Casing for receiving an extractible hard drive and including a rocking cam for extracting said hard drive

A casing including a housing for receiving an extractable element and an extractor member mounted in the vicinity of the housing, wherein the extractor member comprises a tilting cam having a bearing end extending into the housing and an actuation end co-operating with a slidable lever having a drivable first end and a second end provided with a recess having the actuation end of the cam passing therethrough, the actuation end of the tilting cam including a rear edge provided with an indentation having a depth extending along a sliding direction of the lever, and resilient return means holding said rear edge pressed against a rear end of the recess so that the rear end of the recess drops into the indentation at the end of insertion of the extractable element, thereby emitting a sound, wherein the resilient return means is configured to urge the tilting cam to eject the extractable element.