An apparatus comprising: a housing ; a tray connected to the housing in a movable manner, the tray having a retracted closed position and an ejected open position with respect to the housing ; an ejector configured to eject the tray to the ejected open position; a push member having a first position and a second position, wherein the push member is in the first position as the tray is in the retracted closed position, the push member being configured to receive an external force for moving the push member into the second position and to operate the ejector to eject the tray to the ejected open position in response to the push member being moved to the second position, and the push member is further configured to stay in the second position upon removal of the external force; and a switch movable into a first electric position and a second electric position, the switch further comprising a first electric contact element and a second electric contact element ; characterized in that the first electric contact element is configured to be moved into contact with the second electric contact element upon application of the external force to the first electric contact element and before the external force is applied to the push member , and the push member is configured to receive the external force, and in response to the push member being moved to the second position, the push member is configured to maintain the switch in the first electric position and cause the ejection of the tray to the ejected open position; and wherein, in response to the tray being returned to the retracted closed position, the push member is configured to cause the switch to switch to the second electric position. a housing ; a tray connected to the housing in a movable manner, the tray having a retracted closed position and an ejected open position with respect to the housing ; an ejector configured to eject the tray to the ejected open position; a push member having a first position and a second position, wherein the push member is in the first position as the tray is in the retracted closed position, the push member being configured to receive an external force for moving the push member into the second position and to operate the ejector to eject the tray to the ejected open position in response to the push member being moved to the second position, and the push member is further configured to stay in the second position upon removal of the external force; and a switch movable into a first electric position and a second electric position, the switch further comprising a first electric contact element and a second electric contact element ; characterized in that the first electric contact element is configured to be moved into contact with the second electric contact element upon application of the external force to the first electric contact element and before the external force is applied to the push member , and the push member is configured to receive the external force, and in response to the push member being moved to the second position, the push member is configured to maintain the switch in the first electric position and cause the ejection of the tray to the ejected open position; and wherein, in response to the tray being returned to the retracted closed position, the push member is configured to cause the switch to switch to the second electric position. <EOS>