Can prevent bicycle seat assembly that exposes to sun and rain

The utility model discloses a can prevent bicycle seat assembly that exposes to sun and rain, including saddle and automatic folding umbrella, automatic folding umbrella includes the telescopic umbrella pole, folding automation struts the umbrella stand and fixes the umbrella cloth on strutting the umbrella stand automatically, the lower extreme of telescopic umbrella pole is provided with and isused for the automatic kayser that struts the umbrella stand of locking, the fixed connecting rod that is provided with on the kayser, characteristics are the fixed boxes that are provided with in thebelow of saddle, the back position that leans on of saddle is provided with the through -hole that the umbrella after can supplying to fold passed, the lower extreme of telescopic umbrella pole passes the through -hole and stretches into in the box, be provided with kayser control mechanism in the box, the advantage is when needing use the umbrella, through kayser control mechanism with regard tosteerable automatic foldin