Air pump with improved air tightness

Abstract

The invention discloses an air pump with improved air tightness. The air pump comprises an upper cover provided with an exhaust nozzle, a gasket, human-head-shaped exhaust one-way valves, a flow distribution device and a piston assembly, wherein the gasket is provided with a first air inlet channel and a first air outlet channel, the gasket is matched with the bottom end of the upper cover in a sealed mode, an air inlet cavity and an air outlet cavity are formed between the gasket and the upper cover, the air inlet cavity and the air outlet cavity are spaced, the first air inlet channel corresponds to the air inlet cavity, the first air outlet channel corresponds to the air outlet cavity, the air outlet cavity is communicated with the exhaust nozzle of the upper cover, the human-head-shaped exhaust one-way valves are integrally connected with the lower surface of the first air outlet channel of the gasket, and the heights of top faces of the human-head-shaped exhaust one-way valves gradually reduce from inside to outside. By the adoption of the structure, the situation that the human head portions of the human-head-shaped exhaust one-way valves tilt and deform due to the fact that compression amounts of edges of the gasket are not uniform or are exceedingly large is avoided, the situation that the human head portions of the human-head-shaped exhaust one-way valves tilt and deform due to elastic fatigue after the human-head-shaped exhaust one-way valves move many times, and accordingly the air tightness of the air pump is greatly improved.

Description

technical field [0001] The invention relates to an air pump, in particular to an air pump with improved airtightness. Background technique [0002] Air pumps have been widely used in medical and health, instrumentation, automobile, chemical, scientific research and other industries for pumping, inflating, vacuuming, pressurizing, gas circulation, gas sampling and other purposes. The air pumps in the prior art generally use a motor to drive a connecting rod mechanism to pull or compress the piston, and then cooperate with a one-way flow distribution device for air in and out to realize air suction and exhaust. At present, in the air pumps of the prior art, the one-way flow distribution device of the air inlet and outlet is generally used to seal the gasket with the upper cover with the exhaust pipe in an ultrasonic way, and separate the air inlet and outlet chambers, and then adopt the shape of a human head to exhaust the air. The one-way valve realizes the air outlet distri...

AI Technical Summary

Problems solved by technology

Since the gasket and the upper cover are sealed and connected by the ultrasonic method, when the welding amount of each part of the ultrasonic wave is uneven, it is easy to cause the compression amount of each side of the gasket to be inconsistent, so that the head-shaped exhaust check valve is prone to occur. warping deformation

In addition, because the head-shaped exhaust check valve in the prior art is generally a planar structure, the head-shaped exhaust check valve is also prone to elastic fatigue after repeated movements, causing the head to warp and deform, eventually causing the head to deform. The airtightness of the exhaust one-way valve is poor, which reduces the airtightness of the air pump

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