ELECTRONIC CHARGING SHELF SYSTEM

A cassette shelf mechanism includes a mounting plate; a trolley equipped with rollers mounted on the mounting plate, allowing movement in an up-down direction; a rotary hinge attached to the trolley, including a lower part; a pivot hinge including an upper part connected to a shelf plate; and an extension tensioning module mounted on the mounting plate, which includes a cable connected to the trolley to facilitate the movement in the up-down direction, wherein the shelf plate is configured to unfold from a closed to an open position by rotating the upper part of the rotary hinge relative to the lower part.