are brought into engagement with the recessed portions to provide positioning of the busbar block. Terminal block constructed by terminals each having on one end thereof a terminal portion for connection of an electrical component and on the other side thereof a terminal portion for connection of circuit board, and an insulating block body holding the terminals.

Busbar-block mounting structure

A plate-like terminal mounting structure is configured to attach a plurality of plate-like terminals in multiple tiers to a terminal holder for facilitated and effective positioning of the terminals in the terminal holder and prevention of undesirable impacts of the terminals upon a connection between the terminals and a circuit board. The terminal holder includes a plurality of ribs tapering toward their tips and parallel to each other. The terminal includes a recessed portions or holes for engaging the plate-like terminals with the ribs in a regular mounting position without gap left therebetween. The rib includes sloping surfaces on its four sides (front, rear, right, and left sides). The terminal holder includes a partition wall separating the terminals from each other, the partition wall being in one piece with the ribs. The plate-like terminals are arranged in multiple tiers in a height direction of the ribs. The recessed portion or the hole of the terminal in a lower tier is large, and the recessed portion or the hole of the terminal in the upper tier is small depending on tapering of the ribs.

Growing community of inventors

Shizuoka, Japan

Noriyoshi Yamazaki