Patent ID: 8289681

Claim:
A control unit comprising: a plurality of controllers that are disposed side by side so that the controllers are in contact with each other or are near each other, each of the controllers comprising: an upper common bus bar; a lower common bus bar; a left bus bar holder disposed on a left side of said upper common bus bar and said lower common bus bar; a right bus bar holder disposed on a right side of said upper common bus bar and said lower common bus bar; an upper rotating bus bar; and a lower rotating bus bar, wherein said upper common bus bar has a groove formed on an upper surface and a groove formed a lower surface along a left and right longwise direction, said lower common bus bar has a groove formed on an upper surface and a groove formed a lower surface along the left and right longwise direction, said left bus bar holder and said right bus bar holder tighten and secure said upper common bus bar and said lower common bus bar, each of said left bus bar holder and said right bus bar holder has protrusions respectively coming into said groove and forming a gap along the front-back and widthwise direction of said upper common bus bar and said lower common bus bar, said upper rotating bus bar comes in contact with an end of said upper common bus bar in one side in a freely rotating manner, and is tightened and secured to said left bus bar holder or said right bus bar holder that is in said one side as well as said upper common bus bar, and said lower rotating bus bar comes in contact with an end of said lower common bus bar in one side in a freely rotating manner, and is tightened and secured to said left bus bar holder or said right bus bar holder that is in said one side as well as said lower common bus bar.