Miniature air pump with noise reduction structure

Abstract

The utility model discloses a miniature air pump with noise reduction structure, including motor and motor output end region installation has the noise reduction ventilation structure, the noise reduction ventilation structure includes base, and motor is fixed mounting close to output end shell and base, and motor output end rotation penetrates the base center position, and the penetration end passes through the shaft coupling and connects the swing bar, and the base top installs the fixed seat, and the fixed seat top is equipped with the umbrella cover through the sealing washer, and the fixed seat is provided with four cover holes of rectangular setting, and the base is provided with eccentric wheel, and the fixed seat is located cover hole fixed and is fixed and is communicated with tower shape ventilation cover, and the swing bar top end is rotatably connected with eccentric wheel center position, and the eccentric wheel is fixedly covered and is installed with tower shape ventilation cover bottom, and the noise reduction effect aspect shows outstanding. The unique structure of tower shape ventilation cover increases the gas flow path and the contact area, effectively promotes the smooth airflow in and out, significantly reduces the turbulence and vortex generation, reduces the airflow noise from the source.

Description

Technical Field

[0001] This utility model relates to the field of micro air pump technology, specifically a micro air pump with a noise reduction structure. Background Technology

[0002] With the accelerating trend of miniaturization and intelligence in electronic devices, micro air pumps, as a highly efficient gas delivery and pressurization device, are widely used in various fields such as massage instruments, atomizers, and car lumbar supports.

[0003] When existing micro air pumps are in operation, their internal gas flow channels use perforated ventilation. The pulse noise caused by single-hole ventilation can cause significant noise problems. This noise not only disturbs the tranquility of the surrounding environment, but also causes auditory discomfort to people. Utility Model Content

[0004] The purpose of this invention is to provide an air-dispersing cushion design inside the umbrella canopy, which allows the gas to be more evenly dispersed after entering through the air holes, further reducing the instability of the airflow. The high-elasticity rubber material used can also absorb some vibration energy, thus helping to improve the noise reduction effect. The miniature air pump with noise reduction structure can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a miniature air pump with a noise reduction structure, including a motor and a noise reduction ventilation structure installed in the motor output area. The noise reduction ventilation structure includes a base, a motor housing near the output end fixedly installed with the base, the motor output end rotating through the center of the base, and the through end connected to a swing arm via a coupling. A fixed seat is installed on the top of the base, and a cover is installed on the top of the fixed seat via a sealing gasket. The fixed seat has four rectangular hood holes. An eccentric wheel is provided inside the base. The fixed seat is located inside the hood holes and is fixedly connected to a tower-shaped ventilation hood. The top of the swing arm is rotatably connected to the center of the eccentric wheel, and the eccentric wheel is fixedly sleeved and installed on the bottom of the tower-shaped ventilation hood. The base, mounting base, sealing gasket, and umbrella cover are stacked sequentially and connected in a detachable manner via snap-fit ​​components.

[0006] Preferably, an air diffuser is installed on the top of the sealing gasket, the air diffuser is located inside the umbrella cover, and four rectangularly distributed air holes are opened on the sealing gasket and the air diffuser. An air nozzle is fixedly connected at the center of the top of the umbrella cover.

[0007] Preferably, the bottom end of the sealing gasket is fixedly connected to four first positioning rods arranged in a cross shape, the fixing seat is provided with matching lower positioning holes, the top end of the sealing gasket is fixedly connected to two second positioning rods, and the top of the air diffuser is provided with matching upper positioning holes.

[0008] Preferably, the base has a stepped concave shape near the top inner side, and the bottom of the fixing seat is fixedly connected with a matching frame-shaped protrusion.

[0009] Preferably, the snap-fit ​​assembly includes a snap rod, with a curved section fixedly connected to the top end of the snap rod and a hook section fixedly connected to the bottom end. The sealing gasket has a first side groove at the center of each of its four side walls, and the base, the fixing seat, and the umbrella cover have a second side groove at the center of each of their four side sides. The bottom of the base has a hook groove communicating with the second side groove, and the top of the umbrella cover has a curved groove communicating with the second side groove.

[0010] Preferably, the top end of the lever is integrally formed with the curved section, and the bottom end is integrally formed with the hook section.

[0011] Compared with existing technologies, the advantages of this invention are: superior noise reduction performance. The unique structure of the tower-shaped ventilation hood increases the gas flow path and contact area, effectively promoting smooth airflow and significantly reducing the generation of turbulence and eddies, thus reducing airflow noise at the source. The tight seal between the canopy and the fixed base through the sealing gasket not only ensures gas transmission efficiency but also effectively blocks and absorbs the noise generated inside the air pump due to mechanical movement and airflow vibration from propagating to the outside. The symmetrical arrangement of the four rectangular hood holes and the corresponding tower-shaped ventilation hood makes the gas intake and exhaust process more uniform and coordinated, avoiding pulse noise caused by single-hole ventilation. Through multi-channel diversion and buffering, the overall noise level is reduced. In addition, the air-dispersing pad design inside the canopy allows the gas to be more evenly dispersed after entering through the air holes, further reducing airflow instability. The high-elasticity rubber material used can also absorb some vibration energy, further enhancing the noise reduction effect. The snap-fit ​​assembly design ensures a secure and reliable connection between the base, mounting bracket, sealing gasket, and canopy, while also facilitating disassembly and maintenance. When cleaning or replacing parts inside the air pump is required, simply remove the lever from its corresponding slot to easily separate the components, greatly improving ease of use and maintenance efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention after overall explosive disassembly. Figure 3 This is a three-dimensional enlarged structural diagram of the fixing seat, sealing gasket, and air venting gasket in this utility model; Figure 4 This is a structural schematic diagram of the present invention from the overall frontal view. Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction; Figure 6This is a three-dimensional enlarged structural diagram of the curved section in this utility model.

[0013] In the diagram: 1. Motor; 2. Noise-reducing ventilation structure; 21. Base; 22. Coupling; 23. Swing rod; 24. Eccentric wheel; 25. Tower-shaped ventilation hood; 26. Fixed seat; 27. Sealing gasket; 28. Air diffuser; 29. ​​Umbrella cover; 271. First positioning rod; 272. Second positioning rod; 273. Upper positioning hole; 274. Lower positioning hole; 275. Cover hole; 276. Air hole; 277. Air nozzle; 3. Snap-fit ​​assembly; 31. Clip rod; 32. First side groove; 33. Second side groove; 34. Bending groove; 35. Hook groove; 36. Bending section; 37. Hook section. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 6 The illustration shows a miniature air pump with a noise reduction structure, including a motor 1 and a noise reduction ventilation structure 2 installed at the output end of the motor 1. The noise reduction ventilation structure 2 includes a base 21. The outer shell of the motor 1 near its output end is fixedly installed to the base 21. The output end of the motor 1 rotatably passes through the center of the base 21, and the passing end is connected to a swing arm 23 via a coupling 22. A fixed seat 26 is installed on the top of the base 21. A canopy 29 is installed on the top of the fixed seat 26 via a sealing gasket 27. The fixed seat 26 has four rectangular openings 275. An eccentric wheel 24 is provided inside the base 21. The fixed seat 26 is fixedly connected to a tower-shaped ventilation hood 25 at each of the openings 275. The top of the swing arm 23 is rotatably connected to the center of the eccentric wheel 24. The eccentric wheel 24 and the bottom of the tower-shaped ventilation hood 25 are fixedly fitted together.

[0016] It is worth noting that when motor 1 starts, its output end drives the rocker arm 23 to move via coupling 22. The top of the rocker arm 23 is rotatably connected to the center of the eccentric wheel 24, so the movement of the rocker arm 23 will drive the eccentric wheel 24 to rotate eccentrically. Since the eccentric wheel 24 is fixedly installed on the bottom of the tower-shaped vent 25, the eccentric rotation of the eccentric wheel 24 will cause the tower-shaped vent 25 to produce a periodic up-and-down reciprocating motion.

[0017] The tower-shaped vent 25 is fixedly connected to the rectangular vent 275 in the fixed base 26, and the top of the fixed base 26 is fitted with a canopy 29 via a sealing gasket 27. This makes the tower-shaped vent 25, the fixed base 26, the sealing gasket 27, and the canopy 29 together form a relatively closed cavity structure. When the tower-shaped vent 25 moves upward, its internal space increases and the air pressure decreases, thereby drawing in gas from the outside through the vent 275; when the tower-shaped vent 25 moves downward, its internal space decreases and the air pressure increases, expelling gas from the cavity, thus realizing the ventilation function of the air pump.

[0018] In terms of noise reduction, the design of the tower-shaped ventilation hood 25 increases the gas flow path and contact area, making the airflow smoother during entry and exit, reducing the generation of turbulence and eddies, thereby reducing airflow noise. At the same time, the umbrella cover 29 and the fixed base 26 are sealed by the sealing gasket 27, which not only ensures the efficiency of gas transmission, but also effectively blocks and absorbs the noise generated inside the air pump due to mechanical movement and airflow vibration from propagating to the outside. The symmetrical arrangement of the four rectangular hood holes 275 and the corresponding tower-shaped ventilation hoods 25 makes the gas intake and exhaust process more uniform and coordinated, avoiding the pulse noise generated when venting through a single hole. Through multi-channel diversion and buffering, the overall noise level is effectively reduced.

[0019] Please see Figure 1 , Figure 2 and Figure 3 An air diffuser 28 is mounted on top of the sealing gasket 27 and is located inside the umbrella cover 29. Four rectangularly distributed air holes 276 are formed on both the sealing gasket 27 and the air diffuser 28. A gas nozzle 277 is fixedly connected to the center of the top of the umbrella cover 29 and is connected to an external gas transmission pipe to guide the gas in and out. The special design of the air diffuser 28 allows the gas to be more evenly dispersed after entering the umbrella cover 29 through the air holes 276, further reducing airflow instability and noise generation. Simultaneously, the air diffuser 28 is made of a highly elastic rubber material, which can absorb some vibration energy when gas passes through, thus playing a role in noise reduction.

[0020] Please refer to Figure 1 , Figure 2 and Figure 3 The bottom end of the sealing gasket 27 is fixedly connected to four first positioning rods 271 arranged in a cross pattern. The fixing base 26 is provided with matching lower positioning holes 274. The top end of the sealing gasket 27 is fixedly connected to two second positioning rods 272. The top of the air venting pad 28 is provided with matching upper positioning holes 273. The matching arrangement of the first positioning rod 271 with the lower positioning hole 274 and the second positioning rod 272 with the upper positioning hole 273 enables the sealing gasket 27 and the air diffuser 28 to be quickly and accurately positioned during installation, ensuring the installation accuracy between the components. This precise positioning method not only improves assembly efficiency but also ensures that the sealing gasket 27 and the air diffuser 28 will not shift during operation, thereby maintaining good sealing and air diffusion performance, and further ensuring the overall noise reduction effect and gas transmission stability of the air pump.

[0021] See Figure 2 The base 21 has a stepped concave shape near the top inner side, and the bottom of the fixed seat 26 is fixedly connected with a matching frame-shaped protrusion and a stepped concave shape, which further enhances the connection stability between the fixed seat 26 and the base 21 and effectively prevents the fixed seat 26 from becoming loose or shifting during operation.

[0022] See Figure 4 and Figure 5 The base 21, the fixing seat 26, the sealing gasket 27, and the umbrella cover 29 are stacked in sequence and are detachably connected by the snap-fit ​​assembly 3. The snap-fit ​​assembly 3 includes a snap rod 31, with a bent section 36 fixedly connected to the top end of the snap rod 31 and a hook section 37 fixedly connected to the bottom end. The sealing gasket 27 has a first side groove 32 at the center of each of its four side walls. The base 21, the fixing seat 26, and the umbrella cover 29 have a second side groove 33 at the center of each of their four side sides. The bottom of the base 21 has a hook groove 35 that communicates with the second side groove 33, and the top of the umbrella cover 29 has a bent groove 34 that communicates with the second side groove 33.

[0023] During installation, the outer wall of the clamping rod 31 is sequentially aligned with the second side groove 33 on the base 21, the fixing seat 26, and the sealing gasket 27, as well as the first side groove 32 on the sealing gasket 27, and finally snaps into the hook groove 35 at the bottom of the base 21. Simultaneously, the curved section 36 at the top of the clamping rod 31 snaps into the curved groove 34 at the top of the umbrella cover 29, thus achieving a stable connection between the base 21, the fixing seat 26, the sealing gasket 27, and the umbrella cover 29. This snap-fit ​​assembly 3 design not only makes the connection between the components more robust and reliable but also facilitates disassembly and maintenance. When cleaning or replacing parts inside the air pump is required, simply remove the clamping rod 31 from the corresponding groove to easily separate the components, improving ease of use and maintenance efficiency.

[0024] See Figure 4 and Figure 5 The top end of the locking rod 31 is integrally formed with the bent section 36, and the bottom end is integrally formed with the hook section 37. The locking rod 31 is made of stainless steel. Stainless steel, with its high strength and hardness, ensures that the clamp rod 31 is not easily deformed or damaged during long-term use, thus guaranteeing the connection stability of the clamping assembly 3. Simultaneously, stainless steel also possesses excellent corrosion resistance, resisting rust and corrosion even in harsh environments, extending the service life of the clamp rod 31. Furthermore, the one-piece molding design eliminates gaps between the clamp rod 31 and the bending section 36 and hook section 37, reducing stress concentration points and further enhancing the overall strength and reliability of the clamp rod, providing a strong guarantee for the secure connection between the various components of the air pump.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature air pump with a noise reduction structure, comprising a motor (1) and a noise reduction ventilation structure (2) installed in the output area of ​​the motor (1), characterized in that, The noise reduction ventilation structure (2) includes a base (21), a motor (1) is fixedly installed near the output end housing and the base (21), the output end of the motor (1) rotates through the center position of the base (21), and the through end is connected to the swing rod (23) through the coupling (22), a fixed seat (26) is installed on the top of the base (21), and an umbrella cover (29) is installed on the top of the fixed seat (26) through the sealing gasket (27), the fixed seat (26) has four rectangular hood holes (275), an eccentric wheel (24) is provided in the base (21), the fixed seat (26) is fixedly connected to the tower-shaped ventilation hood (25) in the hood holes (275), the top of the swing rod (23) is rotatably connected to the center position of the eccentric wheel (24), and the eccentric wheel (24) is fixedly sleeved and installed at the bottom of the tower-shaped ventilation hood (25); The base (21), the fixing seat (26), the sealing gasket (27) and the umbrella cover (29) are stacked in sequence and are detachably connected by the snap-fit ​​assembly (3).

2. A miniature air pump with a noise reduction structure according to claim 1, characterized in that: An air diffuser (28) is installed on the top of the sealing gasket (27). The air diffuser (28) is located inside the umbrella cover (29). Four rectangular air holes (276) are provided on the sealing gasket (27) and the air diffuser (28). The air nozzle (277) is fixedly connected to the center of the top of the umbrella cover (29).

3. A miniature air pump with a noise reduction structure according to claim 2, characterized in that: The bottom of the sealing gasket (27) is fixedly connected with four cross-shaped first positioning rods (271), the fixed seat (26) is provided with matching lower positioning holes (274), the top of the sealing gasket (27) is fixedly connected with two second positioning rods (272), and the top of the air diffuser (28) is provided with matching upper positioning holes (273).

4. A miniature air pump with a noise reduction structure according to claim 1, characterized in that: The base (21) is stepped and concave near the top inner side, and the bottom of the fixing seat (26) is fixedly connected with a matching frame-shaped protrusion.

5. A miniature air pump with a noise reduction structure according to claim 1, characterized in that: The snap-fit ​​assembly (3) includes a snap rod (31), a bent section (36) is fixedly connected to the top of the snap rod (31), and a hook section (37) is fixedly connected to the bottom. The sealing gasket (27) has a first side groove (32) at the center of each of its four side walls. The base (21), the fixing seat (26), and the umbrella cover (29) have a second side groove (33) at the center of each of their four sides. The bottom of the base (21) has a hook groove (35) that communicates with the second side groove (33), and the top of the umbrella cover (29) has a bent groove (34) that communicates with the second side groove (33).

6. A miniature air pump with a noise reduction structure according to claim 5, characterized in that: The top end of the lever (31) is integrally formed with the curved section (36), and the bottom end is integrally formed with the hook section (37).

Images