A cabinet forming a showcase is provided and includes at least one glass door fastened on a ferrule moving along a rail, and a latch housed in the structure of the cabinet. When the door is in a locking position, the bolt of the latch is engageable in a notch formed in the ferrule or in an endpiece mounted at the end of said ferrule. This notch-includes an internally chamfered wall with a rake angle to prevent the bolt from returning to the retracted position under the effect of movement transmitted via the door as a result of residual slack between the ferrule and the rail.