Advertising board for car roof of taxi
A technology for billboards and taxis, which is applied in the field of billboards and can solve problems such as the increase in the number of slogans
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[0083] DETAILED DESCRIPTION: The billboard in the present invention is installed on the roof of a taxi. When the taxi is not driving, the blade 9 does not drive the first ring sleeve 16 to rotate, the first rotating shaft 48 does not rotate, the scroll spring 52 is in a natural state, and the triangular shift lever 53 is in contact with the slope 61 of a limit block 54. At this time, the advertisements on both sides of the triangular billboard 4 face the outside world. The second centrifugal wheel 21 is not rotating, and the friction wheel 25 frictionally fits with the rear cone end of the first cone-shaped friction wheel 29.
[0084] Setting: When the taxi is running, the blade 9 is blown by the wind to drive the first ring sleeve 16 to rotate clockwise; when the speed of the taxi reaches 30km / h, the first centrifugal wheel 18 just cannot be driven by the centrifugal block 33 The second rotating shaft 19 rotates.
[0085] When the taxi is traveling slowly, the blade 9 is blown b...
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