Powered width expansion of articulated bed deck

A bed comprising

• an articulated bed deck configured to support an occupant, the articulated bed deck including a first deck section and a second deck section, the first deck section being pivotable relative to the second deck section, the first deck section including a first fixed width portion and a first wing movably coupled to the first fixed width portion, the second deck section including a second fixed width portion, and a second wing movably coupled to the second fixed width portion,
• a motor coupled to the first deck section and operable to extend and retract the first wing relative to the first fixed width portion, the first wing being coupled to the second wing so that operation of the motor to extend and retract the first wing relative to the first fixed width portion also extends and retracts, respectively, the second wing relative to the second fixed width portion,
• a lead screw coupled to the motor and a release unit coupled to the first wing and configured to move between:
• a) an engaged position in which the release unit engages the lead screw and moves therealong as the leadscrew is rotated by the motor thereby causing the wing to translate relative to the first fixed width portion;
• and b) a disengaged position in which the release unit is disengaged from the leadscrew, and
• a lock having a locked state in which the lock resists movement of the release unit and an unlocked state in which the lock does not resist movement of the release unit.