A protective cover mechanism includes a housing, a protective cover and a latching pole. The housing includes an opening defined therethrough. The protective cover is configured for covering the opening of the housing and includes a latching slot defined therethrough. The latching slot includes a first latching end and an opposite second latching end. The latching pole is integrally formed on the housing adjacent to the opening and is penetrated through the latching slot of the protective cover for slidably or rotatably assembling the protective cover to the housing. The latching pole is latchable to the first latching end or the second latching end of the latching slot to expose or cover the opening of the housing.