Miniature air pump for cold compress instrument

Abstract

The miniature air pump for the cold compress instrument comprises a valve assembly, a compression assembly and a driving assembly, the compression assembly comprises a base, a crank, a transmission shaft, a linkage rod and a diaphragm air bag, one end of the crank is fixedly connected with an output shaft of the driving assembly, the other end of the crank is rotationally connected with the linkage rod, and the diaphragm air bag is fixedly connected with the linkage rod. The valve assembly comprises an upper shell, a valve support and a diaphragm air bag support, the upper shell is provided with an air inlet and an air outlet, and the valve support and the diaphragm air bag support are provided with a first vent hole communicated with the air inlet and the base cavity and further provided with a second vent hole and a third vent hole which are communicated with the valve support cavity and the base cavity. The valve support is further provided with a plurality of small umbrella-shaped valves and large umbrella-shaped valves. The service life of the air pump can be effectively prolonged by adopting the base cavity as same as atmospheric pressure in the air suction process and adopting interference fit to fix the transmission shaft; the air circulation channel is large, and the air outlet is small, so that the working noise of the air pump is reduced.

Description

Technical Field

[0001] The utility model relates to the field of household medical appliances, in particular to a micro air pump for a cold compress instrument. Background Art

[0002] Cold compress can quickly lower the temperature of local skin tissue, thereby constricting blood vessels, reducing metabolism and blood flow in local tissue, and thus alleviating local inflammatory response; with the increase in people's life pressure and the improvement of health awareness, the demand for cold compress devices has grown rapidly. In the cold compress devices of existing medical and health care equipment and common household medical devices, the air pumps used generally have the problems of short service life, high noise, large size and high cost. In order to solve this series of problems, it is necessary to develop a micro air pump with long service life, low noise, small size and high production efficiency to meet the market demand of consumers and promote greater development of cold compress devices. Utility Model Content

[0003] The utility model provides a micro air pump for a cold compress instrument, so as to more accurately solve the problems of short service life, high noise, large volume and high cost of the existing air pump.

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model provides a micro air pump for a cold compress device, comprising a valve assembly, a drive assembly, and a compression assembly, wherein the valve assembly and the drive assembly are respectively fixedly connected to the compression assembly;

[0006] The compression assembly includes a base, a driving connecting rod module and an airbag module, wherein the base is provided with a base cavity for placing the driving connecting rod module and the airbag module, the driving connecting rod module includes a crank, a transmission shaft and a connecting rod, one end of the transmission shaft is fixedly connected to the crank, and the other end is rotatably connected to the connecting rod, and first placement holes are provided at both ends of the connecting rod; the airbag module includes a plurality of diaphragm airbags, and the diaphragm airbags are fixedly connected to the connecting rod;

[0007] The valve assembly includes an upper shell, a valve bracket and a diaphragm airbag bracket, the upper shell and the diaphragm airbag bracket are fixedly connected to the valve bracket respectively; the upper shell and the valve bracket are fixedly connected to form a valve bracket cavity, the upper shell is provided with an air inlet and an air outlet, the valve bracket and the diaphragm airbag bracket are provided with a first air vent connected to the air inlet and the base cavity, the valve bracket and the diaphragm airbag bracket are also provided with a second air vent and a third air vent connected to the valve bracket cavity and the base cavity, the valve bracket is also provided with a plurality of small umbrella valves and a large umbrella valve, after the gas enters from the air inlet, it passes through the first air vent, the base cavity, the second air vent or the third air vent and the small umbrella valve in sequence, and then enters the diaphragm airbag to realize suction, and the gas is discharged from the air outlet through the large umbrella valve to realize exhaust.

[0008] Furthermore, the driving assembly is provided with an output shaft, and a second placement hole is provided at the center position of the base, and the output shaft is fixedly connected to the crank through the second placement hole.

[0009] Furthermore, a third placement hole is provided at the center position of the base, and the base is fixedly connected to the driving assembly through the third placement hole.

[0010] Furthermore, the crank is provided with an inclined hole, the center position of the connecting rod is provided with an inner hole, one end of the transmission shaft is embedded in the inclined hole and fixedly connected to the crank, and the other end supports the steel ball and is rotatably connected to the connecting rod.

[0011] Furthermore, the diaphragm airbag is provided with a lead-out pin with two round balls, the lead-out pin passes through the first placement hole, and is fixedly connected to the linkage rod through the round balls.

[0012] Furthermore, the air inlet is fixedly connected to the upper shell, and the air inlet is provided with an annular protrusion at the lower end of the upper shell, and the first air vent is provided with an annular groove, and the annular protrusion is embedded in the annular groove.

[0013] Furthermore, one end of the first vent hole is connected to the air inlet, and the other end is connected to the base cavity.

[0014] Furthermore, the small umbrella-shaped valve is fixedly connected to the valve bracket.

[0015] Furthermore, the air outlet is fixedly connected to the upper shell, and the air outlet is provided with an annular protrusion at the lower end of the upper shell, and the large umbrella valve is provided with an annular groove, and the annular protrusion is embedded in the annular groove.

[0016] Furthermore, the large umbrella-shaped valve is fixedly connected to the valve bracket.

[0017] Beneficial effects of the utility model:

[0018] 1. The inclined hole of the crank proposed by the utility model adopts interference fit to tightly fit the transmission shaft, which reduces the friction between the transmission shaft and the crank and is beneficial to prolonging the service life of the air pump.

[0019] 2. One end of the first vent hole proposed in the utility model is connected to the air inlet, and the other end is connected to the base cavity. After the gas enters from the air inlet, it can only enter the base cavity through the first vent hole, so that the base cavity and the external air pressure are equal, avoiding vacuum damage to the compression component and improving the service life.

[0020] 3. The air outlet of the upper shell proposed by the utility model is designed to have a large gas flow channel and a small air outlet, which is beneficial to reducing the working noise of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall structural diagram of a micro air pump for a cold compress device in one embodiment of the utility model;

[0022] Figure 2 This is an exploded view of a micro air pump for a cold compress device in one embodiment of the utility model;

[0023] Figure 3 This is an overall structural diagram from another angle of a micro air pump for a cold compress device in one embodiment of the utility model;

[0024] Figure 4 For the utility model Figure 3 Schematic cross-sectional view at AA in the middle;

[0025] Figure 5 A top view of a base in one embodiment of the utility model;

[0026] Figure 6 This is a front view of a diaphragm airbag in one embodiment of the utility model;

[0027] Figure 7 A top view of a valve support in one embodiment of the utility model;

[0028] Figure 8 It is a top view of the upper shell in one embodiment of the utility model.

[0029] Explanation of reference numerals: drive assembly 1, base 2, output shaft 21, short screw 22, crank 3, inclined hole 31, transmission shaft 32, steel ball 33, connecting rod 4, inner hole 41, first placement hole 42, diaphragm airbag bracket 5, diaphragm airbag 6, lead-out pin 61, round ball 62, valve bracket 7, small umbrella valve 71, large umbrella valve 72, upper shell 8, air inlet 81, air outlet 82, connector 83, long screw 84, first air vent 9, second air vent 10, third air vent 11, small umbrella valve placement hole 711, air inlet circulation hole 712, large umbrella valve placement hole 721, air outlet circulation hole 722, second placement hole 23, third placement hole 24. DETAILED DESCRIPTION

[0030] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0031] Please refer to Figure 1-Figure 5 The utility model provides a micro air pump for a cold compress instrument, comprising a valve assembly, a drive assembly 1, and a compression assembly, wherein the valve assembly and the drive assembly 1 are respectively fixedly connected to the compression assembly;

[0032] The compression assembly includes a base 2, a driving connecting rod module and an airbag module. The base 2 is provided with a base 2 cavity for placing the driving connecting rod module and the airbag module. The driving connecting rod module includes a crank 3, a transmission shaft 32, and a connecting rod 4. One end of the transmission shaft 32 is fixedly connected to the crank 3, and the other end is rotatably connected to the connecting rod 4. Both ends of the connecting rod 4 are provided with first placement holes 42; the airbag module includes a plurality of diaphragm airbags 6, each of the diaphragm airbags 6 is provided with a lead-out pin 61 with two round balls 62, the lead-out pin 61 passes through the first placement hole 42, and is tightly and fixedly connected to the connecting rod 4 through the round ball 62, and the driving assembly 1 rotates to realize the up and down pushing of the diaphragm airbag 6;

[0033] The valve assembly includes an upper shell 8, a valve bracket 7 and a diaphragm airbag bracket 5, and the upper shell 8 and the diaphragm airbag bracket 5 are fixedly connected to the valve bracket 7 respectively; the upper shell 8 and the valve bracket 7 are fixedly connected to form a valve bracket 7 cavity, the upper shell 8 is provided with an air inlet 81 and an air outlet 82, the valve bracket 7 and the diaphragm airbag bracket 5 are provided with a first vent 9 communicating with the air inlet 81 and the cavity of the base 2, the valve bracket 7 and the diaphragm airbag bracket 5 are also provided with a second vent 10 and a third vent 11 communicating with the cavity of the valve bracket 7 and the cavity of the base 2, the valve bracket 7 is also provided with a plurality of small umbrella valves 71 and a large umbrella valve 72, after the gas enters from the air inlet 81, it passes through the first vent, the cavity of the base 2, the second vent 10 or the third vent 11 and the small umbrella valve 71 in sequence, and then enters the diaphragm airbag 6 to realize suction, and the gas is discharged from the air outlet 82 through the large umbrella valve 72 to realize exhaust.

[0034] The inclined hole 31 of the crank 3 proposed in the present invention is tightly fitted with the transmission shaft 32 by interference fit, which reduces the friction between the transmission shaft 32 and the crank 3, and is beneficial to improving the service life of the air pump; one end of the first air vent proposed in the present invention is connected to the air inlet 81, and the other end is connected to the cavity of the base 2. After the gas enters from the air inlet 81, it can only enter the cavity of the base 2 through the first air vent, so that the pressure of the cavity of the base 2 is equal to that of the outside during the inhalation process, avoiding damage to the compression component by the vacuum and improving the service life; the air outlet 82 of the upper shell 8 proposed in the present invention is designed to have a large gas flow channel and a small air outlet 82, which is beneficial to reducing the working noise of the air pump.

[0035] In this embodiment, a micro air pump for a cold compress device includes a valve assembly, a drive assembly 1, and a compression assembly. The valve assembly and the drive assembly 1 are fixedly connected to the compression assembly respectively; the compression assembly includes a base 2, a drive connecting rod module and an airbag module. The base 2 is provided with a base 2 cavity for placing the drive connecting rod module and the airbag module. The drive connecting rod module includes a crank 3, a transmission shaft 32, and a connecting rod 4. One end of the transmission shaft 32 is fixedly connected to the crank 3, and the other end is rotatably connected to the connecting rod 4. The connecting rod 4 has first placement holes 42 at both ends; the airbag module includes a plurality of diaphragm airbags 6, and the diaphragm airbags 6 are provided with a lead pin 61 with two balls 62, the lead pin 61 passes through the first placement hole 42, and is tightly and fixedly connected with the linkage rod 4 through the ball 62; the base 2 is fixedly connected with the driving assembly 1, and the base 2 is provided with a second placement hole 23, the driving assembly 1 is provided with an output shaft 21, the output shaft 21 passes through the second placement hole 23 and is tightly and fixedly connected with the crank 3, the rotation of the driving assembly 1 will drive the crank 3 to rotate, the rotation of the crank 3 drives the transmission shaft 32 to rotate, the rotation of the transmission shaft 32 drives the linkage rod 4 to push up and down, and the linkage rod 4 pushes up and down to realize the downward suction and upward exhaust movement of the diaphragm airbag 6;

[0036] The valve assembly includes an upper shell 8, a valve bracket 7 and a diaphragm airbag bracket 5, and the upper shell 8 and the diaphragm airbag bracket 5 are fixedly connected to the valve bracket 7 respectively; the upper shell 8 and the valve bracket 7 are fixedly connected to form a valve bracket 7 cavity, the upper shell 8 is provided with an air inlet 81 and an air outlet 82, the valve bracket 7 and the diaphragm airbag bracket 5 are provided with a first vent 9 communicating with the air inlet 81 and the base 2 cavity, the valve bracket 7 and the diaphragm airbag bracket 5 are also provided with a second vent 10 and a third vent 11 communicating with the valve bracket 7 cavity and the base 2 cavity, and the valve bracket 7 is also provided with a plurality of small umbrella valves 71 and a large umbrella valve 72;

[0037] When the linkage rod 4 is in tension, the diaphragm airbag 6 moves downward, and the air pressure of the diaphragm airbag 6 will be lower than the natural atmospheric pressure. At this time, the natural atmospheric pressure will enter from the air inlet 81 of the upper shell 8, flow through the first vent hole 9, the base 2 cavity and the second vent hole 10 or the third vent hole 11 into the valve bracket 7 cavity, and the airflow will then push open the small umbrella-shaped valve 71 with a one-way ventilation function and enter the diaphragm airbag 6. At this time, the diaphragm airbag 6 will be filled with gas to achieve the suction function;

[0038] When the linkage rod 4 is converted to have thrust, the diaphragm airbag 6 moves upward, and the gas in the diaphragm airbag 6 will be compressed due to the thrust, and the pressure of the diaphragm airbag 6 will be greater than the external atmospheric pressure, so the large umbrella valve 72 will be pushed open. Because the large umbrella valve 72 also has a one-way ventilation property, the airflow will not flow back and will only be discharged from the air outlet 82 of the upper shell 8 to achieve the exhaust function; the driving component 1 continues to rotate to achieve the pumping function of the air pump;

[0039] The inclined hole 31 of the crank 3 proposed in the present invention is tightly fitted with the transmission shaft 32 by interference fit, which reduces the friction between the transmission shaft 32 and the crank 3, and is beneficial to improving the service life of the air pump; one end of the first air vent proposed in the present invention is connected to the air inlet 81, and the other end is connected to the cavity of the base 2. After the gas enters from the air inlet 81, it can only enter the cavity of the base 2 through the first air vent, so that the pressure of the cavity of the base 2 is equal to that of the outside during the inhalation process, avoiding damage to the compression component by the vacuum and improving the service life; the air outlet 82 of the upper shell 8 proposed in the present invention is designed to have a large gas flow channel and a small air outlet 82, which is beneficial to reducing the working noise of the air pump.

[0040] Please refer to Figure 2 and Figure 5 The base 2 is fixedly connected to the driving assembly 1, and a second placement hole 23 is provided at the center of the base 2. The driving assembly 1 is provided with an output shaft 21, which passes through the second placement hole 23 and is tightly connected to the crank 3. The rotation of the driving assembly 1 will drive the crank 3 to rotate.

[0041] During specific implementation: the base 2 is fixedly connected to the driving component 1. In a specific embodiment, the base 2 is provided with a third placement hole 24, and a plurality of short screws 22 are used to fix the base 2 and the driving component 1 through the third placement hole 24; a second placement hole 23 is also provided at the center of the base 2, and the driving component 1 is provided with an output shaft 21, and the output shaft 21 passes through the second placement hole 23 and is fixedly connected to the crank 3. In a specific embodiment, an interference fit is used for fixed connection, which has low friction and good stability, and the rotation of the driving component 1 will drive the crank 3 to rotate.

[0042] Please refer to Figure 2-Figure 4The crank 3 is provided with an inclined hole 31, and the center of the connecting rod 4 is provided with an inner hole 41. One end of the transmission shaft 32 is embedded in the inclined hole 31 and fixedly connected with the crank 3, and the other end supports the steel ball 33 and is rotatably connected with the connecting rod 4 with clearance fit. The rotation of the crank 3 drives the transmission shaft 32 to rotate, and the rotation of the transmission shaft 32 drives the connecting rod 4 to push up and down.

[0043] In specific implementation: the crank 3 is provided with an inclined hole 31, and the center of the connecting rod 4 is provided with an inner hole 41. One end of the transmission shaft 32 is embedded in the inclined hole 31 and fixedly connected with the crank 3. In a specific embodiment, an interference fit is adopted for fixed connection, with low friction and good stability. The other end supports the steel ball 33 and is rotationally connected with the connecting rod 4 with clearance fit. The rotation of the crank 3 drives the transmission shaft 32 to rotate, and the rotation of the transmission shaft 32 drives the connecting rod 4 to push up and down.

[0044] Please refer to Figure 1-Figure 6 The diaphragm airbag 6 is provided with a lead-out pin 61 with two balls 62. The lead-out pin 61 passes through the first placement holes 42 at both ends of the connecting rod 4 and is tightly and fixedly connected to the connecting rod 4 through the balls 62. The connecting rod 4 pushes up and down to realize the suction and exhaust of the diaphragm airbag 6.

[0045] In specific implementation: the diaphragm airbag 6 is provided with a lead-out pin 61 with two round balls 62, the lead-out pin 61 passes through the first placement holes 42 at both ends of the connecting rod 4, and is tightly and fixedly connected to the connecting rod 4 through the round balls 62; in a specific embodiment, the diaphragm airbag 6 is made of a soft rubber material, and the round ball 62 at the lower end of the lead-out pin 61 of the diaphragm airbag 6 can be forcibly passed through the first placement hole 42 of the connecting rod 4, and because the round ball 62 of the lead-out pin 61 is larger in diameter than the first placement hole 42 of the connecting rod 4, the diaphragm airbag 6 and the connecting rod 4 are tightly and fixedly connected and not easy to loosen, and the connecting rod 4 is pushed up and down to realize the suction and exhaust of the diaphragm airbag 6; in a specific embodiment, the lead-out pin 61 provided on the diaphragm airbag 6 can be trimmed to avoid friction and collision between the lead-out pin 61 and other components.

[0046] Please refer to Figure 1-Figure 7 The air inlet 81 is fixedly connected to the upper shell 8, and the air inlet 81 is provided with an annular protrusion at the lower end of the upper shell 8, and the first air vent 9 is provided with an annular groove, and the annular protrusion is embedded in the annular groove to realize the sealed connection between the air inlet 81 and the first air vent. One end of the first air vent is connected to the air inlet 81, and the other end is connected to the cavity of the base 2. After entering from the air inlet 81, the gas can only enter the cavity of the base 2 through the first air vent, so that the air pressure of the cavity of the base 2 is equal to that of the outside.

[0047] In specific implementation: the air inlet 81 is fixedly connected to the upper shell 8, and the air inlet 81 is provided with an annular convex block at the lower end of the upper shell 8, and the first air vent 9 is provided with an annular groove, and the annular convex block is embedded in the annular groove to achieve a sealed connection between the air inlet 81 and the first air vent. One end of the first air vent is connected to the air inlet 81, and the other end is connected to the cavity of the base 2. After the gas enters from the air inlet 81, it can only enter the cavity of the base 2 through the first air vent, so that the cavity of the base 2 is equal to the external air pressure, which is conducive to promoting smooth air intake and exhaust, and avoiding vacuum damage to the compression component, thereby improving the service life;

[0048] Please refer to Figure 1-Figure 8 A plurality of small umbrella-shaped valves 71 are fixedly connected to the valve bracket 7 , and the small umbrella-shaped valves 71 are one-way valves, so that the gas can only enter the diaphragm airbag 6 from the cavity of the valve bracket 7 .

[0049] In specific implementation: the valve bracket 7 is provided with a small umbrella valve placement hole 711, and the small umbrella valve 71 is fixedly connected to the valve bracket 7 through the small umbrella valve placement hole 711. After the gas reaches the base 2 cavity, it reaches the valve bracket 7 cavity through the second vent hole 10 and the third vent hole 11. The airflow pushes the small umbrella valve 71 installed on the valve bracket 7 through the air inlet flow hole 712. Because the small umbrella valve 71 has a one-way ventilation function, the airflow will not flow back, and the gas will only enter the diaphragm airbag 6. At this time, the diaphragm airbag 6 will be filled with gas. In a specific embodiment, the small umbrella valve 71 is made of rubber material, which has better plasticity and sealing performance.

[0050] Please refer to Figure 1-Figure 8 The air outlet 82 is fixedly connected to the upper shell 8, and the air outlet 82 is provided with an annular convex block at the lower end of the upper shell 8, and the large umbrella valve 72 is provided with an annular groove, and the annular convex block is embedded in the annular groove to achieve a sealed connection between the air outlet 82 and the large umbrella valve 72. Several large umbrella valves 72 are fixedly connected to the valve bracket 7, and the large umbrella valves 72 are one-way valves, and the gas can only be discharged from the diaphragm airbag 6 through the large umbrella valves 72 from the air outlet 82.

[0051] In the specific implementation: the valve bracket 7 is provided with a large umbrella-shaped valve placement hole 721, and the large umbrella-shaped valve 72 is fixedly connected to the valve bracket 7 through the large umbrella-shaped valve placement hole 721. When the driving component 1 continues to rotate, driving the crank 3 to rotate together, the transmission shaft 32 will drive the connecting rod 4 to move up and down. When the connecting rod 4 is converted to have thrust, that is, when the diaphragm airbag 6 moves upward, the gas in the diaphragm airbag 6 will be compressed due to the thrust, and the pressure of the diaphragm airbag 6 will be greater than the external atmospheric pressure. Therefore, the large umbrella-shaped valve 72 assembled in the middle of the valve bracket 7 is pushed open through the air outlet flow hole 722 on the valve bracket 7. Because the large umbrella-shaped valve 72 also has the function of one-way ventilation, the airflow will not flow back, and will only be discharged from the air outlet 82 of the upper shell 8. In a specific embodiment, the large umbrella-shaped valve 72 is made of rubber material, which has better plasticity and sealing properties.

[0052] Please refer to Figure 1-Figure 8 The upper shell 8 and the diaphragm airbag bracket 5 are fixedly connected to the valve bracket 7, and the valve bracket 7 and the base 2 are fixedly connected to the diaphragm airbag bracket 5.

[0053] During specific implementation: the upper shell 8, the valve bracket 7, the diaphragm airbag bracket 5 and the base 2 are fixedly connected. In a specific embodiment, four long screws 84 are used to fix the connection at the connector 83, which effectively improves production efficiency, effectively realizes fully automated assembly, and effectively reduces production costs.

[0054] Of course, the present utility model may have many other implementations. Based on the present implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present utility model.

Claims

1. A micro air pump for a cold compress device, characterized in that , including a valve assembly, a drive assembly, and a compression assembly, wherein the valve assembly and the drive assembly are respectively fixedly connected to the compression assembly; The compression assembly includes a base, a driving connecting rod module and an airbag module, wherein the base is provided with a base cavity for placing the driving connecting rod module and the airbag module, the driving connecting rod module includes a crank, a transmission shaft and a connecting rod, one end of the transmission shaft is fixedly connected to the crank, and the other end is rotatably connected to the connecting rod, and first placement holes are provided at both ends of the connecting rod; the airbag module includes a plurality of diaphragm airbags, and the diaphragm airbags are fixedly connected to the connecting rod; The valve assembly includes an upper shell, a valve bracket and a diaphragm airbag bracket, the upper shell and the diaphragm airbag bracket are fixedly connected to the valve bracket respectively; the upper shell and the valve bracket are fixedly connected to form a valve bracket cavity, the upper shell is provided with an air inlet and an air outlet, the valve bracket and the diaphragm airbag bracket are provided with a first air vent connected to the air inlet and the base cavity, the valve bracket and the diaphragm airbag bracket are also provided with a second air vent and a third air vent connected to the valve bracket cavity and the base cavity, the valve bracket is also provided with a plurality of small umbrella valves and a large umbrella valve, after the gas enters from the air inlet, it passes through the first air vent, the base cavity, the second air vent or the third air vent and the small umbrella valve in sequence, and then enters the diaphragm airbag to realize suction, and the gas is discharged from the air outlet through the large umbrella valve to realize exhaust.

2. A micro air pump for a cold compress according to claim 1, characterized in that: The driving assembly is provided with an output shaft, and a second placement hole is provided at the center of the base, and the output shaft is fixedly connected to the crank through the second placement hole.

3. A micro air pump for a cold compress device according to claim 2, characterized in that: A third placement hole is provided at the center of the base, and the base is fixedly connected to the driving assembly through the third placement hole.

4. A micro air pump for a cold compress device according to claim 1, characterized in that: The crank is provided with an oblique hole, the center position of the connecting rod is provided with an inner hole, one end of the transmission shaft is embedded in the oblique hole and fixedly connected to the crank, and the other end supports the steel ball and is rotatably connected to the connecting rod.

5. The micro air pump for cold compress according to claim 1, characterized in that: The diaphragm airbag is provided with a lead-out pin with two round balls, the lead-out pin passes through the first placement hole, and is fixedly connected to the linkage rod through the round balls.

6. A micro air pump for a cold compress device according to claim 1, characterized in that: The air inlet is fixedly connected to the upper shell, and the air inlet is provided with an annular protrusion at the lower end of the upper shell, and the first air vent is provided with an annular groove, and the annular protrusion is embedded in the annular groove.

7. A micro air pump for a cold compress device according to claim 6, characterized in that: One end of the first vent hole is communicated with the air inlet, and the other end is communicated with the base cavity.

8. The micro air pump for cold compress according to claim 1, characterized in that: The small umbrella-shaped valve is fixedly connected to the valve bracket.

9. The micro air pump for cold compress according to claim 1, characterized in that: The air outlet is fixedly connected to the upper shell, and the air outlet is provided with an annular convex block at the lower end of the upper shell, and the large umbrella-shaped valve is provided with an annular groove, and the annular convex block is embedded in the annular groove.

10. A micro air pump for a cold compress device according to claim 9, characterized in that: The large umbrella-shaped valve is fixedly connected to the valve bracket.

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