Miniature vacuum air pump and air collecting and exhausting assembly thereof

Abstract

The embodiment of the utility model provides a miniature vacuum air pump and an air collecting and exhausting assembly thereof, the air collecting and exhausting assembly comprises a cylinder body which comprises a cylinder barrel and an elastic air bag, the side face of the cylinder barrel is further provided with an inserting hole, and the elastic air bag is correspondingly arranged in the cylinder barrel and provided with a bag opening on one side directly facing the inserting hole. The lateral bag wall and the periphery of a bag opening of the elastic air bag are both connected with the cylinder wall of the cylinder barrel in a sealed mode. The end bag walls, facing the openings in the two ends of the cylinder barrel, of the elastic air bag are each provided with an inner exhaust hole and a valve block extending into the inner exhaust hole. The swing frame comprises a swing shaft used for being in butt joint with an output shaft of a driving piece of the miniature vacuum air pump and a swing arm used for alternately pushing the two ends of the elastic air bag to move towards the opening direction of the bag wall towards the corresponding end of the cylinder barrel under driving of the swing shaft, and an airflow channel is formed in the swing arm. The end, located outside the cylinder barrel, of the airflow channel is provided with an air inlet, and the end, located in the cylinder barrel, of the airflow channel is provided with air outlets in one-to-one correspondence with the two valve blocks on the elastic air bag. The volume of the miniature vacuum air pump can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of micro air pump technology, and in particular to a micro vacuum pump and its exhaust assembly. Background Technology

[0002] Existing small household appliances such as mini vacuum packaging machines and electric breast pumps all require vacuum pumps for vacuuming operations. Due to different requirements for performance indicators such as power, vacuum level, service life, noise, size, and safety, large vacuum pumps that are widely used in industry or commerce are not suitable, and miniature vacuum pumps are required.

[0003] An existing miniature vacuum pump includes a housing, a first compression assembly, a second compression assembly, and a power assembly. The first compression assembly includes a first air vent plate, a first diaphragm, and a first cover plate. One end of the first air vent plate is connected to the housing, and the other end is connected to the first cover plate. The first cover plate has a first inlet and a first outlet, which are respectively connected to the first air vent plate. The second compression assembly includes a second air vent plate, a second diaphragm, and a second cover plate. One end of the second air vent plate is connected to the housing, and the other end is connected to the second cover plate. The second cover plate has a second inlet and a second outlet, with one end of the second inlet connected to... The first input port is connected to the second air passage plate at one end, and the second output port is connected to the first output port at one end and the second air passage plate at the other end. The power component is used to drive the first diaphragm and the second diaphragm to move synchronously and alternately in both directions. The power component includes a rotating shaft, an eccentric wheel, a flywheel, and a power element. The rotating shaft passes through the eccentric wheel. The first piston and the second piston are sleeved on the eccentric wheel. The eccentric wheel is used to drive the first piston and the second piston to move synchronously and alternately in both directions. The flywheel is connected to one side of the eccentric wheel. The power element is installed in the housing and is used to drive the rotating shaft to rotate.

[0004] However, the inventors discovered in specific embodiments that, in order to improve the intake efficiency, the above-mentioned miniature vacuum pump requires a diaphragm to be set on each side of the power component, and the power component drives the two diaphragms to alternately intake and exhaust air; in addition, the power component also needs to be equipped with two sets of eccentric wheels and flywheels to drive one diaphragm to work, resulting in a very large overall size of the miniature vacuum pump and a high manufacturing cost, which is not conducive to the miniaturization design of the air pump. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is to provide a collection and exhaust assembly for a miniature vacuum pump, which can effectively reduce the pump body volume.

[0006] The further technical problem to be solved by this utility model embodiment is to provide a miniature vacuum pump that can effectively reduce the pump body volume.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a collection and exhaust assembly for a miniature vacuum pump, comprising:

[0008] A cylinder body includes a cylinder barrel with openings at both ends and insertion holes on its sides, and an elastic airbag disposed within the cylinder barrel with an opening on the side facing the insertion holes. The lateral walls of the elastic airbag and the periphery of the opening are sealed to the cylinder barrel wall. Each elastic airbag has an internal exhaust port on its lateral wall facing the openings at both ends of the cylinder barrel, and a valve plate extending from one side wall of the internal exhaust port into the internal exhaust port.

[0009] The swing arm includes a swing shaft for docking with the output shaft of the drive unit of the miniature vacuum pump and a swing arm that extends laterally from the end of the swing shaft and whose free end is inserted into the elastic air bladder through the insertion hole and the bladder opening. Driven by the swing shaft, the swing arm alternately pushes the two ends of the elastic air bladder toward the opening of the corresponding end of the cylinder. The swing arm has an airflow channel formed inside, extending along the length of the swing arm. The airflow channel has an air inlet at one end outside the cylinder and an air outlet at the other end inside the cylinder, which corresponds to the two valve plates on the elastic air bladder.

[0010] Furthermore, the cylinder and the elastic airbag are integrally molded from elastic rubber or silicone.

[0011] Furthermore, the swing arm and the elastic airbag are positioned by corresponding positioning structures provided between the inner walls of the swing arm and the elastic airbag.

[0012] Furthermore, the exhaust assembly also includes two valve plate modules respectively disposed on the outer sides of opposite ends of the cylinder block, each valve plate module comprising:

[0013] The main valve plate has a fixing structure for fixing the cylinder and a recess for accommodating the elastic airbag on its side facing the cylinder body. The bottom wall of the recess has an external exhaust hole. The outer peripheries of the main valve plates of the two valve plate modules are abutted against each other and cooperate with the cylinder body to form a buffer cavity. The swing arm is assembled in the buffer cavity. One of the main valve plates of the valve plate module also has a through hole communicating with the buffer cavity, allowing the swing shaft to pass through and airflow to enter the buffer cavity.

[0014] A first one-way airflow valve, assembled on the side of the main valve plate opposite to the cylinder body, is used to control the unidirectional flow of the external exhaust port from one end connected to the recess to the opposite end.

[0015] Furthermore, multiple swing arms extend symmetrically from the end of the swing shaft in the circumferential direction, and a cylinder is provided for each swing arm.

[0016] Furthermore, the bottom wall of the recess is designed to avoid the inclined surface of the end wall of the elastic airbag when it moves to the maximum stroke position in the direction of the corresponding end opening of the cylinder under the action of the swing arm.

[0017] Furthermore, the exhaust assembly also includes a first cover and a second cover respectively disposed on the outer sides of the two valve plate modules. A first noise reduction chamber is formed between the first cover and the adjacent valve plate module and is connected to the first one-way airflow valve of the adjacent valve plate module. A second noise reduction chamber is formed between the second cover and the adjacent valve plate module and is connected to the first one-way airflow valve of the adjacent valve plate module. The first noise reduction chamber and the second noise reduction chamber are also connected through a first exhaust channel that passes through the two valve plate modules.

[0018] Furthermore, the second cover is located outside the valve plate module with the through hole, and a third cover is also provided outside the second cover. An air inlet is formed on the third cover, and the air inlet is connected to the through hole through an air intake channel formed by airflow holes or airflow grooves formed on the third cover and the second cover respectively.

[0019] Furthermore, the third cover has an external exhaust port on its side, and the second cover and the adjacent valve plate module form a third noise reduction chamber. The third cover also has a final noise reduction chamber that is connected to the external exhaust port and the third noise reduction chamber respectively. The first noise reduction chamber and the third noise reduction chamber are connected by a second exhaust channel that passes through the two valve plate modules in sequence. The connection between the third noise reduction chamber and the final noise reduction chamber is also provided with a second one-way airflow valve for controlling the airflow to flow unidirectionally from the third noise reduction chamber to the final noise reduction chamber.

[0020] Furthermore, the final noise reduction chamber forms an opening on the side of the third cover opposite to the second cover, and the opening is correspondingly sealed and covered by a cover plate. The cover plate, the third cover and the second cover are all formed with shaft holes facing each other so that the output shaft of the drive unit can pass through in sequence. The shaft holes on the third cover and the second cover also constitute part of the air intake channel. The shaft hole of the cover plate is also filled with a sealing ring to seal the gap between the shaft seat of the output shaft and the wall of the shaft hole.

[0021] On the other hand, in order to solve the above-mentioned further technical problems, the present invention also provides the following technical solution: a miniature vacuum pump, including an exhaust assembly and a drive for driving the exhaust assembly, wherein the exhaust assembly is an exhaust assembly as described in any of the above claims.

[0022] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: The exhaust assembly of the present utility model embodiment includes a cylinder and a swing arm. By inserting the swing arm of the swing arm into the elastic air bladder from the opening of the elastic air bladder in the cylinder, when the driving component drives the swing arm of the swing arm to alternately push the two end walls of the elastic air bladder toward the opening direction of the corresponding end of the cylinder, during the reciprocating motion of the elastic air bladder, the airflow will enter the airflow channel from the air inlet of the swing arm, and then alternately push open the valve plate of the elastic air bladder from the air outlet on the corresponding side and exhaust to the outside through the corresponding internal exhaust hole. Thus, when the swing arm drives the end walls of the elastic air bladder at both ends to reciprocate in the cylinder, exhaust can be achieved when the end wall of either end expands outward, effectively improving the exhaust efficiency; moreover, the structure is simpler, which can effectively reduce the volume of the micro vacuum pump, facilitate manufacturing and assembly, and reduce manufacturing costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the disassembled structure of the cylinder and the swing frame in an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model.

[0024] Figure 2 This is a schematic cross-sectional view of the cylinder and swing frame of an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model.

[0025] Figure 3 This is a schematic diagram showing the split structure of an optional embodiment of the miniature vacuum pump of this utility model.

[0026] Figure 4 This is a schematic diagram of the disassembled structure outside the drive component at the inverted rear of an optional embodiment of the miniature vacuum pump of this utility model.

[0027] Figure 5 This is a schematic diagram of the assembly structure of an optional embodiment of the miniature vacuum pump of this utility model.

[0028] Figure 6 This is a schematic diagram of the main valve plate of an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model.

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the air passage from the air inlet to the first noise reduction chamber and the second noise reduction chamber, which is an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model.

[0030] Figure 8 This is a schematic diagram of the airflow cross-section structure from the second noise reduction chamber to the first noise reduction chamber in an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model.

[0031] Figure 9 This is a schematic diagram of the airflow cross-section structure from the first noise reduction chamber to the third noise reduction chamber in an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model.

[0032] Figure 10 This is a schematic diagram of the air path structure from the noise reduction chamber to the external exhaust port in an optional embodiment of the exhaust assembly of the miniature vacuum pump of this utility model. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0034] like Figures 1-2 As shown, an optional embodiment of this utility model provides a micro vacuum pump exhaust assembly 1, comprising:

[0035] The cylinder body 10 includes a cylinder barrel 101 with openings at both ends and insertion holes on its sides, and an elastic airbag 103 disposed within the cylinder barrel 101 with an opening 1030 on the side facing the insertion holes 1010. The lateral walls of the elastic airbag 103 and the periphery of the opening 1030 are sealed to the cylinder wall 101. The elastic airbag 103 has internal exhaust holes 1032 on its lateral walls facing the openings at both ends of the cylinder barrel 101, and valve plates 1034 extending from one side wall of the internal exhaust hole 1032 into its interior.

[0036] The swing arm 12 includes a swing shaft 121 for docking with the output shaft 30 of the drive unit 3 of the micro vacuum pump, and a swing arm 123 that extends laterally from the end of the swing shaft 121 and is inserted into the elastic airbag 103 via the insertion hole 1010 and the bladder opening 1030. Under the drive of the swing shaft 121, the swing arm 123 alternately pushes the two ends of the elastic airbag 103 toward the opening of the corresponding end of the cylinder 101. The swing arm 123 has an airflow channel 1230 formed inside, extending along the length of the swing arm 123. The airflow channel 1230 has an air inlet 1232 at one end outside the cylinder 101 and an air outlet 1234 at the other end inside the cylinder 101, which corresponds to the two valve plates 1034 on the elastic airbag 103.

[0037] This utility model embodiment of the exhaust assembly 1 includes a cylinder body 10 and a swing arm 12. By inserting the swing arm 123 of the swing arm 12 into the elastic air bladder 103 through the opening 1030 of the elastic air bladder 103 in the cylinder body 10, when the driving member 3 drives the swing arm 123 of the swing arm 12 to alternately push the two ends of the elastic air bladder 103 toward the opening of the corresponding end of the cylinder 101, during the reciprocating motion of the elastic air bladder 103, the airflow will enter the airflow channel from the air inlet 1232 of the swing arm 123. 1230, and then alternately push open the valve plate 1034 of the elastic airbag 103 from the corresponding side air outlet 1234 to exhaust to the outside through the corresponding internal exhaust hole 1032, so that when the swing frame 12 drives the end walls of the elastic airbag 103 at both ends to reciprocate in the cylinder 101, exhaust can be achieved when the end wall of either end expands outward, effectively improving the exhaust efficiency; moreover, the structure is simpler, which can effectively reduce the size of the micro vacuum pump, facilitate manufacturing and assembly, and reduce manufacturing costs.

[0038] In a specific implementation, after the swing arm 123 is inserted into the elastic airbag 103, it can be directly elastically wrapped by the elastic airbag 103 to achieve relative positioning.

[0039] In one optional embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the cylinder 101 and the elastic airbag 103 are integrally molded from elastic rubber or silicone. In this embodiment, the cylinder 101 and the elastic airbag 103 are integrally molded from elastic rubber or silicone, which provides better airtightness and facilitates manufacturing and assembly.

[0040] In an optional embodiment of this utility model, the swing arm 123 and the elastic airbag 103 are positioned by corresponding positioning structures provided between the inner walls of the swing arm 123 and the elastic airbag 103. In this embodiment, there are many implementations of the positioning structure, for example: Figure 1 and Figure 2As shown, positioning grooves 1036 are formed on the inner walls of opposite sides of the elastic airbag 103, and positioning protrusions 123a are formed on the outer walls of opposite sides of the swing arm 123. When the swing arm 123 is inserted into the elastic airbag 103, it is positioned by the positioning protrusions 123a correspondingly inserted into the positioning grooves 1036. The positioning grooves 1036 and the positioning protrusions 123a serve as positioning structures to position the swing arm 123 and the elastic airbag 103. Of course, it can be understood that the positions of the positioning grooves 1036 and the positioning protrusions 123a can be interchanged; in addition, to achieve positioning in different directions... To prevent the swing arm 123 from becoming detached during the movement of the elastic airbag 103, positioning protrusions 123b are respectively provided on the upper and lower sides of the positioning protrusions 123a on both sides of the swing arm 123. The airflow channel 1230 also extends to the end face of the swing arm 123 to form an end-oriented positioning port 123c. The airbag wall of the elastic airbag 103 is provided with a positioning hole 1038 corresponding to the positioning protrusion 123b, and an end-oriented positioning protrusion 1039 corresponding to the positioning port 123c. The positioning protrusion 123b is inserted into the positioning hole 1038, and the end-oriented positioning protrusion 1039 is inserted into the end-oriented positioning port 123c.

[0041] In one optional embodiment of this utility model, such as Figures 3-10 As shown, the exhaust assembly 1 further includes two valve plate modules 14 respectively disposed on the outer sides of opposite ends of the cylinder block 10, each valve plate module 14 including:

[0042] The main valve plate 141 has a fixing structure 1410 for fixing the cylinder 101 and a recess 1412 for accommodating the elastic airbag 103 on its side facing the cylinder body 10. The bottom wall of the recess 1412 has an external exhaust hole 1414. The outer peripheries of the main valve plates 141 of the two valve plate modules 14 are abutted against each other and cooperate with the cylinder body 10 to form a buffer cavity 142. The swing arm 12 is assembled in the buffer cavity 142. One of the main valve plates 141 of the valve plate module 14 also has a through hole 1416 that communicates with the buffer cavity 142, allowing the swing shaft 121 to pass through and airflow to enter the buffer cavity 142.

[0043] A first one-way airflow valve 143, assembled on the side of the main valve plate 141 opposite to the cylinder body 10, is used to control the unidirectional flow of the external exhaust port 1414 from one end connected to the recess 1412 to the opposite end.

[0044] In this embodiment, valve plate modules 14 are also provided on the outer sides of the opposite ends of the cylinder body 10. The main valve plates 141 of the two valve plate modules 14 can be effectively clamped and fixed to the cylinder barrel 101 by the fixing structure 1410. The unidirectional airflow through the first one-way airflow valve 143 on the two main valve plates 141 can effectively collect and exhaust the air from the exhaust assembly 1. By setting the buffer chamber 142, more air flowing in through the through hole 1416 can be temporarily stored to ensure the continuity of exhaust through the air outlet 1232 on the elastic airbag 103.

[0045] In a specific implementation, the fixing structure 1410 can be a slot surrounding the opening of the recess 1412, and the two opposite ends of the cylinder 101 are respectively locked in the slots of the two main valve plates 141.

[0046] In specific implementation, the first one-way airflow valve 143 can be a flexible valve or an umbrella-shaped valve that can be movable to cover the opening of the external exhaust port 1414. Figures 3-10 In this embodiment, the first conduction control element 143 is an elastic air valve. Since multiple external exhaust holes 1414 are symmetrically arranged on the main valve plate 141, for ease of assembly, the elastic air valves covering the external exhaust holes 1414 on one main valve plate 141 are collectively mounted on a carrier plate 1430; of course, it is understood that the individual elastic air valves can also be arranged separately. Furthermore, to prevent the carrier plate 1430 from covering the first exhaust channel 145, the second exhaust channel 147, and the through hole 1416 on the main valve plate 141, the first exhaust channel 145, the second exhaust channel 147, and / or the through hole 1416 can also be provided on the carrier plate 1430, such as... Figures 3-4 In one embodiment, one of the carrier plates 1430 is provided with the first exhaust channel 145, and the other carrier plate 1430 is provided with the first exhaust channel 145 and a through hole 1416.

[0047] In one optional embodiment of this utility model, such as Figures 1-4 As shown, multiple swing arms 123 extend symmetrically from the end of the swing shaft 121 in the circumferential direction, and a cylinder 10 is provided for each swing arm 123. In this embodiment, multiple swing arms 123 are provided at the end of the swing shaft 121, and a cylinder 10 is provided for each swing arm 123. The swing arms 123 can cooperate with the elastic air bladder 103 in a cylinder 10, thereby improving the exhaust efficiency of the micro vacuum pump.

[0048] In one optional embodiment of this utility model, such as Figures 3-4 and Figure 6As shown, the bottom wall of the recess 1412 is designed to avoid the inclined surface 1412a of the end-to-end wall of the elastic airbag 103 when it moves to the maximum stroke position in the direction of the corresponding open end of the cylinder 101 under the action of the rocker arm 123. In this embodiment, by designing the bottom wall of the recess 1412 as an inclined surface, the collision between the rocker arm 123 and the bottom wall of the recess 1412 is avoided when the elastic airbag 103 moves. This helps to maximize the stroke of the elastic airbag 103 and improve the intake and exhaust efficiency of the elastic airbag 103.

[0049] In one optional embodiment of this utility model, such as Figures 3-4 and Figures 7-10 As shown, the exhaust assembly 1 also includes a first cover 16 and a second cover 17 respectively disposed on the outer sides of the two valve plate modules 14. The first cover 16 and the adjacent valve plate module 14 form a first noise reduction chamber 161 that communicates with the first one-way airflow valve 143 of the adjacent valve plate module 14. The second cover 17 and the adjacent valve plate module 14 form a second noise reduction chamber 171 that communicates with the first one-way airflow valve 143 of the adjacent valve plate module 14. The first noise reduction chamber 161 and the second noise reduction chamber 171 are also connected through a first exhaust channel 145 that passes through the two valve plate modules 14 respectively. In this embodiment, a first cover 16 and a second cover 17 are assembled on the outer side of each valve plate module 14, forming a first noise reduction chamber 161 and a second noise reduction chamber 171 respectively. The airflow can first enter the corresponding first noise reduction chamber 161 and second noise reduction chamber 171 to achieve noise reduction and reduce the noise of gas exhaust. Then, by setting a first exhaust channel 145, after preliminary noise reduction, the gas can be gathered in a noise reduction chamber through the first exhaust channel 145, extending the gas flow path and effectively reducing exhaust noise.

[0050] In one optional embodiment of this utility model, such as Figures 3-4 and Figures 7-10 As shown, the second cover 17 is located outside the valve plate module 14 with the through hole 1416. A third cover 18 is also provided outside the second cover 17. An air inlet 181 is formed on the third cover 18. The air inlet 181 is connected to the through hole 1416 via an air intake channel 183 formed by airflow holes or grooves sequentially connected to the third cover 18 and the second cover 17. In this embodiment, by providing the third cover 18, external air enters the third cover 18 from the air inlet 181, and then enters the buffer chamber 142 through the air intake channel 183 and the through hole 1416. The overall gas flow path is also relatively longer, reducing airflow noise.

[0051] In one optional embodiment of this utility model, such as Figures 3-4 and Figures 7-10 As shown, the third cover 18 has an external exhaust port 185 on its side. The second cover 17 and the adjacent valve plate module 14 form a third noise reduction chamber 173. The third cover 18 also has a final noise reduction chamber 187 that is connected to the external exhaust port 185 and the third noise reduction chamber 173 respectively. The first noise reduction chamber 161 and the third noise reduction chamber 173 are connected by a second exhaust channel 147 that passes through the two valve plate modules 14 in sequence. The connection between the third noise reduction chamber 173 and the final noise reduction chamber 187 is also provided with a second one-way airflow valve 188 for controlling the airflow to flow unidirectionally from the third noise reduction chamber 173 to the final noise reduction chamber 187. In this embodiment, the airflow from the first noise reduction chamber 161 and the second noise reduction chamber 171 is gathered into a noise reduction chamber through the first exhaust channel 145, then enters the third noise reduction chamber 173 through the second exhaust channel 147, and then enters the final noise reduction chamber 187 through the second one-way airflow valve 188, and finally is discharged from the external exhaust port 185, which further extends the gas flow path and reduces airflow noise.

[0052] In specific implementation, such as Figure 3 , Figure 4 , Figure 6 and Figure 9 As shown, both the first exhaust channel 145 and the second exhaust channel 147 are formed by airflow holes connected to the two main valve plates 141. To improve noise reduction, a relatively spacious cavity can be formed by appropriately expanding the predetermined section of the second exhaust channel 147 to achieve airflow noise reduction, for example... Figure 9 The noise reduction cavity 1470 is located on the two main valve plates 141, as shown; Figure 3 , Figure 4 and Figure 10 As shown, to achieve communication between the third noise reduction chamber 173 and the final noise reduction chamber 187, the second cover 17 is provided with a first air guide hole 175, and the third cover 18 is provided with a second air guide hole 189. The first air guide hole 175 and the second air guide hole 189 are sealed together to connect the third noise reduction chamber 173 and the final noise reduction chamber 187. Correspondingly, the second one-way airflow valve 188 can be a flexible valve or an umbrella-shaped valve that can be used to cover the opening of the second air guide hole 189. Figure 3 , Figure 4 and Figure 10 In the embodiment shown, an umbrella-shaped pin is used.

[0053] In one optional embodiment of this utility model, such as Figure 2 , Figure 3 and Figure 7As shown, the final noise reduction chamber 187 forms an opening 1870 on the side of the third cover 18 away from the second cover 17. The opening 1870 is correspondingly sealed and covered by a cover plate 19. The cover plate 19, the third cover 18, and the second cover 17 are all formed with shaft holes 31 facing each other so that the output shaft 30 of the drive unit 3 can pass through in sequence. The shaft holes 31 on the third cover 18 and the second cover 17 also constitute part of the air intake channel 183. The shaft hole 30 of the cover plate 19 is also filled with a sealing ring 34 to seal the gap between the shaft seat 32 of the output shaft 30 and the hole wall of the shaft hole 31. In this embodiment, the final noise reduction chamber 187 forms an opening 1870 on the side of the third cover 18 away from the second cover 17. The opening 1870 is correspondingly sealed and shielded by a cover plate 19, which facilitates the formation of the final noise reduction chamber 187 on the third cover 18. Furthermore, by providing shaft holes 30, the output shaft 30 of the drive member 3 can pass through the shaft holes 31 in sequence and extend into the third cover 18. Moreover, the setting of the sealing ring 34 can also ensure sealing. The shaft holes 30 located on the third cover 18 and the second cover 17 also constitute part of the air intake channel 183, thus realizing multiple functions with a simple structure.

[0054] In specific implementation, an adapter 36 is assembled at one end of the output shaft 30 that extends into the third cover 18, and the swing shaft 121 of the swing frame 12 is inclinedly inserted into the adapter 36 at a position offset from the output shaft 30; in addition, the external discharge port 185 is also separately provided on the third cover 18, or it can be separately provided on the cover plate 19; of course, if Figures 1-2 , Figure 6 , Figure 10 As shown, a portion of the notch can also be formed on the cover plate 19 and the third cover 18 respectively, and the two notches together form the outer outlet 185; the driving component 3 can be a common rotary driving component such as a drive motor.

[0055] On the other hand, such as Figures 3-10 As shown in the figure, this utility model embodiment also provides a miniature vacuum pump, including an exhaust and collection assembly 1 and a drive component 3 for driving the exhaust and collection assembly 1. The exhaust and collection assembly 1 is the exhaust and collection assembly as described in any of the above embodiments. In this embodiment, the miniature vacuum pump uses the aforementioned exhaust and collection assembly 1, which can effectively achieve bidirectional exhaust and collection, and has a simple structure, which can reduce the finished product volume and manufacturing cost.

[0056] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A collection and exhaust assembly for a miniature vacuum pump, characterized in that, The exhaust gas collection assembly includes: A cylinder body includes a cylinder barrel with openings at both ends and insertion holes on its sides, and an elastic airbag disposed within the cylinder barrel with an opening on the side facing the insertion holes. The lateral walls of the elastic airbag and the periphery of the opening are sealed to the cylinder barrel wall. Each elastic airbag has an internal exhaust port on its lateral wall facing the openings at both ends of the cylinder barrel, and a valve plate extending from one side wall of the internal exhaust port into the internal exhaust port. The swing arm includes a swing shaft for docking with the output shaft of the drive unit of the miniature vacuum pump and a swing arm that extends laterally from the end of the swing shaft and whose free end is inserted into the elastic air bladder through the insertion hole and the bladder opening. Driven by the swing shaft, the swing arm alternately pushes the two ends of the elastic air bladder toward the opening of the corresponding end of the cylinder. The swing arm has an airflow channel formed inside, extending along the length of the swing arm. The airflow channel has an air inlet at one end outside the cylinder and an air outlet at the other end inside the cylinder, which corresponds to the two valve plates on the elastic air bladder.

2. The exhaust and collection assembly of the miniature vacuum pump as described in claim 1, characterized in that, The cylinder and the elastic airbag are integrally molded from elastic rubber or silicone.

3. The exhaust and collection assembly of the miniature vacuum pump as described in claim 1, characterized in that, The swing arm and the elastic airbag are positioned by corresponding positioning structures provided between the inner walls of the swing arm and the elastic airbag.

4. The exhaust and collection assembly of the miniature vacuum pump as described in claim 1, 2, or 3, characterized in that, The exhaust assembly further includes two valve plate modules respectively disposed on the outer sides of opposite ends of the cylinder block, each valve plate module comprising: The main valve plate has a fixing structure for fixing the cylinder and a recess for accommodating the elastic airbag on its side facing the cylinder body. The bottom wall of the recess has an external exhaust hole. The outer peripheries of the main valve plates of the two valve plate modules are abutted against each other and cooperate with the cylinder body to form a buffer cavity. The swing arm is assembled in the buffer cavity. One of the main valve plates of the valve plate module also has a through hole communicating with the buffer cavity, allowing the swing shaft to pass through and airflow to enter the buffer cavity. A first one-way airflow valve, assembled on the side of the main valve plate opposite to the cylinder body, is used to control the unidirectional flow of the external exhaust port from one end connected to the recess to the opposite end.

5. The exhaust and collection assembly of the miniature vacuum pump as described in claim 4, characterized in that, Multiple swing arms extend symmetrically from the end of the swing shaft in the circumferential direction, and a cylinder is provided for each swing arm.

6. The exhaust and collection assembly of the miniature vacuum pump as described in claim 4, characterized in that, The bottom wall of the recess is designed to avoid the inclined surface of the end of the elastic airbag when it moves to the maximum stroke position in the direction of the corresponding end opening of the cylinder under the action of the swing arm.

7. The exhaust and collection assembly of the miniature vacuum pump as described in claim 4, characterized in that, The exhaust system further includes a first cover and a second cover respectively disposed on the outer sides of the two valve plate modules. A first noise reduction chamber is formed between the first cover and the adjacent valve plate module and is connected to the first one-way airflow valve of the adjacent valve plate module. A second noise reduction chamber is formed between the second cover and the adjacent valve plate module and is connected to the first one-way airflow valve of the adjacent valve plate module. The first noise reduction chamber and the second noise reduction chamber are also connected through a first exhaust channel that passes through the two valve plate modules.

8. The exhaust and collection assembly of the miniature vacuum pump as described in claim 7, characterized in that, The second cover is located outside the valve plate module with the through hole. A third cover is also provided outside the second cover. An air inlet is formed on the third cover. The air inlet is connected to the through hole through an air intake channel formed by airflow holes or airflow grooves formed on the third cover and the second cover respectively.

9. The exhaust and collection assembly of the miniature vacuum pump as described in claim 8, characterized in that, The third cover has an external exhaust port on its side. The second cover and the adjacent valve plate module form a third noise reduction chamber. The third cover also has a final noise reduction chamber that is connected to the external exhaust port and the third noise reduction chamber respectively. The first noise reduction chamber and the third noise reduction chamber are connected by a second exhaust channel that passes through the two valve plate modules in sequence. The connection between the third noise reduction chamber and the final noise reduction chamber is also provided with a second one-way airflow valve for controlling the airflow to flow unidirectionally from the third noise reduction chamber to the final noise reduction chamber.

10. The exhaust and collection assembly of the miniature vacuum pump as described in claim 9, characterized in that, The final noise reduction chamber forms an opening on the side of the third cover away from the second cover, and the opening is correspondingly sealed and covered by a cover plate. The cover plate, the third cover and the second cover are all formed with shaft holes facing each other so that the output shaft of the drive unit can pass through in sequence. The shaft holes on the third cover and the second cover also constitute part of the air intake channel. The shaft hole of the cover plate is also filled with a sealing ring to seal the gap between the shaft seat of the output shaft and the wall of the shaft hole.

11. A miniature vacuum pump, comprising a collection and exhaust assembly and a drive component for driving the collection and exhaust assembly, characterized in that, The exhaust gas collection assembly is the exhaust gas collection assembly as described in any one of claims 1-10.

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