Electronic Control Unit

Abstract

An electronic control unit includes a metallic control block in which a plurality of control equipments are installed, a metallic cover member, and an electronic control mechanism. The metallic cover member is fitted onto the metallic control block. The electronic control mechanism is retained between the metallic control block and the metallic cover member to drive the control equipments. An electrically conducting section is constituted by an electrically connecting member which electrically conducts the metallic cover member to the metallic control block via a bus bar constituent.

What is claimed is: 
     
         1 . An electronic control unit, comprising:
 a metallic control block in which a plurality of control equipments are installed;   a metallic cover member fitted onto the metallic control block; and   an electronic control mechanism retained between the metallic control block and the metallic cover member to drive the control equipments, the electronic control mechanism including: a bus bar constituent made of a resin material and having a power electronic circuit to drive the control equipments; and a print board to control the drive of the control equipments via the bus bar constituent, the print board on which a plurality of electronic parts are mounted being fixed onto the bus bar constituent by means of a metallic fixture section and an electrically conducting section being disposed to electrically conduct the metallic control block to the metallic cover member to provide the same electric potential for both of the metallic cover member and the metallic control block, wherein the electrically conducting section is constituted by an electrically connecting member which electrically conducts the metallic cover member to the metallic control block via the bus bar constituent.   
     
     
         2 . The electronic control unit as claimed in  claim 1 , wherein the electrically connecting member is an earth connecting member extended between the metallic control block and the cover member, the earth connecting member including an elastic deformation section whose length between both ends of the elastic deformation section is changeable and which is located on at least either one of both ends of the earth connecting member in an elongated direction of the earth connection member. 
     
     
         3 . The electronic control unit as claimed in  claim 1 , wherein a penetrating hole through which the earth connecting member is penetrated is formed on the bus bar constituent and retaining sections which are elastically retained on a hole edge of the penetrating hole are disposed on a predetermined position of the earth connecting member in the elongated direction of the earth connecting member. 
     
     
         4 . The electronic control unit as claimed in  claim 2 , wherein the earth connecting member is formed in a rectangular plate shape and the elastic deformation section of the earth connecting member is bent to form a curve. 
     
     
         5 . The electronic control unit as claimed in  claim 3 , wherein the retaining sections comprise: a plate-formed base section formed at a center of the earth connecting member; and a pair of retaining pieces disposed in parallel to each other at both sides of the base section and which are elastically deformable toward mutually inner directions, retaining grooves which retains on the hole edge of the penetrating hole being formed on an outer edge of each of the retaining pieces. 
     
     
         6 . The electronic control unit as claimed in  claim 2 , wherein the elastic deformation section is formed on each of both ends of the earth connecting member.