Low-noise miniature air pump

Abstract

The utility model relates to the technical field of miniature air pumps, and discloses a low-noise miniature air pump which is characterized in that a motor is inserted into the bottom surface of a pump bottom shell, the motor drives an eccentric wheel, the eccentric wheel drives a steel needle, the steel needle drives a swing rod, and the swing rod drives a rubber cup to deform to extract air and exhaust air; air enters the small through hole in the connecting position of the rubber cup through the air inlet and then enters the bottom shell. During air inlet, the umbrella nails of the ultrasonic lower shell are closed, the semicircular valve plate at the bottom of the rubber cup is opened, and air enters a cup cavity through the through hole in the middle of the cylinder of the swing rod; during air outlet, a semicircular valve plate at the bottom of the rubber cup is closed, and umbrella nails of the ultrasonic lower shell are opened to discharge air; the gas trend forms buffering in the ultrasonic upper shell and the pump bottom shell, and noise generated when the pump works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of micro pumps, and more specifically to a low-noise micro air pump. Background Art

[0002] A micro air pump is a small instrument with an air inlet and an air outlet, which generates negative pressure at the air inlet and positive pressure at the air outlet. At present, a micro air pump drives an eccentric wheel through a motor, which drives a steel needle, which drives a swing rod to squeeze a rubber cup to form a sealed vacuum environment and pump up gas. However, existing micro air pumps are noisy, which affects the user experience when working.

[0003] Therefore, how to reduce noise becomes a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a low-noise micro air pump for the above-mentioned existing micro air pump in the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is to construct a low-noise micro air pump having:

[0006] The pump bottom shell is formed as a hollow structure shell, a through hole is provided on one side of the pump bottom shell, screw holes are provided on both sides of the through hole, and the motor is conveniently fixed with screws, a flat groove is provided on one side of the pump bottom shell, and a strip groove is provided on the other side;

[0007] A rubber gasket, which is hexagonal in shape, has a through hole in the center, screw holes on both sides of the through hole, and is disposed in a flat groove of the pump bottom shell;

[0008] A motor, the shaft of which passes through the through hole and extends into the pump bottom shell and is fixed with screws;

[0009] An eccentric wheel, which is arranged in the pump bottom shell and connected to the shaft of the motor, and the eccentric wheel is provided with an eccentric hole;

[0010] A swing rod, each end of which is provided with a cylinder, each cylinder has a through hole in the middle, and a steel pinhole is provided in the center of the swing rod;

[0011] A steel needle passes through the steel needle hole at the center of the swing rod and is arranged in the eccentric hole of the eccentric wheel;

[0012] A sealing ring, which is installed in the strip-shaped groove of the bottom shell;

[0013] The middle frame is a tetrahedral structure, with two large through holes for installing rubber cups on both sides of the middle frame, and two small through holes in the middle of the middle frame for airflow to pass through;

[0014] The rubber cup has two bowl-shaped cavities connected, and two small through holes are provided at the connection. A strip-shaped protrusion is provided on the top of the rubber cup. When installed, the air between the cup cavity and the small through hole can be isolated by extruding and deforming with the ultrasonic lower shell. A semicircular valve sheet is provided at the bottom of the rubber cup. After the rubber cup passes through the middle frame, its bottom is arranged on the cylinder of the swing rod.

[0015] The ultrasonic lower shell has a tetrahedral structure, with two circular grooves in the middle, a through hole in the center of each of the two circular grooves, and three through holes arranged in an equilateral triangle are arranged around each of the through holes;

[0016] Rubber umbrella nails, which are arranged in two circular grooves of the ultrasonic lower shell;

[0017] The ultrasonic upper shell is provided with two air guide columns, with through holes in the middle of the columns, one for air inlet and the other for air outlet, which is installed on the ultrasonic lower shell and welded by ultrasonic equipment to prevent air leakage;

[0018] During operation, the rotation of the motor drives the eccentric wheel to rotate, which in turn drives the steel needle to swing left and right, and the steel needle then drives the rocker arm to swing up and down, thereby driving the rubber cup to deform, extracting and exhausting gas; the gas enters the small through hole at the connection of the rubber cup through the air inlet, and then enters the bottom shell; when taking in air, the umbrella nail of the ultrasonic lower shell is closed, the semicircular valve plate at the bottom of the rubber cup is opened, and the gas enters the cup cavity through the through hole in the middle of the rocker arm cylinder; when exhausting air, the semicircular valve plate at the bottom of the rubber cup is closed, and the umbrella nail of the ultrasonic lower shell is opened to exhaust gas; this gas direction forms a buffer in the ultrasonic upper shell and the pump bottom shell, reducing the noise generated when the pump is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a stereogram of an embodiment of a low-noise micro air pump provided by the utility model;

[0021] Figure 2 It is a stereogram of another embodiment of a low-noise micro air pump provided by the utility model;

[0022] Figure 3 It is a top view of a rubber cup of a low-noise micro air pump provided by the utility model; DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0024] like Figure 1-Figure 2As shown, in a first embodiment of a low-noise micro air pump of the utility model, the low-noise micro air pump includes a motor 101, a rubber gasket 102, a pump bottom shell 103, a short screw 104, an eccentric wheel 105, a rocker rod 106, a steel needle 107, a sealing ring 108, a middle frame 109, a rubber leather cup 110, an ultrasonic lower shell 111, rubber umbrella nails 112 (112a, 112b), an ultrasonic upper shell 113, and a long screw 114.

[0025] Among them, the pump bottom shell 103 is formed as a hollow structure shell, a through hole is provided on one side of the pump bottom shell 103, screw holes are provided on both sides of the through hole, short screws 104 pass through the screw holes to fix the motor 101, a flat groove is provided on one side of the pump bottom shell 103 for installing the rubber gasket 102, and a strip groove is provided on the other side for installing the sealing ring 108.

[0026] The rotating shaft of the motor 101 passes through the through hole and extends into the pump bottom housing 103;

[0027] The eccentric wheel 105 is arranged in the pump bottom shell 103 and connected to the shaft of the motor 101. The eccentric wheel 105 is provided with an eccentric hole;

[0028] The two ends of the swing rod 106 are respectively provided with a cylinder, and the middle of the cylinder is respectively provided with a through hole, and the center of the swing rod is provided with a steel pinhole;

[0029] The steel needle 107 passes through the steel needle hole in the center of the swing rod 106 and is arranged in the eccentric hole of the eccentric wheel 105;

[0030] The middle frame 109 is a tetrahedral structure, and two large through holes for mounting the rubber cup 110 are provided on both sides of the middle frame 109, and two small through holes are provided in the middle of the middle frame 109 to allow airflow to pass through;

[0031] The two bowl-shaped cavities of the rubber cup 110 are connected, and two small through holes are provided at the connection. A strip-shaped protrusion is provided on the top of the rubber cup 110. When installed, the air between the cup cavity and the small through hole can be isolated by fitting and extruding and deforming with the ultrasonic lower shell 111. A semicircular valve sheet is provided at the bottom of the rubber cup 110. After the rubber cup 110 passes through the middle frame 109, its bottom is arranged on the cylinder of the swing rod 106.

[0032] The ultrasonic lower shell 111 is a tetrahedral structure, with two circular grooves in the middle, a through hole in the center of each of the two circular grooves, and three through holes arranged in an equilateral triangle are arranged around the through hole;

[0033] The rubber umbrella nails 112 (112a, 112b) are arranged in two circular grooves of the ultrasonic lower shell 111;

[0034] The ultrasonic upper shell 113 is provided with two air guide columns, with through holes in the middle of the columns, one for air inlet and the other for air outlet. It is installed on the ultrasonic lower shell 111 and welded by ultrasonic equipment to prevent air leakage.

[0035] Specifically, the ultrasonic upper shell 113 and the ultrasonic lower shell 111 are welded and then installed on the middle frame 109 , and finally the entire pump is fixed by long screws 114 .

[0036] When the pump is working, the rotation of the motor drives the eccentric wheel to rotate, which in turn drives the steel needle to swing left and right, and the steel needle then drives the rocker arm to swing up and down, thereby driving the rubber cup to deform, extracting and exhausting gas; the gas enters the small through hole at the connection of the rubber cup through the air inlet, and then enters the bottom shell; when air is taken in, the umbrella nail of the ultrasonic lower shell is closed, the semicircular valve plate at the bottom of the rubber cup is opened, and the gas enters the cup cavity through the through hole in the middle of the rocker arm cylinder; when air is exhausted, the semicircular valve plate at the bottom of the rubber cup is closed, and the umbrella nail of the ultrasonic lower shell is opened to exhaust the gas; this gas direction forms a buffer in the ultrasonic upper shell and the pump bottom shell, reducing the noise generated when the pump is working.

[0037] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A low-noise micro air pump, characterized in that: have: The pump bottom shell is formed as a hollow structure shell, a through hole is provided on one side of the pump bottom shell, screw holes are provided on both sides of the through hole, and the motor is conveniently fixed with screws, a flat groove is provided on one side of the pump bottom shell, and a strip groove is provided on the other side; A rubber gasket, which is hexagonal in shape, has a through hole in the center, screw holes on both sides of the through hole, and is disposed in a flat groove of the pump bottom shell; A motor, the shaft of which passes through the through hole and extends into the pump bottom shell and is fixed with screws; An eccentric wheel, which is arranged in the pump bottom shell and connected to the shaft of the motor, and the eccentric wheel is provided with an eccentric hole; A swing rod, each end of which is provided with a cylinder, each cylinder has a through hole in the middle, and a steel pinhole is provided in the center of the swing rod; A steel needle passes through the steel needle hole at the center of the swing rod and is arranged in the eccentric hole of the eccentric wheel; A sealing ring, which is installed in the strip-shaped groove of the bottom shell; The middle frame is a tetrahedral structure, with two large through holes for installing rubber cups on both sides of the middle frame, and two small through holes in the middle of the middle frame for airflow to pass through; The rubber cup has two bowl-shaped cavities connected, and two small through holes are provided at the connection. A strip-shaped protrusion is provided on the top of the rubber cup. When installed, the air between the cup cavity and the small through hole can be isolated by extruding and deforming with the ultrasonic lower shell. A semicircular valve sheet is provided at the bottom of the rubber cup. After the rubber cup passes through the middle frame, its bottom is arranged on the cylinder of the swing rod. The ultrasonic lower shell has a tetrahedral structure, with two circular grooves in the middle, a through hole in the center of each of the two circular grooves, and three through holes arranged in an equilateral triangle are arranged around the through hole; Rubber umbrella nails, which are arranged in two circular grooves of the ultrasonic lower shell; The ultrasonic upper shell is provided with two air guide columns, with through holes in the middle of the columns, one for air inlet and the other for air outlet, which is installed on the ultrasonic lower shell and welded by ultrasonic equipment to prevent air leakage; When the pump is working, the rotation of the motor drives the eccentric wheel to rotate, which in turn drives the steel needle to swing left and right, and the steel needle then drives the rocker arm to swing up and down, thereby driving the rubber cup to deform, extracting and exhausting gas; the gas enters the small through hole at the connection of the rubber cup through the air inlet, and then enters the bottom shell; when air is taken in, the umbrella nail of the ultrasonic lower shell is closed, the semicircular valve plate at the bottom of the rubber cup is opened, and the gas enters the cup cavity through the through hole in the middle of the rocker arm cylinder; when air is exhausted, the semicircular valve plate at the bottom of the rubber cup is closed, and the umbrella nail of the ultrasonic lower shell is opened to exhaust the gas; this gas direction forms a buffer in the ultrasonic upper shell and the pump bottom shell, reducing the noise generated when the pump is working.

Images