To provide a prevention structure of missing a lock which can judge a locked state without depending on a lever position.
A lock mechanism 19 for fixing a console main body 12 to a base 11 is composed of an operation lever 31 pivoted on a bracket 18, a second hook 32 pivoted on the operation lever 31 and a second striker 33, projected on the upper surface of the base 11, by which the second hook 32 is engaged/disengaged. Thereby, when the operation lever 31 is turned to a lock position, the lock mechanism is constituted so that the engagingly locking position of the second hook 32 at the engagingly locking state in which the second hook 32 is engagingly locked with the second striker 33 is different from the non-engagingly locking position C of the second hook 32 at the non-engagingly locking state in which the second hook 32 is come off from the second striker 33. A cover 51 is provided attachably/detachably on the console main body 12. A detection rib 52, contacted to the second hook 32 on the non-engagingly locking position C, by which the cover 51 can not be installed at the non- engagingly locking state is projected on the cover 51.
IDE HIROYUKI
SUZUKI WATARU
