Electric junction box
First Claim
1. An electric junction box comprising:
- a circuit including a control circuit board and a bus bar, said control circuit board having conductive circuits formed in and electronic components mounted on a first one of front and rear surfaces thereof and said bus bar provided on a second one of the front and rear surfaces of said control circuit board;
a heat sink provided on said bus bar on a surface opposite to the surface facing said control circuit board through an insulating layer, said heat sink including a planar member including thermal diffusion portions having one of convex and concave shapes on a surface opposite to the surface contacting said bus bar; and
a case containing said circuit and said heat sink.
1 Assignment
0 Petitions
Accused Products
Abstract
A heat sink in an electric junction box has thermal diffusion portions having one of convex and concave shapes on the surface. The structure enlarges a surface area of the heat sink compared to a configuration in which a surface has no concavity or convexity, thereby allowing fast heat dissipation from the surface of the heat sink to the exterior of the junction box. Further, the heat sink has the thermal diffusion portions on the entire plate surface. The structure enlarges the surface area of the heat sink compared to a configuration in which the thermal diffusion portions are provided to only a portion of the surface, thereby further enhancing the heat dissipation.
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Citations
20 Claims
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1. An electric junction box comprising:
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a circuit including a control circuit board and a bus bar, said control circuit board having conductive circuits formed in and electronic components mounted on a first one of front and rear surfaces thereof and said bus bar provided on a second one of the front and rear surfaces of said control circuit board;
a heat sink provided on said bus bar on a surface opposite to the surface facing said control circuit board through an insulating layer, said heat sink including a planar member including thermal diffusion portions having one of convex and concave shapes on a surface opposite to the surface contacting said bus bar; and
a case containing said circuit and said heat sink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A heat sink for a circuit including a control circuit board having conductive circuits formed in and electronic components mounted on a first one of front and rear surfaces thereof and a bus bar provided on a second one of the front and rear surfaces of said control circuit board, said heat sink provided on the bus bar on a surface opposite to the surface facing the control circuit board through an insulating layer, said heat sink comprising:
a planar member including thermal diffusion-portions having one of convex and concave shapes on a surface opposite to the surface contacting the bus bar. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A heat sink for a circuit including a control circuit board having conductive circuits formed in and electronic components mounted on a first one of front and rear surfaces thereof and a bus bar provided on a second one of the front and rear surfaces of said control circuit board, said heat sink provided on the bus bar on a surface opposite to the surface facing the control circuit board through an insulating layer, said heat sink comprising:
a planar member including thermal diffusion portions having a substantially planar shape and projecting from a surface opposite to the surface contacting the bus bar.
Specification