An internal pressurized air pump

Abstract

The invention discloses an inner pressure-boosting inflator which comprises an outer pipe, an inner pipe, a push rod and an air discharging device. An opening of the outer pipe is upwards, two ends of the inner pipe are provided with openings, the lower end of the inner pipe extends into the outer pipe, the upper end of the inner pipe is connected with the air discharging device, one end of the push rod is fixedly connected to the bottom of the outer pipe, and the other end of the push rod extends into the openings of the inner pipe. The inner pressure-boosting inflator is characterized in that an air inlet is arranged between the top end of the outer pipe and an outer wall of the inner pipe, a multifunctional piston is arranged at the position of the opening located at the lower end of the inner pipe, an outer ring of the multifunctional piston is contacted with an inner wall of the outer pipe, an inner ring of the multifunctional piston is contacted with an outer wall of the push rod, and a high-pressure piston is arranged at the top of one end of the push rod extending into the inner pipe and is contacted with an inner wall of the inner pipe. The inner pressure-boosting inflator is simple in structure and good in sealing performance and inflation effect.

Description

technical field [0001] The invention relates to the field of air pumps, in particular to an internal pressurized air pump. Background technique [0002] Conventional mini pumps currently on the market are constrained by their structures. Usually, the effective length h of the inner tube of a conventional mini pump is 11cm to 15cm, and the diameter of the inner tube is 1.8cm to 2.3cm. The normal thrust of a general pump is 10kgf~15kgf, according to P=F / S, the normal air pressure output by a conventional mini pump at one time is about 0.2MPa~0.6MPa, and the air volume V is about 28cm3~62cm3. [0003] In order to overcome the deficiencies of traditional mini pumps, many people of insight have successively appeared on the market various mini pumps that meet people's daily needs, such as double-tube pumps, two-way intake pumps, high-pressure pumps, high-low pressure adjustable pumps, etc. pump. But above-mentioned all kinds of air pumps all do not have supercharging function. ...

AI Technical Summary

Problems solved by technology

[0005] If the air volume is large, the inner diameter of the trachea of ​​the pump must be enlarged. At this time, the effect of high air pressure and light hand feeling cannot be achieved;

[0006] In order to ensure that the air pressure is high, the inner diameter of the trachea of ​​the pump must be reduced, and the effect of sufficient air volume cannot be achieved at this time;

[0007] In order to ensure a light feel, the inner diameter of the trachea of ​​the pump must also be reduced. At this time, it is also impossible to achieve the effect of sufficient air volume.

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