US 12,132,302 B2
Circuit assembly
Yusuke Isaji, Mie (JP); and Hitoshi Takeda, Mie (JP)
Assigned to AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/758,750
Filed by AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jan. 12, 2021, PCT No. PCT/JP2021/000626
§ 371(c)(1), (2) Date Jul. 13, 2022,
PCT Pub. No. WO2021/153206, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 2020-014099 (JP), filed on Jan. 30, 2020.
Prior Publication US 2023/0039051 A1, Feb. 9, 2023
Int. Cl. H02G 3/16 (2006.01); B60R 16/023 (2006.01); H01H 50/04 (2006.01); H02G 3/08 (2006.01); H05K 7/02 (2006.01)
CPC H02G 3/16 (2013.01) [B60R 16/0238 (2013.01); H01H 50/047 (2013.01); H02G 3/081 (2013.01); H05K 7/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A circuit assembly comprising:
a lower case for accommodating lower circuit components;
an upper case covering the lower case;
upper circuit components attached onto an upper wall of the upper case; and
a fastening member holder for holding a fastening member for fixing the upper circuit components to the upper wall of the upper case, the fastening member holder being provided in the upper wall of the upper case and opening upward,
wherein the fastening member holder is a recessed portion that is recessed from an upper face of the upper wall facing upward so as to have a bottom,
the fastening member includes a first fastening part and a second fastening part,
the first fastening part is entirely accommodated in the fastening member holder, and the second fastening part is fastened to the first fastening part accommodated in the fastening member holder and is entirely provided above the bottom of the recessed portion,
the upper circuit components include a heat-generating component and an upper current-carrying bus bar,
the lower circuit components include a heat-dissipating bus bar,
the upper current-carrying bus bar and the heat-dissipating bus bar are connected to a connecting portion of the heat-generating component, such that the heat dissipating bus bar contacts the connecting portion of the heat-generating component, and the upper current-carrying bus bar contacts the heat-dissipating bus bar, and
an end portion of the heat-dissipating bus bar is arranged in an extending manner below the fastening member holder that fixes the upper current-carrying bus bar.