A miniature air pump

Abstract

This invention relates to the field of micro air pump technology, specifically a micro air pump, mainly comprising a motor, a fixed housing mounted on the top surface of the motor, a diaphragm seat mounted on the top surface of the fixed housing, a connecting mechanism positioned above the motor, and a filtering mechanism disposed inside the fixed housing. Starting the motor drives the eccentric wheel to rotate, causing the rotating rod to rotate synchronously, which in turn causes the fixed sleeve and the swing frame to swing, pushing the push rod to pull the diaphragm in reciprocating motion. Gas is drawn into the pump chamber through the inlet and through-hole, transported through the internal channels of the connecting housing and the sealing cover, and finally discharged from the outlet, completing the gas suction and delivery process. During transmission, the built-in rolling groove and ball bearing structure transform the original sliding friction into rolling friction, effectively controlling the clearance between components, preventing a decrease in transmission accuracy, reducing equipment jamming and abnormal noise, significantly reducing component wear and tear, and effectively extending the overall service life of the micro air pump.

Description

Technical Field

[0001] This invention relates to the field of micro air pump technology, specifically to a micro air pump. Background Technology

[0002] Miniature air pumps are miniaturized gas delivery power devices, primarily featuring a diaphragm structure and powered by a DC motor. The motor drives an eccentric wheel to rotate, converting rotary motion into reciprocating motion, which in turn drives the diaphragm inside the pump to repeatedly deform. Combined with the alternating opening and closing of inlet and outlet check valves, this completes the gas suction and pressurization delivery. The device has a compact overall structure and features low noise, low power consumption, oil-free operation, and stable performance. It can adapt to various working modes such as inflation and negative pressure extraction. It is commonly used in medical nebulizers, blood pressure monitors, small beauty devices, household inflatable products, and various precision testing instruments, serving as a core component of the gas circuit system in small devices.

[0003] During the operation of the miniature air pump, the motor drives the eccentric wheel and the rotating rod to rotate synchronously. The outer wall of the rotating rod is in contact with the inner wall of the fixed sleeve for transmission, which in turn drives the circular sleeve and the swing frame to swing back and forth. This drives the push rod to pull the diaphragm to move back and forth, thereby completing the gas suction and discharge operation. Under high-speed operation, the rotating rod continuously slides in contact with the inner wall of the circular sleeve. The contact surface between the two will generate severe friction and wear. Long-term high-frequency friction can easily cause the wear of the rod and the inner wall of the circular sleeve to accelerate, which will cause the transmission clearance to increase continuously, the transmission accuracy to decrease, and problems such as running jamming and abnormal noise to occur. Ultimately, it will significantly shorten the overall service life of the miniature air pump. Summary of the Invention

[0004] The purpose of this invention is to provide a miniature air pump to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A miniature air pump includes: a motor; a fixed housing mounted on the top surface of the motor; a diaphragm mount mounted on the top surface of the fixed housing; a diaphragm mounted on the top surface of the diaphragm mount; a connecting housing mounted on the top surface of the diaphragm; and a sealing cover mounted on the top surface of the connecting housing. The pump also includes:

[0007] A connecting mechanism is located above the motor. The connecting mechanism includes a swing frame located inside the fixed housing, an eccentric wheel located below the swing frame, and a rotating rod mounted on the top surface of the eccentric wheel.

[0008] The filter mechanism is located inside the fixed housing. The filter mechanism includes a circular frame that is fixedly installed on the inner wall of the fixed housing. The outer wall of the circular frame has an installation groove, and a filter plate is movably installed on the inner wall of the installation groove.

[0009] Preferably, the outer wall of the fixed shell is provided with an air inlet, the top surface of the sealing cover is provided with an air outlet, and the sealing cover is fixedly connected to the connecting shell by bolts.

[0010] Preferably, three limiting tubes are fixedly installed on the inner wall of the fixed shell, and three limiting rods are fixedly installed on the inner wall of the membrane seat, with the lower outer wall of the limiting rods movably connected to the inner wall of the limiting tubes.

[0011] Preferably, the upper end of the motor output rod rotates through the fixed shell and is fixedly connected to the bottom surface of the eccentric wheel. The lower end of the diaphragm is inserted into the diaphragm seat, driving the bottom surface of the diaphragm to install three push rods. The outer wall of the push rod is connected to the inner wall of the swing frame.

[0012] Preferably, a fixed sleeve is fixedly installed on the bottom surface of the swing frame, and multiple rolling grooves are provided on the outer wall of the rotating rod. Balls are rolledly installed on the inner wall of the rolling grooves, and the outer wall of the ball is rolledly connected to the inner wall of the fixed sleeve.

[0013] Preferably, the membrane seat has three through holes, and the diaphragm has three blocking holes. The three blocking holes correspond to the three through holes. A partition strip is fixedly installed on the inner wall of the connecting shell, which divides the inner wall of the connecting shell into three chambers. The bottom surface of the partition strip abuts against the top surface of the diaphragm.

[0014] Preferably, the circular frame has two arc-shaped grooves inside, a sliding block is slidably installed on the inner wall of the arc-shaped groove, an elastic element is fixedly installed on the bottom surface of the sliding block, and the other end of the elastic element is fixedly connected to the inner wall of one end of the arc-shaped groove.

[0015] Preferably, a blocking strip is fixedly installed on the top surface of the sliding block, and the other end of the blocking strip slides through the inner wall of the arc-shaped groove and extends into the interior of the mounting groove.

[0016] Preferably, two protrusions are fixedly installed on the outer wall of the filter plate, and the blocking strip is set in an arc shape, with the inner wall of the blocking strip abutting against the side of the protrusion.

[0017] Preferably, the arc-shaped groove is provided with a through groove, and a push block is fixedly installed on the side of the sliding block, with the side of the push block slidably connected to the inner wall of the through groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] After the motor is started, the eccentric wheel is driven to rotate continuously, which in turn drives the rotating rod to rotate synchronously. The rotating rod, in conjunction with the fixed sleeve and the swing frame, swings, causing the push rod to pull the diaphragm back to its original position. Gas is drawn into the pump chamber through the air inlet and through hole, and then transported through the internal channels of the connecting shell and the sealing cover. Finally, it is stably discharged from the air outlet, realizing the gas suction and transportation operation. During the rotation of the rotating rod, the ball bearings can roll freely inside the rolling groove thanks to the rolling groove and ball bearing cooperation structure. When the rotating rod drives the fixed sleeve and the swing frame to swing, the ball bearings roll against the inner wall of the fixed sleeve, effectively converting sliding friction into rolling friction. This reduces the gap caused by sliding friction, avoids the reduction of transmission accuracy, and also reduces the occurrence of faults such as running jams and abnormal noises. It effectively reduces the wear of components and significantly improves the service life of the micro air pump.

[0020] By manually pushing the push block, the sliding block can be moved along the inner wall of the arc-shaped groove. During the movement of the sliding block, the elastic element is squeezed, and at the same time, the blocking strip is moved towards one side of the arc-shaped groove, so that the filter plate can be easily removed from the installation groove. After cleaning and maintenance, the filter plate is put back into the installation groove, the push block is released, the compressed elastic element springs back to its original position, pushes the sliding block to move in the opposite direction, and then moves the blocking strip back into place, so that its inner side is tightly against the side wall of the protrusion, firmly locking the protrusion and the filter plate, achieving a stable assembly. The filter plate can effectively filter dust and particulate impurities in the intake air, preventing dirt from entering the pump body and clogging or damaging the diaphragm components, ensuring stable operation of the air pump, and extending the service life of the equipment. This disassembly and assembly structure is easy to operate, and the filter plate can be disassembled for cleaning or replacement, making daily maintenance and use convenient. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded view of the three-dimensional structure of the present invention;

[0023] Figure 3 This is an exploded view of the bottom three-dimensional structure of the present invention;

[0024] Figure 4 This is a schematic cross-sectional view of the three-dimensional structure of the fixed shell of the present invention;

[0025] Figure 5 This is an exploded view of the three-dimensional structure of the rotating rod of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the fixed shell of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the filter plate of the present invention;

[0028] Figure 8 This is a cross-sectional schematic diagram of the three-dimensional circular frame structure of the present invention.

[0029] In the picture:

[0030] 1. Motor; 101. Mounting housing; 102. Air inlet; 103. Diaphragm holder; 104. Diaphragm; 105. Connecting housing; 106. Sealing cover; 107. Air outlet;

[0031] 2. Connecting mechanism; 201. Limiting tube; 202. Limiting rod; 203. Eccentric wheel; 204. Rotating rod; 205. Rolling groove; 206. Ball bearing; 207. Fixing sleeve; 208. Swing frame; 209. Push rod; 210. Through hole one; 211. Barrier hole; 212. Separator strip;

[0032] 3. Filtering mechanism; 301. Circular frame; 302. Mounting groove; 303. Filter plate; 304. Protrusion; 305. Arc groove; 306. Sliding block; 307. Blocking strip; 308. Elastic element; 309. Through groove; 310. Push block. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0035] like Figures 1-8 As shown, this application provides a miniature air pump, including: a motor 1, a fixed housing 101 mounted on the top surface of the motor 1, a diaphragm seat 103 mounted on the top surface of the fixed housing 101, a diaphragm 104 mounted on the top surface of the diaphragm seat 103, a connecting housing 105 mounted on the top surface of the diaphragm 104, and a sealing cover 106 mounted on the top surface of the connecting housing 105.

[0036] Specifically, such as Figures 1-3 As shown, the outer wall of the fixed shell 101 is provided with an air inlet 102, and the top surface of the sealing cover 106 is provided with an air outlet 107. The sealing cover 106 is fixedly connected to the connecting shell 105 by bolts.

[0037] In this embodiment: the sealing cover 106 is fixedly connected to the connecting shell 105 by bolts, thereby firmly connecting the sealing cover 106. The air pump draws air from the air inlet 102 into the fixed shell 101, and the air is discharged from the air outlet 107 on the sealing cover 106.

[0038] The connecting mechanism 2 is located above the motor 1. The connecting mechanism 2 includes a swing frame 208 located inside the fixed shell 101. An eccentric wheel 203 is provided below the swing frame 208. A rotating rod 204 is installed on the top surface of the eccentric wheel 203.

[0039] Specifically, such as Figure 6 As shown, three limiting tubes 201 are fixedly installed on the inner wall of the fixed shell 101, and three limiting rods 202 are fixedly installed on the inner wall of the membrane seat 103. The lower outer wall of the limiting rod 202 is movably connected to the inner wall of the limiting tube 201.

[0040] In this embodiment: when the lower outer wall of the limiting rod 202 is movably connected to the inner wall of the limiting tube 201, and the fixing shell 101 and the membrane seat 103 are installed and connected, the lower outer wall of the limiting rod 202 and the limiting tube 201 limit the fixing shell 101 and the membrane seat 103, so that the connection between the fixing shell 101 and the membrane seat 103 is more stable and less prone to displacement.

[0041] Specifically, such as Figures 4-5 As shown, the upper end of the output rod of motor 1 rotates through the fixed shell 101 and is fixedly connected to the bottom surface of the eccentric wheel 203. The lower end of the diaphragm 104 is inserted into the diaphragm seat 103, which drives the bottom surface of the diaphragm 104 to install three push rods 209. The outer wall of the push rod 209 is connected to the inner wall of the swing frame 208.

[0042] In this embodiment: the motor 1 drives the eccentric wheel 203 to rotate, the membrane seat 103 supports and fixes the diaphragm 104, and when the swing frame 208 swings, it drives the push rod 209 and the diaphragm 104 to move back and forth. The diaphragm 104 moves back and forth, thereby performing air intake and exhaust.

[0043] Specifically, such as Figure 5 As shown, a fixed sleeve 207 is fixedly installed on the bottom surface of the swing frame 208, and multiple rolling grooves 205 are provided on the outer wall of the rotating rod 204. Rolling balls 206 are rolledly installed on the inner wall of the rolling grooves 205, and the outer wall of the rolling balls 206 is rolledly connected to the inner wall of the fixed sleeve 207.

[0044] In this embodiment: a ball bearing 206 is rolled on the inner wall of the rolling groove 205. The outer wall of the ball bearing 206 is rolledly connected to the inner wall of the fixed sleeve 207. When the rotating rod 204 drives the fixed sleeve 207 and the swing frame 208 to swing, the ball bearing 206 can roll freely inside the rolling groove 205 due to the cooperation structure between the rolling groove 205 and the ball bearing 206. When the rotating rod 204 drives the fixed sleeve 207 and the swing frame 208 to swing, the ball bearing 206 rolls against the inner wall of the fixed sleeve 207, effectively converting sliding friction into rolling friction. This reduces the gap caused by sliding friction, avoids a decrease in transmission accuracy, and reduces the occurrence of malfunctions such as running jams and abnormal noises. It also effectively reduces the wear of components and significantly improves the service life of the micro air pump.

[0045] Specifically, such as Figures 2-3 As shown, the membrane seat 103 is provided with three through holes 210, and the diaphragm 104 is provided with three barrier holes 211. The three barrier holes 211 correspond to the three through holes 210 respectively. A partition strip 212 is fixedly installed on the inner wall of the connecting shell 105. The partition strip 212 divides the inner wall of the connecting shell 105 into three chambers. The bottom surface of the partition strip 212 abuts against the top surface of the diaphragm 104.

[0046] In this embodiment: the inner wall of the connecting shell 105 is divided into three chambers by the partition strip 212. The bottom surface of the partition strip 212 abuts against the top surface of the diaphragm 104. When the three push rods 209 and the diaphragm 104 swing back and forth, the three chambers alternately perform air intake and exhaust to ensure the working efficiency of the air pump.

[0047] The filter mechanism 3 is located inside the fixed shell 101. The filter mechanism 3 includes a circular frame 301 fixedly installed on the inner wall of the fixed shell 101. The outer wall of the circular frame 301 is provided with an installation groove 302. A filter plate 303 is movably installed on the inner wall of the installation groove 302.

[0048] Specifically, such as Figures 6-8 As shown, the circular frame 301 has two arc-shaped grooves 305 inside. A sliding block 306 is slidably installed on the inner wall of the arc-shaped groove 305. An elastic element 308 is fixedly installed on the bottom surface of the sliding block 306. The other end of the elastic element 308 is fixedly connected to the inner wall of one end of the arc-shaped groove 305.

[0049] In this embodiment: the arc groove 305 is used to limit the sliding block 306, so that the sliding block 306 moves more stably; the elastic element 308 applies elastic force to the sliding block 306, so that the sliding block 306 has a continuous thrust.

[0050] Specifically, such as Figure 8 As shown, a blocking strip 307 is fixedly installed on the top surface of the sliding block 306, and the other end of the blocking strip 307 slides through the inner wall of the arc-shaped groove 305 and extends into the interior of the mounting groove 302.

[0051] In this embodiment: when the sliding block 306 moves, it drives the blocking strip 307 to move, thereby adjusting the position of the blocking strip 307.

[0052] Specifically, such as Figures 7-8 As shown, two protrusions 304 are fixedly installed on the outer wall of the filter plate 303, and the blocking strip 307 is set in an arc shape, with the inner wall of the blocking strip 307 abutting against the side of the protrusions 304.

[0053] In this embodiment: the inner wall of the blocking strip 307 abuts against the side of the protrusion 304, and the blocking strip 307 presses and fixes the protrusion 304, thereby further fixing the filter plate 303.

[0054] Specifically, such as Figures 7-8 As shown, the arc-shaped groove 305 is provided with a through groove 309, and the sliding block 306 is fixedly installed with a push block 310 on its side. The side of the push block 310 is slidably connected to the inner wall of the through groove 309.

[0055] In this embodiment: When the pusher 310 is manually pushed, it causes the sliding block 306 and the blocking strip 307 to rotate, thereby opening the blocking strip 307 so that the filter plate 303 can be taken out.

[0056] The specific solution is as follows: Motor 1 is turned on, driving the eccentric wheel 203 to rotate continuously, which in turn drives the rotating rod 204 to rotate synchronously. The rotating rod 204, in conjunction with the fixed sleeve 207 and the swing frame 208, swings, causing the three push rods 209 to pull the diaphragm 104 to move back and forth alternately. Gas is continuously drawn into the pump chamber through the inlet 102 and through hole 210, then transported through the internal channels of the connecting shell 105 and the sealing cover 106, and finally stably discharged from the outlet 107, realizing gas suction and transportation operations. During the rotation of the rotating rod 204, relying on the internal structure of the rolling groove 205 and the ball bearing 206, the ball bearing 206 can roll freely inside the rolling groove 205. When the rotating rod 204 drives the fixed sleeve 207 and the swing frame 208 to swing, the ball bearing 206 rolls against the inner wall of the fixed sleeve 207, effectively converting sliding friction into rolling friction. This reduces the gap caused by sliding friction, avoids a decrease in transmission accuracy, and also reduces the occurrence of malfunctions such as running jams and abnormal noises, effectively reducing... The low wear of components significantly extends the service life of the miniature air pump. By manually pushing the pusher 310, the sliding block 306 can be moved along the inner wall of the arc-shaped groove 305. During the movement of the sliding block 306, the elastic element 308 is compressed, and at the same time, the blocking strip 307 is moved towards one side of the arc-shaped groove 305, so that the filter plate 303 can be easily removed from the mounting groove 302. After cleaning and maintenance, the filter plate 303 is put back into the mounting groove 302, the pusher 310 is released, and the compressed elastic element 308 rebounds. The reset mechanism pushes the sliding block 306 to move in the opposite direction, thereby causing the blocking strip 307 to return to its original position, so that its inner side is tightly attached to the side wall of the protrusion 304, firmly locking the protrusion 304 and the filter plate 303, achieving a stable assembly. The filter plate 303 can effectively filter dust and particulate impurities in the intake air, preventing dirt from entering the pump body and clogging or damaging the components of the diaphragm 104, ensuring stable operation of the air pump, and extending the service life of the equipment. This disassembly and assembly structure is easy to operate, and the filter plate 303 can be disassembled for cleaning or replacement, making daily maintenance and use relatively convenient.

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0058] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A miniature air pump, comprising: A motor (1), wherein a fixed housing (101) is mounted on the top surface of the motor (1), a diaphragm seat (103) is mounted on the top surface of the fixed housing (101), a diaphragm (104) is mounted on the top surface of the diaphragm seat (103), a connecting housing (105) is mounted on the top surface of the diaphragm (104), and a sealing cover (106) is mounted on the top surface of the connecting housing (105), characterized in that it further comprises: The connecting mechanism (2) is located above the motor (1). The connecting mechanism (2) includes a swing frame (208) located inside the fixed shell (101). An eccentric wheel (203) is provided below the swing frame (208). A rotating rod (204) is installed on the top surface of the eccentric wheel (203). The filter mechanism (3) is located inside the fixed shell (101). The filter mechanism (3) includes a circular frame (301) fixedly installed on the inner wall of the fixed shell (101). The outer wall of the circular frame (301) is provided with an installation groove (302). A filter plate (303) is movably installed on the inner wall of the installation groove (302).

2. A miniature air pump according to claim 1, characterized in that, The outer wall of the fixed shell (101) is provided with an air inlet (102), and the top surface of the sealing cover (106) is provided with an air outlet (107). The sealing cover (106) is fixedly connected to the connecting shell (105) by bolts.

3. A miniature air pump according to claim 1, characterized in that, Three limiting tubes (201) are fixedly installed on the inner wall of the fixed shell (101), and three limiting rods (202) are fixedly installed on the inner wall of the membrane seat (103). The lower outer wall of the limiting rod (202) is movably connected to the inner wall of the limiting tube (201).

4. A miniature air pump according to claim 3, characterized in that, The upper end of the output rod of the motor (1) rotates through the fixed shell (101) and is fixedly connected to the bottom surface of the eccentric wheel (203). The lower end of the diaphragm (104) is inserted into the diaphragm seat (103), which drives the bottom surface of the diaphragm (104) to install three push rods (209). The outer wall of the push rod (209) is connected to the inner wall of the swing frame (208).

5. A miniature air pump according to claim 4, characterized in that, The bottom surface of the swing frame (208) is fixedly installed with a fixed sleeve (207), and the outer wall of the rotating rod (204) is provided with multiple rolling grooves (205). The inner wall of the rolling groove (205) is rolled with a ball (206), and the outer wall of the ball (206) is rolledly connected to the inner wall of the fixed sleeve (207).

6. A miniature air pump according to claim 5, characterized in that, The membrane seat (103) is provided with three through holes (210), and the diaphragm (104) is provided with three barrier holes (211). The three barrier holes (211) correspond to the three through holes (210) respectively. A partition strip (212) is fixedly installed on the inner wall of the connecting shell (105). The partition strip (212) divides the inner wall of the connecting shell (105) into three chambers. The bottom surface of the partition strip (212) abuts against the top surface of the diaphragm (104).

7. A miniature air pump according to claim 1, characterized in that, The circular frame (301) has two arc-shaped grooves (305) inside. A sliding block (306) is slidably installed on the inner wall of the arc-shaped groove (305). An elastic element (308) is fixedly installed on the bottom surface of the sliding block (306). The other end of the elastic element (308) is fixedly connected to the inner wall of one end of the arc-shaped groove (305).

8. A miniature air pump according to claim 7, characterized in that, A blocking strip (307) is fixedly installed on the top surface of the sliding block (306). The other end of the blocking strip (307) slides through the inner wall of the arc groove (305) and extends into the interior of the mounting groove (302).

9. A miniature air pump according to claim 8, characterized in that, Two protrusions (304) are fixedly installed on the outer wall of the filter plate (303), and the blocking strip (307) is set in an arc shape. The inner wall of the blocking strip (307) abuts against the side of the protrusion (304).

10. A miniature air pump according to claim 9, characterized in that, The arc-shaped groove (305) is provided with a through groove (309), and a push block (310) is fixedly installed on the side of the sliding block (306). The side of the push block (310) is slidably connected to the inner wall of the through groove (309).

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