KR102382713B1 - Micro-inflation pump housing body structure and micro-inflation pump - Google Patents

Abstract

A micro air injection pump housing body structure and micro air injection pump are provided, wherein the micro air injection pump includes a pump housing body 110 , a cover plate 111 , and a diaphragm 120 that are detachably assembled. Among them, the hollow inner cavity 117 is installed in the pump housing body 110, the air inlet 112 is installed on the upper surface of the pump housing body 110, and the air outlet 115 is the pump housing body ( 110), the diaphragm 120 is located in the inner cavity 117 to separate the inner cavity 117 into an upper impeller chamber and a lower control chamber. The micro air injection pump housing body structure and the micro air injection pump separate the inner cavity 117 into an impeller chamber and a control chamber through a diaphragm 120 disposed in the pump housing body 110, thereby separating different internal parts, respectively. It is easy to assemble on the upper and lower surfaces of the diaphragm 120, and the overall structure is small and light, so it is convenient to carry and use.

Description

Micro-inflation pump housing body structure and micro-inflation pump

The present invention relates to the field of an air injection device, and more particularly, to a type of micro air injection pump housing body structure and a micro air injection pump.

This application requests the priority of the Chinese patent application filed with the Chinese Patent Office on 07/07/2017 with the application number 201710549083.3 and the title "Micro-air pump housing body structure and micro-air injection pump", the entire content of which , which is incorporated herein by reference.

An air injection pump, also called an air pump or an inflator, is an air injection mechanism that operates through the operation of a motor. The air injection pump may inject air into various products in daily life, for example, air cushions and air pillows that are always ready for travel; It can also be used as a vacuum cleaner to clean foreign substances in the keyboard. Many conventional air injection pumps have a large structure, are inconvenient to carry, and are cumbersome to use. Although there are currently some air injection pumps with a miniaturized structure, the inventor discovered that, through research, the conventional micro air injection pump has problems in that assembly is complicated and disassembly is inconvenient, although the structure is miniaturized.

It is an object of the present invention to provide a micro air injection pump housing body structure that facilitates assembly of internal parts of the micro air injection pump through the structure of the micro air injection pump housing body.

Another object of the present invention is to provide a micro air injection pump that is easy to assemble.

The embodiments of the present invention are implemented through the following technical solutions.

The micro air injection pump housing body structure is

a pump housing body in which a hollow inner cavity is installed therein, an air inlet is installed on the top surface, an air outlet is installed on a side end surface, and an opening suitable for assembling internal parts is further installed;

a diaphragm located in the inner cavity to separate the inner cavity into an impeller chamber and a control chamber; and

and a cover plate detachably assembled to the opening.

In addition, a through hole is provided in the diaphragm.

Further, the diaphragm enters the pump housing body through the opening, and is removably fixed in the inner cavity.

In addition, the pump housing body is integrally molded.

The micro air injection pump of the present invention is implemented as follows.

The micro air injection pump includes a micro air injection pump housing body structure,

a motor located in the control chamber and having an output shaft inserted into the impeller chamber;

an impeller assembly positioned in the impeller chamber and connected to the output shaft of the motor to control rotation by the output shaft of the motor;

a control circuit board located in the control chamber and configured to control the operation of the motor to rotate the impeller assembly;

It further includes a power supply unit electrically connected to the control circuit board.

In addition, both the motor and the control circuit board are fixedly connected to the diaphragm.

In addition, the micro air injection pump further includes an installation column connected to the diaphragm and located in the control chamber; The control circuit board is fixed to the mounting pole, and the control circuit board is positioned between the mounting pole and the motor.

In addition, a retainer plate that surrounds the periphery of the impeller assembly and is connected to the upper surface of the diaphragm is further disposed in the impeller chamber.

Further, the upper surface of the impeller assembly is lower than the upper surface of the retainer plate; The top face edge of the retainer plate is supported against the inner cavity wall of the pump housing body.

In addition, an air discharge nozzle which is lap-joined with the air discharge port is opened on the side end face of the retainer plate.

In addition, the control circuit board includes a single-chip microcomputer and an overcurrent protection circuit electrically connected to the single-chip microcomputer.

Further, the overcurrent protection circuit includes a protection chip, a control pin connected to the protection chip, a switch tube and a sensitive resistor;

The switch tube and the sensitive resistor are connected in series to the protection branch circuit of the protection chip, and both ends of the sensitive resistance are connected to the measuring pin of the protection chip; The switch tube is arranged to conduct or block the protective branch circuit.

In addition, the micro air injection pump further includes a switch button electrically connected to the single-chip microcomputer, and the switch button is for turning the motor on or off.

In addition, a switch hole is opened in the pump housing body, and a flexible anti-vibration stopper is installed in the switch hole portion; The flexible dust stopper and the switch button are arranged to trigger the switch button when pressed.

Also, the power supply unit includes a rechargeable battery; The rechargeable battery is electrically connected to the control circuit board.

In addition, the micro air injection pump further includes an input voltage conversion circuit electrically connected to the rechargeable battery and a USB input port electrically connected to the input voltage conversion circuit; The USB input port is installed on the pump housing body.

Further, the impeller assembly includes a rotating shaft and at least six blades uniformly distributed around the rotating shaft;

The blades are connected perpendicular to the axis of rotation; and

The blade includes a rectangular portion integrally formed and an isosceles trapezoid portion positioned above the rectangular portion.

The embodiment of the present invention has at least the following advantages and advantageous effects:

The micro air injection pump housing body structure and the micro air injection pump provided by the present invention separate the inner cavity of the pump housing body into an impeller chamber and a control chamber through a diaphragm disposed in the pump housing body, and separate different internal parts of the diaphragm It is easy to assemble on the upper and lower surfaces, that is, simply by realizing the assembly of the diaphragm and the pump housing body, the assembly of the entire micro air injection pump can be completed immediately, which improves the convenience of assembly and facilitates disassembly and repair. Do.

In order to more clearly explain the technical solution of the embodiment of the present invention, the accompanying drawings to be used among the embodiments are briefly introduced below, and the accompanying drawings merely show some embodiments of the present invention, so the scope should not be considered as limiting. It should be understood that, for those skilled in the art, other related drawings may be obtained based on these drawings, provided that they do not do creative labor.
1 is a first perspective view of the micro-air injection pump housing body structure provided in Embodiment 1 of the present invention.
Figure 2 is a second perspective view of the micro air injection pump housing body structure provided in Embodiment 1 of the present invention.
3 is a front view of the micro air injection pump housing body structure provided in Embodiment 1 of the present invention.
4 is a perspective view of a diaphragm provided in Embodiment 2 of the present invention.
5 is a front view of a diaphragm provided in Example 2 of the present invention.
6 is a front view after the motor is mounted on the diaphragm provided in Embodiment 2 of the present invention.
7 is a structural diagram of an overcurrent protection circuit provided in Embodiment 2 of the present invention.
8 is a structural diagram of a micro-air injection pump provided in Example 2 of the present invention.

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below by combining the accompanying drawings in the embodiments of the present invention. , it is obvious that the described implementation method is a part of the implementation method rather than the entire implementation method of the present invention. Based on the implementation mode in the present invention, all other implementation modes obtained under the premise that a person skilled in the art does not engage in creative work all fall within the protection scope of the present invention.

Accordingly, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely shows an alternative embodiment of the present invention. Based on the implementation mode in the present invention, all other implementation modes obtained under the premise that a person skilled in the art does not engage in creative work all fall within the protection scope of the present invention.

In the description of the present invention, the term indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is for convenience and simplification of the description of the present invention, and the device or element indicating or implying is Note that it does not necessarily have a specific orientation, nor does it refer to construction and operation in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, terms such as "installation", "connection", "combination", "fixing" and the like should be understood in a broad sense unless otherwise clearly defined and limited. For example, it may be fixedly connected, detachably connected, or integrally formed; It may be a mechanical connection or an electrical connection; It may be a direct connection, it may be an indirect connection through an intermediate medium, and the inside of two elements may be in communication, or it may be the interaction relationship of two elements. A person skilled in the art will be able to understand the specific meaning of the term in the present invention according to specific circumstances.

In the description of the present invention, the orientation or positional relationship indicated by "up", "down", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship usually placed when using the invention product, It is only for convenience of description and simplification of description of the present invention, and does not indicate that the device or element indicating or suggesting must have a specific orientation, or that it is constructed and operated in a specific orientation, and thus it is understood to limit the present invention. shouldn't In addition, terms such as "first", "second", etc. are for identification purposes only, and should not be understood as indicating or implying a relative importance.

Example 1:

This embodiment provides a micro air injection pump housing body structure, as shown in FIGS. 1 and 2, the pump housing body 110 and the cover plate 111, the air inlet 112, the air outlet 115 and a diaphragm 120 . Among them, the hollow inner cavity 117 is installed in the pump housing body 110, the air inlet 112 is installed on the upper surface of the pump housing body 110, and the air outlet 115 is the pump housing body ( 110), the diaphragm 120 is installed in the inner cavity 117 to separate the inner cavity 117 into the impeller chamber and the control chamber, and the air inlet 112 and the air outlet 115 are Both penetrate the impeller chamber and form an air flow passage. An opening suitable for assembling internal components is further installed in the pump housing body 110 , and a cover plate 111 detachably assembled in the opening portion is correspondingly installed. The opening may be installed on the side end face of the pump housing body 110, or it may be installed on the lower end face of the pump housing body 110, and the micro-air injection pump housing body structure in this embodiment forms the opening into the pump housing body ( 110) is installed on the lower section.

Referring to FIG. 8 , the design of the pump housing body 110 may adopt a cylindrical or quadrangular cylindrical design, but is not limited thereto.

Removable assembly of the pump housing body 110 and the cover plate 111 may adopt a fitting-type connection, but is not limited thereto, and specifically, the cover plate 111 on the edge of the lower section of the pump housing body 110 A fitting groove 119 suitable for insertion of the upper fitting fitting portion (not shown) is installed to implement assembly or removal of the pump housing body 110 and the cover plate 111 .

4 and 5, a positioning hole column (not shown) for assembling and positioning the diaphragm 120 on the wall of the inner cavity 117 of the pump housing body 110 is installed, and among the diaphragm 120 Through the screw hole 127 opened at the position corresponding to the positioning hole column, the screw is inserted into the screw hole 127 and the corresponding positioning hole column, and the diaphragm 120 is fixed to the pump housing body 110 . install The diaphragm 120 may enter and exit the inner cavity 117 through an opening installed in the pump housing body 110 .

4 and 5 , a through hole 125 is opened in the diaphragm 120 to facilitate assembling other internal parts of the micro air injection pump to the upper and lower end surfaces of the diaphragm 120 .

Additionally, in the present embodiment, the pump housing body 110 is manufactured by an integral molding process, which helps to reduce the appearance marks of assembly of the micro-air injection pump housing body structure, thereby further increasing the appearance of the external appearance. .

The micro-air injection pump housing body structure provided in this embodiment separates the inner cavity 117 into an impeller chamber and a control chamber through a diaphragm 120 disposed in the pump housing body 110, and separates different inner parts, respectively. It is easy to assemble on the upper and lower surfaces of the diaphragm 120, that is, simply by implementing the assembly of the diaphragm 120 and the pump housing body 110, the assembly of the entire micro-air injection pump can be completed immediately. Convenience is improved. The micro air injection pump housing body structure has a beautiful appearance by reducing assembly marks on the exterior, and the overall structure is small and light, making it convenient to carry and use.

Example 2:

This embodiment provides a micro air injection pump, as shown in FIGS. 5 to 8 and with reference to FIG. 3 , the micro air injection pump includes the micro air injection pump housing body structure provided in Embodiment 1, and a motor 150, an impeller assembly, a control circuit board, and a power supply unit. Among them, the motor 150 is located in the control chamber of the micro air injection pump housing body structure, and its output shaft is inserted into the impeller chamber from the through hole 125 installed in the diaphragm 120 . The impeller assembly is located in the impeller chamber, is connected to the output shaft of the motor 150 , and rotation is controlled by the output shaft of the motor 150 . The control circuit board is located in the control chamber and is electrically connected to the motor 150, and is for controlling the operation of the motor 150, that is, the control circuit board controls the operation of the motor 150 to rotate the impeller assembly. . The power supply unit is electrically connected to the control circuit board, and supplies electricity to the control circuit board and the motor 150 .

The control circuit board includes a single-chip microcomputer 130 and an overcurrent protection circuit electrically connected to the single-chip microcomputer 130 . Through the installed overcurrent protection circuit, when the current of the main circuit exceeds the rated current, the overcurrent protection circuit automatically cuts off the electricity to protect the micro air injection pump from being damaged.

The micro air injection pump further includes a switch button electrically connected to the single-chip microcomputer 130 , and by pressing the switch button, the on or off of the motor 150 can be controlled. Specifically, a switch hole facing the switch button 137 is opened on the wall of the inner cavity 117 of the pump housing body 110 , and the switch hole is suitable for operation by pressing the switch button 137 . In order to prevent foreign matter dust from entering the pump housing body 110, a flexible anti-vibration stopper (not shown) is installed at the switch hole. When the flexible dust-proof stopper is pressed, the flexible dust-proof stopper is in contact with the switch button 137 , thereby triggering the switch button 137 and controlling the on or off of the motor 150 .

Both the motor 150 and the control circuit board are fixed to the lower surface of the diaphragm 120 . Specifically, between the motor 150 and the diaphragm 120 is coupled through a screw. As shown in FIG. 6 , referring to FIG. 4 , in order to facilitate installation of the single-chip microcomputer 130 , an installation column 132 is installed on the lower surface of the diaphragm 120 . The installation post 132 is installed at a distance from the motor 150 while being perpendicular to the diaphragm 120 . When the control circuit board is installed between the installation post 132 and the motor 150, the protection of the control circuit board can be strengthened, and the probability that the control circuit board is damaged due to an external impact is reduced. In addition, the through groove 133 is disposed on the installation pillar 132 so that the switch button 137 passes through the installation pillar 132 , and the switch hole is installed corresponding to the through hole 133 on the installation pillar 132 . , it is easy to operate by pressing the switch button 137.

Referring to FIG. 4 , a retainer plate 122 that surrounds the periphery of the impeller assembly and is connected to the upper surface of the diaphragm 120 is further disposed in the impeller chamber. An air discharge nozzle 123 that is lap-joined with the air discharge port 115 is opened on the side end surface of the retainer plate 122, and the upper edge of the retainer plate 122 is the inner cavity 117 of the pump housing body 110. supported on the wall The combination of the retainer plate 122 and the air discharge nozzle 123 increases the cohesiveness of the wind from the air discharge nozzle 123 toward the air discharge port 115 . To facilitate the normal operation of the impeller assembly, the upper surface of the impeller assembly is lower than the upper surface of the retainer plate 122 .

Optionally, as shown in FIG. 7 , the overcurrent protection circuit includes a protection chip U1 , a control pin connected to the protection chip U1 , a switch tube U2 and a sensitive resistor RS. The switch tube U2 and the sensitive resistor RS are connected together in series to the protection branch circuit of the protection chip U1, and both ends of the sensitive resistance RS are connected to the measurement pin of the protection chip U1. The switch tube (U2) is for conducting or blocking the protective branch circuit. The protection chip U1 generates a control signal according to the measurement signal.

For those skilled in the art, the protection chip U1 may generate a control signal by calculating a current through the measured voltage and comparing a threshold value, as well as generating a control signal by measuring a physical signal such as temperature. you will understand that there is In other words, the sensitive resistance RS is one or more of a pressure sensitive resistance, a heat sensitive resistance, a photosensitive resistance, a moisture sensitive resistance, a magnetoresistance, and a gas sensitive resistance. A pin of the protection chip U1 generates a control signal when a predetermined threshold value is reached by measuring a corresponding physical signal. This embodiment will be described by taking the sensitive resistor RS as the step-down resistor, calculating the current through voltage measurement, and then comparing the threshold value to generate the control signal as an example. Through the installed sensitive resistor (RS), the filtering effect of the overcurrent protection circuit is strengthened and space consumption is reduced, and at the same time, the overcurrent protection threshold is accurate, the safety is good, and the technical effect of the power supply is long. .

The measuring pin of the protection chip U1 includes a pin VM and a pin VSS, the pin VM is connected in series with the resistor R2, and then the pin 1 of the sensitive resistor RS and the switch tube U2 ) is connected to the pin S2 and the pin S2', and the pin VSS is connected to the pin 2 and the port B- of the sensitive resistor RS. The measuring pin of the protection chip U1 includes a pin DO and a pin CO, the pin DO is connected to a pin G2 of the switch tube U2, and the pin CO is a switch tube U2 ) is connected to the pin (G1).

The overcurrent protection circuit further includes a resistor R1, a capacitor C1, a capacitor C2A, a capacitor C2B, a capacitor C3, a capacitor C4, and a resistor R3. Among them, the pin 1 of the resistor R1 is connected to the port B+, the port P+ and the pin 1 of the capacitor C4, and the pin 2 is the pin 1 of the capacitor C1. , connected to the pin VDD of the protection chip U1; After the pin 2 of the capacitor C1 is connected in series to the capacitor C2A and the capacitor C2B, the pin S1 of the switch tube U2, the pin S1', the pin 2 of the capacitor C3, connected to pin 2 and port P- of resistor R3; pin 1 of capacitor C3 is connected in series with capacitor C4 and then connected to port B+, pin 1 of resistor R1 and port P+; Pin 1 of resistor R3 is connected to port NTC.

The switch tube U2 uses a MOSFET tube, but is not limited thereto.

The overcurrent protection circuit is integrated on a circuit board installed in the control chamber, and the power supply for supplying electricity is the power supply unit in this embodiment.

The power supply unit in this embodiment includes a rechargeable battery (not shown). The rechargeable battery is located in the control chamber, and the rated voltage is set to 3.7V DC. The micro air injection pump includes an input voltage conversion circuit (not shown) electrically connected to the rechargeable battery and a USB input port 139 electrically connected to the input voltage conversion circuit. The USB input port 139 is installed on the pump housing body 110 . The rechargeable battery is charged via the USB input port 139 . The rated voltage of the USB input port 139 is 5V, and the 5V power charger is the most common cell phone power charger, and the rechargeable battery can be charged anytime, anywhere, thereby reducing the limitation of the charger selection. Through the installed input voltage conversion circuit, the input voltage conversion circuit is mainly composed of a converter, the converter is for converting the input 5V voltage to 3.7V to output.

Specifically, in order to meet the usage requirements, the rechargeable battery in this embodiment uses a polymer lithium battery, and in order to ensure the supply of electricity, it is preferable to install two polymer lithium batteries. In the actual assembly process, the polymer lithium battery may be directly attached to the wall of the inner cavity 117 of the pump housing body 110, or a lithium battery fixing plate is disposed on the lower surface of the diaphragm 120 to attach the polymer lithium battery to the diaphragm 120 ) can also be fixed.

5, the impeller assembly includes at least six blades 142 uniformly distributed around the rotation shaft 140 and the rotation shaft 140, 6 or 8 can be selectively installed, and actual micro-air injection A specific number of blades 142 may be set according to the size of the pump. The blade 142 is vertically connected to the rotation shaft 140, and the vertical connection method is easy to amplify the amount of air introduced through the air inlet. In addition, the blade 142 includes a rectangular portion integrally formed and an isosceles trapezoid portion positioned above the rectangular portion. The base portion of the isosceles trapezoid portion is connected to the rectangular portion, that is, the combination of the waist structure of the isosceles trapezoid portion and the rectangular portion further amplifies the rotational force of the wind to increase the air volume of the air outlet 115 .

3, in order to allow the micro air injection pump of the present invention to be applied to more product demands, the adapter member 160 having a plurality of adapter heads 162 having different diameters is mounted to the air outlet 115. .

When the micro air injection pump is used for a long time, in order to allow the thermal energy emitted by the motor 150 to be immediately discharged, there is a slight heat dissipation groove in the wall of the inner cavity 117 of the pump housing body 110 corresponding to the control chamber ( not shown) is installed.

The assembly process of the micro-air injection pump in this embodiment is as follows: the motor 150 is installed on the lower surface of the diaphragm 120, for example, using a screw (but not limited thereto) to the motor 150 ) is connected and fixed, and the output shaft of the motor 150 passes through the through hole 125 of the diaphragm 120 . Thereafter, the rotation shaft 140 of the impeller assembly is fixedly connected to a portion fitted to the output shaft of the impeller chamber of the motor 150 so that the output shaft of the motor 150 rotates the rotation shaft 140 of the impeller assembly, and then the control circuit board is fixed to the installation column 132 . After completing the above steps, the diaphragm 120 is inserted into the inner cavity 117 of the pump housing body 110, and the diaphragm 120 installed on the wall of the inner cavity 117 of the pump housing body 110 is assembled. The diaphragm 120 is fixed to the pump housing body 110 by using, for example, a screw (but not limited thereto) through a positioning hole column for positioning. Thereafter, the lithium polymer battery is fixed to the wall of the inner cavity 117 of the pump housing body 110 through an adhesive member, for example, a double-sided adhesive (but not limited thereto). Finally, when the cover plate 111 is covered on the lower surface of the pump housing body 110, the overall installation of the micro air injection pump is completed.

The micro air injection pump provided in this embodiment separates the inner cavity 117 of the pump housing body 110 into an impeller chamber and a control chamber through a diaphragm 120 disposed in the pump housing body 110, It is easy to assemble the parts on the upper and lower surfaces of the diaphragm 120, respectively, that is, simply by implementing the assembly of the diaphragm 120 and the pump housing body 110, the assembly of the entire micro air injection pump can be completed immediately. It is easy to disassemble and repair at the same time as the convenience of assembly is improved.

The above description is merely a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various changes and changes to the present invention. Any modification, equivalent replacement, improvement, etc. carried out within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

The micro air injection pump housing body structure and the micro air injection pump provided by the present invention separate the inner cavity of the pump housing body into an impeller chamber and a control chamber through a diaphragm disposed in the pump housing body, and separate different internal parts of the diaphragm It is easy to assemble on the upper and lower surfaces, that is, simply by realizing the assembly of the diaphragm and the pump housing body, the assembly of the entire micro air injection pump can be completed immediately, which improves the convenience of assembly and facilitates disassembly and repair. .

110: pump housing body 111: cover plate
112: air inlet 115: air outlet
117: inner cavity 119: fitting groove
120: diaphragm 122: retaining plate
123: air discharge nozzle 125: through hole
127 screw hole 130 single chip microcomputer
132: single chip microcomputer installation post 133: through hole
137: switch button 139: USB input port
140: axis of rotation 142: blade
150: motor 160: no adapter
162: adapter head U1: protection chip
U2: Switch tube RS: Sensitive resistance
R1: resistance R2: resistance
R3: Resistor C1: Capacitor
C2A: Capacitor C2B: Capacitor
C3: Capacitor C4: Capacitor

Claims (17)

a pump housing body in which a hollow inner cavity is installed therein, an air inlet is installed on the top surface, an air outlet is installed on the side end surface, and an opening suitable for assembling internal parts is further installed;
a diaphragm located in the inner cavity to separate the inner cavity into an impeller chamber and a control chamber;
a cover plate detachably assembled to the opening;
a motor positioned in the control chamber and having an output shaft inserted into the impeller chamber;
an impeller assembly located in the impeller chamber, connected to the output shaft of the motor, the rotation of which is controlled by the output shaft of the motor;
a control circuit board located in the control chamber and configured to control operation of the motor to rotate the impeller assembly; and
a power supply unit electrically connected to the control circuit board;
includes,
The control circuit board,
A single-chip microcomputer and an overcurrent protection circuit electrically connected to the single-chip microcomputer,
The overcurrent protection circuit,
It includes a protection chip, a control pin connected to the protection chip, a switch tube, and a sensitive resistor,
The switch tube and the sensitive resistor are
connected in series to the protection branch circuit of the protection chip, and both ends of the sensitive resistor are connected to the measurement pin of the protection chip,
The switch tube is a micro air injection pump, characterized in that it is arranged to conduct or block the protective branch circuit. According to claim 1,
Micro-air injection pump, characterized in that the through-hole is installed in the diaphragm. According to claim 1,
The diaphragm enters the pump housing body through the opening, and is detachably fixed in the inner cavity. According to claim 1,
The pump housing body is a micro-air injection pump, characterized in that molded integrally. delete According to claim 1,
The micro-air injection pump, characterized in that both the motor and the control circuit board are fixedly connected to the diaphragm. 7. The method of claim 6,
The micro air injection pump further includes an installation column connected to the diaphragm and positioned in the control chamber; The control circuit board is fixed to the installation pillar, and the control circuit board is located between the installation pillar and the motor. According to claim 1,
The micro-air injection pump, characterized in that the retainer plate is further disposed in the impeller chamber to surround the periphery of the impeller assembly and connected to the upper surface of the diaphragm. 9. The method of claim 8,
a top surface of the impeller assembly is lower than a top surface of the retainer plate; and an edge of the upper surface of the retainer plate is supported on the inner cavity wall of the pump housing body. 9. The method of claim 8,
The micro air injection pump, characterized in that the air discharge nozzle and the air discharge nozzle lap joint is opened on the side end face of the retainer plate. delete delete According to claim 1,
The micro air injection pump further comprises a switch button electrically connected to the single chip microcomputer, wherein the switch button is for turning the motor on or off. 14. The method of claim 13,
A switch hole is opened in the pump housing body, and a flexible dust-proof stopper is installed in the switch hole portion; The flexible dust-proof stopper and the switch button are micro-air injection pump, characterized in that it is arranged to trigger the switch button when the flexible dust-proof stopper is pressed. According to claim 1,
the power supply unit includes a rechargeable battery; The rechargeable battery is a micro air injection pump, characterized in that connected to the control circuit board. 16. The method of claim 15,
the micro air injection pump further includes an input voltage conversion circuit electrically connected to the rechargeable battery and a USB input port electrically connected to the input voltage conversion circuit; The USB input port is a micro air injection pump, characterized in that installed in the pump housing body. According to claim 1,
the impeller assembly includes a rotating shaft and at least six blades uniformly distributed around the rotating shaft;
the blades are vertically connected to the axis of rotation; and
The blade is a micro-air injection pump, characterized in that it comprises a rectangular portion integrally molded and an isosceles trapezoid portion positioned above the rectangular portion.

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