AN EXTENDABLE COVER DEVICE

摘要

An extendable cover device comprises at least one secondary board provided in a hollow cover board. An outlet for the secondary board is provided at one side of the cover board. the secondary board can be pulled out of the cover board to form an extended cover board and also can be pushed into the cover board. Another cover device according to another solution of this invention comprises at least one secondary board hinged at one side of a cover board. The secondary board can be turned through 180° between a folding position and an extending positon. At the folding position the secondary board is on a recess surface of the cover board. At the extending position the secondary board forms an extended cover board.