Pressure regulator of electric air pump

Abstract

The invention relates to a pressure regulator of an electric air pump. The pressure regulator is characterized by comprising a base plate, a flexible sealing fin, a moving plate, a base with an inner cavity, an adjusting screw, a knob with an inner gear ring and a trigger switch, wherein the base plate is provided with a chamber with an open upper part; an air inlet nozzle is arranged on the sidewall of the base plate; the flexible sealing fin is arranged on the upper end face of the base plate and covers the opening at the upper end of the chamber; the moving plate is laid on the flexible sealing fin; the base with the inner cavity is fixed on the upper end face of the base plate; a threaded hole communicated with the inner cavity is arranged on the upper end face of the base; the adjusting screw is connected in the threaded hole; a spring is supported between the lower end of the adjusting screw and the moving plate; a pinion is fixed at the upper end of the adjusting screw; the knob with the inner gear ring is sleeved on an mounting column of the base and can rotate; the pinion is meshed with the inner gear ring of the knob; and the trigger switch is fixed on the base and a contact of the trigger switch extends into the inner cavity of the base. The regulator can drive the adjusting screw to rotate to drive the deformation of the spring by only rotating the knob and realize the adjustment at maximum pressure without extra adjusting tool.

Description

Technical field [0001] The invention relates to a pressure regulator of an electric air pump. Background technique [0002] Portable electric air pumps are used to inflate tires, inflatable beds, inflatable boats and other inflated equipment, and to replace manual air pumps and other artificial air pumps to increase efficiency. In order to prevent the air pressure inside the inflated device from being too high after inflating, affecting normal use or even bursting, generally we will install a pressure regulator on the electric air pump, and turn the pressure regulator during use to preset a maximum inflation pressure , When the maximum pressure in the inflatable device reaches the preset maximum pressure, the pressure regulator works to cut off the power supply, so that the electric air pump stops inflating the inflated device to ensure the safe inflation of the inflated device by the electric air pump. [0003] The pressure regulator commonly used in existing electric air pumps i...

AI Technical Summary

Problems solved by technology

[0005] When adjusting the pressure, turn and adjust the pressure regulating contact bolt to increase the distance between the lower end surface of the pressure regulating contact bolt and the contact on the balance backing plate, so that the moving distance of the balance backing plate becomes longer, that is, it needs to overcome the longer The force generated by the deformation of the spring requires a large air pressure to push the balance backing plate to move to the contact and the contact bolt of the pressure regulating contact, and finally realize the adjustment and setting of the maximum air pressure. From the perspective of the structure of this patent, a screwdriver is needed To adjust the pressure regulating contact bolt, the operation is inconvenient; moreover, the elastic coefficient of each spring in the aforementioned voltage regulator is the same, if the elastic coefficient of each spring is small, although the maximum pressure of setting can be accurately read, the larger the set The set maximum pressure value will be low. If the elastic coefficient of each spring is large, then there will be a small angle of rotation of the pressure regulating contact bolt, and the setting of the maximum pressure will have a large change, and the maximum pressure cannot be adjusted accurately.

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