Pressure-changeable inflator capable of being fast switched

Abstract

The invention discloses a pressure-changeable inflator capable of being fast switched. According to the inflator, a movable air cylinder with a cylinder hole is provided with a rear end cover for forming a rear air chamber between the cylinder hole and the rear end cover, the rear end cover is provided with a pressure release hole communicating with the interior and the exterior of the rear air chamber, a switch valve capable of opening and closing the pressure release hole is arranged, and therefore when the pressure release hole is opened, second-section pressurization air supply of the rear air chamber can be eliminated, and the inflator can be applied in a common low-pressure inflation mode. The problems that the structure is complex, assembly consumes a lot of time and control is difficult can be solved.

Description

technical field [0001] The invention relates to an air pump, in particular to a variable pressure air pump that can be quickly switched to a high-pressure pumping mode or a general low-pressure pumping mode. Background technique [0002] The current commercially available bicycles can be roughly divided into road bikes, off-road bikes and mountain bikes. In order to reduce rolling resistance, the tires of road bikes will be injected with higher tire pressure (because the higher the tire pressure, the lower the rolling resistance). In order to absorb vibrations, off-road vehicles and mountain bikes must be injected with lower tire pressure (if the tire pressure is too high, the shock absorption effect will be lost), so the pump manufacturers on the market have developed switchable pumps. Inflators for high tire pressure (high pressure mode) and low tire pressure (low pressure mode). [0003] Commonly used variable pressure pumps are shown in Taiwan Patent No. 089222988 "Vari...

AI Technical Summary

Problems solved by technology

[0003] Commonly used variable pressure pumps are shown in Taiwan Patent No. 089222988 "Variable Pressure Pump", No. 089205218 "Variable Pressure Pump", No. 086207142 "Labor-saving and High Air Volume Pump" and other patents Generally, however, the structure of these prior patents is quite complicated, resulting in the inability to effectively reduce the processing cost, the assembly is very complicated, and the operation is not very convenient.

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