Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Futoshi Nishida

Manabu Hashikura

Tatsuya Shimizu

Tsuyoshi Hosokawa

Shigeki Yamane

Tadashi Tomikawa

Tomoki Kano

An electric connection box according to the present invention can include a circuit board having a first surface capable of mounting an electronic component, and a second surface defining a non-mounting surface, a case housing the circuit board, the circuit board oriented in a substantially vertical direction, a vertical inner wall surface of the case formed opposite the non-mounting surface of said circuit board, the vertical inner wall and the non-mounting surface of said circuit board defining a substantially vertical air ventilation path, a suction port positioned in the case and in communication with the ventilation path, an exhaust port positioned in the case above said suction port and in communication with the ventilation path, and a heat generating component in communication with the ventilation path.

Electric connection box

It is an object to effectively reduce minute clearances generated between a heat radiating member and a vehicle body and ensure good cooling performance while avoiding the occurrence of impact and noise caused by the vibration of a vehicle. A circuit unit U is mounted such that an outer surfaceB of the heat radiating memberto which the circuit bodyis fixed faces a body surface S of the vehicle with a clearance. Preferably, the mounting partfixed to the body of the vehicle is extended, the surfaceof the mounting partwhich is in contact with the body is positioned to be substantially parallel to the outer surfaceB of the heat radiating member and a step is provided in both surfacesB. In a mounted state, the body and the outer surfaceB of the heat radiating member are facing each other in a substantially parallel state and a clearance is formed between the body and the outer surface of the heat radiating member over the entire area excluding the mounting part

Mounting structure of on-vehicle circuit unit and on-vehicle circuit unit

There is provided a circuit structure in which a control circuit is formed on the upper surface of an insulating plateby control busbars, and a power circuit is formed on the lower surface of the insulating plateby power busbars. By this configuration, the circuit structure can be made small in size as compared with the case where the control circuit and the power circuit are formed on separate circuit boards. Also, the insulating plateis formed with an opening, and a power busbaris positioned over the opening. In the opening, a terminalB of a relayis positioned, and is connected to the power busbar. Thereby, the connecting work process can be simplified as compared with the case where the power circuit and the terminalB of the relayare connected to each other, for example, by a jumper wire.

Circuit structure that connects an electronic part to a conducting path

An electric connection box according to one aspect of the present invention can include conductive members on a circuit board, a case accommodating the circuit board, a ventilation path formed in the case and through which air can flow in a vertical direction, a suction port formed in the case to be in communication with the ventilation path, an exhaust port formed in the case to be in communication with the ventilation path, the exhaust port positioned above the suction port, cooled portions positioned on the conductive members and positioned in the ventilation path so as to allow air to flow in the vertical direction between conductive members, and heat generating components connected to the cooled portions of the conductive members.

One aspect of the present invention can include an electric connection box having a circuit board, a case inside of which said circuit board is housed, a plurality of fitting depressions capable of being fitted with an external electrical component, positioned on a side wall of the case opposing a board surface of the circuit board. Further, an air path inside of said case is defined by the plurality of fitting depressions positioned as an arrayed side by side with a spacing in between, and the air path circulates the air up and down between the plurality of fitting depressions, and an inlet positioned in the case and in communication with the air path, an exhaust outlet is positioned in the case in communication with the air path and positioned above said inlet, and a heat generating component is positioned in the air path.

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Yokkaichi, Japan

Futoshi Nishida