PROBLEM TO BE SOLVED: To provide a power conversion device that can reduce force to be applied between a flange portion of a nut and a resin.SOLUTION: A DCDC converter includes a first substrate, a second substrate, and a base member. A terminal board 30 is provided to the base member. The terminal board 30 includes a resin 31, a flange nut 41, a cap 51, and a bus bar 61. The flange portion 43 of the flange nut 41 is covered with the resin 31. The bus bar 61 is plate-shaped, has a circular first insertion hole 62 at one end portion thereof, and has a circular second insertion hole 63 at the other end portion opposite to the one end portion. In addition, the bus bar 61 has a plate-like conductive portion 64 between the first insertion hole 62 and the second insertion hole 63.SELECTED DRAWING: Figure 5

Power conversion device

PROBLEM TO BE SOLVED: To prevent a bus bar from floating up from a resin member when tightening a bolt.SOLUTION: A bus bar 20 is provided with a claw 24 which is formed on a terminal 22 and protrudes downward from the left, when viewing the front face of a body part 26 from the front, of the terminal 22. A resin member 30 is provided with a detent part 34 which is formed on a pedestal part 32 and locks the claw 24 of the terminal 22. Consequently, the bus bar 20 can be prevented from rotating when a bolt 42 is tightened. The resin member 30 has a groove 36 which is formed on a backrest part 35 and into which the body part 26 of the bus bar 20 is fitted. The resin member 30 further has a sandwiching part 39 which is formed on the lateral side of the backrest part 35 and sandwiches an extension part 28 of the bus bar 20 from its front face and rear face. Thus, when the bolt 42 is tightened, the movement of the extension part 28 forming the bus bar 20 integrally with the body part 26 may be restricted by the sandwiching part 39 even if force acts on the body part 26 of the bus bar 20 in front or other direction where the body part 26 is disengaged from the groove 36.

Attachment structure of bus bar

PROBLEM TO BE SOLVED: To provide an assembly structure of a terminal board which has excellent workability during assembling of the terminal board.SOLUTION: An assembly structure of a terminal board includes: a case side assembly 30 on which an electronic apparatus is mounted; an integrated terminal board 20 assembled into the case side assembly 30 from above; and a U phase bus bar 26U. The case side assembly 30 has a terminal part 51 and a guide part 40 located adjacent to the terminal part 51. A bottom surface 22d, placed on the case side assembly 30, is formed in the integrated terminal board 20. The U phase bus bar 26U extends from the integrated terminal board 20 and connects with the terminal part 51. The integrated terminal board 20 has a rib like part 28 protruding from the bottom surface 22d. The protruding length of the rib like part 28 is larger than the overlapping length between the guide part 40 and the U phase bus bar 26U in the height direction.

Assembly structure of terminal board

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Attachment structure of bus bar

Assembly structure of terminal board