| 摘要 |
A sun-blind rotation structure of an LED(Light Emitting Diode) electric signboard is provided to minimize the effect of sun rays by rotating a blind correspondently to the movement of the sun. In a sun-blind rotating device, a vertical rotary rod(40) is composed of plural pinions(41) installed at a cylindrical rod and a rotation operating unit protruded outward at the lower part of an LED board(10). The vertical rotary rod is vertically disposed at one side of a space part between the LED board and a rear panel, and turned by the operation of the rotation operating unit. A sun blind member(30) comprises a horizontal rotating rod(31) extended to the LED board at one end of the center portion of the sun blind member; a pinion(32) formed at the horizontal rotating rod at the spot where the horizontal rotating rod and a horizontal transfer member(50) cross each other at right angle; and a reinforcing member(33) formed in the rear panel and pivot-combined with the horizontal rotating rod so that the end of the horizontal rotating rod is fitted and rotated inside. Plural horizontal transfer members having a square section comprise a first rack unit(51) engaged with the pinion of the vertical rotary rod and horizontally moved and a second rack unit(52) engaged with the pinion of the horizontal rotating rod and horizontally moved. The horizontal transfer member changes the rotation of the vertical rotary rod into a horizontal direction between the LED board and the rear panel. The horizontal transfer member turns the sun blind member to the left or right by rotating the pinion of the sun blind member. Plural press members(53) are protruded inward in the rear panel to push the upper part of the horizontal transfer member toward the pinion of the sun blind member.
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