| 摘要 |
PURPOSE:To prevent an increase in a processing process from being caused by an earth of a wiring board to a case body and to obtain reliably the earth of the wiring board to the case body. CONSTITUTION:When a wiring board 22 is screwed and fixed on bosses 27 on a case body 23 by a screw 25, an earth plate 24 is used. Terminal holes 22d and 22e are held formed in the board 22 in a symmetrical state to each other to an insertion hole 22c for the screw 25. In correspondence to this, the plate 24 has an annular part 24a having an insertion hole 243, in which the screw 25 is inserted, and terminal pieces 24b and 24c to correspond to the holes 22d and 22e and is molded integrally with the annular part 24 and the pieces 24b and 24c by a sheet metal working or the like. When the plate 24 is mounted on the board 22, guide parts 24h and 24i of the pieces 24b and 24c go being inserted in the holes 22d and 22e and engaging parts 24f and 24g are smoothly inserted in the holes 22d and 22e. When the plate 24 is finished mounting, the parts 24f and 24g are engaged with the holes 22d and 22e and the board 22 is prevented from slipping off from the case body 23. |
