| 摘要 |
A display sign having a frame with a jointed hinge which allows the two display boards to be rotated 360 degrees to double the usable display area, the display boards can be removed and replaced, providing an unlimited array of sign combinations. The frames are opened via geared hinges until retainer straps are fully extended, this allows display boards to be viewed in an upright position, a strap socket is removed from a strap pivot post, and one frame is rotated approximately 360 degrees via a geared hinge. The retainer straps are then reattached to strap pivot posts, additional stability can be obtained by replacing end caps with ballast holders and ballast rods, alternately, the device can be mounted firmly atop a car via suction cups.
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