A diaphragm air pump and an electric breast pump

Abstract

This utility model relates to the field of diaphragm air pump technology, specifically to a diaphragm air pump and an electric breast pump, including a valve plate, a rear cover, a bottom cover, a brushless external rotor motor, and an eccentric transmission structure. The valve plate is mounted on the rear cover, and a diaphragm is installed inside the pump chamber of the valve plate. The valve plate has an inlet pin and an outlet pin respectively in its inlet and outlet channels. The bottom cover is fixed to the rear cover, and the brushless external rotor motor is integrated with the bottom cover, driving the diaphragm to reciprocate within the pump chamber via the eccentric transmission structure. This utility model of a diaphragm air pump integrates the brushless motor with the bottom cover, further compressing the pump body volume by riveting the brushless motor control board, motor stator, and bearings to the bottom cover. Using an external rotor brushless motor eliminates the carbon brush structure of brushed motors, thus avoiding the risk of carbon buildup and short circuits leading to shutdown, significantly improving the pump's lifespan.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm air pump technology, specifically to a diaphragm air pump and an electric breast pump. Background Technology

[0002] The air intake chamber of a diaphragm air pump typically uses an inlet check valve and an outlet check valve for unidirectional airflow. When the diaphragm air pump is working, the pressure difference opens the inlet check valve, allowing air to be drawn in, and then the drawn-in air is discharged through the outlet check valve, thus achieving gas flow control. Currently, this type of eccentric diaphragm air pump uses a brushed motor, resulting in a large size and heavy weight. Furthermore, when used with the frequent start-stop cycle of a breast pump, there is a risk of carbon buildup leading to motor short circuits and a short pump lifespan. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to reduce the volume, weight, noise, vibration and extend the life of the air pump in a limited space.

[0004] At least one embodiment of the present invention provides a diaphragm air pump, including a valve plate, a rear cover, a bottom cover, a brushless external rotor motor, and an eccentric transmission structure;

[0005] The valve plate is mounted on the rear cover. A diaphragm is provided in the pump chamber of the valve plate. An inlet umbrella and an outlet umbrella are respectively provided in the inlet and outlet channels of the valve plate. The inlet umbrella and the outlet umbrella act as one-way valves to prevent gas backflow.

[0006] The bottom cover is fixed on the rear cover. The combination of the rear cover and the bottom cover effectively reduces noise. The brushless external rotor motor is integrated with the bottom cover and drives the diaphragm to reciprocate within the pump chamber through an eccentric transmission structure.

[0007] In a diaphragm air pump provided in one embodiment of this utility model, the brushless external rotor motor includes a motor shaft, an external rotor, a motor stator, bearings, and a brushless motor control board. The motor stator, bearings, and brushless motor control board are riveted to the bottom cover. The motor shaft is installed inside the bottom cover through the bearings, which reduces rotational friction. One end of the motor shaft passes through the bearings and is fixedly connected to the external rotor. The other end of the motor shaft extends into the rear cover and is connected to the eccentric transmission structure. The brushless motor control board controls the coil to generate a magnetic field by switching it on and off, providing power to the external rotor. After the brushless external rotor motor starts, the rotation of the motor shaft drives the eccentric wheel to rotate. The eccentric wheel drives the connecting rod to reciprocate in a direction perpendicular to the motor shaft, driving the diaphragm compressor pump chamber to cyclically increase and decrease the volume of the pump chamber. The pump chamber, the inlet umbrella, and the outlet umbrella form a unidirectional air path. The volume change of the pump chamber causes the gas to flow from the inlet channel of the pump body to the outlet channel of the pump body, and the air pump performs the pumping operation.

[0008] In a diaphragm air pump provided in one embodiment of the present invention, the eccentric transmission structure includes an eccentric wheel and a connecting rod fixed on the motor shaft. One end of the connecting rod is connected to the eccentric wheel through a ball bearing, and the other end of the connecting rod is fixedly connected to the diaphragm through a fastener.

[0009] In a diaphragm air pump provided in one embodiment of the present invention, the fastener includes a diaphragm fixing plate and a connecting rod screw, wherein the connecting rod screw passes through the diaphragm fixing plate and is threadedly connected to the connecting rod.

[0010] In one embodiment of the diaphragm air pump provided by this utility model, the valve plate is ultrasonically welded with a top cover to prevent air leakage.

[0011] One embodiment of this utility model also provides an electric breast pump, including the diaphragm air pump described above.

[0012] The beneficial effects of this utility model are as follows: This utility model diaphragm air pump uses an external rotor brushless motor, integrating the brushless motor with the bottom cover. By riveting the brushless motor control board, motor stator, and bearings onto the bottom cover, the pump body volume is further compressed. Using an external rotor brushless motor eliminates the carbon brush structure of brushed motors, thus eliminating the risk of carbon buildup and short circuits that could cause shutdowns, and significantly improving the pump body's lifespan. Attached Figure Description

[0013] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the diaphragm air pump of this utility model.

[0015] Figure 2 This is another structural schematic diagram of the diaphragm air pump of this utility model.

[0016] The labels in the diagram represent: 1. Top cover; 2. Valve plate; 3. Diaphragm fixing plate; 4. Diaphragm; 5. Rear cover; 6. Connecting rod; 7. Ball bearing; 8. Eccentric wheel; 9. Motor shaft; 10. Connecting rod screw; 11. Motor outer rotor; 12. Motor stator; 13. Bottom cover; 14. Bearing; 15. Inlet umbrella pin; 16. Outlet umbrella pin. Detailed Implementation

[0017] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0018] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] The diaphragm air pump provided in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] This embodiment provides a diaphragm air pump. Figure 1 This is a schematic diagram of the structure of the diaphragm air pump of this utility model; Figure 2 This is another structural schematic diagram of the diaphragm air pump of this utility model.

[0021] A diaphragm air pump provided in one embodiment of the present invention includes a valve plate 2, a rear cover 5, a bottom cover 13, a brushless external rotor motor, and an eccentric transmission structure.

[0022] The valve plate 2 is mounted on the rear cover 5. The pump chamber of the valve plate 2 is provided with a diaphragm 4. The air inlet channel and the air outlet channel of the valve plate 2 are respectively provided with an air inlet umbrella 15 and an air outlet umbrella 16. The air inlet umbrella 15 and the air outlet umbrella 16 act as one-way valves to prevent gas backflow.

[0023] The bottom cover 13 is fixed on the rear cover 5. The combination of the rear cover 5 and the bottom cover 13 effectively reduces noise. The brushless external rotor motor is integrated with the bottom cover 13 and drives the diaphragm 4 to reciprocate in the pump chamber through the eccentric transmission structure.

[0024] In one embodiment of the diaphragm air pump provided by this utility model, the brushless external rotor motor includes a motor shaft 9, an external rotor 11, a motor stator 12, a bearing 14, and a brushless motor control board. The motor stator 12, bearing 14, and brushless motor control board are riveted to the bottom cover 13. The motor shaft 9 is installed inside the bottom cover 13 through the bearing 14. One end of the motor shaft 9 passes through the bearing 14 and is fixedly connected to the external rotor 11. The bearing 14 mounts the motor shaft 9 to reduce rotational friction. The other end of the motor shaft 9 extends into the rear cover 5 and is eccentrically aligned with the rear cover 5. The transmission structure is connected, and the brushless motor control board controls the coil to generate a magnetic field, which provides power to the outer rotor 11 of the motor. After the brushless outer rotor motor starts, the rotation of the motor shaft 9 drives the eccentric wheel 8 to rotate. The eccentric wheel 8 drives the connecting rod 6 to reciprocate in a direction perpendicular to the motor shaft, which drives the diaphragm 4 to compress the pump cavity, thereby cyclically increasing and decreasing the volume of the pump cavity. The pump cavity, together with the inlet umbrella 15 and the outlet umbrella 16, forms a unidirectional air passage. The change in the volume of the pump cavity causes the gas to flow from the inlet channel of the pump body to the outlet channel of the pump body, and the air pump performs the pumping work.

[0025] In a diaphragm air pump provided in one embodiment of the present invention, the eccentric transmission structure includes an eccentric wheel 8 and a connecting rod 6 fixed on a motor shaft 9. One end of the connecting rod 6 is connected to the eccentric wheel 8 through a ball bearing 7, and the other end of the connecting rod 6 is fixedly connected to the diaphragm 4 through a fastener.

[0026] In a diaphragm air pump provided in one embodiment of the present invention, the fasteners include a diaphragm fixing plate 3 and a connecting rod screw 10, wherein the connecting rod screw 10 passes through the diaphragm fixing plate 3 and is threadedly connected to the connecting rod 6.

[0027] In a diaphragm air pump provided in one embodiment of the present invention, a top cover 1 is ultrasonically welded onto the valve plate 2 to prevent air leakage.

[0028] One embodiment of this utility model also provides an electric breast pump, including the diaphragm air pump described above.

[0029] In practical use, after the brushless external rotor motor starts, the rotation of the motor shaft 9 drives the eccentric wheel 8 to rotate. The eccentric wheel 8 drives the connecting rod 6 to reciprocate in a direction perpendicular to the motor shaft, which drives the diaphragm 4 to compress the pump chamber, thereby cyclically increasing and decreasing the volume of the pump chamber. The pump chamber, together with the inlet umbrella 15 and the outlet umbrella 16, forms a unidirectional air passage. The change in the volume of the pump chamber causes the gas to flow from the inlet channel of the pump body to the outlet channel of the pump body, and the air pump performs the pumping work.

[0030] The following points need to be explained:

[0031] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0032] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure can be combined with each other.

[0033] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A diaphragm gas pump characterized in that, Includes valve plate (2), rear cover (5), bottom cover (13), brushless external rotor motor and eccentric transmission structure; The valve plate (2) is installed on the rear cover (5). The pump chamber of the valve plate (2) is provided with a diaphragm (4). The air inlet channel and the air outlet channel of the valve plate (2) are respectively provided with an air inlet umbrella (15) and an air outlet umbrella (16). The bottom cover (13) is fixed on the rear cover (5). The brushless external rotor motor is integrated with the bottom cover (13) and drives the diaphragm (4) to reciprocate in the pump chamber through the eccentric transmission structure.

2. The diaphragm gas pump of claim 1, wherein: The brushless external rotor motor includes a motor shaft (9), an external rotor (11), a motor stator (12), a bearing (14), and a brushless motor control board. The motor stator (12), the bearing (14), and the brushless motor control board are riveted to the bottom cover (13). The motor shaft (9) is installed inside the bottom cover (13) through the bearing (14). One end of the motor shaft (9) passes through the bearing (14) and is fixedly connected to the external rotor (11). The other end of the motor shaft (9) extends into the rear cover (5) and is connected to the eccentric transmission structure.

3. The membrane gas pump of claim 2, wherein: The eccentric transmission structure includes an eccentric wheel (8) and a connecting rod (6) fixed on the motor shaft (9). One end of the connecting rod (6) is connected to the eccentric wheel (8) through a ball bearing (7), and the other end of the connecting rod (6) is fixedly connected to the diaphragm (4) through a fastener.

4. The membrane gas pump of claim 3, wherein: The fasteners include a diaphragm fixing plate (3) and a connecting rod screw (10), wherein the connecting rod screw (10) passes through the diaphragm fixing plate (3) and is threadedly connected to the connecting rod (6).

5. The diaphragm gas pump of claim 1, wherein: The valve plate (2) is ultrasonically welded with a top cover (1).

6. An electric breast pump characterized by: Includes the diaphragm air pump as described in any one of claims 1-5.

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