Pumping device for a micro air pump and micro air pump

Abstract

The application discloses a pumping device for a micro air pump and the micro air pump, and the pumping device comprises a capsule body, the capsule body defines a capsule cavity with an opening facing upward, and the bottom of the capsule cavity is provided with a plurality of air inlet holes penetrating through the thickness thereof; a connecting rod is provided with a push rod for pressing upward or stretching downward the capsule cavity, the push rod is provided with an air channel, the outlet of the air channel is arranged staggeredly with the air inlet holes, the air inlet holes are communicated with the outlet of the air channel in the case that the connecting rod stretches downward the capsule cavity, and the air inlet holes are not communicated with the outlet of the air channel in the case that the connecting rod presses upward the capsule cavity. The pumping device for the micro air pump in the embodiment of the application is characterized in that the air inlet holes in the bottom of the capsule cavity are arranged staggeredly with the outlet of the air channel of the connecting rod, and the air suction and air exhaust of the capsule cavity are realized when the connecting rod drives the capsule body to move synchronously upward and downward, the pumping pressure and flow of the pumping device are improved compared with the conventional pumping mechanism, and the manufacturing cost is low and the assembly process is simple due to the few structural components of the pumping device.

Description

Technical Field

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

[0002] like Figure 1 As shown, the pump body structure of a commercially available miniature air pump 100a typically includes a pump cover 10a, a valve seat 10b, and a cylinder 10c. The pump cover 10a is equipped with an air inlet pipe and an air outlet pipe. The valve seat 10b is equipped with an air inlet valve plate 20a and an air outlet valve plate 20b. The cylinder 10c is equipped with a bladder 30a, which has a bladder cavity and an air inlet. The bladder 30a is driven by a motor to move up and down, thereby changing the volume of the bladder cavity and realizing the process of pumping gas.

[0003] The aforementioned micro air pump 100a has low output air pressure and flow rate, which cannot meet the requirements of large flow and high pressure. In addition, it has many components, high production cost, and complex assembly procedures. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the above-mentioned technical problems.

[0005] Therefore, the present invention proposes a pumping device for a micro air pump, which has high pumping pressure and flow rate, and a simple structure.

[0006] The present invention relates to a miniature air pump, which has high pumping pressure and flow rate, and a simple structure.

[0007] A pumping device for a micro air pump according to a first aspect of the present invention includes: a bladder defining a cavity with an upward opening, the bottom of the cavity having a plurality of air inlets penetrating its thickness; a connecting rod having a push rod for upwardly compressing or downwardly stretching the cavity, the push rod having an air passage, the outlet of the air passage being offset from the air inlets, wherein when the connecting rod stretches the cavity downwardly, the air inlets communicate with the outlet of the air passage; and when the connecting rod compresses the cavity upwardly, the air inlets do not communicate with the outlet of the air passage.

[0008] The pumping device for a micro air pump according to the present invention has an air inlet at the bottom of the bladder cavity that is offset from the outlet of the connecting rod air passage. When the connecting rod drives the bladder to move up and down synchronously, the bladder cavity can be inhaled and vented. Compared with the traditional pumping mechanism, the pumping pressure and flow rate of this pumping device are improved. Moreover, since the pumping device has fewer structural components, its manufacturing cost is low and the assembly process is simple.

[0009] In addition, the pumping device for a micro air pump according to embodiments of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the bottom surface of the cyst cavity is provided with a downwardly extending sleeve, the push rod is inserted into the sleeve, and the top surface of the push rod is in contact with the bottom surface of the cyst cavity.

[0011] In an optional embodiment, the push rod is interference-fitted with the sleeve.

[0012] In an optional embodiment, the center of the connecting rod extends outward to form a plurality of spaced-apart base plates, and the push rod is formed on the top surface of the base plates.

[0013] According to some embodiments of the present invention, the top surface of the bladder cavity is recessed downward to form a thin-walled portion, and the thin-walled portion forms a plurality of the air inlets.

[0014] In an optional embodiment, the thickness d of the thin-walled portion in the vertical direction ranges from 0 to 0.2 mm.

[0015] According to some embodiments of the present invention, the upward displacement of the push rod is greater than the downward displacement.

[0016] In an optional embodiment, the upward displacement of the push rod is greater than the downward displacement.

[0017] In an optional embodiment, the upward displacement of the push rod is in the range of 2-5 mm, and the downward displacement of the push rod is in the range of 1-2 mm.

[0018] In an optional embodiment, the ratio of the upward displacement of the push rod to the total length of the push rod is in the range of 0.6-0.8; the ratio of the downward displacement of the push rod to the total length of the push rod is in the range of 0.1-0.3.

[0019] According to a second aspect of the present invention, a miniature air pump includes the pumping device of the above embodiment, a motor, the drive shaft of the motor being connected to the connecting rod via an eccentric wheel; a cylinder body defining a through hole, a bladder body disposed on the cylinder body and the bladder cavity passing through the through hole, the cylinder body being connected to the motor via a snap-fit ​​mechanism, wherein one of the cylinder body and the motor is provided with a snap-fit ​​mechanism and the other is provided with a slot.

[0020] According to some embodiments of the present invention, an upwardly extending positioning ring is formed around the opening of the bladder cavity, and the micro air pump further includes a pump cover, which is pressed against the flat plate. The pump cover extends downward to form a positioning post, and the positioning ring is sleeved on the positioning post. When the connecting rod presses the bladder cavity upward, the inner wall of the positioning ring separates from the outer wall of the positioning post.

[0021] The miniature air pump according to a second aspect embodiment of the present invention includes the pumping device of the above embodiment. Since the pumping device according to the embodiment of the present invention has a simple structure, low manufacturing cost, and large pumping pressure and flow rate, the miniature air pump according to the embodiment of the present invention has a simple structure, low manufacturing cost, and large pumping pressure and flow rate.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is an exploded view of a micro air pump based on existing technology;

[0025] Figure 2 This is a perspective view of a pumping apparatus according to some embodiments of the present invention;

[0026] Figure 3 yes Figure 1 Exploded view;

[0027] Figure 4 yes Figure 1 A sectional view;

[0028] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 This is a cross-sectional view of a miniature air pump according to some embodiments of the present invention;

[0030] Figure 7 This is an exploded view of a miniature air pump according to some embodiments of the present invention.

[0031] Figure label:

[0032] The existing micro air pump 100a includes: pump cover 10a, valve seat 10b, cylinder body 10c, inlet valve plate 20a, outlet valve plate 20b, bladder body 30a, and motor 40a.

[0033] The miniature air pump 100 of this invention embodiment;

[0034] Pump cover 10; positioning post 11; weight reduction hole 12;

[0035] Cylinder block 20; Clip 21;

[0036] Pumping device 30;

[0037] 31; 311; 3111; 312; 313; 314; 315; 315;

[0038] Link 32; base plate 321; push rod 322; air passage 3221;

[0039] Motor 40; Card slot 41. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] Now refer to Figures 2-7 This describes a pumping device 30 for a micro air pump 100 according to an embodiment of the present invention. The pumping device 30 includes a bladder 31 and a connecting rod 32. The bladder 31 is made of an elastic rubber material.

[0042] Specifically, such as Figures 2-4 As shown, the capsule 31 defines a cavity 311 with an upward-facing opening 3111. The bottom of the cavity 311 has multiple air inlets 312 penetrating its thickness. The connecting rod 32 has a push rod 322 that compresses upward or stretches downward the cavity 311. The push rod 322 has an air passage 3221, the outlet of which is offset from the air inlets 312. Specifically, when the connecting rod 32 stretches the cavity 311 downward, the air inlets 312 communicate with the outlet of the air passage 3221; when the connecting rod 32 compresses the cavity 311 upward, the air inlets 312 do not communicate with the outlet of the air passage 3221.

[0043] In other words, the connecting rod 32 and the bladder body 31 move up and down synchronously, thereby squeezing or stretching the bladder cavity 311, changing the gas volume inside the bladder cavity 311, and selectively connecting the air inlet 312 of the bladder cavity 311 with the outlet of the airway 3221. Specifically, when the bladder body 31 moves downward with the connecting rod 32, the volume of the bladder cavity 311 increases. At this time, the air pressure inside the bladder cavity 311 is less than the air pressure inside the airway 3221. The airflow in the airway 3221 forces at least part of the bottom of the bladder cavity 311 to move upward, thereby connecting the air inlet 312 and the outlet of the airway 3221, and the bladder cavity 311 achieves inhalation. When the bladder body 31 moves upward with the connecting rod 32, the bottom of the bladder cavity 311 does not separate from the top surface of the push rod 322, that is, the air inlet 312 and the outlet of the airway 3221 are not connected. The bladder cavity 311 is squeezed, and the gas inside the bladder cavity 311 is expelled. This cycle repeats repeatedly to achieve the purpose of pumping gas.

[0044] It should be noted that the directional terms such as "upper" and "lower" mentioned in the text are based on the positional relationship in the attached drawings and are not a limitation on the installation position of the pumping device 30.

[0045] In short, the pumping device 30 for the micro air pump 100 of this embodiment of the invention has an air inlet 312 at the bottom of the bladder 311 that is offset from the outlet of the air passage 3221 of the connecting rod 32. When the connecting rod 32 drives the bladder 31 to move up and down synchronously, the bladder 311 is able to inhale and exhale. Compared with the traditional pumping mechanism, the pumping pressure and flow rate of this pumping device 30 are both improved. Moreover, since the pumping device 30 has fewer structural components, its manufacturing cost is low and the assembly process is simple.

[0046] In some alternative embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the bottom surface of the cyst cavity 311 is provided with a downwardly extending sleeve 313, and a push rod 322 is inserted into the sleeve 313, with the top surface of the push rod 322 fitting against the bottom surface of the cyst cavity 311. That is, the sleeve 313 connects the cyst body 31 and the connecting rod 32, so that the connecting rod 32 is linked with the cyst body 31.

[0047] In a further optional embodiment, the push rod 322 and the sleeve 313 are interference-fitted. In this way, the outer wall of the push rod 322 and the inner wall of the sleeve 313 can fit tightly together, which can improve the stability of the fit between the push rod 322 and the sleeve 313, and also ensure that the airflow flows only from inside the air passage 3221.

[0048] In other alternative embodiments of the invention, such as Figure 3 As shown, the connecting rod 32 extends outward from its center to form multiple spaced-apart base plates 321, and push rods 322 are formed on the top surface of the base plates 321. That is, the connecting rod 32 has multiple base plates 321, with the inner ends of the base plates 321 converging at the center of the connecting rod 32, and push rods 322 located on the top surface of the outer ends of the base plates 321. Correspondingly, the bladder 31 also has multiple cavities 311. Through the cooperation of the multiple push rods 322 and the multiple cavities 311, the pumping pressure and flow rate of the pumping device 30 are increased. It should be noted that the connecting rod 32 can be connected to the drive shaft of the motor 40 via an eccentric wheel, allowing the multiple cavities 311 to be squeezed and stretched sequentially, ensuring stable airflow in the pumping device 30.

[0049] In other alternative embodiments of the invention, such as Figure 4 Combination Figure 5As shown, the top surface of the bladder cavity 311 is concave downwards to form a thin-walled portion 314, which forms multiple air inlets 312. When the bladder cavity 311 is stretched, and the air pressure inside the bladder cavity 311 is lower than the air pressure inside the airway 3221, the thin-walled portion 314 is more likely to tilt upwards, thus connecting the air inlets 312 with the outlet of the airway 3221, enabling the bladder cavity 311 to inhale. When the push rod 322 presses the bladder cavity 311 upwards, the thin-walled portion 314 can fit against the bottom surface of the bladder cavity 311, and the thicker part of the bottom wall of the bladder cavity 311 can fit tightly against the periphery of the top surface of the push rod 322, thereby effectively improving the airtightness between the push rod 322 and the bottom of the bladder cavity 311, preventing backflow of air within the bladder cavity 311, and enabling the bladder cavity 311 to expel air. The shape of the air inlets 312 can be circular, square, triangular, or other shapes.

[0050] In an optional example, the thickness d of the thin-walled portion 314 in the vertical direction ranges from 0 to 0.2 mm. For example, the value of d can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, and 0.2 mm. It is understood that the above values ​​are merely illustrative and are not intended to limit the protection of this invention.

[0051] In some alternative embodiments of the present invention, the upward displacement of the push rod 322 is greater than the downward displacement. That is, the pulling amount of the push rod 322 on the bladder 31 is less than the squeezing amount. This ensures that the gas in the bladder cavity 311 is fully emptied, creating a negative pressure state inside as much as possible. With the air inlet 312 communicating with the outlet of the air passage 3221, the bladder cavity 311 can also draw in air. Thus, the process of air intake and exhaust of the pumping device 30 is effectively improved.

[0052] In an optional example, the upward displacement of push rod 322 ranges from 2 to 5 millimeters, and the downward displacement of push rod 322 ranges from 1 to 2 millimeters. Specifically, the upward displacement of push rod 322 can be 2 millimeters, 3 millimeters, 4 millimeters, and 5 millimeters, and the downward displacement of push rod 322 can be 1 millimeter and 2 millimeters. It is understood that the above values ​​are merely illustrative and not intended to limit the scope of this invention.

[0053] In a further optional example, the ratio of the upward displacement of the push rod 322 to its total length ranges from 0.6 to 0.8; the ratio of the downward displacement of the push rod 322 to its total length ranges from 0.1 to 0.3. By reasonably limiting the ratio of the vertical displacement of the push rod 322 to its total length, the bladder cavity 311 can obtain optimal air intake and exhaust volumes.

[0054] Reference Figure 6 and Figure 7 The miniature air pump 100 according to an embodiment of the present invention includes the pumping device 30, the motor 40, and the cylinder 20 described in the above example. Wherein, Figure 6 The arrows in the diagram indicate the direction of airflow.

[0055] Specifically, the pumping device 30 includes a bladder body 31 and a connecting rod 32. The bladder body 31 defines a cavity 311 with an upward-facing opening 3111. The bottom of the cavity 311 has a plurality of air inlets 312 extending through its thickness. The connecting rod 32 has a push rod 322 for upward compression or downward stretching of the cavity 311. The push rod 322 has an air passage 3221. The outlet of the air passage 3221 is offset from the air inlets 312. When the connecting rod 32 stretches the cavity 311 downward, the air inlets 312 communicate with the outlet of the air passage 3221; when the connecting rod 32 compresses the cavity 311 upward, the air inlets 312 do not communicate with the outlet of the air passage 3221.

[0056] The cylinder body 20 defines a through hole, and the bladder body 31 is disposed on the cylinder body 20 with the bladder cavity 311 passing through the through hole. The cylinder body 20 and the motor 40 are connected by a snap-fit ​​21. One of the cylinder body 20 and the motor 40 has a snap-fit ​​21, and the other has a slot 41. A fitting gap is formed between the slot 41 and the snap-fit ​​21, and the fitting gap communicates with the air passage 3221. For example, as Figure 6 and Figure 7 The cylinder body 20 is provided with a downwardly extending buckle 21, and the side wall of the motor 40 is provided with a slot 41. There is a gap between the buckle 21 and the side wall of the cylinder body 20, which communicates with the air passage 3221, that is, external gas is delivered to the air passage 3221 through the gap.

[0057] In further optional embodiments, such as Figures 2-3 Combination Figure 6 As shown, a positioning ring 315 extending upward is formed around the opening 3111 of the bladder cavity 311. The micro air pump 100 also includes a pump cover 10, which is pressed onto a flat plate. A positioning post 11 extends downward from the pump cover 10. The positioning ring 315 is sleeved on the positioning post 11. When the connecting rod 32 presses the bladder cavity 311 upward, the inner wall of the positioning ring 315 separates from the outer wall of the positioning post 11.

[0058] Specifically, through the separable engagement of the positioning ring 315 and the positioning post 11, when the connecting rod 32 stretches the bladder cavity 311, the positioning ring 315 and the positioning post 11 are tightly fitted, and gas enters the bladder cavity 311 through the air inlet 312; when the connecting rod 32 compresses the bladder cavity 311, the positioning ring 315 and the positioning post 11 separate, the air inlet 312 is not connected to the outlet of the air passage 3221, and gas is discharged from the bladder cavity 311. In other words, when the micro air pump 100 is in operation, the bladder cavity 311 is connected to the outside only in one place (the air inlet 312 or when the positioning ring 315 is separated from the positioning post 11), thus ensuring that the bladder cavity 311 can normally inhale and exhale.

[0059] In an optional example, the top surface of the pump cover 10 has a plurality of weight-reducing holes 12. The weight-reducing holes 12 are recessed downward to form a groove, thereby reducing the overall weight of the micro air pump 100.

[0060] The miniature air pump 100 according to an embodiment of the present invention includes the pumping device 30 of the above embodiment. Since the pumping device 30 according to the embodiment of the present invention has a simple structure, low manufacturing cost, and large pumping pressure and flow rate, the miniature air pump 100 according to the embodiment of the present invention has a simple structure, low manufacturing cost, and large pumping pressure and flow rate.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A pumping device for a micro gas pump, characterized by, include: A sac, the sac defining a cavity with an upward opening, the bottom of the cavity having a plurality of air inlets extending through its thickness; The connecting rod is equipped with a push rod that compresses upward or stretches downward the bladder cavity. The push rod is equipped with an air passage. The outlet of the air passage is offset from the air inlet. When the connecting rod stretches the bladder cavity downward, the air inlet communicates with the outlet of the air passage. When the connecting rod compresses the bladder cavity upward, the air inlet does not communicate with the outlet of the air passage. The top surface of the bladder cavity is recessed downward to form a thin-walled portion, and the thin-walled portion forms a plurality of air inlets; the bottom surface of the bladder cavity is provided with a downwardly extending sleeve, the push rod is inserted into the sleeve, and the top surface of the push rod is in contact with the bottom surface of the bladder cavity.

2. The pumping arrangement for a micro gas pump according to claim 1, characterized in that, The push rod is interference-fitted with the sleeve.

3. The pumping device for a micro gas pump according to claim 1, wherein The center of the connecting rod extends outward to form a plurality of spaced-apart base plates, and the push rod is formed on the top surface of the base plates.

4. The pumping device for a micro gas pump according to claim 1, wherein The thickness d of the thin-walled portion in the vertical direction ranges from 0 to 0.2 mm.

5. The pumping arrangement for a micro gas pump according to claim 1, characterized in that, The upward displacement of the push rod is greater than the downward displacement.

6. The pumping arrangement for a micro gas pump according to claim 5, characterized in that, The upward displacement of the push rod ranges from 2 to 5 millimeters, and the downward displacement of the push rod ranges from 1 to 2 millimeters.

7. The pumping arrangement for a micro gas pump according to claim 5, characterized in that, The ratio of the upward displacement of the push rod to the total length of the push rod is in the range of 0.6-0.8; the ratio of the downward displacement of the push rod to the total length of the push rod is in the range of 0.1-0.

3.

8. A micro gas pump characterized by comprising: include: The pumping device according to any one of claims 1-7; An electric motor, wherein the drive shaft of the electric motor is connected to the connecting rod via an eccentric wheel; The cylinder body defines a through hole, the bladder body is disposed on the cylinder body and the bladder cavity passes through the through hole, the cylinder body and the motor are connected by a snap-fit ​​method, one of the cylinder body and the motor is provided with a snap-fit, and the other is provided with a slot.

9. The micropump according to claim 8, characterized in that The opening of the bladder cavity forms an upwardly extending positioning ring. The micro air pump also includes a pump cover, which is pressed onto a flat plate. The pump cover extends downward to form a positioning post, and the positioning ring is sleeved on the positioning post. When the connecting rod presses the bladder cavity upward, the inner wall of the positioning ring separates from the outer wall of the positioning post.

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