| 摘要 |
A novel sheet holder either with or without a board. The sheet holder comprises a base angle plate and a holding angle plate, connected by extension springs for toggling said holding angle plate between a closed position for holding said sheet and an open position for removing said sheet. Two pegs and a rubber block with groove are installed for increasing the number of held sheets and more securely holding the mounted sheets. The present sheet holding board can be rotatably mounted to the back of a picture frame with locking feature. The sheet holder without board can be applied for holding advertisement sheet for indoor and outdoor display. Novel art hanging and control system will raise and lock the art for display, and lower it to a reachable level for display change. This art may include an art sheet, 3D art, or a computer monitor showing advertisement message. For outdoor display, a clear vinyl cover can be employed for holding an art sheet and protect it from UV radiation, rain and wind damage. A spring or weight load can be employed to maintain the art to be displayed in its uppermost position and leveled. Such spring and weight load can also be used in a flagpole for such benefit.
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