| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixing structure of an instrument unit capable of properly and stably maintaining a fixing force without depending upon the lapse of time and an installation environment, and capable of improving reliability.SOLUTION: The fixing structure includes: a cylindrical engagement part 53 which has a locking claw 55 circumferentially split into a plurality of portions at the tip and locks the edge of a mounting hole 13 formed at a circuit board 12 and positioned at the rear face side of the circuit board 12 by inserting the front end into the mounting hole 13; a boss 63 expanding the locking claw 55 outward in the diametrical direction by being pressed into an engagement hole 52b surrounded by the locking claw 55 of the cylindrical engagement part 53; and movement regulating parts 54a, 64 for regulating movement in the opposite direction to such a direction as to press the boss 63 pressed into the engagement hole 52b into the engagement hole 52b. |
