Automatic aeration device of bicycle

The utility model discloses a bicycle autoinflation device, including a wobbler mounted on the bicycle axletree. Housing washer of the one side of the wobbler is provided with a sliding flute. The tyre gas nipple is connected with the gas cartridge fixed on the rim. In the gas cartridge is provided with an inflation piston which is connected with the handspike protruding the gas cartridge. Tother end of the handspike is connected with the jib mounted in the sliding flute. The wobbler together with the gas cartridge synchronously rotated with the wheel owing to the effect of the handspike of the gas cartridge on the wobbler, when the utility model is in normal use; when it need to charge, pinch together the control handle on the thill, then the handle control the wobbler to stop rotating with the wheel via the brake cable, thereby the gas cartridge is fixed on the wheel, and the jib on the handspike of the gas cartridge is moved in the sliding flute of the wobbler, which makes the handspike performance a to-and-fro beeline motion to start charging. The device could charge the tyre in ridden row at any moment; with properties of swift inflation; saving time, saving labour, saving tyre, depressed use-cost of bicycle, and buoyancy in ridden; the utility model has simple structure, compact volume, low cost, usableness, and flexibility.