CIRCUIT ASSEMBLY AND ELECTRIC JUNCTION BOX

• US 20170079129A1
• Filed: 05/11/2015
• Published: 03/16/2017
• Est. Priority Date: 05/23/2014
• Status: Active Grant

• Current Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
• Original Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
• Inventors: Chin, Tou
• Granted Patent: US 10,117,322 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 16/02 electric constitutive elements
• CPC Class Codes: H02G 3/16 structurally associated with support for line-connecting terminals within the box
• CPC Class Codes: H05K 1/0204 using means for thermal conduction connection in the thickness direction of the substrate H05K1/0207 takes precedence
• CPC Class Codes: H05K 1/0209 External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 2201/0382 Continuously deformed conductors
• CPC Class Codes: H05K 2201/066 Heatsink mounted on the surface of the PCB heatsink inserted in the PCB H05K2201/10416
• CPC Class Codes: H05K 2201/10272 Busbars, i.e. thick metal bars mounted on the PCB as high-current conductors metal strips H05K2201/1028
• CPC Class Codes: H05K 2201/10409 Screws
• CPC Class Codes: H05K 3/0064 onto a polymeric substrate
• CPC Class Codes: H05K 7/20854 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20863 takes precedence

Abstract

Provided is a circuit assembly including a heatsink, an insulating sheet that is placed on the heatsink, and a circuit boarder that is placed on the heatsink via the insulating sheet. The circuit board is fixed to the heatsink by screwing, and a heat conductive member is arranged between insulating sheet and the circuit board.

Claims

1. A circuit assembly comprising:

a heatsink;

an insulating sheet that is placed on the heatsink; and

a circuit board that is placed on the heatsink via the insulating sheet,

wherein the circuit board is fixed to the heatsink by a fixing member, and

a heat conductive member is arranged between the insulating sheet and the circuit board.

2. The circuit assembly according to claim 1,

wherein an electronic component is mounted on a surface of the circuit board that faces away from a side on which the heatsink is arranged, and

the heat conductive member is provided in a region that corresponds to a region of the circuit board on which the electronic component is mounted.

3. The circuit assembly according to claim 2,

wherein the region of the circuit board on which the electronic component is mounted is provided between one and another of lead terminals of the electronic component.

4. An electric junction box in which the circuit assembly according to claim 1 accommodated in a case.

5. An electric junction box in which the circuit assembly according to claim 2 is accommodated in a case.

6. An electric junction box in which the circuit assembly according to claim 3 is accommodated in a case.