| 摘要 |
PURPOSE: An upper plate folding structure is provided to secure a wide space and to improve the availability of space. CONSTITUTION: An upper plate folding structure comprises a bracket(20) which supports the bottom surface of an upper plate, a guide body which is rotationally connected to the bracket by a rotary shaft, a first fixing groove which is installed in the lower part of a vertical long groove, a second fixing groove which is formed on the upper side, a guide pin which is inserted into or separated from a first fixing groove or a second fixing groove, a combination loop and lever(50) which is elastically supported by a return spring, a shield plate(70) which is formed with a guide groove, a shield plate guide unit having a guide protrusion, and a cover.
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