Integrated air charging and discharging structure and air pump with same

Abstract

This utility model discloses an integrated inflation and deflation structure, comprising a base, a cover, and an elastic valve plate sealed between the base and the cover. The base has an air inlet chamber covered by the elastic valve plate and an air inlet channel communicating with the air inlet chamber. The cover has an air outlet chamber covered by the elastic valve plate, a protruding structure protruding from the air outlet chamber, an air outlet channel communicating with the air outlet chamber, and an exhaust channel penetrating the protruding structure. The elastic valve plate has a valve portion for engaging with the protruding structure and an inflation hole offset from the air inlet chamber. The base has a mating portion for engaging with the inflation hole; wherein, when the elastic valve plate deforms and shifts closer to the protruding structure, closing the exhaust channel with the valve portion, the mating portion opens the inflation hole. This integrated inflation and deflation structure has the advantages of simple structure, small size, and low inflation flow loss. Furthermore, this utility model also discloses an air pump including this integrated inflation and deflation structure.

Description

Technical Field

[0001] This utility model relates to the technical field of blood pressure monitors, and in particular to an integrated inflation and deflation structure for use in blood pressure monitors and an air pump having the integrated inflation and deflation structure. Background Technology

[0002] A miniature air pump is a pump with a reduced size. The size of a miniature air pump depends on the size of each component. Miniature air pumps are widely used in blood pressure monitors.

[0003] In existing air pumps with integrated inflation and deflation, an exhaust valve is installed in the chamber to control the opening and closing of the exhaust passage. The exhaust valve divides the chamber into an intake chamber and an exhaust chamber, which are connected by a one-way valve. The exhaust chamber connects to the outlet passage and the exhaust passage. The intake chamber connects to the intake passage and the micro-leakage passage. During inflation, the high-pressure gas in the intake chamber causes the one-way valve to open and the exhaust valve to close the exhaust passage, allowing gas in the intake chamber to flow into the exhaust chamber through the one-way valve and out through the outlet passage, thus inflating the target (e.g., an airbag). During deflation, the air pump stops pumping, the one-way valve closes, and the gas in the intake chamber leaks through the micro-leakage passage, reducing the pressure in the intake chamber. This causes the exhaust valve to open the exhaust passage, allowing gas in the target (e.g., an airbag) to escape through the exhaust passage.

[0004] However, existing air pumps with integrated inflation and deflation require a micro-leakage channel and two independently operating one-way valves and an exhaust valve to complete the inflation and deflation process, resulting in a complex structure and increased size. Furthermore, during inflation, some gas leaks out of the chamber through the micro-leakage channel, causing a loss of inflation flow, which in turn increases the power consumption of the rotary motor, resulting in greater noise.

[0005] Therefore, there is an urgent need for an integrated inflation and deflation structure and an air pump having the integrated inflation and deflation structure to overcome one or more of the above-mentioned defects. Utility Model Content

[0006] One objective of this invention is to provide an integrated inflation and deflation structure that is simple in structure, small in size, and has low inflation flow loss.

[0007] Another objective of this invention is to provide an integrated air pump for filling and emptying that is simple in structure, small in size, and has low air flow loss.

[0008] To achieve the above objectives, the present invention provides an integrated inflation and deflation structure comprising a base, a cover, and an elastic valve plate that is sealed between the base and the cover and is capable of elastic deformation and displacement. The base has an air inlet chamber facing and covered by the elastic valve plate, and an air inlet channel communicating with the air inlet chamber. The cover has an air outlet chamber facing and covered by the elastic valve plate, a protruding structure protruding into the air outlet chamber towards the elastic valve plate, an air outlet channel communicating with the air outlet chamber, and an exhaust channel penetrating the protruding structure. The elastic valve plate has a valve portion for engaging with the protruding structure and an inflation hole offset from the air inlet chamber. The base has a mating portion for engaging with the inflation hole; wherein, when the elastic valve plate deforms and displaces towards the protruding structure, causing the valve portion to close the exhaust channel, the mating portion opens the inflation hole.

[0009] Compared to existing technologies, this design features a valve portion on the elastic valve plate that engages with the protruding structure and an inflation port offset from the air inlet chamber. This design ensures that the inflation port and valve portion are linked during the deformation and displacement of the elastic valve plate, and the seat has a mating portion for engaging with the inflation port. Therefore, during inflation, because the pressure in the air inlet chamber is greater than the pressure in the air outlet chamber, the elastic valve plate deforms closer to the protruding structure. This causes the valve portion on the elastic valve plate to close the exhaust passage, and the mating portion opens the inflation port when the valve portion closes the exhaust passage. This allows the gas in the inflation chamber to be expelled through the inflation passage, achieving the purpose of inflating the target (e.g., an airbag). When inflation stops, since no pumped airflow enters the air inlet chamber, the pressure in the air inlet and air outlet chambers tends to balance due to the connection of the inflation port. At this time, the elastic valve plate rebounds, causing the valve portion to gradually open the exhaust passage, allowing the gas in the target (e.g., an airbag) to flow out through the exhaust passage via the air outlet chamber. Therefore, the integrated inflation and deflation structure of this utility model has a simple structure, small size, and low inflation flow loss.

[0010] Preferably, the valve portion also protrudes toward the protruding structure.

[0011] Preferably, the resilient valve plate has a clamping edge for the seat and the cover to be jointly sealed and clamped, the inflation hole is adjacent to the clamping edge, and the valve portion is away from the clamping edge.

[0012] Preferably, the valve portion closes the exhaust passage by covering the inlet of the exhaust passage and pressing the end face of the protruding structure against the elastic valve plate.

[0013] Preferably, the outlet of the intake passage is aligned with the inlet of the exhaust passage.

[0014] Preferably, both the intake passage and the exhaust passage are straight passages.

[0015] Preferably, the end face of the protruding structure facing the elastic valve plate is an inclined surface arranged around the inlet of the exhaust channel.

[0016] Preferably, during the resetting process of the elastic valve plate away from the protruding structure, the valve part opens the exhaust passage, and the mating part closes the inflation hole when it is pressed face-to-face with the elastic valve plate.

[0017] Preferably, the mating part is a flat surface.

[0018] Preferably, the elastic valve plate is further provided with a thinning groove that extends through the elastic valve plate on one side. The thinning groove is adjacent to the clamping edge, and the inflation hole and valve part are located at the position where the elastic valve plate is thinned by the thinning groove.

[0019] Preferably, the inflation chambers are two separate chambers, each corresponding to an exhaust channel, a protruding structure, a valve, an inflation hole, an air inlet chamber, and a mating part. The two inflation chambers are connected in series via a corresponding air inlet chamber. The exhaust channel is connected to the inflation chamber at the end of the series connection, and the air inlet channel is connected to an air inlet chamber corresponding to the inflation chamber at the beginning of the series connection.

[0020] To achieve the above objectives, the air pump of this utility model includes a rotary motor, a cylinder connected to the rotary motor, the aforementioned integrated inflation and deflation structure, and a linkage mechanism and a bladder assembled in the cylinder. The rotary motor drives the bladder to perform an air delivery movement through the linkage mechanism, and the bladder is also provided with a check valve plate for preventing the gas in the air intake channel from flowing back into the bladder.

[0021] Compared with the prior art, since the air pump of this utility model includes the aforementioned integrated inflation and deflation structure, it also has the advantages of simple structure, small size, and low inflation flow loss. The low inflation flow loss reduces the power requirement of the motor, allowing the air pump of this utility model to be further miniaturized.

[0022] To achieve the above objectives, the air pump of this utility model includes a rotary motor, a cylinder connected to the rotary motor, an external charging / discharging device, the aforementioned integrated charging / discharging structure, a connecting rod mechanism, and a bladder assembled in the cylinder. The bladder is also provided with a check valve to prevent backflow of gas from the intake channel into the bladder. The external charging / discharging device is stacked with the cover and has an external delivery channel, an external discharge channel, a first chamber communicating with the outlet channel, a second chamber communicating with both the external delivery channel and the external discharge channel, a mating structure located in the first chamber, and a separating valve that separates the first chamber and the second chamber and is elastically deformable and displaceable. The separating valve has a connecting hole connecting the first chamber and the second chamber. When the air pump is charging, the mating structure opens the connecting hole, and the separating valve closes the external discharge channel. When the air pump stops working, the separating valve opens the external discharge channel, and the mating structure closes the connecting hole.

[0023] Compared with existing technologies, since the air pump of this invention includes the aforementioned integrated inflation and deflation structure, it also has the advantages of simple structure, small size, and low inflation flow loss. The low inflation flow loss reduces the power requirement of the motor, allowing for a more compact air pump. Furthermore, the design of the external inflation and deflation device enables faster deflation speed. Attached Figure Description

[0024] Figure 1 This is a plan view of the air pump in the first embodiment of the present invention when it is not in operation (i.e., in the initial position).

[0025] Figure 2 It is along Figure 1 Internal view of the section cut along line AA.

[0026] Figure 3 yes Figure 2 Internal diagram of the integrated filling and exhaust structure.

[0027] Figure 4 yes Figure 1 An exploded three-dimensional view of the integrated filling and emptying structure in the air pump shown.

[0028] Figure 5 yes Figure 4 A three-dimensional exploded view from another angle.

[0029] Figure 6 yes Figure 2 The diagram shows the air pump in the inflation state and the internal structure of the air bladder.

[0030] Figure 7 yes Figure 6 Enlarged view of section B.

[0031] Figure 8 yes Figure 2 The diagram shows the air pump starting to expel air and the internal structure of the airbag.

[0032] Figure 9 yes Figure 8 An enlarged view of part C in the image.

[0033] Figure 10 This is a plan view of the air pump in the second embodiment of the present invention when it is not in operation.

[0034] Figure 11 It is along Figure 10 Internal view of the section cut along the DD line.

[0035] Figure 12 yes Figure 11 Internal diagram of the integrated filling and exhaust structure.

[0036] Figure 13 yes Figure 10 An exploded three-dimensional view of the integrated filling and emptying structure in the air pump shown.

[0037] Figure 14 yes Figure 13 A three-dimensional exploded view from another angle.

[0038] Figure 15 yes Figure 11 The diagram shows the air pump in the inflation state and the internal structure of the air bladder.

[0039] Figure 16 yes Figure 15 Enlarged view of section E in the middle.

[0040] Figure 17 yes Figure 11 The diagram shows the air pump starting to expel air and the internal structure of the airbag.

[0041] Figure 18 yes Figure 17 An enlarged view of part F in the image.

[0042] Figure 19 This is an internal view of the air pump in the third embodiment of the present invention when it is not in operation.

[0043] Figure 20 yes Figure 19 The diagram shows the air pump in the inflation state and the internal structure of the air bladder.

[0044] Figure 21 yes Figure 19 The diagram shows the air pump in the initial exhaust phase and the internal structure of the airbag. Detailed Implementation

[0045] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0046] Please see Figure 1 and Figure 2 The air pump 1000 of the first embodiment includes an integrated inflation and deflation structure 100, a rotary motor 200, a cylinder 300 connected to the rotary motor 200, a linkage mechanism 400 and a bladder 500 assembled in the cylinder 300. The rotary motor 200 drives the bladder 500 to perform an air delivery movement through the linkage mechanism 400. The bladder 500 is also provided with a check valve plate 510 for preventing the backflow of gas in the air intake channel 12 (mentioned below) into the bladder 500; so that under the action of the check valve plate 510, only the bladder 500 is allowed to deliver gas to the air intake channel 12, and the backflow of gas in the air intake channel 12 into the bladder 500 is prevented, thereby ensuring the reliability of the air pump 1000 of the first embodiment. Furthermore, Figure 2 , Figure 6 and Figure 8 As an example, the periphery 520 of the bladder 500 is clamped between the cylinder 300 and the seat 10 of the integrated inflation / deflation structure 100 (mentioned below) to achieve a sealed fit between the cylinder 300, the periphery 520 of the bladder 500, and the seat 10. Furthermore, since the connection between the cylinder 300 and the rotary motor 200, the installation of the linkage mechanism 400 and the bladder 500 within the cylinder 300, and the specific structures of the linkage mechanism 400 and the bladder 500 are well known in the art, they will not be described in detail here.

[0047] Combined Figures 3 to 5 The integrated inflation and deflation structure 100 includes a seat 10, a cover 20, and an elastic valve plate 30 that is sealed between the seat 10 and the cover 20 and can elastically deform and displace. Since the elastic valve plate 30 is made of a flexible elastic material, the elastic valve plate 30 naturally seals with the seat 10 and the cover 20 respectively. For example, the seat 10, the elastic valve plate 30, and the cover 20 can be locked together by fasteners. The fasteners can also pass through the bladder 500 and be threaded to the cylinder 300 to achieve the purpose of locking the integrated inflation and deflation structure 100, the bladder 500, and the cylinder 300 together while reducing the use of fasteners. Obviously, other fixing methods known in the art can also be used according to actual needs.

[0048] Meanwhile, the seat 10 is provided with an air inlet chamber 11 facing and covered by the elastic valve plate 30, and an air inlet channel 12 communicating with the air inlet chamber 11, so as to meet the need for the gas delivered by the bladder 500 to enter the air inlet chamber 11 through the air inlet channel 12; optionally, in Figures 2 to 4In this example, there is one intake chamber 11. Obviously, depending on actual needs, the number of intake chambers 11 can be other, for example... Figure 12 The two shown are therefore not considered. Figures 2 to 4 The above is the limit.

[0049] Furthermore, the cover 20 is provided with an air outlet chamber 21 facing and covered by the elastic valve plate 30, a protruding structure 22 protruding into the air outlet chamber 21 in a direction close to the elastic valve plate 30, an air outlet passage 23 communicating with the air outlet chamber 21, and an exhaust passage 24 also penetrating the protruding structure 22. Optionally, in Figure 2 , Figure 3 and Figure 5 As an example, the inlet 241 of the exhaust passage 24 is located on the end face 221 of the protruding structure 22 facing the elastic valve plate 30, which makes it easier for the valve part 31 to open and close the exhaust passage 24 as described below.

[0050] The elastic valve plate 30 is provided with a valve portion 31 for cooperating with the protruding structure 22 and an inflation port 32 offset from the air inlet chamber 11. Optionally, in Figure 4 and Figure 5 In this example, the inflation hole 32 is a round hole to facilitate its manufacture; obviously, depending on actual needs, the inflation hole 32 can also be other shapes of holes known in the art. Furthermore, the valve portion 31 protrudes towards the protruding structure 22; obviously, depending on actual needs, the valve portion 31 can also be arranged without protruding towards the protruding structure 22, therefore... Figure 4 and Figure 5 As shown. At this time, the seat 10 has a mating part 13 for engaging with the inflation port 32; alternatively, it may be... Figures 2 to 4 In this example, the mating part 13 is a flat surface. This facilitates the manufacturing of the mating part 13 on the seat 10, and also allows the mating part 32 to close the inflation hole 32 by covering it and pressing it against the elastic valve plate 30. Obviously, the mating part 32 can have other structures depending on actual needs, so it is not considered... Figures 2 to 4 The above is the limit.

[0051] Therefore, during the deformation displacement of the elastic valve plate 30 towards the protruding structure 22, the driving force for this deformation displacement comes from the pressure difference. This is because the bladder 500, driven by the rotary motor 200, supplies gas to the air intake channel 12, causing the pressure in the air intake chamber 11 to increase and become greater than that in the air outlet chamber 21. This causes the elastic valve plate 30 to undergo elastic deformation displacement towards the protruding structure 22. During this elastic deformation displacement, the valve part 31 closes the exhaust channel 24, and the mating part 13 opens the inflation port 32 when the valve part 31 closes the exhaust channel 24, thereby achieving the target (e.g., Figure 6 The purpose of inflating the airbag (600) and the direction of airflow during inflation are shown in the image. Figure 6 and Figure 7 As indicated by the dashed header; during the resetting process of the elastic valve plate 30 away from the protruding structure 22, the power for this resetting comes from the resetting elastic force of the elastic valve plate 30, causing the valve part 31 to open the exhaust passage 24, thereby achieving the target (see...). Figure 8 The purpose of venting the airbag (600) in the middle, and the direction of the venting airflow are shown in the figure. Figure 8 and Figure 9 As indicated by the dashed line, the inflation port 32 is closed when the elastic valve plate 30 returns to its original position and is in full contact with the mating part 13. (See the image for the state shown.) Figure 3 As shown. More specifically, see the description below.

[0052] Combination Figures 2 to 9 As an example, the resilient valve plate 30 has a clamping edge 33 for the seat 10 and cover 20 to jointly seal and clamp. This clamping edge 33 is adjacent to the inflation port 32, while the valve portion 31 is away from the clamping edge 33. This design results in greater deflection at the location of the valve portion 31 and less deflection at the location of the inflation port 32. This means that the mating part 13 opens the inflation port 31 less when the valve portion 31 closes the exhaust passage 34. Therefore, even slow inflation can ensure the closure of the exhaust passage 24, preventing air leakage from the exhaust passage 24 and further reducing the power requirements of the rotary motor 200, thereby reducing noise. Furthermore, regarding... Figures 2 to 4 and Figures 6 to 9 As an example, the elastic valve plate 30 is further provided with a thinning groove 34 that penetrates one side (e.g., the upper side). The thinning groove 34 is adjacent to the clamping edge 33 of the elastic valve plate 30. The inflation hole 32 and the valve part 31 are located at the position 30a where the elastic valve plate 30 is thinned by the thinning groove 34, so that the elastic valve plate 30 assembled between the seat 10 and the cover 20 only undergoes elastic deformation displacement at this position 30a. Alternatively, in Figure 2 In this example, the valve part 31 is located at the middle of the position 30a where the elastic valve plate 30 is thinned by the thinning groove 34, and the air inlet 32 ​​is located at the edge of the position 30a where the elastic valve plate 30 is thinned by the thinning groove 34, further improving the sensitivity and reliability of the valve part 31 in opening and closing the exhaust passage 24. It should be noted that when the upper side of the thinning groove 34 penetrates the elastic valve plate 30, the groove opening 341 of the thinning groove 34 faces the cover 20, that is, the groove opening 341 of the thinning groove 34 is related to the direction in which the thinning groove 34 penetrates the elastic valve plate 30.

[0053] like Figures 1 to 2 and Figures 6 to 9As shown, as an example, the inlet 241 of the exhaust passage 24 is located on the end face 221 of the protruding structure 22 facing the elastic valve plate 30; the valve part 31 closes the exhaust passage 24 by covering the inlet 241 of the exhaust passage 24 and pressing against the end face 221 of the protruding structure 22 facing the elastic valve plate 30; this design simplifies the structure of the valve part 31 for opening and closing the exhaust passage 24; alternatively, further... Figure 5 As an example, the end face 221 of the protruding structure 22 facing the elastic valve plate 30 is an inclined surface arranged around the inlet 241 of the exhaust passage 24. Through the cooperation between the valve part 31 and the inclined surface, it is easier for the valve part 31 to open the exhaust passage 24 during the exhaust process, thus better ensuring the reliability of the exhaust. To better cooperate with the inclined surface, Figure 3 In this example, the end face 311 of the valve portion 31 facing the protruding structure 22 is a flat surface. Furthermore, in... Figure 1 , Figure 3 and Figures 6 to 9 In this example, the outlet 121 of the intake passage 12 is aligned with the inlet 241 of the exhaust passage 24 so that the valve 31 can close the exhaust passage 24 more quickly during slow inflation. Furthermore, Figure 1 , Figure 3 and Figures 6 to 9 In this example, the intake passage 12 and the exhaust passage 24 are both straight passages to facilitate their manufacture; the exhaust passage 23 is arranged vertically.

[0054] Combination Figures 1 to 9 The inflation and deflation processes of the air pump 1000 in the first embodiment will be described below: During inflation, the gas supplied by the bladder 500 flows into the intake chamber 11 through the intake channel 12, increasing the pressure in the intake chamber 11. The elastic valve plate 30 (specifically, the position 30a where the elastic valve plate 30 is thinned by the thinning groove 34) is compressed and deformed towards the protruding structure 22. This causes the valve portion 31 of the elastic valve plate 30 to cover the inlet 241 of the exhaust channel 24 and press against the end face 221 of the protruding structure 22, thereby closing the exhaust channel 24. The inflation hole 32 on the elastic valve plate 30 is opened due to its distance from the mating part 13, connecting the intake chamber 11 and the exhaust chamber 21. At this time, the airflow flows through the intake chamber 11, through the inflation hole 32, into the exhaust chamber 21, and then out through the exhaust channel 23 to inflate the airbag 600. The gas flow direction is shown in the figure. Figure 6 and Figure 7 As indicated by the dashed arrow.

[0055] When inflation stops, no airflow enters the intake chamber 11, and the pressure in the intake chamber 11 and exhaust chamber 21 tends to balance due to the connection of the inflation port 32. At this time, the elastic valve plate 30 (specifically, the position 30a of the elastic valve plate 30 thinned by the thinning groove 34) rebounds, and the valve part 31 gradually opens the inlet 241 of the exhaust passage 24, allowing the gas in the airbag 600 to flow through the exhaust chamber 21 and out of the exhaust passage 24; at the same time, the gas in the intake chamber 11 flows into the exhaust chamber 21 through the inflation port 32 and out through the exhaust passage 24, and the gas flow direction is shown in the figure. Figure 8 and Figure 9 The header is indicated by a dashed line.

[0056] As the gas is discharged, the pressure in the intake chamber 11 and the exhaust chamber 21 decreases, the elastic valve plate 30 rebounds more significantly, and the exhaust passage 24 opens more fully. When the pressure inside the chamber balances with the external pressure, the elastic valve plate 30 returns to its original position, as shown in the diagram. Figure 2 and Figure 3 As shown.

[0057] Please see Figures 10 to 18 The air pump 1000' of the second embodiment has a basically the same structure as the air pump 1000 of the first embodiment, and the differences are described below.

[0058] (1) In the air pump 1000' of the second embodiment, the air chambers 21 of the cover 20' of its integrated air-filling and air-filling structure 100' are two separate air chambers 21, each air chamber 21 corresponding to an exhaust channel 24, a protruding structure 22, a valve part 31, an air inlet 32, an air inlet chamber 11, and a mating part 13. At this time, the two air chambers 21 are connected by a corresponding air inlet chamber 11 (see Figure 12 The two inflation chambers 21 are connected in series via a corresponding air inlet chamber 11 and a connecting hole 35 on the elastic valve plate 30'. The air outlet channel 23 is connected to the inflation chamber 21 at the end of the series connection (see Figure 12 The rightmost inflation chamber 21 is connected, and the air intake passage 12 is connected to an air intake chamber 11, which is connected to the inflation chamber 21 at the beginning of the series connection (see Figure 12 Corresponding to the left-hand inflation chamber 21, that is, the air intake channel 12 is... Figure 12 The air intake chamber 11 on the left side of the middle seat 10 is connected.

[0059] In the air pump 1000 of the first embodiment, there is only one air chamber 21, and there is a corresponding exhaust channel 24, a protruding structure 22, an air inlet chamber 11, an air inlet 32, a valve part 31 and a mating part 13. In addition, the elastic valve plate 30 in the air pump 1000 of the first embodiment does not have a connecting hole 35.

[0060] Apart from the differences mentioned above, the other two are the same, so they will not be repeated here. Specifically, by connecting the inflation chambers 21 in series, the airbag 600 can be rapidly deflated.

[0061] Combined Figures 9 to 18 The inflation and deflation process of the air pump 1000' in the second embodiment will be described below: During inflation, the gas delivered by the bladder 500 flows into the left intake chamber 11 through the intake channel 12, increasing the pressure in the left intake chamber 11. The elastic valve plate 30, thinned by the left thinning groove 34, is compressed and deformed towards the protruding structure 22 on the left, causing the valve portion 31 on the left side of the elastic valve plate 30 to cover the inlet 241 of the left exhaust channel 24 and press against the end face 221 of the left protruding structure 22, thereby closing the left exhaust channel 24. The inflation port 32 on the left side of the elastic valve plate 30 is opened away from the left mating part 13, so that the left inflation port 32 connects the left air inlet chamber 11 and the left air outlet chamber 21; at this time, the airflow flows from the left air inlet chamber 11 into the left air outlet chamber 21 through the left inflation port 32, and enters the right air inlet chamber 11 through the connecting hole 35, which increases the pressure in the right air inlet chamber 11. As a result, the position 30a of the elastic valve plate 30 thinned by the right thinning groove 34 is deformed and displaced towards the protruding structure 22 on the right side, so that the right side of the elastic valve plate 30... The valve part 31 on the side closes the right exhaust passage 24 by covering the inlet 241 of the right exhaust passage 24 and pressing against the end face 221 of the right protruding structure 22. The inflation hole 32 on the right side of the elastic valve plate 30 is opened away from the right mating part 13, so that the right inflation hole 32 connects the right air inlet chamber 11 and the right air outlet chamber 21. The gas flowing into the right air inlet chamber 11 flows into the right air outlet chamber 21 through the right inflation hole 32, and then flows out from the right air outlet passage 23 to inflate the airbag 600. The gas flow direction is shown in the figure. Figure 15 and Figure 16 As indicated by the dashed arrow.

[0062] When inflation stops Figure 17 The pressure in the left intake chamber 11 and the left exhaust chamber 21 gradually tends to reach equilibrium. Figure 17 When the elastic valve plate 30 in the middle is thinned by the left thinning groove 34 at position 30a, it rebounds and causes the left valve part 31 to open the inlet 241 of the left exhaust passage 24. At this time, the gas in the right intake chamber 11 flows through the connecting hole 35 and the left exhaust chamber 21 and is discharged through the left exhaust passage 24.

[0063] The gas pressure in the right intake chamber 11 drops rapidly. Under the pressure difference, the elastic valve plate 30, thinned by the right thinning groove 34, is pushed down and displaced significantly. This causes the right exhaust passage 24 to open significantly while the right inflation port 32 is forced closed. This allows the gas inside the airbag 600 to flow through the right exhaust chamber 21 and be rapidly discharged from the right exhaust passage 24. The gas flow direction is shown in the diagram. Figure 17 and Figure 18 The dashed header is shown in the figure.

[0064] Please see Figures 19 to 21 The air pump 1000 in the third embodiment has a basically the same structure as the air pump 1000 in the first embodiment. The differences are described below.

[0065] First, in the air pump 1000'' of the third embodiment, a charging / discharging device 700 is also included, which is stacked on the cover 20' of the integrated charging / discharging structure 100'. The charging / discharging external device 700 is stacked on the cover 20', and has an external delivery channel 710, an external discharge channel 720, a first chamber 730 communicating with the air outlet channel 23, a second chamber 740 communicating with both the external delivery channel 710 and the external discharge channel 720, a mating structure 750 located in the first chamber 730, and a separating valve plate 760 that separates the first chamber 730 and the second chamber 740 and is elastically deformable and displaceable. The separating valve plate 760 has a connecting hole 761 that connects the first chamber 730 and the second chamber 740. Therefore, when the air pump 1000 is inflating, the cooperating structure 750 opens the connecting hole 761, and the separating valve plate 760 closes the external discharge channel 720; when the air pump 1000 stops working, the separating valve plate 760 opens the external discharge channel 720, and the cooperating structure 750 closes the connecting hole 761. Specifically, the cooperating structure 750 closes the connecting hole 761 when it is in surface-to-surface contact with the separating valve plate 760, as shown in the diagram. Figure 19 As shown; therefore, with the help of the charging and degassing device 700 and the integrated charging and degassing structure 100', the air pump 1000'' of the third embodiment has a two-stage degassing function, thus achieving the purpose of rapid degassing.

[0066] However, the air pump 1000 in the first embodiment does not have an air filling and air emptying device 700.

[0067] The air pump 1000 in the second and third embodiments differs from the air pump 1000 in the first embodiment in terms of the shape of its inflation channel 23, exhaust channel 24, and intake channel 12.

[0068] Third, in the air pump 1000'' of the third embodiment, the periphery 520 of the bladder 500 is clamped between the seat 10' and the cover 20'; in the air pump 1000 of the first embodiment, the periphery 520 of the bladder 500 is clamped between the cylinder 300 and the seat 10.

[0069] Apart from the differences mentioned above, the two are the same, so they will not be repeated here.

[0070] In the third embodiment, the airflow direction during inflation in the air pump 1000 is shown below. Figure 20 As shown by the dashed line in the figure, the airflow direction during exhaust is shown in the figure. Figure 21 The dashed header is shown in the figure.

[0071] Compared with the prior art, since the elastic valve plate 30 (30') is provided with a valve part 31 for cooperating with the protruding structure 22 and an inflation hole 32 that is offset from the air inlet chamber 11, this design makes the inflation hole 32 and the valve part 31 linked (interlocked) during the deformation displacement of the elastic valve plate 30 (30'), and the seat 10 has a mating part 13 for cooperating with the inflation hole 32; therefore, during the inflation process, since the pressure in the air inlet chamber 11 is greater than the pressure in the air outlet chamber 21, the elastic valve plate 30 (30') deforms and shifts closer to the protruding structure 22, and during this deformation displacement, the elastic valve plate 30 (30')... The inflation port 32 on the airbag detaches from the mating part 13 and opens. At the same time, the valve part 31 on the elastic valve plate 30 (30') closes the exhaust passage 24, thereby allowing the gas in the inflation chamber 21 to be sent out through the inflation passage 23, achieving the purpose of inflating the target (e.g., the airbag 600). When inflation stops, since no pumped airflow enters the intake chamber 11, the pressure in the intake chamber 11 and the exhaust chamber 21 tends to be balanced due to the connection of the inflation port 32. At this time, the elastic valve plate 30 (30') rebounds, and the valve part 31 gradually opens the exhaust passage 24, allowing the gas in the airbag 600 to flow out through the exhaust passage 24 via the exhaust chamber 21. Therefore, the integrated inflation and deflation structure 100 has a simple structure, small size, and low inflation flow loss, allowing the air pump to be further miniaturized.

[0072] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. An integrated inflation and deflation structure, comprising a base, a cover, and an elastic valve plate that is sealed between the base and the cover and is capable of elastic deformation and displacement; the base has an air inlet chamber facing and covered by the elastic valve plate and an air inlet channel communicating with the air inlet chamber; the cover has an air outlet chamber facing and covered by the elastic valve plate, a protruding structure protruding into the air outlet chamber in a direction close to the elastic valve plate, an air outlet channel communicating with the air outlet chamber, and an exhaust channel also penetrating the protruding structure, characterized in that... The elastic valve plate is provided with a valve part that cooperates with the protruding structure and an inflation hole that is offset from the air inlet chamber. The seat has a mating part for cooperating with the inflation hole. When the elastic valve plate deforms and moves closer to the protruding structure and closes the exhaust passage with the valve part, the mating part opens the inflation hole.

2. The integrated inflation and deflation structure according to claim 1, characterized in that, The resilient valve plate has a clamping edge for the seat and the cover to be jointly sealed and clamped, the air hole is adjacent to the clamping edge, and the valve portion is away from the clamping edge.

3. The integrated inflation and deflation structure according to claim 1, characterized in that, The inlet of the exhaust passage is located on the end face of the protruding structure facing the elastic valve plate. The valve part closes the exhaust passage by covering the inlet of the exhaust passage and pressing the end face of the protruding structure facing the elastic valve plate face to face.

4. The integrated inflation and deflation structure according to claim 3, characterized in that, The outlet of the air intake channel is aligned with the inlet of the exhaust channel; both the air intake channel and the exhaust channel are straight channels. The end face of the protruding structure facing the elastic valve plate is an inclined surface arranged around the inlet of the exhaust channel.

5. The integrated inflation and deflation structure according to claim 1, characterized in that, During the process of the elastic valve plate resetting away from the protruding structure, the valve part opens the exhaust passage, and the mating part closes the inflation hole when it is pressed face-to-face with the elastic valve plate.

6. The integrated inflation and deflation structure according to claim 1, characterized in that, The valve portion also protrudes towards the protruding structure; the mating portion is a flat surface.

7. The integrated inflation and deflation structure according to claim 2, characterized in that, The elastic valve plate is also provided with a thinning groove that penetrates one side of the elastic valve plate. The thinning groove is adjacent to the clamping edge. The air hole and valve part are located at the position where the elastic valve plate is thinned by the thinning groove.

8. The integrated inflation and deflation structure according to claim 1, characterized in that, The inflation chambers are two separate chambers. Each inflation chamber corresponds to an exhaust channel, a protruding structure, a valve, an inflation hole, an air inlet chamber, and a mating part. The two inflation chambers are connected in series via a corresponding air inlet chamber. The exhaust channel is connected to the inflation chamber at the end of the series connection, and the air inlet channel is connected to an air inlet chamber that corresponds to the inflation chamber at the beginning of the series connection.

9. An air pump, comprising a rotary motor, a cylinder connected to the rotary motor, a linkage mechanism and a bladder assembled in the cylinder, wherein the rotary motor drives the bladder to perform an air delivery movement via the linkage mechanism, characterized in that, The air pump further includes an integrated inflation and deflation structure according to any one of claims 1 to 8, and the bladder is further provided with a check valve plate for preventing the gas in the air intake channel from flowing back into the bladder.

10. An air pump, comprising a rotary motor, a cylinder connected to the rotary motor, a linkage mechanism and a bladder assembled in the cylinder, wherein the rotary motor drives the bladder to perform an air delivery movement via the linkage mechanism, characterized in that, The air pump further includes an external inflation / deflation device and an integrated inflation / deflation structure according to any one of claims 1 to 7. The bladder is also provided with a check valve for preventing the gas in the air inlet channel from flowing back into the bladder. The external inflation / deflation device is stacked with the cover. The external inflation / deflation device has an external delivery channel, an external discharge channel, a first chamber communicating with the air outlet channel, a second chamber communicating with both the external delivery channel and the external discharge channel, a mating structure located in the first chamber, and a separating valve that separates the first chamber and the second chamber and is elastically deformable and displaceable. The separating valve has a connecting hole communicating with the first chamber and the second chamber. When the air pump is inflating, the mating structure opens the connecting hole, and the separating valve closes the external discharge channel. When the air pump stops working, the separating valve opens the external discharge channel, and the mating structure closes the connecting hole.

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