A billboard for the roof of a 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] The specific embodiment: the billboard among the present invention is installed on the roof of the taxi. When the taxi is not running, 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, the triangular driving lever 53 is in contact with the inclined plane 61 of a limit block 54, At this time, the advertisements on both sides of the triangular billboard 4 face the outside world for publicity. The second centrifugal wheel 21 does not rotate, and the friction wheel 25 is in friction fit 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 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 running at ...
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