High negative pressure micro air pump

Abstract

The utility model relates to micro air pump technical field discloses a kind of high negative pressure micro air pump, it is inserted motor in the bottom surface of pump bottom shell, eccentric wheel is driven by motor, eccentric wheel drives steel needle, swing lever is driven by steel needle, swing lever drives rubber bowl to produce deformation extraction gas and exhaust gas;When air intake, airflow enters the cavity of one rubber bowl in pump, rubber bowl is extruded by swing lever and exhausts airflow to the airflow channel in the upper cover of pump and enters another rubber bowl, at this time, another rubber bowl is just in the state of inhaling under the action of swing lever, thereby further improve the negative pressure of pump. Compared with the original micro air pump, the utility model reduces external hose and production cost under the condition of ensuring high negative pressure in pump.

Description

Technical Field

[0001] This utility model relates to the field of micro pump technology, and more specifically, to a high negative pressure micro air pump. Background Technology

[0002] A miniature air pump is a small instrument with an inlet and an outlet, generating negative pressure at the inlet and positive pressure at the outlet. Currently, miniature air pumps use a motor to drive an eccentric wheel, which in turn drives a steel needle. The steel needle then drives a pendulum to compress a rubber cup, creating a sealed vacuum environment to evacuate gas. However, existing high-negative-pressure miniature air pumps contain four nozzles, two of which require flexible hoses to achieve high negative pressure. This method has high production costs, and the hoses are prone to detachment.

[0003] Therefore, how to reduce production costs has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a high negative pressure micro air pump, which is in contrast to the existing micro air pumps in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a high negative pressure micro air pump, which has the following features: The pump bottom shell is a hollow shell with a through hole on one side and screw holes on both sides of the through hole. The motor has its shaft passing through the through hole and extending into the pump base housing, and is secured with screws. An eccentric wheel is disposed inside the pump bottom housing and connected to the shaft of the motor; the eccentric wheel is provided with an eccentric hole. The swing arm has a cylinder at each end, and a through hole in the middle of each cylinder. The center of the swing arm has a steel needle hole. A steel needle passes through a steel needle hole at the center of the swing arm and is positioned inside the eccentric hole of the eccentric wheel; The middle frame has a tetrahedral structure, and there are two through holes on both sides inside for installing rubber cups. The rubber cup is bowl-shaped with a strip-shaped protrusion on the top. After passing through the middle frame, the bottom of the rubber cup is mounted on the cylinder of the swing rod and fixed with glue. There are two rubber cups, which are not connected to each other. The rubber valve plate is elliptical in shape, with four semi-circular through holes in the middle and a semi-circular diaphragm on one side of the through holes. The rubber valve plate is set in a groove on one side of the pump upper housing. The plastic gasket is oval in shape and has four through holes in the middle. The plastic gasket is placed inside the upper housing of the pump, and the rubber valve plate is sandwiched between the upper housing of the pump and the plastic gasket. The pump upper housing is rectangular. Two air nozzles are provided on one side of the pump upper housing, and each air nozzle has a vent hole. An elliptical groove is provided on the other side, and an airflow groove is provided in the groove. The airflow groove connects the airflow in the rubber cup to each other, thereby increasing the negative pressure. During operation, the motor rotates, driving the eccentric wheel to rotate, which in turn causes the steel needle to swing left and right. The steel needle then drives the rocker arm to swing up and down, thereby deforming the rubber cups to draw in and expel gas. During intake, the airflow enters the cavity of one rubber cup inside the pump. The rubber cup, squeezed by the rocker arm, forces the airflow into the airflow channel inside the pump cover, which then enters another rubber cup. At this time, the other rubber cup is in an intake state under the action of the rocker arm, thus further increasing the negative pressure of the pump. Compared with the original micro air pump, this invention reduces the need for external hoses while maintaining high negative pressure inside the pump, thereby reducing production costs. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a perspective view of an embodiment of a high negative pressure micro air pump provided by this utility model; Figure 2 This is a perspective view of another embodiment of a high negative pressure micro air pump provided by this utility model; Figure 3 This is a top view of the pump housing of a high negative pressure micro air pump provided by this utility model; Detailed Implementation

[0007] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0008] like Figures 1-2 As shown, in the first embodiment of a low-noise micro air pump of this utility model, the low-noise micro air pump includes a motor 101, a pump base shell 102, an eccentric wheel 103, a steel needle 104, a swing arm 105, a middle frame 106, rubber cups 107 (107a, 107b), a plastic gasket 108, a rubber valve plate 109, and a pump upper shell 110.

[0009] The pump bottom shell 102 is formed as a hollow shell, and a through hole is provided on one side of the pump bottom shell 102, and screw holes are provided on both sides of the through hole. The motor 101 has its shaft passing through the through hole and extending into the pump base housing 102, and is fixed with screws; An eccentric wheel 103 is disposed inside the pump base housing 102 and connected to the shaft of the motor 101. The eccentric wheel 103 is provided with an eccentric hole. The swing arm 105 has a cylinder at each end, and a through hole in the middle of each cylinder. The swing arm 105 has a steel needle hole in the center. The steel needle 104 passes through the steel needle hole at the center of the rocker arm and is set in the eccentric hole of the eccentric wheel 103; The middle frame 106 has a tetrahedral structure, and two through holes (107a, 107b) are provided on both sides of its interior for installing rubber cups 107. The rubber cups 107 (107a, 107b) are bowl-shaped, with strip-shaped protrusions on the top. The rubber cups 107 (107a, 107b) pass through the middle frame 106 and their bottoms are mounted on the cylinder of the swing rod 105 and fixed with glue. There are two rubber cups 107 (107a, 107b), which are not connected to each other. The rubber valve plate 109 is elliptical in shape, with four semi-circular through holes in the middle and a semi-circular diaphragm on one side of the through holes. The rubber valve plate 109 is set in a groove on one side of the pump upper housing. The plastic gasket 108 is elliptical in shape and has four through holes in the middle. The plastic gasket 108 is placed inside the pump upper housing and the rubber valve plate 109 is sandwiched between the pump upper housing 110 and the plastic gasket 108. The upper housing 110 of the pump is rectangular. Two air nozzles are provided on one side of the upper housing 110, and each air nozzle has a vent hole. An elliptical groove is provided on the other side, and an airflow groove is provided in the groove. The airflow groove connects the airflow in the rubber cup to each other, thereby increasing the negative pressure. During operation, the motor rotates, driving the eccentric wheel to rotate, which in turn causes the steel needle to swing left and right. The steel needle then drives the rocker arm to swing up and down, thereby deforming the rubber cups to draw in and expel gas. During intake, the airflow enters the cavity of one rubber cup inside the pump. The rubber cup, squeezed by the rocker arm, forces the airflow into the airflow channel inside the pump cover, which then enters another rubber cup. At this time, the other rubber cup is in an intake state under the action of the rocker arm, thus further increasing the negative pressure of the pump. Compared with the original micro air pump, this invention reduces the need for external hoses while maintaining high negative pressure inside the pump, thereby reducing production costs.

[0010] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A high negative pressure micro air pump, characterized in that, have: The pump bottom shell is a hollow shell with a through hole on one side and screw holes on both sides of the through hole. The motor has its shaft passing through the through hole and extending into the pump base housing, and is secured with screws. An eccentric wheel is disposed inside the pump bottom housing and connected to the shaft of the motor; the eccentric wheel is provided with an eccentric hole. The swing arm has a cylinder at each end, and a through hole in the middle of each cylinder. The center of the swing arm has a steel needle hole. A steel needle passes through a steel needle hole at the center of the swing arm and is positioned inside the eccentric hole of the eccentric wheel; The middle frame has a tetrahedral structure, and there are two through holes on both sides inside for installing rubber cups. The rubber cup is bowl-shaped with a strip-shaped protrusion on the top. After passing through the middle frame, the bottom of the rubber cup is mounted on the cylinder of the swing rod and fixed with glue. There are two rubber cups, which are not connected to each other. The rubber valve plate is elliptical in shape, with four semi-circular through holes in the middle and a semi-circular diaphragm on one side of the through holes. The rubber valve plate is set in a groove on one side of the pump upper housing. The plastic gasket is oval in shape and has four through holes in the middle. The plastic gasket is placed inside the upper housing of the pump, and the rubber valve plate is sandwiched between the upper housing of the pump and the plastic gasket. The pump housing is rectangular. Two air nozzles are provided on one side of the pump housing, each with a vent hole. An elliptical groove is provided on the other side, with an airflow groove inside. The airflow groove connects the airflow inside the rubber cup, thereby increasing the negative pressure.

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