Protective cover structure

1. A protective cover structure comprising:

a protective cover that is fitted to an assembly work opening disposed in a wall of a case in which electric components are accommodated, thereby closing the opening; and

a fitting detecting connector that detects that the protective cover is fitted to the assembly work opening,

wherein the fitting detecting connector includes a receptacle connector which is fixed to an interior of the case and an insertion/extraction connector which is disposed on the protective cover in a mutually insertable/extractable manner while being opposed to the receptacle connector,

the receptacle connector includes a first tubular housing and fitting detecting conductors in the first tubular housing, and

the insertion/extraction connector holds a pair of detecting electrodes which are electrically conductible with the fitting detecting conductors, and is molded integrally with the protective cover,

wherein the first tubular housing extends into the assembly work opening and projects outwardly from the case in a direction toward the protective cover when fitted to the assembly work opening,

wherein the insertion/extraction connector includes a second tubular housing in which the pair of detecting electrodes are held by a hood portion that is disposed by partitioning a tubular housing space in a longitudinal direction and a pair of detecting terminals connected to the pair of detecting electrodes and drawn out from the hood portion are accommodated, and

the second tubular housing of the insertion/extraction connector is formed so that a signal wire connector which is detachably connected to the pair of detecting terminals covers a front end of the second tubular housing.

2. The protective cover structure according to claim 1 , wherein the second tubular housing projects from the rear face of the protective cover in a fitting direction between the protective cover and the assembly work opening.